Tennessee Valley Authority (Form: 10-K, Received: 11/14/2023 06:03:56)

00013769862023FYFALSE——http://fasb.org/us-gaap/2023#AccountsPayableAndAccruedLiabilitiesCurrenthttp://fasb.org/us-gaap/2023#AccountsPayableAndAccruedLiabilitiesCurrenthttp://fasb.org/us-gaap/2023#OtherLiabilitieshttp://fasb.org/us-gaap/2023#OtherLiabilities00013769862022-10-012023-09-3000013769862023-09-30xbrli:sharesiso4217:USD00013769862022-09-3000013769862021-10-012022-09-3000013769862020-10-012021-09-3000013769862021-09-3000013769862020-09-300001376986tve:PowerProgramAppropriationInvestmentMember2020-09-300001376986tve:PowerProgramRetainedEarningsMember2020-09-300001376986tve:NonpowerProgramsAppropriationInvestmentNetMember2020-09-300001376986us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-09-300001376986tve:PowerProgramAppropriationInvestmentMember2020-10-012021-09-300001376986tve:PowerProgramRetainedEarningsMember2020-10-012021-09-300001376986tve:NonpowerProgramsAppropriationInvestmentNetMember2020-10-012021-09-300001376986us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-10-012021-09-300001376986tve:PowerProgramAppropriationInvestmentMember2021-09-300001376986tve:PowerProgramRetainedEarningsMember2021-09-300001376986tve:NonpowerProgramsAppropriationInvestmentNetMember2021-09-300001376986us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-09-300001376986tve:PowerProgramAppropriationInvestmentMember2021-10-012022-09-300001376986tve:PowerProgramRetainedEarningsMember2021-10-012022-09-300001376986tve:NonpowerProgramsAppropriationInvestmentNetMember2021-10-012022-09-300001376986us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-10-012022-09-300001376986tve:PowerProgramAppropriationInvestmentMember2022-09-300001376986tve:PowerProgramRetainedEarningsMember2022-09-300001376986tve:NonpowerProgramsAppropriationInvestmentNetMember2022-09-300001376986us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-09-300001376986tve:PowerProgramAppropriationInvestmentMember2022-10-012023-09-300001376986tve:PowerProgramRetainedEarningsMember2022-10-012023-09-300001376986tve:NonpowerProgramsAppropriationInvestmentNetMember2022-10-012023-09-300001376986us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-10-012023-09-300001376986tve:PowerProgramAppropriationInvestmentMember2023-09-300001376986tve:PowerProgramRetainedEarningsMember2023-09-300001376986tve:NonpowerProgramsAppropriationInvestmentNetMember2023-09-300001376986us-gaap:AccumulatedOtherComprehensiveIncomeMember2023-09-30tve:People00013769862016-09-300001376986us-gaap:PortionAtOtherThanFairValueFairValueDisclosureMember2023-09-300001376986us-gaap:PortionAtOtherThanFairValueFairValueDisclosureMember2022-09-30xbrli:pure0001376986us-gaap:NuclearPlantMember2022-10-012023-09-300001376986us-gaap:NuclearPlantMember2021-10-012022-09-300001376986us-gaap:NuclearPlantMember2020-10-012021-09-300001376986us-gaap:FossilFuelPlantMember2022-10-012023-09-300001376986us-gaap:FossilFuelPlantMember2021-10-012022-09-300001376986us-gaap:FossilFuelPlantMember2020-10-012021-09-300001376986tve:HydroPlantMember2022-10-012023-09-300001376986tve:HydroPlantMember2021-10-012022-09-300001376986tve:HydroPlantMember2020-10-012021-09-300001376986us-gaap:NaturalGasProcessingPlantMember2022-10-012023-09-300001376986us-gaap:NaturalGasProcessingPlantMember2021-10-012022-09-300001376986us-gaap:NaturalGasProcessingPlantMember2020-10-012021-09-300001376986us-gaap:ElectricTransmissionMember2022-10-012023-09-300001376986us-gaap:ElectricTransmissionMember2021-10-012022-09-300001376986us-gaap:ElectricTransmissionMember2020-10-012021-09-300001376986us-gaap:OtherPlantInServiceMember2022-10-012023-09-300001376986us-gaap:OtherPlantInServiceMember2021-10-012022-09-300001376986us-gaap:OtherPlantInServiceMember2020-10-012021-09-300001376986us-gaap:FossilFuelPlantMember2023-09-300001376986us-gaap:FossilFuelPlantMember2022-09-300001376986us-gaap:NaturalGasProcessingPlantMember2023-09-300001376986us-gaap:NaturalGasProcessingPlantMember2022-09-300001376986us-gaap:NuclearPlantMember2023-09-300001376986us-gaap:NuclearPlantMember2022-09-300001376986us-gaap:ElectricTransmissionMember2023-09-300001376986us-gaap:ElectricTransmissionMember2022-09-300001376986tve:HydroPlantMember2023-09-300001376986tve:HydroPlantMember2022-09-300001376986us-gaap:PropertyPlantAndEquipmentOtherTypesMember2023-09-300001376986us-gaap:PropertyPlantAndEquipmentOtherTypesMember2022-09-300001376986tve:MultipurposeDamsMember2023-09-300001376986tve:MultipurposeDamsMember2022-09-300001376986tve:OtherStewardshipMember2023-09-300001376986tve:OtherStewardshipMember2022-09-300001376986tve:CumberlandMember2023-07-012023-09-300001376986tve:CumberlandMember2022-10-012023-09-300001376986us-gaap:PropertyPlantAndEquipmentMember2022-10-012023-09-300001376986us-gaap:PropertyPlantAndEquipmentMember2021-10-012022-09-300001376986us-gaap:PropertyPlantAndEquipmentMember2020-10-012021-09-300001376986tve:OperatingLeaseLiabilityMember2022-09-300001376986us-gaap:OtherNoncurrentAssetsMember2023-09-300001376986us-gaap:OtherNoncurrentAssetsMember2022-09-300001376986srt:MinimumMembertve:EnergyRightMember2022-10-012023-09-300001376986srt:MaximumMembertve:EnergyRightMember2022-10-012023-09-300001376986tve:EnergyRightMember2022-10-012023-09-300001376986us-gaap:AccountsReceivableMember2023-09-300001376986us-gaap:AccountsReceivableMember2022-09-300001376986tve:EnergyRightLoanReserveMember2023-09-300001376986tve:EnergyRightLoanReserveMember2022-09-300001376986tve:EconomicDevelopmentLoanCollectiveReserveMember2023-09-300001376986tve:EconomicDevelopmentLoanCollectiveReserveMember2022-09-300001376986tve:EconomicDevelopmentLoanSpecificLoanReserveMember2023-09-300001376986tve:EconomicDevelopmentLoanSpecificLoanReserveMember2022-09-300001376986tve:UnrealizedlossesoninterestratederivativesMember2023-09-300001376986tve:UnrealizedlossesoninterestratederivativesMember2022-09-300001376986us-gaap:DeferredDerivativeGainLossMember2023-09-300001376986us-gaap:DeferredDerivativeGainLossMember2022-09-300001376986us-gaap:DeferredFuelCostsMember2023-09-300001376986us-gaap:DeferredFuelCostsMember2022-09-300001376986us-gaap:PensionCostsMember2023-09-300001376986us-gaap:PensionCostsMember2022-09-300001376986tve:NonNuclearDecommissioningMember2023-09-300001376986tve:NonNuclearDecommissioningMember2022-09-300001376986tve:NuclearDesommissioningCostsMember2023-09-300001376986tve:NuclearDesommissioningCostsMember2022-09-300001376986tve:OtherNonCurrentRegulatoryAssetsMember2023-09-300001376986tve:OtherNonCurrentRegulatoryAssetsMember2022-09-300001376986us-gaap:DeferredIncomeTaxChargesMember2023-09-300001376986us-gaap:DeferredIncomeTaxChargesMember2022-09-300001376986us-gaap:DeferredDerivativeGainLossMember2023-09-300001376986us-gaap:DeferredDerivativeGainLossMember2022-09-300001376986us-gaap:PostretirementBenefitCostsMember2023-09-300001376986us-gaap:PostretirementBenefitCostsMember2022-09-300001376986us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2012-09-300001376986tve:JsccgMember2012-09-300001376986tve:HoldcoMember2012-09-300001376986tve:SCCGMember2013-09-3000013769862013-09-300001376986us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2023-09-300001376986us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2022-09-300001376986us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2022-10-012023-09-300001376986us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2021-10-012022-09-300001376986us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2020-10-012021-09-300001376986us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2023-09-300001376986us-gaap:OtherNoncurrentLiabilitiesMember2023-09-300001376986us-gaap:OtherNoncurrentLiabilitiesMember2022-09-300001376986us-gaap:AccountsPayableAndAccruedLiabilitiesMember2023-09-300001376986us-gaap:AccountsPayableAndAccruedLiabilitiesMember2022-09-300001376986tve:NonNuclearMember2022-10-012023-09-300001376986tve:NonNuclearMember2021-10-012022-09-300001376986tve:NuclearMember2021-10-012022-09-300001376986tve:NuclearMember2021-09-300001376986tve:NonNuclearMember2021-09-300001376986tve:NuclearMember2022-09-300001376986tve:NonNuclearMember2022-09-300001376986tve:NuclearMember2022-10-012023-09-300001376986tve:NuclearMember2023-09-300001376986tve:NonNuclearMember2023-09-300001376986tve:SCCGMember2013-08-090001376986tve:JsccgMember2012-01-1700013769862012-01-170001376986tve:HoldcoMember2023-09-300001376986tve:Parrs1998SeriesDBondMember2023-09-300001376986tve:Parrs1998SeriesDBondMember2022-10-012023-09-300001376986tve:Parrs1999SeriesABondMember2023-09-300001376986tve:Parrs1999SeriesABondMember2022-10-012023-09-300001376986tve:A880591EY4Member2023-09-300001376986tve:A880591EY4Member2022-09-300001376986tve:A880591EZ1Member2023-09-300001376986tve:A880591EZ1Member2022-09-300001376986tve:TotalMember2022-10-012023-09-300001376986tve:TotalMember2021-10-012022-09-300001376986tve:A2009SeriesBMember2022-10-012023-09-300001376986tve:A2009SeriesBMember2021-10-012022-09-300001376986tve:A2012SeriesAMember2022-10-012023-09-300001376986tve:A2012SeriesAMember2021-10-012022-09-300001376986tve:DebtOfVariableInterestEntitiesMember2022-10-012023-09-300001376986tve:DebtOfVariableInterestEntitiesMember2021-10-012022-09-300001376986tve:TotalMember2022-10-012023-09-300001376986tve:TotalMember2021-10-012022-09-300001376986tve:TotalMember2023-09-300001376986tve:A880591EF5121520Member2022-10-012023-09-300001376986tve:A880591EF5121520Member2023-09-300001376986tve:A880591EF5121520Member2022-09-300001376986tve:A880591EF561521Member2022-10-012023-09-300001376986tve:A880591EF561521Member2023-09-300001376986tve:A880591EF561521Member2022-09-300001376986tve:A880591ER9Member2022-10-012023-09-300001376986tve:A880591ER9Member2023-09-300001376986tve:A880591ER9Member2022-09-300001376986tve:A880591ER9Member2022-10-012023-09-300001376986tve:A880591ER9Member2023-09-300001376986tve:A880591ER9Member2022-09-300001376986tve:A880591EW8Member2022-10-012023-09-300001376986tve:A880591EW8Member2023-09-300001376986tve:A880591EW8Member2022-09-300001376986tve:A880591Cj9Member2022-10-012023-09-300001376986tve:A880591Cj9Member2023-09-300001376986tve:A880591Cj9Member2022-09-300001376986tve:A880591EU2Member2022-10-012023-09-300001376986tve:A880591EU2Member2023-09-300001376986tve:A880591EU2Member2022-09-300001376986tve:A880591300Member2022-10-012023-09-300001376986tve:A880591300Member2023-09-300001376986tve:A880591300Member2022-09-300001376986tve:A880591409Member2022-10-012023-09-300001376986tve:A880591409Member2023-09-300001376986tve:A880591409Member2022-09-300001376986tve:A880591Dm1Member2022-10-012023-09-300001376986tve:A880591Dm1Member2023-09-300001376986tve:A880591Dm1Member2022-09-300001376986tve:A880591EX6Member2022-10-012023-09-300001376986tve:A880591EX6Member2023-09-300001376986tve:A880591EX6Member2022-09-300001376986tve:A880591Dp4Member2022-10-012023-09-300001376986tve:A880591Dp4Member2023-09-300001376986tve:A880591Dp4Member2022-09-300001376986tve:A880591Dv1Member2022-10-012023-09-300001376986tve:A880591Dv1Member2023-09-300001376986tve:A880591Dv1Member2022-09-300001376986tve:A880591Ef5Member2022-10-012023-09-300001376986tve:A880591Ef5Member2023-09-300001376986tve:A880591Ef5Member2022-09-300001376986tve:A880591Dx7Member2022-10-012023-09-300001376986tve:A880591Dx7Member2023-09-300001376986tve:A880591Dx7Member2022-09-300001376986tve:A880591Ck6Member2022-10-012023-09-300001376986tve:A880591Ck6Member2023-09-300001376986tve:A880591Ck6Member2022-09-300001376986tve:A880591Cs9Member2022-10-012023-09-300001376986tve:A880591Cs9Member2023-09-300001376986tve:A880591Cs9Member2022-09-300001376986tve:A880591Cp5Member2022-10-012023-09-300001376986tve:A880591Cp5Member2023-09-300001376986tve:A880591Cp5Member2022-09-300001376986tve:A880591Ed0Member2022-10-012023-09-300001376986tve:A880591Ed0Member2023-09-300001376986tve:A880591Ed0Member2022-09-300001376986tve:A880591Eh1Member2022-10-012023-09-300001376986tve:A880591Eh1Member2023-09-300001376986tve:A880591Eh1Member2022-09-300001376986tve:A880591EP3Member2022-10-012023-09-300001376986tve:A880591EP3Member2023-09-300001376986tve:A880591EP3Member2022-09-300001376986tve:A880591Du3Member2022-10-012023-09-300001376986tve:A880591Du3Member2023-09-300001376986tve:A880591Du3Member2022-09-300001376986tve:A880591Eb4Member2022-10-012023-09-300001376986tve:A880591Eb4Member2023-09-300001376986tve:A880591Eb4Member2022-09-300001376986tve:A880591Dz2Member2022-10-012023-09-300001376986tve:A880591Dz2Member2023-09-300001376986tve:A880591Dz2Member2022-09-300001376986tve:A880591Ej7Member2022-10-012023-09-300001376986tve:A880591Ej7Member2023-09-300001376986tve:A880591Ej7Member2022-09-300001376986tve:A880591ES7Member2022-10-012023-09-300001376986tve:A880591ES7Member2023-09-300001376986tve:A880591ES7Member2022-09-300001376986tve:A880591EY4Member2022-10-012023-09-300001376986tve:A880591EZ1Member2022-10-012023-09-300001376986srt:ScenarioForecastMember2025-09-300001376986srt:ScenarioForecastMember2026-09-300001376986srt:ScenarioForecastMember2027-09-300001376986srt:ScenarioForecastMember2028-09-300001376986srt:ScenarioForecastMember2029-09-300001376986us-gaap:UnsecuredDebtMember2023-09-300001376986us-gaap:ShortTermDebtMember2023-09-300001376986us-gaap:RevolvingCreditFacilityMember2023-09-30tve:Credit_facilities0001376986us-gaap:LetterOfCreditMember2023-09-300001376986us-gaap:LetterOfCreditMember2022-09-300001376986tve:KemperLagoonCreekLeaseholdInterestsMember2022-10-012023-09-300001376986tve:LagoonCreekMember2022-10-012023-09-300001376986tve:KemperMember2022-10-012023-09-300001376986tve:LagoonCreekMember2022-10-012023-09-300001376986srt:ScenarioForecastMembertve:LagoonCreekMember2023-10-012052-09-300001376986srt:ScenarioForecastMembertve:LagoonCreekMember2052-10-012053-09-300001376986us-gaap:OtherRegulatoryAssetsLiabilitiesMemberus-gaap:InterestRateSwapMember2022-10-012023-09-300001376986us-gaap:OtherRegulatoryAssetsLiabilitiesMemberus-gaap:InterestRateSwapMember2021-10-012022-09-300001376986us-gaap:OtherRegulatoryAssetsLiabilitiesMembertve:CommodityContractUnderFHPMember2022-10-012023-09-300001376986us-gaap:OtherRegulatoryAssetsLiabilitiesMembertve:CommodityContractUnderFHPMember2021-10-012022-09-300001376986tve:FuelExpenseMembertve:CommodityContractUnderFHPMember2022-10-012023-09-300001376986tve:CommodityContractUnderFHPMembertve:PurchasedPowerExpenseMember2022-10-012023-09-300001376986tve:FuelExpenseMembertve:CommodityContractUnderFHPMember2021-10-012022-09-300001376986tve:CommodityContractUnderFHPMembertve:PurchasedPowerExpenseMember2021-10-012022-09-300001376986tve:A250MillionSterlingCurrencySwapMember2023-09-300001376986tve:A250MillionSterlingCurrencySwapMemberus-gaap:AccountsPayableAndAccruedLiabilitiesMember2023-09-300001376986us-gaap:OtherNoncurrentLiabilitiesMembertve:A250MillionSterlingCurrencySwapMember2023-09-300001376986tve:A250MillionSterlingCurrencySwapMember2022-09-300001376986tve:A250MillionSterlingCurrencySwapMemberus-gaap:AccountsPayableAndAccruedLiabilitiesMember2022-09-300001376986us-gaap:OtherNoncurrentLiabilitiesMembertve:A250MillionSterlingCurrencySwapMember2022-09-300001376986tve:A150MillionSterlingCurrencySwapMember2023-09-300001376986tve:A150MillionSterlingCurrencySwapMemberus-gaap:AccountsPayableAndAccruedLiabilitiesMember2023-09-300001376986tve:A150MillionSterlingCurrencySwapMemberus-gaap:OtherNoncurrentLiabilitiesMember2023-09-300001376986tve:A150MillionSterlingCurrencySwapMember2022-09-300001376986tve:A150MillionSterlingCurrencySwapMemberus-gaap:AccountsPayableAndAccruedLiabilitiesMember2022-09-300001376986tve:A150MillionSterlingCurrencySwapMemberus-gaap:OtherNoncurrentLiabilitiesMember2022-09-300001376986tve:A10BillionNotionalInterestRateSwapMember2023-09-300001376986tve:A10BillionNotionalInterestRateSwapMemberus-gaap:OtherCurrentAssetsMember2023-09-300001376986tve:A10BillionNotionalInterestRateSwapMembertve:InterestPayableCurrentMember2023-09-300001376986tve:A10BillionNotionalInterestRateSwapMemberus-gaap:OtherNoncurrentLiabilitiesMember2023-09-300001376986tve:A10BillionNotionalInterestRateSwapMember2022-09-300001376986tve:A10BillionNotionalInterestRateSwapMemberus-gaap:AccountsPayableAndAccruedLiabilitiesMember2022-09-300001376986tve:A10BillionNotionalInterestRateSwapMembertve:InterestPayableCurrentMember2022-09-300001376986tve:A10BillionNotionalInterestRateSwapMemberus-gaap:OtherNoncurrentLiabilitiesMember2022-09-300001376986tve:A476MillionNotionalInterestRateSwapMember2023-09-300001376986us-gaap:OtherCurrentAssetsMembertve:A476MillionNotionalInterestRateSwapMember2023-09-300001376986tve:A476MillionNotionalInterestRateSwapMembertve:InterestPayableCurrentMember2023-09-300001376986us-gaap:OtherNoncurrentLiabilitiesMembertve:A476MillionNotionalInterestRateSwapMember2023-09-300001376986tve:A476MillionNotionalInterestRateSwapMember2022-09-300001376986tve:A476MillionNotionalInterestRateSwapMemberus-gaap:AccountsPayableAndAccruedLiabilitiesMember2022-09-300001376986tve:A476MillionNotionalInterestRateSwapMembertve:InterestPayableCurrentMember2022-09-300001376986us-gaap:OtherNoncurrentLiabilitiesMembertve:A476MillionNotionalInterestRateSwapMember2022-09-300001376986us-gaap:CommodityContractMember2023-09-300001376986us-gaap:OtherCurrentAssetsMemberus-gaap:CommodityContractMember2023-09-300001376986us-gaap:OtherNoncurrentAssetsMemberus-gaap:CommodityContractMember2023-09-300001376986us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:CommodityContractMember2023-09-300001376986us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:CommodityContractMember2023-09-300001376986us-gaap:CommodityContractMember2022-09-300001376986us-gaap:OtherCurrentAssetsMemberus-gaap:CommodityContractMember2022-09-300001376986us-gaap:OtherNoncurrentAssetsMemberus-gaap:CommodityContractMember2022-09-300001376986us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:CommodityContractMember2022-09-300001376986us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:CommodityContractMember2022-09-300001376986tve:CommodityContractUnderFHPMember2023-09-300001376986tve:CommodityContractUnderFHPMemberus-gaap:AccountsPayableAndAccruedLiabilitiesMember2023-09-300001376986tve:CommodityContractUnderFHPMemberus-gaap:OtherNoncurrentLiabilitiesMember2023-09-300001376986tve:CommodityContractUnderFHPMember2022-09-300001376986tve:CommodityContractUnderFHPMemberus-gaap:AccountsReceivableMember2022-09-300001376986us-gaap:OtherCurrentAssetsMembertve:CommodityContractUnderFHPMember2022-09-300001376986tve:CommodityContractUnderFHPMemberus-gaap:OtherNoncurrentAssetsMember2022-09-300001376986tve:CommodityContractUnderFHPMemberus-gaap:AccountsPayableAndAccruedLiabilitiesMember2022-09-30iso4217:GBP0001376986us-gaap:InterestRateSwapMember2023-09-300001376986us-gaap:InterestRateSwapMember2022-09-300001376986us-gaap:CurrencySwapMember2023-09-300001376986us-gaap:CurrencySwapMember2022-09-300001376986tve:InterestSwapCollateralMember2023-09-300001376986us-gaap:FairValueInputsLevel2Member2023-09-300001376986us-gaap:FairValueInputsLevel2Member2022-09-300001376986us-gaap:CreditRiskMember2023-09-300001376986us-gaap:CollateralizedSecuritiesMember2023-09-300001376986tve:CreditOfCustomersMember2022-10-012023-09-30tve:Customers0001376986srt:MoodysA2RatingMember2022-10-012023-09-300001376986srt:MoodysB1RatingMember2022-10-012023-09-300001376986srt:MoodysA1RatingMember2022-10-012023-09-300001376986tve:NdtMember2023-09-300001376986tve:ArtMember2023-09-30tve:Units0001376986us-gaap:EquityFundsMembertve:NdtMember2023-09-300001376986us-gaap:RealEstateFundsMembertve:NdtMember2023-09-300001376986us-gaap:CreditMembertve:NdtMember2023-09-300001376986tve:ArtMemberus-gaap:PrivateEquityFundsMember2023-09-300001376986tve:ArtMembertve:PrivateRealEstateFundsMember2023-09-300001376986tve:ArtMembertve:PrivateCreditMember2023-09-300001376986tve:NdtMember2022-10-012023-09-300001376986tve:NdtMember2021-10-012022-09-300001376986tve:ArtMember2022-10-012023-09-300001376986tve:ArtMember2021-10-012022-09-300001376986tve:SerpMember2022-10-012023-09-300001376986tve:SerpMember2021-10-012022-09-300001376986tve:LTDCPMember2022-10-012023-09-300001376986tve:LTDCPMember2021-10-012022-09-300001376986tve:RPMember2022-10-012023-09-300001376986us-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:FairValueInputsLevel3Member2023-09-300001376986tve:CommodityContractUnderFHPMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:FairValueInputsLevel2Membertve:CommodityContractUnderFHPMember2023-09-300001376986tve:CommodityContractUnderFHPMemberus-gaap:FairValueInputsLevel3Member2023-09-300001376986srt:AffiliatedEntityMember2023-09-300001376986us-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:FairValueInputsLevel3Member2022-09-300001376986tve:CommodityContractUnderFHPMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:FairValueInputsLevel2Membertve:CommodityContractUnderFHPMember2022-09-300001376986tve:CommodityContractUnderFHPMemberus-gaap:FairValueInputsLevel3Member2022-09-300001376986srt:AffiliatedEntityMember2022-09-300001376986stpr:AL2022-10-012023-09-300001376986stpr:AL2021-10-012022-09-300001376986stpr:AL2020-10-012021-09-300001376986stpr:GA2022-10-012023-09-300001376986stpr:GA2021-10-012022-09-300001376986stpr:GA2020-10-012021-09-300001376986stpr:KY2022-10-012023-09-300001376986stpr:KY2021-10-012022-09-300001376986stpr:KY2020-10-012021-09-300001376986stpr:MS2022-10-012023-09-300001376986stpr:MS2021-10-012022-09-300001376986stpr:MS2020-10-012021-09-300001376986stpr:NC2022-10-012023-09-300001376986stpr:NC2021-10-012022-09-300001376986stpr:NC2020-10-012021-09-300001376986stpr:TN2022-10-012023-09-300001376986stpr:TN2021-10-012022-09-300001376986stpr:TN2020-10-012021-09-300001376986stpr:VA2022-10-012023-09-300001376986stpr:VA2021-10-012022-09-300001376986stpr:VA2020-10-012021-09-300001376986tve:LocalPowerCompanyMember2022-10-012023-09-300001376986tve:LocalPowerCompanyMember2021-10-012022-09-300001376986tve:LocalPowerCompanyMember2020-10-012021-09-300001376986tve:IndustriesDirectlyServedMember2022-10-012023-09-300001376986tve:IndustriesDirectlyServedMember2021-10-012022-09-300001376986tve:IndustriesDirectlyServedMember2020-10-012021-09-300001376986tve:FederalagenciesandotherMember2022-10-012023-09-300001376986tve:FederalagenciesandotherMember2021-10-012022-09-300001376986tve:FederalagenciesandotherMember2020-10-012021-09-300001376986tve:A20yearcontractarrangementMember2022-10-012023-09-300001376986tve:A20yearcontractarrangementMember2022-10-012023-09-300001376986tve:A5yearcontractarrangementMember2023-09-300001376986tve:A5yearcontractarrangementMember2022-10-012023-09-300001376986tve:A5yearcontractarrangementMember2022-10-012023-09-300001376986us-gaap:AccountsPayableAndAccruedLiabilitiesMember2022-10-012023-09-300001376986us-gaap:AccountsPayableAndAccruedLiabilitiesMember2021-10-012022-09-300001376986us-gaap:AccountsPayableAndAccruedLiabilitiesMember2020-10-012021-09-300001376986srt:MinimumMember2022-10-012023-09-300001376986us-gaap:PensionPlansDefinedBenefitMember2023-09-300001376986us-gaap:PensionPlansDefinedBenefitMember2022-09-300001376986us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2023-09-300001376986us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-09-300001376986us-gaap:PensionPlansDefinedBenefitMember2022-10-012023-09-300001376986us-gaap:PensionPlansDefinedBenefitMember2021-10-012022-09-300001376986us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-10-012023-09-300001376986us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-10-012022-09-300001376986us-gaap:PensionPlansDefinedBenefitMember2021-09-300001376986us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-09-300001376986tve:PensionandOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrentMember2023-09-300001376986tve:PensionandOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrentMember2022-09-300001376986us-gaap:PensionPlansDefinedBenefitMember2020-10-012021-09-300001376986us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-10-012021-09-300001376986tve:PreMedicareEligiblePerCapitaClaimCostsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-10-012023-09-300001376986tve:PreMedicareEligiblePerCapitaClaimCostsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-10-012022-09-300001376986tve:PreMedicareEligiblePerCapitaClaimCostsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2023-09-300001376986tve:PreMedicareEligiblePerCapitaClaimCostsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-09-300001376986us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMembertve:PreMedicareEligiblePerCapitaContributionsMember2022-10-012023-09-300001376986us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMembertve:PreMedicareEligiblePerCapitaContributionsMember2021-10-012022-09-300001376986us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMembertve:PreMedicareEligiblePerCapitaContributionsMember2023-09-300001376986us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMembertve:PreMedicareEligiblePerCapitaContributionsMember2022-09-300001376986tve:PostMedicareEligibleMemberMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2023-09-300001376986tve:PostMedicareEligibleMemberMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-09-300001376986tve:PostMedicareEligibleMemberMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2022-10-012023-09-300001376986tve:PostMedicareEligibleMemberMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-10-012022-09-300001376986srt:ScenarioForecastMemberus-gaap:PensionPlansDefinedBenefitMember2024-09-300001376986tve:PreMedicareEligiblePerCapitaClaimCostsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-09-300001376986tve:PreMedicareEligiblePerCapitaClaimCostsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-10-012021-09-300001376986us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMembertve:PreMedicareEligiblePerCapitaContributionsMember2021-09-300001376986us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMembertve:PreMedicareEligiblePerCapitaContributionsMember2020-10-012021-09-300001376986tve:PostMedicareEligibleMemberMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-09-300001376986tve:PostMedicareEligibleMemberMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-10-012021-09-300001376986srt:MinimumMember2023-09-300001376986srt:MaximumMember2023-09-300001376986tve:PensionPlanDiscountRateMember2023-09-300001376986tve:PensionPlanDiscountRateMember2022-10-012023-09-300001376986tve:PensionBenefitExpectedRateOfReturnOnPlanAssetsMember2023-09-300001376986tve:PensionBenefitExpectedRateOfReturnOnPlanAssetsMember2022-10-012023-09-300001376986tve:CostofLivingAdjustmentsDomain2023-09-300001376986tve:CostofLivingAdjustmentsDomain2022-10-012023-09-300001376986tve:GrowthAssetsMember2023-09-300001376986tve:GrowthAssetsMember2022-09-300001376986tve:DefensiveGrowthAssetsMember2023-09-300001376986tve:DefensiveGrowthAssetsMember2022-09-300001376986tve:DefensiveAssetsMember2023-09-300001376986tve:DefensiveAssetsMember2022-09-300001376986tve:InflationSensitiveAssetsMember2023-09-300001376986tve:InflationSensitiveAssetsMember2022-09-300001376986us-gaap:EquitySecuritiesMember2023-09-300001376986us-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:EquitySecuritiesMember2023-09-300001376986us-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Member2023-09-300001376986tve:PreferredsecuritiesMember2023-09-300001376986tve:PreferredsecuritiesMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:FairValueInputsLevel2Membertve:PreferredsecuritiesMember2023-09-300001376986tve:PreferredsecuritiesMemberus-gaap:FairValueInputsLevel3Member2023-09-300001376986us-gaap:CorporateDebtSecuritiesMember2023-09-300001376986us-gaap:FairValueInputsLevel1Memberus-gaap:CorporateDebtSecuritiesMember2023-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:CorporateDebtSecuritiesMember2023-09-300001376986us-gaap:FairValueInputsLevel3Memberus-gaap:CorporateDebtSecuritiesMember2023-09-300001376986us-gaap:MortgageBackedSecuritiesMember2023-09-300001376986us-gaap:MortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:MortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Member2023-09-300001376986us-gaap:MortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Member2023-09-300001376986us-gaap:USTreasuryAndGovernmentMember2023-09-300001376986us-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:USTreasuryAndGovernmentMember2023-09-300001376986us-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueInputsLevel3Member2023-09-300001376986us-gaap:ForeignGovernmentDebtSecuritiesMember2023-09-300001376986us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:ForeignGovernmentDebtSecuritiesMember2023-09-300001376986us-gaap:FairValueInputsLevel3Memberus-gaap:ForeignGovernmentDebtSecuritiesMember2023-09-300001376986us-gaap:CollateralizedDebtObligationsMember2023-09-300001376986us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:CollateralizedDebtObligationsMember2023-09-300001376986us-gaap:FairValueInputsLevel3Memberus-gaap:CollateralizedDebtObligationsMember2023-09-300001376986us-gaap:MunicipalBondsMember2023-09-300001376986us-gaap:FairValueInputsLevel1Memberus-gaap:MunicipalBondsMember2023-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:MunicipalBondsMember2023-09-300001376986us-gaap:FairValueInputsLevel3Memberus-gaap:MunicipalBondsMember2023-09-300001376986tve:CollateralizedCommercialMortgageBackedSecuritiesMember2023-09-300001376986tve:CollateralizedCommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:FairValueInputsLevel2Membertve:CollateralizedCommercialMortgageBackedSecuritiesMember2023-09-300001376986tve:CollateralizedCommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Member2023-09-300001376986tve:EquitySecurityCommingledFundsMember2023-09-300001376986tve:EquitySecurityCommingledFundsMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:FairValueInputsLevel2Membertve:EquitySecurityCommingledFundsMember2023-09-300001376986tve:EquitySecurityCommingledFundsMemberus-gaap:FairValueInputsLevel3Member2023-09-300001376986tve:DebtSecurityCommingledFundsMember2023-09-300001376986tve:DebtSecurityCommingledFundsMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:FairValueInputsLevel2Membertve:DebtSecurityCommingledFundsMember2023-09-300001376986us-gaap:FairValueInputsLevel3Membertve:DebtSecurityCommingledFundsMember2023-09-300001376986tve:BlendedSecurityCommingledFundsMember2023-09-300001376986tve:BlendedSecurityCommingledFundsMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986tve:BlendedSecurityCommingledFundsMemberus-gaap:FairValueInputsLevel2Member2023-09-300001376986tve:BlendedSecurityCommingledFundsMemberus-gaap:FairValueInputsLevel3Member2023-09-300001376986us-gaap:FixedIncomeFundsMember2023-09-300001376986us-gaap:FixedIncomeFundsMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:FixedIncomeFundsMember2023-09-300001376986us-gaap:FixedIncomeFundsMemberus-gaap:FairValueInputsLevel3Member2023-09-300001376986us-gaap:CashAndCashEquivalentsMember2023-09-300001376986us-gaap:CashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:CashAndCashEquivalentsMember2023-09-300001376986us-gaap:FairValueInputsLevel3Memberus-gaap:CashAndCashEquivalentsMember2023-09-300001376986tve:PrivateCreditMember2023-09-300001376986us-gaap:FairValueInputsLevel1Membertve:PrivateCreditMember2023-09-300001376986us-gaap:FairValueInputsLevel2Membertve:PrivateCreditMember2023-09-300001376986us-gaap:FairValueInputsLevel3Membertve:PrivateCreditMember2023-09-300001376986us-gaap:PrivateEquityFundsMember2023-09-300001376986us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel2Member2023-09-300001376986us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel3Member2023-09-300001376986tve:PrivateRealEstateFundsMember2023-09-300001376986tve:PrivateRealEstateFundsMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:FairValueInputsLevel2Membertve:PrivateRealEstateFundsMember2023-09-300001376986tve:PrivateRealEstateFundsMemberus-gaap:FairValueInputsLevel3Member2023-09-300001376986tve:CashCollateralForBorrowedSecuritiesMember2023-09-300001376986us-gaap:FairValueInputsLevel1Membertve:CashCollateralForBorrowedSecuritiesMember2023-09-300001376986us-gaap:FairValueInputsLevel2Membertve:CashCollateralForBorrowedSecuritiesMember2023-09-300001376986us-gaap:FairValueInputsLevel3Membertve:CashCollateralForBorrowedSecuritiesMember2023-09-300001376986us-gaap:FutureMember2023-09-300001376986us-gaap:FairValueInputsLevel1Memberus-gaap:FutureMember2023-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:FutureMember2023-09-300001376986us-gaap:FairValueInputsLevel3Memberus-gaap:FutureMember2023-09-300001376986us-gaap:SwapMember2023-09-300001376986us-gaap:SwapMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:SwapMember2023-09-300001376986us-gaap:SwapMemberus-gaap:FairValueInputsLevel3Member2023-09-300001376986us-gaap:ForeignExchangeContractMember2023-09-300001376986us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel2Member2023-09-300001376986us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel3Member2023-09-300001376986us-gaap:InterestRateSwapMember2023-09-300001376986us-gaap:InterestRateSwapMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:InterestRateSwapMemberus-gaap:FairValueInputsLevel2Member2023-09-300001376986us-gaap:InterestRateSwapMemberus-gaap:FairValueInputsLevel3Member2023-09-300001376986us-gaap:CreditDefaultSwapMember2023-09-300001376986us-gaap:CreditDefaultSwapMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:CreditDefaultSwapMember2023-09-300001376986us-gaap:CreditDefaultSwapMemberus-gaap:FairValueInputsLevel3Member2023-09-300001376986us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMember2023-09-300001376986us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMemberus-gaap:FairValueInputsLevel1Member2023-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMember2023-09-300001376986us-gaap:FairValueInputsLevel3Memberus-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMember2023-09-300001376986us-gaap:EquitySecuritiesMember2022-09-300001376986us-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:EquitySecuritiesMember2022-09-300001376986us-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel3Member2022-09-300001376986tve:PreferredsecuritiesMember2022-09-300001376986tve:PreferredsecuritiesMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:FairValueInputsLevel2Membertve:PreferredsecuritiesMember2022-09-300001376986tve:PreferredsecuritiesMemberus-gaap:FairValueInputsLevel3Member2022-09-300001376986us-gaap:CorporateDebtSecuritiesMember2022-09-300001376986us-gaap:FairValueInputsLevel1Memberus-gaap:CorporateDebtSecuritiesMember2022-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:CorporateDebtSecuritiesMember2022-09-300001376986us-gaap:FairValueInputsLevel3Memberus-gaap:CorporateDebtSecuritiesMember2022-09-300001376986us-gaap:MortgageBackedSecuritiesMember2022-09-300001376986us-gaap:MortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:MortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Member2022-09-300001376986us-gaap:MortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Member2022-09-300001376986us-gaap:USTreasuryAndGovernmentMember2022-09-300001376986us-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:USTreasuryAndGovernmentMember2022-09-300001376986us-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueInputsLevel3Member2022-09-300001376986us-gaap:ForeignGovernmentDebtSecuritiesMember2022-09-300001376986us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:ForeignGovernmentDebtSecuritiesMember2022-09-300001376986us-gaap:FairValueInputsLevel3Memberus-gaap:ForeignGovernmentDebtSecuritiesMember2022-09-300001376986us-gaap:CollateralizedDebtObligationsMember2022-09-300001376986us-gaap:CollateralizedDebtObligationsMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:CollateralizedDebtObligationsMember2022-09-300001376986us-gaap:FairValueInputsLevel3Memberus-gaap:CollateralizedDebtObligationsMember2022-09-300001376986us-gaap:MunicipalBondsMember2022-09-300001376986us-gaap:FairValueInputsLevel1Memberus-gaap:MunicipalBondsMember2022-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:MunicipalBondsMember2022-09-300001376986us-gaap:FairValueInputsLevel3Memberus-gaap:MunicipalBondsMember2022-09-300001376986tve:CollateralizedCommercialMortgageBackedSecuritiesMember2022-09-300001376986tve:CollateralizedCommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:FairValueInputsLevel2Membertve:CollateralizedCommercialMortgageBackedSecuritiesMember2022-09-300001376986tve:CollateralizedCommercialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel3Member2022-09-300001376986tve:EquitySecurityCommingledFundsMember2022-09-300001376986tve:EquitySecurityCommingledFundsMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:FairValueInputsLevel2Membertve:EquitySecurityCommingledFundsMember2022-09-300001376986tve:EquitySecurityCommingledFundsMemberus-gaap:FairValueInputsLevel3Member2022-09-300001376986tve:DebtSecurityCommingledFundsMember2022-09-300001376986tve:DebtSecurityCommingledFundsMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:FairValueInputsLevel2Membertve:DebtSecurityCommingledFundsMember2022-09-300001376986us-gaap:FairValueInputsLevel3Membertve:DebtSecurityCommingledFundsMember2022-09-300001376986tve:BlendedSecurityCommingledFundsMember2022-09-300001376986tve:BlendedSecurityCommingledFundsMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986tve:BlendedSecurityCommingledFundsMemberus-gaap:FairValueInputsLevel2Member2022-09-300001376986tve:BlendedSecurityCommingledFundsMemberus-gaap:FairValueInputsLevel3Member2022-09-300001376986us-gaap:FixedIncomeFundsMember2022-09-300001376986us-gaap:FixedIncomeFundsMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:FixedIncomeFundsMember2022-09-300001376986us-gaap:FixedIncomeFundsMemberus-gaap:FairValueInputsLevel3Member2022-09-300001376986us-gaap:CashAndCashEquivalentsMember2022-09-300001376986us-gaap:CashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:CashAndCashEquivalentsMember2022-09-300001376986us-gaap:FairValueInputsLevel3Memberus-gaap:CashAndCashEquivalentsMember2022-09-300001376986tve:PrivateCreditMember2022-09-300001376986us-gaap:FairValueInputsLevel1Membertve:PrivateCreditMember2022-09-300001376986us-gaap:FairValueInputsLevel2Membertve:PrivateCreditMember2022-09-300001376986us-gaap:FairValueInputsLevel3Membertve:PrivateCreditMember2022-09-300001376986us-gaap:PrivateEquityFundsMember2022-09-300001376986us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel2Member2022-09-300001376986us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel3Member2022-09-300001376986tve:PrivateRealEstateFundsMember2022-09-300001376986tve:PrivateRealEstateFundsMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:FairValueInputsLevel2Membertve:PrivateRealEstateFundsMember2022-09-300001376986tve:PrivateRealEstateFundsMemberus-gaap:FairValueInputsLevel3Member2022-09-300001376986tve:CashCollateralForBorrowedSecuritiesMember2022-09-300001376986us-gaap:FairValueInputsLevel1Membertve:CashCollateralForBorrowedSecuritiesMember2022-09-300001376986us-gaap:FairValueInputsLevel2Membertve:CashCollateralForBorrowedSecuritiesMember2022-09-300001376986us-gaap:FairValueInputsLevel3Membertve:CashCollateralForBorrowedSecuritiesMember2022-09-300001376986us-gaap:FutureMember2022-09-300001376986us-gaap:FairValueInputsLevel1Memberus-gaap:FutureMember2022-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:FutureMember2022-09-300001376986us-gaap:FairValueInputsLevel3Memberus-gaap:FutureMember2022-09-300001376986us-gaap:SwapMember2022-09-300001376986us-gaap:SwapMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:SwapMember2022-09-300001376986us-gaap:SwapMemberus-gaap:FairValueInputsLevel3Member2022-09-300001376986us-gaap:ForeignExchangeContractMember2022-09-300001376986us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel2Member2022-09-300001376986us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel3Member2022-09-300001376986us-gaap:InterestRateSwapMember2022-09-300001376986us-gaap:InterestRateSwapMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:InterestRateSwapMemberus-gaap:FairValueInputsLevel2Member2022-09-300001376986us-gaap:InterestRateSwapMemberus-gaap:FairValueInputsLevel3Member2022-09-300001376986us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMember2022-09-300001376986us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMemberus-gaap:FairValueInputsLevel1Member2022-09-300001376986us-gaap:FairValueInputsLevel2Memberus-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMember2022-09-300001376986us-gaap:FairValueInputsLevel3Memberus-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMember2022-09-300001376986us-gaap:FairValueInputsLevel3Member2019-10-010001376986us-gaap:FairValueInputsLevel3Member2021-10-012022-09-300001376986us-gaap:FairValueInputsLevel3Member2022-10-012023-09-30tve:Years0001376986srt:MaximumMember2022-10-012023-09-300001376986us-gaap:OtherPensionPlansDefinedBenefitMember2022-10-012023-09-300001376986us-gaap:OtherPensionPlansDefinedBenefitMembersrt:MinimumMember2022-10-012023-09-300001376986us-gaap:SupplementalEmployeeRetirementPlanDefinedBenefitMember2022-10-012023-09-300001376986us-gaap:SupplementalEmployeeRetirementPlanDefinedBenefitMember2021-10-012022-09-300001376986us-gaap:OtherPensionPlansDefinedBenefitMembersrt:ScenarioForecastMember2023-10-012024-09-300001376986tve:PensionandOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrentMember2021-09-300001376986srt:ScenarioForecastMemberus-gaap:AccountsPayableAndAccruedLiabilitiesMember2024-09-300001376986srt:ScenarioForecastMember2022-10-012026-09-30tve:Megawattstve:megawatts0001376986srt:ScenarioForecastMember2024-09-300001376986tve:PurchaseAgreementsRequiredByFederalLawMember2023-09-30tve:Insurance_layerstve:reactorstve:Procedures0001376986tve:GeneralMember2023-09-300001376986us-gaap:OtherNoncurrentLiabilitiesMembertve:GeneralMember2023-09-300001376986us-gaap:AccountsPayableAndAccruedLiabilitiesMembertve:GeneralMember2023-09-300001376986tve:EnvironmentalAgreementsMember2023-09-300001376986srt:AffiliatedEntityMember2022-10-012023-09-300001376986srt:AffiliatedEntityMember2021-10-012022-09-300001376986srt:AffiliatedEntityMember2020-10-012021-09-300001376986srt:AffiliatedEntityMember2021-09-3000013769862023-07-012023-09-30

Table of Contents

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(MARK ONE)

x ANNUAL REPORT PURSUANT TO

SECTION 13, 15(d), OR 37 OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended September 30, 2023

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from _____ to _____

Commission file number 000-52313

TENNESSEE VALLEY AUTHORITY

(Exact name of registrant as specified in its charter)


A corporate agency of the United States created by an act of Congress (State or other jurisdiction of incorporation or organization)									62-0474417 (IRS Employer Identification No.)

400 W. Summit Hill Drive Knoxville, Tennessee (Address of principal executive offices)									37902 (Zip Code)

(865) 632-2101

(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:


Title of each class	Trading Symbol(s)	Name of each exchange on which registered
N/A	N/A	N/A

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

Yes o No x

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13, Section 15(d), or Section 37 of the Act.

Yes o No x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13, 15(d), or 37 of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes x No o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

Yes x No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer o Emerging growth company o Smaller reporting company o

Non-accelerated filer x Accelerated filer o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. x

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. o

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant's executive officers during the relevant recovery period pursuant to §240.10D-1(b). o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes o No x

Estimated aggregate market value of the common equity held by non-affiliates of TVA at March 31, 2023: N/A

Number of shares of common stock outstanding at November 13, 2023: N/A

Table of Contents


Table of Contents
GLOSSARY OF COMMON ACRONYMS.......................................................................................................................................................................................................			4
FORWARD-LOOKING INFORMATION.........................................................................................................................................................................................................			6
GENERAL INFORMATION............................................................................................................................................................................................................................			8

PART I

ITEM 1. BUSINESS......................................................................................................................................................................................................................................			9
The Corporation.................................................................................................................................................................................................................................			9
Service Area.......................................................................................................................................................................................................................................			9
Customers..........................................................................................................................................................................................................................................			11
Rates..................................................................................................................................................................................................................................................			12
Power Supply and Load Management Resources.............................................................................................................................................................................			12
Fuel Supply.........................................................................................................................................................................................................................................			20
Transmission......................................................................................................................................................................................................................................			22
Weather and Seasonality....................................................................................................................................................................................................................			23
Competition........................................................................................................................................................................................................................................			23
Research and Development...............................................................................................................................................................................................................			23
Flood Control Activities.......................................................................................................................................................................................................................			25
Environmental Stewardship Activities.................................................................................................................................................................................................			25
Economic Development Activities......................................................................................................................................................................................................			25
Regulation..........................................................................................................................................................................................................................................			26
Taxation and Tax Equivalents.............................................................................................................................................................................................................			28
Environmental Matters.......................................................................................................................................................................................................................			28
Human Capital Management..............................................................................................................................................................................................................			36

ITEM 1A. RISK FACTORS............................................................................................................................................................................................................................			43

ITEM 1B. UNRESOLVED STAFF COMMENTS............................................................................................................................................................................................			58

ITEM 1C. CYBERSECURITY.........................................................................................................................................................................................................................			58

ITEM 2. PROPERTIES..................................................................................................................................................................................................................................			58
Generating Properties........................................................................................................................................................................................................................			58
Transmission Properties.....................................................................................................................................................................................................................			60
Natural Resource Stewardship Properties.........................................................................................................................................................................................			60
Buildings.............................................................................................................................................................................................................................................			60
Disposal of Property...........................................................................................................................................................................................................................			60

ITEM 3. LEGAL PROCEEDINGS..................................................................................................................................................................................................................			61

ITEM 4. MINE SAFETY DISCLOSURES......................................................................................................................................................................................................			61

PART II

ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES............			62

ITEM 6. RESERVED......................................................................................................................................................................................................................................			62

ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS...................................................................			62
Business and Mission.........................................................................................................................................................................................................................			62
Executive Overview............................................................................................................................................................................................................................			65
Results of Operations.........................................................................................................................................................................................................................			66
Liquidity and Capital Resources.........................................................................................................................................................................................................			71
Key Initiatives and Challenges...........................................................................................................................................................................................................			76
Critical Accounting Estimates..............................................................................................................................................................................................................			84
New Accounting Standards and Interpretations.................................................................................................................................................................................			90
Legislative and Regulatory Matters....................................................................................................................................................................................................			90
Environmental Matters.......................................................................................................................................................................................................................			90
Legal Proceedings..............................................................................................................................................................................................................................			90
Risk Management Activities...............................................................................................................................................................................................................			90

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK...........................................................................................................................			93

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA..........................................................................................................................................................			94
Consolidated Balance Sheets............................................................................................................................................................................................................			94
Consolidated Statements of Operations.............................................................................................................................................................................................			96
Consolidated Statements of Comprehensive Income (Loss).............................................................................................................................................................			97
Consolidated Statements of Cash Flows...........................................................................................................................................................................................			98
Consolidated Statements of Changes in Proprietary Capital.............................................................................................................................................................			99
Notes to Consolidated Financial Statements.....................................................................................................................................................................................			100
Report of Independent Registered Public Accounting Firm (PCAOB ID 42) ......................................................................................................................................			156

Table of Contents



ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE...............................................................			158

ITEM 9A. CONTROLS AND PROCEDURES...............................................................................................................................................................................................			158
Disclosure Controls and Procedures..................................................................................................................................................................................................			158
Internal Control over Financial Reporting...........................................................................................................................................................................................			158
Report of Independent Registered Public Accounting Firm................................................................................................................................................................			159

ITEM 9B. OTHER INFORMATION................................................................................................................................................................................................................			160

ITEM 9C. DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS.....................................................................................................			160

PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS, AND CORPORATE GOVERNANCE.............................................................................................................................			161
Directors..............................................................................................................................................................................................................................................			161
Executive Officers...............................................................................................................................................................................................................................			162
Disclosure and Financial Code of Ethics............................................................................................................................................................................................			164
Insider Trading Policy.........................................................................................................................................................................................................................			164
Committees of the TVA Board............................................................................................................................................................................................................			164

ITEM 11. EXECUTIVE COMPENSATION.....................................................................................................................................................................................................			165
Compensation Discussion and Analysis.............................................................................................................................................................................................			165
CEO Pay Ratio Disclosure.................................................................................................................................................................................................................			201
Executive Compensation Tables and Narrative Disclosures..............................................................................................................................................................			207
Director Compensation.......................................................................................................................................................................................................................			220
Compensation Committee Interlocks and Insider Participation..........................................................................................................................................................			221
Compensation Committee Report......................................................................................................................................................................................................			221

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS......................................			222

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE.........................................................................................			222
Director Independence.......................................................................................................................................................................................................................			222
Related Party Transactions................................................................................................................................................................................................................			222

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES......................................................................................................................................................................			224

PART IV

ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES.....................................................................................................................................................................			225

ITEM 16. FORM 10-K SUMMARY.................................................................................................................................................................................................................			228

SIGNATURES................................................................................................................................................................................................................................................			229

Table of Contents


GLOSSARY OF COMMON ACRONYMS
Following are definitions of some of the terms or acronyms that may be used in this Annual Report on Form 10-K for the fiscal year ended September 30, 2023 (the "Annual Report"):

Term or Acronym						Definition
ACE						Affordable Clean Energy
ACPA						Anti-Cherrypicking Amendment

AOCI						Accumulated other comprehensive income (loss)
ARO						Asset retirement obligation
ART						Asset Retirement Trust
Bonds						Bonds, notes, or other evidences of indebtedness
CAA						Clean Air Act
CCR						Coal combustion residuals

CO2						Carbon dioxide
COVID-19						Coronavirus Disease 2019
COLA(s)						Cost-of-living adjustment(s)
CSAPR						Cross-State Air Pollution Rule
CTs						Combustion turbine unit(s)
CVA						Credit valuation adjustment
CWA						Clean Water Act
CY						Calendar year
DBOT						Down-blend offering for tritium
DCP						Deferred Compensation Plan
DEIA						Diversity, Equity, Inclusion, and Accessibility
DER						Distributed Energy Resources
DOE						Department of Energy
EIS						Environmental Impact Statement
ELGs						Effluent Limitation Guidelines

EO(s)						Executive Order(s)
EPA						Environmental Protection Agency
EPRI						Electric Power Research Institute
ERC						Enterprise Risk Council
FASB						Financial Accounting Standards Board
FERC						Federal Energy Regulatory Commission
FHP						Financial Hedging Program
FIP						Federal Implementation Plan
FPA						Federal Power Act

GAAP						Accounting principles generally accepted in the United States of America
GAC						Grid Access Charge
GHG						Greenhouse gas

IRP						Integrated Resource Plan
IwD						Inclusion with Diversity
JSCCG						John Sevier Combined Cycle Generation LLC


LPCs						Local power company customers



MD&A						Management's Discussion and Analysis of Financial Condition and Results of Operations
MLGW						Memphis Light, Gas and Water Division
mmBtu						Million British thermal unit(s)
MtM						Mark-to-market
MW						Megawatts
NAAQS						National Ambient Air Quality Standards

Table of Contents


NAV						Net asset value
NDT						Nuclear Decommissioning Trust
NEIL						Nuclear Electric Insurance Limited
NEPA						National Environmental Policy Act
NERC						North American Electric Reliability Corporation
NES						Nashville Electric Service
NOx						Nitrogen oxides
NPDES						National Pollutant Discharge Elimination System
NRC						Nuclear Regulatory Commission
NYSE						New York Stock Exchange


PARRS						Putable Automatic Rate Reset Securities

QTE						Qualified technological equipment and software
RCRA						Resource Conservation and Recovery Act
RECs						Renewable Energy Certificates
RFP						Request For Proposal
RP						Restoration Plan
SCCG						Southaven Combined Cycle Generation LLC
SCRs						Selective catalytic reduction systems
SEC						Securities and Exchange Commission
SERP						Supplemental Executive Retirement Plan
SHLLC						Southaven Holdco LLC
SIPs						State implementation plans
SMR						Small modular reactor(s)
SO2						Sulfur dioxide


TDEC						Tennessee Department of Environment & Conservation
TIPS						Treasury Inflation-Protected Securities
TPBAR						Tritium-producing burnable absorber rods
TVA Act						Tennessee Valley Authority Act of 1933, as amended
TVA Board						TVA Board of Directors
TVARS						Tennessee Valley Authority Retirement System
U.S. Treasury						United States Department of the Treasury
USACE						U.S. Army Corps of Engineers
VIE(s)						Variable interest entity(ies)
XBRL						eXtensible Business Reporting Language

Table of Contents

FORWARD-LOOKING INFORMATION

This Annual Report on Form 10-K for the fiscal year ended September 30, 2023 contains forward-looking statements relating to future events and future performance. All statements other than those that are purely historical may be forward-looking statements. In certain cases, forward-looking statements can be identified by the use of words such as "may," "will," "should," "expect," "anticipate," "believe," "intend," "project," "plan," "predict," "assume," "forecast," "estimate," "objective," "possible," "probably," "likely," "potential," "speculate," "aim," "aspiration," "goal," "seek," "strategy," "target," the negative of such words, or other similar expressions.

Although the Tennessee Valley Authority ("TVA") believes that the assumptions underlying any forward-looking statements are reasonable, TVA does not guarantee the accuracy of these statements. Numerous factors could cause actual results to differ materially from those in any forward-looking statements. These factors include, among other things:

•New, amended, or existing laws, regulations, executive orders ("EOs"), or administrative orders or interpretations, including those related to climate change and other environmental matters, and the costs of complying with these laws, regulations, EOs, or administrative orders or interpretations;

•The cost of complying with known, anticipated, or new environmental requirements, some of which could render continued operation of many of TVA's aging coal-fired generation units not cost-effective or result in their removal from service, perhaps permanently;

•Federal legislation aimed specifically at curtailing TVA's activities, including legislation that may cause TVA to lose its protected service territory, its sole authority to set rates, or its authority to manage the Tennessee River system or the real property currently entrusted to TVA; subject TVA to additional environmental regulation or additional requirements of the North American Electric Reliability Corporation ("NERC") or Federal Energy Regulatory Commission ("FERC"); require the divestiture of TVA or the sale of certain of TVA's assets; lower the debt ceiling on bonds, notes, or other evidences of indebtedness (collectively, "Bonds") specified in the Tennessee Valley Authority Act of 1933, as amended, ("TVA Act"); or restrict TVA's access to its funds;

•Cyber attacks on TVA's assets or the assets of third parties upon which TVA relies;

•The failure of TVA's information technology systems;

•Significant delays and additional costs, and/or inability to obtain necessary regulatory approvals, licenses, or permits, for major projects, including for assets that TVA needs to serve its existing and future load and to meet its carbon reduction aspirations;

•Limitations on TVA's ability to borrow money, which may result from, among other things, TVA's approaching or substantially reaching the debt ceiling or TVA's losing access to the debt markets, and which may impact TVA's ability to make planned capital investments;

•Events at a nuclear facility, whether or not operated by or licensed to TVA, which, among other things, could lead to increased regulation or restriction on the construction, ownership, operation, or decommissioning of nuclear facilities or on the storage of spent fuel, obligate TVA to pay retrospective insurance premiums, reduce the availability and affordability of insurance, increase the costs of operating TVA's existing nuclear units, or cause TVA to forego future construction at these or other facilities;

•Risks associated with the operation of nuclear facilities or other generation and related facilities, including coal combustion residuals ("CCR") facilities;

•Inability to continue to operate certain assets, especially nuclear facilities, including due to the inability to obtain, or loss of, regulatory approval for the operation of assets;

•Significant additional costs for TVA to manage and operate its CCR facilities;

•Physical attacks, threats, or other interference causing damage to TVA's facilities or interfering with TVA's operations;

•The failure of TVA's generation, transmission, navigation, flood control, and related assets and infrastructure, including CCR facilities and spent nuclear fuel storage facilities, to operate as anticipated, resulting in lost revenues, damages, or other costs that are not reflected in TVA's financial statements or projections, including due to aging or technological issues;

•Costs or liabilities that are not anticipated in TVA's financial statements for third-party claims, natural resource damages, environmental cleanup activities, or fines or penalties associated with unexpected events such as failures of a facility or infrastructure;

•Events at a TVA facility, which, among other things, could result in loss of life, damage to the environment, damage to or loss of the facility, or damage to the property of others;

•Events that negatively impact TVA's reliability, including problems at other utilities or at TVA facilities or the increase in intermittent sources of power;

•Events or changes involving transmission lines, dams, and other facilities not operated by TVA, including those that affect the reliability of the interstate transmission grid of which TVA's transmission system is a part and those that increase flows across TVA's transmission grid;

•Disruption of supplies of fuel, purchased power, or other critical items or services, which may result from, among other things, economic conditions, weather conditions, physical or cyber attacks, political developments, international trade restrictions or tariffs, legal actions, mine closures or reduced mine production, increases in fuel exports, environmental regulations affecting TVA's suppliers, transportation or delivery constraints, shortages of raw materials, supply chain difficulties, labor shortages, strikes, inflation, or similar events and which may, among other things, hinder TVA's ability to operate its assets and to complete projects on time and on budget;

Table of Contents

•Circumstances that cause TVA to change its determinations regarding the appropriate mix of generation assets;

•Costs or other challenges resulting from a failure by TVA to meet its carbon reduction aspirations;

•Actions taken, or inaction, by the United States ("U.S.") government relating to the national debt ceiling or automatic spending cuts in government programs;

•Inability to respond quickly enough to current or potential customer demands or needs or to act solely in the interest of ratepayers;

•Negative outcomes of current or future legal or administrative proceedings;

•Other unforeseeable occurrences negatively impacting TVA assets or their supporting infrastructure;

•The need for significant future contributions associated with TVA's pension plans, other post-retirement benefit plans, or health care plans;

•Increases in TVA's financial liabilities for decommissioning its nuclear facilities and retiring other assets;

•The requirement or decision to make additional contributions to TVA's Nuclear Decommissioning Trust ("NDT") or Asset Retirement Trust ("ART");

•Differences between estimates of revenues and expenses and actual revenues earned and expenses incurred;

•An increase in TVA's cost of capital, which may result from, among other things, changes in the market for Bonds, disruptions in the banking system or financial markets, changes in the credit rating of TVA or the U.S. government, or, potentially, an increased reliance by TVA on alternative financing should TVA approach its debt limit;

•The inaccuracy of certain assumptions about the future, including economic forecasts, anticipated energy and commodity prices, cost estimates, construction schedules, power demand forecasts, the appropriate generation mix to meet demand, and assumptions about potential regulatory environments;

•Significant decline in the demand for electricity that TVA produces, which may result from, among other things, economic downturns or recessions, loss of customers, reductions in demand for electricity generated from non-renewable sources or centrally located generation sources, increased utilization of distributed energy resources, increased energy efficiency and conservation, or improvements in alternative generation and energy storage technologies;

•Changes in customer preferences for energy produced from cleaner generation sources;

•Addition or loss of customers by TVA or TVA's local power company customers ("LPCs");

•Potential for increased demand for energy resulting from, among other things, an increase in the population of TVA's service area;

•Changes in technology, which, among other things, may affect relationships with customers and require TVA to change how it conducts its operations;

•Changes in the economy and volatility in financial markets;

•Reliability or creditworthiness of counterparties including but not limited to customers, suppliers, renewable resource providers, and financial institutions;

•Changes in the market price of commodities such as purchased power, coal, uranium, natural gas, fuel oil, crude oil, construction materials, reagents, or emission allowances;

•Changes in the market price of equity securities, debt securities, or other investments;

•Changes in interest rates, currency exchange rates, or inflation rates;

•Failure to attract or retain an appropriately qualified, diverse, and inclusive workforce;

•Changes in the membership of the TVA Board of Directors ("TVA Board") or TVA senior management, which may impact how TVA operates;

•Weather conditions, including changing weather patterns, extreme weather conditions, and other events such as flooding, droughts, wildfires, heat waves, and snow or ice storms that may result from climate change, which may hamper TVA's ability to supply power, cause customers' demand for power to exceed TVA's then-present power supply, or otherwise negatively impact net revenue;

•Events affecting the supply or quality of water from the Tennessee River system or Cumberland River system, or elsewhere, which could interfere with TVA's ability to generate power;

•Catastrophic events, such as fires, earthquakes, explosions, solar events, electromagnetic pulses, geomagnetic disturbances, droughts, floods, hurricanes, tornadoes, polar vortexes, icing events, pipeline explosions, or other casualty events, wars, national emergencies, terrorist activities, pandemics, widespread public health crises, geopolitical events, or other similar destructive or disruptive events;

•Inability to use regulatory accounting for certain costs;

•Ineffectiveness of TVA's financial control system to control issues and instances of fraud or to prevent or detect errors;

•Ineffectiveness of TVA's disclosure controls and procedures or its internal control over financial reporting;

•Adverse effects from regional health emergencies;

•Inability of TVA to implement its business strategy successfully, including due to the increased use in the public of distributed energy resources or energy-efficiency programs;

•Inability of TVA to adapt its business model to changes in the utility industry and customer preferences and to remain cost competitive;

•Inability of TVA to achieve or maintain its cost reduction goals, which may require TVA to increase rates and/or issue more debt than planned;

•The emergence of artificial intelligence and its potential application to various business practices, including TVA's operations and the operations of TVA's stakeholders;

•Loss of quorum of the TVA Board, which may limit TVA's ability to adapt to meet changing business conditions;

•Negative impacts on TVA's reputation; or

Table of Contents

•Other unforeseeable events.

See also Part I, Item 1A, Risk Factors, and Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations for a discussion of factors that could cause actual results to differ materially from those in any forward-looking statement. New factors emerge from time to time, and it is not possible for TVA to predict all such factors or to assess the extent to which any factor or combination of factors may impact TVA's business or cause results to differ materially from those contained in any forward-looking statement. TVA undertakes no obligation to update any forward-looking statement to reflect developments that occur after the statement is made, except as required by law.

GENERAL INFORMATION

Fiscal Year

References to years (2023, 2022, etc.) in this Annual Report on Form 10-K for the fiscal year ended September 30, 2023 are to TVA's fiscal years ending September 30 except for references to years in the biographical information about directors and executive officers in Part III, Item 10, Directors, Executive Officers, and Corporate Governance, as well as to years that are preceded by "CY," which references are to calendar years.

Notes

References to "Notes" are to the Notes to Consolidated Financial Statements contained in Part II, Item 8, Financial Statements and Supplementary Data in this Annual Report.

Property

TVA does not own real property and generally does not own real property interests (collectively, "real property"). TVA acquires real property in the name of the United States ("U.S."), and such legal title in real property is entrusted to TVA as the agent of the U.S. to accomplish the purposes of the TVA Act. TVA acquires personal property in the name of TVA. Accordingly, unless the context indicates the reference is to TVA's personal property, any statement in this Annual Report referring to TVA property shall be read as referring to the real property of the U.S. that has been entrusted to TVA as its agent.

Available Information

TVA files annual, quarterly, and current reports with the Securities and Exchange Commission ("SEC") under Section 37 of the Securities Exchange Act of 1934 (the "Exchange Act"). TVA's SEC filings are available to the public at www.tva.com, free of charge, as soon as reasonably practicable after such reports are electronically filed with or furnished to the SEC. Information contained on or accessible through TVA's website shall not be deemed to be incorporated into, or to be a part of, this Annual Report or any other report or document that TVA files with the SEC. All TVA SEC reports are available to the public without charge from the website maintained by the SEC at https://www.sec.gov.

Table of Contents

PART I

ITEM 1. BUSINESS

The Corporation

General

The Tennessee Valley Authority ("TVA") is a corporate agency and instrumentality of the United States ("U.S.") that was created in 1933 by federal legislation in response to a proposal by President Franklin D. Roosevelt. TVA was created to, among other things, improve navigation on the Tennessee River, reduce the damage from destructive flood waters within the Tennessee River system and downstream on the lower Ohio and Mississippi Rivers, further the economic development of TVA's service area in the southeastern U.S., and sell the electricity generated at the facilities TVA operates. Today, TVA operates the nation's largest public power system and supplies power to a population of approximately 10 million people.

TVA also manages the Tennessee River, its tributaries, and certain shorelines to provide, among other things, year-round navigation, flood damage reduction, and affordable and reliable electricity. Consistent with these primary purposes, TVA also manages the river system and public lands to provide recreational opportunities, adequate water supply, improved water quality, cultural and natural resource protection, and economic development. TVA performs these management duties in cooperation with other federal and state agencies that have jurisdiction and authority over certain aspects of the river system. In addition, the TVA Board of Directors ("TVA Board") has established two councils — the Regional Resource Stewardship Council and the Regional Energy Resource Council — to advise TVA on its stewardship activities in the Tennessee Valley and its energy resource activities.

Initially, all TVA operations were funded by federal appropriations. Direct appropriations for the TVA power program ended in 1959, and appropriations for TVA's stewardship, economic development, and multipurpose activities ended in 1999. Since 1999, TVA has funded all of its operations almost entirely from the sale of electricity and power system financings. TVA's power system financings consist primarily of the sale of bonds, notes, or other evidences of indebtedness (collectively, "Bonds") and secondarily of alternative forms of financing, such as lease arrangements. As a wholly-owned government corporation, TVA is not authorized to issue equity securities.

TVA's Mission of Service

TVA was built for the people, created by federal legislation, and charged with a unique mission - to improve the quality of life in a seven-state region through the integrated management of the region's resources. TVA's mission focuses on three key areas:

•Energy — Delivering reliable, low cost, clean energy;

•Environment — Caring for the region's natural resources; and

•Economic Development — Creating sustainable economic growth.

TVA's Strategic Priorities

While TVA's mission has not changed since it was established in 1933, the climate in which TVA operates continues to evolve. To continue to deliver its mission of service while evolving for future success, TVA must realize five strategic priorities:

•People Advantage — Amplifying the energy, passion, and creativity within each TVA employee;

•Operational Excellence — Building on TVA's best-in-class reputation for reliable service and competitively priced power;

•Financial Strength — Investing in the future, while keeping energy costs as low as possible;

•Powerful Partnerships — Promoting progress through the shared success of TVA's customers and stakeholders; and

•Igniting Innovation — Pursuing innovative solutions for TVA and its customers and communities.

Table of Contents

Service Area

TVA's service area, the area in which it sells power, is defined by the Tennessee Valley Authority Act of 1933, as amended ("TVA Act"). TVA supplies power in most of Tennessee, northern Alabama, northeastern Mississippi, and southwestern Kentucky, and in portions of northern Georgia, western North Carolina, and southwestern Virginia. Under the TVA Act, subject to certain minor exceptions, TVA may not, without the enactment of authorizing federal legislation, enter into contracts that would have the effect of making it, or the wholesale customers that distribute TVA power ("local power company customers" or "LPCs"), a source of power supply outside the area for which TVA or its LPCs were the primary source of power supply on July 1, 1957. This provision is referred to as the "fence" because it bounds TVA's sales activities, essentially limiting TVA to power sales within a defined service area.

Note

In addition to the locations above, TVA owns approximately one megawatt ("MW") of nameplate capacity among nine operating solar installations across the Tennessee Valley region with six installations in Tennessee, two in Alabama, and one in Mississippi. See Power Supply and Load Management Resources for a description of all of TVA's power supply resources.

In addition, the Federal Power Act ("FPA") includes a provision that helps protect TVA's ability to sell power within its service area. This provision, called the "anti-cherrypicking" provision, prevents the Federal Energy Regulatory Commission ("FERC") from ordering TVA to provide access to its transmission lines to others to deliver power to customers within TVA's defined service area. As a result, the anti-cherrypicking provision reduces TVA's exposure to loss of its customers. However, there have been some efforts to circumvent the anti-cherrypicking provision, and the protection of the provision could be limited and perhaps eliminated by federal legislation at some time in the future. See Competition and Item 1A, Risk Factors — Regulatory, Legislative, and Legal Risks — TVA could lose its protected service territory.

In 2023, the revenues generated from TVA's electricity sales were $11.9 billion and accounted for virtually all of TVA's revenues. See Note 17 — Revenue for details regarding revenues by state for each of the last three years.

Table of Contents

Customers

TVA is primarily a wholesaler of power, selling power to LPCs that then resell power to their customers at retail rates. TVA's LPCs consist of (1) municipalities and other local government entities ("municipalities") and (2) customer-owned entities ("cooperatives"). These municipalities and cooperatives operate public power electric systems whose primary purpose is not to make a profit but to supply electricity to the general public or the cooperatives' members. TVA also sells power directly to certain end-use customers, primarily large commercial and industrial loads and federal agencies with loads larger than 5,000 kilowatts. Whether TVA or an LPC serves a new power customer is determined by the applicable TVA-LPC wholesale power contract. Each contract contains a formula that balances the size of the LPC and the amount of any TVA infrastructure investment to determine which party is entitled to serve the new customer. In addition, power in excess of the needs of the TVA system may, where consistent with the provisions of the TVA Act, be sold under exchange power arrangements with other specific electric systems. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Results of Operations — Financial Results — Operating Revenues and Note 17 — Revenue for details regarding TVA's operating revenues.

Local Power Company Customers

Revenues from LPCs accounted for approximately 91 percent of TVA's total operating revenues for 2023. TVA had wholesale power contracts with 153 LPCs at September 30, 2023. Each of these contracts requires the LPC to purchase from TVA all of the electric power required for service to the LPC's customers; however, Power Supply Flexibility Agreements available to LPCs that have executed long-term Partnership Agreements with TVA allow LPCs to locally generate or purchase up to approximately five percent of their average total hourly energy sales over a certain time period in order to meet their individual customers' needs. Revised flexibility agreements were made available to LPCs in August 2023 which permit projects to be located anywhere in TVA's service area, either connected to the LPC distribution system or TVA's transmission system, and makes it easier for LPCs to partner in projects. As of September 30, 2023, 89 LPCs had signed a Power Supply Flexibility Agreement. LPCs purchase power under contracts with terms of five or 20 years to terminate.

TVA's two largest LPCs — Memphis Light, Gas and Water Division ("MLGW") and Nashville Electric Service ("NES") — have contracts with a five-year and a 20-year termination notice period, respectively. Sales to MLGW and NES accounted for nine percent and eight percent, respectively, of TVA's total operating revenues for 2023.

TVA and LPCs continue to work together to meet the changing needs of consumers around the Tennessee Valley. TVA has a Partnership Agreement option that better aligns the length of LPC power contracts with TVA's long-term commitments. Under the partnership arrangement, the LPC power contracts automatically renew each year and have a 20-year termination notice. The partnership arrangements can be terminated under certain circumstances, including TVA's failure to limit rate increases as provided for in the agreements going forward. Participating LPCs receive benefits including a 3.1 percent wholesale bill credit in exchange for their long-term commitment, which enables TVA to recover its long-term financial commitments over a commensurate period. As of September 30, 2023, 147 LPCs had signed the Partnership Agreement with TVA.

The power contracts between TVA and LPCs provide for the purchase of power by LPCs at the wholesale rates established by the TVA Board. Under the TVA Act, the TVA Board is authorized to regulate LPCs to carry out the purposes of the TVA Act through contract terms and conditions as well as through rules and regulations. TVA regulates LPCs primarily through the provisions of TVA's wholesale power contracts. All of the power contracts between TVA and the LPCs require that power purchased from TVA be sold and distributed to the ultimate consumer without discrimination among consumers of the same class and prohibit direct or indirect discriminatory rates, rebates, or other special concessions. In addition, there are a number of wholesale power contract provisions through which TVA seeks to ensure that the electric system revenues of the LPCs are used only for electric system purposes. Furthermore, almost all of these contracts specify the resale rates and charges at which the LPC must resell TVA power to its customers. These rates are revised from time to time, subject to TVA approval, to reflect changes in costs, including changes in the wholesale cost of power.

TVA also regulates LPC policies for customer deposits, termination of service for non-payment, providing information to consumers, and billing through a service practice policy framework. TVA's regulatory framework provides for consistent regulatory policy for ratepayers across the Tennessee Valley, while recognizing local considerations. The regulatory provisions in TVA's wholesale power contracts are designed to carry out the objectives of the TVA Act, including the objective of providing for an adequate supply of power at the lowest feasible rates. See Rates — Rate Methodology below.

Other Customers

Revenues from directly served industrial customers accounted for approximately seven percent of TVA's total operating revenues in 2023. Contracts with these customers are subject to termination by the customer or TVA upon a minimum notice period that varies according to a number of factors, including the customer's contract demand and the period of time service has been provided. TVA also serves seven federal customers, including U.S. Department of Energy ("DOE") facilities and military installations, which accounted for approximately one percent of TVA's total operating revenues in 2023.

Table of Contents

Other Revenue

Other revenue consists primarily of wheeling and network transmission charges, sales of excess steam that is a by-product of power production, delivery point charges for interconnection points between TVA and the customer, Renewable Energy Certificate ("REC") sales, and certain other ancillary goods or services. Other revenue accounted for approximately one percent of TVA's total operating revenues in 2023.

Rates

Rate Authority

The TVA Act gives the TVA Board sole responsibility for establishing the rates TVA charges for power. These rates are not subject to judicial review or to review or approval by any state or other federal regulatory body. Under the TVA Act, TVA is required to charge rates for power that will produce gross revenues sufficient to provide funds for:

•Operation, maintenance, and administration of its power system;

•Payments to states and counties in lieu of taxes ("tax equivalents");

•Debt service on outstanding indebtedness;

•Payments to the United States Department of the Treasury ("U.S. Treasury") in repayment of and as a return on the government's appropriation investment in TVA's power facilities (the "Power Program Appropriation Investment"); and

•Such additional margin as the TVA Board may consider desirable for investment in power system assets, retirement of outstanding Bonds in advance of their maturity, additional reduction of the Power Program Appropriation Investment, and other purposes connected with TVA's power business, having due regard for the primary objectives of the TVA Act, including the objective that power shall be sold at rates as low as are feasible. See Note 23 — Related Parties.

TVA fulfilled its requirement to repay $1.0 billion of the Power Program Appropriation Investment in 2014; therefore, the repayment of this amount is no longer a component of rate setting.

Rate Methodology

TVA uses a seasonal time of use wholesale rate structure comprised of base demand and energy rates, a fuel rate, and a grid access charge ("GAC"). In setting the base rates, TVA uses a debt-service coverage methodology to derive annual revenue requirements in a manner similar to that used by other public power entities that also use the debt-service coverage rate methodology. Under the debt-service coverage methodology, rates are calculated so that an entity will be able to cover its operating costs and to satisfy its obligations to pay principal and interest on debt, plus an additional margin. This ratemaking approach is particularly suitable for use by entities financed primarily, if not entirely, by debt, such as TVA, and helps ensure that TVA produces gross revenues sufficient to fund requirements specified in the TVA Act listed under Rate Authority above. TVA's rate structure includes a focus on TVA's long-term pricing by aligning rates with underlying cost drivers.

TVA recovers fuel costs and tax equivalent payments associated with fuel cost adjustments through a monthly rate reflecting the forecasted costs of fuel. Fuel costs are allocated to three groups of customers: (1) Standard Service (residential and small commercial customers), (2) large general service customers with contract demands greater than 5 MW, and (3) large manufacturing customers with contract demands greater than 5 MW. Fuel costs are allocated to these three classes of customers in relation to their hourly loads and TVA's hourly incremental dispatch cost. Total monthly fuel costs include costs for natural gas, fuel oil, coal, purchased power, emission allowances, nuclear fuel, and other fuel-related commodities as well as realized gains and losses on derivatives purchased to hedge the costs of such commodities.

Power Supply and Load Management Resources

General

TVA seeks to balance production capabilities with power supply requirements by promoting the conservation and efficient use of electricity and, when necessary, buying, building, or leasing assets or entering into power purchase agreements ("PPAs"). TVA also seeks to employ a diverse mix of energy generating sources and works toward obtaining greater amounts of its power supply from clean (low or zero carbon-emitting) resources.

TVA is making investments in its generating portfolio and infrastructure to modernize the fleet and help meet growing demand for electricity while also allowing TVA to maintain competitive rates and high reliability and work toward an increasingly clean power system. As TVA continues to evaluate the impact of retiring its coal-fired fleet by 2035 and works to accelerate the growth of renewables, it also continues to evaluate adding flexible lower carbon-emitting gas plants as a strategy to maintain reliability. Commercial plant operations began on Colbert Combustion Turbine Units 9-11 in July 2023, and TVA has ongoing gas projects at TVA’s Paradise, Johnsonville, and Cumberland sites. In addition, TVA is committed to investing in the future of nuclear with the evaluation of emerging advanced nuclear technologies, such as small modular reactors ("SMRs"), while also

Table of Contents

investing in its existing nuclear assets and working to renew its nuclear generation fleet licenses. TVA has been implementing the Hydro Life Extension Program with a focus on improving the availability and flexibility of the hydroelectric fleet and exploring new hydroelectric pumped-storage power to support the grid. It is also investing in research and development for technology around hydrogen fuel and carbon capture, utilization, and storage. In 2022, the Inflation Reduction Act of 2022 ("Inflation Reduction Act") was signed into law, which makes certain tax-exempt entities, including TVA, eligible for a direct-pay option for certain tax credits that encourage investment in clean energy, in some circumstances. TVA is currently exploring funding opportunities of various types, including opportunities involving pumped-storage, solar, carbon capture, hydrogen, and transmission, among others; however, this exploration does not guarantee that TVA or its partners will receive any funds. See Research and Development below, Item 1A, Risk Factors — Operational Risks, and Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Optimum Energy Portfolio.

Power generating facilities operated by TVA at September 30, 2023, included three nuclear sites, 17 natural gas and/or oil-fired sites, four coal-fired sites, 29 conventional hydroelectric sites, one pumped-storage hydroelectric site, one diesel generator site, and nine operating solar installations. See Item 2, Properties — Generating Properties — Net Capability for a discussion of the units at these facilities. TVA also acquires power under PPAs of varying durations, including short-term contracts of less than 24-hours in duration. See Power Purchase and Other Agreements below.

The following table shows TVA's generation and purchased power by generating source as a percentage of all electric power generated and purchased (based on kilowatt hours ("kWh")) for the periods indicated:


Total Power Supply by Generating Source For the years ended September 30
Generation Resource(1)	2023	2022	2021
Nuclear	42%	39%	41%
Natural gas and/or oil-fired	22%	22%	21%
Coal-fired	13%	13%	15%
Hydroelectric	8%	8%	10%
Purchased power	15%	18%	13%

Note

(1) TVA's non-hydro renewable resources from TVA facilities are less than one percent for all periods shown, and therefore are not represented on the table above. Purchased power contains the majority of non-hydro renewable energy supply. TVA sells the RECs resulting from some of its purchased power to certain customers. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Optimum Energy Portfolio — Renewable Power Purchase Agreements.

While TVA continues down the path of reducing power generation from carbon-emitting sources, there will be fluctuations in usage due to electricity demands. Also, TVA continues to make operational decisions to keep the system reliable and to deliver low-cost energy.

Nuclear

At September 30, 2023, TVA had three nuclear sites consisting of seven units in operation. The units at Browns Ferry Nuclear Plant ("Browns Ferry") are boiling water reactor units, and the units at Sequoyah Nuclear Plant ("Sequoyah") and Watts Bar Nuclear Plant ("Watts Bar") are pressurized water reactor units. Operating information for each of these units is included in the table below.


TVA Nuclear Power At September 30, 2023
Nuclear Unit	Summer Net Capability (MW)	Net Capacity Factor for 2023 (%)	Date of Expiration of Operating License
Browns Ferry Unit 1	1,227	90.0	2033
Browns Ferry Unit 2	1,208	89.2	2034
Browns Ferry Unit 3	1,227	90.3	2036
Sequoyah Unit 1	1,152	88.0	2040
Sequoyah Unit 2	1,140	89.4	2041
Watts Bar Unit 1	1,157	88.0	2035
Watts Bar Unit 2	1,121	100.0	2055

Nuclear Fleet License Extensions. TVA is seeking to renew all nuclear generation units' licenses for an additional 20 years. The first license renewal application is expected to be submitted to the Nuclear Regulatory Commission ("NRC") in January 2024 for the three units at Browns Ferry. See Part II, Item 7, Management's Discussion and Analysis of Financial

Table of Contents

Condition and Results of Operations — Key Initiatives and Challenges — Optimum Energy Portfolio — Nuclear Fleet License Extensions.

Other Nuclear Initiatives. TVA has an Early Site Permit to potentially construct and operate SMRs at TVA's Clinch River Nuclear Site in Oak Ridge, Tennessee, and in 2022, the TVA Board approved a programmatic approach to exploring advanced nuclear technology (the "New Nuclear Program"). See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Optimum Energy Portfolio — Small Modular Reactors.

Other Nuclear Matters. Operating nuclear facilities subjects TVA to waste disposal, decommissioning, and insurance requirements, as well as litigation risks. See Fuel Supply — Nuclear Fuel below for a discussion of spent nuclear fuel and low-level radioactive waste and Note 22 — Commitments and Contingencies — Contingencies for a discussion of TVA's nuclear decommissioning liabilities and the related trust and nuclear insurance, which discussions are incorporated herein by reference.

Natural Gas and/or Oil-Fired

At September 30, 2023, TVA's natural gas and oil-fired fleet consisted of 104 combustion turbine power blocks (84 simple-cycle units, one cogeneration unit, and 14 combined-cycle power units, accounting for 12,638 MW of summer net capability, and five idled units at Allen Combustion Turbine Facility: Units 2, 3, 11, 17, and 18). Sixty-five of the simple-cycle units are currently capable of quick-start response allowing full generation capability in approximately 10 minutes. The economic dispatch of natural gas-fired plants depends on both the day-to-day price of natural gas and the price of other available intermediate resources such as coal-fired plants. TVA uses simple-cycle units to meet peaking or backup power needs. As TVA evaluates the retirement of its coal-fired fleet and works to accelerate the growth of renewables, it also continues to evaluate adding flexible lower carbon-emitting gas plants as a strategy to maintain reliability. The natural gas-fired fleet supports renewable expansion by providing reliability across all hours, as well as the flexibility to help manage ramping and intermittency. Commercial plant operations began on Colbert Combustion Turbine Units 9-11 on July 25, 2023. Pre-commercial plant operations began on Paradise Combustion Turbine Units 5-7 in the first quarter of 2024, and all three new units are anticipated to enter commercial operations by the end of calendar year ("CY") 2023. TVA has other ongoing projects at TVA's Johnsonville and Cumberland sites. TVA may decide to make further strategic investments in natural gas-fired facilities in the future by purchase, construction, or lease, to help support portfolio diversification and system reliability.

See Item 2, Properties — Generating Properties, Note 8 — Leases, Note 11 — Variable Interest Entities, and Note 14 — Debt and Other Obligations for a discussion of lease arrangements into which TVA has entered in connection with certain combustion turbine units ("CTs"). See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Optimum Energy Portfolio — Natural Gas-Fired Units for a discussion of ongoing projects at certain natural gas-fired facilities.

Coal-Fired

At September 30, 2023, TVA had four coal-fired plants consisting of 24 active units, accounting for 5,815 MW of summer net capability. TVA considers units to be in an active state when the unit is generating, available for service, or temporarily unavailable due to equipment failures, inspections, or repairs. In 2019, the TVA Board approved the retirement of Bull Run Fossil Plant ("Bull Run") by December 2023, and on September 30, 2023, the facility was retired.

Coal-fired plants have been subject to increasingly stringent regulatory requirements over the last few decades, including those under the Clean Air Act ("CAA"), the Clean Water Act ("CWA"), and the Resource Conservation and Recovery Act ("RCRA"). TVA has committed to a programmatic approach for the evaluation of its sites where coal combustion residuals ("CCR") are stored to meet all applicable state and federal regulations. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Coal Combustion Residuals — Coal Combustion Residuals Facilities.

TVA continues to work toward a balanced generation plan with greater reliance on lower-cost and cleaner energy generation technologies. Since September 30, 2010, TVA has reduced its summer net capability of coal-fired units by 8,418 MW. Following the publication of the 2019 Integrated Resource Plan ("IRP"), TVA conducted end-of-life evaluations of the remaining coal fleet to inform long-term planning. These evaluations confirmed that the aging coal fleet is among the oldest in the nation and is experiencing deterioration of material condition and performance challenges. The performance challenges are projected to increase due to the coal fleet’s advancing age and the difficulty of adapting the coal fleet’s generation within the changing generation profile. TVA is evaluating the impact of retiring the balance of the coal-fired fleet by 2035, and that evaluation includes environmental review, public input, and TVA Board approval. In January 2023, TVA issued its Record of Decision to retire the two coal-fired units at Cumberland Fossil Plant ("Cumberland") by the end of CY 2026 and CY 2028. Environmental reviews and the public input process evaluating the potential retirement of Kingston Fossil Plant ("Kingston") are underway. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Optimum Energy Portfolio.

Table of Contents

Diesel Generators

At September 30, 2023, TVA had one diesel generator plant consisting of five units, and this facility accounted for 9

MW of summer net capability. These units are not currently dispatched for generation to the transmission grid.

Hydroelectric Pumped-Storage

At September 30, 2023, TVA had four units at Raccoon Mountain Pumped-Storage Plant ("Raccoon Mountain") with a total net summer capability of 1,700 MW. These units are utilized to balance the transmission system as well as generate power. TVA uses electricity generated by its fleet during periods of low demand to operate pumps that fill the reservoir at Raccoon Mountain. Then, during periods of high or peak demand, the water is released and the pumps reverse to work as power generating turbines.

New hydroelectric pumped-storage is one of several technologies that TVA is exploring to ensure the reliability and resiliency of the grid, particularly as intermittent renewables like solar continue to be added to the generation mix. In 2023, TVA announced sites for a potential future pumped-storage facility. A programmatic environmental impact statement will rank these sites for overall favorability across a wide range of environmental, social, and technical factors. Early exploratory drilling has begun on the sites.

Renewable Energy Resources

As more consumers and businesses are seeking cleaner energy, the utility industry is evolving to meet those needs. As TVA also evolves, it will see impacts to the way it does business through the pricing of products, transmission of energy, and development of new products and services for its customers in support of changing customer preferences. Many companies are focusing on sustainability and requiring more energy efficiency and renewable energy options. In addition, TVA seeks to obtain greater amounts of its power supply from clean resources to work towards carbon emission reductions. As a result, TVA is working to increase its renewable energy portfolio, by investing in existing hydroelectric assets through the Hydro Life Extension Program, securing renewable PPAs, and exploring self-directed solar projects. TVA also encourages renewable power and offers renewable resources through various current programs and offerings, including the Green Invest Program which matches customer demand with renewable supply and is aimed to meet the needs of customers at scale. TVA issued a carbon-free request for proposal ("RFP") in 2022 for up to 5,000 MW of carbon-free and renewable energy projects, which included a broad range of potential generation sources. See Power Purchase and Other Agreements for information on TVA’s PPAs, including renewable agreements, and Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Optimum Energy Portfolio — Renewable Power Purchase Agreements for a discussion of TVA's RFPs.

Conventional Hydroelectric Dams. At September 30, 2023, TVA's hydroelectric fleet consisted of 29 conventional hydroelectric dams throughout the Tennessee River system with 106 active generating units that accounted for 3,739 MW of summer net capability. Wilbur Hydroelectric Facility Units 1-3 were in long-term outage and unavailable for service at September 30, 2023. The amount of electricity that TVA is able to generate from its hydroelectric plants depends on a number of factors, including the amount of precipitation and runoff, initial water levels, generating unit availability, and the need for water for competing water management objectives. When these factors are unfavorable, TVA must increase its reliance on higher cost generation plants and purchased power. In addition, TVA receives a portion of energy generated by eight of the U.S. Army Corps of Engineers ("USACE") dams on the Cumberland River system, and electric generation from the USACE dams is dependent on the same factors that affect generation from the TVA-owned dams. See Dam Safety Assurance Program and Weather and Seasonality below.

Hiwassee Hydro Unit 2 has a unique reversible turbine/generator that acts as a pump and a turbine enhancing TVA's ability to balance baseload generation. At September 30, 2023, Hiwassee Hydro Unit 2 accounted for 86 MW of the conventional hydroelectric summer net capability.

TVA's Hydro Life Extension Program began in 2021 with a focus on recovering and preserving TVA's extensive hydroelectric fleet, improving efficiency and flexibility, and ensuring long-term reliability of this vital clean energy asset. Hydroelectric generation will continue to be an important part of TVA's energy mix in the future. It plays a vital role in carbon reduction initiatives, the ability to integrate other renewables into the power portfolio, and TVA's ability to meet changing customer preferences for cleaner energy sources.

In January 2023, TVA signed a Memorandum of Understanding ("MOU") with the DOE to enhance collaboration on hydropower technology development. Joint efforts will focus on evaluating and demonstrating different approaches for operating hydropower plants to meet the electricity grid's changing needs.

Dam Safety Assurance Program. TVA has an established dam safety program, which includes procedures based on the Federal Guidelines for Dam Safety, with the objective of reducing the risk of a dam safety event. The program analyzes, evaluates, and manages risks through a systematic and thorough process that facilitates decision-making for the safety of a structure, identifying necessary actions to reduce risk, including remediation projects, and prioritization of actions for TVA's river

Table of Contents

dams. Prioritization is driven by reducing risk to the public and asset preservation. TVA also continues to provide routine care of the dams as part of the dam safety program through inspections, monitoring, and maintenance, among other activities.

Self-Directed Solar. During 2019, the TVA Board approved the opportunity for TVA to explore being directly involved in the development of a utility-scale solar project, contingent on the successful completion of environmental reviews under the National Environmental Policy Act ("NEPA") and other applicable laws. In 2021, TVA purchased land for this development, and in 2022, environmental reviews were complete. The challenges affecting the U.S. solar industry are also being seen in TVA's self-directed solar project. This has resulted in a delay in the estimated completion, with the project now expected to be complete by the end of CY 2027. The project has also experienced cost increases due to escalations from supply chain limitations.

In November 2022, the TVA Board approved the opportunity for TVA to explore the development of an additional utility-scale solar project, contingent on successfully completing environmental reviews under NEPA and other applicable laws and obtaining the necessary state permits. The project would utilize TVA-owned land, deploying a solar cap system on the closed CCR facility at the TVA Shawnee Fossil Plant in Paducah, Kentucky. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Optimum Energy Portfolio — Self-Directed Solar.

Other Renewable Energy Resources. In addition to the hydroelectric units above, TVA owns nine operating solar installations that account for approximately one MW of nameplate capacity. Other renewable energy resources also include renewable energy purchases, a majority associated with TVA renewable programs. See Power Purchase and Other Agreements for information on renewable PPAs. TVA's current renewable programs and offerings include:

Small-scale Solutions. The Green Connect Program connects residential customers who are interested in on-site solar photovoltaic ("PV") and/or battery storage systems with qualified solar and battery storage installers who agree to install to Green

Connect Program Standards. These qualified installers, who are members of TVA's Quality Contractor Network, are insured and

licensed and have also completed special training on TVA guidelines. Participants have access to objective information and the benefit of installation verifications with regard to whether their solar PV system has met the Green Connect Program Standards.

Utility-scale Solutions. The Green Invest Program matches customer demand with renewable supply through a Green Invest Agreement. The goal of the Green Invest Program is to meet the long-term sustainability needs of customers at scale. TVA procures the needed renewable supply through a diversified approach, which could include a competitive procurement process, strategic partnerships, or construction of renewable facilities to meet these needs. As of September 30, 2023, more than 2,000 MW of renewable PPAs have been matched to customers through the Green Invest Program. In addition, Generation Flexibility is a solution available to LPCs participating in TVA's Partnership Agreement and supports the deployment of up to 2,000 MW of distributed solar to provide clean, local generation. See Note 17 — Revenue.

Other Renewable Solutions. The Green Switch Program allows customers to support solar renewable resources through purchasing renewable solar energy generated in the Tennessee Valley. The product is sold in blocks of 200 kWh or matches 100 percent of a customer's electricity usage (available through select LPCs). During the year ended September 30, 2023, participants purchased 91,268 MWh through the Green Switch Program. The Green Flex Program gives commercial and industrial customers the ability to meet sustainability goals and to make renewable energy claims through RECs from wind generation located outside TVA's service area. During the year ended September 30, 2023, participants purchased approximately 650,000 RECs through the Green Flex Program.

TVA tracks its renewable energy commitments and claims through the management of RECs. The RECs, which each represent one megawatt-hour ("MWh") of renewable energy generation, are principally associated with wind, solar, biomass, and low-impact hydroelectric. TVA continues to evaluate ways to adjust to customer preferences and requirements for cleaner and greener energy, including the acquisition of RECs from renewable purchased power that can be sold to customers to meet their needs. Overall, TVA will procure needed renewable supply through a diversified approach, which could include a competitive procurement process, strategic partnerships, or construction of renewable facilities to meet these needs.

Table of Contents

Total Renewable Energy Resources. As of September 30, 2023, TVA's total renewable energy resources amounted to 8,668 MW. Of this amount, 6,801 MW are operating while 1,867 MW are contracted but not yet online. In addition, TVA has 299 MW from self-directed solar projects currently under development.

Notes

(1) Contracted resources are executed PPAs expected to come online at a future date.

(2) Hydroelectric power consists of 3,739 MW from TVA-owned conventional hydroelectric facilities and 779 MW from renewable PPAs.

(3) TVA sells the RECs resulting from some of its purchased power to certain customers. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Optimum Energy Portfolio — Renewable Power Purchase Agreements.

TVA's operating renewables by location and by source are detailed below:

Notes

(1) In-Valley refers to the renewable energy that is sourced within TVA's service territory. Out-of-Valley refers to the renewable energy that is sourced outside of TVA's service territory and solely consists of wind power.

(2) See Power Purchase and Other Agreements below. PPAs also include capability from various historical renewable energy programs primarily with individuals and small businesses.

Distributed Energy Resources

Consumer desire for energy choice, among other things, is driving the expectation for flexible options in the electric industry. TVA and LPCs are working together to leverage the strengths of the Tennessee Valley public power model to provide distributed energy solutions that are economical, sustainable, and flexible. TVA will focus on the safety and reliability impacts of these resources as they are interconnected to the grid and will aim to ensure that the pricing of electricity remains as low as feasible. Additional regulatory considerations and analysis may be required as the distributed energy resources ("DER") market, technologies, and programs evolve.

Table of Contents

In 2017, the TVA Board authorized up to $300 million to be spent over the next 10 years, subject to annual budget availability and necessary environmental reviews, to build an enhanced fiber optic network that will better connect TVA's operational assets. Fiber is a vital part of TVA's modern communication infrastructure and is needed to help manage DER as they enter the market. The new fiber optic lines will also improve the reliability and resiliency of the generation and transmission system. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Optimum Energy Portfolio — Fiber Optic Network.

New energy management systems and energy storage technologies present opportunities for more sophisticated and integrated operation of the entire grid. The advent of electric vehicles and small-scale renewable generation has hastened the development of energy storage technologies that have the potential to mitigate the intermittent supply issues associated with many renewable generation options. Implementation of these technologies in conjunction with two-way communication to the site creates the potential for more efficient usage of other DER on the grid.

TVA is partnering with LPCs and others to support the electrification of transportation in the Tennessee Valley in a multi-year EV initiative. The initiative focuses on reducing or eliminating EV market barriers with EV policies, improving charging infrastructure availability, expanding EV availability and offerings, and spreading EV consumer awareness. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Electric Vehicles.

On-site energy management technologies and the proliferation of companies interested in providing services to support and aggregate the impacts of such systems provide another DER opportunity. Such systems can afford the consumer benefits through reduced consumption, increased comfort, detailed energy use data, and savings from time-sensitive rate structures. TVA and LPCs must consider the integration of the impacts from changes in energy usage patterns resulting from the operation of such systems.

Demand response systems that take advantage of the increasing sophistication in communication to homes, businesses, and distribution system assets also afford the opportunity for more granular control of system demand. Technologies can manage individual customer systems to shift usage from peak to off-peak periods and create significant reductions in the need for peak generation output or curtail usage for short periods to balance system demand. More sophisticated distribution control systems can also lower peak demand through control of excess voltage on the grid on either a dispatchable or continuous basis. Some large industrial customers also have the capacity to respond within a designated notice period and can augment operational flexibility by providing ancillary services. See Demand Management Portfolio below.

Demand Management Portfolio

TVA continues to make investments in its demand management portfolio, consisting of energy efficiency and demand response programs, as part of its commitment to meet the Tennessee Valley’s growing energy needs and to support a decarbonized and more resilient grid. TVA is expanding its portfolio and plans to invest $1.5 billion in its demand management portfolio from 2024 – 2028. Over this five-year period, TVA anticipates approximately 2,200 gigawatt hours of net incremental energy efficiency savings and over 2,200 MW of demand response portfolio capacity in 2028. These amounts are forward-looking and subject to various uncertainties. See Forward-Looking Information and Item 1A, Risk Factors.

Virtual Power Plant. TVA's Virtual Power Plant consists of energy efficiency and demand response programs aimed at balancing system needs by lowering costs, shaping energy usage, increasing capacity, and decarbonizing the grid. These programs support helping end-use consumers save on their bills and reduce some of the need for new generation in the future and are offered to both end-use residential customers and businesses and industries. TVA anticipates additional demand management programs to be developed over the coming years to help support the future direction of the Virtual Power Plant. See Distributed Energy Resources above for further discussion on demand response systems.

Community Energy Efficiency Programs. TVA also has energy programming focused on expanding partnerships, improving program access, and catalyzing investment in communities where all individuals can benefit from TVA's resources. TVA's Community Energy Efficiency Programs include (1) the Home Uplift Program which completes home evaluations and makes high-impact home energy upgrades for qualifying homeowners at no cost to the homeowners, (2) the School Uplift Program which assists schools with adopting strategic energy management practices, and (3) the Small Business Uplift Program which assists small businesses located within underserved communities with energy evaluations and energy improvement investments provided by TVA at no cost to the small business.

Power Purchase and Other Agreements

TVA acquires power from a variety of power producers generally through long-term and short-term PPAs as well as through spot market purchases. During 2023, TVA acquired approximately 92 percent of the power that it purchased through the long-term PPAs described below, including agreements for long-term renewable generation resources, approximately six percent through short-term PPAs, and approximately two percent on the spot market. During 2022, TVA acquired approximately 94 percent of the power that it purchased through long-term PPAs, approximately three percent through short-term PPAs, and

Table of Contents

approximately three percent on the spot market.

TVA's capability provided by PPAs is primarily provided under contracts that expire through 2043 and are described in the table below.


Power Purchase Agreements(1) At September 30, 2023
Type of Facility	Location	Number of Contracts	Contract Capacity (MW)(2)	Contract Termination Date
Renewable PPAs
Operating
Solar	Tennessee	6	413	2032 - 2043
Solar	Alabama	2	302	2037 - 2041
Total Operating Solar		8	715
Wind	Tennessee	1	25	2025
Wind	Iowa	2	299	2030 - 2031
Wind	Kansas	2	366	2032 - 2033
Wind	Illinois	3	550	2032 - 2033
Total Operating Wind		8	1,240
Hydroelectric	Tennessee, Kentucky, and North Carolina	2	779	2025 and upon three years' notice
Landfill Gas	Tennessee	1	5	2031
Subtotal Operating		19	2,739
Contract Renewable Resources(3)			322
Total Renewable Operating PPAs			3,061

Contracted (not yet online)



Solar(4)		16	1,867
Total Renewable Contracted PPAs		16	1,867


Nonrenewable PPAs
Operating
Diesel	Tennessee	4	59	2028 - 2032
Diesel	Alabama	1	10	2035
Diesel	Mississippi	2	46	2028
Total Operating Diesel		7	115
Natural Gas	Alabama	3	2,068	2024 - 2033
Natural Gas(5)	Georgia	3	742	2023 - 2025
Natural Gas	Illinois	1	495	2025
Natural Gas	Pennsylvania	1	500	2024
Total Operating Natural Gas		8	3,805
Delivered Energy(6)	Various	3	1,050	2023
Lignite	Mississippi	1	440	2032
Total Nonrenewable Operating PPAs		19	5,410

Contracted (not yet online)






Battery Storage(4)		3	150
Delivered Energy(4)(6)		1	500
Total Nonrenewable Contracted PPAs		4	650

Notes

(1) TVA sells the RECs resulting from some of its purchased power to certain customers. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Optimum Energy Portfolio — Renewable Power Purchase Agreements.

(2) Represents capability specified in TVA's PPA contracts. The measurement for nonrenewable resources is contracted capacity, adjusted for any contractual summer output constraints. The measurement for renewable resources is contracted capacity of the renewable resources' nameplate capacity. Nameplate

Table of Contents

capacity does not account for real-time operating constraints, such as intermittency of renewable resources associated with weather, delivery mechanisms, or other factors.

(3) Contract Renewable Resources is capability from various historical renewable energy programs that consist of PPAs primarily with individuals and small businesses.

(4) Power delivery is expected to commence between 2024 - 2025. See challenges associated with contracted PPAs not yet online in Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Optimum Energy Portfolio — Renewable Power Purchase Agreements.

(5) Included in the table above is 200 MW of power delivery in Georgia that expired on September 30, 2023.

(6) Delivered energy is sourced from multiple generating assets and originates from various states.

Under federal law, TVA is required to purchase energy from qualifying facilities (cogenerators and small power producers) at TVA's avoided cost of either generating this energy itself or purchasing this energy from another source. TVA fulfills this requirement through the Dispersed Power Production Program. At September 30, 2023, there were 955 generation sources, with a combined qualifying capacity of 285 MW, whose power TVA purchases under this program.

Fuel Supply

General

TVA's consumption of various types of fuel depends largely on the demand for electricity by TVA's customers, the availability of various generating units, and the availability and cost of fuel. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Results of Operations — Financial Results — Operating Expenses.

Nuclear Fuel

Current Fuel Supply. Converting uranium to nuclear fuel generally involves four stages: the mining and milling of uranium ore to produce uranium concentrates; the conversion of uranium concentrates to uranium hexafluoride gas; the enrichment of uranium hexafluoride; and the fabrication of the enriched uranium hexafluoride into fuel assemblies. TVA plans to continue using contracts of various products, lengths, and terms as well as inventory to meet the projected nuclear fuel needs of its nuclear fleet. The net book value of TVA's nuclear fuel was $1.3 billion and $1.5 billion at September 30, 2023 and 2022, respectively. See Note 15 — Risk Management Activities and Derivative Transactions — Counterparty Risk.

TVA, the DOE, and certain nuclear fuel contractors have entered into agreements, referred to as the Down-blend Offering for Tritium ("DBOT"), that provide for the production, processing, and storage of low-enriched uranium that is to be made using surplus DOE highly enriched uranium and other uranium. Low-enriched uranium can be fabricated into fuel for use in a nuclear power plant. Production of the low-enriched uranium began in 2019 and is contracted to continue through September 2025. Contract activity after that date will consist of storage and flag management. Flag management ensures that the uranium is free from foreign obligations, and unencumbered by policy restrictions, so that it can be used in connection with the production of tritium. Under the terms of the interagency agreement between the DOE and TVA, the DOE will reimburse TVA for a portion of the costs of converting the highly enriched uranium to low-enriched uranium. See Note 1 — Summary of Significant Accounting Policies — Down-blend Offering for Tritium for a more detailed discussion of the DBOT project.

Low-Level Radioactive Waste. Certain materials and supplies used in the normal operation of nuclear electrical generating units are potentially exposed to low levels of radiation. TVA sends shipments of low-level radioactive waste to burial facilities in Clive, Utah and Andrews, Texas. TVA is capable of storing some low-level radioactive waste at its own facilities for an extended period of time, if necessary.

Spent Nuclear Fuel. All three nuclear sites have dry cask storage facilities. Sequoyah will need additional capacity by 2029. Watts Bar and Browns Ferry will need additional capacity by 2037. To recover the cost of providing long-term, on-site storage for spent nuclear fuel, TVA filed a breach of contract suit against the U.S. in the U.S. Court of Federal Claims in 2001. As a result of this lawsuit and related agreements, TVA has collected approximately $442 million through 2023.

Tritium-Related Services. TVA and the DOE are engaged in a long-term interagency agreement under which TVA will, at the DOE's request, irradiate tritium-producing burnable absorber rods ("TPBARs") to assist the DOE in producing tritium for the Department of Defense ("DOD"). This agreement, which ends in 2035, requires the DOE to reimburse TVA for the costs that TVA incurs in connection with providing irradiation services and to pay TVA an irradiation services fee at a specified rate per TPBAR over the period when irradiation occurs.

In general, TPBARs are irradiated for one operating cycle, which lasts about 18 months. At the end of the cycle, TVA removes the irradiated rods and loads them into a shipping cask. The DOE then ships them to its tritium-extraction facility. TVA loads a fresh set of TPBARs into the reactor during each refueling outage. Irradiating the TPBARs does not affect TVA's ability to safely operate the reactors to produce electricity.

TVA has provided irradiation services using Watts Bar Unit 1 since 2003 and Watts Bar Unit 2 since 2021. TVA has increased its production to within currently licensed limits for Watts Bar Unit 1 and expects to be at licensed limits for Watts Bar Unit 2 in April 2025. The DOE notified TVA of future increased needs for tritium, and TVA submitted a License Amendment Request in 2023 to fulfill this request. The DOE's decision also allows for irradiation of TPBARs at Sequoyah in the future;

Table of Contents

however, TVA does not have plans to employ Sequoyah units for tritium production in the near term.

Natural Gas and Fuel Oil

During 2023, TVA purchased a significant amount of its natural gas requirements from a variety of suppliers under contracts with terms of up to three years and purchased substantially all of its fuel oil requirements on the spot market. The net book value of TVA's natural gas inventory was $25 million and $54 million at September 30, 2023 and 2022, respectively. The net book value of TVA's fuel oil inventory was $84 million at both September 30, 2023 and 2022. At September 30, 2023, 83 of the combustion turbine assets were dual-fuel capable, and TVA has fuel oil stored on each of these sites as a backup to natural gas.

TVA purchases natural gas from multiple suppliers on a daily, monthly, seasonal, and term basis. During 2023, daily, monthly, seasonal, and term contracts accounted for 20 percent, four percent, 24 percent, and 52 percent of purchases, respectively. TVA plans to continue using contracts of various lengths and terms to meet the projected natural gas needs of its natural gas fleet. During 2023, TVA arranged for the transportation of natural gas on eight separate pipelines, with approximately 69 percent being transported on two pipelines. During 2023, TVA maintained a total of approximately 1,716,000 million British thermal unit(s) ("mmBtu") per day of firm transportation capacity on eight major pipelines, with approximately 60 percent of total firm transportation capacity being maintained on two pipelines.

TVA utilizes natural gas storage services at seven facilities with a total capacity of 7.75 billion per cubic feet ("Bcf") of firm service and 6.275 Bcf of interruptible service to manage the daily balancing requirements of the eight pipelines used by TVA, with approximately 55 percent of the total storage capacity being maintained at two facilities. During 2023, storage levels were generally maintained at between 40 and 80 percent of the maximum contracted capacity at each facility. As TVA's natural gas requirements grow, it is anticipated that additional storage capacity may need to be acquired to meet the needs of the generating assets. In 2024, TVA expects to increase its storage portfolio by approximately seven percent.

Coal

Coal consumption at TVA's coal-fired generating facilities during both 2023 and 2022 was approximately 12 million tons. At September 30, 2023 and 2022, TVA had 21 days and 25 days of system-wide coal supply at full burn rate, respectively, with net book values of $204 million and $165 million, respectively.

TVA utilizes both short-term and long-term coal contracts. During 2023, long-term contracts made up 92 percent of coal purchases, and short-term contracts accounted for the remaining eight percent. TVA plans to continue using contracts of various lengths, terms, and coal quality to meet its expected consumption and inventory requirements. During 2023 and 2022, TVA purchased coal by basin as follows:

Table of Contents

The following charts present the proportion of each delivery method TVA utilizes for its coal supply for the periods indicated:

Coal inventory increased at September 30, 2023 as compared to September 30, 2022. TVA experienced challenges in 2022 related to coal supply as a result of supply limitations and transportation challenges. Coal supply availability and transportation performance improved during the first quarter of 2023. Mild weather prior to late December 2022, which continued in the second through fourth quarters of 2023, required lower than forecasted coal-fired generation, enabling inventory stockpiles to increase, and current market conditions reflect an approximate balance between demand and available supply, due to weaker export markets and lower natural gas prices. TVA also invested in additional multi-year coal supply contracts to help provide stability in coal supply availability. These investments are expected to support fuel resiliency with TVA's overall coal supply.

Transmission

The TVA transmission system is one of the largest high-voltage transmission systems in North America. TVA's transmission system has 69 interconnections with 13 neighboring electric systems and delivered approximately 157 billion kWh of electricity to TVA customers in 2023. In carrying out its responsibility for transmission grid reliability in the TVA service area, the TVA transmission grid has operated with 99.999 percent reliability since 2000. See Item 2, Properties — Transmission Properties.

Pursuant to its Transmission Service Guidelines, TVA offers transmission services to eligible customers to transmit wholesale power in a manner that is comparable to TVA's own use of the transmission system. TVA has also adopted and operates in accordance with its published Transmission Standards of Conduct and separates its transmission function from its power marketing function. As a Balancing Authority, Distribution Provider, Generator Owner, Generator Operator, Planning Coordinator, Reliability Coordinator, Resource Planner, Transmission Owner, Transmission Operator, Transmission Planner, and Transmission Service Provider, as those terms are defined for purposes of NERC regulations, TVA is also subject to federal reliability standards that are set forth by the NERC and approved by FERC. See Regulation.

Additional transmission upgrades may be required to maintain reliability. Upgrades may include enhancements to existing lines and substations or new installations as necessary to provide adequate power transmission capacity, maintain voltage support, and ensure generating plant and transmission system stability. In addition to upgrades to maintain reliability, TVA’s Grid of Tomorrow initiative aims to increase grid flexibility to enable greater use of renewable resources such as solar, wind, and other forms of distributed generation and includes making data and communications upgrades as demonstrated by investments in the new system operations center, energy management system, and fiber optic network. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Optimum Energy Portfolio.

In recognition of the challenges of integrating intermittent and inverter-based resources to the power system, TVA established the Future Grid Performance initiative. The primary goal is to maintain a stable and reliable grid while fostering the evolution of the energy system of the future, one of TVA's strategic elements of Operational Excellence. Secondary goals include improving processes to facilitate an evolving resource mix with new technologies, optimizing approaches and tools to ensure system stability and performance in the future grid, and evaluating and adopting new grid technologies. This initiative seeks to address grid needs to keep the grid reliable and stable as TVA transitions to an energy system that has a greater share of intermittent and inverter-based resources, such as renewables and battery storage, connected to the transmission system.

In addition, TVA is working on various projects with universities, Electric Power Research Institute ("EPRI"), and others to help enable a dynamic and multi-directional grid. TVA is also working in partnership with LPCs to modernize their distribution

Table of Contents

systems by developing a shared vision and roadmap for transforming the Tennessee Valley’s transmission and distribution systems into an integrated regional grid.

These initiatives support TVA’s decarbonization efforts while helping ensure TVA continues to achieve its mission to deliver reliable power at the lowest feasible rate. Investments in a modernized grid will help enable enhanced monitoring and control of TVA’s transmission and generation portfolio.

Weather and Seasonality

Weather affects both the demand for and the market prices of electricity. TVA's power system is generally a dual-peaking system in which the demand for electricity peaks during the summer and winter months to meet cooling and heating needs. TVA uses degree days to measure the impact of weather on its power operations. Degree days measure the extent to which the TVA system 23-station average temperatures vary from 65 degrees Fahrenheit. See Item 1, Business — Flood Control Activities, Item 1, Business — Environmental Matters — Climate Change — Physical Impacts of Climate Change, and

Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Results of Operations — Sales of Electricity.

Competition

TVA provides electricity in a service area that is largely free of competition from other electric power providers. This service area is defined primarily by provisions of law and long-term contracts. The region in which TVA or LPCs that distribute TVA power may provide power is limited and is often referred to as the "fence." Under the FPA, the Anti-Cherrypicking Amendment ("ACPA") limits the ability of others to use the TVA transmission system for the purpose of serving customers within TVA's service area. State service territory laws limit unregulated third parties' ability to sell electricity to consumers. All TVA wholesale power contracts are all requirements contracts; however, Power Supply Flexibility Agreements available to LPCs that have executed long-term Partnership Agreements with TVA allow LPCs to locally generate or purchase up to approximately five percent of their average total hourly energy sales over a certain time period in order to meet their individual customers' needs. Revised flexibility agreements were made available to LPCs in August 2023 which permit projects to be located anywhere in TVA's service area, either connected to the LPC distribution system or TVA's transmission system, and makes it easier for LPCs to partner in projects. In addition, other utilities may use their own transmission lines to serve customers within TVA's service area, and third parties are able to avoid the restrictions on serving end-use customers by selling or leasing generating assets to a customer rather than selling electricity. These threats underscore the need for TVA to design rates and strategically price its products and services to be competitive. There have also been some efforts to erode the ACPA, and the protection of the provision could be limited and perhaps eliminated by federal legislation at some time in the future.

TVA also faces competition in the form of emerging technologies. Improvements in energy efficiency technologies, smart technologies, and energy storage technologies may reduce the demand for centrally provided power. The growing interest by customers in generating their own power through DER has the potential to lead to a reduction in the load served by TVA as well as cause TVA to re-evaluate how it operates the overall grid system to continue to provide highly reliable power at affordable rates. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Optimum Energy Portfolio — Fiber Optic Network.

Finally, TVA and other utility companies are facing an evolving marketplace of increased competition driven by customer choice and behavior. As technology develops, consumers' demands for access to diverse products and services may increase, and customers could choose another utility to meet some or all of their power needs where available, pursue self-generation to meet some or all of their power needs, or move their operations outside of TVA's service territory.

Research and Development

Investments in TVA's research portfolio are supported through partnership and collaboration with LPCs, EPRI, the DOE, federal agencies, peer utilities, universities, and industry vendors and through participation in professional societies and other research consortiums.

Annual investments made in science and technological innovation help meet future business and operational challenges. Each year, TVA's annual research portfolio is updated based on a broad range of operational and industry drivers to assess key technology gaps, performance issues, or other significant issues, addressed through research and development. Core research activities directly support optimization of TVA's generation and transmission assets, air and water quality, energy utilization, and distributed/clean energy integration. TVA also provides research and development services on behalf of LPCs by helping optimize their distribution systems and helping minimize technology gaps in energy utilization and consumer technologies.

Beginning in 2020, TVA placed a high priority on providing innovation and research which aligns to and supports its transformative initiatives: advanced nuclear, decarbonization, energy storage, regional grid transformation, electric vehicles, connected communities, and the newest - future grid performance. TVA has placed an emphasis on research leading to the understanding and application of clean resources to support the reduction of carbon emissions from its power supply. This

Table of Contents

research supports both TVA and national strategic interests to reduce carbon emissions and is designed to both catalyze and support TVA’s decarbonization initiative.

TVA is committed to investing in the future of nuclear and continues to evaluate the licensing and design of emerging nuclear technologies, such as advanced light water SMRs and advanced non-light water reactors, as part of technology innovation efforts aimed at developing the energy system of the future, one of TVA's strategic elements of Operational Excellence. In December 2019, TVA became the first utility in the nation to successfully obtain approval for an early site permit from the NRC to potentially construct and operate SMRs at its Clinch River Site. TVA has entered into memorandums of understanding and agreements that allow for mutual collaboration to explore advanced reactor designs as a next-generation nuclear technology while leveraging the expertise of federally funded research and development centers, utilities, vendors, and academic institutions. These contractual relationships are important steps in the early stages of evaluation as TVA considers the economic feasibility of advanced nuclear reactors. These contractual relationships are also intended to leverage innovations to improve advanced nuclear designs, streamline licensing pathways, find efficiencies in construction methods, and optimize operating expenses. For example, TVA has entered into a multi-party collaborative arrangement to advance the global development of the GE Hitachi Nuclear Energy BWRX-300 SMR. See Note 21 — Collaborative Arrangement for additional information on the multi-party collaboration arrangement. TVA currently believes that this advanced nuclear reactor technology is most readily available for deployment with the fewest risks; as such, TVA is evaluating this technology in greater detail, while still considering other advanced reactor technologies. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Optimum Energy Portfolio — Small Modular Reactors for additional discussion and total costs related to SMR work.

TVA is in the third year of a coalition of utilities and researchers, led by EPRI and the Gas Technology Institute, whose purpose is to engage, inform, and support global low-carbon resources initiatives to develop the pathways for the advancement of carbon reducing technologies for large scale utility deployment. This is a five-year program and includes research to support creating resource options, such as alternative fuels (hydrogen, ammonia, and methanized derivatives), carbon capture, electrification, and utilization of clean DER as part of the overall low-carbon resource mix. TVA has made progress understanding regional geology and carbon capture technologies and is evaluating both with an emphasis on the potential for carbon capture in TVA's future. To support this initiative, in August 2023 TVA entered into an MOU with TC Energy Development Holdings Inc. to study the development, construction, and operation of carbon capture, utilization, transportation, and sequestration infrastructure at or near TVA’s Ackerman and Paradise Combined Cycle Plants. TVA is also exploring the potential for hydrogen to serve as a resource in the decarbonization of the Tennessee Valley, both within the electrical sector and elsewhere. In November 2022, TVA and other major utility companies responded to a funding opportunity from the DOE with the intention of obtaining federal financial support for a Southeast Hydrogen Hub. The Southeast Hydrogen Hub was notified in October 2023 that their application was not among those funded.

At the forefront of the energy storage initiative is deploying grid-scale battery energy storage technology to optimize the existing TVA generation assets and improve the resiliency of the transmission system. In 2020, TVA launched its first TVA-owned, grid scale, lithium-ion demonstration battery project, and in 2023, TVA began construction near Vonore, Tennessee. The system integration lessons learned from this project will guide future application of battery storage as part of the evolving bulk power system in the region. TVA is studying the optimal siting and design for another pumped-storage plant as described in Power Supply and Load Management Resources — Hydroelectric Pumped-Storage. TVA is also evaluating the potential of short duration battery alternatives to lithium-ion and long duration storage alternatives to pumped-storage.

TVA continues to develop potential electrification programs, in addition to the Fast Charge Network, that improve resource use and reduce environmental impacts in the transportation sector. TVA programs are based on previous assessments, which included a multi-stakeholder vision and roadmap effort aimed at identifying the path forward for electric vehicles in Tennessee. The approach provides for broad engagement from industry, government, and utilities that could be applied in other states in the TVA service territory. In addition, TVA is continuing its evaluation of potential electric vehicle adoption strategies through coordination of activities with EPRI and state and industry stakeholders related to operational fleet requirements. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Electric Vehicles.

TVA has established 15 Connected Communities pilot projects with stakeholders and has been engaging in advanced buildings research to support the initiative. Connected Communities projects are aimed at addressing today’s challenges with community-driven information and technology solutions for a modernized energy system. TVA is currently evaluating the next round of pilot projects. TVA has also established six community partnerships to provide consulting services to test a framework for engaging communities to help set goals, scope projects, and apply for funding. Research will continue to identify best practices, better understand challenges in the Tennessee Valley, and scale up learnings from the projects to broader applications throughout the Tennessee Valley.

TVA and LPCs are engaged in several initiatives related to regional grid transformation. Research includes technologies and applications advancement in intelligent distribution systems. Smart meter technology has the potential to shift usage patterns away from peak demand times which could change costs significantly. Additionally, intelligent transmission systems would give TVA the ability to nearly instantaneously diagnose problems, make corrections, and engage transmission and generation resources quickly so that power would keep flowing. This could promote reduced emissions, lower energy costs,

Table of Contents

and add greater flexibility to accommodate the new consumer-generated sources under TVA's renewable energy programs. TVA also worked with LPC partners to execute a survey of LPC technology capabilities and plans, and the results are helping shape a realistic path toward TVA's long-term goals. See Power Supply and Load Management Resources — Distributed Energy Resources and Transmission.

Finally, TVA began a new initiative called Future Grid Performance. This initiative seeks to address grid needs to keep the grid reliable and stable as TVA transitions to an energy system that has a greater share of intermittent and inverter-based resources, such as renewables and battery storage, connected to the transmission system. See Transmission above for more information on this initiative.

Flood Control Activities

The Tennessee River watershed has one of the highest annual rainfall totals of any watershed in the U.S., averaging 51 inches per year. During 2023, approximately 53 inches of rain fell in the Tennessee Valley. TVA manages the Tennessee River system in an integrated manner, which includes managing minimum river flows and minimum depths for navigation, reducing flood damage, generating low-cost hydroelectric power, maintaining flows that support habitat for fish and other aquatic species, maintaining water supply, and providing recreational opportunities for the Tennessee Valley. In addition, having cool water available helps TVA to meet thermal compliance and support normal operation of TVA's nuclear and fossil-fueled plants, while oxygenating water helps fish species remain healthy. TVA spills or releases excess water through its dams in order to reduce flood damage to the Tennessee Valley. TVA typically spills only when all available hydroelectric generating turbines are operating at full capacity and additional water still needs to be moved downstream.

The Tennessee Valley experienced just above normal rainfall at 104 percent of normal and runoff at 89 percent of normal during 2023. Although runoff for 2023 was below normal due to fewer significant rain events, the winter and spring timing of above normal rainfall during the period supported TVA's objective to generate low-cost hydroelectric power while also meeting its river system commitments, including flood mitigation, which is estimated to have prevented damages across the Tennessee Valley of approximately $7 million in 2023 and $9.7 billion over TVA's recorded history.

Environmental Stewardship Activities

TVA's mission includes managing the Tennessee River, its tributaries, and federal lands along the shoreline to provide, among other things, year-round navigation, flood damage reduction, affordable and reliable electricity, recreational opportunities, adequate water supply, improved water quality, and natural resource protection. There are 49 dams that comprise TVA's integrated reservoir system. Each dam may also have ancillary structures used to support or assist the main dam's function. The reservoir system provides approximately 800 miles of commercially navigable waterways and also provides significant flood reduction benefits both within the Tennessee River system and downstream on the lower Ohio and Mississippi Rivers. The reservoir system also provides a water supply for residential and industrial customers, as well as cooling water for TVA's coal-fired plants, combined cycle plants, and nuclear power plants. TVA's Environmental Policy provides objectives for an integrated approach related to providing reliable, affordable, and increasingly clean energy; engaging in proactive stewardship of the Tennessee River system and public lands; and supporting sustainable economic growth. The Environmental Policy also provides additional direction in several environmental stewardship areas related to reducing environmental impacts on the Tennessee Valley's natural resources, including reducing carbon intensity and air emissions; minimizing waste; and protecting water resources and cultural resources. TVA's Biodiversity Policy further builds on the TVA record of environmental stewardship by acknowledging the critical role of natural systems in achieving its mission of improving the quality of life in the region. The policy commits to seeking conservation opportunities within capital projects and improving current operational practices to help minimize impacts, reduce costs, and enhance biodiversity.

TVA serves the people of the TVA region through the integrated management of the Tennessee River system and public lands, which include approximately 11,000 miles of shoreline; 650,000 surface acres of reservoir water; and 293,000 acres of reservoir lands. TVA accomplishes this mission and supports the objectives of the TVA Environmental Policy through implementation of its natural resources stewardship strategy. Within this strategy, TVA confirms a desire to remain agile, balance competing demands, and be a catalyst for collaboration in order to protect and enhance biological, cultural, and water resources as well as create and sustain destinations for recreation and opportunities for learning and research. As part of the strategy, TVA intends to assist water-based community development with the issuance of permits, technical support, and land agreements using planning, clear regulations, meaningful guidelines, and consistent enforcement. Additional guidance for carrying out many of TVA's essential stewardship responsibilities is provided in TVA's Natural Resource Plan. The plan aligns TVA's mission through economic development, energy, and environmental stewardship and guides business planning. It includes ten focus areas, providing a comprehensive view of resource stewardship efforts.

Economic Development Activities

Economic development, along with energy production and environmental stewardship, is one of the primary statutory purposes of TVA. Economic development programs developed by TVA support all communities, including rural and economically distressed communities, across the Tennessee Valley. Through its economic development activities, TVA endeavors to recruit and retain companies in targeted business sectors, foster capital investment and job growth, and assist communities in the

Table of Contents

Tennessee Valley with economic growth opportunities.

TVA seeks to achieve these goals through a combination of initiatives and partnerships with LPCs, regional, state, and local agencies, and communities by providing financial incentives, technical services, industry expertise, and site-selection assistance to new and existing businesses in the Tennessee Valley. TVA's economic development incentive programs offer competitive incentives to new and existing power customers in certain business sectors that make multi-year commitments to invest in the Tennessee Valley. See Note 17 — Revenue — Contract Balances — Economic Development Incentives for total incentives recorded.

In 2023, TVA's economic development efforts, reliability, and competitive rates helped attract or expand 158 companies into the TVA service area. These companies announced the following economic performance measures:


Economic Performance Measure						At September 30, 2023(3)
Projected capital investments						$9.2 billion
Jobs expected to be created (#)(1)						12,276
Jobs expected to be retained (#)(2)						46,135

Notes

(1) "New jobs" in the TVA fiscal year are newly created, paid positions at a facility of a TVA customer. “Positions” are calculated by adding (1) the number of full-time, on-site employees and/or independent contractors at the facility, (2) the total number of full-time work-from-home employees and independent contractors who reside in the TVA service territory and who spend 100% of their work time on facility-related matters, and (3) the total hours worked on facility-related matters by (a) full-time and part-time on-site employees at the facility and (b) full-time and part-time work-from-home employees who reside in the TVA service territory and who spend less than 100% of their work time on facility-related matters, divided by the number of work hours of such employees based on a 40 hour work week. A “TVA customer” means an entity that purchases power from TVA or a distributor of TVA power. New jobs reported by TVA may include positions created during the current TVA fiscal year and certified projections of anticipated positions to be created within a five-year time frame. New job numbers reported by TVA are certified and provided to TVA by TVA customers.

(2) "Retained jobs" are paid positions at a facility of a TVA customer that were created prior to the current TVA fiscal year and that continue to be filled in the current TVA fiscal year. “Positions” are calculated by adding (1) the number of full-time, on-site employees and/or independent contractors at the facility, (2) the total number of full-time work-from-home employees and independent contractors who reside in the TVA service territory and who spend 100% of their work time on facility-related matters, and (3) the total hours worked on facility-related matters by (a) full-time and part-time on-site employees at the facility and (b) full-time and part-time work-from-home employees who reside in the TVA service territory and who spend less than 100% of their work time on facility-related matters, divided by the number of work hours of such employees based on a 40 hour work week. A “TVA customer” means an entity that purchases power from TVA or a distributor of TVA power. Retained job numbers reported by TVA are certified and provided to TVA by TVA customers.

(3) These amounts are forward-looking and are subject to various uncertainties. Amounts may differ materially based upon a number of factors, including, but not limited to, economic downturns or recessions. See Forward-Looking Information and Item 1A, Risk Factors.

Regulation

TVA is required to comply with comprehensive and complex laws, regulations, and orders. The costs of complying with these laws, regulations, and orders are expected to be substantial, and costs could be significantly more than TVA anticipates.

Congress

TVA exists pursuant to the TVA Act as enacted by Congress and carries on its operations in accordance with this legislation. Congress can enact legislation expanding or reducing TVA's activities, change TVA's structure, and even eliminate TVA. Congress can also enact legislation requiring the sale of some or all of the assets TVA operates or reduce the U.S.'s ownership in TVA. To allow TVA to operate more flexibly than a traditional government agency, Congress exempted TVA from all or parts of certain general federal laws that govern other agencies, such as federal labor relations laws and the laws related to the hiring of federal employees, the procurement of supplies and services, and the acquisition of land. Other federal laws enacted since the creation of TVA that are applicable to other agencies have been made applicable to TVA, including those related to paying employees overtime and protecting the environment, cultural resources, and civil rights.

Securities and Exchange Commission

Section 37 of the Securities Exchange Act of 1934 (the "Exchange Act") requires TVA to file with the Securities and Exchange Commission ("SEC") such periodic, current, and supplementary information, documents, and reports as would be required pursuant to Section 13 of the Exchange Act if TVA were an issuer of a security registered pursuant to Section 12 of the Exchange Act. Section 37 of the Exchange Act exempts TVA from complying with Section 10A(m)(3) of the Exchange Act, which requires each member of a listed issuer's audit committee to be an independent member of the board of directors of the issuer. Since TVA is an agency and instrumentality of the U.S., securities issued or guaranteed by TVA are "exempted securities" under the Securities Act of 1933, as amended (the "Securities Act"), and may be offered and sold without registration under the Securities Act. In addition, securities issued or guaranteed by TVA are "exempted securities" and "government securities" under the Exchange Act. TVA is also exempt from Sections 14(a)-(d) and 14(f)-(h) of the Exchange Act (which address proxy solicitations) insofar as those sections relate to securities issued by TVA, and transactions in TVA securities are exempt from rules governing tender offers under Regulation 14E of the Exchange Act. Also, since TVA securities are exempted securities under the Securities Act, TVA is exempt from the Trust Indenture Act of 1939 insofar as it relates to securities issued by TVA, and no independent trustee is required for these securities.

Table of Contents

Federal Energy Regulatory Commission

Under the FPA, TVA is not a "public utility," a term which primarily refers to investor-owned utilities. Therefore, TVA is not subject to the full jurisdiction that FERC exercises over public utilities under the FPA. TVA is, however, an "electric utility" and a "transmitting utility" as defined in the FPA and, thus, is directly subject to certain aspects of FERC's jurisdiction. Under the FPA, for example, TVA (1) must comply with certain standards designed to maintain transmission system reliability; (2) can be ordered to interconnect its transmission facilities with the electrical facilities of independent generators and of other electric utilities that meet certain requirements; (3) can be ordered to transmit wholesale power provided that the order (a) does not impair the reliability of the TVA or surrounding systems, (b) meets the applicable requirements concerning terms, conditions, and rates for service, and (c) does not implicate the ACPA; (4) could be subject to FERC review of the transmission rates and the terms and conditions of service that TVA provides; and (5) is prohibited from (a) reporting false information on the price of electricity sold at wholesale or the availability of transmission capacity to a federal agency with intent to fraudulently affect the data being compiled by the agency and (b) using manipulative or deceptive devices or contrivances in connection with the purchase or sale of power or transmission services subject to FERC's jurisdiction.

In addition, the FPA provides FERC with authority (1) to order refunds of excessive prices on short-term sales (transactions lasting 31 days or less) by all market participants, including TVA, in price gouging situations if such sales are through an independent system operator or regional transmission organization under a FERC-approved tariff; (2) to issue regulations requiring the reporting, on a timely basis, of information about the availability and prices of wholesale power and transmission service by all market participants, including TVA; (3) to investigate electric industry practices, including TVA's operations that are subject to FERC's jurisdiction; and (4) to impose civil penalties of up to $1 million per day for each violation of the provisions of the FPA discussed in the prior paragraph that are applicable to TVA. Criminal penalties may also result from such violations.

Furthermore, while not required to do so, TVA has elected to implement various FERC orders and regulations pertaining to public utilities on a voluntary basis to the extent that they are consistent with TVA's obligations under the TVA Act.

Finally, on July 28, 2023, FERC issued Order 2023. The order updates the procedures for interconnecting generating facilities and is intended to address interconnection queue backlogs, improve certainty in the interconnection process, and prevent undue discrimination for new technologies. TVA is in the process of evaluating the order and its potential impacts on TVA.

NERC Compliance

TVA is subject to federal reliability standards that are set forth by NERC and approved by FERC. These standards are designed to maintain the reliability of the bulk electric system, including TVA's generation and transmission system, and include areas such as maintenance, training, operations, planning, modeling, critical infrastructure, physical and cyber security, vegetation management, and facility ratings. TVA recognizes that reliability standards and expectations continue to become more complex and stringent for transmission systems.

Nuclear Regulatory Commission

TVA operates its nuclear facilities in a highly regulated environment and is subject to the oversight of the NRC, an independent federal agency that sets the rules that users of radioactive materials must follow. The NRC has broad authority to impose requirements relating to the licensing, operation, and decommissioning of nuclear generating facilities. In addition, if TVA fails to comply with requirements promulgated by the NRC, the NRC has the authority to impose fines, shut down units, or modify, suspend, or revoke TVA's operating licenses. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Operational Challenges.

Environmental Protection Agency

TVA is subject to regulation by the Environmental Protection Agency ("EPA") in a variety of areas, including air quality control, water quality control, management and disposal of solid and hazardous wastes, and greenhouse gas ("GHG") reductions to address climate change. See Environmental Matters below and Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges.

States

The Supremacy Clause of the U.S. Constitution prohibits states, without federal legislative consent, from regulating the manner in which the federal government conducts its activities. As a federal agency, TVA is exempt from regulation, control, and taxation by states except in certain areas where Congress has clearly made TVA subject to state regulation. See Environmental Matters below.

Table of Contents

Other Federal Entities

TVA's activities and records are also subject to review to varying degrees by other federal entities, including the Government Accountability Office and the Office of Management and Budget ("OMB"). There is also an Office of the Inspector General which reviews TVA's activities and records.

Taxation and Tax Equivalents

TVA is not subject to federal income taxation. In addition, neither TVA nor its property, franchises, or income is subject to taxation by states or their subdivisions. The TVA Act, however, does require TVA to make tax equivalent payments to states and counties in which TVA conducts power operations or in which TVA has acquired properties previously subject to state and local taxation. The total amount of these payments is five percent of gross revenues from the sale of power during the preceding year excluding sales or deliveries to other federal agencies and off-system sales with other utilities, with a provision for minimum payments under certain circumstances. Except for certain direct payments TVA is required to make to counties, distribution of tax equivalent payments within a state is determined by individual state legislation.

Environmental Matters

TVA's activities, particularly its power generation activities, are subject to comprehensive regulation under environmental laws and regulations relating to air pollution, water pollution, and management and disposal of solid and hazardous wastes, among other matters. The environmental laws and regulations that have the largest impact on TVA's operations and financial condition are discussed below.

Clean Air Act Programs and Regulations

National Ambient Air Quality Standards. The CAA requires the EPA to set National Ambient Air Quality Standards ("NAAQS") for certain air pollutants. The EPA has set NAAQS for ozone, particulate matter, sulfur dioxide ("SO2"), nitrogen oxides ("NOx"), carbon monoxide, and lead. Over the years, the EPA has made the NAAQS more stringent. Each state must develop a plan to be approved by the EPA for achieving and maintaining NAAQS within its borders. These plans impose limits on emissions from pollution sources, which are applicable to certain TVA generating units, including fossil fuel-fired plants. Areas meeting a NAAQS are designated as attainment areas. Areas not meeting a NAAQS are designated as non-attainment areas, and more stringent requirements apply in those areas, including stricter controls on industrial facilities and more complicated and public permitting processes. TVA fossil fuel-fired plants can be impacted by these requirements. Currently, all TVA generating units are located in areas designated as attainment areas. On January 6, 2023, however, the EPA proposed more stringent NAAQS for particulate matter that, if adopted, may increase the likelihood of certain areas in TVA’s service territory being designated as non-attainment areas. TVA could incur significant costs associated with upgrades to facilities if such facilities are in areas that are redesignated as being in non-attainment.

Revised Cross-State Air Pollution Rule. TVA power plants are subject to the EPA's Cross-State Air Pollution Rule ("CSAPR"). CSAPR addresses air pollution from upwind states in the U.S. that affect air quality in downwind states and is focused on NOx and SO2. To comply with CSAPR, TVA power plants must obtain one NOx allowance for every ton of NOx emitted during the ozone season. Under a revised version of CSAPR (the "CSAPR Update Rule"), the Shawnee Fossil Plant ("Shawnee") facility is subject to reduced ozone-season NOx allowances and has been required to use most of its allowance inventory. In 2023, TVA monitored forecasted needs and utilized purchased allowances for the Shawnee facility. A longer-term compliance strategy for the facility is being developed that may include installing NOx control upgrades, incorporating operational changes, and continuing to purchase allowances. When completed, this strategy will help TVA comply with both the CSAPR Update Rule and the Federal Implementation Plan Addressing Regional Ozone Transport for the 2015 Ozone NAAQS. TVA has obtained approval from the State of Kentucky for construction of seven selective catalytic reduction systems ("SCRs") at the Shawnee facility. TVA plans to construct SCRs at four units by the end of 2025 and expects to spend $240 million. TVA is evaluating plans for the remaining three units.

Federal Implementation Plan Addressing Regional Ozone Transport for the 2015 Ozone NAAQS. On March 15, 2023, the EPA issued final regulations known as the "Good Neighbor Plan" to reduce NOx emissions from power plants and certain industrial facilities. With the Good Neighbor Plan, the EPA issued its Federal Implementation Plan ("FIP") that covers 23 states, including Alabama, Kentucky, and Mississippi, to reduce the interstate transport of NOx. Under the rule, beginning with the 2023 ozone season, power plants in 22 states, including Alabama, Kentucky, and Mississippi, are required to participate in a NOx trading program. Over time, the emission budgets will decline based on the level of reductions achievable through phased installation of emissions controls at power plants starting in 2024. The rule also establishes daily emission rates for coal steam electric generating units greater than or equal to 100 MW in the covered states beginning with the 2024 ozone season. To help comply with these regulations, TVA is developing a longer-term compliance strategy for its Shawnee facility that may include installing NOx control upgrades, incorporating operational changes, and continuing to purchase allowances. See Revised Cross-State Air Pollution Rule above. During 2023, the EPA issued interim rules to stay the effectiveness of the 2023 FIP requirements for emission sources in several states, including Kentucky, Mississippi, and Alabama. The Good Neighbor Plan itself has been challenged in the District of Columbia Circuit ("D.C. Circuit"), and applications have been filed with the U.S. Supreme Court to stay the plan while its merits are being litigated.

Table of Contents

Mercury and Air Toxics Standards for Electric Utility Units. In January 2022, the EPA proposed reaffirming that it is appropriate and necessary to regulate hazardous air pollutants ("HAP"), including mercury emitted from steam electric utilities. In addition, in April 2023 the EPA proposed to strengthen and update the Mercury and Air Toxics Standards (“MATS”) for electric utility units to reflect recent developments in control technologies and the performance of these plants. If adopted in its current form, the EPA's proposed MATS could require TVA to install new equipment at some of its coal-fired units, and the cost of such equipment could be substantial.

Environmental Agreements. In 2011, TVA entered into two substantively similar agreements, one with the EPA and the other with Alabama, Kentucky, North Carolina, Tennessee, and three environmental advocacy groups (collectively, the "Environmental Agreements"). To resolve alleged New Source Review claims, TVA committed under the Environmental Agreements to, among other things, take now-completed actions regarding coal units and invest $290 million in certain TVA environmental projects. See Note 22 — Commitments and Contingencies — Legal Proceedings — Environmental Agreements, which discussion is incorporated herein by reference.

Acid Rain Program. The EPA's Acid Rain Program is intended to help reduce emissions of SO2 and NOx, which are the primary pollutants implicated in the formation of acid rain. The program includes a cap-and-trade emission reduction program for SO2 emissions from power plants. TVA continues to reduce SO2 and NOx emissions from its coal-fired plants, and the SO2 allowances allocated to TVA under the Acid Rain Program are sufficient to cover the operation of its coal-fired plants. In the TVA service area, the limitations imposed on SO2 and NOx emissions by the CSAPR program are more stringent than the Acid Rain Program. Therefore, TVA does not anticipate that the Acid Rain Program will impose any additional material requirements on TVA.

Regional Haze Program. The EPA issued the Clean Air Visibility Rule, which required certain older sources to install best available retrofit technology. No additional controls or lower operating limits are required for any TVA units to meet best available retrofit technology requirements. In 2017, the EPA published the final rule that changed some of the requirements for Regional Haze State Implementation Plans ("SIPs"). Specific impacts on TVA cannot be determined until future Regional Haze SIPs are developed for the next decennial review under the visibility haze provisions of the CAA. States were required to submit their Regional Haze SIPs to the EPA by July 31, 2021. In response to requests from state air pollution control agencies in Tennessee and Kentucky, TVA submitted regional haze analyses for its Cumberland and Shawnee facilities, respectively, to those state agencies. The reports evaluate SO2 emission reduction options for these facilities and will be considered by these state agencies in preparing their Regional Haze SIPs. On August 25, 2022, the EPA issued a final action stating that 15 states, including Kentucky, failed to submit a complete SIP, which triggered a two-year deadline for the EPA to promulgate a FIP for the state unless Kentucky submits, and the EPA approves, a SIP satisfying the visibility protection requirements of the CAA. TVA negotiated with Kentucky and agreed to accept a federal limit for SO2 emissions starting January 1, 2028. In August 2023, TVA submitted a Title V permit application to the Kentucky Division of Air Quality that incorporates this limit. TVA anticipates that it could meet this limit by installing control technologies for the seven uncontrolled Shawnee units. See Revised Cross-State Air Pollution Rule above for additional information regarding TVA’s plans to control the Shawnee units.

Start Up, Shutdown, and Malfunctions. Opacity, or visible emissions, measures the denseness or color of power plant plumes and has traditionally been used by states as a means of monitoring good maintenance and operation of particulate control equipment. Under some conditions, retrofitting a unit with additional equipment to better control SO2 and NOx emissions can adversely affect opacity emissions, and TVA and other utilities have addressed this issue. The evaluation of utilities' compliance with opacity requirements is coming under increased scrutiny, especially during periods of startup, shutdown, and malfunction. Historically, SIPs developed under the CAA typically excluded periods of startup, shutdowns, and malfunctions, but in June 2015, the EPA finalized a rule to eliminate such exclusions ("2015 Rule"). Environmental petitioners and several states filed petitions for judicial review of the 2015 Rule before the U.S. Court of Appeals for the D.C. Circuit, and oral arguments were heard on March 25, 2022. Separately, on September 8, 2021, environmental petitioners filed a lawsuit to enforce the SIP calls under the 2015 Rule, and on June 27, 2022, the EPA entered into a consent decree that would require the agency to take final action on SIP revisions submitted in response to the 2015 SIP call by dates ranging from 180 to 480 days from the date of the consent decree. On January 12, 2022, the EPA determined that Alabama and Shelby County (Tennessee) failed to submit a revised SIP as required by the 2015 Rule, and on February 15, 2023, the EPA proposed to issue a new finding of substantial inadequacy and SIP calls to Shelby County, Tennessee. On June 23, 2023, the EPA approved a portion of the SIP revisions submitted by the State of Tennessee. TVA cannot predict the outcome of future SIP evaluations.

New York Petition to Address Impacts from Upwind High Emitting Sources. In 2018, the State of New York filed a petition with the EPA under Section 126(b) of the CAA to address ozone impacts on New York from the NOx emissions from sources emitting at least 400 tons of NOx in CY 2017 from nine states including Kentucky. The New York petition requests that the EPA require daily NOx limits for utility units with selective catalytic reduction systems ("SCRs") such as Shawnee Units 1 and 4 and emission reductions from utility units without SCRs such as Shawnee Units 2, 3, and 5 - 9. Kentucky utility unit NOx emissions are already limited under CSAPR and are declining, and current EPA modeling projects that no additional requirements to reduce Kentucky NOx emissions are necessary. In 2019, the EPA finalized its denial of New York's petition. The State of New York filed a petition in the D.C. Circuit for judicial review of the EPA's denial of the petition, and in July 2020, the D.C. Circuit vacated the EPA's denial of the petition and remanded the petition to the EPA for reconsideration. Specific impacts to TVA cannot be determined until the EPA takes further action on the petition.

Table of Contents

GHG Emissions from Existing Sources. In 2019, the EPA finalized the Affordable Clean Energy ("ACE") rule addressing GHG emissions from existing fossil fuel-fired units. The ACE rule established guidelines, under Section 111(d) of the CAA, for GHG emissions from existing coal-fired units based on efficiency improvements that can be achieved at those units at reasonable cost. On January 19, 2021, the D.C. Circuit vacated and remanded the ACE rule. On October 29, 2021, the U.S. Supreme Court accepted the request filed by a coalition of states and other parties to review the D.C. Circuit's decision to vacate the ACE rule. On June 30, 2022, the U.S. Supreme Court issued its decision in West Virginia v. EPA, in which it restricted the EPA's authority to regulate GHG from existing power plants under Section 111(d). The U.S. Supreme Court concluded that Congress did not grant the EPA authority under the CAA to demand generation-shifting to achieve reduction of GHG emissions, but the court did not hold that the EPA is limited in future rulemakings to just the heat-rate improvements that made up the ACE rule. The judgment of the D.C. Circuit was thus reversed, and the case remanded for further proceedings consistent with the U.S. Supreme Court's opinion. On May 23, 2023, the EPA published in the Federal Register a proposal that would repeal the ACE rule and establish new GHG emission guidelines for both existing fossil fuel-fired steam generating units and existing large, frequently operated stationary combustion turbine units. These proposed GHG emission guidelines, if finalized in their current form, could result in substantial costs to TVA.

GHG Emissions from New Sources. On May 23, 2023, the EPA published in the Federal Register proposed revised new source performance standards ("NSPS") for GHG emissions from new fossil fuel-fired stationary combustion turbine units as well as proposed revised NSPS for GHG emissions from existing fossil fuel-fired steam generating units that undertake large modifications. These proposed NSPS, if finalized in their current form, could result in substantial costs to TVA. In the meantime, the 2015 GHG emission standards for new, modified, and reconstructed electric utility generating units remain in effect.

Climate Change

Emissions. Though many of TVA's facilities continue to emit air pollutants, emissions from all TVA-owned and operated units (including small CTs of less than 25 MW) have been reduced from historic peaks. Emissions of NOx and SO2 began being regulated in 1995 and 1977, respectively. Emissions of NOx and SO2 have been reduced by 97 percent and 99 percent, respectively, since their initial year of regulation.



Emissions and Intensity Rates (1)	CY 2022	CY 2021



Nitrogen Oxide (NOx)(2)
Total NOx Emissions (MT)	15,270	15,210
Total NOx Emissions Intensity (MT/Net MWh)	0.000113	0.000109
Sulfur Dioxide (SO2)(2)
Total SO2 Emissions (MT)	22,331	25,226
Total SO2 Emissions Intensity (MT/Net MWh)	0.000165	0.000181
Mercury (Hg)
Total Hg Emissions (kg)	39.2	22.3
Total Hg Emissions Intensity (kg/Net MWh)	0.0000003	0.0000002

Notes

(1) Intensity rates are calculated based on generation from TVA's most recent fiscal year for years indicated and emissions data from the most recent CYs.

(2) Emissions data is consistent with Edison Electric Institute Environmental, Social, Governance, and Sustainability Report standards, which are based on metric tons ("MTs"), whereas overall CO2 emission rates and baseline reductions from historical levels are based on short tons.

For CY 2022, TVA's emissions of carbon dioxide ("CO2") from its owned and operated units, including purchased power and REC retirement adjustments which reduce the reportable CO2 emissions, were 54 million tons, resulting in a TVA system average, as delivered, CO2 emission rate of 658 lbs/MWh. This represents a 54 percent and 50 percent reduction in mass carbon emissions and TVA's carbon emission rate, respectively, from 2005 levels.

While TVA continues down the path of lowering emissions, including GHG emissions, there will be fluctuations in TVA's emission numbers. Between CY 2021 and CY 2022, TVA's GHG emissions reflect higher electricity usage in the Tennessee Valley as the region experienced economic growth. Changes in the power supply mix between CY 2021 and CY 2022 also impacted the emissions fluctuation, as TVA continues to make operational decisions to keep the system reliable and deliver low-cost energy.

Report on Climate-Related Risks. On January 30, 2023, the Government Accountability Office ("GAO") publicly released a report entitled Tennessee Valley Authority: Additional Steps Are Needed to Better Manage Climate-Related Risks. This report examines climate-related risks to TVA's operations and steps TVA has taken to manage climate-related risks as well as additional steps needed. In the report, the GAO made three recommendations:

• TVA's CEO should direct TVA staff to conduct an inventory of assets and operations vulnerable to climate change that includes analyzing the likelihood and degree of damage or disruption from climate change and the likely consequences if specific climate effects were to occur.

Table of Contents

• Once TVA staff identifies vulnerable assets and operations, TVA's CEO should direct TVA staff to develop a resilience plan that identifies and prioritizes measures to address climate change vulnerabilities and that includes a portfolio of resilience measures and an action plan that specifies which risks to address and how and when to do so.

• TVA's CEO should direct TVA staff to establish a plan to routinely reassess the TVA resilience plan and incorporate updated information about implemented resilience actions, as well as updated information about climate change, resilience technologies and planning tools, and connected infrastructure vulnerabilities.

TVA provided a response to the GAO in June 2023 outlining completed and planned TVA actions to address the recommendations. To strengthen TVA’s climate resiliency, TVA has established new priority actions in TVA’s Climate Action Adaptation and Resiliency Plan. These actions include continuing to implement and maintain seasonal readiness programs that incorporate climate threats, continuing to evaluate climate threats in enterprise risk management, researching methods for improving climate resilience and adaptation planning, incorporating relevant climate change information in each IRP, evaluating systems and components for potential resiliency hardening, integrating climate resiliency in the transmission grid resiliency program, and completing asset analysis and incorporating climate resiliency into business processes.

Executive Actions. President Biden has taken several executive actions relating to climate change.

•On January 20, 2021, President Biden issued EO 13990, "Protecting Public Health and the Environment and Restoring Science To Tackle the Climate Crisis." EO 13990 directs federal agencies to review and revise regulations consistent with broad policy goals to improve public health and the environment, reduce GHG emissions, and prioritize environmental justice.

•On January 27, 2021, President Biden issued EO 14008, "Executive Order on Tackling the Climate Crisis at Home and Abroad." EO 14008 seeks to promote safe global temperatures, increase climate resilience, and support low greenhouse gas emissions and climate-resilient development by, among other things, (1) using federal procurement authorities to achieve or facilitate (a) a carbon pollution-free electricity sector no later than 2035 and (b) clean and zero-emission vehicles for federal, state, local, and tribal government fleets, (2) putting the U.S. on a path to achieve net-zero emissions, economy-wide, by no later than 2050, and (3) establishing the Justice40 Initiative, instructing federal agencies to direct 40 percent of the benefit from eligible projects toward disadvantaged communities.

•On May 20, 2021, President Biden issued EO 14030, “Climate-Related Financial Risk,” which calls for a governmental-wide strategy on the disclosure of climate-related financial risk that includes, among other things, the measurement, assessment, mitigation, and disclosure of climate-related financial risk to federal government programs, assets, and liabilities in order to increase the long-term stability of federal operations.

•On December 8, 2021, President Biden issued EO 14057, "Executive Order on Catalyzing Clean Energy Industries and Jobs Through Federal Sustainability," which details the administration’s policy to take a whole-of-government approach to lead by example to achieve a carbon pollution-free electricity sector by 2035 and net-zero emissions economy-wide by no later than 2050. Implementing Instructions for EO 14057 issued in August 2022 provided instructions to federal agencies regarding agency planning, reporting requirements, and accountability. Agencies must issue or revise existing agency policies, directives, and guidance, as appropriate, including employee training, to ensure alignment with the goals and requirements of EO 14057.

•On September 12, 2022, President Biden issued EO 14082, “Implementation of the Energy and Infrastructure Provisions of the Inflation Reduction Act of 2022.” EO 14082 provides that in implementing the Inflation Reduction Act, federal agencies shall, as appropriate and to the extent consistent with law, prioritize, among other things, (1) driving progress to achieve the climate goals of the U.S. to reduce greenhouse gas emissions 50 to 52 percent below 2005 levels in 2030, achieve a carbon pollution-free electricity sector by 2035, and achieve net-zero emissions by no later than 2050, (2) advancing environmental and climate justice through an all-of-government approach, including through the Justice40 Initiative set forth in EO 14008, and (3) promoting construction of clean energy generation, storage, transmission, and enabling technologies through efficient, effective mechanisms that incorporate community engagement.

•On April 21, 2023, President Biden issued EO 14096, “Revitalizing Our Nation's Commitment to Environmental Justice for All.” EO 14096, among other things, details the administration’s policy to take a whole-of-government approach to environmental justice and to advance environmental justice by implementing and enforcing the nation’s environmental and civil rights laws, preventing pollution, addressing climate change and its effects, and working to clean up legacy pollution that is harming human health and the environment. In addition, EO 14096 directs each federal agency to make achieving environmental justice part of its mission and to submit an environmental justice strategic plan to the Chair of the Council on Environmental Quality within 18 months of the date of the order and every four years thereafter.

•On September 21, 2023, President Biden announced that he approved recommendations from the Interagency Working Group on the expanded use of the social costs of GHG for budgeting, procurement, and other agency decisions, including reaffirming its use for environmental reviews where appropriate.

Table of Contents

TVA is voluntarily pursuing multiple policies and programs in the Tennessee Valley that support the goals and policies of these executive actions. See Actions Taken by TVA to Reduce GHG Emissions below. TVA must consider executive actions within the context of statutory requirements imposed by Congress when carrying out its mission such as the TVA Act and the Energy Policy Act of 1992 that require power be sold at rates as low as feasible and the use of least-cost resource planning, respectively. TVA performs long-term least-cost resource planning through its Integrated Resource Plan process.

Paris Agreement. The U.S. is currently part of the Paris Agreement. The Paris Agreement tracks emissions targets through nationally determined contributions ("NDCs"). Each nation that is a party to the Paris Agreement is asked to prepare five-year, successive NDCs that it plans to achieve. On April 22, 2021, the Biden Administration announced its GHG NDCs for 2030 under the Paris Agreement, and these NDCs establish a new target for the U.S. to achieve a 50 to 52 percent reduction from 2005 levels in economy-wide net GHG pollution in 2030. TVA's own operations have achieved GHG reductions from 2005 levels that are in excess of 50 to 52 percent.

Litigation. Climate change issues have been the subject of a number of lawsuits, including lawsuits against TVA, and TVA may be subject to additional lawsuits in the future. See Note 22 — Commitments and Contingencies — Legal Proceedings for additional information.

Indirect Consequences of Regulation or Business Trends. Legal, technological, political, and scientific developments regarding climate change may create new opportunities and risks. The potential indirect consequences could include an increase or decrease in electricity demand, increased demand for clean generation from alternative energy sources, and subsequent impacts to business reputation and public opinion. See Power Supply and Load Management Resources.

Physical Impacts of Climate Change. Physical impacts of climate change may include, but not be limited to, changing weather patterns, extreme weather conditions, and other events such as flooding, droughts, wildfires, heat waves, and snow or ice storms, and these events can impact TVA's system in terms of system operability, customer demand, and the health of regional economies. TVA has a 2021 Climate Change Action Plan which it updated in 2022. The goal of the action planning process is to ensure TVA continues to achieve its mission and program goals and to operate in a secure, effective, and efficient manner in a changing climate by integrating climate change adaptation efforts in coordination with state and local partners, tribal governments, and private stakeholders. TVA manages the risks proposed by climate change on its mission, programs, and operations within its environmental management processes, though such risks cannot be completely eliminated.

Actions Taken by TVA to Reduce GHG Emissions. TVA has reduced GHG emissions from both its generation facilities and its other operations. TVA Board actions have focused on further reducing GHG emissions from its generation fleet by evaluating the potential retirement of its coal-fired fleet, increasing its nuclear capacity, modernizing its hydroelectric generation system, increasing natural gas-fired generation to enable greater integration of renewables on the grid, increasing its purchases of renewable energy, building solar facilities, and investing in energy efficiency initiatives to reduce energy use in the Tennessee Valley. Additionally, TVA continues to invest in energy efficiency in its operations and offers renewable energy programs. See Power Supply and Load Management Resources — Renewable Energy Resources. These changes support the broad electrification and carbon emission reduction efforts in other sectors of the economy. There are inherent challenges each year in both operations and asset changes. TVA will not sacrifice reliability at any time, which means that TVA must make certain operational decisions at times to keep the system reliable, possibly impacting annual performance on carbon emissions. Therefore, while TVA continues to strive to lower GHG emissions, there will be fluctuations in TVA’s emission numbers resulting from changes in the power supply mix, weather impacts, economic conditions, and generating unit performance. As TVA evolves its generation portfolio, and after appropriate environmental review under NEPA, the TVA Board could make decisions about the timing, retirement, and replacement of aging fossil units or other expiring capacity, which may further TVA’s CO2 and other emissions reductions. The Environmental Policy also provides additional direction in several environmental stewardship areas related to reducing environmental impacts on the Tennessee Valley's natural resources, including reducing carbon intensity and air emissions. In addition, TVA's decarbonization initiative is aimed at understanding and applying clean resources to support the reduction of carbon emissions from its power supply, and TVA is exploring several technologies as part of these efforts. See Research and Development above.

Renewable/Clean Energy Standards

Thirty-six states and the District of Columbia have established enforceable or mandatory requirements for electric

utilities to generate a certain amount of electricity from renewable sources or have established a renewable goal. In 12 of those

states and the District of Columbia, the requirement is for a 100% clean electricity standard or goal by 2050 or earlier. One state within the TVA service area, North Carolina, has a mandatory renewable and clean energy goal that, while not applying directly to TVA, does apply to TVA's LPCs serving retail customers in that state. TVA's policy is to provide compliance assistance to any distributor of TVA power, and TVA is providing assistance to the covered LPCs that sell TVA power in North Carolina. In 2020, Virginia signed into law the Clean Economy Act. This act establishes a mandatory requirement for utilities to generate a certain amount of electricity from renewable sources. At this time, TVA is not impacted by the legislation due to the relatively small amount of electricity that TVA provides in Virginia compared to other utilities. Likewise, the Mississippi Public Service Commission adopted an energy efficiency rule applying to electric and natural gas providers in the state, and TVA is supplying information on participation in TVA's energy efficiency programs to support the covered Mississippi LPCs.

Table of Contents

Water Quality Control Developments

Waters of the United States. On May 25, 2023, the Supreme Court in Sackett v. EPA narrowed the interpretation of the scope of “waters of the United States” under the Clean Water Act (“CWA”). Specifically, the Court ruled that CWA jurisdiction extends only to wetlands that have continuous surface connection with relatively permanent bodies of water connected to traditional interstate navigable waters. In reaching its decision, the Court rejected the “significant nexus” standard for determining the jurisdiction of the CWA that was articulated by Justice Kennedy in the Court’s Rapanos decision. The result of this decision is that fewer waters will be subject to CWA permitting or other restrictions. In response to the Sackett v. EPA decision, the EPA and the Army Corps of Engineers (“ACE”) published a final rule in the Federal Register on September 8, 2023, that reestablishes, for the third time, the definition of Waters of the United States. The new definition encompasses fewer water bodies than the previous definition. As such, ACE permits will no longer be required for some streams and wetlands that would have been included based on the previous “significant nexus” standard.

Cooling Water Intake Structures. In 2014, the EPA released a final rule under Section 316(b) of the CWA relating to cooling water intake structures ("CWIS") for existing power generating facilities. The rule requires changes in CWIS used to cool the vast majority of coal, gas, and nuclear steam-electric generating plants and a wide range of manufacturing and industrial facilities in the U.S. The final rule requires CWIS to reflect the best technology available ("BTA") for minimizing adverse environmental impacts, primarily by reducing the amount of fish and shellfish that are impinged or entrained at a CWIS. These new requirements will potentially affect a number of TVA's fossil- and nuclear-fueled facilities and will likely require capital upgrades to ensure compliance. Most TVA facilities are projected to require retrofit of CWIS with "fish-friendly" screens and fish return systems to achieve compliance with the new rule. The rule is being implemented through permits issued under the National Pollutant Discharge Elimination System ("NPDES") in Section 402 of the CWA. State agencies administer the NPDES permit program in most states including those in which TVA's facilities are located. In addition, the responsible state agencies must provide all permit applications to the U.S. Fish and Wildlife Service for a 60-day review prior to public notice and an opportunity to comment during the public notice. As a result, the permit may include requirements for additional studies of threatened and endangered species arising from U.S. Fish and Wildlife Service comments and may require additional measures be taken to protect threatened and endangered species and critical habitats directly or indirectly related to the plant cooling water intake. TVA's review of the final rule indicates that the rule offers adequate flexibility for cost-effective compliance. The required compliance timeframe is linked to plant-specific NPDES permit renewal cycles (i.e., technology retrofits), and compliance activities have begun and are expected to continue through the 2028 - 2030 timeframe.

The EPA has never previously applied the requirements under Section 316(b) to hydroelectric facilities. However, on September 30, 2021, EPA Region 10, which covers an area outside TVA’s service area, issued NPDES permits to four hydroelectric plants that include Section 316(b) requirements. In determining the BTA to minimize adverse impacts on the environment using best professional judgment, Region 10 analyzed the existing controls that the hydroelectric facilities were already implementing and concluded that those controls constitute BTA. It is not clear whether this approach will be adopted nationwide or how the BTA standard would be applied to TVA's hydroelectric facilities; accordingly, the specific impacts to TVA from the Region 10 permits cannot be determined at this time.

Hydrothermal Discharges. The EPA and many states continue to focus regulatory attention on potential effects of hydrothermal discharges. Many TVA plants have variances from thermal standards under Section 316(a) of the CWA that are subject to review as NPDES permits are renewed. Specific data requirements in the future will be determined based on negotiations between TVA and state regulators. If plant thermal limits are made more stringent, TVA may have to install cooling towers at some of its plants and operate installed cooling towers more often. This could result in a substantial cost to TVA.

Steam-Electric Effluent Guidelines. In 2015, the EPA revised existing steam-electric effluent limitation guidelines ("ELGs"), which regulate water discharge pollutants and require the application of certain pollutant control technologies. The 2015 ELGs established more stringent performance standards for existing and new sources and required major upgrades to wastewater treatment options at all coal-fired plants. Compliance with new requirements was originally required in the CYs 2018 - 2023 timeframe, but the EPA delayed the compliance dates for flue gas desulfurization ("FGD") wastewater and bottom ash transport water until CYs 2020 - 2023 to allow the EPA time to review and potentially revise the ELGs with regard to these waste streams.

In October 2020, the EPA issued final revised ELGs for bottom ash transport water and FGD wastewater. The primary impact for TVA is on the operation of existing coal-fired generation facilities. The revised ELGs could impact long-term investment decisions being made relative to the long-term compliance and operability of these plants. The revisions may require TVA to install additional wastewater treatment systems for FGD wastewater and bottom ash transport water, and TVA could incur substantial costs to comply with the new rule. In addition, the revised ELGs could cause TVA to further reduce utilization of its coal-fired generation facilities or even to decommission such facilities. The revision also includes a subcategory for which Cumberland would qualify that provides TVA greater flexibility in meeting the ELGs. The revision includes two additional subcategories for low utilization units and units that cease coal combustion by the end of CY 2028. TVA is evaluating the applicability of those subcategories to its plants as appropriate. In October 2021, TVA filed Notices of Planned Participation preserving the option for TVA's Bull Run, Cumberland, and Kingston plants to participate in the subcategory for units that cease coal combustion by the end of CY 2028.

Table of Contents

Petitions for judicial review of the October 2020 ELG rule were filed in the D.C. Circuit and the U.S. Court of Appeals for the Fourth Circuit (the "Fourth Circuit") and have been consolidated in the Fourth Circuit in the case Appalachian Voices, et al. v. EPA. On August 3, 2021, the EPA announced a supplemental rulemaking to revise the Steam Electric Power Generating Effluent Limitations Guidelines and Standards. As part of the rulemaking process, the EPA will determine whether more stringent limitations and standards are appropriate and consistent with the technology-forcing statutory scheme and the goals of the CWA. Because this rulemaking could result in more stringent ELGs, the EPA has requested that the Appalachian Voices, et al. v. EPA litigation in the Fourth Circuit be stayed pending the outcome of the supplemental rulemaking process.

Consistent with the 2020 rule, on January 8, 2021, TVA submitted requests to state regulatory authorities to modify NPDES permits for Kingston, Cumberland, Bull Run, Shawnee, and Gallatin Fossil Plant ("Gallatin") to incorporate into the permits limitations in the 2020 rule. The Kentucky Department for Environmental Protection issued a final revised permit for Shawnee in the fourth quarter of 2021 and an additional revision in the second quarter of 2022. The Tennessee Department of Environment and Conservation ("TDEC") issued a final revised permit for Kingston in the first quarter of 2022 and for Gallatin in May 2022. TDEC issued a draft permit for Bull Run in August 2022 and a draft permit for Cumberland in October 2023.

On March 7, 2023, the EPA proposed new ELGs for steam electric power generators. The proposed rule would impose more stringent effluent limits on discharges of flue gas desulfurization wastewater, bottom ash transport water, and combustion residual leachate from coal-fired power plants as well as establish new definitions for various legacy wastewaters, which affects when more stringent requirements will apply to such wastewaters. The EPA's proposed rule also includes flexible paths for certain types of power plants to come into compliance with the proposed ELGs. Since this is a proposed rule, it is premature to evaluate the potential impacts of this rule on TVA operations; however, the EPA's adoption of such a rule could result in material compliance costs to TVA.

Other Clean Water Act Requirements. As is the case in other industrial sectors, TVA and other utilities are also facing more stringent requirements related to the protection of wetlands, reductions in storm water impacts from construction activities, new water quality criteria for nutrients and other pollutants, new wastewater analytical methods, and changes in regulation of pesticide application.

Cleanup of Solid and Hazardous Wastes

TVA Sites. TVA historical operations at certain facilities have resulted in releases of contaminants that TVA is addressing, including at TVA's Environmental Research Center at Muscle Shoals, Alabama. TVA has completed several removal, remedial, and characterization actions at the site, as required by a RCRA permit issued by the Alabama Department of Environmental Management ("ADEM"). At September 30, 2023, TVA's estimated liability for required cleanup and similar environmental work for those sites for which sufficient information was available to develop a cost estimate was approximately $16 million and was included in Accounts payable and accrued liabilities and Other long-term liabilities on the Consolidated Balance Sheets. ADEM issued a renewed permit to TVA on July 7, 2023, with a 10-year term. The new permit will not have any adverse impacts on TVA. In addition, the Environmental Research Center has an active groundwater monitoring program as part of a permitted corrective action plan.

Non-TVA Sites. TVA is aware of alleged hazardous-substance releases at certain non-TVA areas for which it may have some liability. See Note 22 — Commitments and Contingencies — Contingencies — Environmental Matters.

Coal Combustion Residuals. The EPA published its final rule governing CCR in 2015. The rule regulates CCR as nonhazardous waste under Subtitle D of RCRA and establishes standards for landfill and surface impoundment placement, design, operation, and closure; groundwater monitoring; corrective action; and post-closure care. While states may adopt the rule's requirements into their regulatory programs, the rule does not require states to adopt the requirements. The initial version of the rule provided for self-implementation by utilities and allowed enforcement through citizen suits in federal court. The Water Infrastructure Improvements for the Nation Act subsequently allowed state or federal-based permitting to implement the EPA's CCR rule ("CCR Rule") instead of self-implementation and citizen suits. In 2020, the EPA issued the final Part A revision to its CCR Rule. Among other things, the final Part A rule requires unlined CCR surface impoundments to stop receiving CCR and non-CCR wastestreams and to initiate closure or retrofit by no later than April 11, 2021. TVA ceased sending CCR and non-CCR wastestreams to, and initiated closure of, unlined CCR surface impoundments by the specified deadline. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Coal Combustion Residuals — Coal Combustion Residuals Facilities for a discussion of the impact on TVA's operations, including the cost and timing estimates of related projects.

On May 18, 2023, the EPA issued a proposed rule expanding the federal CCR Rule to include legacy CCR units. The proposed rule would establish two new classes of units not currently regulated under the federal CCR Rule: (1) legacy CCR surface impoundments, which are surface impoundments that (a) contained both CCR and liquids on or after October 19, 2015, and (b) are located at a power plant that ceased generating power prior to October 19, 2015, and (2) CCR management units, which are any area of land (a) on which any non-containerized accumulations of CCR are received, placed, or otherwise managed, and (b) which is not a CCR unit. The EPA proposes to subject both classes of legacy units to the requirements applicable to currently regulated units with a few exceptions and also proposes to mandate the requirement to initiate closure within 12 months of the effective date of the rule. If finalized in its current form, this proposed rule may significantly increase the

Table of Contents

number of federally regulated units in TVA’s fleet that will be subject to substantial costs for closure, post-closure, and potential remediation, and could have a material adverse effect on TVA's results of operations and financial condition. In addition, the EPA has recently interpreted its CCR Rule in a way that could create significant additional costs with implementing closure.

In addition to the requirements of the EPA's CCR Rule, CCR landfills and surface impoundments will continue to be regulated by the states. In August 2015, TDEC issued an order that (1) established a process for TDEC to oversee TVA's implementation of the EPA's CCR Rule to ensure coordination and compliance with Tennessee laws and regulations that govern the management and disposal of CCR and (2) required TVA to investigate and assess CCR contamination risks at seven of TVA's eight coal-fired plants in Tennessee and to remediate any unacceptable risks. The TDEC order does not allege that TVA is violating any CCR regulatory requirements nor does it assess TVA penalties. The TDEC order sets out an iterative process through which TVA and TDEC will identify and evaluate any CCR contamination risks and, if necessary, respond to such risks. TVA has submitted to TDEC environmental assessment reports (“EARs”) for Allen, Cumberland, John Sevier, Bull Run, Kingston, Watts Bar Fossil, and Johnsonville. At TDEC's request, to address a potential data gap, TVA is conducting additional investigation work at Allen around the West Ash Disposal Area and will submit a revised EAR upon completion of that work. Upon TVA's submittal of each EAR, TDEC will review the document and provide comments, and TVA will make revisions until TDEC approves a final EAR for each site. After the EARs are approved, TVA will submit Corrective Action/Risk Assessment ("CARA") Plans that will identify the unacceptable risks and TVA's proposed remediation. TDEC approved the EARs for John Sevier and Cumberland in the first quarter of 2024, and the CARA Plans for those sites will be submitted to TDEC as required by the order. It is too early to accurately predict the scope of any remedial activities that may arise under the order, and as such cost estimates for any required remedies are not possible to predict at this time. See also Part II, Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations – Key Initiatives and Challenges – Coal Combustion Residuals – Coal Combustion Residual Facilities for a discussion of an EAR for Gallatin that was recently approved by TDEC pursuant to a consent order and agreement.

In October 2019, TDEC released amendments to its regulations which govern solid waste disposal facilities, including TVA's active CCR facilities covered by a solid waste disposal permit and those which closed pursuant to a TDEC-approved closure plan. Such facilities are generally subject to a 30-year post-closure care period during which the owner or operator must undertake certain activities, including monitoring and maintaining the facility. The amendments, among other things, add an additional 50-year period after the end of the post-closure care period, require TVA to submit recommendations as to what activities must be performed during this 50-year period to protect human health and the environment, and require TVA to submit revised closure plans every 10 years.

Groundwater Contamination. The EPA, environmental groups, and state regulatory agencies are increasing their attention on alleged groundwater contamination associated with CCR management activities. As a result, TVA may have to change how it manages CCR at some of its plants, potentially resulting in higher costs. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Coal Combustion Residuals — Coal Combustion Residuals Facilities and — Allen Groundwater Investigation and Note 13 — Asset Retirement Obligations.

Environmental Investments

From 1970 to 2023, TVA spent approximately $6.8 billion on controls to reduce emissions from its coal-fired power plants. In addition, TVA has reduced emissions by idling or retiring coal-fired units and relying more on cleaner energy resources including natural gas and nuclear generation and renewable sources.

TVA currently anticipates spending significant amounts on environmental projects in the future, including investments in new clean energy generation including renewables to reduce TVA's overall environmental footprint. TVA environmental project expenditures could also result from coal-fired plant decommissioning and from effective ash management modernization. Based on TVA's decisions regarding certain coal-fired units, the amount and timing of expenditures could change. See Power Supply and Load Management Resources — Coal-Fired above and Estimated Required Environmental Expenditures below.

SO2 Emissions and NOx Emissions. To reduce SO2 emissions, TVA operates scrubbers on 17 of its coal-fired units and switched to lower-sulfur coal at certain coal-fired units. To reduce NOx emissions, TVA operates SCRs on 17 coal-fired units, operates low-NOx burners or low-NOx combustion systems on 20 units, optimized combustion on all 24 units, and operates NOx control equipment year round when units are operating (except during start-up, shutdown, and maintenance periods). TVA has also retired 35 of 59 coal-fired units. Except for seven units at Shawnee, the remaining coal-fired units in the TVA fleet have scrubbers and SCRs. TVA plans to construct SCRs at four of the Shawnee units by the end of 2025 and is evaluating plans for the remaining three units. See Power Supply and Load Management Resources — Coal-Fired above.

Particulate Emissions. To reduce particulate emissions of air pollutants, TVA has equipped all of its coal-fired units with scrubbers, mechanical collectors, electrostatic precipitators, and/or bag houses.

Greenhouse Gas Emissions. Various federal agencies, including the EPA and the Department of Commerce, may issue regulations establishing more stringent air and waste requirements, as well as GHG accounting requirements, and these requirements could result in significant changes in the structure of the U.S. power industry, especially in the eastern half of the country. There could be additional material costs if further reductions of GHGs, including CO2, are mandated by legislative,

Table of Contents

executive, regulatory, or judicial actions and if more stringent emission reduction requirements for conventional pollutants are established. These costs cannot reasonably be predicted at this time because of the uncertainty of these actions.

Estimated Required Environmental Expenditures

The following table contains information about TVA's current estimates on projects related to environmental laws and regulations.


Estimated Potential Environmental Expenditures(1)(2) As of September 30, 2023 (in millions)
	2024		2025		2026 - 2028(3)(4)		Total
Coal Combustion Residual Program(5)	$	323	$	349	$	936	$	1,608
Clean Air Act control projects(6)	109		85		58		252
Clean Water Act requirements(7)	52		59		79		190

Notes

(1) These estimates are subject to change as additional information becomes available and as regulations change.

(2) These estimates include $200 million, $171 million, and $122 million for 2024, 2025, and 2026 - 2028, respectively, in capital environmental expenditures. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Liquidity and Capital Resources — Cash Requirements.

(3) See Note 22 — Commitments and Contingencies.

(4) These estimates do not include expenditures expected to be incurred after 2028.

(5) Includes costs associated with the closure of facilities and landfill activities. TVA is continuing to evaluate the rules and their impact on its operations, including the cost and timing estimates of related projects. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Coal Combustion Residuals — Coal Combustion Residuals Facilities and Note 13 — Asset Retirement Obligations.

(6) Includes air quality projects that TVA is currently performing to comply with existing air quality regulations, but does not include any projects that may be required to comply with potential GHG regulations or transmission upgrades.

(7) Includes projects that TVA is currently planning to comply with revised rules under the Clean Water Act regarding CWIS and ELGs for steam electric power plants.

Human Capital Management

People Strategy and TVA's Values

As the TVA region continued to grow throughout 2023, increasing not only its demand for electricity but also its demand for talent across the Tennessee Valley, the employees of TVA continue to advance the unique TVA mission and create a culture that lives up to its values - Safety, Integrity, Inclusion, and Service. TVA employees collectively align to address business needs together and enable strong performance while serving approximately 10 million people of the Tennessee Valley.

As part of its People Advantage strategic priority, TVA strives to create a work environment that supports and responds to the changing needs of the workforce. People Advantage is one of TVA's five strategic priorities and a multi-year commitment to evolve TVA's culture. TVA continues to strive to effectively demonstrate the value of its human capital and putting its people first by sustaining and evolving these programs.

The focus on People Advantage, along with the other four strategic priorities of Operational Excellence, Financial Strength, Powerful Partnerships, and Igniting Innovation, allows TVA to fulfill its daily mission of service to the people of the Tennessee Valley.

TVA's People Advantage priority is anchored on three specific pillars: (1) Inclusion with Diversity ("IwD"), (2) Talent, and (3) Engagement. To help shape an inclusive work environment that values all voices, TVA has intensified its efforts over the past few years to integrate IwD into its culture and make its efforts and progress sustainable and a part of TVA's daily operations. Similarly, TVA has promoted a people-focused organization that amplifies and harnesses the energy, power, and creativity of an experienced and talented workforce - one that continues to bring about the best from its people - manifesting itself as a "destination for difference makers" for highly-skilled candidates. TVA is working to cultivate a positive employee experience to heighten workforce engagement. This work is focused on equipping leaders to champion engagement across the enterprise through the understanding and leveraging of employee surveys, workplace flexibility opportunities, and health, safety, and well-being programs.

Management illustrates its commitment to human capital by including a safety metric in its incentive compensation metrics that tracks the serious injury incident rate and applies to all eligible participants in TVA’s annual program. Compensation derived from this program is based on TVA performance and individual achievements. As a result, success in measures like safety and similar principles grounded in human capital matters helps TVA maintain top quartile ranking in workforce engagement.

Ethics

Ethics and integrity are highly valued at TVA. Since its establishment in 1933, a commitment to ethics has been a part of TVA's DNA. TVA's Ethics & Compliance ("E&C") office aims to help employees make the right decisions when the right

Table of Contents

decisions may not be clear. The office is focused on educating and creating awareness while also assisting employees with ethical decision-making inside and outside of the TVA workplace. Further, TVA requires all employees and certain contractors to take its annual ethics training and attest to its Code of Conduct, which sets forth standards for adhering to TVA's core values and conducting its affairs with openness, honesty, and integrity every day.

TVA contracted with Ethisphere® to take a deep dive review of TVA's corporate ethics and compliance program. After this review, TVA became the first federal agency to receive the Compliance Leader VerificationTM certification, applicable for 2022-2023.

TVA Board Governance and Oversight

The TVA Board’s People and Governance Committee ("Committee") assists the TVA Board in fulfilling its responsibilities under the TVA Act by overseeing policies and strategies that affect a wide array of people-related programs inclusive of leadership development, culture, engagement, labor relations, safety, communications, compensation, performance incentives, benefits, and well-being. Specifically, the Committee advises the TVA Board in areas of overall Board governance, CEO goals, performance, compensation, and succession planning. Emergent people issues are discussed by this Committee, or in TVA Board briefings, as appropriate. The TVA Board's Audit, Finance, Risk, and Cybersecurity Committee oversees TVA's compliance and ethics programs.

Inclusion with Diversity

In 2020, TVA added Inclusion as one of its core values and adopted IwD as an enterprise-wide transformational strategic element. Since then, IwD has become increasingly integrated into TVA’s daily operations. To accelerate the impact of IwD within TVA and the communities it serves, TVA is working to shape an inclusive work environment that values all voices, recognizes and sustains diversity as an imperative, leverages the public power model to advance IwD in all TVA communities, and establishes foundational principles and objectives to further understanding of workplace equity.

Inclusion is a journey, not a destination, and TVA made strides in 2023 to continue the progress, including the following initiatives and accomplishments:

•Increased the visibility of the IwD Council internally and externally;

•Published TVA’s second Diversity, Equity, Inclusion, and Accessibility ("DEIA") Report that details the progress made over the past year and its uncompromising commitment to build a more inclusive and equitable future;

•Established representation goals aimed at increasing the number of women and people of color in leadership;

•Signed an agreement with the Trades and Labor Council for Annual Employees to strengthen the diversity of the hiring pool;

•Increased supplier diversity through Ready Now, a mentorship program designed to prepare diverse small business owners to work with TVA;

•Incorporated performance goals focused on IwD for every leader to build an accountability framework for progress;

•Cultivated support for nine Employee Resource Groups ("ERGs") to encourage employee development and foster community;

•Continued focus and work with business units to incorporate recommendations from the independent diversity, equity, and inclusion assessment to improve people policies, processes, programs, and behaviors to further drive inclusion and equity across TVA;

•Improved TVA’s inclusion score, which measures sense of belonging, to above median at 75;

•Trained and supported leaders to deliver IwD content through forums that cover a range of DEIA topics specific to their business units, demonstrating the importance of an inclusive workplace;

•Held IwD Leadership Forum for TVA's union partners to provide information, tools, and strategies to help achieve TVA's 10-year enterprise diversity goals, celebrate progress made thus far, and discuss TVA's journey moving forward; and

•Maintained CEO accountability for reinforcement of IwD as an enterprise priority through assessment of the

CEO’s individual performance in 2023.

Table of Contents

TVA continues to advance IwD in the communities it serves and is enhancing its economic development program support for women-, minority-, and veteran-owned businesses. TVA has established a Supplier Diversity Stakeholder Advisory Council. One of the priorities of the council is the Supplier Diversity Mentoring Program, which is designed to support and position diverse suppliers seeking to do business with TVA. Specific skills enhancements include inventory management, technology integration, accounting practices, program implementation, and continuous improvement. In addition, TVA has strengthened and focused IwD in the communities TVA serves, as part of advancing the public power model at TVA. This was accomplished through support of TVA’s regional model, community engagement, and focused partnerships with deliberate outreach to LPCs and community-based organizations.

Employee Resource Groups. TVA is powered by its people and strengthened by its diversity. TVA supports nine ERGs to help strengthen an inclusive culture and make life better for the people it serves:

•ABLED Events — allows TVA employees to bring unique perspectives and gifts together as a united team to celebrate commonalities and differences through "Awareness Benefiting Leaders & Employees about disAbilities" in the workplace.

•ACTion — celebrates and honors the many Asian cultures represented within TVA, from Japan to India, and to the Philippines and beyond. It regularly highlights social events and supports career-enriching workshops.

•African American Voices — provides an avenue for African Americans and others interested in fellowship and smart career connections within TVA. It promotes mentoring and development opportunities, as well as group workshop events on such topics as personal branding, personal finance, and networking and negotiation skills.

•Council for Native Americans (new for 2023) — provides educational opportunities for the TVA workforce to learn and interact more with a focus on the cultural diversity of Native Americans, to help facilitate the growth of the Native American employee population in numbers, and to provide an avenue for Native Americans to share their cultural diversity. Its goal is to be a growing part of TVA's commitment to a sustainable, diverse, and inclusive workforce by highlighting the Native American history, various ethnicities, and community endeavors.

•New Employee Network — makes life easier for new employees entering a large company. It provides organizational information and cross-functional connections not only on the front-end to new employees but throughout an employee’s tenure at the company.

•Spectrum — highlights the open, accepting, and safe work environment TVA provides for all employees and focuses increasing visibility on educational and social opportunities on LGBTQ+ issues by offering employees a variety of community and professional networking opportunities within the Tennessee Valley.

•TVA & Amigos — provides an avenue for TVA's Hispanic employees and those interested in Latin culture to be involved in professional, educational, and service-oriented events.

•TVA Veterans Association — allows employees unique camaraderie opportunities as they support a wide array of local and national ceremonies and events and is one of the oldest and most active ERGs at TVA, with all branches of the military represented.

•Women Empowered — supports women at all stages of their careers and advocates for the equal rights of all female employees across TVA. This extends externally as TVA supports inclusion, networking, and developmental opportunities for girls and young women in local communities.

Together, TVA and its employees collectively champion personal and professional growth through a network of professional, social, and volunteer opportunities made available by each ERG and TVA’s diverse mix of employees.

Talent

The strength of TVA lies in the collective power from the diverse knowledge, experiences, and perspectives that its employees bring. To inspire the best from its people, TVA utilizes a talent management framework to deliver enterprise workforce needs supporting talent attraction, selection, development, engagement, and performance.

Attracting and Retaining Talent. TVA is enriched by the diversity of a talented, highly skilled workforce made up of people from all backgrounds. As an employer of choice across the seven-state service region, TVA endeavors to ensure that all qualified candidates receive fair consideration for open jobs at TVA. TVA actively engages with key community and university partners to recruit talent of all races, colors, sexual orientations, ethnicities, gender identities, abilities, religions, and ages. TVA continues to improve employment opportunities for underrepresented populations within TVA’s workforce through early career apprenticeships and internships.

Table of Contents

While TVA’s voluntary attrition rate reflected a slight year-over-year rise in 2022, voluntary attrition has returned to TVA’s historical rates prior to 2022. In addition, the TVA voluntary attrition rate continues to fall well below the national, utility, and government benchmarks. The majority of TVA's attrition is healthy attrition (e.g., retirements), and this is important because retention in early years of employment is key for maintaining healthy, inclusive pipelines at all levels in the organization. The stability that results from retaining talent is an area of strength that is critical to TVA’s success. TVA believes this is largely attributable to its People Advantage focus, which includes competitive compensation and comprehensive benefits programs, inclusion and well-being programs, flexible workplace practices, and an environment that promotes the retention of its complex and valuable workforce.

Competitive Total Rewards. TVA’s total rewards package is a significant factor in attracting and retaining top talent. TVA’s competitive benefits portfolio supports the values and needs of its employees. TVA provides market-based and competitive compensation which includes an annual incentive plan designed to reward accomplishments against established annual business and individual goals. All eligible employees participate in TVA's annual incentive plan, including TVA's represented employee population.

Additionally, in support of its cultural commitment to IwD, TVA periodically reviews compensation practices to promote fairness and equity. TVA has engaged third party vendors to conduct independent pay equity analyses and continues to monitor its pay practices and to provide its leaders with tools to assist in making equitable pay decisions.

To support and care for the well-being of employees and their families, TVA currently offers comprehensive and competitive benefits, including the following:


•medical, vision, dental, life, accident, and disability insurance	•flexible spending accounts •tuition reimbursement	•well-being incentives •employee assistance programs
•behavioral and medical telemedicine	•401(k) retirement	•family caregiving benefits
•leave donation	•dependent scholarship program	•family building benefits
•maternity leave	•paid parental leave	•flexible work schedules
•paid time-off	•health savings account

Development and Training. As TVA continues to adapt to the evolving demands of the industry, it is imperative that it cultivate a work environment that motivates people to do their best work by aligning employee development, skills, and capabilities with what TVA needs to succeed now and in the future. TVA provides multiple training and development opportunities at all employee levels. Those opportunities include:


•individual learning-ability	•team learning	•mentoring
•career pathing, including rotational development	•professional, technical, and leadership career pathways	•33 craft apprenticeship programs
•over 15,300 on-line learning courses

TVA also invests in the development of its employees through tuition reimbursement for academic programs aligned with TVA’s business and workforce development needs. In addition, employees engaged in over 715,000 hours of training in 2023.

Leadership Development and Succession Planning. TVA encourages personal and professional development and has strategic leadership development programs designed to prepare employees to step into leadership positions and to accept the additional responsibilities, expectations, and challenges faced by each level of leadership. TVA also has advanced leadership programs designed to further prepare leaders for executive level positions, which require an extensive interview and assessment process for selection. Through TVA’s talent review and succession planning program, 98 percent of director and executive level roles have at least one succession candidate identified, with 93 percent having at least one ready-now succession candidate.

Continuous focus on and support of leadership development is maintained through means such as talent discussions at least annually at every level of the organization, which include attention to developing a diverse leadership pipeline. TVA has established goals for female and people of color representation in leadership and plans to update these goals to continuously improve this representation.

Engagement

Strong engagement levels impact all TVA strategic priorities. TVA's work in this key area is focused on ensuring TVA is providing the tools and education to support employee's well-being, leveraging flexibility to support and engage the workforce,

Table of Contents

and strengthening relationships with TVA's union partners to ensure employees feel heard.

Employee Engagement Survey. TVA’s Employee Engagement Survey is a key tool for understanding and leveraging the employee voice. The survey is administered a minimum of annually to all employees and measures overall engagement and drivers of engagement. The survey results provide real-time insights and analytics and are compared to a normative database comprised of other relative external benchmarks to help identify strengths and opportunities for improvement. Results from the surveys are shared with employees and used by TVA leadership and business units to improve and monitor progress against People Advantage objectives. Two scores are used as key People Advantage metrics: Engagement, which measures the sense of commitment and involvement, and Inclusion, which measures the sense of belonging at work. See Key Metrics below for Engagement and Inclusion scores.

Workplace Flexibility. As part of its People Advantage strategic priority, TVA strives to create a work environment that is welcoming, supportive, and responsive to the changing needs of the workforce. As the world around TVA has considerably shifted over the past few years, TVA's employees continue to show a remarkable ability to adapt and persevere as they make a difference in communities across the Tennessee Valley. While recognizing hybrid environments means fewer individuals in office locations, TVA is exploring how to best enable its employees to work everywhere across the Tennessee Valley. TVA is evaluating its facilities and workspace options with the objective to transform its facilities into a resource that enables the future of work, while enhancing TVA's engagement and presence within the communities TVA serves. As always, TVA is committed to being a valued, trusted partner in the communities where TVA employees live and serve.

Safety, Employee Health, and Well-being. Safety is one of TVA’s core values. TVA's safety program is based on the fundamentals of a safety management system, which includes management commitment, employee engagement, hazard recognition and control, worksite analysis, contractor safety management, training, review, and continuous improvement. TVA’s safety training aims to educate employees on the elements of the safety program and foster a culture of awareness. Employee engagement is critical to the success of the program. TVA's vital safety behaviors are employee-driven and developed with the collaboration of represented employees, union leadership, and management. As a federal agency, TVA is also required to complete regulatory compliance inspections of its facilities on an annual basis.

In 2023, TVA Safety continued to expand efforts around contractor safety oversight and to improve field engagement. TVA also focused on engaging with industry leaders and developing internal safety talent through participation in the Middle Tennessee Occupational Safety and Health Administration Council, the American Society of Occupational Safety Professional Executive Forum Alliance, the Construction Safety Research board of advisors, and Edison Electric Institute, and sitting on the Department of Labor’s Federal Advisory Council on Occupational Safety and Health.

TVA has provided support for its employees to ensure the retention of valuable talent and to enhance well-being. This support includes emergency back-up care support for child and adult dependents, establishing a mental health advocacy program, providing unlimited Employee Assistance Program sessions, enhancing paid leave, and providing tutoring resources. TVA’s safety and well-being accomplishments in 2023 include an increased effort and focus on developing proactive and preventative leading indicators of the safety program, improving employee engagement, strengthening procedural and regulatory/compliance framework, and obtaining top decile serious injury performance based on the most recent data available.

Partnerships with Unions. TVA has a long-standing policy of acknowledging and working with recognized representatives of its employees, and that policy is reflected in long-term agreements to recognize the unions (or their successors) that represent TVA employees. TVA’s labor construct is complex and unique and is primarily governed by the TVA Act. Neither the federal labor relations laws covering most private sector employers, nor those covering most federal agencies, apply to TVA.

TVA’s labor strategy is critical to the achievement of its strategic priorities as it prepares the workforce for the future. Its employees are represented by six collective bargaining agreements and nine labor unions. This reflects 58% of TVA's workforce, or approximately 6,000 employees. With the addition of collective bargaining agreements and labor unions for TVA's contractors, there are a total of nine collective bargaining agreements and 17 labor unions. TVA’s partnerships with these unions go back more than 80 years and form the backbone of TVA and its ability to serve the people of the Tennessee Valley.

Recent accomplishments to strengthen the relationship between TVA and its labor unions include integrating union partners in TVA’s comprehensive workforce optimization strategy, in alignment with operational and asset transition strategies that position TVA to meet strategic imperatives over the next decade; negotiating a three-year wage agreement between TVA and the Office and Professional Employees International Union through September 2026; and collaborating with IwD to hold the first ever IwD Forum with union leaders to align on how TVA and the union work together to reach goals for a skilled workforce representative of the Tennessee Valley.

Table of Contents

Awards

Awards and other recognition help TVA understand its strengths, identify opportunities for improvement, bolster employee pride, and better attract and retain diverse talent. 2023 TVA recognition included:


•2022-2023 – Ethisphere® Compliance Leader VerificationTM – first federal agency to receive certification			•2023 Military Friendly® Brand – Rank "Designated"
•2023 National Organization on Disability – Leading Disability Employer			•2023 Military Friendly® Employers – Ranked No. 4
•2023 Fair360 – Top Companies for Utilities Award – Ranked No. 3; Top Regional Companies - No. 12			•2023 Military Friendly® Military Spouse Friendly Employers - Ranked No. 7
•2023 VETS Indexes Employer Awards – VETS Indexes 5-Star Employer			•2023 Military Friendly® Supplier Diversity Program Award – Ranked No. 1; Top 10, four years in a row
•2023 Forbes America's Best Employers By State - Ranked No. 8 in Tennessee			•One of the largest U.S. Contributors to Helmets to Hardhats Program

Key Metrics

TVA actively monitors internal metrics to remain aware of human capital trends and to strive to ensure that it is making measurable progress on its People Advantage objectives. Through monitoring sources such as data and performance dashboards, one-on-one engagements between leaders and employees, and engagement surveys, TVA obtains information that helps it understand its performance and make adjustments, as needed.

Key measures of success in TVA’s People Advantage strategic priority are set forth below:


	Goal		Actual
Performance Measure	2024		2023		2022
People of color representation in leadership (%) (1)	12.0	%	10.9	%	10.4	%
Female representation in leadership (%) (1)	21.0	%	19.7	%	19.2	%
Diverse external hires (%) (2)	40.0	%	41.4	%	41.4	%

Voluntary attrition (%) (3)	2.4	%	1.4	%	2.4	%
Engagement (100-point scale) (4)	Top Quartile (≥79)		81		81
Inclusion (100-point scale) (5)	Median (≥72)		75		72
Recordable injuries (#) (6)	28		32		54
Serious injury incident rate (7)	0.00		0.02		0.02
Serious injury incidents (7)	0		3		2
Ethics violations(8)	0		23		28

Notes

(1) Defined as first line supervisors and above.

(2) Defined as external hires who are female, persons of color, or persons with disabilities.

(3) Voluntary attrition measures and accounts for all employees who leave the business voluntarily during a fiscal year. 2023 voluntary attrition rates have realigned to former pre-pandemic rates for TVA, significantly below those of the greater external market.

(4) Based on score from Employee Engagement Survey defined as degree to which employees invest their cognitive, emotional, and behavioral energies toward positive organizational outcomes. Benchmark data is provided by the third-party administrator of the survey, based on data collected from over 750 organizations. Benchmarks are updated at least annually using data from the previous 12-month period.

(5) Based on score from Employee Engagement Survey defined as the degree to which employees sense they belong at work. Benchmark data is provided by the third-party administrator of the survey, based on data collected from over 750 organizations. Benchmarks are updated at least annually using data from the previous 12-month period.

(6) Retroactive cases can affect annual recordable injury counts reported.

(7) Based on the Edison Electric Institute criteria developed by industry peers.

(8) Ethics violations are determined by performing a comprehensive assessment across TVA of substantiated ethics violations involving violation of ethical laws or TVA's Code of Conduct; refusal or failure to cooperate with investigations; violation of equal opportunity policies or remedial actions; mishandling of classified information, privacy information, or security incidents; misuse of government property or official time; theft or unauthorized possession of property; falsification of safety-related documents; falsification or failure to correct TVA documents; and associated disciplinary and/or corrective actions taken.

Table of Contents

Workforce Demographics


Employee Demographics	2023	2022
Number of employees on September 30	10,901	10,390
Employees represented by collective bargaining unit	58% of employees represented, or approximately 6,000 employees	58% of employees represented, or approximately 6,000 employees
Trades and labor employees	3,293	3,198
Average tenure (years)	12	13
Average age	45.4	45.7


	All Employees		Leadership		New Hires
	2023	2022	2023	2022	2023	2022
Female	2,289	2,159	309	288	267	276

People of Color	1,363	1,227	171	156	206	186
Military, Veteran	1,883	1,822	336	315	148	122
Disabled	844	773	134	114	44	38

Note

All data is based upon self-reported information provided to TVA.

In addition to the employees above, TVA also had approximately 15,600 and 16,200 contractors on September 30, 2023 and 2022, respectively, providing intermittent or full-time services. The majority of these contractors are managed by TVA suppliers that are providing services to TVA.

Table of Contents

ITEM 1A. RISK FACTORS

The risk factors described below, as well as the other information included in this Annual Report on Form 10-K for the fiscal year ended September 30, 2023 (the "Annual Report"), should be carefully considered. Risks and uncertainties described in these risk factors could cause future results of TVA operations to differ materially from historical results as well as from the results anticipated in forward-looking statements. Although the risk factors described below are the ones that TVA considers material, additional risk factors that are not presently known to TVA or that TVA presently does not consider material may also impact TVA's business operations. See Forward Looking Information above for a description of some matters that could affect the below risks or generate new risks. The occurrence of any of the following could have a material adverse effect on TVA's cash flows, results of operations, or financial condition.

For ease of reference, the risk factors are presented in eight categories: (1) regulatory, legislative, and legal risks; (2) cybersecurity and information technology risks; (3) operational risks; (4) financial, economic, and market risks; (5) human capital and management risks; (6) risks related to the environment and catastrophic events; (7) accounting and financial reporting risks; and (8) general risk factors.

REGULATORY, LEGISLATIVE, AND LEGAL RISKS

Existing laws, regulations, and orders may negatively affect TVA's cash flows, results of operations, and financial condition, as well as the way TVA conducts its business.

TVA is required to comply with comprehensive and complex laws, regulations, and orders. The costs of complying with these laws, regulations, and orders are substantial, and costs could be significantly more than TVA anticipates, especially with respect to environmental and nuclear compliance. In addition, TVA is required to obtain numerous permits and approvals from governmental agencies that regulate its business, and TVA may be unable to obtain or maintain all desired regulatory approvals. If there were a delay in obtaining desired regulatory approvals or if TVA were to fail to obtain or maintain any approvals or to comply with any law, regulation, or order, TVA may have to change how it operates certain assets, may be unable to operate certain assets, or may have to pay fines or penalties for continuing to operate the assets. Any resulting changes in the manner in which TVA conducts its business could require TVA to make substantial additional capital expenditures or abandon certain projects and could negatively affect TVA's cash flows, results of operations, and financial condition.

TVA's governmental status may interfere with its ability to quickly respond to the needs of its current or potential customers or to act solely in the interest of its ratepayers.

As a governmental entity, TVA has certain legal requirements that prevent it from responding as quickly to potential changes in the market or requests from current or potential customers as might be desired or in comparison to other utilities. For example, TVA is required to comply with the National Environmental Policy Act ("NEPA"), which requires environmental reviews to be completed before TVA decides to pursue certain projects. The delay in responding to requests could damage relationships with current customers, deter potential customers from moving into TVA's service territory, or damage TVA's reputation.

TVA's nature as a governmental entity imposes additional pressures that most companies do not face, including most significantly the requirements to support economic development, simultaneously manage a river system for commerce, recreation, flood control, and power generation, and promote recreational opportunities within its service territory.

TVA funds these operations almost entirely from the sale of electricity. In addition, TVA must balance these obligations with the requirement to provide power at the lowest feasible rates. If TVA does not adequately communicate how it fulfills its various missions and the value it provides, its reputation may be harmed, which may result in political pressure to change its nature or operations as well as in the loss of public support.

TVA is involved in various legal and administrative proceedings, the outcomes of which may affect TVA's finances and operations.

TVA is involved in a wide range of legal and administrative proceedings and is likely to become involved in future additional proceedings in the ordinary course of business or as a result of, among other things, catastrophic events or environmental conditions arising from TVA property or areas where TVA has disposed of materials or property. The additional proceedings could involve, among other things, challenges to TVA’s CCR facilities, challenges to TVA's natural gas-fired plants and related pipelines, nuisance suits involving TVA’s coal-fired plants, challenges to the anti-cherrypicking provision, challenges under NEPA, challenges under the Freedom of Information Act, and challenges to TVA’s authority to set rates and enter into contracts. Although TVA cannot predict the outcome of the individual matters in which TVA is involved or will become involved, the resolution of these matters could require TVA to make expenditures in excess of established reserves and in substantial amounts. Similarly, resolution of any such proceedings may require TVA to change its business practices or procedures, incur additional capital or operational expense, change how it operates its fossil-fueled units, cease construction of new natural gas-fired plants, reduce

Table of Contents

emissions to a greater extent than TVA had planned, close existing CCR facilities sooner than planned, close existing CCR facilities using a different methodology than planned, build new CCR facilities sooner than planned, build new CCR facilities that were not planned, cease operation of some coal-fired units, adjust its rates, or terminate or modify contracts. These events individually or in the aggregate could have a material adverse effect on TVA’s cash flows, results of operations, and financial condition. For a discussion of certain current material legal proceedings, see Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges and Note 22 — Commitments and Contingencies — Legal Proceedings.

New laws, regulations, or administrative or executive orders, or congressional actions or inactions, may negatively affect TVA's cash flows, results of operations, and financial condition, as well as the way TVA conducts its business in ways that are different from most other utilities.

Because TVA is a corporate agency and instrumentality established by federal law, it may be affected by a variety of laws, regulations, and administrative or executive orders that do not directly apply to other electric utilities and may be subject to potential stakeholder activism. For example, federal legislation may expand or reduce TVA's activities, change its governance structure, require TVA to sell some or all of the assets that it operates, require TVA to take certain other operational or regulatory actions, reduce or eliminate the United States' ownership of TVA, or even liquidate TVA. Congress could act, or fail to take action, on various issues that may impact TVA, including but not limited to action or inaction related to the national debt ceiling or automatic spending cuts in government programs. Furthermore, federal administrative or executive orders could induce TVA to change the way it conducts its business. See Item 1, Business — Environmental Matters — Climate Change — Executive Actions for a discussion of recent executive actions regarding climate change.

Although it is difficult to predict new laws, regulations, or administrative or executive orders, or congressional action or inaction, or how such laws, regulation, orders, actions, or inactions may impact TVA, some of the possible effects are described below.

TVA could lose its protected service territory.

TVA’s service area is defined primarily by provisions of law and long-term contracts. The fence limits the region in which TVA or LPCs that distribute TVA power may provide power. The anti-cherrypicking provision precludes FERC from ordering TVA to transmit power for others if that power would be consumed within the TVA service area. State service territory laws limit unregulated third parties’ ability to sell electricity to consumers. From time to time, there have been efforts to circumvent the protection of the anti-cherrypicking provision. In addition, the protections afforded by the anti-cherrypicking provision conceivably could be affected by future federal legislation. If FERC were to limit the application of the anti-cherrypicking provision or if federal legislation were to eliminate or limit the application of the anti-cherrypicking provision without corresponding legislative modifications to the territorial limitations imposed by the fence, TVA's ability to respond to any resulting customer attrition would be constrained. Because TVA's ability to expand its customer base is constrained by the fence, reductions in demand have to be offset by such actions as reducing TVA’s internal costs or increasing rates. Any failure of such measures to fully offset the reduced demand for power may negatively affect TVA’s cash flows, results of operations, and financial condition.

TVA may become subject to additional environmental regulation.

New environmental laws, regulations, or orders may become applicable to TVA or the facilities it operates, and existing environmental laws or regulations may be revised or reinterpreted in a way that adversely affects TVA. For example, the EPA has recently interpreted its CCR Rule in a way that could create significant additional costs with implementing closure-in-place. This interpretation, as well as other interpretations, laws, regulations, or orders, could substantially increase TVA's cost of operations, prompt the early retirement of generation facilities, require significant capital expenditures, or cause TVA to change its methodology for closing CCR facilities. Possible areas of future laws or regulations include, but are not limited to, GHGs, CCR, ELGs, water quality, air quality, renewable energy portfolio standards, and natural gas production and transmission. See Item 1, Business — Environmental Matters — Clean Air Act Programs and Regulations for a discussion of the EPA's proposed greenhouse gas emission standards and guidelines, Item 1, Business — Environmental Matters — Water Quality Control Developments for a discussion of the EPA's proposed effluent limitation guidelines, Item 1, Business — Environmental Matters — Cleanup of Solid and Hazardous Wastes — Coal Combustion Residuals for a discussion of proposed revisions to the EPA's CCR Rule, and Item 1, Business — Environmental Matters — Climate Change — Executive Actions for a discussion of recent executive actions regarding climate change. Litigation may affect the timing and requirements of new regulatory proposals or may indirectly affect TVA, potentially even when TVA is not involved. Failure to comply with environmental requirements can result in enforcement actions and litigation, which can lead to the imposition of significant civil liability, including fines and penalties, criminal sanctions, and/or temporary or permanent closure of non-compliant facilities.

TVA may become subject to additional NERC requirements.

Table of Contents

TVA is subject to federal reliability standards that are set forth by NERC and approved by FERC. TVA recognizes that reliability standards and expectations continue to become more complex and stringent for transmission systems. If TVA fails to comply with the mandatory reliability standards, TVA could be subject to increased compliance obligations. Complying with these or additional requirements set forth by NERC may require significant capital expenditures and may negatively affect TVA's cash flows, results of operations, and financial condition.

TVA could become subject to other federal legislation aimed specifically at curtailing TVA’s activities.

In addition to potential adverse impacts from changes to more general laws and regulations, because of TVA’s federal-entity status, TVA could become subject to laws or other restraints specifically aimed at TVA, including but not limited to the following examples.

Divestment or Forced Sale of TVA Assets. From time to time, federal officials have suggested that the federal government should either divest TVA or require TVA to sell some or all of its assets, including its transmission system. Either event could trigger change of control provisions in certain material contracts or covenants in TVA’s bond documents that concern the sale or disposal of a substantial portion of TVA’s power properties. See Item 2, Properties — Disposal of Property. TVA may then, among other things, be required to pay off debt more quickly than anticipated, be unable to access credit facilities, or both. Additionally, the loss of the transmission system could interfere with TVA’s operations and require TVA to contract for the transmission of electricity to customers, likely at a higher cost. These factors could negatively affect TVA’s operations, change the way it conducts such operations, and increase costs.

Restriction on TVA Accessing or Controlling Its Funds. Other federal entities may attempt to restrict TVA’s ability to access or control its funds that are on deposit in TVA’s account in the U.S. Treasury. For example, should the U.S. Treasury approach its debt ceiling, the U.S. Treasury might, as part of an effort to control cash disbursements, attempt to require TVA to receive approval before disbursement of funds from TVA’s U.S. Treasury account. Additionally, the OMB might, in the event that automatic spending cuts go into effect, attempt to require TVA to reduce its budget by a specified percentage (although the legal applicability of such a situation to TVA would depend upon the specific legislation making the automatic spending cuts). Such attempts to restrict TVA’s ability to control or allocate funds could adversely affect TVA’s cash flows, results of operations, financial condition, business relationships, the way it conducts its business, and its reputation.

Loss of TVA’s Sole Authority to Set Rates. Under the TVA Act, the TVA Board has the sole authority to set the rates that TVA charges for electricity, and these rates are not subject to further regulation. This authority provides the TVA Board the flexibility to set rates at a level sufficient to generate adequate revenues to service TVA’s financial obligations, properly operate and maintain its assets, and provide for reinvestment in its power program. If the TVA Board were to lose this authority, or if such authority were to be restricted, such as through becoming subject to an external review process or other regulatory oversight, such an occurrence could result in material adverse impacts on TVA’s ability to meet financial obligations, operate its system in a manner that it considers most efficient or appropriate, or adapt its business to changing circumstances, and could potentially result in stranded costs.

Loss of TVA’s Authority to Manage the Tennessee River System. TVA’s management of the Tennessee River system helps TVA effectively operate its power system. TVA’s ability to integrate management of the Tennessee River system with power system operations increases power system reliability and reduces costs. Restrictions on how TVA manages the Tennessee River system could negatively affect its operations or increase costs.

Lowering of TVA’s Debt Ceiling. The TVA Act provides that TVA may issue Bonds in an amount not to exceed $30.0 billion outstanding at any time. On September 30, 2023, TVA had $19.5 billion of Bonds outstanding (not including non-cash items of foreign currency exchange gain of $109 million, unamortized debt issue costs of $41 million, and net discount on sale of Bonds of $85 million). Future federal legislation could lower TVA’s debt ceiling or broaden the types of financial instruments that are covered by the ceiling, thus inhibiting TVA’s ability to raise capital necessary for essential business functions or for investing in carbon free technologies.

Loss or Limitation of TVA’s Authority to Manage Real Property Currently Entrusted to TVA. TVA’s management of real property containing power generation and transmission structures, as well as that consisting of reservoir shorelines, is important for the effective operation of the power system. Restrictions on or the loss of the authority to manage these properties could negatively affect TVA’s operations or increase costs.

CYBERSECURITY AND INFORMATION TECHNOLOGY RISKS

TVA’s facilities and information infrastructure may not operate as planned due to cyber threats to TVA’s assets and operations.

Table of Contents

TVA’s operations are heavily computerized and include assets such as information technology and networking systems. As with all industries, the reliance on computerization and networking makes TVA a target for cyber attacks, and the risk of such attacks may increase as individual devices and equipment become accessible via the internet. TVA has been targeted by cyber attacks in the past and anticipates that it will be targeted in the future. These attacks may have been carried out, or in the future could be carried out, by individuals, groups, or nation states. TVA employs extensive cyber safeguards and works with industry specialists and relevant governmental authorities to deter, stop, or mitigate cyber attacks. Despite implementation of these security measures, TVA's facilities and information infrastructure may be subject to or vulnerable to disability, failures, or unauthorized access. Furthermore, as technology becomes more prevalent in energy infrastructure, TVA's infrastructure may be subject to increased cyber vulnerability in the future. Cyber attacks could come through one or more of a number of means, such as computer viruses, malicious or destructive code, phishing attacks, denial of service attacks, or ransomware. Cyber attacks may result in security breaches that may be detrimental to TVA's operations, including third parties' improperly accessing TVA's system and demanding ransom based on threats to expose sensitive data, including data from employees, customers, and financial parties, to gain operational control, or to expose security vulnerabilities specific to TVA’s facilities. In such a case, a cyber attack could compromise sensitive data, significantly disrupt operations, require additional expenditures for cybersecurity, negatively affect TVA’s cash flows, results of operations, financial condition, and reputation, and pose health and safety risks to TVA personnel and the customers and communities that TVA serves.

Because the investigation of any cybersecurity breach is inherently unpredictable and would require substantial time to complete, TVA may not be able to quickly remediate the consequences of any breach, which may increase the costs and enhance the negative consequences associated with a breach. Additionally, the theft, damage, or improper disclosure of sensitive data may subject TVA to penalties and claims from third parties or increased government oversight.

Cyber attacks on third parties or the failure of their technology infrastructure could interfere with or harm TVA.

Many third parties on which TVA relies for services, including for transferring funds to non-TVA entities or receiving delivery of products in the ordinary course of business, are heavily computerized and use assets such as information technology and networking systems. These providers' systems are susceptible to cybersecurity and data breaches and outages from fire, floods, power loss, telecommunications failures, physical attack, and similar events. If any of these third parties were to experience interferences from cyber attacks or significant system failures or outages, which events have occurred in the past and may occur again in the future, the services they provide TVA could be disrupted. This disruption could interfere with TVA’s ability to perform its obligations to others, transfer funds, obtain fuel or critical parts, supplies, or services, or make payments, which in turn could negatively affect TVA’s cash flows, results of operations, financial condition, and reputation. Additionally, the theft, damage, or improper disclosure of sensitive data held by these third parties may subject TVA to further harm. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Safeguarding Assets — Cybersecurity for a discussion of recent cyber attacks on third parties.

The failure of TVA’s information technology systems could have adverse consequences to TVA.

TVA’s operations are dependent upon the proper functioning of its internal systems, including the information technology systems that support TVA’s underlying business processes. Any significant failure or malfunction of such information technology systems may result in disruptions of TVA’s operations. TVA relies on information technology systems, including the internet and cloud systems, to support a variety of business processes and activities and to store sensitive data. Some of TVA’s information technology systems may be dependent upon cloud service providers. These providers’ systems are susceptible to cybersecurity and data breaches and outages from fire, floods, power loss, telecommunications failures, security violations, and similar events. Failure to prevent or mitigate data loss from system failures or outages could materially affect the results of operations, financial condition, and cash flows of TVA.

The emergence of artificial intelligence technology could harm TVA.

TVA’s sensitive information may be subject to improper disclosure or fabrication by artificial intelligence (“AI”) and machine learning technologies on systems external to TVA, leading to compromises in cybersecurity. AI and machine learning technology may also be flawed, and data sets used in generative AI may be insufficient or contain biased, incorrect, or incomplete information. Additionally, the lack of governance and regulatory requirements for AI systems may make it difficult for TVA to create compliance standards for employee AI usage and may make the intellectual property ownership and license rights to certain information unclear. TVA could suffer reputational damage or face operational challenges as a result of any inconsistencies or flaws in the application of AI or machine learning technology.

OPERATIONAL RISKS

TVA may incur delays and additional costs in its major projects or may be unable to obtain necessary regulatory approval for them.

Table of Contents

Among other projects, TVA is building new natural gas-fired generation facilities, seeking to improve the reliability and resiliency of its transmission system, undertaking repairs at certain hydroelectric facilities and dams, and closing some coal-fired plants and their supporting infrastructure. These activities involve risks of overruns in the cost of labor and materials, as well as potential delays, in beginning or completing these repairs, closures, or other projects. Further cancellation or delay of projects related to these activities may adversely affect TVA's cash flows, financial condition, and results of operations. Such cancellation or delays may result from, among other things, changes in market conditions, changes in laws or regulations, lack of productivity, human error, supply chain challenges, regional health emergencies, and the failure to schedule activities properly, TVA's inability to obtain the necessary regulatory approvals or licenses, TVA's decision to cancel construction of a facility or cancel another type of project, including due to delays, cost overruns, or changes in customer preferences, or changes in requirements applicable to how TVA conducts construction, repair, or closure activities. Further, if projects are not completed according to specifications, TVA may suffer, among other things, delays in receiving licenses, reduced plant efficiency, reduced transmission system integrity and reliability, and higher operating costs.

TVA's determination of the appropriate mix of generation assets is based on assumptions that may prove inaccurate.

TVA has determined that its power generation assets should consist of a mix of nuclear, coal-fired, natural gas-fired, and renewable power sources, including hydroelectric. In making this determination, TVA took various factors into consideration, including the anticipated availability of its nuclear units, the availability of non-nuclear facilities, the forecasted cost of natural gas and coal, the forecasted demand for electricity, its carbon reduction aspirations, and environmental compliance including the expense of adding air pollution controls to its coal-fired units. If any of these assumptions materially change or are impacted by subsequent events, TVA's generation mix may not address its operational needs in the most efficient and cost-effective manner. Additionally, reallocating the mix of power generation assets from the planned mix may result in additional capital and operational expense. Furthermore, achieving TVA's carbon reduction aspirations may require TVA to make significant capital investments, including investments in new technologies. TVA may retire coal-fired and natural-gas fired generation facilities sooner than planned in order to meet carbon reduction aspirations, which also may require significant capital expenditures or additional power purchases, potentially causing an adverse effect on TVA's cash flows, results of operations, financial condition, and reputation.

TVA may not be able to meet its carbon reduction aspirations, which may result in additional capital expenditures or higher operating expense.

The achievement of TVA's carbon reduction aspirations, and its ability to maintain system reliability during the transition to cleaner forms of energy, is subject to numerous risks beyond TVA's control that are difficult to predict and may prevent TVA from timely achieving such aspirations. Occurrences that may prevent TVA from achieving its carbon reduction aspirations in a timely manner include, but are not limited to, the following:

•Federal law or policy could restrict TVA's ability to use natural gas or nuclear power, which are each essential for TVA to reduce its carbon emissions.

•TVA may not receive timely approval from federal and state regulators for construction and operation of new natural gas assets and attendant infrastructure (e.g., pipelines).

•TVA may have difficulty obtaining resources or labor needed to complete projects on time and within budget.

•Legal challenges may slow or restrict TVA's ability to replace coal generation with cleaner forms of energy. These challenges may, for instance, come in the form of direct legal challenges to TVA projects or through challenges to TVA's environmental reviews or TVA's attempts to obtain necessary licenses and permits.

•Potential delays in projects, along with now-anticipated load growth, may force TVA to rely on coal-fired generation more heavily, or longer, than it had previously projected.

•As to TVA's longer term carbon reduction aspirations, the development of new technology necessary to meet these aspirations may not occur as quickly, feasibly, or cost-effectively as necessary.

•TVA's unique federal least-cost planning obligations may prevent TVA from moving forward with carbon-free generation as quickly as utilities that do not have the same requirements.

TVA faces certain risks arising solely from its operation of nuclear units.

TVA has seven operating nuclear units. Unique risks associated with these units include the following:

Hazard Risks. Hazards exist with the use of radioactive material in energy production, including management, handling, storage, and disposal. Further, a nuclear incident at one of TVA's facilities could have significant consequences including loss of life, damage to the environment, damage to or loss of the facility, and damage to non-TVA property. Although TVA carries certain types of nuclear insurance, the amount that TVA is required to pay in connection with a nuclear incident could significantly exceed the amount of coverage provided by insurance. The licensee of each nuclear reactor has a contingent obligation to pay a retrospective premium, equal to its proportionate share of the loss in excess of the primary level, regardless of proximity to the incident of fault, up to a maximum of approximately $138 million per reactor, per incident. With TVA's seven reactors, the maximum total contingent obligation per incident is $963 million. This retrospective premium is payable at a maximum rate

Table of Contents

currently set at approximately $20 million per year, per incident, per reactor. In addition, following an incident TVA may have to pay retrospective insurance premiums, and may experience a reduction in the availability of nuclear insurance, an increase in the cost of nuclear insurance, an increase in the costs of operating nuclear units, or increased regulation or restrictions on the construction, operation, and decommissioning of nuclear facilities. Moreover, federal legislation could impose revenue-raising measures on the nuclear industry to pay claims exceeding the limit for a single incident under the Price-Anderson Act. Further, the availability or price of insurance may be impacted by TVA's acts or omissions, such as a failure to properly maintain a facility, or events outside of TVA's control, such as an equipment manufacturer's inability to meet a guideline, specification, or requirement.

Decommissioning Costs. TVA maintains a Nuclear Decommissioning Trust ("NDT") for the purpose of providing funds to decommission its nuclear facilities. The NDT is invested in securities generally designed to achieve a return in line with overall equity and debt market performance. See Note 16 — Fair Value Measurements — Investment Funds for the NDT balance at September 30, 2023. TVA might have to make unplanned contributions to the NDT if, among other things:

•The value of the investments in the NDT declines significantly or the investments fail to achieve the assumed real rate of return;

•The decommissioning funding requirements are changed by law or regulation;

•The assumed real rate of return on plan assets, which is currently five percent, is lowered by the TVA Board or the actual real rate of return does not achieve the assumed rate;

•The actual costs of decommissioning are more than planned;

•Changes in technology and experience related to decommissioning cause decommissioning cost estimates to increase significantly;

•TVA is required to decommission a nuclear plant sooner than it anticipates; or

•The NRC guidelines for calculating the minimum amount of funds necessary for decommissioning activities are significantly changed.

If TVA were to have to make additional contributions to the NDT, the contributions may negatively affect TVA's cash flows, results of operations, and financial condition.

Regulatory Risks. The NRC has broad authority to adopt regulations related to the licensing, operating, and decommissioning of nuclear generation facilities and may adopt regulations as a result of events that occur at nuclear facilities in the U.S. or throughout the world, such as the events that occurred at Fukushima in 2011. These regulations can result in significant restrictions or requirements on TVA. To comply with existing, new, or modified regulations, TVA may be required to make substantial capital expenditures at its nuclear plants or make substantial contributions to the NDT. In addition, if TVA were to fail to comply with requirements promulgated by the NRC, the NRC has the authority to impose fines, shut down units, or modify, suspend, or revoke TVA's operating licenses. Moreover, the NRC may not approve future requests from TVA to extend the operating licenses for its nuclear units.

Waste Disposal. TVA's nuclear operations produce various types of nuclear waste materials, including spent fuel. TVA has been storing the spent fuel in accordance with NRC regulations in anticipation that a final storage site for all such waste will be developed and put in operation by the U.S. government. If no such site is forthcoming or if no alternative disposal or reuse plan were developed, TVA might be required to arrange for the safe and permanent disposal of the spent fuel itself. Such a requirement would cause TVA to incur substantial expense, including substantial capital expenditures, and could cause TVA to change how it operates its nuclear plants.

Availability of Components. Nuclear facilities require specialized components and access to intellectual property for operation. As the number of reliable suppliers of such components decreases and access to intellectual property is reduced, the availability of the components and access to the intellectual property also will likely decrease. If TVA were unable to secure either the original components, intellectual property, or replacements approved for use by the NRC, TVA might have to change how it conducts its operations, which may result in substantial expense. Further, limitations on global trade resulting from the Coronavirus Disease 2019 ("COVID-19") or limitations on global shipping could materially decrease the availability or increase the cost of necessary or desired equipment.

TVA may not be able to operate one or more of its nuclear power units.

If operating issues were to develop with certain TVA nuclear power units that were not correctable, TVA may choose to shut down one or more units or be ordered to do so by the NRC. Returning the unit(s) to operation could be a lengthy and expensive process, or might not be feasible depending on circumstances. In either case, TVA's cash flows, results of operations, financial condition, and reputation may be negatively affected. Not being able to operate all of TVA's nuclear units may cause TVA to rely more on forms of generation that produce more carbon, thus making it more difficult for TVA to meet its carbon reduction aspirations or meet reliability goals.

Table of Contents

TVA's management and operation of CCR facilities expose it to additional costs and risks.

TVA operates coal-fired units which produce CCR as byproducts of the power production process. TVA contains its CCR in dedicated facilities operated by TVA. TVA has closed some of these facilities and is in the process of closing others. Many of these facilities do not have liners, as they were constructed prior to the requirement that such facilities be built with liners. TVA has been ordered by TDEC to undertake investigations at all CCR facilities in Tennessee. TVA has also been involved in litigation related to certain CCR facilities, and to resolve one such lawsuit, TVA agreed to remove or beneficially reuse significant amounts of CCR material at Gallatin Fossil Plant ("Gallatin"). TVA could be subject to similar litigation or orders in the future and could be required to restrict or stop the use of some or all CCR facilities that were not required to be closed by the CCR Rule or relocate CCR material to lined facilities. Further, TVA has decided to move all CCR material at Allen Fossil Plant rather than closing the CCR facilities in place as originally planned, and moving the CCR material subjects TVA to additional costs and transportation-related risks. TVA may change its closure plans at other facilities depending on the particular facts of each situation as well as new laws, regulations, orders, or interpretations, such as the EPA's recent interpretation of its CCR Rule that could create significant additional costs with implementing closure, subject to the completion of any required environmental investigations or studies and any required approval of appropriate state regulators. The ultimate resolution of matters relating to CCR obligations could have a material adverse effect on TVA's cash flows, results of operation, and financial condition.

Physical attacks, threats, or other interference could damage or interfere with TVA's facilities and operations.

TVA has an extensive generation and transmission system and supporting infrastructure that includes, among other things, TVA's generation facilities and transmission infrastructure such as substations, towers, and control centers. Some of TVA's hydroelectric facilities include navigation locks for commerce along the Tennessee River system. TVA also operates flood control dams and supporting infrastructure. Because of TVA's status as a government corporation and TVA's role as the primary power provider for its service territory, individuals, groups, or nation states may target TVA with physical attacks or threats of such attacks. Events such as war, armed conflicts, terrorist attacks, or similar disruptive events, may increase the risks of these attacks targeting critical infrastructure in the U.S.

Although TVA's operations are protected by automated monitoring systems, designated TVA business units (TVA Police and Emergency Management), TVA employees, local law enforcement, or a combination thereof, it may not be possible to effectively deter or prevent such attacks. These attacks could pose health and safety risks, significantly disable or destroy TVA assets, interfere with TVA's operations, result in additional regulatory or security requirements, increase the costs of nuclear licensing or compliance, and otherwise negatively affect TVA's cash flows, results of operations, and financial condition. In addition, following a physical attack or threat, TVA may incur increased costs for additional security measures, including additional physical plant security and security personnel, increased capability, or other necessary measures.

TVA's assets or their supporting infrastructure may not operate as planned.

Many of TVA's assets, including generation, transmission, navigation, and flood control assets, have been operating for several decades and have been in nearly constant service since they were completed. As such, they require regular maintenance, repair, and replacement in order to continue uninterrupted operation. Additionally, certain of TVA's newer assets utilize advanced technology that could experience technical or operating issues. The failure of TVA's assets or supporting infrastructure, including information technology systems, to perform as planned may cause health, safety, or environmental problems and may even result in events such as the failure of a dam, the inability to maintain a reservoir at the normal or expected level, or an incident at a coal-fired, gas-fired, or nuclear plant or a CCR facility. If these assets or their supporting infrastructure were to fail to operate as planned, if necessary repairs or upgrades were delayed or could not be completed as quickly as anticipated, or if necessary spare parts were unavailable, TVA, among other things:

•May have to invest a significant amount of resources to repair or replace the assets or the supporting infrastructure;

•May have to remediate collateral damage caused by a failure of the assets or the supporting infrastructure;

•May not be able to maintain the integrity or reliability of the transmission system at normal levels;

•May have to operate less economical sources of power;

•May have to purchase replacement power on the open market at prices greater than its generation costs;

•May be required to invest substantially to meet more stringent reliability standards;

•May be unable to maintain insurance on affected facilities, may be required to pay higher premiums for coverage, or may have to make certain repairs or upgrades to maintain insurance or to avoid higher premiums;

•May be unable to operate the assets for a significant period of time; and/or

•May not be able to meet its contractual obligations to deliver power.

Any of these potential outcomes may negatively affect TVA's cash flows, results of operations, financial condition, and reputation.

Table of Contents

TVA's operations present significant safety risks that are not able to be completely eliminated.

TVA's safety program, no matter how well designed and operated, may not completely prevent accidents. In addition to the potential human cost of accidents, which could include injury to employees or members of the public, significant accidents could impact TVA's ability to carry out operations, cause it to shut down facilities, subject it to additional regulatory scrutiny, expose it to litigation, damage its reputation, interfere with its ability to attract or retain a skilled workforce, or harm its financial condition.

TVA's service reliability could be affected by problems at other utilities or at TVA facilities, or by the increase in intermittent sources of power.

TVA's transmission facilities are directly interconnected with the transmission facilities of neighboring utilities and are thus part of the larger interstate power transmission grid. Certain of TVA's generation and transmission assets are critical to maintaining reliability of the transmission system. Additionally, TVA uses certain assets that belong to third parties to transmit power and maintain reliability. Accordingly, problems at other utilities as well as at TVA's facilities, including disruptions or black-outs caused by an event such as a severe storm, generator or transmission facility outage on a neighboring system, or the actions of a neighboring utility, may cause interruptions in TVA's service to its customers, increase congestion on the transmission grid, or reduce service reliability. The increasing contribution of intermittent sources of power, such as wind and solar, as well as the retirement of coal-fired plants, may place additional strain on TVA's system, and additional transmission upgrades may be required to maintain reliability. Upgrades may include enhancements to existing lines and substations or new installations as necessary to provide adequate power transmission capacity, maintain voltage support, and ensure generating plant and transmission system stability.

TVA's supplies of fuel, purchased power, or other critical items may be disrupted or obtained at a higher cost than planned.

TVA purchases coal, uranium, natural gas, fuel oil, and electricity from a number of suppliers. TVA contracts for conversion of uranium into nuclear fuel and purchases other items, such as anhydrous ammonia, liquid oxygen, or replacement parts that are critical to the operation of certain generation assets. TVA also purchases power from other power producers when the purchase of such power is appropriate due to economic opportunities or operational concerns. TVA's reliance on purchased power may increase if the demand for power suddenly increases in TVA's service territory, and purchased power may become more costly, or perhaps be unavailable, if the demand for power also increases in surrounding service territories. Examples of circumstances that may disrupt, or materially increase the cost of, the future delivery of fuel, purchased power, contracted services, or other critical supplies include but are not limited to cyber attacks; war or physical attacks, including the wars in Ukraine and Israel; political developments, international trade restrictions or tariffs, or legal actions; mine closures or reduced mine production; increase in demand for power by other power systems which reduces the amount of power that is available for purchase by TVA; increases in fuel exports; environmental regulations affecting TVA's suppliers; or transportation or delivery constraints, including the failure of suppliers to timely deliver the services or supplies to TVA at budgeted costs due to force majeure events, shortages of raw materials, supply chain difficulties, increased cost of components and labor, strikes or work stoppages, inflation, availability of personnel being impacted by regional health emergencies, or similar events.

If one of TVA's suppliers were to fail to perform under the terms of its contract with TVA, TVA might have to purchase replacement fuel, power, or other critical supplies, perhaps at a significantly higher price than TVA is entitled to pay under the contract. In some circumstances, TVA may not be able to recover this difference from the supplier. In addition, any disruption of TVA's supplies could require TVA to operate higher cost generation assets, thereby negatively affecting TVA's cash flows, results of operations, and financial condition. Moreover, if TVA were unable to acquire enough replacement fuel, power, or supplies, or were to have insufficient reserves to offset the loss, TVA may not be able to operate certain assets in the manner TVA determines is in its best interests or provide enough power to meet demand. As a result, power curtailments, brownouts, or even blackouts could occur.

FINANCIAL, ECONOMIC, AND MARKET RISKS

TVA could have to make significant future contributions to fund its qualified pension plan, and the increasing costs of the plan and employee benefits could adversely affect TVA's results of operations, financial condition, or cash flows.

On September 30, 2023, TVA's qualified pension plan had assets of approximately $8.1 billion compared to liabilities of approximately $10.1 billion. The plan is mature with approximately 22,000 retirees and beneficiaries receiving benefits of approximately $750 million per year. The costs of providing benefits depend upon a number of factors, including, but not limited to, provisions of the plan; changing experience and assumptions related to terminations, retirements, and mortality; rates of increase in compensation levels; rates of return on plan assets; discount rates used in determining future benefit obligations and required funding levels; optional forms of benefit payments selected; future government regulation; and levels of contributions made to the plan.

The pension plan covers substantially all of TVA's full-time annual employees hired prior to July 1, 2014. Although the

Table of Contents

plan has been frozen to new participants since July 1, 2014, TVA's payment obligation under the pension plan is substantial, and changes in any one or more of these factors could cause TVA's benefit expenditures under the plan to increase and significantly exceed TVA's planned contributions. Unfavorable financial market conditions, including those arising from inflation and changes in interest rates, may cause lower-than expected rates of return on plan assets, loss in value of the investments, and lower discount rates used in determining future benefit obligations. These changes would negatively impact the funded status of the plan and may require TVA to make contributions in excess of the amounts planned. In addition to the costs of the plan, the costs of providing health care benefits to TVA's employees and retirees have increased in recent years. Additional contributions to the plan and absorption of additional costs for the pension plan, health care plans, and other employee benefits would negatively affect TVA's cash flows, results of operations, and financial condition.

TVA’s reliance on debt markets may make TVA more vulnerable to being unable to meet cash requirements than private utilities that can issue equity securities.

TVA uses cash provided by operations together with proceeds from power system financings to fund its current cash requirements. TVA's power system financings consist primarily of the sale of Bonds and secondarily of alternative forms of financing, such as lease arrangements. It is critical that TVA continue to have access to the debt markets in order to meet its cash requirements. The importance of having access to the debt markets is enhanced by the fact that TVA, unlike most utilities, relies almost entirely on debt capital, since as a governmental instrumentality, TVA cannot issue equity securities. TVA’s access to the debt markets could be negatively impacted by market disruptions, including disruptions that result from systemic risks to the banking system and the financial markets. Moreover, rapid increases in interest rates beyond planning levels, especially as financing needs are increasing, or disruptions in the market due to rapid changes in interest rates, could impact TVA's cost of funds or ability to raise funds to meet cash needs.

TVA's debt ceiling may limit TVA's ability to carry out its business in the event that TVA were to approach or reach it.

Approaching or reaching the debt ceiling may negatively affect TVA's business by limiting TVA's ability to access capital markets and by increasing the amount of debt TVA must service without new debt capital. This occurrence may restrict TVA's ability to raise debt capital to acquire new power program assets or maintain existing ones, to carry out upgrades or improvements to existing assets or build new ones, to purchase power under long-term PPAs, or to meet regulatory requirements. In addition, approaching or reaching the debt ceiling may lead to increased legislative or regulatory oversight of TVA's activities and could lead to negative rating actions by credit rating agencies. Operating at higher balances of Bonds subject to the $30.0 billion debt limit reduces TVA's financial flexibility for using financing to handle emergencies or other rapid cash funding needs, and increases operational risks in management of the portfolio of Bonds subject to the debt limit.

TVA, together with owners of TVA securities, may be impacted by downgrades of TVA's credit ratings.

TVA’s current credit ratings are not based solely on its underlying business or financial condition but are based to a large extent on TVA's status as a wholly-owned government corporation and the legislation that defines TVA’s business structure. Key characteristics of TVA’s business defined by legislation include (1) the TVA Board's ratemaking authority; (2) the current competitive environment, which is defined by the fence and the anti-cherrypicking provision; and (3) TVA’s status as a corporate agency and instrumentality of the United States. If Congress takes any action that effectively alters any of these characteristics, TVA's credit ratings could be downgraded. Although TVA Bonds are not obligations of the United States, TVA, as a corporate agency and instrumentality of the United States, may be impacted by a downgrade of the United States’ sovereign credit ratings. Such a downgrade has and could again in the future, among other things, lead to a downgrade of TVA’s credit rating. Additionally, future events that may negatively impact TVA’s financial condition or reputation, including those discussed elsewhere in these Risk Factors, may lead to downgrades of TVA’s credit ratings, and the criteria used by the credit rating agencies to assign ratings could be changed at any time, which could result in changes to TVA’s ratings. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Liquidity and Capital Resources — Sources of Liquidity— Debt Securities for a discussion of a recent downgrade of TVA's credit rating by Fitch Ratings.

Downgrades of TVA’s credit ratings, particularly downgrades related to TVA-specific factors, may have material adverse effects on TVA’s cash flows, results of operations, and financial condition, as well as on investors in TVA securities. Among other things, a downgrade could increase TVA’s interest expense by increasing the interest rates that TVA pays on new debt securities that it issues. Such an increase may reduce the amount of cash available for other purposes, which may require TVA to borrow more, to reduce other expenses or capital investments, or to increase power rates. A downgrade may also result in TVA’s having to post collateral under certain physical and financial contracts that contain ratings triggers. A downgrade below a contractual threshold may specifically prevent TVA from borrowing under four credit facilities totaling $2.7 billion or posting letters of credit as collateral under these facilities. As of September 30, 2023, there were $535 million of letters of credit outstanding under these facilities. If TVA were no longer able to post letters of credit as collateral, TVA would likely have to post cash as collateral, which would negatively affect TVA’s liquidity.

Table of Contents

Further, a downgrade may lower the price of TVA securities in the secondary market, thereby negatively impacting investors who sell TVA securities after the downgrade and diminishing the attractiveness and marketability of TVA securities in the secondary market as well as new TVA debt securities.

TVA relies on certain assumptions about the future that may turn out to be inaccurate.

TVA uses certain assumptions that are presently justifiable in order to develop its plans for the future. Such assumptions include economic forecasts, anticipated energy and commodity prices, cost estimates, construction schedules, power demand forecasts, the appropriate generation mix to meet demand, and potential regulatory environments. Should these assumptions be inaccurate, or be superseded by subsequent events, TVA's plans may not be effective in achieving the intended results. This situation could negatively affect cash flows, results of operations, and financial condition, as well as TVA's ability to meet electricity demand and the way TVA conducts its business.

Demand for electricity could significantly decline, change, or increase, and any of these scenarios could negatively affect TVA's cash flows, results of operations, and financial condition.

The fence limits the area in which TVA or LPCs that distribute TVA power may provide power. Accordingly, TVA is limited in its ability to replace or attract new customers to offset reduced demand for electricity among its existing customers. Some of the factors that could reduce, change, or increase the demand for electricity include, but are not limited to, the following:

Economic Downturns or Recessions. Uncertainty in the macroeconomic environment, including the effects of increased inflationary pressures and interest rates, potential economic downturns or recessions, geopolitical pressures, and pandemics and regional health emergencies, could have adverse effects on the U.S. and global economies that may indirectly impact TVA’s financial condition and results of operations due to the nature of TVA’s business.

•Renewed economic downturns or a recession in TVA’s service area or other parts of the United States could reduce overall demand for power and thus reduce TVA’s power sales and cash flows, especially if TVA’s industrial customers were to reduce their operations and thus their consumption of power.

•TVA could be further adversely affected by a downturn in the economy and financial markets, including differences in the recovery of specific economic sectors or regions of the Tennessee Valley and continued volatility in interest rates, commodity prices, investment performance, and foreign currency exchange rates.

•An extended slowdown in the recovery of the United States’ economic growth, changes in the demand for commodities, or material changes in governmental policy could result in lower economic growth and thus lower demand for electricity in TVA’s key markets.

•Contractual counterparties could be impaired in their ability to perform their obligations to TVA, or may choose to abandon contracts, which could result in more costly operation of TVA’s facilities.

Loss of Customers. TVA could lose customers if customers were to choose another utility to meet some or all of their power needs where available, pursue self-generation to meet some or all of their power needs, or move their operations outside of TVA's service territory. As of September 30, 2023, TVA had wholesale power contracts with 153 LPCs, and 89 LPCs had entered into Power Supply Flexibility Agreements with TVA that allow the LPCs to locally generate or purchase up to approximately five percent of their average total hourly energy sales over a certain time period in order to meet their individual customers' needs. Revised flexibility agreements were made available to LPCs in August 2023 which permit projects to be located anywhere in TVA's service area, either connected to the LPC distribution system or TVA's transmission system, and makes it easier for LPCs to partner in projects. A significant portion of TVA's total operating revenues is concentrated in a small number of these LPCs. The loss of customers could have a material adverse effect on TVA's cash flows, results of operations, or financial condition, and could result in higher rates, especially because of the difficulty in replacing customers because of the fence. A significant loss of customers could also impact investor confidence, resulting in TVA paying higher interest rates on its securities.

Change in Demand for Electricity Generated from Renewable Sources. TVA has been adapting its generation mix to account for the growing preference for electricity generated by renewable sources, such as solar or wind. Demand by customers for power that is largely or exclusively generated from renewable sources may currently or in the future exceed TVA's ability to produce such power or to maintain reliability consistent with customer expectations, and TVA might be compelled to change how it operates and may incur additional expense in meeting this demand.

Increased Utilization of DER. As the amount of DER grows on the TVA system, the need for TVA's traditional generation resources may be reduced, and the ability of the system to reliably and economically operate in conjunction with these DER may become more challenging. If TVA were unable to compensate for the resulting

Table of Contents

decrease in demand for TVA electricity, TVA's cash flows, results of operations, and financial condition could be negatively impacted, likely resulting in higher rates and changes to TVA's operations.

Increased Energy Efficiency and Conservation. Increasingly efficient use of energy as well as conservation efforts and DER may reduce the demand for power supplied by TVA. Reductions, if TVA is unable to compensate for them by reducing its cost of production of electricity or by increasing rates, could negatively affect TVA's cash flows, results of operations, and financial condition and could result in changes to TVA's operations, especially if the reductions occur during an economic downturn or a period of slow economic growth. In addition, higher rates may lead to further reduced demand through increased conservation efforts and DER.

Change in Demographic Conditions. Demographic conditions such as population changes, job and income growth, housing starts, new business formation, inflation, and the overall level of economic activity or development may affect customer growth, customer usage, and the overall demand for power. Increases in the demand for power may require TVA to build additional generation facilities and/or rely more heavily on purchased power, either of which could negatively affect TVA's cash flows, results of operations, and financial condition. A lack of growth, or decline, in the number of customers or in customer demand for power may cause TVA to fail to fully realize the anticipated benefits from significant investments and expenditures and could negatively impact TVA’s growth, business, financial condition, results of operations, cash flows, and prospects.

Changes in technology could affect relationships with customers, require TVA to change how it conducts its operations, or impact TVA's financial condition.

TVA's primary business is to sell power it produces, for the most part, from large facilities such as nuclear power plants, hydroelectric facilities, natural gas-fired facilities, and coal-fired units. TVA sells power to LPCs and directly served customers. Research and development activities are ongoing to improve existing and alternative technologies to produce or store electricity, including large-scale energy storage, gas or wind turbines, fuel cells, microturbines, solar cells, and distributed energy or storage resources. Advances in these or other alternative technologies could reduce the costs of such production methods to a level that will enable these technologies to compete effectively with traditional power plants such as those used by TVA. These technologies could be more appealing to customers and could lead them to pressure TVA to modify power contracts to allow customers to generate some of their own power requirements or purchase power from other suppliers. Other customers might also cease purchasing power from TVA altogether. To the extent that sales to such customers are reduced or eliminated, TVA's cash flows, results of operations, and financial condition could be negatively affected. TVA could also be required to modify how it operates its traditional plants or further modify its generation mix to reduce reliance on these facilities. Additionally, demand could change in terms of amount or timing as more devices and equipment become connected to the internet, allowing for real-time adjustments in consumption of power. Such increased control over power consumption could, among other things, affect how TVA operates its facilities or dispatches power, or require TVA to change its pricing structure or rates.

TVA could lose its competitive edge if it fails to keep up with changes in technology.

TVA’s competitive position could be impacted if TVA is unable to deploy new technology in a cost effective and competitive manner. This process of enhancing or replacing TVA’s technology infrastructure involves significant development and implementation costs to keep pace with changing technologies and customer demand. If TVA fails to successfully implement critical technology infrastructure, or if it does not provide the anticipated benefits or meet customer demands, such failure could negatively affect TVA’s business strategy as well as impact its results of operations, financial position, and cash flows. Additionally, TVA may fail to fully capitalize on new technology due to cybersecurity risk aversion or unique regulations applicable to TVA, leading to a loss in competitive edge or inability to efficiently solve future problems.

TVA is subject to a variety of market risks that may negatively affect TVA's cash flows, results of operations, and financial condition.

TVA is subject to a variety of market risks, including but not limited to the following:

Commodity Price Risk. TVA's rates may increase if prices of commodities critical to operations, including coal, uranium, natural gas, fuel oil, crude oil, construction materials, or emission allowances, were to increase. An increase in rates may reduce demand and negatively impact TVA's cash flows, results of operations, and financial condition.

Investment Price Risk. TVA is exposed to investment price risk in its NDT, Asset Retirement Trust ("ART"), pension plan, Supplemental Executive Retirement Plan ("SERP"), Deferred Compensation Plan ("DCP"), and Restoration Plan ("RP"). If the value of the investments held in the NDT or the pension fund were to either decrease or fail to increase in accordance with assumed rates of return, TVA may be required to make substantial contributions to these funds. In addition, although TVA is not required to make contributions to the ART, it may choose to do so,

Table of Contents

particularly if TVA's estimates of its non-nuclear asset retirement obligation liabilities were to increase. TVA may also choose to make contributions to the SERP, DCP, and RP from time to time.

Interest Rate Risk. Changes in interest rates may, variably, increase the amount of interest that TVA pays on new Bonds that it issues, decrease the return that TVA receives on short-term investments, decrease the value of the investments in the NDT, ART, pension fund, SERP, DCP, and RP, increase the amount of collateral that TVA is required to post in connection with certain of its derivative transactions, increase the losses on the mark-to-market valuation of certain derivative transactions into which TVA has entered, or some combination of these.

Counterparty Credit and Performance Risk. TVA is exposed to the risk that its counterparties will not be able to perform their contractual obligations. If TVA's counterparties were to fail to perform their obligations, TVA's cash flows, results of operations, and financial condition may be adversely affected. In addition, the failure of a counterparty to perform may make it difficult for TVA to perform its obligations, particularly if the counterparty were a supplier of electricity or fuel.

Currency Exchange Rate Risk. Over the next several years, TVA expects to spend a significant amount of capital on various projects. A portion of this amount may be spent on contracts that are denominated in one or more foreign currencies. TVA's two issues of Bonds denominated in British pounds sterling are hedged by currency swap agreements. The value of the U.S. dollar compared with other currencies has fluctuated widely in recent years, including as a result of changes in political and economic conditions. If not effectively managed, foreign currency exposure could negatively impact TVA's counterparty risk, cash flows, results of operations, and financial condition.

The market for TVA Bonds might be limited.

Although many TVA Bonds are listed on stock exchanges, there can be no assurances that any market will develop or continue to exist for any Bonds. Additionally, no assurances can be made as to the ability of the holders to sell their Bonds or as to the price at which holders will be able to sell their Bonds. Future trading prices of Bonds will depend on many factors, including prevailing interest rates, the then-current ratings assigned to the Bonds, the amount of Bonds outstanding, the time remaining until the maturity of the Bonds, the redemption features of the Bonds, the market for similar securities, and the level, direction, and volatility of interest rates generally, as well as the liquidity of the markets for those securities.

When a particular series of Bonds is offered through underwriters, those underwriters may attempt to make a market in the Bonds. Dealers other than underwriters may also make a market in TVA Bonds. However, the underwriters and dealers are not obligated to make a market in any TVA Bonds and may terminate any market-making activities at any time without notice.

Further, certain investors and underwriters use the environmental impact or sustainability of a company or industry as a criterion for deciding whether to invest in that company or industry. TVA's use of fossil fuels, among other things, could lead such investors or underwriters to not purchase TVA Bonds or reduce the attractiveness of TVA Bonds as compared to other investments, thereby limiting the market for TVA Bonds. Moreover, some investors may no longer be able to hold TVA securities after specified dates if TVA's performance on certain metrics fails to meet investor requirements on metrics such as the carbon intensity, carbon emissions, or operation of thermal coal-fired or natural gas-fired assets.

In addition, legal limitations may affect the ability of banks and others to invest in Bonds. For example, national banks may purchase TVA Bonds for their own accounts in an amount not to exceed 10 percent of unimpaired capital and surplus. Also, TVA Bonds are "obligations of a corporation which is an instrumentality of the United States" within the meaning of Section 7701(a)(19)(C)(ii) of the Internal Revenue Code for purposes of the 60 percent of assets limitation applicable to U.S. building and loan associations. These limitations on TVA Bond investors also may limit the market for TVA Bonds.

Payment of principal and interest on TVA securities is not guaranteed by the U.S government.

Although TVA is a corporate agency and instrumentality of the U.S. government, TVA securities are not backed by the full faith and credit of the U.S. Principal and interest on TVA securities are payable solely from TVA's net power proceeds. Net power proceeds are the remainder of TVA's gross power revenues after deducting the costs of operating, maintaining, and administering its power properties and payments to states and counties in lieu of taxes, but before deducting depreciation accruals or other charges representing the amortization of capital expenditures, plus the net proceeds from the sale or other disposition of any power facility or interest therein. If TVA were to experience extreme financial difficulty and were unable to make payments of principal or interest on its Bonds, the federal government would not be legally obligated to prevent TVA from defaulting on its obligations. An inability to pay some or all of the principal or interest owed on a TVA security would likely have a negative impact on the market for TVA Bonds generally and TVA's financial condition, reputation, and relationship with the investment community, and could result in cross-defaults in other financial arrangements.

Table of Contents

HUMAN CAPITAL AND MANAGEMENT RISKS

Failure to attract and retain an appropriately qualified, diverse, and inclusive workforce may negatively affect TVA's results of operations.

TVA's business depends on its ability to recruit and retain key executive officers as well as skilled professional and technical employees. Labor is subject to external factors that are beyond TVA's control, including the highly competitive market for skilled workers and leaders, inflation, regional health emergencies, and workforce participation rates. The inability to attract and retain an appropriately qualified, diverse, and inclusive workforce could adversely affect TVA's ability to, among other things, operate and maintain generation and transmission facilities, complete large construction projects, and successfully implement its continuous improvement initiatives. If Congress were to reduce the salary of TVA's CEO or otherwise amend TVA's compensation philosophy, TVA's ability to attract and retain key executives or other employees may be compromised.

Changes in the membership of the TVA Board and TVA senior management could impact how TVA operates.

The TVA Board is comprised of up to nine part-time members serving staggered, five-year terms. One to two Board members' terms typically expire each year. In addition, there is always the possibility that one or more members of TVA's senior management may retire or otherwise leave TVA. The individuals filling either the TVA Board or senior management positions may wish to change how TVA operates in whole or in part. If the changes were not successful or TVA were unable to adapt properly to such changes, TVA's financial condition, results of operations, reputation, and relationship with customers could be negatively affected.

Loss of a quorum of the TVA Board could limit TVA's ability to adapt to meet changing business conditions.

Under the TVA Act, a quorum of the TVA Board is five members. Becoming a member of the TVA Board requires confirmation by the U.S. Senate following appointment by the President. This process has been and could again in the future be subject to extended delays. The President may remove TVA Board members, and the TVA Board members may resign or otherwise leave office before a successor is commissioned. As a result, a delay in the appointment or confirmation of directors, or the removal of directors by the President, can threaten the TVA Board's quorum. The TVA Board is responsible for, among other things, establishing the rates TVA charges for power as well as TVA's long-term objectives, policies, and plans. Accordingly, the loss of a quorum for an extended period of time would impair TVA's ability to change rates and to modify these objectives, policies, and plans. Such an impairment would likely have a negative impact on TVA's ability to respond to significant changes in technology, the regulatory environment, or the industry overall and, in turn, negatively affect TVA's cash flows, results of operations, financial condition, and reputation. The TVA Board currently has nine members.

RISKS RELATED TO THE ENVIRONMENT AND CATASTROPHIC EVENTS

Weather conditions may hamper TVA's ability to supply power or negatively impact net revenue, and weather conditions may cause customers' demand for power to exceed TVA's then-present power supply capabilities.

Weather may have a material adverse effect on TVA’s cash flows, results of operations, and financial condition, including through the following non-exclusive foreseeable scenarios:

•Extreme temperatures may increase the demand for power and require TVA to purchase power at high prices to meet customer demand, whereas unusually mild weather may result in decreased demand for power and lead to reduced electricity sales.

•In periods of below-normal rainfall or drought, TVA's low-cost hydroelectric generation may be reduced, requiring TVA to purchase power or use more costly means of producing power.

•Periods of either high or low levels of rainfall may impede river traffic, impacting barge deliveries of critical items such as coal and equipment for power facilities.

•High river water temperatures in the summer may limit TVA's ability to use water from the Tennessee or Cumberland River systems for cooling at certain of TVA's generating facilities, thereby limiting its ability to operate these generating facilities. This situation would be aggravated during periods of reduced rainfall or drought.

•Changes in the climate may make, or may be making, such shifts in weather more common or extreme. Climate change may cause catastrophic events like droughts, floods, wildfires, heat waves, and snow or ice storms to occur more frequently in the Tennessee Valley region. In response, TVA may be required to, among other things, change its generation mix or change how it conducts its operations.

•Extreme weather conditions or damage resulting from storms or other catastrophic events could stress TVA's transmission and distribution systems, communication systems, and technology, including information technology, resulting in increased restoration, maintenance, and capital costs and reduced reliability.

Events that affect the supply or quality of water from the Tennessee River system and Cumberland River system, or

Table of Contents

elsewhere, may interfere with TVA's ability to generate power.

An inadequate supply of water in the Tennessee River system and Cumberland River system could negatively impact TVA's cash flows, results of operations, and financial condition, including potentially reducing generation at TVA's hydroelectric plants, which may require TVA to increase reliance on more expensive generation sources or purchase more energy in the market likely at higher costs; negatively affecting generation at coal-fired and nuclear plants, which depend on water from the river systems near which they are located for cooling and for use in boilers where water is converted into steam to drive turbines; or negatively affecting generation at TVA's gas-fired facilities not located near a river, which nonetheless require alternative sources of water, such as from wells or local utility companies.

Further, the water for these purposes must be of a particular quality for use in TVA's equipment. When the available water is not of sufficient quality for TVA's use, TVA must either treat the water or obtain alternate sources. An inadequate supply of quality water could result, among other things, from periods of low rainfall or drought, the withdrawal of water from the river systems by governmental entities or others, incidents affecting bodies of water not managed by TVA, supply issues that affect water providers, or intrusive aquatic plants and animals such as eel grass, algae, and mussels that block cooling water intake pipes or otherwise interfere with the operation of TVA's generation facilities. While TVA manages the Tennessee River and a large portion of its tributary system to provide much of the water necessary for the operation of its power plants, the USACE operates and manages other bodies of water upon which some of TVA's facilities rely. Events at these bodies of water or their associated hydroelectric facilities may interfere with the flow of water and may result in TVA's having insufficient water quality to meet the needs of some of its generating plants. If TVA were to have insufficient water supply of the quality necessary to meet the needs of its plants, TVA may be required to reduce generation at its affected facilities to levels compatible with the available supply of quality water, or take additional steps that change how TVA conducts its operations or that otherwise cause TVA to incur additional expense.

Catastrophic events may negatively affect TVA's cash flows, results of operations, and financial condition.

TVA's cash flows, results of operations, and financial condition may be adversely affected, either directly or indirectly, by catastrophic events such as fires, earthquakes, explosions, solar events, electromagnetic pulses, geomagnetic disturbances, droughts, floods, hurricanes, tornadoes, polar vortexes, icing events, pipeline explosions, or other casualty events, wars, national emergencies, terrorist activities, pandemics or epidemics, widespread public health crises, geopolitical conflicts, or other similar destructive or disruptive events. These events, the frequency and severity of which are unpredictable, may, among other things, limit or disrupt TVA's ability to generate and transmit power; lead to legislative or regulatory changes that affect the construction, operation, and decommissioning of nuclear units and the storage of spent fuel; limit or disrupt TVA's ability to provide flood control and river management; reduce the demand for power; disrupt fuel or other supplies; require TVA to produce additional tritium; cause or exacerbate an economic downturn; require TVA to make substantial capital investments for repairs, improvements, or modifications; negatively affect the cost or availability of insurance; or cause or exacerbate instability in the financial markets.

These destructive or disruptive events may present special risks to TVA’s nuclear plants. If public opposition to nuclear power were to make operating nuclear plants less feasible as a result of any of these events, TVA may be forced to shut down its nuclear plants. This would make it substantially more difficult for TVA to obtain greater amounts of its power supply from low or zero carbon emitting resources and to replace its generation capacity when faced with retiring or idling certain coal-fired units. Additionally, some studies have predicted that climate change may cause catastrophic events, such as heat waves, droughts, and floods, to occur more frequently or with greater intensity in the Tennessee Valley region, which could adversely impact TVA.

ACCOUNTING AND FINANCIAL REPORTING RISKS

TVA's financial control system cannot guarantee that all control issues and instances of fraud or errors will be prevented or detected.

No financial control system, no matter how well designed and operated, can provide absolute assurance that the objectives of the control system will be met, and no evaluation of financial controls can provide absolute assurance that all control issues and instances of fraud or errors can or will be prevented or detected. The design of any system of financial controls is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions, regardless of how remote.

TVA may be unable to use regulatory accounting for some or all costs.

TVA uses regulatory accounting to defer certain costs. To qualify for regulatory accounting, costs must meet certain accounting criteria and be approved for regulatory accounting treatment by the TVA Board in its capacity as TVA's regulator. When costs do not meet, or cease to meet, these criteria, or if the TVA Board were to disallow the treatment or were to cease to be TVA's sole regulator in such areas, TVA may not be able to defer those costs. Such an inability to defer costs would likely have a substantial impact on TVA's financial condition and results of operations and could impact the timing and amounts of TVA's rate recovery. For a discussion of regulatory accounting, see Part II, Item 7,

Table of Contents

Management's Discussion and Analysis of Financial Condition and Results of Operations — Critical Accounting Estimates.

GENERAL RISK FACTORS

TVA may not be able to implement its business strategy successfully.

TVA's financial condition and results of operations are largely dependent on the extent to which it can implement its business strategy successfully. TVA's strategy includes maintaining low rates, aligning operations and maintenance costs with revenues, being responsible stewards, living within its means, meeting reliability expectations, and providing a balanced portfolio, in light of TVA's strategic priorities. The strategic priorities are Powerful Partnerships, People Advantage, Operational Excellence, Igniting Innovation, and Financial Strength. This strategy is subject to business, economic, and competitive uncertainties and contingencies, many of which are beyond TVA’s control. Such uncertainties include customer energy-efficiency programs that are designed to reduce energy demand; energy-efficiency efforts by customers not related to TVA’s energy-efficiency programs; increased customer use of DER, such as solar panels and other technologies, as well as the use of energy storage technologies; and macroeconomic factors impacting economic growth or contraction within TVA’s service territory, which could affect energy demand. If TVA is unable to successfully implement its business strategy, TVA’s financial condition and results of operations could be negatively affected. See Item 1, Business — Environmental Matters and Human Capital Management, Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges, and Part III, Item 11, Executive Compensation — Compensation Discussion and Analysis for additional information regarding TVA's strategic objectives.

TVA's cost reduction efforts may not be successful.

TVA is undertaking a cost optimization project to partially offset cost increases expected for the years 2024 through 2026, and achieving this may prove challenging, particularly if inflation rates remain high. The failure to achieve or maintain cost reduction targets could adversely affect TVA's rates, reputation, cash flows, results of operations, and financial condition. Moreover, if TVA fails to limit rate increases as provided in the long-term Partnership Agreements, participating LPCs can terminate the Partnership Agreements.

TVA's organizational structure may not adequately support TVA's anticipated business needs or enable it to meet the needs of its current or potential customers.

TVA has been modifying its organizational structure to better adapt to the forecasted economic environment. If TVA's assumptions about either its forecasts or the proper internal structure of the company to meet the expected environment are inaccurate or if this structure does not adequately support TVA's needs, TVA could face operational or financial challenges that could adversely affect its cash flows, results of operations, and financial condition as well as TVA's ability to attract or retain a skilled workforce and to meet the needs of its current or potential customers.

TVA may have difficulty adapting its business model to changes in the utility industry and customer preferences.

The traditional business model for power production, selling power from centrally located plants, is facing pressure from a variety of sources, including the potential for self-generation by current or potential customers, new technologies such as energy storage, and increased energy efficiency. These pressures may reduce the demand for TVA power. If TVA does not or cannot adapt to this pressure by adequately changing its business model, TVA's financial condition and results of operations could be negatively affected.

TVA's reputation may be negatively impacted.

As with any company, TVA's reputation is a vital element of its ability to effectively conduct its business. TVA's reputation could be harmed by a variety of factors, including failure of a generating asset or supporting infrastructure; failure to effectively manage land and other natural resources entrusted to TVA; real or perceived violations of environmental regulations, including those related to climate change; real or perceived issues with TVA's safety culture or work environment; inability to meet its human capital management goals; inability to meet its carbon reduction aspirations; inability to keep its electricity rates stable; involvement in a class-action or other high-profile lawsuit; significant delays in construction projects; occurrence of or responses to cyber attacks or security vulnerabilities; acts or omissions of TVA management or acts or omissions of a contractor or other third-party working with or for TVA, which actually or perceivably reflect negatively on TVA; measures taken to offset reductions in demand or to supply rising demand; or a significant dispute with one of TVA's customers.

Any deterioration in TVA's reputation may harm TVA's relationships with its customers and stakeholders, may increase its cost of doing business, may interfere with its ability to attract and retain a qualified, inclusive, and diverse workforce, may impact TVA's ability to raise debt capital, and may potentially lead to the enactment of new laws and regulations, or the modification of existing laws and regulations, that negatively affect the way TVA conducts its business.

Table of Contents

ITEM 1B. UNRESOLVED STAFF COMMENTS

Not applicable.

ITEM 1C. CYBERSECURITY

Not applicable.

ITEM 2. PROPERTIES

TVA holds personal property in its own name but holds real property as agent for the U.S. TVA may acquire real property as an agent of the U.S. by negotiated purchase or by eminent domain.

Generating Properties

At September 30, 2023, TVA-operated generating assets consisted of seven nuclear units, 24 active coal-fired units, 89 simple-cycle units (84 active units and five idled units), one cogeneration unit, 14 combined-cycle power blocks, 109 conventional hydroelectric units (106 active units and three units in long-term outage and unavailable for service), four pumped-storage hydroelectric units, five diesel generator units, and nine operating solar installations. As of September 30, 2023, four of the combined-cycle power blocks were leased to special purpose entities ("SPEs") and leased back to TVA under long-term leases. See Note 11 — Variable Interest Entities and Note 14 — Debt and Other Obligations — Lease/Leasebacks. In addition, TVA is leasing the three Caledonia combined-cycle power blocks under a long-term lease. For a discussion of these assets, see Item 1, Business — Power Supply and Load Management Resources.

Net Capability

Net capability is defined as the ability of an electric system, generating unit, or other system component to carry or generate power for a specified time period. It does not include real-time bulk electrical system operating constraints such as transmission line loading limitations, fuel availability such as coal, gas, and seasonal river reservoir levels, fuel blend, severe weather events, environmental and/or other regulatory constraints, transmission system outages, generator outages, or generator derates. Summer net capability as presented in the table below reflects the expected output of individual resources at TVA’s anticipated summer demand peak. The summation of those individual resources does not include the real-time bulk electrical system operating constraints previously noted. See also Item 1A, Risk Factors — Operational Risks and Risks Related to the Environment and Catastrophic Events.

In addition to the TVA-operated generating facilities presented in the table below, TVA also has 8,471 MWs of operating capacity available through PPAs. At September 30, 2023, these contracts were comprised of 3,061 MWs of renewable PPAs and 5,410 MWs of nonrenewable PPAs. The summation of TVA's PPAs under contract does not include real-time operating constraints, such as intermittency of renewable resources associated with weather or other factors. See Item 1, Business — Power Supply and Load Management Resources — Power Purchase and Other Agreements for information on TVA's renewable and nonrenewable power purchase contracts by resource type and location.

Table of Contents

The following table summarizes TVA's summer net capability in MW at September 30, 2023:


SUMMER NET CAPABILITY At September 30, 2023
Source of Capability	Location	Number of Units	Summer Net Capability (MW)	Date First Unit Placed in Service (CY)	Date Last Unit Placed in Service (CY)
TVA-Operated Generating Facilities
Nuclear
Browns Ferry	Alabama	3	3,662	1974	1977
Sequoyah	Tennessee	2	2,292	1981	1982
Watts Bar	Tennessee	2	2,278	1996	2016
Total Nuclear		7	8,232
Coal-Fired

Cumberland	Tennessee	2	2,470	1973	1973
Gallatin	Tennessee	4	976	1956	1959
Kingston	Tennessee	9	1,298	1954	1955

Shawnee	Kentucky	9	1,071	1953	1955
Total Coal-Fired		24	5,815
Natural Gas and/or Oil-Fired(1)(2)
Simple-Cycle Combustion Turbine
Allen(3)	Tennessee	20	287	1971	1972
Brownsville	Tennessee	4	438	1999	1999
Colbert	Alabama	11	1,041	1972	2023
Gallatin	Tennessee	8	580	1975	2000
Gleason	Tennessee	3	455	2000	2000
Johnsonville	Tennessee	19	1,028	1975	2000
Kemper	Mississippi	4	292	2002	2002
Lagoon Creek	Tennessee	12	884	2001	2002
Marshall County	Kentucky	8	592	2002	2002
Subtotal Simple-Cycle Combustion Turbine		89	5,597
Combined-Cycle Combustion Turbine
Ackerman(4)	Mississippi	1	713	2007	2007
Allen(5)	Tennessee	1	1,106	2018	2018
Caledonia(6)	Mississippi	3	819	2003	2003
John Sevier(7)	Tennessee	1	871	2012	2012
Lagoon Creek(8)	Tennessee	1	596	2010	2010
Magnolia	Mississippi	3	951	2003	2003
Paradise(9)	Kentucky	1	1,100	2017	2017
Southaven	Mississippi	3	802	2003	2003
Subtotal Combined-Cycle Combustion Turbine		14	6,958
Co-Generation
Johnsonville	Tennessee	1	83	1975	2000
Total Natural Gas and/or Oil-Fired		104	12,638
Hydroelectric
Conventional Plants	Alabama	36	1,159	1925	1962
	Georgia	2	37	1931	1956
	Kentucky	5	225	1944	1948
	North Carolina	6	473	1940	1956
	Tennessee(3)(10)	60	1,845	1912	1972
Pumped-Storage(11)	Tennessee	4	1,700	1978	1979
Total Hydroelectric		113	5,439
Diesel Generator
Meridian	Mississippi	5	9	1998	1998
TVA Non-hydro Renewable Resources(12)			1
TVA Other Nonrenewable Resources(12)			5
Total TVA-Operated Generating Facilities Summer Net Capability			32,139

Notes

(1) See Generating Properties above for a discussion of TVA-operated natural gas and/or oil-fired facilities subject to leaseback and long-term lease arrangements.

(2) As of September 30, 2023, 137 MW of peak firing short-term capability of simple-cycle combustion turbine units was not operational and would require additional

investment for dependable use; therefore, this short-term capability is not presented in the table above.

(3) As of September 30, 2023, TVA had five idled units at Allen Combustion Turbine Facility (Units 2, 3, 11, 17, and 18) and three units that were in long-term outage and unavailable for service at Wilbur Hydroelectric Facility (Units 1-3). These units are included in their respective locations in the table above; however, the capability from these units is excluded.

(4) Ackerman Combined Cycle Facility is a single steam cycle unit driven by two gas turbines (2x1 configuration).

Table of Contents

(5) Allen Combined Cycle Facility is a single steam cycle unit driven by two gas turbines (2x1 configuration).

(6) Caledonia Combined Cycle Plant ("Caledonia CC") is currently a leased facility operated by TVA.

(7) John Sevier Combined Cycle Facility ("John Sevier CCF") is a single steam cycle unit driven by three gas turbines (3x1 configuration).

(8) Lagoon Creek Combined Cycle Facility is a single steam cycle unit driven by two gas turbines (2x1 configuration).

(9) Paradise Combined Cycle Facility is a single steam cycle unit driven by three gas turbines (3x1 configuration).

(10) Includes 86 MW of summer net capability associated with Hiwassee Hydro Unit 2. See Item 1, Business — Power Supply and Load Management Resources — Renewable Energy Resources — Conventional Hydroelectric Dams.

(11) See Item 1, Business — Power Supply and Load Management Resources — Hydroelectric Pumped-Storage for a discussion of Raccoon Mountain Pumped-Storage Plant.

(12) TVA owns approximately one MW of renewable solar capability among nine operating solar installations, and Allen Combined Cycle Facility has five MW of nonrenewable biomass capability.

Transmission Properties

TVA's transmission system interconnects with systems of surrounding utilities and, at September 30, 2023, consisted primarily of approximately 2,500 circuit miles of 500 kilovolt, 11,900 circuit miles of 161 kilovolt, and 1,900 circuit miles of other voltage transmission lines; 5,113 miles of fiber optic lines; 573 transmission substations, power switchyards, and switching stations; and 1,355 customer connection points (customer, generation, and interconnection).

Natural Resource Stewardship Properties

TVA operates and maintains 49 dams and manages approximately 11,000 miles of reservoir shoreline, 293,000 acres of reservoir land, 650,000 surface acres of reservoir water, and approximately 100 public recreation areas throughout the Tennessee Valley, including campgrounds, day-use areas, and boat launching ramps.

Additionally, TVA manages over 150 agreements for commercial recreation (such as campgrounds and marinas). As part of its stewardship responsibilities, TVA approval is required to be obtained before any obstruction affecting navigation, flood control, or public lands can be constructed across, along, or in the Tennessee River and its tributaries. These public lands and waters managed by TVA provide both conservation and sustainable recreation.

Buildings

TVA has buildings and structures located throughout its service area to support TVA's mission of service. These buildings and structures include generation and transmission facilities, corporate offices, customer service centers, power service centers, warehouses, visitor centers, and crew quarters. Two significant buildings are its Knoxville Office Complex and the Chattanooga Office Complex ("COC") in Tennessee.

TVA engages in ongoing Tennessee Valley-wide real property portfolio evaluations of buildings, structures, and land as part of the strategic real estate program, which focuses on reducing cost, right-sizing the portfolio, and aligning real estate holdings with TVA's strategic direction. In addition, TVA continues to operate in a hybrid work environment for those who do not have to be physically present at a TVA facility. See Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges — Real Property Portfolio.

Disposal of Property

TVA has broad authority to dispose of personal property but only limited authority to dispose of real property. TVA's primary, but not exclusive, authority to dispose of real property is as follows: TVA has authority to dispose of surplus real property at a public auction; TVA may dispose of real property for certain specified purposes, including providing replacement lands for certain entities whose lands were flooded or destroyed by dam or reservoir construction, providing real property for recreational use, and granting easements and rights-of-way upon which are located transmission or distribution lines; TVA can dispose of real property in connection with the construction of generating plants or other facilities under certain circumstances; and TVA has authority to grant easements for rights-of-way and other purposes.

The Basic Tennessee Valley Authority Power Bond Resolution adopted by the TVA Board on October 6, 1960, as amended on September 28, 1976, October 17, 1989, and March 25, 1992 (the "Basic Resolution") prohibits TVA (1) from mortgaging any part of its power properties and (2) from disposing of all or any substantial portion of these properties unless TVA provides for a continuance of the interest, principal, and sinking fund payments due and to become due on all outstanding Bonds, or for the retirement of such Bonds.

Table of Contents

ITEM 3. LEGAL PROCEEDINGS

From time to time, TVA is party to or otherwise involved in lawsuits, claims, proceedings, investigations, and other legal matters ("Legal Proceedings") that have arisen in the ordinary course of conducting its activities, as a result of catastrophic events or otherwise. While the outcome of the Legal Proceedings to which TVA is a party cannot be predicted with certainty, any adverse outcome to a Legal Proceeding involving TVA may have a material adverse effect on TVA's financial condition, results of operations, and cash flows.

For a discussion of Legal Proceedings involving TVA, see Note 22 — Commitments and Contingencies — Legal Proceedings, which discussion is incorporated by reference into this Item 3.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

Table of Contents

PART II

ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Not applicable.

ITEM 6. RESERVED

Not applicable.

ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

(Dollars in millions except where noted)

The following Management's Discussion and Analysis of Financial Condition and Results of Operations ("MD&A") is intended to help the reader understand the Tennessee Valley Authority ("TVA"), its financial condition, results of operations, and cash flows, and its present business environment. The MD&A is provided as a supplement to, and should be read in conjunction with, TVA's consolidated financial statements and the accompanying notes thereto contained in Item 8, Financial Statements and Supplementary Data of this Annual Report on Form 10-K for the fiscal year ended September 30, 2023 (the "Annual Report"). See Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations in TVA's Annual Report on Form 10-K for the year ended September 30, 2022, filed with the Securities and Exchange Commission ("SEC") on November 15, 2022, for a discussion of variance drivers for the year ended September 30, 2022, as compared to the year ended September 30, 2021. The MD&A includes the following sections:

•Business and Mission — a general description of TVA's business, objectives, strategic priorities, and core capabilities;

•Executive Overview — a general overview of TVA's activities and results of operations for 2023;

•Results of Operations — an analysis of TVA's consolidated results of operations for 2022 and 2023;

•Liquidity and Capital Resources — an analysis of cash flows, a description of aggregate contractual obligations, and an overview of financial position;

•Key Initiatives and Challenges — an overview of current and future initiatives and challenges facing TVA;

•Critical Accounting Estimates — a summary of significant estimates, judgments, and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes;

•Legislative and Regulatory Matters — a summary of laws and regulations that may impact TVA; and

•Risk Management Activities — a description of TVA's risk governance and exposure to various market risks.

Business and Mission

Business

TVA operates the nation's largest public power system. At September 30, 2023, TVA had 60 directly served customers, which include seven federal agency customers, and 153 local power company customers ("LPCs") that serve approximately 10 million people in parts of seven southeastern states. TVA generates nearly all of its revenues from the sale of electricity, and in 2023 revenues from the sale of electricity totaled $11.9 billion. As a wholly-owned agency and instrumentality of the United States ("U.S."), however, TVA differs from other electric utilities in a number of ways:

•TVA is a government corporation.

•The area in which TVA sells power is limited by the Tennessee Valley Authority Act of 1933, as amended, (the "TVA Act"), under a provision known as the "fence"; however, another provision of federal law known as the Anti-Cherrypicking Amendment ("ACPA") generally protects TVA from being forced to provide access to its transmission lines to others for the purpose of delivering power to customers within substantially all of TVA's defined service area.

•The rates TVA charges for power are set solely by the TVA Board of Directors ("TVA Board") and are not set or reviewed by another entity, such as a public utility commission. In setting rates, however, the TVA Board is charged by the TVA Act to have due regard for the primary objectives of the TVA Act, including the objective that power be sold at rates as low as feasible.

Table of Contents

•TVA is not authorized to raise capital by issuing equity securities. TVA relies primarily on cash from operations and proceeds from power program borrowings to fund its operations and is authorized by the TVA Act to issue bonds, notes, or other evidences of indebtedness (collectively, "Bonds") in an amount not to exceed $30.0 billion outstanding at any given time. Although TVA's operations were originally funded primarily with appropriations from Congress, TVA has not received any appropriations from Congress for any activities since 1999 and, as directed by Congress, has funded essential stewardship activities primarily with power revenues.

TVA's Mission of Service


ENERGY			ENVIRONMENT			ECONOMIC DEVELOPMENT

•Energy — Delivering reliable, low cost, clean energy;

•Environment — Caring for the region's natural resources; and

•Economic Development — Creating sustainable economic growth.

Table of Contents

While TVA's mission has not changed since it was established in 1933, the climate in which TVA operates continues to evolve. The business and economic environment has become more challenging due to economic conditions; tougher environmental standards; and the need to diversify its power supply and adapt to changing customer usage behaviors, new technologies, and emerging, non-traditional competition. To continue to deliver its mission of service while evolving for future success, TVA must realize five strategic priorities, which are comprised of several strategic elements each:

Accelerate the impact of inclusion with diversity within TVA and the communities TVA serves

Nation’s top nuclear fleet by 2025

Maintain financial health while funding TVA's energy transition

Enhance TVA's role as a community leader and trusted partner

Advance energy transformation in the Tennessee Valley through innovation

Deliver an enterprise talent strategy that will bring TVA's business priorities to life

Evolve TVA's reliable and clean energy supply into the energy system of the future

Balance commitments and obligations

Engage and attract economic development opportunities and support the Tennessee Valley's energy transition

Establish a focused innovation framework and mindset

Cultivate a positive employee experience to heighten workforce engagement and performance as TVA works everywhere to serve

Lead the industry in reliable, resilient, cost-effective carbon reduction

Develop long-term business model

Champion the unique value of the Tennessee Valley public power model

Advance TVA's grid capabilities to meet the reliability, resiliency, and flexibility needs of the future

Meet resource and environmental stewardship commitments

TVA's mission sets the stage for its strategic planning process that includes strategic objectives, initiatives, and scorecards for performance designed to provide clear direction for improving TVA's core business.

Linking the Mission to Performance

TVA has formulated key performance measures to support its strategic priorities. The intent of these measures is to align employees to TVA's mission by focusing its collective efforts on operational excellence, fiscal responsibility, economic development, and environmental stewardship. The measures are designed to promote teamwork, encourage high performance behaviors, and motivate TVA employees to achieve goals aligned with TVA's mission and values. The 2023 corporate results compared with targets for these key measures are reflected in the chart below. TVA has not yet established performance measures for 2024. See Part III, Item 11, Executive Compensation — Compensation Discussion and Analysis for information regarding how the measures are calculated.


2023 Corporate Measure	Weight	Actual			Threshold			Target			Stretch
TVA total spending ($ millions)	40%	$	6,168		$	6,757		$	6,560		$	6,362
Load not served (system minutes)	30%	3.1			4.5			3.9			3.2
Annualized nuclear online reliability loss factor (%)	15%	1.53		%	3.14		%	2.00		%	1.26		%
Combined cycle equivalent availability factor (%)	10%	83.9		%	78.6		%	83.6		%	89.0		%
Coal equivalent availability factor (%)	5%	74.8		%	58.8		%	63.8		%	73.3		%

Table of Contents

Executive Overview

TVA's operating revenues were $12.1 billion and $12.5 billion for the years ended September 30, 2023 and 2022, respectively. Operating revenues decreased for the year ended September 30, 2023 as compared to the prior year, primarily as a result of lower sales volume and lower fuel rates. The decreased sales volume was driven by overall milder weather during 2023. Although TVA sustained several days of single-digit temperatures and experienced record-setting demand as a result of Winter Storm Elliott in late December 2022, these impacts were more than offset by TVA experiencing milder weather during the remainder of 2023. The lower fuel rates were primarily due to lower natural gas prices.

Total operating expenses increased $231 million for the year ended September 30, 2023 as compared to the prior year. Operating and maintenance expense increased $386 million for the year ended September 30, 2023, primarily due to increases in payroll and benefit costs, expenditures related to TVA's New Nuclear Program, outage and contract labor expense, and post-employment benefit expense. Depreciation and amortization expense increased $159 million as compared to the prior year primarily driven by an increase in depreciation expense associated with the retirements of Cumberland and Bull Run and an increase in amortization expense of decommissioning costs. These increases were partially offset by a $288 million decrease in purchased power expense primarily due to lower demand for energy due to overall milder weather and higher availability of nuclear generation.

In the second quarter of 2023, TVA documented its final decision to retire the two coal-fired units at Cumberland Fossil Plant ("Cumberland"). TVA is working on the replacement generation for the first unit at Cumberland with a 1,450 megawatts ("MW") combined cycle plant that is expected to be operational by the end of CY 2026. The second unit is scheduled to be retired by the end of CY 2028, and in May 2023, TVA published the notice of intent to conduct an environmental impact statement ("EIS") to study potential environmental impacts associated with the proposed construction and operation of facilities to replace part of that generation. Pre-commercial plant operations began on Colbert Combustion Turbine Units 9-10 in June 2023 and on Colbert Combustion Turbine Unit 11 in early July 2023, and all units became operational on July 25, 2023. In addition, pre-commercial plant operations began on Paradise Combustion Turbine Units 5-7 in the first quarter of 2024. See Key Initiatives and Challenges — Optimum Energy Portfolio — Coal-Fired Fleet and Natural Gas-Fired Units below.

Winter Storm Elliott brought historic winter storm conditions across the majority of the United States, including the TVA service area. Rain followed by extreme cold weather and wind also created operational challenges, including the failure of several generating facilities to operate as planned and challenges in purchasing and importing generation from neighboring markets. TVA implemented emergency operation plans previously established with its LPCs and direct serve customers, including load reduction directives to LPCs which resulted in rolling outages, to ensure the overall stability of the power grid. TVA has conducted a review of the actions taken both before and during the event to prepare for future needs and challenges. See Key Initiatives and Challenges — Operational Challenges — Winter Storm Elliott.

TVA's economic development efforts, reliability, and competitive rates continued to help attract or expand businesses and industries in the Tennessee Valley. These companies announced projected capital investments of $9.2 billion and are expected to create 12,276 jobs and retain 46,135 jobs. These amounts are forward-looking and are subject to various uncertainties. Amounts may differ materially based upon a number of factors, including, but not limited to, economic downturns or recessions. See Forward-Looking Information and Part I, Item 1A, Risk Factors for a discussion of additional factors, and see Part I, Item 1, Business — Economic Development Activities for definitions of "new jobs" and "retained jobs."

Table of Contents

Results of Operations

Sales of Electricity

Sales of electricity, which accounted for nearly all of TVA's operating revenues, were 157,311 million and 162,608 million kilowatt hours ("kWh") for 2023 and 2022, respectively. The total sales of electricity in 2023 includes 99 million kWh of pre-commercial generation at Colbert Combustion Turbine Units 9-11. TVA sells power at wholesale rates to LPCs that then resell the power to their customers at retail rates. TVA also sells power to directly served customers, consisting primarily of federal agencies and customers with large or nonstandard loads. In addition, power exceeding TVA's system needs is sold under exchange power arrangements with certain other power systems.

The following chart compares TVA's sales of electricity by customer type for the years ended September 30, 2023 and 2022:


			Sales of Electricity
For the years ended September 30
			(millions of kWh)

The following charts show a breakdown of TVA's energy load:

Note

Information included in the charts above was derived from energy usage of directly served customers and customers served by LPCs during calendar year ("CY") 2022, and these graphs will continue to be updated on a CY basis.

Table of Contents

Weather affects both the demand for TVA power and the price for that power. TVA uses degree days to measure the impact of weather on its power operations. Degree days measure the extent to which the TVA system 23-station average temperatures vary from 65 degrees Fahrenheit.


	Degree Days
	Variation from Normal								Change from Prior Period
	2023	Normal	Percent Variation		2022	Normal(1)	Percent Variation		Percent Change
Heating Degree Days	2,774	3,132	(11.4)	%	3,031	3,132	(3.2)	%	(8.5)	%

Cooling Degree Days	1,634	1,824	(10.4)	%	1,974	1,824	8.2	%	(17.2)	%

Note

(1) The prior period degree day information was adjusted in 2023 in order to incorporate a change in TVA's current calculation of normal weather. TVA now calculates based on a 20-year period of weather history (CYs 2001-2020), and this period will be updated every five years.

Sales of electricity decreased approximately three percent for the year ended September 30, 2023, as compared to the same period of the prior year. The decreased sales volume was driven by overall milder weather during 2023 as compared to 2022, which resulted in a 17 percent decline in cooling degree days. Although Winter Storm Elliott brought cold temperatures and record-setting demand to the Tennessee Valley region in late December 2022, these impacts were more than offset by TVA experiencing milder weather during the remainder of 2023.

For LPCs, sales of electricity decreased primarily due to the weather impacts. For industries directly served, sales of electricity decreased across the majority of sectors, primarily resulting from changes in the economy and respective industry sectors and business-specific factors.

Financial Results

The following table compares operating results for 2023 and 2022:


Summary Consolidated Statements of Operations For the years ended September 30 (in millions)
	2023		2022		Change		Percent Change
Operating revenues	$	12,054	$	12,540	$	(486)	(3.9)	%
Operating expenses	10,360		10,129		231		2.3	%
Operating income	1,694		2,411		(717)		(29.7)	%
Other income, net	61		7		54		771.4	%
Other net periodic benefit cost	199		258		(59)		(22.9)	%
Interest expense	1,056		1,052		4		0.4	%
Net income	$	500	$	1,108	$	(608)	(54.9)	%

Operating Revenues. Operating revenues for the years ended September 30, 2023 and 2022, were $12.1 billion and $12.5 billion, respectively. The following table compares TVA's operating revenues for the periods indicated:


Operating Revenues by Customer Type For the years ended September 30 (in millions)
	2023		2022		Change		Percent Change
Operating revenues
Local power companies	$	10,903	$	11,291	$	(388)	(3.4)	%
Industries directly served	864		926		(62)		(6.7)	%
Federal agencies and other	135		154		(19)		(12.3)	%
Revenue capitalized during pre-commercial plant operations(1)	(3)		—		(3)		100.0	%

Other revenue	155		169		(14)		(8.3)	%
Total operating revenues	$	12,054	$	12,540	$	(486)	(3.9)	%

Note

(1) Represents revenue capitalized during pre-commercial operations at Colbert Combustion Turbine Units 9-11.

Table of Contents

and 2022.

TVA's rate structure uses pricing signals to indicate seasons and hours of higher cost to serve its customers and to capture a portion of TVA's fixed costs in fixed charges. The structure includes three base revenue components: time of use demand charges, time of use energy charges, and a grid access charge ("GAC"). The demand charges are based upon the customer's peak monthly usage. The energy charges are based on time differentiated kWh used by the customer. Both of these components can be significantly impacted by weather. The GAC captures a portion of fixed costs and is offset by a corresponding reduction to the energy rates. The GAC also reduces the impact of weather variability to the overall rate structure.

TVA has a Partnership Agreement option that better aligns the length of LPC power contracts with TVA's long-term commitments. Under the partnership arrangement, the LPC power contracts automatically renew each year and have a 20-year termination notice. The partnership arrangements can be terminated under certain circumstances, including TVA's failure to limit rate increases as provided for in the agreements going forward. Participating LPCs receive benefits including a 3.1 percent wholesale bill credit in exchange for their long-term commitment, which enables TVA to recover its long-term financial commitments over a commensurate period. As of September 30, 2023, 147 LPCs had signed the 20-year Partnership Agreement with TVA.

In 2021, the TVA Board approved a 2.5 percent monthly base rate credit, the Pandemic Recovery Credit, which was effective for 2022. In 2022, the TVA Board approved a 2.5 percent monthly base rate credit, which is an extension of the Pandemic Recovery Credit and was effective for 2023. These pandemic credits applied to service provided to TVA's LPCs, their large commercial and industrial customers, and TVA directly served customers. The pandemic credits were able to be offered as a result of TVA's financial and operational performance and ended September 30, 2023.

In addition to base revenues, the rate structure includes a separate fuel rate that includes the costs of natural gas, fuel oil, purchased power, coal, emission allowances, nuclear fuel, and other fuel-related commodities; realized gains and losses on derivatives purchased to hedge the costs of such commodities; and payments to states and counties in lieu of taxes ("tax equivalents") associated with the fuel cost adjustments. See Part I, Item 1, Business — Rates — Rate Methodology.

In August 2023, the TVA Board approved a 4.5 percent wholesale rate increase (excluding fuel) effective October 1, 2023. This adjustment is estimated to produce an additional $405 million of revenue during 2024.

The changes in revenue components are summarized below:


Changes in Revenue Components For the years ended September 30 (in millions)
	2023		2022(1)		Change		Percent Change
Base revenue
Energy revenue	$	4,687	$	4,873	$	(186)	(3.8)	%
Demand revenue	3,654		3,610		44		1.2	%
Grid access charge	589		590		(1)		(0.2)	%
Long-term partnership credits for LPCs	(199)		(199)		—		—	%
Pandemic relief credits	(225)		(228)		3		(1.3)	%
Other charges and credits(2)	(643)		(673)		30		(4.5)	%
Total base revenue	7,863		7,973		(110)		(1.4)	%
Fuel cost recovery	4,025		4,379		(354)		(8.1)	%
Off-system sales	14		19		(5)		(26.3)	%
Pre-commercial operations(3)	(3)		—		(3)		100.0	%
Revenue from sales of electricity	11,899		12,371		(472)		(3.8)	%
Other revenue	155		169		(14)		(8.3)	%
Total operating revenues	$	12,054	$	12,540	$	(486)	(3.9)	%

Notes

(1) For the year ended September 30, 2022, $12 million previously classified as Energy revenue was reclassified to Off-system sales to conform with current year presentation.

(2) Includes economic development credits to promote growth in the Tennessee Valley, hydro preference credits for residential customers of LPCs, and demand response credits allowing TVA to reduce industrial customer usage in periods of peak demand to balance system demand. See Note 17 — Revenue.

(3) Represents revenue capitalized during pre-commercial operations at Colbert Combustion Turbine Units 9-11.

Operating revenues decreased $486 million for the year ended September 30, 2023, as compared to the prior year, primarily due to a $354 million decrease in fuel cost recovery revenue. The $354 million decrease in fuel cost recovery revenue was driven by a $207 million decrease attributable to lower fuel rates and a $147 million decrease attributable to lower sales volume in 2023. The lower fuel rates were primarily due to lower natural gas prices. The lower sales volume was driven by

Table of Contents

overall milder weather in the Tennessee Valley region for 2023 as compared to 2022. In addition, there was a $110 million decrease in base revenue which was driven by a $127 million decrease due to lower sales volume partially offset by a $17 million increase attributable to higher effective rates. The increase in effective rates was primarily due to lower other charges and credits as compared to the prior year.

See Sales of Electricity above for further discussion of the change in the volume of sales of electricity and Operating Expenses below for further discussion of the change in fuel expense.

Operating Expenses. Operating expense components as a percentage of total operating expenses for 2023 and 2022 consisted of the following:


Operating Expenses For the years ended September 30 (in millions)
	2023		2022		Change		Percent Change
Operating expenses
Fuel	$	2,549	$	2,567	$	(18)	(0.7)	%
Purchased power	1,633		1,921		(288)		(15.0)	%
Operating and maintenance	3,372		2,986		386		12.9	%
Depreciation and amortization	2,213		2,054		159		7.7	%
Tax equivalents	593		601		(8)		(1.3)	%
Total operating expenses	$	10,360	$	10,129	$	231	2.3	%

The following table summarizes TVA's expenses for various fuels for the years indicated:


Fuel Expense for TVA-Operated Facilities(1) For the years ended September 30 (in millions)
	Fuel Expense By Source				Cost per kWh(4)
	2023		2022			2023		2022
Coal(2)	$	877	$	627		$	4.18	$	2.97
Natural gas and/or oil-fired(3)	1,293		1,590			3.74		4.37
Nuclear fuel	337		329			0.50		0.51
Total fuel	$	2,507	$	2,546		$	2.04	$	2.08

Notes

(1) Excludes effects of the fuel cost adjustment in the amounts of $42 million and $21 million for the years ended September 30, 2023 and 2022, respectively.

(2) Fuel expense related to oil consumed for startup at coal-fired facilities was $33 million and $30 million for the years ended September 30, 2023 and 2022, respectively.

(3) Fuel expense related to oil consumed for generation at natural gas and/or oil-fired facilities was $14 million and $2 million for the years ended September 30, 2023 and 2022, respectively.

(4) Total cost per kWh is based on a weighted average.

Fuel expense decreased $18 million for the year ended September 30, 2023, as compared to the prior year. This decrease was primarily due to a decrease in effective fuel rates due to lower natural gas prices and nuclear fuel efficiency gains,

Table of Contents

resulting in a $36 million decrease in fuel expenses. Additionally, fuel expense decreased $3 million due to lower demand for energy. Partially offsetting these decreases was an increase in fuel cost recovery of $21 million from the recognition of unplanned fuel costs that were deferred in the summer of 2022.

Purchased power expense decreased $288 million for the year ended September 30, 2023, as compared to the prior year. This decrease was primarily due to lower demand for energy due to overall milder weather and higher availability of nuclear generation resulting in a decrease of $335 million. Partially offsetting this decrease was an increase in fuel cost recovery of $45 million from the recognition of unplanned purchased power costs that were deferred in the summer of 2022, as well as an increase of $2 million from higher purchased power market prices.

Operating and maintenance expense increased $386 million for the year ended September 30, 2023, as compared to the prior year. This increase was primarily due to $110 million of increased payroll and benefit costs primarily due to labor escalation for cost of living increases and additional headcount to support operational needs, $73 million of increased expenditures related to TVA's New Nuclear Program, $43 million of increased outage expense primarily driven by increased scope for natural gas outages, Winter Storm Elliot, and power operations performance improvement activities, and $40 million of increased contract labor costs primarily related to power operations performance improvement activities and natural gas project work. In addition, there was an increase of other post-employment benefit expense of $37 million primarily due to the changes in discount rates.

Depreciation and amortization expense increased $159 million for the year ended September 30, 2023, as compared to the prior year, primarily driven by an increase of $85 million in depreciation expense associated with the retirements of Cumberland and Bull Run and an increase of $51 million in amortization expense of decommissioning costs recovered in rates. The remainder of the increase is primarily due to depreciation of additions to net completed plant. See Note 1 — Summary of Significant Accounting Policies — Property, Plant, and Equipment, and Depreciation — Depreciation.

Tax equivalents expense decreased $8 million for the year ended September 30, 2023, as compared to the prior year. This change is primarily driven by an decrease in the tax equivalents collected in the fuel cost recovery.

Generating Sources. The following tables show TVA's generation and purchased power by generating source as a percentage of all electrical power generated and purchased (based on kWh) for the periods indicated:


Total Power Supply by Generating Source For the years ended September 30 (millions of kWh)
	2023			2022

Nuclear	67,102	42	%	64,475	39	%
Natural gas and/or oil-fired(1)	34,467	22	%	36,259	22	%
Coal-fired	20,896	13	%	20,999	13	%

Hydroelectric	13,063	8	%	13,934	8	%
Total TVA-operated generation facilities(2)(3)	135,528	85	%	135,667	82	%
Purchased power (natural gas and/or oil-fired)(4)	13,703	9	%	18,352	11	%
Purchased power (other renewables)(5)	6,247	4	%	6,141	4	%

Purchased power (coal-fired)	2,722	1	%	2,753	2	%
Purchased power (hydroelectric)	1,591	1	%	2,543	1	%
Total purchased power(3)	24,263	15	%	29,789	18	%
Total power supply	159,791	100	%	165,456	100	%

Notes

(1) The generation for 2023 includes 99 million kWh of pre-commercial generation at Colbert Combustion Turbine Units 9-11.

(2) Generation from TVA-owned renewable resources (non-hydroelectric) is less than one percent for all periods shown and therefore is not represented in the table above.

(3) Raccoon Mountain Pumped-Storage Plant net generation is allocated against each TVA-operated generation facility and purchased power type for both the year ended September 30, 2023, and the year ended September 30, 2022. See Part I, Item 1, Business — Power Supply and Load Management Resources — Hydroelectric Pumped-Storage for a discussion of Raccoon Mountain Pumped-Storage Plant.

(4) Purchased power (natural gas and/or oil-fired) includes generation from Caledonia CC, which is currently a leased facility operated by TVA. Generation from Caledonia CC was 4,030 million kWh and 4,797 million kWh for the years ended September 30, 2023 and 2022, respectively.

(5) Purchased power (other renewables) includes purchased power from the following renewable sources: solar, wind, biomass, and renewable cogeneration. TVA sells the Renewable Energy Certificates ("RECs") resulting from some of this purchased power to certain customers.

In addition to power supply sources included here, TVA offers energy efficiency programs that effectively reduced 2023 energy needs by about 2,100 net cumulative gigawatt hours or 1.3%.

Table of Contents

Interest Expense. Interest expense and interest rates for 2023 and 2022 were as follows:


Interest Expense and Rates For the years ended September 30
	2023			2022			Percent Change
Interest expense(1)	$	1,056		$	1,052		0.4	%



Average blended debt balance(2)	$	20,613		$	20,596		0.1	%

Average blended interest rate(3)	4.92		%	4.96		%	(0.8)	%

Notes

(1) Includes amortization of debt discounts, issuance, and reacquisition costs, net.

(2) Includes average balances of long-term power bonds, debt of VIEs, and discount notes.

(3) Includes interest on long-term power bonds, debt of VIEs, and discount notes.

Total interest expense increased $4 million for the year ended September 30, 2023, as compared to the prior year. This was primarily driven by a $9 million increase from higher other interest, partially offset by a $5 million decrease from interest associated with the rates and balances of debt. The $9 million increase from higher other interest is primarily due to short-term interest rates on vendor deposits and customer prepayments being nearly four percentage points higher on average in 2023 as compared to 2022, along with higher average monthly balances on these vendor deposits and customer prepayments. The $5 million decrease from interest associated with debt is due to a $45 million decrease from lower average rates on long-term debt and $1 million decrease from lower balances on short-term debt partially offset by a $32 million increase from higher average rates on short-term debt and a $9 million increase from higher balances on long-term debt.

Other Income, Net

Other income, net increased $54 million for the year ended September 30, 2023, as compared to the prior year. This increase was primarily driven by market gains on TVA's Investment funds and increases in interest income due to higher interest rates as compared to the prior year.

Other Net Periodic Benefit Cost

Other net periodic benefit cost decreased $59 million for the year ended September 30, 2023, as compared to the prior year. Other net periodic benefit cost is subject to significant economic assumptions, such as changes in the discount rate used to measure the benefit plans, that can materially impact TVA. See Note 20 — Benefit Plans.

Liquidity and Capital Resources

Sources of Liquidity

TVA depends on various sources of liquidity to meet cash needs and contingencies. TVA's primary sources of liquidity

are cash from operations and proceeds from the issuance of short-term debt in the form of discount notes, along with periodic

issuances of long-term debt. TVA's balance of short-term debt typically changes frequently as TVA issues discount notes to

meet short-term cash needs and pay scheduled maturities of discount notes and long-term debt. TVA's next significant power bond maturity is $1.0 billion in September 2024. The periodic amounts of short-term debt issued are determined by near-term expectations for cash receipts, cash expenditures, and funding needs, while seeking to maintain a target range of cash and cash equivalents on hand.

In addition to cash from operations and proceeds from the issuance of short-term and long-term debt, TVA's sources of liquidity include four long-term revolving credit facilities totaling $2.7 billion, a $150 million credit facility with the United States Department of the Treasury ("U.S. Treasury"), and proceeds from other financings. See Note 14 — Debt and Other Obligations — Credit Facility Agreements. The TVA Board authorized TVA to issue power bonds and enter into other financing arrangements in an aggregate amount not to exceed $4.0 billion during 2024. In the second quarter of 2023, TVA issued $1.0 billion of power bonds maturing in March 2028. Other financing arrangements may include lease financings and sales of receivables, loans, or other assets.

The TVA Act authorizes TVA to issue Bonds in an amount not to exceed $30.0 billion outstanding at any time. Bonds outstanding, excluding unamortized discounts and premiums and net exchange gains from foreign currency transactions, at September 30, 2023 and 2022, were $19.5 billion (including current maturities) and $19.3 billion (including current maturities), respectively. The balance of Bonds outstanding directly affects TVA's capacity to meet operational liquidity needs and to strategically use Bonds to fund certain capital investments as management and the TVA Board may deem desirable. Other options for financing not subject to the limit on Bonds, including lease financings (see Lease Financings below and Note 11 — Variable Interest Entities), could provide supplementary funding if needed. Currently, TVA expects to utilize a combination of Bonds and additional power revenues through power rate increases to meet its ongoing operational liquidity needs while making

Table of Contents

planned capital investments through the decade. TVA may also utilize available federal funding through the Inflation Reduction Act of 2022 ("Inflation Reduction Act") and the Bipartisan Infrastructure Law ("BIL"), third party funding resources, or other funding sources. See Lease Financings, Key Initiatives and Challenges — Optimum Energy Portfolio — Decarbonization, Note 11 — Variable Interest Entities, and Note 14 — Debt and Other Obligations for additional information.

TVA may from time to time seek to retire or purchase its outstanding debt through cash purchases and/or exchanges for securities, in open market purchases, privately negotiated transactions, or otherwise. Such repurchases or exchanges, if any, will depend on prevailing market conditions, TVA's liquidity requirements, contractual restrictions, and other factors. The amounts involved may be material.

TVA may hold higher cash balances from time to time in response to potential market volatility or other business conditions. In addition, cash balances may include collateral received from counterparties.

Debt Securities. TVA's Bonds are not obligations of the U.S., and the U.S. does not guarantee the payments of principal or interest on Bonds. TVA's Bonds consist of power bonds and discount notes. Power bonds have maturities of between one and 50 years. At September 30, 2023, the average maturity of long-term power bonds was 14.43 years, and the weighted average interest rate was 4.61 percent. Discount notes have maturities of less than one year. Power bonds and discount notes have a first priority and equal claim of payment out of net power proceeds. Net power proceeds are defined as the remainder of TVA's gross power revenues after deducting the costs of operating, maintaining, and administering its power properties and tax equivalents, but before deducting depreciation accruals or other charges representing the amortization of capital expenditures, plus the net proceeds from the sale or other disposition of any power facility or interest therein. In addition to power bonds and discount notes, TVA had long-term debt associated with certain VIEs outstanding at September 30, 2023. See Lease Financing below, Note 11 — Variable Interest Entities, and Note 14 — Debt and Other Obligations for additional information.

Power bonds and discount notes are both issued pursuant to Section 15d of the TVA Act and pursuant to the Basic Tennessee Valley Authority Power Bond Resolution adopted by the TVA Board on October 6, 1960, as amended on September 28, 1976, October 17, 1989, and March 25, 1992 (the "Basic Resolution"). The TVA Act and the Basic Resolution each contain two bond tests: the rate test and the bondholder protection test.

Under the rate test, TVA must charge rates for power which will produce gross revenues sufficient to provide funds for operation, maintenance, and administration of its power system; tax equivalents; debt service on outstanding Bonds; payments to the U.S. Treasury in repayment of and as a return on the government's appropriation investment in TVA's power facilities (the "Power Program Appropriation Investment"); and such additional margin as the TVA Board may consider desirable for investment in power system assets, retirement of outstanding Bonds in advance of maturity, additional reduction of the Power Program Appropriation Investment, and other purposes connected with TVA's power business, having due regard for the primary objectives of the TVA Act, including the objective that power shall be sold at rates as low as are feasible. See Note 23 — Related Parties.

TVA fulfilled its requirement to repay $1.0 billion of the Power Program Appropriation Investment in 2014; therefore, the repayment of this amount is no longer a component of rate setting.

The rate test for the one-year period ended September 30, 2023, was calculated after the end of 2023, and TVA met the test's requirements.

Under the bondholder protection test, TVA must, in successive five-year periods, use an amount of net power proceeds at least equal to the sum of the depreciation accruals and other charges representing the amortization of capital expenditures and the net proceeds from any disposition of power facilities, for either the reduction of its capital obligations (including Bonds and the Power Program Appropriation Investment) or investment in power assets.

The bondholder protection test for the five-year period ended September 30, 2020, was calculated after the end of 2020, and TVA met the test's requirements. TVA must next meet the bondholder protection test for the five-year period ending September 30, 2025, and expects to meet the test.

TVA uses proceeds from the issuance of discount notes, in addition to other sources of liquidity, to fund short-term cash needs and scheduled maturities of long-term debt.

Table of Contents

The following table provides additional information regarding TVA's short-term borrowings.


Short-Term Borrowings (in millions)
	At September 30, 2023			For the year ended September 30, 2023			At September 30, 2022			For the year ended September 30, 2022
Gross Amount Outstanding (at End of Period) or Average Gross Amount Outstanding (During Period)
Discount notes	$	432		$	890		$	1,173		$	1,014
Maximum Month-End Gross Amount Outstanding (During Period)
Discount notes	N/A			$	1,864		N/A			$	2,062
Weighted Average Interest Rate
Discount notes	5.29		%	4.34		%	2.93		%	0.83		%

TVA ended the year at September 30, 2023, with a lower balance for both short-term debt and average short-term debt as compared to September 30, 2022. The decrease resulted primarily from the decision to issue $1.0 billion of power bonds in 2023 and the timing of cash flows.

TVA generally uses proceeds from the issuance of power bonds to refinance maturing power bonds or other financing obligations, as necessary, or for other power system purposes. The total balance of power bonds may decline in periods where redemptions of power bonds exceed issuance due to net positive cash flow from operating and investing activities. At this time, TVA anticipates the balance of Bonds and other financing obligations will increase in future years due to an expected increase in capital expenditures.

TVA issued $1.0 billion and $500 million of power bonds during 2023 and 2022, respectively. TVA redeemed $29 million and $1.0 billion of Bonds during 2023 and 2022, respectively. For additional information about TVA debt issuance activity and debt instruments issued and outstanding at September 30, 2023 and 2022, including rates, maturities, outstanding principal amounts, and redemption features, see Note 14 — Debt and Other Obligations — Debt Securities Activity and Debt Outstanding.

TVA Bonds are traded in the public bond markets and are listed on the New York Stock Exchange ("NYSE") except for TVA's discount notes, the 2009 Series B power bonds, and the power bonds issued under TVA's electronotes® program. TVA's Putable Automatic Rate Reset Securities ("PARRS") are traded on the NYSE under the exchange symbols "TVC" and "TVE." Other bonds listed on the NYSE are assigned various symbols by the exchange, which are noted on the NYSE's website. TVA has also listed certain bonds on foreign exchanges from time to time, including the Luxembourg, Hong Kong, and Singapore Stock Exchanges. See Part I, Item 1A, Risk Factors — Financial, Economic, and Market Risks for additional information regarding the market for TVA's Bonds.

Although TVA Bonds are not obligations of the U.S., TVA, as a corporate agency and instrumentality of the U.S. government, may be impacted if the sovereign credit ratings of the U.S. are downgraded. Additionally, TVA may be impacted by how the U.S. government addresses situations of approaching its debt limit. According to statements made by nationally recognized credit rating agencies, downward pressure on the ratings of the U.S. could eventually develop if there are no changes in current policies and budget deficits and the trajectory of debt continues to increase; additionally, current ratings factor in the prospect that debates over raising the debt limit of the U.S. government could continue to be protracted and difficult. In August 2023, Fitch Ratings ("Fitch") downgraded the U.S. government's credit rating to AA+, reflecting its perception of a deterioration in the U.S. public finances and challenges associated with raising the U.S. debt limit. Fitch subsequently downgraded TVA's rating from AAA to AA+. TVA has not been required to post additional collateral due to the downgrade. The outlook on the ratings of TVA is currently stable with Standard & Poor's Financial Services, LLC ("S&P") and Fitch. However, on November 10, 2023, Moody's Investors Service, Inc. ("Moody's") revised the outlook on the U.S. government's credit ratings from stable to negative, and subsequently determined on November 13, 2023, to revise the outlook on TVA's ratings from stable to negative. See Note 15 — Risk Management Activities and Derivative Transactions — Other Derivative Instruments — Collateral. TVA's rated senior unsecured Bonds are currently rated Aaa, AA+, and AA+, by Moody's, Fitch, and S&P, respectively. TVA's short-term discount notes are not rated.

Lease Financings. TVA has entered into certain leasing transactions with special purpose entities ("SPEs") to obtain third-party financing for its facilities. These SPEs are sometimes identified as VIEs of which TVA is determined to be the primary beneficiary. TVA is required to account for these VIEs on a consolidated basis. In addition, TVA previously entered into leasing transactions to obtain third-party financing for 24 peaking combustion turbine units ("CTs") as well as certain qualified technological equipment and software ("QTE"). See Note 11 — Variable Interest Entities and Note 14 — Debt and Other Obligations for information about TVA's lease financing activities.

Table of Contents

Summary Cash Flows

A major source of TVA's liquidity is operating cash flows resulting from the generation and sale of electricity. Cash, cash equivalents, and restricted cash totaled $521 million and $520 million at September 30, 2023 and 2022, respectively. A summary of cash flow components for the years ended September 30 follows:

Cash provided by (used in):

Operating Activities. TVA's cash flows from operations are primarily driven by sales of electricity, fuel expense, and operating and maintenance expense. The timing and level of cash flows from operations can be affected by the weather, changes in working capital, commodity price fluctuations, outages, and other project expenses.

Net cash flows provided by operating activities decreased $76 million for the year ended September 30, 2023, as compared to 2022. The decrease was primarily due to lower revenue collections from decreased sales of electricity primarily driven by overall milder weather during 2023 and higher cash payments related to TVA's New Nuclear Program, increased payroll and benefits costs due to labor escalation for cost of living increases, and higher cash paid for interest. These items were partially offset by an increase in collections of fuel cost recovery revenue due to timing and less fuel and purchased power payments due to milder weather and lower natural gas prices.

Investing Activities. The majority of TVA's investing cash flows are due to investments to acquire, upgrade, or maintain generating and transmission assets, including environmental projects and the purchase of nuclear fuel.

Net cash flows used in investing activities increased $331 million for the year ended September 30, 2023, as compared to the prior year primarily driven by the acquisition of leasehold interests in combustion turbine assets, construction of certain combustion turbines, transmission upgrades, and environmental projects. These increases were partially offset by expenditures for the Watts Bar Unit 2 steam generator replacement project, which was completed in the prior year.

Financing Activities. TVA's cash flows provided by or used in financing activities are primarily driven by the timing and level of cash flows provided by operating activities, cash flows used in investing activities, and net issuance and redemption of debt instruments to maintain a strategic balance of cash on hand.

Net cash flows provided by financing activities increased $406 million for the year ended September 30, 2023, as compared to the prior year, primarily due to higher net debt issuances and lower payments on leaseback transactions. Lower net cash flows provided by operating activities and higher net cash used in investing activities in 2023 resulted in the need for net debt issuances to maintain targeted cash balance levels during the period. TVA anticipates to have a need to increase debt in the coming years as it continues to invest in power system assets, which may result in positive net cash flows provided by financing activities in future periods.

Table of Contents

Cash Requirements

Actual capital expenditures and future planned capital expenditures for property, plant, and equipment additions, including environmental projects and new generation, and nuclear fuel are as follows:


Capital Expenditures For the years ended September 30 (in millions)
	Actual			Estimated Capital Expenditures(1)
	2023			2024		2025		2026		2027		2028
Capacity expansion expenditures	$	1,069		$	1,747	$	3,156	$	2,377	$	2,694	$	1,179
Environmental expenditures(2)	196			200		171		79		34		9
Nuclear fuel	223			263		259		411		370		465
Transmission expenditures	715			677		1,114		869		595		449
Other capital expenditures(3)	793			1,211		1,199		986		988		839
Total capital expenditures	$	2,996	(4)	$	4,098	$	5,899	$	4,722	$	4,681	$	2,941

Notes

(1) Currently, TVA expects to utilize a combination of Bonds and additional power revenues through power rate increases to meet its ongoing operational liquidity needs while making planned capital investments through the decade. TVA may also utilize available federal funding through the Inflation Reduction Act and the BIL, third party funding resources, or other funding sources. Estimated capital expenditures only include expenditures that are currently planned. Additional expenditures may be required, among other things, for TVA to meet growth in demand for power in its service area or to comply with new environmental laws, regulations, or orders.

(2) Table includes capital portion of estimated environmental expenditures. See Part I, Item 1, Business — Environmental Matters — Estimated Required Environmental Expenditures for total estimates on projects related to environmental laws and regulations.

(3) Other capital expenditures are primarily associated with short lead time construction projects aimed at the continued safe and reliable operation of generating assets.

(4) The numbers above include the change in construction in progress and nuclear fuel expenditures included in Accounts payable and accrued liabilities of $42 million.

TVA continually reviews its capital expenditures and financing programs. The amounts shown in the table above are forward-looking amounts based on a number of assumptions and are subject to various uncertainties. Amounts may differ materially based upon a number of factors, including, but not limited to, changes in assumptions about system load growth, environmental regulation, rates of inflation, total cost of major projects, and availability and cost of external sources of capital. See Forward-Looking Information and Part I, Item 1A, Risk Factors.

TVA has certain obligations and commitments to make future payments, including contracts executed in connection with certain of the planned construction expenditures. TVA estimates total commitments and contingencies at September 30, 2023, are approximately $5.6 billion for the year ended September 30, 2024, and $44.4 billion for the years thereafter, of which $3.5 billion and $19.5 billion, respectively, are set forth in the table below. See Note 8 — Leases, Note 11 — Variable Interest Entities, Note 14 — Debt and Other Obligations, Note 20 — Benefit Plans and Note 22 — Commitments and Contingencies for the obligations and commitments attributable to leases, VIEs and membership interests of VIEs subject to mandatory redemption, debt and leaseback obligations, the retirement plan, and unconditional purchase obligations, respectively, for remaining amounts.


Other Commitments and Contingencies Payments due for the years ending September 30 (in millions)
	2024		2025		2026		2027		2028		Thereafter		Total

Interest payments relating to debt(1)	$	995	$	966	$	912	$	851	$	815	$	11,195	$	15,734

Interest payments relating to debt of VIEs	45		44		42		40		39		285		495
Interest payments relating to membership interests of VIEs subject to mandatory redemption	1		1		1		1		1		3		8





Purchase obligations
Power(2)	354		174		123		56		36		392		1,135
Fuel(3)	1,621		972		497		305		256		886		4,537
Other(4)	461		308		78		26		35		127		1,035


Flood response commitment to NRC	1		1		1		—		—		27		30






Total	$	3,478	$	2,466	$	1,654	$	1,279	$	1,182	$	12,915	$	22,974

Notes

(1) Includes the effects of interest rate derivatives employed to manage interest rate risk.

(2) Includes commitments for energy and/or capacity under power purchase agreements ("PPAs") from hydroelectric, diesel, renewable, and gas-fired facilities, as well as transmission service agreements to support purchases of power from the market. Certain PPAs are accounted for as leases and have lease and non-lease components. For these contracts, the lease component is included in lease obligations (see Note 8 — Leases) and the non-lease component is included in power purchase obligations in the table above. For PPA contracts containing a lease component that have not commenced, the entire commitment amount is included in the table above.

Table of Contents

(3) Includes commitments to purchase nuclear fuel, coal, and natural gas, as well as related transportation and storage services.

(4) Primarily includes long-term service contracts, contracts that contain minimum purchase levels for the purchase of limestone along with related storage and transportation, and contractual obligations related to TVA's load control program.

EnergyRight® Program. TVA purchases certain loans receivable from its LPCs in association with the EnergyRight® program. Depending on the nature of the energy-efficiency project, loans may have a maximum term of five years or 10 years. The loans receivable are then transferred to a third-party bank with which TVA has agreed to repay in full any loan receivable that has been in default for 180 days or more or that TVA has determined is uncollectible. At September 30, 2023, the total carrying amount of the loans receivable, net of discount, was $59 million. Such amounts are not reflected in the Other Commitments and Contingencies table above. The total carrying amount of the financing obligation was $69 million at September 30, 2023. See Note 9 — Other Long-Term Assets and Note 12 — Other Long-Term Liabilities for additional information.

Key Initiatives and Challenges

Optimum Energy Portfolio

TVA must continuously evaluate all generating assets to ensure an optimal energy portfolio that provides safe, clean, and reliable power while maintaining flexibility and fiscal responsibility to the people of the Tennessee Valley. TVA is making investments in its generating portfolio and infrastructure to modernize the fleet and help meet growing demand for electricity while also allowing TVA to maintain competitive rates and high reliability and work toward an increasingly clean power system. As TVA continues to evaluate the impact of retiring its coal-fired fleet by 2035 and works to accelerate the growth of renewables, it also continues to evaluate adding flexible lower carbon-emitting gas plants as a strategy to maintain reliability. TVA is also evaluating other capacity expansion projects. In addition, TVA is committed to investing in the future of nuclear with the evaluation of emerging advanced nuclear technologies, such as small modular reactors ("SMRs"), and is increasing its renewable energy portfolio by securing PPAs and developing projects such as TVA's Self-Directed Solar. It is also investing in research and development for decarbonization technologies including battery storage, carbon capture, carbon sequestration and utilization, new hydroelectric pumped-storage, energy efficiency, demand response, electrification, commercial resiliency, and hydrogen.

TVA is developing its next Integrated Resource Plan ("IRP"), which will provide TVA direction on how to best meet future electricity demands from now to 2050. As part of the IRP process, and in alignment with the National Environmental Policy Act ("NEPA"), TVA will analyze potential environmental impacts associated with the IRP by preparing an EIS. In May 2023, TVA published the notice of intent, which is the first step in the NEPA process. The IRP process includes extensive engagement from the public and stakeholders and is expected to be complete in CY 2024.

TVA is also partnering with the University of Tennessee Baker School for Public Policy and Public Affairs and with diverse stakeholders from across the Tennessee Valley to conduct a Valley Pathways Study, focused on building a competitive and clean economy for the Tennessee Valley. This study will examine potential scenarios for all economic sectors across the Tennessee Valley that will support sustainable growth and a viable and preferred decarbonization pathway.

In addition, in August 2023, the TVA Board rescinded its previous declaration of surplus property for the Bellefonte Nuclear Plant site as it evaluates the site for potential future generation needs.

Coal-Fired Fleet. TVA is evaluating the impact of retiring the balance of the coal-fired fleet by 2035. TVA will prepare environmental reviews pursuant to NEPA prior to making a decision on retiring or building any plant. In 2022, TVA made available and received public input on a draft EIS to assess the impacts associated with the potential retirement of Cumberland and the construction and operation of facilities to replace part of that generation. The final EIS was published in December 2022, and TVA documented its final decision with the Record of Decision on January 10, 2023. TVA plans to retire the two coal-fired units at Cumberland, which at September 30, 2023, accounted for 2,470 MW of TVA's summer net capability. TVA plans to replace generation for one unit with a 1,450 MW combined cycle plant that is expected to be operational by the end of CY 2026 when the first unit is scheduled to be retired. See Natural Gas-Fired Units below.

The second unit is scheduled to be retired by the end of CY 2028, and in May 2023, TVA published the notice of intent to conduct an EIS to study potential environmental impacts associated with the proposed construction and operation of facilities to replace part of that generation. TVA could spend up to $1.2 billion on the construction of facilities to replace part of the generation for the second unit.

On May 12, 2023, TVA made available to the public a draft EIS to assess the impacts associated with the potential retirement of Kingston Fossil Plant ("Kingston") and the construction and operation of facilities to replace part of that generation. TVA asked for public input on the draft EIS during the 45-day public comment period of May 19, 2023 through July 3, 2023. TVA is currently reviewing comments submitted on the draft EIS, and a final EIS is expected to be published by the second quarter of 2024. TVA could spend up to $2.8 billion on the construction of facilities to replace part of that generation.

Natural Gas-Fired Units. As TVA continues to evaluate the impact of retiring its coal-fired fleet by 2035 and works to accelerate the growth of renewables, it also continues to evaluate adding flexible lower carbon-emitting gas plants as a strategy to maintain reliability. During 2019, the TVA Board approved an expansion of peaking gas replacement capacity at two

Table of Contents

combustion turbine gas facilities, contingent on the successful completion of environmental reviews under NEPA and other applicable laws. In 2020, detailed design and engineering work began at TVA’s Paradise and Colbert sites to further scope out the projects and supply information needed for the NEPA review. In 2021, environmental reviews under NEPA and other applicable laws were complete, and TVA received the air permits for the Paradise and Colbert facilities. Commercial plant operations began on Colbert Combustion Turbine Units 9-11 on July 25, 2023, with a total summer net capability of 681 MW. As of September 30, 2023, TVA had spent $329 million on this expansion, and TVA expects to spend an additional $56 million. Pre-commercial plant operations began on Paradise Combustion Turbine Units 5-7 in the first quarter of 2024, and all three new units are anticipated to enter commercial operations by the end of CY 2023, with an expected summer net capability of 681 MW. As of September 30, 2023, TVA had spent $372 million on this expansion, and TVA expects to spend an additional $44 million.

A 500 MW aeroderivative CT project at TVA’s Johnsonville site has been approved for $599 million, contingent on the successful completion of environmental reviews under NEPA and other applicable laws. In 2020, detailed design and engineering work began to further scope out the project and supply information needed for the NEPA review. In 2022, environmental reviews under NEPA and other applicable laws were completed, and TVA received the air permits for the Johnsonville facility. As of September 30, 2023, TVA had spent $486 million on this project. TVA expects to spend an additional $113 million on this project and anticipates the project to enter commercial operations by the end of CY 2024. See Note 22 — Commitments and Contingencies — Legal Proceedings — Case Involving Johnsonville Aeroderivative Combustion Turbine Project for a discussion of a lawsuit involving this project.

As discussed in Coal-Fired Fleet above, TVA is replacing generation for one unit at Cumberland with a 1,450 MW combined cycle plant that is expected to be operational by the end of CY 2026 when this first unit is scheduled to be retired. As of September 30, 2023, TVA had spent $229 million on this project, and expects to spend an additional $1.9 billion through CY 2026. See Note 22 — Commitments and Contingencies — Legal Proceedings — Case Involving Cumberland Combined Cycle Plant for a discussion of a lawsuit involving this project.

TVA is also exploring a 200 MW aeroderivative CT project at TVA's Allen site and a 500 MW simple cycle CT project at TVA's Caledonia site contingent on the successful completion of environmental reviews under NEPA and other applicable laws. As of September 30, 2023, TVA had spent $108 million on long lead time equipment that could be used at any site, and could spend up to an additional $738 million on these projects.

Decarbonization. TVA's decarbonization initiative is aimed at understanding and applying clean resources to support the reduction of carbon emissions from its power supply. Related to its carbon reduction efforts, TVA has established six guiding principles which are as follows:

•Prioritize the needs of Tennessee Valley stakeholders as TVA works to achieve its goals by maintaining low rates and high reliability, and attracting new jobs in the Tennessee Valley.

•Use best-available science and support research and policies that further carbon-free dispatchable technologies.

•Partner with LPCs and other customers and communities to support economy-wide decarbonization efforts and the strategic electrification of other sectors, such as transportation.

•Maintain nuclear generation, hydro generation, and a strong transmission grid as key enabling assets.

•Be transparent with stakeholders in measuring and sharing TVA's progress, and listen and work effectively with all its stakeholders to understand their priorities and needs.

•Adapt to new technologies and changing policies, and be willing and open to changing TVA's plans and projects to achieve deep carbon reduction.

Exploration. As part of the decarbonization efforts, in 2022, the TVA Board approved a programmatic approach to exploring advanced nuclear technology, which is one of several technologies TVA is exploring. Other decarbonization technologies TVA is exploring in addition to advanced nuclear include battery storage, carbon capture, carbon sequestration and utilization, new hydroelectric pumped-storage, energy efficiency, demand response, electrification, commercial resiliency, and hydrogen. TVA also is increasing its renewable energy portfolio to work towards carbon emission reductions and meet customer preferences by investing in existing assets, encouraging renewable power through various current programs and offerings, and securing renewable PPAs through RFPs, among others. See below, Part I, Item 1, Business — Power Supply and Load Management Resources — Renewable Energy Resources and Demand Management Portfolio, and Part I, Item 1, Business — Research and Development for further discussion of TVA's decarbonization efforts. See also Part I, Item 1, Business — Environmental Matters — Climate Change for a discussion of the impact of executive actions and climate-related regulations on TVA.

Federal Funding Legislation. TVA is currently evaluating and seeking potential funding opportunities under the Inflation Reduction Act and the BIL to support its decarbonization efforts. In 2022, President Biden signed into law the Inflation Reduction Act. Among other things, the Inflation Reduction Act makes certain tax-exempt entities, including TVA, eligible for a direct-pay

Table of Contents

option for certain tax credits that encourage investment in clean energy. In addition, in 2022, President Biden signed into law the BIL, a spending bill that, among other things, created new federal grants, direct pay, and incentive programs for a wide variety of eligible entities and activities. In many cases, TVA is directly or indirectly eligible to seek BIL funded opportunities through agency-sponsored and implemented funding opportunities. While TVA intends to seek to take advantage of these funding opportunities to the extent practically and legally feasible, any net financial value of these incentives for TVA is yet to be determined and is heavily dependent on numerous factors, including TVA’s need to comply with environmental and least-cost-planning laws as a condition of planning and completing qualifying projects, market conditions (including interest rates, resources availability, and project cost inflation, which is predictably impacted by the availability of the tax credits), costs of compliance with the funding requirements, TVA’s ability to leverage flow-through of tax credit value in power purchase agreement pricing and other financial terms, the continued availability of such funding across several federal political cycles, TVA’s debt financing capabilities, and future Internal Revenue Service ("IRS") guidance on key provisions of the Inflation Reduction Act. TVA continues to evaluate the Inflation Reduction Act, the BIL, IRS guidance, and other related matters. In November 2022, TVA and other major utility companies responded to a funding opportunity from the DOE with the intention of obtaining federal financial support for a Southeast Hydrogen Hub. The Southeast Hydrogen Hub was notified in October 2023 that their application was not among those funded.

Renewable Power Purchase Agreements. In recent years, TVA has issued requests for proposals ("RFPs") in order to meet customer preferences and requirements for cleaner energy. TVA will procure the renewable energy and sell the resulting

RECs to specific customers, allowing TVA to increase its renewable energy portfolio without additional costs to other TVA customers. These agreements help to align the core values of TVA and the public power model with the desire of TVA's customers for renewable energy. TVA issued an RFP during 2021 for up to 200 MW of new renewable energy. In December 2022, TVA signed four PPAs for a total of 160 MW of solar generation expected to come online in 2025. TVA also issued a carbon-free RFP in July 2022 for up to 5,000 MW of carbon-free and renewable energy projects. This RFP includes a broad range of potential generation sources, including nuclear, green gas, solar, storage, and wind, among others. TVA anticipates making selections for the carbon-free RFP by the end of CY 2023.

In addition, TVA’s existing solar PPA portfolio is not immune from the challenges affecting the U.S. solar industry. Similar to the experience of the rest of the industry, the majority of TVA’s contracted PPAs from previous RFPs that are not yet online have been impacted by project delays and price increases. In the second quarter of 2023, one of the counterparties failed to comply with the terms of its PPA. TVA terminated the agreement, which includes 66 MW of solar and 66 MW of battery storage, due to the counterparty's default.

Self-Directed Solar. During 2019, the TVA Board approved the opportunity for TVA to explore being directly involved in the development of a utility-scale solar project, contingent on the successful completion of environmental reviews under the NEPA and other applicable laws. In 2021, TVA purchased land for this development and in 2022, environmental reviews were complete. The challenges affecting TVA’s RFPs are also being seen in TVA’s Self-Directed Solar project. This has resulted in a delay in the estimated completion, with the project now expected to be complete by the end of CY 2027. The project has also experienced cost increases due to escalations from supply chain limitations. As of September 30, 2023, TVA had spent $49 million on the 200 MW project and expects to spend an additional $416 million.

In November 2022, the TVA Board approved the opportunity for TVA to explore the development of an additional utility-scale solar project, contingent on successfully completing environmental reviews under the NEPA and other applicable laws and obtaining the necessary state permits. The project would utilize TVA-owned land, deploying a solar cap system on the closed CCR facility at the TVA Shawnee Fossil Plant in Paducah, Kentucky. As of September 30, 2023, TVA had spent $49 million on the 99 MW project and expects to spend an additional $167 million.

Small Modular Reactors. In December 2019, TVA became the first utility in the nation to successfully obtain approval for an early site permit from the Nuclear Regulatory Commission ("NRC") to potentially construct and operate SMRs at TVA’s Clinch River Nuclear Site. The permit is valid through 2039 and therefore provides TVA a great deal of flexibility to make new nuclear decisions based on energy needs and economic factors. In 2021, TVA initiated a Programmatic EIS ("PEIS") that evaluates a variety of alternatives for a proposed advanced nuclear technology park at the Clinch River Nuclear Site and will provide additional flexibility for future decision making. The PEIS was issued for public comment in March 2022, and the Record of Decision was signed in September 2022.

In 2022, the TVA Board approved the New Nuclear Program and approved up to $200 million to explore advanced reactor technology options. Of this amount, TVA had spent $100 million as of September 30, 2023. The New Nuclear Program provides a systematic roadmap for TVA’s exploration of advanced nuclear technology. Collaboration with other interested parties will be an important aspect of this program, and TVA has entered into several agreements with technology progressive organizations that allow for mutual collaboration to explore advanced reactor designs as a next-generation nuclear technology. In December 2022, TVA entered into a multi-party collaborative arrangement to advance the global deployment of the GE Hitachi Nuclear Energy ("GEH") BWRX-300 SMR. GEH is responsible for standard design development. See Note 21 — Collaborative Arrangement for additional information. One of the first tasks the New Nuclear Program is pursuing is a project to develop an NRC construction permit application at the Clinch River Nuclear Site. In addition, while evaluating alternatives for potential advanced nuclear at the Clinch River Nuclear Site, TVA is exploring the feasibility of applying a similar approach that could deploy additional SMRs at Clinch River and other TVA-owned properties.

Table of Contents

The decision to potentially build SMRs continues to be part of the ongoing discussion as part of the asset strategy for TVA’s future generation portfolio, and any future decision to construct any reactor, advanced or otherwise, would require approval by the TVA Board and the NRC. As of September 30, 2023, TVA had spent $191 million to date on work regarding SMRs, including work to complete the early site permit application for the Clinch River Nuclear Site and work associated with the New Nuclear Program above. Of these amounts, the U.S. Department of Energy ("DOE") had reimbursed TVA $29 million. Additional expenditures will be determined based on future project development.

Nuclear Fleet License Extensions. Subject to the completion of all appropriate environmental reviews, TVA is seeking to renew all nuclear generation units' licenses for an additional 20 years. The first license renewal application is expected to be submitted to the Nuclear Regulatory Commission ("NRC") in January 2024 for the three units at Browns Ferry. As of September 30, 2023, TVA had spent $25 million to support the subsequent license renewal ("SLR") of the three units at Browns Ferry and expects to spend an additional $16 million to complete the Browns Ferry SLR.

Fiber Optic Network. In 2017, the TVA Board authorized up to $300 million to be spent over the next 10 years, subject to annual budget availability and necessary environmental reviews, to build an enhanced fiber optic network that will better connect TVA's operational assets. Fiber is a vital part of TVA's modern communication infrastructure. The new fiber optic lines will improve the reliability and resiliency of the generation and transmission system while enabling the system to better accommodate DER as they enter the market. As of September 30, 2023, TVA had spent $245 million on installation of the fiber optic lines and expects to spend an additional $55 million through 2027.

System Operations Center. A new system operations center was approved by the TVA Board. The new secured facility is being built to accommodate a new energy management system and adapt to new regulatory requirements, and will improve reliability, have improved physical security from the previous center, and be flexible to help accommodate operational growth requirements, including future renewables. Construction of the facility is expected to be complete in CY 2024, and the facility is expected to be fully operational in CY 2026. As of September 30, 2023, TVA had spent $263 million on the project and expects to spend an additional $69 million.

Energy Management System. A new energy management system was approved by the TVA Board. As the current energy management system is nearing the end of its life cycle, this project will replace the existing analog system with a digital system. The new digital system will have higher capacity and speed for communications with the TVA grid and for inputs from monitoring equipment, will network the new control center with existing locations, and will enable better remote visibility and control to help mitigate reliability implications of climate change. The system is expected to be complete in CY 2027. As of September 30, 2023, TVA had spent $59 million on the project and expects to spend an additional $49 million.

Automated Energy Exchange Platform. In October 2021, an automated energy exchange, the Southeast Energy Exchange Market ("SEEM"), took effect. The exchange was created to facilitate more short-term power exchanges and will be an enhancement to the existing market. TVA completed the appropriate environmental reviews, and during the third quarter of 2022, the TVA Board approved the creation of a zero-cost, non-firm transmission service to allow TVA to participate in SEEM. In November 2022, the SEEM market began transacting.

On July 14, 2023, the United States Court of Appeals for the District of Columbia Circuit ("D.C. Circuit") remanded the Federal Energy Regulatory Commission's ("FERC") approval of SEEM, sending the matter back to FERC for additional proceedings. Among other things, the D.C. Circuit found that FERC failed to provide adequate explanations for its acceptance of SEEM’s market design and for whether SEEM’s zero-cost transmission rates transformed SEEM into a loose power pool, which would require a joint tariff to be filed with FERC allowing open membership and access to pool transmission for non-members. TVA is evaluating the impact of the D.C. Circuit opinion and cannot predict the outcome of the D.C. Circuit’s remand at FERC or any future or related proceeding.

Federal Funding Project Management Office. In 2023, TVA established a new Federal Funding Project Management Office (“FFPMO”). The FFPMO will govern and support TVA’s federal funding strategy to help position TVA and Tennessee Valley partners to leverage funding from the Inflation Reduction Act and the BIL. The FFPMO is responsible for overseeing opportunities, assessing TVA's BIL and Inflation Reduction Act eligibility, prioritizing and coordinating proposal development, and seeking to capture funding opportunities for TVA. The FFPMO also acts as a conduit for LPCs and business partners to potentially access the Inflation Reduction Act and BIL funds. TVA is currently exploring funding opportunities of various types, including opportunities involving pumped-storage, solar, carbon capture, hydrogen, and transmission, among others. This exploration does not guarantee that TVA or its partners will receive any funds. See Decarbonization above for a discussion of potential financial impacts and related challenges of the Inflation Reduction Act and BIL.

Electric Vehicles

TVA is partnering with LPCs and others to support the electrification of transportation in the Tennessee Valley in a multi-year electric vehicle ("EV") initiative. The initiative focuses on reducing or eliminating EV market barriers by setting EV policies, improving charging infrastructure availability, expanding EV availability and offerings, and spreading EV consumer awareness. In 2021, the TVA Board approved new policies and an optional wholesale EV rate aimed at encouraging the development of charging infrastructure in the Tennessee Valley. The updated policies enable LPC investment in public charging infrastructure

Table of Contents

and allow for the conditional resale of electricity, for transportation purposes only, by any charging developer on a $/kWh basis. The optional wholesale rate was developed with high power EV charging in mind and provides a stable option for those developing charging infrastructure.

TVA is also working with LPCs, state agencies, and third-party charging developers to create the Fast Charge Network. This will be a foundational network of public fast charging stations at least every 50 miles along interstates and major highways across its seven-state service area. In 2021, TVA began a partnership with the State of Tennessee for the development and funding of Fast Charge Tennessee, the portion of the Fast Charge Network that covers Tennessee, and in 2022 TVA launched the Fast Charge Network. As of September 30, 2023, 15 sites were complete and operational with 55 additional sites under contract for development. TVA had spent $2 million on fast charging network charging stations as of September 30, 2023. TVA also plans to electrify 100 percent of its light-duty and 50 percent of its medium-duty vehicles in the TVA fleet. The adoption of EVs in the Tennessee Valley continues to grow, and TVA is working to ensure that the benefits of this rapid growth are secured, while also helping LPCs proactively avoid issues in their distribution systems. Also in 2021, TVA and five other major utilities formed the Electric Highway Coalition to develop a network of fast charging stations along all major highway routes within their service area. Since formation, the Electric Highway Coalition has gained significant interest from additional utilities and other EV collaboratives. In 2022, the Electric Highway Coalition merged with the Midwest Electric Vehicle Charging Infrastructure Collaboration to create the National Electric Highway Coalition with members committed to coordinate the development of EV charging infrastructure across the central U.S.

Sustainability and Social Responsibility

Sustainability has been and continues to be a focus in support of TVA's mission to deliver affordable and reliable energy, steward the environment, and create sustainable economic growth. TVA has a Chief Sustainability Officer (“CSO”) who oversees an Enterprise Wide Environmental Executive Council, a Sustainability Steering Committee, and a Sustainability Working Group, which together are responsible for the governance of sustainability at TVA. The CSO is also a member of TVA’s Risk Management Steering Committee.

TVA’s sustainability work is categorized into four areas:

•Economic Impact — Partnering to build the region’s clean energy economy

•Environment — Stewarding the region’s resources

•Social — Serving people and communities across the region

•Governance — Driving progress through accountability and transparency

Economic Impact

Environment

Social

Governance

Energy affordability

Climate change and resilience

Health and safety

Transparency

Reliability and resiliency

Air quality

Environmental justice

Board and executive diversity

Jobs created and retained

Water quality and availability

Community vitality and engagement

Systemic risk management

Flood and drought management

Waste management

Reservoir and stewardship benefits

Ethics

Energy innovations

Habitat and biodiversity protection

Local power company partnerships

Cyber and physical security

Renewable energy

Cultural resource management

Diversity and inclusion

Sustainable financing framework

Investor relations

Labor relations

Supplier partners

Recruitment, development, and retention

Skilled workforce availability

TVA issued its 2022 Sustainability Report on May 10, 2023. This comprehensive Sustainability Report aligns with global reporting standards and will serve as a baseline for annual corporate sustainability reporting. TVA also publishes two other sustainability-related documents: a Federal Sustainability Report and Implementation Plan, which addresses TVA's responsibilities related to federal sustainability performance, and an Environmental, Social, and Governance Sustainability Report, which uses a utility-focused and investor-driven reporting template developed by the Edison Electric Institute. TVA also

Table of Contents

issues other reports related to sustainability and social responsibility, including a Diversity, Equity, Inclusion and Accessibility ("DEIA") Report, which highlights the actions TVA has taken in the DEIA area, the results achieved, and the plans to continue to focus and improve, among other reports.

Operational Challenges

Extreme Flooding Preparedness. Updates to the TVA analytical hydrology model completed in 2009 indicated that under "probable maximum flood" conditions, some of TVA's dams might not have been capable of regulating the higher flood waters. A "probable maximum flood" is an extremely unlikely event; however, TVA has a responsibility to provide protection for its nuclear plants against such events. As a result, TVA installed a series of modifications at four dams.

Since 2009, TVA has performed further hydrology modeling of portions of the TVA watershed using updated modeling tools. Hydrology models were submitted for Sequoyah Nuclear Plant ("Sequoyah") Units 1 and 2 in 2012. However, concerns regarding TVA dam stability and revised hydrology analyses led to the submittal of a new hydrologic analysis for Sequoyah Units 1 and 2 in 2020. To resolve additional dam stability issues identified later in 2020, TVA submitted a revision to the Sequoyah model in April 2023. TVA plans to submit models for Watts Bar Nuclear Plant ("Watts Bar") Units 1 and 2 in CY 2023 to incorporate a methodology approved by the NRC subsequent to their review of a previous hydrology submittal for Watts Bar. TVA will subsequently address conditions at Browns Ferry as needed. As of September 30, 2023, TVA had spent $158 million on the modifications and improvements related to extreme flooding preparedness. TVA is deferring the decision on the need for additional modifications until after the modeling work is complete.

Winter Storm Elliott. In late December 2022, Winter Storm Elliott brought historic winter storm conditions across the majority of the U.S. The TVA service area sustained several days of single-digit temperatures and high winds and experienced record-setting power demand. On December 23, 2022, TVA broke its all-time record for single-day energy demand of more than 740 million kWh, as well as its highest winter peak power demand of 33,427 MW. Rain followed by extreme cold weather and wind caused operational challenges at several coal and natural gas-fired facilities, including freezing instrumentation, which resulted in a maximum unavailability of generation capacity of approximately 7,300 MW. TVA also encountered challenges in purchasing and importing generation from neighboring markets that were also experiencing high demand, which resulted in curtailments during TVA's peak demand periods.

As a result of these challenges, TVA implemented emergency operation plans previously established with its LPC and direct serve customers, which included public requests for broad conservation of power, curtailment of power to all customers on interruptible rates through TVA's demand response programs along with further requests to large customers to voluntarily reduce power consumption, and load reduction directives to LPCs to ensure the overall stability of the power grid. The load reduction directives were issued on two occasions, on December 23, 2022 for approximately two hours and on December 24, 2022 for approximately six hours, which resulted in rolling outages.

Although TVA faced challenges in acquiring power, TVA purchased a significant volume of power to help meet energy needs and experienced high prices during the winter storm event. TVA deferred $149 million of fuel and purchased power costs in December 2022 through its fuel cost adjustment primarily as a result of unplanned power purchases during the event. TVA began recognizing these deferred costs in expense in February 2023.

TVA has conducted a review of the actions taken both before and during the event to prepare for future needs and challenges. The review recommended actions to improve the reliability and resiliency of TVA's system, including developing design modification plans for each generating facility for both winter and summer peaks, improving cross-organizational coordination and communication, strengthening fuel resiliency strategy, updating load forecasting operations, enhancing emergency protocols, and updating processes for communicating with customers and key stakeholders, among others. In addition, TVA has already implemented numerous actions to increase operational resilience. These actions included placing more robust enclosures at generating facilities and enhancing insulation around instrumentation.

In addition, FERC, North American Electric Reliability Corporation ("NERC"), and NERC’s regional entities have opened a joint inquiry into the operations of the bulk power system during the winter weather conditions that occurred with Winter Storm Elliott. FERC has stated that the purpose of the joint inquiry is to further protect the reliability of the grid for future weather-related events. In November 2023, FERC, NERC, and NERC’s regional entities issued the final report regarding the inquiry. Among other things, the report recommends completion of additional cold weather reliability standard revisions for the electric industry and improvements to reliability for U.S. natural gas infrastructure through federal and/or state legislation and regulation.

Coal Combustion Residuals

Coal Combustion Residuals Facilities. TVA has committed to a programmatic approach for the elimination of wet storage of coal combustion residuals ("CCR") within the TVA service area. Under this program ("CCR Program"), TVA performed stability remediation, completed the conversion of all operational coal-fired plants to dry CCR storage, and is now closing all remaining wet storage facilities.

Table of Contents

Dry generation and dewatering projects. TVA has accomplished the conversion from wet to dry handling of CCR materials at all operating coal plants with the completion of dry generation and/or dewatering projects at Bull Run, Cumberland, Gallatin Fossil Plant ("Gallatin"), Kingston, and Shawnee Fossil Plant ("Shawnee").

Landfills. TVA has made strategic decisions to build and maintain lined and permitted dry storage facilities on TVA-owned property at some TVA locations, allowing these facilities to operate beyond existing dry storage capacity. Lined and permitted landfills are operational at Bull Run, Gallatin, Kingston, and Shawnee. TVA received the permit for the construction of a new lined landfill at Gallatin, and construction started in 2022. TVA received the permit for a new lined landfill at Cumberland in 2023, and TVA is evaluating the need for construction. Construction of additional lined and dry permitted storage facilities may occur to support future business requirements.

CCR facilities closures. TVA is working to close CCR facilities in accordance with federal and state requirements. Closure project schedules and costs are driven by the selected closure methodology (such as closure-in-place or closure-by-removal). Closure initiation dates are driven by environmental regulations. TVA's predominant closure methodology is currently closure-in-place, with exceptions at certain facilities, although the EPA has recently interpreted its CCR Rule in a way that could create significant additional costs with implementing closure. TVA issued an EIS in June 2016 that addresses the closure of CCR impoundments at TVA's coal-fired plants. TVA issued its associated Record of Decision in July 2016. Although the EIS was designed to be programmatic in order to address the mode of impoundment closures, it specifically addressed closure methods at 10 impoundments. TVA subsequently decided to close those impoundments. The method of final closure for each of these facilities will depend on various factors, including approval by appropriate state regulators and applicable closure requirements of state and federal regulations. Additional site-specific NEPA studies will be conducted as other facilities are designated for closure. See Note 13 — Asset Retirement Obligations.

Groundwater monitoring. Compliance with the Environmental Protection Agency's ("EPA's") CCR rule ("CCR Rule") required implementation of a groundwater monitoring program and ongoing analysis. In compliance with the CCR Rule, TVA published the results of the 2022 groundwater testing at its CCR facilities during the second quarter of 2023. Similar to prior years, the tests identified several CCR units with constituents at statistically significant levels above site-specific groundwater protection standards. TVA has completed an assessment of corrective measures ("ACM"), which analyzes the effectiveness of potential corrective actions, and has published ACM reports to its CCR Rule Compliance Data and Information website. Based on the results of the ACM, TVA is required to select a remedy as soon as feasible. TVA has selected remedies for two of its plants: a groundwater pump and treat system at the East Ash Disposal Area at Allen and monitored natural attenuation at Shawnee. TVA continues to investigate and evaluate remedies for its other plants and will continue posting semi-annual progress reports on the status of remedy selection until the final remedy is selected. The cost of these final remedies cannot reasonably be predicted until investigations and evaluations are complete and remedial methods are selected.

The final Part A revision to the CCR Rule became effective September 28, 2020. Among other things, the final Part A rule requires unlined CCR surface impoundments to stop receiving CCR and non-CCR waste streams and to initiate closure or retrofit by no later than April 11, 2021. TVA ceased sending CCR and non-CCR waste streams to, and initiated closure of, unlined CCR surface impoundments by the specified deadline.

As of September 30, 2023, TVA had spent approximately $2.9 billion on its CCR Program. Through 2028, TVA expects to spend an additional $1.6 billion on the CCR Program. Estimates for these amounts and costs after 2028 may change depending on the final closure method selected for each facility. While the conversion portion of the CCR Program is completed, TVA will continue to undertake CCR closure and storage projects, including building new landfill cells under existing permits and closing existing cells once they reach capacity.

TVA was involved in two lawsuits concerning the CCR facilities at Gallatin. One of these cases was decided in TVA's favor by the Sixth Circuit, and the other case was resolved by the entry of a consent order and agreement in Davidson County Chancery Court that became effective July 24, 2019. Under the consent order, TVA agreed to close the existing ash facility by removal, either to an on-site landfill or to an offsite facility. TVA may also consider options for beneficial reuse of the CCR. TVA submitted the removal plan for approval to the Tennessee Department of Environment and Conservation ("TDEC") and other applicable parties pursuant to the consent order, which was approved on November 7, 2023. In addition, TVA submitted an Environmental Assessment Report ("EAR") to TDEC, and TDEC approved the EAR on June 6, 2023. As required by the consent order, TVA will submit to TDEC and other applicable parties a Corrective Action/Risk Assessment Plan addressing groundwater at the site. See Note 13 — Asset Retirement Obligations.

In October 2019, TDEC released amendments to its regulations which govern solid waste disposal facilities, including TVA's active CCR facilities covered by a solid waste disposal permit and those which closed pursuant to a TDEC approved closure plan. Such facilities are generally subject to a 30-year post-closure care period during which the owner or operator must undertake certain activities, including monitoring and maintaining the facility. The amendments, among other things, add an additional 50-year period after the end of the post-closure care period, require TVA to submit recommendations as to what activities must be performed during this 50-year period to protect human health and the environment, and require TVA to submit revised closure plans every 10 years.

On May 18, 2023, the EPA issued a proposed rule expanding the federal CCR Rule to include legacy CCR units. If

Table of Contents

finalized in its current form, this proposed rule may significantly increase the number of federally regulated units in TVA’s fleet that will be subject to substantial costs for closure, post-closure, and potential remediation, and could have a material adverse effect on TVA's results of operations and financial condition. In addition, the EPA has recently interpreted its CCR Rule in a way that could create significant additional costs with implementing closure. See Part I, Item 1, Business — Environmental Matters — Cleanup of Solid and Hazardous Wastes — Coal Combustion Residuals.

Allen Groundwater Investigation. The CCR Rule required TVA to implement a comprehensive groundwater monitoring program at units subject to the rule. As a result of this groundwater monitoring program, TVA reported to TDEC in 2017 elevated levels of arsenic, lead, and fluoride in groundwater samples collected from two shallow-aquifer groundwater monitoring wells around the Allen East Ash Disposal Area. TVA, under the oversight of TDEC, conducted a remedial investigation into the nature and extent of the contamination.

The remedial investigation confirmed that the high arsenic, fluoride, and lead concentrations are limited to the shallow alluvial aquifer in the north and south areas of the Allen East Ash Disposal Area. These areas are not adversely impacting the Memphis aquifer, which is the source of the public drinking water supply. All samples taken from the Memphis aquifer through TVA production wells were within the EPA drinking water standards. As the result of a pumping test conducted on TVA production wells at the nearby Allen Combined Cycle Plant ("Allen CC") by the United States Geological Survey and the University of Memphis, TVA has committed to not using these production wells until additional data is generated that supports safe use. TVA constructed water tanks on site and is purchasing cooling water from MLGW in lieu of utilizing the production wells. Purchasing cooling water in combination with the use of water tanks, rather than wells, could impose some operational limitations, such as limitations on capacity, on the Allen CC due to lower availability of cooling water.

Pursuant to a remedial action plan that has been approved by TDEC, TVA has installed a groundwater pump and treat system at the East Ash Disposal Area. In addition, TVA is taking steps to close both the East Ash Disposal Area and the nearby West Ash Disposal Area. On November 29, 2021, after obtaining the necessary approvals from TDEC, TVA began removing CCR materials to an offsite, lined landfill, and removal activities are expected to continue through 2030.

Potential Liability Associated with Workers' Exposure to CCR Materials. In response to the 2008 ash spill at Kingston, TVA hired Jacobs Engineering Group, Inc. ("Jacobs") to oversee aspects of the cleanup. After the cleanup was completed, Jacobs was sued in the U.S. District Court for the Eastern District of Tennessee ("Eastern District") by employees of a contractor involved in the cleanup and family members of some of the employees. Other contractor employees and family members also filed lawsuits against Jacobs in the Eastern District. In the third quarter of 2023, Jacobs announced that it reached a global settlement that resolved all of these lawsuits. While TVA was not a party to any of these lawsuits, TVA may potentially have an indemnity obligation to reimburse Jacobs in some circumstances. TVA does not expect any potential liability to have a material adverse impact on its results of operations or financial condition. See Note 22 — Commitments and Contingencies — Contingencies.

Real Property Portfolio

TVA engages in ongoing Tennessee Valley-wide real property portfolio evaluations of buildings, structures, and land as part of the strategic real estate program, which focuses on reducing cost, right-sizing the portfolio, and aligning real estate holdings with TVA's strategic direction. In addition, TVA continues to operate in a hybrid work environment for those who do not have to be physically present at a TVA facility. In order to align the strategic real estate program with the current hybrid environment, TVA entered into new lease locations in Washington, D.C. and Nashville, Tennessee in 2023. TVA is evaluating its use of the Chattanooga Office Complex and issued an RFP in August 2023 to determine availability for a new Chattanooga, Tennessee facility based on TVA's workplace needs.

Supply Chain and Inflation Pressures

TVA continues to experience impacts due to inflation, supply chain material challenges, and labor availability. This has led to project delays, limited availability, and/or price increases for supplies and labor. TVA actively manages supply chain volatility with contracting, inventory strategies, and supplier engagement and support. Inflationary pressures are expected to persist in 2024 due in part to continued price volatility in some sectors. TVA is undertaking a cost optimization project to address these pressures. Business unit leaders will work to identify ways to partially offset cost increases expected for the years 2024 – 2026, with the goal to reduce planned cost increases over the three-year period. TVA has been able to manage these challenges with limited business disruptions at this time; however, should pressures continue long term, TVA could experience more significant disruptions and pressure to increase power rates.

Board Quorum

The terms of A.D. Frazier and Jeff W. Smith as members of the TVA Board ended January 3, 2023, with the

adjournment of the most recent session of Congress. Although their terms of office expired May 18, 2022, the TVA Act permitted them to continue to serve as Directors until the end of this session of Congress. On January 4, 2023, Beth P. Geer, L. Michelle Moore, Robert P. Klein, William J. Renick, Joe H. Ritch, and A. Wade White took their oath of office and began their service as members of the TVA Board. With these new Board members, TVA has a full nine-member Board. The term of Director Kilbride

Table of Contents

expired on May 18, 2023, although he is permitted under the TVA Act to remain in office until the earlier of the end of the current session of Congress or the date a successor takes office.

Safeguarding Assets

Physical Security — Non-Nuclear Asset Protection. TVA utilizes a variety of security technologies, security awareness activities, and security personnel to prevent sabotage, vandalism, and thefts. Any of these activities could negatively impact the ability of TVA to generate, transmit, and deliver power to its customers. TVA's Police and Emergency Management personnel are active participants with numerous professional and peer physical security organizations in both the electric industry and law enforcement communities.

TVA works with NERC, the SERC Reliability Corporation, the North American Transmission Forum, and other utilities to implement industry approved recommendations and standards.

Nuclear Security. Nuclear security is carried out in accordance with federal regulations as set forth by the NRC. These regulations are designed for the protection of TVA's nuclear power plants, the public, and employees from the threat of radiological sabotage and other nuclear-related terrorist threats. TVA has security forces to guard against such threats.

Cybersecurity. TVA operates in a highly regulated environment with respect to cybersecurity. TVA's cybersecurity program aligns or complies with the Federal Information Security Modernization Act, the NERC Critical Infrastructure Protection requirements, and the NRC requirements for cybersecurity, as well as industry best practices. As part of the U.S. government, TVA coordinates with and works closely with the U.S. Department of Homeland Security's Cybersecurity and Infrastructure Security Agency ("CISA") and the U.S. Computer Emergency Readiness Team ("US-CERT"). CISA serves as the agency assisting other federal entities in defending against threats and securing critical infrastructure. US-CERT functions as a liaison between the U.S. Department of Homeland Security and the public and private sectors to coordinate responses to security threats.

The risk of cybersecurity events such as malicious code attacks, unauthorized access attempts, and social engineering

attempts is intensifying across all industries, including the energy sector. TVA continues to see increases in malicious activity including phishing campaigns, malicious websites, distributed denial of service attacks, and activity related to business partner compromise, among others. These types of malicious activity have also been observed by TVA's external vendors, stakeholders, and partners, which has caused the need for heightened awareness and preparedness.

On May 12, 2021, President Biden signed EO 14028, "Improving the Nation's Cybersecurity." This EO is intended to improve the nation's cybersecurity posture and protect federal government networks by improving information-sharing between the U.S. government and the private sector on cyber issues and strengthening the United States' ability to respond to incidents when they occur. This EO is focused on specific goals and requirements including actions for zero trust architectures; cloud services; FedRAMP programs; supply chain and contracts; secure software development; endpoint detection and response, standardized vulnerability, and incident response operational plans; threat and vulnerability analysis; assessment and threat-hunting; event logging, monitoring, and retention; and information sharing. TVA continues to respond to the EO, associated Office of Management and Budget memorandums, and other emerging requirements in alignment with the order. TVA has submitted all reports as required, established response teams and an oversight structure, and initiated projects as necessary to address the required actions.

TVA is leveraging federal and other partners to better identify, detect, protect, and respond to these potential attacks.

TVA's risk-based cybersecurity program is utilized to identify and prioritize remediation and mitigation activities to reduce the risk to TVA. While TVA and its third-party vendors and service providers have been, and will likely continue to be, subjected to such attacks and attempts to disrupt operations, to date the attacks have not had a significant or material impact on business or operations and have not impacted TVA's ability to operate as planned. See Part I, Item 1A, Risk Factors — Cybersecurity and Information Technology Risks — TVA's facilities and information infrastructure may not operate as planned due to cyber threats to TVA's assets and operations.

Critical Accounting Estimates

TVA's consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP"), which require management to make estimates, judgments, and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Each of these estimates varies in regard to the level of judgment involved and its potential impact on TVA's financial results. Estimates are deemed critical either when a different estimate could have reasonably been used, or where changes in the estimate are reasonably likely to occur from period to period, and such use or change also would materially impact TVA's financial condition, results of operations, or cash flows. TVA's critical accounting policies are discussed in Note 1 — Summary of Significant Accounting Policies of the Notes to Consolidated Financial Statements.

TVA believes that its most critical accounting estimates relate to AROs, fair value measurements, and pension and other post-retirement benefits.

Table of Contents

Management has discussed the development, selection, and disclosure of critical accounting estimates with the Audit, Finance, Risk, and Cybersecurity Committee of the TVA Board. While TVA's estimates and assumptions are based on its knowledge of current events and actions it may undertake in the future, actual results may ultimately differ from these estimates and assumptions.

Asset Retirement Obligations

TVA recognizes legal obligations associated with the future retirement of certain tangible long-lived assets. These obligations relate to TVA's generating facilities, including coal-fired, nuclear, hydroelectric, and natural gas and/or oil-fired. They also pertain to coal ash impoundments, transmission facilities, and other property-related assets. Activities involved with the retirement of these assets could include decontamination and demolition of structures, removal and disposal of wastes, and site restoration. TVA periodically reviews its estimated ARO liabilities. Revisions to the ARO estimates are made whenever factors indicate that the timing or amounts of estimated cash flows have changed. Any change to an ARO liability is recognized prospectively as an equivalent increase or decrease in the carrying value of the capitalized asset. Any accretion or depreciation expense related to these liabilities and assets is charged to a regulatory asset. See Note 10 — Regulatory Assets and Liabilities — Nuclear Decommissioning Costs and Non-Nuclear Decommissioning Costs and Note 13 — Asset Retirement Obligations for explanations of changes in estimates.

The initial obligation is measured at its estimated fair value using various judgments and assumptions. Fair value is developed using an expected present value technique that is based on assumptions of market participants and that considers estimated retirement costs in current period dollars that are inflated to the anticipated decommissioning date and then discounted back to the date the ARO was incurred. Changes in assumptions and estimates included within the calculations of the value of the AROs could result in different results than those identified and recorded in the financial statements, including amortization of the regulatory assets.

Nuclear Decommissioning. Decommissioning cost studies are updated for each of TVA's nuclear unit's long-lived assets at least every five years. At September 30, 2023, the estimated future nuclear decommissioning cost recognized in the financial statements was $3.8 billion and was included in AROs, and the unamortized regulatory asset related to nuclear decommissioning ARO costs of $728 million was included in Regulatory assets.

The following key assumptions can have a significant effect on estimates related to the nuclear decommissioning costs reported in TVA's nuclear ARO liability:

Timing and Method – In projecting decommissioning costs, two assumptions must be made to estimate the timing of plant decommissioning. First, the date of the plant's retirement must be estimated. At Browns Ferry and Sequoyah, the estimated retirement date is based on the unit with the longest license period remaining. At Watts Bar, the estimated retirement date is based on each unit's license period. Second, an assumption must be made on the timing of the decommissioning. TVA has ascribed probabilities to two different decommissioning methods related to its nuclear decommissioning obligation estimate: the DECON method and the SAFSTOR method. The DECON method requires that radioactive contamination be removed from a site and safely disposed of or decontaminated to a level that permits the site to be released for unrestricted use shortly after it ceases operation. The SAFSTOR method allows nuclear facilities to be placed and maintained in a condition that allows the

facilities to be safely stored and subsequently decontaminated to levels that permit release for unrestricted use. TVA bases its nuclear decommissioning estimates on site-specific cost studies, which are updated for each of TVA's nuclear units at least every five years. Changes in probabilities ascribed to the assumptions or the timing of decommissioning can significantly change the present value of TVA's obligations.

Cost Estimates – There is limited experience with actual decommissioning of large nuclear facilities. Changes in technology and experience as well as changes in regulations regarding nuclear decommissioning could cause cost estimates to change significantly. TVA's cost studies assume current technology and regulations.

Cost Escalation Rate – TVA uses expected inflation rates over the remaining timeframe until the costs are expected to be incurred to estimate the amount of future cash flows required to satisfy TVA's decommissioning obligations.

Discount Rate – TVA uses its incremental borrowing rate over a period consistent with the remaining timeframe until the costs are expected to be incurred to calculate the present value of the weighted estimated cash flows required to satisfy TVA's decommissioning obligations.

The actual decommissioning costs may vary from the derived estimates because of changes in current assumptions, such as the assumed dates of decommissioning, changes in regulatory requirements, changes in technology, and changes in the cost of labor, materials, and equipment. A 10 percent change in TVA's forecasted costs for nuclear decommissioning activities at September 30, 2023, would have affected the liability by approximately $381 million.

Non-Nuclear Decommissioning. At September 30, 2023, the estimated future non-nuclear decommissioning cost recognized in the financial statements was $3.7 billion and was included in AROs, and the unamortized regulatory asset related

Table of Contents

to non-nuclear decommissioning ARO costs of $2.9 billion was included in Regulatory assets.

This decommissioning cost estimate involves estimating the amount and timing of future expenditures and making judgments concerning whether or not such costs are considered a legal obligation. Estimating the amount and timing of future expenditures includes, among other things, making projections of the timing and duration of the asset retirement process and predicting how costs will escalate with inflation. These costs are predominantly CCR closure, CCR post-closure care and monitoring, and plant powerhouse asbestos removal. CCR closure estimates are primarily closure-in-place except for specific ponds located at Allen and Gallatin, which are closure-by-removal. CCR post-closure care and monitoring primarily includes costs for grounds maintenance, cover system and mechanical maintenance, inspections, and groundwater monitoring costs. Asbestos removal is based on cost per square foot to remove and dispose of asbestos-containing materials. TVA revises estimates of CCR closure on a project by project basis when updated cost information becomes available that causes management's expectation of cost to change materially.

The following key assumptions can have a significant effect on estimates related to the non-nuclear decommissioning costs:

Timing and Method – In projecting non-nuclear decommissioning costs, the date of the asset's retirement must be estimated. In instances where the retirement of a specific asset will precede the retirement of the generating plant, the anticipated retirement date of the specific asset is used. Additionally, TVA expects to incur certain ongoing costs subsequent to the initial asset retirement. TVA develops its cost estimates based on likelihood of decommissioning method where options exist in fulfilling legal obligations (e.g., closure-in-place or closure-by-removal for coal ash impoundments). The decommissioning method is determined based on several factors including available technologies, environmental studies, cost factors, resource availability, and timing requirements. As these factors are considered and decommissioning methods are determined, the detailed project schedules and estimates are adjusted. Non-nuclear decommissioning cost estimates, including CCR post-closure care and monitoring costs and asbestos removal, are studied for revision at least every five years, but revised more frequently if updated cost information becomes available that causes management's expectation of cost to change materially. See Note 10 — Regulatory Assets and Liabilities — Non-Nuclear Decommissioning Costs.

Technology and Regulation – Changes in technology and experience as well as changes in regulations regarding non-nuclear decommissioning could cause cost estimates to change significantly. TVA's cost estimates generally assume current technology and regulations. In April 2015, the EPA published its final rule governing CCR, which regulates landfill and impoundment location, design, and operations; dictates certain pond-closure conditions; and establishes groundwater monitoring and closure and post-closure standards. TVA continues to evaluate the impact of the rule on its operations, including cost and timing estimates of related projects. As a result, further adjustments to its ARO liabilities may be required as estimates are refined.

The actual decommissioning costs may vary from the derived estimates because of changes in current assumptions, such as the assumed dates of decommissioning, changes in the discount or escalation rates, changes in regulatory requirements, changes in technology, and changes in the cost of labor, materials, and equipment. A 10 percent change in TVA's forecasted costs for non-nuclear decommissioning activities at September 30, 2023, would have affected the liability by approximately $368 million.

Fair Value Measurements

Investments. Investment funds are comprised of equity securities and debt securities and are classified as trading. These securities are held in the Nuclear Decommissioning Trust ("NDT"), Asset Retirement Trust ("ART"), Supplemental Executive Retirement Plan ("SERP"), Deferred Compensation Plan ("DCP"), Restoration Plan ("RP"), and qualified benefit pension plan.

Investment Funds. The assets in the NDT, ART, SERP, DCP, and RP are generally measured at fair value based on quoted market prices or other observable market data such as interest rate indices. These investments are primarily U.S. and international equities, real estate investment trusts, fixed income investments, high-yield fixed income investments, U.S. Treasury Inflation-Protected Securities ("TIPS"), treasuries, currencies, derivative instruments, and other investments. TVA has classified all of these trading securities as either Level 1, Level 2, or Investments measured at net asset value ("NAV"). Private equity limited partnerships, private real asset investments, and private credit investments may include holdings of investments in private real estate, venture capital, buyout, mezzanine or subordinated debt, restructuring or distressed debt, and special situations through funds managed by third-party investment managers. These investments are valued at NAV as a practical expedient for fair value. There are no readily available quoted exchange prices for these investments. The fair value of these investments is

Table of Contents

based on information provided by the investment managers. These investments are valued on a quarterly basis. See Note 16 — Fair Value Measurements — Valuation Techniques for a discussion of valuation levels of the investments.

Plan Investments. TVA's qualified benefit pension plan is funded with qualified plan assets. These investments are primarily global public equities, private equities, fixed income securities, public real assets, and private real assets. See Note 20 — Benefit Plans — Fair Value Measurements for disclosure of fair value measurements for investments held by the TVA Retirement System ("TVARS") that support TVA's qualified defined benefit pension plan.

Pricing. Prices provided by third parties for the assets in investment funds and plan investments are subjected to automated tolerance checks by the investment portfolio trustee to identify and avoid, where possible, the use of inaccurate prices. Any such prices identified as outside the tolerance thresholds are reported to the vendor that provided the price. If the prices are validated, the primary pricing source is used. If not, a secondary source price that has passed the applicable tolerance check is used (or queried with the vendor if it is out of tolerance), resulting in either the use of a secondary price, where validated, or the last reported default price, as in the case of a missing price. For monthly valued accounts, where secondary price sources are available, an automated inter-source tolerance report identifies prices with an inter-vendor pricing variance of over two percent at an asset class level. For daily valued accounts, each security is assigned, where possible, an indicative major market index, against which daily price movements are automatically compared. Tolerance thresholds are established by asset class. Prices found to be outside of the applicable tolerance threshold are reported and queried with vendors as described above.

For investment funds, TVA additionally performs its own analytical testing on the change in fair value measurements each period to ensure the valuations are reasonable based on changes in general market assumptions. TVA also performs pricing tests on various portfolios comprised of securities classified in Levels 1 and 2 on a quarterly basis to confirm accuracy of the values received from the investment portfolio trustee. For plan investments, TVARS reviews the trustee's Service Organization Controls report and the pricing policies of the trustee's largest pricing vendor.

Derivatives. TVA has historically entered into various derivative transactions, including commodity option contracts, forward contracts, swaps, swaptions, futures, and options on futures, to manage various market risks. Other than certain derivative instruments included in investment funds, it is TVA's policy to enter into these derivative transactions solely for hedging purposes and not for speculative purposes. See Note 10 — Regulatory Assets and Liabilities and Note 15 — Risk Management Activities and Derivative Transactions for explanations of changes in estimates.

Currency and Interest Rate Derivatives. TVA has two currency swaps and two "fixed for floating" interest rate swaps. The currency swaps protect against changes in cash flows caused by volatility in exchange rates related to outstanding Bonds denominated in British pounds sterling. TVA uses interest rate swaps to fix variable short-term debt to a fixed rate. The currency and interest rate swaps are classified as Level 2 valuations as the rate curves and interest rates affecting the fair value of the contracts are based on observable data.

Commodity Derivatives. TVA enters into commodity contracts for natural gas that require physical delivery of the contracted quantity of the commodity. The natural gas derivative contracts are classified as Level 2 valuations based on market approaches which utilize short-term and mid-term market-quoted prices from an external industry brokerage firm.

TVA maintains policies and procedures to value commodity contracts using what is believed to be the best and most relevant data available. In addition, TVA's risk management group reviews valuations and pricing data.

Commodity Derivatives under the Financial Hedging Program ("FHP"). In 2022, the FHP was reinstated and the TVA Board approved the elimination of the Value at Risk aggregate transaction limit for the FHP and authorized the use of tolerances and measures that will be reviewed annually by the TVA Board. Hedging activity began under the program in the second quarter of 2022. The commodity derivatives under the FHP are classified as Level 2 valuations based on market approaches which utilize short-term and mid-term market-quoted prices from an external industry brokerage firm.

Fair Value Considerations. In determining the fair value of its financial instruments, TVA considers the source of observable market data inputs, liquidity of the instrument, credit risk, and risk of nonperformance of itself or the counterparty to the contract. The conditions and criteria used to assess these factors are described below.

Sources of Market Assumptions. TVA derives its financial instrument market assumptions from market data sources (e.g., Chicago Mercantile Exchange and Moody's Investors Service, Inc. ("Moody's")). In some cases, where market data is not readily available, TVA uses comparable market sources and empirical evidence to derive market assumptions and determine a financial instrument's fair value.

Market Liquidity. Market liquidity is assessed by TVA based on criteria as to whether the financial instrument trades in an active or inactive market. A financial instrument is considered to be in an active market if the prices are fully transparent to the market participants, the prices can be measured by market bid and ask quotes, the market has a relatively high trading volume, and the market has a significant number of market participants that will allow the market to rapidly absorb the quantity of the assets traded without significantly affecting the market price. Other factors TVA considers when determining whether a

Table of Contents

market is active or inactive include the presence of government or regulatory control over pricing that could make it difficult to establish a market-based price upon entering into a transaction.

Nonperformance Risk. In determining the potential impact of nonperformance risk, which includes credit risk, TVA considers changes in current market conditions, readily available information on nonperformance risk, letters of credit, collateral, other arrangements available, and the nature of master netting arrangements. TVA is a counterparty to derivative instruments that subject TVA to nonperformance risk. Nonperformance risk on the majority of investments and certain exchange-traded instruments held by TVA is incorporated into the exit price that is derived from quoted market data that is used to value the investment.

adjustment ("CVA"). TVA determines an appropriate CVA for each applicable financial instrument based on the term of the instrument and TVA's or the counterparty's credit rating as obtained from Moody's. For companies that do not have an observable credit rating, TVA uses internal analysis to assign a comparable rating to the company. TVA discounts each financial instrument using the historical default rate (as reported by Moody's for CY 1983 to CY 2022) for companies with a similar credit rating over a time period consistent with the remaining term of the contract.

All derivative instruments are analyzed individually and are subject to unique risk exposures. The application of CVAs resulted in a $1 million decrease in the fair value of assets and a $1 million decrease in the fair value of liabilities at September 30, 2023.

Pension and Other Post-Retirement Benefits

TVA sponsors a defined benefit pension plan that is qualified under section 401(a) of the Internal Revenue Code and covers substantially all of its full-time annual employees hired prior to July 1, 2014. TVARS, a separate legal entity governed by its own board of directors (the "TVARS Board"), administers the qualified defined benefit pension plan. TVA also provides a SERP to certain executives in critical positions, which provides supplemental pension benefits tied to compensation levels that exceed limits imposed by IRS rules applicable to the qualified defined benefit pension plan. Additionally, TVA provides post-retirement health care benefits for most of its full-time employees who reach retirement age while still working for TVA.

TVA's pension and other post-retirement benefits contain uncertainties because they require management to make certain assumptions related to TVA's cost to provide these benefits. Numerous factors are considered including the provisions of the plans, changing employee demographics, various actuarial calculations, assumptions, and accounting mechanisms. Lingering effects of the COVID-19 pandemic, supply-chain disruptions, inflation, and geopolitical tensions on the financial markets, regulations, and experience are uncertain and still evolving, creating an additional degree of complexity associated with the future occurrence or outcome of events and conditions underlying the significant accounting assumptions discussed below.

Certain key actuarial assumptions critical to the pension and postretirement accounting estimates include expected long-term rate of return on plan assets, discount rates, projected health care cost trend rates, cost of living adjustments ("COLA"), and mortality rates. Every five years, a formal actuarial experience study that compares assumptions to the actual experience is conducted. Additional ad-hoc experience studies are performed as needed to review recent experience and validate recommended changes to the actuarial assumptions used based upon TVA's latest experience study in 2023. See Note 20 — Benefit Plans for explanations of changes in assumptions and estimates.

Expected Return on Plan Assets. The qualified defined benefit pension plan is the only plan that is funded with qualified plan assets. In determining the expected long-term rate of return on pension plan assets, TVA uses a process that incorporates actual historical asset class returns and an assessment of expected future performance and takes into consideration external actuarial advice, the current outlook on capital markets, the asset allocation policy, and the anticipated impact of active management. In September 2023, the TVARS Board approved a new asset allocation policy, but had no changes to the 6.50 percent expected return on assets assumption adopted in 2022.

TVA recognizes the impact of asset performance on pension expense over a three-year phase-in period through a market-related value of assets ("MRVA") calculation. The MRVA recognizes investment gains and losses over a three-year period and is used in calculating the expected return on assets and the recognized net actuarial loss components of pension net periodic benefit cost.

A higher expected rate of return assumption decreases the net periodic pension benefit costs, whereas a lower expected rate of return assumption increases the net periodic pension benefit cost. The plan's actual rate of return for 2023 was 6.13 percent compared to the assumption of 6.50 percent. The difference between the expected and actual return on plan

Table of Contents

assets resulted in an actuarial loss of $9 million that is recognized as an increase in the related regulatory asset and an increase in the pension benefit obligation at September 30, 2023.

Discount Rate. TVA's discount rates are derived by identifying a theoretical settlement portfolio of high quality corporate bonds of Aa quality or higher sufficient to provide for the projected benefit payments. The model matches the present value of the projected benefit payments to the market value of the theoretical settlement bond portfolio with any resulting excess funds presumed to be reinvested and used to meet successive year benefit payments. A single equivalent discount rate is determined to align the present value of the required cash flow with the value of the bond portfolio. The resulting discount rates are reflective of both the current interest rate and the distinct liability of the pension and post-retirement benefit plans.

The discount rate is somewhat volatile because it is determined based upon the prevailing rate of long-term corporate bonds as of the measurement date. A higher discount rate decreases the plan obligations and correspondingly decreases the net periodic pension and net post-retirement benefit costs for those plans where actuarial losses are being amortized. Alternatively, a lower discount rate increases net periodic pension and net periodic post-retirement benefit costs. The discount rates used to determine the pension and post-retirement benefit obligations were 5.95 percent and 6.05 percent, respectively, at September 30, 2023.

Health Care Cost Trends. In establishing health care cost trend rates for the post-retirement obligation, TVA reviews actual recent cost trends and projected future trends considering health care inflation, changes in health care utilization, and changes in plan benefits and premium experience. The pre-Medicare eligible per capita claims costs trend rate is 7.50 percent, declining 0.25 percent per year until it reaches the ultimate trend rate of 5.00 percent in 2034. The pre-Medicare eligible per capita contributions trend rate and ultimate rate is 5.00 percent. The post-Medicare current health care cost trend rate is zero percent for years 2023 through 2025, reaching the ultimate rate of 4.00 percent in 2026. During 2023, TVA recognized a $27 million actuarial loss to reflect observed and anticipated plan experience for contribution costs and pre-Medicare per capita claims costs and a $17 million actuarial loss due to changes in the pre-Medicare per capita claims cost trend rate assumptions.

Cost of Living Adjustments. Cost of living adjustments ("COLAs") are an increase in the benefits for eligible retirees to help maintain the purchasing power of benefits as consumer prices increase. This assumption is based on the long-term expected future rate of inflation, which is based on the capital market outlooks, economic forecasts, and the Federal Reserve policy. See Note 20 — Benefit Plans — Plan Assumptions — Cost of Living Adjustment for further discussion on the calculation of the COLA. The actual COLA for CY 2023 was 6.00 percent. The CY 2024 COLA is assumed to be 4.05 percent, and for years thereafter the COLA is assumed to be 2.00 percent. A higher COLA increases the pension benefit obligation whereas a lower COLA assumption decreases the obligation. The actual calendar year COLA and the long-term COLA assumption are used to determine the benefit obligation at September 30 and the net periodic benefit costs for the following fiscal year.

Mortality. TVA's mortality assumptions are based upon actuarial projections in combination with actuarial studies of the actual mortality experience of TVARS's pension and post-retirement benefit plan participants taking into consideration the Society of Actuaries ("SOA") mortality table and projection scales as of September 30, 2023. TVA continues to monitor the availability of updates to mortality tables, longevity improvement scales, and mortality reviews and experience studies to consider whether these updates should be reflected in the current year mortality assumption.

The following tables illustrate the estimated effects of changing certain of the critical actuarial assumptions discussed above, while holding all other assumptions constant and excluding any impact for unamortized actuarial gains and losses:


Sensitivity to Certain Changes in Pension Assumptions
Actuarial Assumption	Actual Assumption		Change in Assumption		Impact
Effect on 2023 pension expense:
Discount rate	5.60	%	(0.25)	%	$	12
Expected return on assets	6.50	%	(0.25)	%	19
COLA	2.00	%	0.25	%	24

Effect on benefit obligation at September 30, 2023:
Discount rate	5.95	%	(0.25)	%	$	236
COLA	2.00	%	0.25	%	165


Sensitivity to Changes in Assumed Health Care Cost Trend Rates
	1% Increase		1% Decrease
Effect on total of service and interest cost components for 2023	$	5	$	(3)
Effect on end-of-year accumulated post-retirement benefit obligation at September 30, 2023	52		(48)

Table of Contents

New Accounting Standards and Interpretations

See Note 2 — Impact of New Accounting Standards and Interpretations for a discussion of recent accounting standards and pronouncements that were issued by the Financial Accounting Standards Board ("FASB"), became effective for TVA, or were adopted by TVA during the presented periods.

Legislative and Regulatory Matters

For additional discussion on legislative and regulatory matters, including a discussion of environmental legislation and regulation, see Part I, Item 1, Business — Environmental Matters, Part I, Item 1, Business — Regulation, and Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Key Initiatives and Challenges.

TVA does not engage, and does not control any entity that is engaged, in any activity listed under Section 13(r) of the Securities Exchange Act of 1934 (the "Exchange Act"), which requires certain issuers to disclose certain activities relating to Iran involving the issuer and its affiliates. Based on information supplied by each such person, none of TVA's directors and executive officers are involved in any such activities. While TVA is an agency and instrumentality of the U.S., TVA does not believe its disclosure obligations, if any, under Section 13(r) extend to the activities of any other departments, divisions, or agencies of the U.S.

Environmental Matters

See Part I, Item 1, Business — Environmental Matters, which discussion is incorporated by reference into this Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations.

Legal Proceedings

From time to time, TVA is party to or otherwise involved in lawsuits, claims, proceedings, investigations, and other legal matters ("Legal Proceedings") that have arisen in the ordinary course of conducting its activities, as a result of catastrophic events or otherwise. As of September 30, 2023, TVA had accrued approximately $28 million with respect to Legal Proceedings. No assurance can be given that TVA will not be subject to significant additional claims and liabilities. If actual liabilities significantly exceed the estimates made, TVA's results of operations, liquidity, and financial condition could be materially adversely affected.

For a discussion of certain current material Legal Proceedings, see Note 22 — Commitments and Contingencies — Legal Proceedings, which discussions are incorporated into this Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations.

Risk Management Activities

TVA is exposed to various market risks. These market risks include risks related to commodity prices, investment prices, interest rates, currency exchange rates, inflation, and counterparty credit and performance risk. To help manage certain of these risks, TVA has entered into various derivative transactions, including commodity option contracts, forward contracts, swaps, swaptions, futures, and options on futures. Other than certain derivative instruments in its trust investment funds, it is TVA's policy to enter into these derivative transactions solely for hedging purposes and not for speculative purposes. See Note 15 — Risk Management Activities and Derivative Transactions.

Risk Governance

The Enterprise Risk Council ("ERC") is responsible for the highest level of risk oversight at TVA and is also responsible for communicating enterprise-wide risks with policy implications to the TVA Board or a designated TVA Board committee. The ERC is comprised of the Enterprise Leadership Team ("ELT") and the Chief Risk Officer ("CRO") who acts as Chair. ERC members may invite additional attendees to meetings as non-voting participants. The ERC has also established subordinate committees, consisting of business unit leaders, to assist in the oversight of fuel and power procurement, DER programs and products, and general risk management.

TVA has a designated Enterprise Risk Management ("ERM") organization within its Financial Services organization responsible for (1) establishing enterprise risk management policies and guidelines, (2) developing an enterprise risk profile aligned with TVA's strategic objectives, (3) performing annual risk assessments across all TVA business units, (4) monitoring and reporting on identified enterprise risks and emerging risks, (5) facilitating enterprise risk discussions with the risk subject matter experts across the organization and at the ERC and TVA Board levels, and (6) developing and improving TVA's risk awareness culture. TVA has cataloged major short-term and long-term enterprise level risks across the organization. A discussion of significant risks is presented in Part I, Item 1A, Risk Factors.

Table of Contents

Commodity Price Risk

TVA is exposed to effects of market fluctuations in the price of commodities that are critical to its operations, including electricity, coal, and natural gas. The magnitude of exposure to these risks is influenced by many factors including contract terms and market liquidity. TVA's commodity price risk is substantially mitigated by its cost-based rates, including its total fuel cost adjustment, and long-term fixed price commodity contracts.

Commodity Derivatives. TVA manages risk with commodity contracts for natural gas that require physical delivery of the contracted quantity. An immediate 10 percent decline in the market price of natural gas on September 30, 2023 and 2022, would have resulted in decreases of approximately $1 million and $18 million, respectively, in the fair value of TVA's natural gas derivative instruments at these dates.

Commodity Derivatives under the FHP. TVA manages risk with commodity derivatives under the FHP by hedging exposure to the price of natural gas. An immediate 10 percent decline in the market price of natural gas on September 30, 2023 and 2022, would have resulted in a decrease of approximately $127 million and $133 million, respectively, in the fair value of TVA's natural gas derivative instruments under the FHP.

Investment Price Risk

TVA's investment price risk relates primarily to investments in TVA's NDT, ART, pension fund, SERP, DCP, and RP.

Nuclear Decommissioning Trust. The NDT is generally designed to achieve a return in line with overall equity and debt market performance. The assets of the trust are invested in debt and equity securities, private partnerships, and certain derivative instruments including forwards, futures, options, and swaps, and through these investments the trust has exposure to U.S. equities, international equities, real estate investment trusts, natural resource equities, high-yield debt, domestic debt, U.S. TIPS, treasuries, private real assets, private equity, and private credit strategies. At September 30, 2023 and 2022, an immediate 10 percent decrease in the price of the investments in the trust would have reduced the value of the trust by $279 million and $252 million, respectively.

Asset Retirement Trust. The ART is presently invested to achieve a return in line with overall equity and debt market performance. The assets of the trust are invested in debt and equity securities, private partnerships, and certain derivative instruments including options, and through these investments the trust has exposure to U.S. equities, real estate investment trusts, natural resource equities, high-yield debt, domestic debt, TIPS, treasuries, private real assets, private equity, and private credit strategies. At September 30, 2023 and 2022, an immediate 10 percent decrease in the price of the investments in the trust would have reduced the value of the trust by $124 million and $106 million, respectively.

Qualified Pension Plan. In 2021, a new asset allocation policy was put in place to reduce risk and volatility in the TVARS investment portfolio. Furthermore, in September 2023, based on current market conditions and updated capital market assumptions, the asset allocation policy was modified to further progress towards these goals. TVARS investments will be reallocated in a prudent manner over time to move toward the new asset allocation targets. The TVARS asset allocation policy for qualified pension plan assets has targets of 17 percent growth assets, 30 percent defensive growth assets, 33 percent defensive assets, and 20 percent inflation-sensitive assets. Pursuant to the TVARS Rules and Regulations, any proposed changes in asset allocation that would change TVARS's assumed rate of investment return are subject to the review and veto of the TVA Board.

As set forth above, the qualified pension plan assets are invested across growth assets, defensive growth assets, defensive assets, and inflation-sensitive assets. The TVARS asset allocation policy includes permissible deviations from target allocations, and action can be taken, as appropriate, to rebalance the plan's assets consistent with the asset allocation policy. At September 30, 2023 and 2022, an immediate 10 percent decrease in the value of the net assets of the fund would have reduced the value of the fund by approximately $813 million and $809 million, respectively.

Supplemental Executive Retirement Plan. The SERP is a non-qualified defined benefit pension plan similar to those typically found in other companies in TVA's peer group and is provided to selected employees of TVA. TVA's SERP was created to recruit and retain key executives. The plan is designed to provide a competitive level of retirement benefits in excess of the limitations on contributions and benefits imposed by TVA's qualified defined benefit plan and Internal Revenue Code Section 415 limits on qualified retirement plans. The SERP currently targets an asset allocation policy for its plan assets of 64 percent equity securities, which includes U.S. and non-U.S. equities, and 36 percent fixed income securities. The SERP plan assets are presently invested to achieve a return in line with overall equity and debt market performance. At September 30, 2023 and 2022, an immediate 10 percent decrease in the value of the SERP investments would have reduced the value of the investments by $8 million and $7 million, respectively.

Deferred Compensation Plan. The DCP is designed to provide participants with the ability to defer compensation to future periods. The plan assists in the recruitment of top executive talent for TVA. As in other corporations, deferred compensation can be an integral part of a total compensation package. Assets currently include deferral balances. The default return on investment of the accounts is interest calculated based on the composite rate of all marketable U.S. Treasury issues.

Table of Contents

Executives may alternatively choose to have their balances adjusted based on the return of certain mutual funds. At both September 30, 2023 and 2022, an immediate 10 percent decrease in the value of the deferred compensation accounts would have reduced the value of the accounts by $2 million.

Restoration Plan. The RP is a non-qualified excess 401(k) plan designed to allow certain eligible employees whose contributions to the 401(k) plan are limited by IRS rules to save additional amounts for retirement and receive non-elective and matching employer contributions. The plan is designed to provide a competitive level of retirement benefits and assist in the recruitment of executive talent for TVA. The default return on investment of the accounts is interest calculated based on the composite rate of all marketable U.S. Treasury issues. Executives may alternatively choose to have their balances adjusted based on the return of certain mutual funds. At September 30, 2023, an immediate 10 percent decrease in the value of the RP accounts would have reduced the value of the accounts by less than $1 million.

Interest Rate Risk

TVA's interest rate risk is related primarily to its short-term investments, short-term debt, long-term debt, and interest rate derivatives.

Investments. At September 30, 2023, TVA had $501 million of cash and cash equivalents, and the average balance of cash and cash equivalents for 2023 was $544 million. The average interest rate that TVA received on its short-term investments during 2023 was 4.65 percent. If the rates of interest that TVA received on its short-term investments during 2023 were 3.65 percent, TVA would have received $5 million less in interest from its short-term investments. At September 30, 2022, TVA had $500 million of cash and cash equivalents, and the average balance of cash and cash equivalents for 2022 was $675 million. The average interest rate that TVA received on its short-term investments during 2022 was slightly less than one percent. If the rates that TVA received on its short-term investments during 2022 were exactly zero percent, TVA would have received approximately $4 million less in interest from its short-term investments. In addition to affecting the amount of interest that TVA receives from its short-term investments, changes in interest rates could affect the value of the investments in its NDT, ART, pension plan, SERP, DCP, and RP. See Risk Management Activities — Investment Price Risk above.

Short-Term Debt. At September 30, 2023, TVA's short-term borrowings were $432 million, and the current maturities of power bonds and debt of variable interest entities were $1.1 billion. Based on TVA's interest rate exposure at September 30, 2023, an immediate one percentage point increase in interest rates would have resulted in an increase of $15 million in TVA's short-term interest expense. At September 30, 2022, TVA's short-term borrowings were $1.2 billion, and the current maturities of long-term debt were $68 million. Based on TVA's interest rate exposure at September 30, 2022, an immediate one percentage point increase in interest rates would have resulted in an increase of $12 million in TVA's short-term interest expense.

Long-Term Debt. At September 30, 2023 and 2022, the interest rates on all of TVA's outstanding long-term debt were fixed (or subject only to downward adjustment under certain conditions). Accordingly, an immediate one percentage point increase in interest rates would not have affected TVA's interest expense associated with its long-term debt. When TVA's long-term debt matures or is redeemed, however, TVA typically refinances debt in whole or in part by issuing additional debt. Accordingly, if interest rates are high when TVA issues this additional debt, TVA's cash flows, results of operations, and financial condition may be adversely affected. This risk is somewhat mitigated by the fact that TVA's debt portfolio is diversified in terms of maturities and has a long average life. At September 30, 2023 and 2022, the average life of TVA's debt portfolio was 14.43 years and 15.96 years, respectively. At September 30, 2023 and 2022, the average interest rate of TVA's debt portfolio was 4.61 percent and 4.65 percent, respectively. See Note 14 — Debt and Other Obligations — Debt Outstanding for a schedule of TVA's debt maturities.

Interest Rate Derivatives. Changes in interest rates also affect the mark-to-market ("MtM") valuation of TVA's interest rate derivatives. See Note 15 — Risk Management Activities and Derivative Transactions — Derivatives Not Receiving Hedge Accounting Treatment — Interest Rate Derivatives. TVA had two interest rate swaps outstanding at both September 30, 2023 and 2022. Net unrealized gains and losses on the remaining instruments are reflected on TVA's Consolidated Balance Sheets in a regulatory liability or asset account, and realized gains and losses are reflected in earnings. Based on TVA's interest rate exposure at September 30, 2023, an immediate one percentage point decrease in interest rates would have increased the interest rate swap liabilities by $272 million. Based on TVA's interest rate exposure at September 30, 2022, an immediate one-half percentage point decrease in interest rates would have increased the interest rate swap liabilities by $122 million.

Currency Exchange Rate Risk

Over the next several years, TVA plans to spend a significant amount of capital on clean air projects, capacity expansion, and other projects. A portion of this amount may be spent on contracts that are denominated in one or more foreign currencies. Additionally, TVA's two issues of Bonds denominated in British pounds sterling are hedged by currency swap agreements. If not effectively managed, foreign currency exposure could negatively impact TVA's counterparty risk, cash flows, results of operations, and financial condition.

Table of Contents

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Quantitative and qualitative disclosures about market risk are reported in Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Risk Management Activities, which discussion is incorporated by reference into this Item 7A, Quantitative and Qualitative Disclosures About Market Risk.

Table of Contents

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

TENNESSEE VALLEY AUTHORITY

CONSOLIDATED BALANCE SHEETS

At September 30

(in millions)


ASSETS
	2023		2022
Current assets
Cash and cash equivalents	$	501	$	500

Accounts receivable, net	1,745		2,007
Inventories, net	1,108		1,072
Regulatory assets	178		138
Other current assets	134		257
Total current assets	3,666		3,974

Property, plant, and equipment
Completed plant	68,199		66,442
Less accumulated depreciation	(35,871)		(34,239)
Net completed plant	32,328		32,203
Construction in progress	3,238		2,535
Nuclear fuel	1,344		1,492
Finance leases	572		630
Total property, plant, and equipment, net	37,482		36,860

Investment funds	4,123		3,671

Regulatory and other long-term assets
Regulatory assets	5,566		6,134
Operating lease assets, net of amortization	177		155
Other long-term assets	330		394
Total regulatory and other long-term assets	6,073		6,683

Total assets	$	51,344	$	51,188
The accompanying notes are an integral part of these consolidated financial statements.

Table of Contents

TENNESSEE VALLEY AUTHORITY

CONSOLIDATED BALANCE SHEETS

At September 30

(in millions)


LIABILITIES AND PROPRIETARY CAPITAL
	2023		2022
Current liabilities
Accounts payable and accrued liabilities	$	2,618	$	2,466

Accrued interest	272		273
Asset retirement obligations	272		275


Regulatory liabilities	222		391
Short-term debt, net	432		1,172
Current maturities of power bonds	1,022		29
Current maturities of long-term debt of variable interest entities	35		39

Total current liabilities	4,873		4,645

Other liabilities
Post-retirement and post-employment benefit obligations	2,527		3,072
Asset retirement obligations	7,217		6,887
Finance lease liabilities	576		628
Other long-term liabilities	1,211		1,485

Regulatory liabilities	107		172
Total other liabilities	11,638		12,244

Long-term debt, net
Long-term power bonds, net	17,844		17,826
Long-term debt of variable interest entities, net	933		968

Total long-term debt, net	18,777		18,794

Total liabilities	35,288		35,683

Commitments and contingencies (Note 22)

Proprietary capital
Power program appropriation investment	258		258
Power program retained earnings	15,302		14,800
Total power program proprietary capital	15,560		15,058
Nonpower programs appropriation investment, net	525		533
Accumulated other comprehensive loss	(29)		(86)
Total proprietary capital	16,056		15,505

Total liabilities and proprietary capital	$	51,344	$	51,188
The accompanying notes are an integral part of these consolidated financial statements.

Table of Contents

TENNESSEE VALLEY AUTHORITY

CONSOLIDATED STATEMENTS OF OPERATIONS

For the years ended September 30

(in millions)


	2023		2022		2021
Operating revenues
Revenue from sales of electricity	$	11,899	$	12,371	$	10,357
Other revenue	155		169		146
Total operating revenues	12,054		12,540		10,503
Operating expenses
Fuel	2,549		2,567		1,737
Purchased power	1,633		1,921		984
Operating and maintenance	3,372		2,986		2,890
Depreciation and amortization	2,213		2,054		1,533
Tax equivalents	593		601		514
Total operating expenses	10,360		10,129		7,658
Operating income	1,694		2,411		2,845
Other income, net	61		7		13
Other net periodic benefit cost	199		258		258
Interest expense
Interest expense	1,056		1,052		1,088


Net income	$	500	$	1,108	$	1,512
The accompanying notes are an integral part of these consolidated financial statements.

Table of Contents

TENNESSEE VALLEY AUTHORITY

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

For the years ended September 30

(in millions)


	2023		2022		2021
Net income	$	500	$	1,108	$	1,512
Other comprehensive income (loss)
Net unrealized gain (loss) on cash flow hedges	99		(157)		126
Net unrealized (gain) loss reclassified to earnings from cash flow hedges	(42)		93		(97)
Total other comprehensive income (loss)	57		(64)		29
Total comprehensive income	$	557	$	1,044	$	1,541
The accompanying notes are an integral part of these consolidated financial statements.

Table of Contents

TENNESSEE VALLEY AUTHORITY

CONSOLIDATED STATEMENTS OF CASH FLOWS

For the years ended September 30

(in millions)


	2023		2022		2021
Cash flows from operating activities
Net income	$	500	$	1,108	$	1,512
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization(1)	2,235		2,076		1,555
Amortization of nuclear fuel cost	371		347		383
Non-cash retirement benefit expense	241		328		333



Other regulatory amortization and deferrals	31		70		(72)
Changes in current assets and liabilities
Accounts receivable, net	301		(412)		(18)
Inventories and other current assets, net	(83)		(163)		42
Accounts payable and accrued liabilities	(1)		282		178
Accrued interest	(1)		(7)		(18)

Pension contributions	(306)		(308)		(306)

Settlements of asset retirement obligations	(327)		(291)		(242)
Other, net	(89)		(82)		(91)
Net cash provided by operating activities	2,872		2,948		3,256

Cash flows from investing activities
Construction expenditures	(2,526)		(2,361)		(1,963)

Nuclear fuel expenditures	(273)		(283)		(354)
Acquisition of leasehold interests in combustion turbine assets	(155)		—		—
Purchases of investments	(51)		(51)		(50)
Loans and other receivables
Advances	(7)		(9)		(7)
Repayments	8		15		9
Other, net	10		26		27
Net cash used in investing activities	(2,994)		(2,663)		(2,338)

Cash flows from financing activities
Long-term debt
Issues of power bonds	992		484		500

Redemptions and repurchases of power bonds	(29)		(1,028)		(1,860)
Payments on debt of variable interest entities	(39)		(43)		(41)

Short-term debt issues (redemptions), net	(740)		392		723
Payments on leases and leasebacks	(56)		(85)		(250)

Financing costs, net	(4)		(3)		(2)


Other, net	(1)		—		9
Net cash provided by (used in) financing activities	123		(283)		(921)
Net change in cash, cash equivalents, and restricted cash	1		2		(3)
Cash, cash equivalents, and restricted cash at beginning of year	520		518		521
Cash, cash equivalents, and restricted cash at end of year	$	521	$	520	$	518
Note (1) Including amortization of debt issuance costs and premiums/discounts.
The accompanying notes are an integral part of these consolidated financial statements.

Table of Contents

TENNESSEE VALLEY AUTHORITY

CONSOLIDATED STATEMENTS OF CHANGES IN PROPRIETARY CAPITAL

For the years ended September 30

(in millions)


	Power Program Appropriation Investment		Power Program Retained Earnings		Nonpower Programs Appropriation Investment, Net		Accumulated Other Comprehensive Loss		Total
Balance at September 30, 2020	$	258	$	12,177	$	548	$	(51)	$	12,932
Net income (loss)	—		1,520		(8)		—		1,512
Total other comprehensive income (loss)	—		—		—		29		29
Return on power program appropriation investment	—		(4)		—		—		(4)
Implementation of Financial Instruments - Credit Losses Standard	—		(4)		—		—		(4)
Balance at September 30, 2021	$	258	$	13,689	$	540	$	(22)	$	14,465
Net income (loss)	—		1,115		(7)		—		1,108
Total other comprehensive income (loss)	—		—		—		(64)		(64)
Return on power program appropriation investment	—		(4)		—		—		(4)
Balance at September 30, 2022	$	258	$	14,800	$	533	$	(86)	$	15,505
Net income (loss)	—		508		(8)		—		500
Total other comprehensive income (loss)	—		—		—		57		57
Return on power program appropriation investment	—		(6)		—		—		(6)

Balance at September 30, 2023	$	258	$	15,302	$	525	$	(29)	$	16,056
The accompanying notes are an integral part of these consolidated financial statements.

Table of Contents

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Dollars in millions except where noted)


Note		Page No.
1	Summary of Significant Accounting Policies	100
2	Impact of New Accounting Standards and Interpretations	106
3	Accounts Receivable, Net	106
4	Inventories, Net	106
5	Other Current Assets	107
6	Net Completed Plant	107
7	Plant Closures	108
8	Leases	108
9	Other Long-Term Assets	111
10	Regulatory Assets and Liabilities	112
11	Variable Interest Entities	114
12	Other Long-Term Liabilities	117
13	Asset Retirement Obligations	118
14	Debt and Other Obligations	119
15	Risk Management Activities and Derivative Transactions	123
16	Fair Value Measurements	129
17	Revenue	135
18	Other Income, Net	137
19	Supplemental Cash Flow Information	137
20	Benefit Plans	138
21	Collaborative Arrangement	151
22	Commitments and Contingencies	151
23	Related Parties	155

1. Summary of Significant Accounting Policies

General

The Tennessee Valley Authority ("TVA") is a corporate agency and instrumentality of the United States ("U.S.") that was created in 1933 by federal legislation in response to a proposal by President Franklin D. Roosevelt. TVA was created to, among other things, improve navigation on the Tennessee River, reduce the damage from destructive flood waters within the Tennessee River system and downstream on the lower Ohio and Mississippi Rivers, further the economic development of TVA's service area in the southeastern U.S., and sell the electricity generated at the facilities TVA operates. Today, TVA operates the nation's largest public power system and supplies power in most of Tennessee, northern Alabama, northeastern Mississippi, and southwestern Kentucky and in portions of northern Georgia, western North Carolina, and southwestern Virginia to a population of approximately 10 million people.

The power program has historically been separate and distinct from the stewardship programs. It is required to be self-supporting from power revenues and proceeds from power financings, such as proceeds from the issuance of bonds, notes, or other evidences of indebtedness (collectively, "Bonds"). Although TVA does not currently receive Congressional appropriations, it is required to make annual payments to the United States Department of the Treasury ("U.S. Treasury") as a return on the government's appropriation investment in TVA's power facilities (the "Power Program Appropriation Investment"). In the 1998 Energy and Water Development Appropriations Act, Congress directed TVA to fund essential stewardship activities related to its management of the Tennessee River system and nonpower or stewardship properties with power revenues in the event that there were insufficient appropriations or other available funds to pay for such activities in any fiscal year. Congress has not

100

Table of Contents

provided any appropriations to TVA to fund such activities since 1999. Consequently, during 2000, TVA began paying for essential stewardship activities primarily with power revenues, with the remainder funded with user fees and other forms of revenues derived in connection with those activities. The activities related to stewardship properties do not meet the criteria of an operating segment under accounting principles generally accepted in the United States of America ("GAAP"). Accordingly, these assets and properties are included as part of the power program, TVA's only operating segment.

Power rates are established by the TVA Board as authorized by the Tennessee Valley Authority Act of 1933, as amended ("TVA Act"). The TVA Act requires TVA to charge rates for power that will produce gross revenues sufficient to provide funds for operation, maintenance, and administration of its power system; payments to states and counties in lieu of taxes ("tax equivalents"); debt service on outstanding indebtedness; payments to the U.S. Treasury in repayment of and as a return on the Power Program Appropriation Investment; and such additional margin as the TVA Board may consider desirable for investment in power system assets, retirement of outstanding Bonds in advance of maturity, additional reduction of the Power Program Appropriation Investment, and other purposes connected with TVA's power business. TVA fulfilled its requirement to repay $1.0 billion of the Power Program Appropriation Investment with the 2014 payment; therefore, this repayment obligation is no longer a component of rate setting. In setting TVA's rates, the TVA Board is charged by the TVA Act to have due regard for the primary objectives of the TVA Act, including the objective that power shall be sold at rates as low as are feasible. Rates set by the TVA Board are not subject to review or approval by any state or other federal regulatory body.

Fiscal Year

TVA's fiscal year ends September 30. Years (2023, 2022, etc.) refer to TVA's fiscal years unless they are preceded by "CY," in which case the references are to calendar years.

Cost-Based Regulation

Since the TVA Board is authorized by the TVA Act to set rates for power sold to its customers, TVA is self-regulated. Additionally, TVA's regulated rates are designed to recover its costs. Based on current projections, TVA believes that rates, set at levels that will recover TVA's costs, can be charged and collected. As a result of these factors, TVA records certain assets and liabilities that result from the regulated ratemaking process that would not be recorded under GAAP for non-regulated entities. Regulatory assets generally represent incurred costs that have been deferred because such costs are probable of future recovery in customer rates. Regulatory liabilities generally represent obligations to make refunds to customers for previous collections for costs that are not likely to be incurred or deferral of gains that will be credited to customers in future periods. TVA assesses whether the regulatory assets are probable of future recovery by considering factors such as applicable regulatory changes, potential legislation, and changes in technology. Based on these assessments, TVA believes the existing regulatory assets are probable of recovery. This determination reflects the current regulatory and political environment and is subject to change in the future. If future recovery of regulatory assets ceases to be probable, or TVA is no longer considered to be a regulated entity, then costs would be required to be written off. All regulatory asset write offs would be required to be recognized in earnings in the period in which future recovery ceases to be probable.

Basis of Presentation

The accompanying consolidated financial statements, which have been prepared in accordance with GAAP, include the accounts of TVA and variable interest entities ("VIEs") of which TVA is the primary beneficiary. See Note 11 — Variable Interest Entities. Intercompany balances and transactions have been eliminated in consolidation.

Use of Estimates

The preparation of financial statements requires TVA to estimate the effects of various matters that are inherently uncertain as of the date of the consolidated financial statements. Although the consolidated financial statements are prepared in conformity with GAAP, TVA is required to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities, and the amounts of revenues and expenses, reported during the reporting period. Each of these estimates varies in regard to the level of judgment involved and its potential impact on TVA's financial results. Estimates are considered critical either when a different estimate could have reasonably been used, or where changes in the estimate are reasonably likely to occur from period to period, and such use or change would materially impact TVA's financial condition, results of operations, or cash flows.

Cash, Cash Equivalents, and Restricted Cash

Cash includes cash on hand, non-interest bearing cash, and deposit accounts. All highly liquid investments with original maturities of three months or less are considered cash equivalents. Cash and cash equivalents that are restricted, as to withdrawal or use under the terms of certain contractual agreements, are recorded in Other long-term assets on the Consolidated Balance Sheets. Restricted cash and cash equivalents include cash held in trusts that are currently restricted for TVA economic development loans and for certain TVA environmental programs in accordance with agreements related to compliance with certain environmental regulations. See Note 22 — Commitments and Contingencies — Legal Proceedings — Environmental Agreements.

101

Table of Contents

The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported on the Consolidated Balance Sheets and Consolidated Statements of Cash Flows:


Cash, Cash Equivalents, and Restricted Cash At September 30 (in millions)
	2023		2022
Cash and cash equivalents	$	501	$	500
Restricted cash and cash equivalents included in Other long-term assets	20		20
Total cash, cash equivalents, and restricted cash	$	521	$	520

Allowance for Uncollectible Accounts

TVA recognizes an allowance that reflects the current estimate for credit losses expected to be incurred over the life of the financial assets based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amounts. The appropriateness of the allowance is evaluated at the end of each reporting period.

To determine the allowance for trade receivables, TVA considers historical experience and other currently available information, including events such as customer bankruptcy and/or a customer failing to fulfill payment arrangements by the due date. TVA's corporate credit department also performs an assessment of the financial condition of customers and the credit quality of the receivables. In addition, TVA reviews other reasonable and supportable forecasts to determine if the allowance for uncollectible amounts should be further adjusted in accordance with the accounting guidance for Current Expected Credit Losses.

To determine the allowance for loans receivables, TVA aggregates loans into the appropriate pools based on the existence of similar risk characteristics such as collateral types and internal assessed credit risks. In situations where a loan exhibits unique risk characteristics and is no longer expected to experience similar risks to the rest of its pool, the loan will be evaluated separately. TVA derives an annual loss rate based on historical loss and then adjusts the rate to reflect TVA's consideration of available information on current conditions and reasonable and supportable future forecasts. This information may include economic and business conditions, default trends, and other internal and external factors. For periods beyond the reasonable and supportable forecast period, TVA uses the current calculated long-term average historical loss rate for the remaining life of the loan portfolio.

The allowance for uncollectible accounts was less than $1 million at both September 30, 2023 and 2022, for trade accounts receivable. Additionally, loans receivable of $104 million and $105 million at September 30, 2023 and 2022, respectively, are included in Accounts receivable, net and Other long-term assets, for the current and long-term portions, respectively. Loans receivables are reported net of allowances for uncollectible accounts of $3 million at both September 30, 2023 and 2022.

Revenues

TVA recognizes revenue from contracts with customers to depict the transfer of goods or services to customers in an amount to which the entity expects to be entitled in exchange for those goods or services. For the generation and transmission of electricity, this is generally at the time the power is delivered to a metered customer delivery point for the customer's consumption or distribution. As a result, revenues from power sales are recorded as electricity is delivered to customers. In addition to power sales invoiced and recorded during the month, TVA accrues estimated unbilled revenues for power sales provided to five customers whose billing date occurs prior to the end of the month. Exchange power sales are presented in the accompanying Consolidated Statements of Operations as a component of sales of electricity. Exchange power sales are sales of excess power after meeting TVA native load and directly served requirements. Native load refers to the customers on whose behalf a company, by statute, franchise, regulatory requirement, or contract, has undertaken an obligation to serve. TVA engages in other arrangements in addition to power sales. Certain other revenue from activities related to TVA's overall mission is recorded in Other revenue. Revenues that are not related to the overall mission are recorded in Other income, net.

Inventories

Certain Fuel, Materials, and Supplies. Materials and supplies inventories are valued using an average unit cost method. A new average cost is computed after each inventory purchase transaction, and inventory issuances are priced at the latest moving weighted average unit cost. Coal, fuel oil, and natural gas inventories are valued using an average cost method. A new weighted average cost is computed monthly, and monthly issues are priced accordingly.

Renewable Energy Certificates. TVA accounts for Renewable Energy Certificates ("RECs") using the specific identification cost method. RECs that are acquired through power purchases are recorded as inventory and charged to purchased power expense when the RECs are subsequently used or sold. TVA assigns a value to the RECs at the inception of

102

Table of Contents

the power purchase arrangement using a relative standalone selling price approach. RECs created through TVA-owned asset generation are recorded at zero cost.

Emission Allowances. TVA accounts for emission allowances using the specific identification cost method. Allowances that are acquired through third party purchases are recorded as inventory at cost and charged to operating expense based on tons emitted during the respective compliance periods.

Allowance for Inventory Obsolescence. TVA reviews materials and supplies inventories by category and usage on a periodic basis. Each category is assigned a probability of becoming obsolete based on the type of material and historical usage data. TVA has a fleet-wide inventory management policy for each generation type. Based on the estimated value of the inventory, TVA adjusts its allowance for inventory obsolescence.

Pre-Commercial Plant Operations

As part of the process of completing the construction of a generating unit, the electricity produced is used to serve the demands of the electric system. TVA estimates revenues earned during pre-commercial operations at the fair value of the energy delivered based on TVA's hourly incremental dispatch cost. Pre-commercial plant operations began on Colbert Combustion Turbine Units 9-10 in June 2023 and on Colbert Combustion Turbine Unit 11 in early July 2023. All three units became operational on July 25, 2023. Estimated revenue of $3 million related to this project was capitalized to offset project costs for the year ended September 30, 2023. TVA also capitalized related fuel costs for this project of $3 million for the year ended September 30, 2023.

Property, Plant, and Equipment, and Depreciation

Property, Plant, and Equipment. Additions to plant are recorded at cost, which includes direct and indirect costs. The cost of current repairs and minor replacements is charged to operating expense. When property, plant, and equipment is retired, accumulated depreciation is charged for the original cost of the assets. Gains or losses are only recognized upon the sale of land or an entire operating unit. TVA capitalizes certain costs incurred in connection with developing or obtaining internal-use software. Capitalized software costs are included in Property, plant, and equipment on the Consolidated Balance Sheets and are generally amortized over seven years.

Nuclear Fuel. Nuclear fuel, which is included in Property, plant, and equipment, is valued using the average cost method for raw materials and the specific identification method for nuclear fuel in a reactor. Amortization of nuclear fuel in a reactor is calculated on a units-of-production basis and is included in fuel expense.

TVA, the U.S. Department of Energy ("DOE"), and certain nuclear fuel contractors have entered into agreements, referred to as the Down-blend Offering for Tritium ("DBOT"), that provide for the production, processing, and storage of low-enriched uranium that is to be made using surplus DOE highly enriched uranium and other uranium. Low-enriched uranium can be fabricated into fuel for use in a nuclear power plant. Production of the low-enriched uranium began in 2019 and is contracted to continue through September 2025. Contract activity will consist of storage and flag management. Flag management ensures that the uranium is of U.S. origin, free from foreign obligations, and unencumbered by policy restrictions, so that it can be used in connection with the production of tritium. Under the terms of the interagency agreement between the DOE and TVA, the DOE will reimburse TVA for a portion of the costs of converting the highly enriched uranium to low-enriched uranium. Since 2019, TVA has received $219 million in reimbursements from the DOE, which is recorded as a reduction in nuclear fuel inventory costs. At September 30, 2023, TVA recorded $11 million in Accounts receivable, net related to this agreement.

Depreciation. TVA accounts for depreciation of its properties using the composite depreciation convention of accounting. Under the composite method, assets with similar economic characteristics are grouped and depreciated as one asset. Depreciation is generally computed on a straight-line basis over the estimated service lives of the various classes of assets. The estimation of asset useful lives requires management judgment, supported by external depreciation studies of historical asset retirement experience. Depreciation rates are determined based on external depreciation studies that are updated approximately every five years, with the latest study implemented during the first quarter of 2022.

103

Table of Contents

Depreciation expense for the years ended September 30, 2023, 2022, and 2021 was $1.9 billion, $1.8 billion, and $1.4 billion, respectively. Depreciation expense expressed as a percentage of the average annual depreciable completed plant was 3.14 percent for 2023, 2.98 percent for 2022, and 2.28 percent for 2021. Average depreciation rates by asset class are as follows:


Property, Plant, and Equipment Depreciation Rates At September 30 (percent)
	2023	2022	2021
Asset Class
Nuclear	2.73	2.72	2.38
Coal-fired(1)	4.98	4.27	1.95
Hydroelectric	1.82	1.85	1.60
Gas and oil-fired	3.17	3.38	2.98
Transmission	1.52	1.51	1.34
Other	4.43	3.64	7.12

Note

(1) The rates include the acceleration of depreciation related to retiring certain coal-fired units and potentially retiring the remainder of the coal-fired fleet by 2035. See Note 7 — Plant Closures.

Reacquired Rights. Property, plant, and equipment includes intangible reacquired rights, net of amortization, of $324 million and $178 million as of September 30, 2023 and 2022, respectively, related to the purchase of residual interests from lease/leaseback agreements of certain combustion turbine units ("CTs"). Reacquired rights are amortized over the estimated useful lives of the underlying CTs which range from 30 to 35 years. Amortization expense was $10 million, $6 million, and $8 million for the years ended September 30, 2023, 2022, and 2021, respectively, and accumulated amortization at September 30, 2023 and 2022 totaled $52 million and $42 million, respectively. At September 30, 2023, the estimated aggregate amortization expense for each of the next five years and thereafter is shown below:


	2024		2025		2026		2027		2028		Thereafter
Reacquired Rights	$	11	$	12	$	11	$	12	$	11	$	267

Impairment of Assets. TVA evaluates long-lived assets for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. For long-lived assets, TVA bases its evaluation on impairment indicators such as the nature of the assets, the future economic benefit of the assets, any historical or future profitability measurements, regulatory approval and ability to set rates at levels that allow for recoverability of the assets, and other external market conditions or factors that may be present. If such impairment indicators are present or other factors exist that indicate that the carrying amount of an asset may not be recoverable, TVA determines whether an impairment has occurred based on an estimate of undiscounted cash flows attributable to the asset as compared with the carrying value of the asset. If an impairment has occurred, the amount of the impairment recognized is measured as the excess of the asset's carrying value over its fair value. Additionally, TVA regularly evaluates construction projects. If the project is canceled or deemed to have no future economic benefit, the project is written off as an asset impairment or, upon TVA Board approval, reclassified as a regulatory asset and amortized over the Board-approved period. See Note 7 — Plant Closures.

Leases

TVA recognizes a lease asset and lease liability for leases with terms of greater than 12 months. Lease assets represent TVA's right to use an underlying asset for the lease term, and lease liabilities represent TVA's obligation to make lease payments arising from the lease, both of which are recognized based on the present value of the future minimum lease payments over the lease term at the commencement date. TVA has certain lease agreements that include variable lease payments that are based on energy production levels. These variable lease payments are not included in the measurement of the lease assets or lease liabilities but are recognized in the period in which the expenses are incurred.

While not specifically structured as leases, certain power purchase agreements ("PPAs") are deemed to contain a lease of the underlying generating units when the terms convey the right to control the use of the assets. Amounts recorded for these leases are generally based on the amount of the scheduled capacity payments due over the remaining terms of the PPAs, the terms of which vary. The total lease obligations included in Accounts payable and accrued liabilities, Other long-term liabilities, and Finance lease liabilities related to these agreements were $390 million and $135 million for finance and operating leases, respectively, at September 30, 2023. The total lease obligations included in Accounts payable and accrued liabilities, Other long-term liabilities, and Finance lease liabilities related to these agreements were $425 million and $133 million for finance and operating leases, respectively, at September 30, 2022.

104

Table of Contents

TVA has agreements with lease and non-lease components and has elected to account for the components separately. Consideration is allocated to lease and non-lease components generally based on relative standalone selling prices.

TVA has lease agreements which include options for renewal and early termination. The intent to renew a lease varies depending on the lease type and asset. Renewal options that are reasonably certain to be exercised are included in the lease measurements. The decision to terminate a lease early is dependent on various economic factors. No termination options have been included in TVA's lease measurements.

Leases with an initial term of 12 months or less, which do not include an option to extend the initial term of the lease to greater than 12 months that TVA is reasonably certain to exercise, are not recorded on the Consolidated Balance Sheets at September 30, 2023.

Operating leases are recognized on a straight-line basis over the term of the lease agreement. Rent expense associated with short-term leases and variable leases is recorded in Operating and maintenance expense, Fuel expense, or Purchased power expense on the Consolidated Statements of Operations. Expenses associated with finance leases result in the separate presentation of interest expense on the lease liability and amortization expense of the related lease asset on the Consolidated Statements of Operations.

Decommissioning Costs

TVA recognizes legal obligations associated with the future retirement of certain tangible long-lived assets. These obligations relate to fossil fuel-fired generating plants, nuclear generating plants, hydroelectric generating plants/dams, transmission structures, and other property-related assets. Activities involved with retiring these assets could include decontamination and demolition of structures, removal and disposal of wastes, and site restoration. Revisions to the forecasted costs of decommissioning activities are made whenever factors indicate that the timing or amounts of estimated cash flows have changed materially. Studies are updated for both nuclear and non-nuclear decommissioning costs at least every five years. Any accretion or depreciation expense related to these liabilities and assets is charged to a regulatory asset. See Note 10 — Regulatory Assets and Liabilities — Nuclear Decommissioning Costs and Non-Nuclear Decommissioning Costs and Note 13 — Asset Retirement Obligations.

Investment Funds

Investment funds consist primarily of trust funds designated to fund decommissioning requirements (see Note 22 — Commitments and Contingencies — Contingencies — Decommissioning Costs), the Supplemental Executive Retirement Plan ("SERP") (see Note 20 — Benefit Plans — Overview of Plans and Benefits — Supplemental Executive Retirement Plan), the Deferred Compensation Plan ("DCP"), and the Restoration Plan ("RP"). The Nuclear Decommissioning Trust ("NDT") holds funds primarily for the ultimate decommissioning of TVA's nuclear power plants. The Asset Retirement Trust ("ART") holds funds primarily for the costs related to the future closure and retirement of TVA's other long-lived assets. The NDT, ART, SERP, DCP, and RP funds are invested in portfolios of securities generally designed to achieve a return in line with overall equity and debt market performance. The NDT, ART, SERP, DCP, and RP funds are all classified as trading.

Research and Development Costs

Research and development costs are expensed when incurred. TVA's research programs include those related to power delivery technologies, emerging technologies (clean energy, renewables, distributed resources, and energy efficiency), technologies related to generation (fossil fuel, nuclear, and hydroelectric), and environmental technologies.

Tax Equivalents

TVA is not subject to federal income taxation. In addition, neither TVA nor its property, franchises, or income is subject to taxation by states or their subdivisions. The TVA Act requires TVA to make payments to states and counties in which TVA conducts its power operations and in which TVA has acquired power properties previously subject to state and local taxation. The total amount of these payments is five percent of gross revenues from sales of power during the preceding year, excluding sales or deliveries to other federal agencies and off-system sales with other utilities, with a provision for minimum payments under certain circumstances. TVA calculates tax equivalent expense by subtracting the prior year fuel cost-related tax equivalent regulatory asset or liability from the payments made to the states and counties during the current year and adding back the current year fuel cost-related tax equivalent regulatory asset or liability. Fuel cost-related tax equivalent expense is recognized in the same accounting period in which the fuel cost-related revenue is recognized.

Maintenance Costs

TVA records maintenance costs and repairs related to its property, plant, and equipment on the Consolidated Statements of Operations as they are incurred except for the recording of certain regulatory assets for retirement and removal costs.

105

Table of Contents

2. Impact of New Accounting Standards and Interpretations

The following accounting standards have been issued but as of September 30, 2023, were not effective and had not been adopted by TVA:


Accounting for Contract Assets and Contract Liabilities from Contracts with Customers
Description			This guidance requires an entity (acquirer) to recognize and measure contract assets and contract liabilities acquired in a business combination in accordance with revenue with customers. It is expected that an acquirer will generally recognize and measure acquired contract assets and contract liabilities in a manner consistent with how the acquiree recognized and measured contract assets and contract liabilities in the acquiree’s financial statement. The entity should apply the standard prospectively to business combinations occurring on or after the effective date of the standard.
Effective Date for TVA			This new standard is effective for TVA’s interim and annual reporting periods beginning October 1, 2023. TVA adopted the standard on October 1, 2023, on a prospective basis. While early adoption was permitted, TVA did not adopt the standard early.
Effect on the Financial Statements or Other Significant Matters			Adoption of this standard did not have a material impact on TVA's financial condition, results of operations, or cash flows.


Troubled Debt Restructurings and Vintage Disclosures
Description			This guidance eliminates the recognition and measurement guidance on troubled debt restructuring for creditors that have adopted Financial Instruments-Credit Losses and requires enhanced disclosures about loan modifications for borrowers experiencing financial difficulty. Additionally, the guidance requires public business entities to present current-period gross write-offs by year of origination in their vintage disclosures. The entity should apply the standard prospectively except for the transition method related to the recognition and measurement of troubled debt restructuring. For the transition method, an entity has the option to apply a modified retrospective transition method, resulting in a cumulative-effect adjustment to retained earnings in the period of adoption.
Effective Date for TVA			This new standard is effective for TVA’s interim and annual reporting periods beginning October 1, 2023. TVA adopted the standard on October 1, 2023, on a prospective basis. While early adoption was permitted, TVA did not adopt the standard early.
Effect on the Financial Statements or Other Significant Matters			Adoption of this standard did not have a material impact on TVA's financial condition, results of operations, or cash flows.

3. Accounts Receivable, Net

Accounts receivable primarily consist of amounts due from customers for power sales. The table below summarizes the types and amounts of TVA's accounts receivable:


Accounts Receivable, Net At September 30 (in millions)
	2023		2022
Power receivables	$	1,627	$	1,899
Other receivables	118		108

Accounts receivable, net(1)	$	1,745	$	2,007

Note

(1) Allowance for uncollectible accounts was less than $1 million at both September 30, 2023 and 2022, and therefore is not represented in the table above.

4. Inventories, Net

The table below summarizes the types and amounts of TVA's inventories:


Inventories, Net At September 30 (in millions)
	2023		2022
Materials and supplies inventory	$	849	$	808
Fuel inventory	313		303
Renewable energy certificates/emissions allowance inventory, net	15		18
Allowance for inventory obsolescence	(69)		(57)
Inventories, net	$	1,108	$	1,072

106

Table of Contents

5. Other Current Assets

Other current assets consisted of the following:


Other Current Assets At September 30 (in millions)
	2023		2022(1)
Inventory work-in-progress	$	28	$	18
Current portion of prepaid long-term service agreements	25		12
Commodity contract derivative assets	21		172
Prepaid software maintenance	18		14
Prepaid insurance	16		16

Other	26		25
Other current assets	$	134	$	257

Note

(1) At September 30, 2022, $18 million, $14 million, $16 million, and $12 million previously classified as Other (a component of Other current assets) have been reclassified to Inventory work-in-progress (a component of Other current assets), Prepaid software maintenance (a component of Other current assets), Prepaid insurance (a component of Other current assets), and Current portion of prepaid long-term service agreements (a component of Other current assets), respectively, to conform with current year presentation.

Commodity Contract Derivative Assets. TVA enters into certain derivative contracts for natural gas that require physical

delivery of the contracted quantity of the commodity as well as certain financial derivative contracts to hedge exposure to the price of natural gas. Commodity contract derivative assets classified as current include deliveries or settlements that will occur within 12 months or less. See Note 15 — Risk Management Activities and Derivative Transactions — Derivatives Not Receiving Hedge Accounting Treatment — Commodity Derivatives and — Commodity Derivatives under the FHP for a discussion of TVA's commodity contract derivatives.

6. Net Completed Plant

Net completed plant consisted of the following:


Net Completed Plant At September 30 (in millions)
	2023						2022
	Cost		Accumulated Depreciation		Net		Cost		Accumulated Depreciation		Net
Coal-fired(1)	$	18,525	$	14,464	$	4,061	$	18,145	$	13,649	$	4,496
Gas and oil-fired	6,663		2,057		4,606		6,112		1,957		4,155
Nuclear	26,803		13,557		13,246		26,629		12,928		13,701
Transmission	9,375		3,359		6,016		8,919		3,301		5,618
Hydroelectric	4,109		1,241		2,868		3,987		1,192		2,795
Other electrical plant	1,798		780		1,018		1,724		807		917
Multipurpose dams	900		404		496		900		396		504
Other stewardship	26		9		17		26		9		17

Total	$	68,199	$	35,871	$	32,328	$	66,442	$	34,239	$	32,203

Note

(1) TVA recognized accelerated depreciation as a result of the decision to idle or retire certain units and the potential retirement of the remainder of the coal-fired fleet by 2035. See Note 7 — Plant Closures.

107

Table of Contents

7. Plant Closures

Background

TVA must continuously evaluate all generating assets to ensure an optimal energy portfolio that provides safe, clean, and reliable power while maintaining flexibility and fiscal responsibility to the people of the Tennessee Valley. Based on results of assessments presented to the TVA Board in 2019, the retirement of Bull Run Fossil Plant ("Bull Run") by December 2023 was approved, and as of September 30, 2023, the facility was retired. In addition, TVA is evaluating the impact of retiring the balance of the coal-fired fleet by 2035, and that evaluation includes environmental reviews, public input, and TVA Board approval. Due to these evaluations, certain planning assumptions were updated, and their financial impacts are discussed below.

In January 2023, TVA issued its Record of Decision to retire the two coal-fired units at Cumberland Fossil Plant ("Cumberland") by the end of CY 2026 and CY 2028.

Financial Impact

TVA's policy is to adjust depreciation rates to reflect the most current assumptions, ensuring units will be fully depreciated by the applicable retirement dates. As a result of TVA's decision to accelerate the retirement of Bull Run, TVA has recognized a cumulative $659 million of accelerated depreciation since the second quarter of 2019. Of this amount, $177 million, $140 million, and $136 million were recognized for the years ended September 30, 2023, 2022, and 2021, respectively. TVA's decision to retire the two units at Cumberland is estimated to result in approximately $16 million of additional depreciation quarterly, which does not include any potential impact from additions or retirements to net completed plant. TVA estimates it has recognized a cumulative $48 million of additional depreciation since January 2023, related to this decision.

TVA also recognized $14 million, $22 million, and $4 million in Operating and maintenance expense related to additional inventory reserves and project write-offs for the coal-fired fleet, including Bull Run and Cumberland, for the years ended September 30, 2023, 2022, and 2021, respectively.

8. Leases

The following table provides information regarding the presentation of leases on the Consolidated Balance Sheets:


Amounts Recognized on TVA's Consolidated Balance Sheets At September 30 (in millions)
		2023		2022
Assets
Operating	Operating lease assets, net of amortization	$	177	$	155
Finance	Finance leases	572		630
Total lease assets		$	749	$	785

Liabilities
Current
Operating	Accounts payable and accrued liabilities	$	71	$	59
Finance	Accounts payable and accrued liabilities	56		59
Non-current
Operating	Other long-term liabilities	93		93
Finance	Finance lease liabilities	576		628
Total lease liabilities		$	796	$	839

108

Table of Contents

TVA's leases consist primarily of railcars, equipment, real estate/land, power generating facilities, and gas pipelines. TVA's leases have various terms and expiration dates remaining from less than one year to 23 years. The components of lease costs were as follows:


Lease Costs For the years ended September 30 (in millions)
	2023		2022		2021
Operating lease costs(1)	$	69	$	56	$	52
Variable lease costs(1)	134		78		75
Short-term lease costs(1)	18		26		12
Finance lease costs
Amortization of lease assets(2)	57		58		51
Interest on lease liabilities(3)(4)	43		42		39
Total finance lease costs	100		100		90
Total lease costs	$	321	$	260	$	229

Notes

(1) Costs are included in Operating and maintenance expense, Fuel expense, Purchased power expense, and Tax equivalents expense on the Consolidated Statements of Operations.

(2) Expense is included in Depreciation and amortization expense on the Consolidated Statements of Operations.

(3) Expense is included in Interest expense on the Consolidated Statements of Operations.

(4) Certain finance leases receive regulatory accounting treatment and are reclassified to Fuel expense and Purchased power expense.

TVA's variable lease costs are primarily related to renewable energy purchase agreements that require TVA to purchase all output from the underlying facility. Payments under those agreements are solely based on the actual output over the lease term. Certain TVA lease agreements contain renewal options. Those renewal options that are reasonably certain to be exercised are included in the lease measurements.

The following table contains additional information with respect to cash and non-cash activities related to leases:


Amounts Recognized on TVA's Consolidated Statements of Cash Flows For the years ended September 30 (in millions)
	2023		2022		2021
Operating cash flows for operating leases	$	77	$	57	$	53
Operating cash flows for finance leases	43		42		39
Financing cash flows for finance leases	56		60		52

Lease assets obtained in exchange for lease obligations (non-cash)
Operating leases(1)	$	84	$	43	$	(22)
Finance leases	3		—		233

Note

(1) Amount for 2021 represents a non-cash reduction due to a lease that was amended during the fiscal year resulting in derecognition of the operating lease asset and obligation upon remeasurement.

TVA has certain finance leases under PPAs under which the present value of the minimum lease payments exceeds the fair value of the related lease asset at the date of measurement. This resulted in an interest rate that was higher than TVA's incremental borrowing rate. The weighted average remaining lease terms in years and the weighted average discount rate for TVA's operating and financing leases were as follows:

109

Table of Contents


Weighted Averages At September 30
	2023	2022
Weighted average remaining lease terms
Operating leases	3 years	3 years
Finance leases	10 years	11 years

Weighted average discount rate(1)
Operating leases	4.1%	1.5%
Finance leases	21.6%	17.8%

Note

(1) The discount rate is calculated using the rate implicit in a lease if it is readily determinable. If the rate used by the lessor is not readily determinable, TVA uses its incremental borrowing rate as permitted by accounting guidance. The incremental borrowing rate is influenced by TVA's credit rating and lease term and as such may differ for individual leases, embedded leases, or portfolios of leased assets.

The following table presents maturities of lease liabilities and a reconciliation of the undiscounted cash flows to lease liabilities at September 30, 2023:


Future Minimum Lease Payments Minimum payments outstanding at September 30, 2023 (in millions)
Operating leases
2024	$	76
2025	51
2026	24
2027	9
2028	3
Thereafter	11
Minimum annual payments	174
Less: present value discount	(10)
Operating present value of net minimum lease payments	$	164

Finance leases
2024	$	109
2025	107
2026	106
2027	104
2028	102
Thereafter	450
Minimum annual payments	978
Less: amount representing interest	(346)
Finance present value of net minimum lease payments	$	632

During the fourth quarter of 2023, TVA entered into a PPA with a term of 2 years that commenced in October 2023. Lease payments made over the term are expected to total approximately $43 million.

TVA has entered into three PPAs with renewable resource providers for solar generation and rights to charge and discharge battery energy storage systems. The systems are considered a lease component in these agreements. These PPAs have terms of 20 years, and are expected to commence between April 2024 and April 2025. Total capacity payments related to these batteries over the term of these PPAs are expected to total $394 million.

110

Table of Contents

9. Other Long-Term Assets

The table below summarizes the types and amounts of TVA's other long-term assets:


Other Long-Term Assets At September 30 (in millions)
	2023		2022
Loans and other long-term receivables, net	$	97	$	99
Prepaid long-term service agreements	64		74
EnergyRight® receivables, net	47		49
Prepaid capital assets	28		—
Commodity contract derivative assets	12		102


Other	82		70
Total other long-term assets	$	330	$	394

Loans and Other Long-Term Receivables. TVA's loans and other long-term receivables primarily consist of economic development loans for qualifying organizations and a receivable for reimbursements to recover the cost of providing long-term, on-site storage for spent nuclear fuel. The current and long-term portions of the loans receivable are reported in Accounts receivable, net and Other long-term assets, respectively, on TVA's Consolidated Balance Sheets. At September 30, 2023 and 2022, the carrying amount of the loans receivable, net of discount, reported in Accounts receivable, net was $7 million and $6 million, respectively.

EnergyRight® Receivables. In association with the EnergyRight® program, TVA's local power company customers ("LPCs") offer financing to end-use customers for the purchase of energy-efficient equipment. Depending on the nature of the energy-efficiency project, loans may have a maximum term of five years or 10 years. TVA purchases the resulting loans receivable from its LPCs. The loans receivable are then transferred to a third-party bank with which TVA has agreed to repay in full any loans receivable that have been in default for 180 days or more or that TVA has determined are uncollectible. Given this continuing involvement, TVA accounts for the transfer of the loans receivable as secured borrowings. The current and long-term portions of the loans receivable are reported in Accounts receivable, net and Other long-term assets, respectively, on TVA's Consolidated Balance Sheets. At September 30, 2023 and 2022, the carrying amount of the loans receivable, net of discount, reported in Accounts receivable, net was $12 million and $13 million, respectively. See Note 12 — Other Long-Term Liabilities for information regarding the associated financing obligation.

Allowance for Loan Losses. The allowance for loan loss is an estimate of expected credit losses, measured over the estimated life of the loan receivables, that considers reasonable and supportable forecasts of future economic conditions in addition to information about historical experience and current conditions. See Note 1 — Summary of Significant Accounting Policies — Allowance for Uncollectible Accounts.

The allowance components, which consist of a collective allowance and specific loans allowance, are based on the risk characteristics of TVA's loans. Loans that share similar risk characteristics are evaluated on a collective basis in measuring credit losses, while loans that do not share similar risk characteristics with other loans are evaluated on an individual basis.


Allowance Components At September 30 (in millions)
	2023		2022
EnergyRight® loan reserve	$	1	$	1
Economic development loan collective reserve	1		1
Economic development loan specific loan reserve	1		1

Total allowance for loan losses	$	3	$	3

Prepaid Long-Term Service Agreements. TVA has entered into various long-term service agreements for major

maintenance activities at certain of its combined cycle plants. TVA uses the direct expense method of accounting for these

arrangements. TVA accrues for parts when it takes ownership and for contractor services when they are rendered. Under

certain of these agreements, payments made exceed the value of parts received and services rendered. The current and long-term portions of the resulting prepayments are reported in Other current assets and Other long-term assets, respectively, on

TVA's Consolidated Balance Sheets. At September 30, 2023 and 2022, prepayments of $25 million and $12 million, respectively, were recorded in Other current assets.

111

Table of Contents

Commodity Contract Derivative Assets. TVA enters into certain derivative contracts for natural gas that require physical delivery of the contracted quantity of the commodity as well as certain financial derivative contracts to hedge exposure to the price of natural gas. See Note 15 — Risk Management Activities and Derivative Transactions — Derivatives Not Receiving Hedge Accounting Treatment — Commodity Derivatives and — Commodity Derivatives under the FHP for a discussion of TVA's commodity contract derivatives.

10. Regulatory Assets and Liabilities

TVA records certain assets and liabilities that result from the regulated ratemaking process that would not be recorded under GAAP for non-regulated entities. As such, certain items that would generally be reported in earnings or that would impact the Consolidated Statements of Operations are recorded as regulatory assets or regulatory liabilities. Regulatory assets generally represent incurred costs that have been deferred because such costs are probable of future recovery in customer rates. Regulatory liabilities generally represent obligations to make refunds to customers for previous collections for costs that are not likely to be incurred or deferral of gains that will be credited to customers in future periods. Components of regulatory assets and regulatory liabilities are summarized in the table below.


Regulatory Assets and Liabilities At September 30 (in millions)
	2023		2022
Current regulatory assets
Unrealized losses on interest rate derivatives	$	31	$	47
Unrealized losses on commodity derivatives	136		14




Fuel cost adjustment receivable	11		77

Total current regulatory assets	178		138

Non-current regulatory assets
Retirement benefit plans deferred costs	1,440		1,839
Non-nuclear decommissioning costs	2,922		2,856
Unrealized losses on interest rate derivatives	272		479
Nuclear decommissioning costs	728		821
Unrealized losses on commodity derivatives	52		1




Other non-current regulatory assets	152		138
Total non-current regulatory assets	5,566		6,134
Total regulatory assets	$	5,744	$	6,272

Current regulatory liabilities
Fuel cost adjustment tax equivalents	$	201	$	218

Unrealized gains on commodity derivatives	21		173
Total current regulatory liabilities	222		391

Non-current regulatory liabilities
Retirement benefit plans deferred credits	95		70
Unrealized gains on commodity derivatives	12		102
Total non-current regulatory liabilities	107		172
Total regulatory liabilities	$	329	$	563

Retirement Benefit Plans Deferred Costs (Credits). TVA measures the funded status of its pension and post-retirement ("OPEB") benefit plans at each year-end balance sheet date. The funded status is measured as the difference between the fair value of plan assets and the benefit obligations at the measurement date for each plan. The changes in funded status are actuarial gains and losses that are recognized on TVA's Consolidated Balance Sheets by adjusting the recognized pension and OPEB liabilities, with the offset deferred as a regulatory asset or a regulatory liability. In an unregulated environment, these deferred costs (credits) would be recognized as an increase or decrease to accumulated other comprehensive income (loss) ("AOCI").

112

Table of Contents

"Incurred cost" is a cost arising from cash paid out or an obligation to pay for an acquired asset or service, and a loss from any cause that has been sustained and for which payment has been or must be made. In the cases of pension and OPEB costs, the unfunded obligation represents a projected liability to the employee for services rendered, and thus it meets the definition of an incurred cost. Therefore, amounts that otherwise would be charged to AOCI for these costs are recorded as a regulatory asset or liability since TVA has historically recovered pension and OPEB expense in rates. Through historical and current year expense included in ratemaking, the TVA Board has demonstrated the ability and intent to include pension and OPEB costs in allowable costs and in rates for ratemaking purposes. As a result, it is probable that future revenue will result from inclusion of the pension and OPEB regulatory assets or regulatory liability in allowable costs for ratemaking purposes.

The regulatory asset and liability are classified as long-term, which is consistent with the pension and OPEB liabilities, and are not amortized to the Consolidated Statements of Operations over a specified recovery period. They are adjusted either upward or downward each year in conjunction with the adjustments to the unfunded pension liability and OPEB liability, as calculated by the actuaries. Ultimately the regulatory asset and liability will be recognized in the Consolidated Statements of Operations in the form of pension and OPEB expense as the actuarial liabilities are eliminated in future periods. See Note 20 — Benefit Plans — Obligations and Funded Status.

Additionally on October 1, 2014, TVA began recognizing pension costs as a regulatory asset to the extent that the amount calculated under GAAP as pension expense differs from the amount TVA contributes to the pension plan. As a result of previous plan design changes, future contributions are expected to exceed the expense calculated under U.S. GAAP. Accordingly, TVA discontinued this regulatory accounting practice as all such deferred costs were recovered as of September 30, 2023.

Non-Nuclear Decommissioning Costs. Non-nuclear decommissioning costs include (1) certain deferred charges related to the future closure and decommissioning of TVA's non-nuclear long-lived assets, (2) recognition of changes in the liability, (3) recognition of changes in the value of TVA's ART, and (4) certain other deferred charges under the accounting rules for asset retirement obligations ("AROs"). TVA has established the ART to more effectively segregate, manage, and invest funds to help meet future non-nuclear AROs. The funds from the ART may be used, among other things, to pay the costs related to the future closure and retirement of non-nuclear long-lived assets under various legal requirements. These future costs can be funded through a combination of investment funds set aside in the ART, future earnings on those investment funds, and future cash contributions to the ART. In 2023 and 2022, TVA recovered in rates an amount determined by the average life of debt financed for non-nuclear decommissioning expenditures, assuming a 20-year debt service period, and contributions to the ART. Deferred charges will be recovered in rates based on an analysis of the expected expenditures, contributions, and investment earnings required to recover the decommissioning costs. Recovery of future decommissioning costs is dependent upon the future earnings of the ART, timing of decommissioning activities, and changes in decommissioning estimates. The regulatory asset is classified as long-term as amounts recovered are used to service debt or to contribute to the ART, which is restricted for future decommissioning costs.

Unrealized Losses on Interest Rate Derivatives. TVA uses regulatory accounting treatment to defer the unrealized gains and losses on certain interest rate derivative contracts. When amounts in these contracts are realized, the resulting gains or losses are included in the ratemaking formula. The unrealized losses on these interest rate derivatives are recorded on TVA's Consolidated Balance Sheets as current and non-current regulatory assets, and the related realized gains or losses, if any, are recorded on TVA's Consolidated Statements of Operations when the contracts settle. A portion of certain unrealized gains and losses will be amortized into earnings over the remaining lives of the contracts. Gains and losses on interest rate derivatives that are expected to be realized within the next year are included as a current regulatory asset or liability on TVA's Consolidated Balance Sheets.

Due to rising interest rates in the financial markets and net settlement payments made during 2023, TVA experienced a reduction in unrealized losses related to its derivative instruments for the year ended September 30, 2023. TVA does not recognize unrealized gains and losses from the investment portfolios and derivative instruments within earnings but rather defers all such gains and losses within a regulatory liability or asset in accordance with its accounting policy. See Note 15 — Risk Management Activities and Derivative Transactions and Note 16 — Fair Value Measurements.

Nuclear Decommissioning Costs. Nuclear decommissioning costs include (1) certain deferred charges related to the future closure and decommissioning of TVA's nuclear generating units under the Nuclear Regulatory Commission ("NRC") requirements, (2) recognition of changes in the liability, (3) recognition of changes in the value of TVA's NDT, and (4) certain other deferred charges under the accounting rules for AROs. These future costs can be funded through a combination of investment funds set aside in the NDT and ART and future earnings on those investment funds. Deferred charges will be recovered in rates based on the analysis of expected expenditures, contributions, and investment earnings required to recover the decommissioning costs. See Note 1 — Summary of Significant Accounting Policies — Investment Funds. Recovery of future decommissioning costs is dependent upon the future earnings of the NDT and ART, timing of decommissioning activities, and changes in decommissioning estimates. The regulatory asset is classified as long-term as amounts recovered are contributed to the NDT or the ART, which are restricted for future decommissioning costs.

Nuclear decommissioning costs decreased $93 million for the year ended September 30, 2023 as compared to the same period of the prior year, primarily due to investment gains in the NDT and amortization of regulatory assets into expenses

113

Table of Contents

during 2023 as amounts were collected in rates, and these increases were partially offset by accretion of the related AROs. See Note 13 — Asset Retirement Obligations and Note 16 — Fair Value Measurements.

Unrealized Gains (Losses) on Commodity Derivatives. TVA enters into certain derivative contracts for natural gas that require the physical delivery of the contracted quantity of the commodity. Unrealized gains (losses) on natural gas purchase contracts, included as part of unrealized gains (losses) on commodity derivatives, relate to the mark-to-market ("MtM") valuation of natural gas purchase contracts. The natural gas purchase contracts qualify as derivative contracts but do not qualify for cash flow hedge accounting treatment. As a result, TVA recognizes the changes in the market value of these derivative contracts as a regulatory liability or asset. This treatment reflects TVA's ability and intent to recover the cost of these commodity contracts on a settlement basis for ratemaking purposes through the fuel cost adjustment. TVA recognizes the actual cost of fuel received under these contracts in fuel expense at the time the fuel is used to generate electricity. These contracts expire at various times through March 2026. Unrealized gains and losses on contracts with a maturity of less than one year are included as a current regulatory asset or liability on TVA's Consolidated Balance Sheets. See Note 15 — Risk Management Activities and Derivative Transactions.

TVA reinstated the FHP in December 2021, and hedging activity began under the program in the second quarter of 2022. Currently, TVA is hedging exposure to the price of natural gas under the FHP. Deferred gains and losses relating to TVA's FHP are included as part of unrealized gains and losses on commodity derivatives. TVA defers all MtM unrealized gains or losses as regulatory liabilities or assets, respectively, and records the realized gains or losses in fuel and purchased power expense as the contracts settle to match the delivery period of the underlying commodity. This accounting treatment reflects TVA's ability and intent to include the realized gains or losses of these commodity contracts in future periods through the fuel cost adjustment. Net unrealized gains and losses for any settlements that occur within 12 months or less are classified as a current regulatory liability or asset. See Note 15 — Risk Management Activities and Derivative Transactions.

Fuel Cost Adjustment Receivable. The fuel cost adjustment provides a mechanism to alter rates monthly to reflect changing fuel and purchased power costs. There is typically a lag between the occurrence of a change in fuel and purchased power costs and the reflection of the change in fuel rates. Balances in the fuel cost adjustment regulatory accounts represent over-collected or under-collected revenues that offset fuel and purchased power costs, and the fuel rate is designed to recover or refund the balance in less than one year.

Other Non-Current Regulatory Assets. Other non-current regulatory assets consist of the following:

Deferred Lease Asset and Other Financing Obligations. For certain leases, TVA recognized the initial finance lease and other financing asset and liability at inception of the lease or other obligation. However, the annual expense recognized in rates is equal to the annual payments, which differs from GAAP treatment for non-regulated entities. This practice results in TVA's asset balances being higher than they otherwise would have been under GAAP, with the difference representing a regulatory asset related to the lease or other financing obligation. These costs will be amortized over the respective lease or other financing obligation terms as payments are made. As the costs associated with this regulatory asset are not currently being considered in rates and the asset is expected to increase over the next year, the regulatory asset has been classified as long-term.

Debt Reacquisition Costs. Reacquisition expenses, call premiums, and other related costs, such as unamortized debt issue costs associated with redeemed Bond issues, are deferred and amortized (accreted) on a straight-line basis over the weighted average life of TVA's debt portfolio. Because timing of additional reacquisition expenses and changes to the weighted average life of the debt are uncertain, the regulatory asset is classified as long-term.

Retirement Removal Costs. Retirement removal costs, net of salvage, that are not legally required are recognized as a regulatory asset. Net removal costs are amortized over a one-year period subsequent to completion of the removal activities. TVA treats this regulatory asset as long-term in its entirety primarily because it relates to assets that are long-term in nature.

Fuel Cost Adjustment Tax Equivalents. The fuel cost adjustment includes a provision related to the current funding of the future payments TVA will make. As TVA records the fuel cost adjustment, five percent of the calculation that relates to a future asset or liability for tax equivalent payments is recorded as a current regulatory liability and paid or refunded in the following year.

11. Variable Interest Entities

A VIE is an entity that either (i) has insufficient equity to permit the entity to finance its activities without additional subordinated financial support or (ii) has equity investors who lack the characteristics of owning a controlling financial interest. When TVA determines that it has a variable interest in a VIE, a qualitative evaluation is performed to assess which interest holders have the power to direct the activities that most significantly impact the economic performance of the entity and have the obligation to absorb losses or receive benefits that could be significant to the entity. The evaluation considers the purpose and design of the business, the risks that the business was designed to create and pass along to other entities, the activities of the business that can be directed and which party can direct them, and the expected relative impact of those activities on the economic performance of the business through its life. TVA has the power to direct the activities of an entity when it has the

114

Table of Contents

ability to make key operating and financing decisions, including, but not limited to, capital investment and the issuance of debt. Based on the evaluation of these criteria, TVA has determined it is the primary beneficiary of certain entities and as such is required to account for the VIEs on a consolidated basis.

John Sevier VIEs

In 2012, TVA entered into a $1.0 billion construction management agreement and lease financing arrangement with John Sevier Combined Cycle Generation LLC ("JSCCG") for the completion and lease by TVA of the John Sevier Combined Cycle Facility ("John Sevier CCF"). JSCCG is a special single-purpose limited liability company formed in January 2012 to finance the John Sevier CCF through a $900 million secured note issuance (the "JSCCG notes") and the issuance of $100 million of membership interests subject to mandatory redemption. The membership interests were purchased by John Sevier Holdco LLC ("Holdco"). Holdco is a special single-purpose entity, also formed in January 2012, established to acquire and hold the membership interests in JSCCG. A non-controlling interest in Holdco is held by a third-party through nominal membership interests, to which none of the income, expenses, and cash flows are allocated.

The membership interests held by Holdco in JSCCG were purchased with proceeds from the issuance of $100 million of secured notes (the "Holdco notes") and are subject to mandatory redemption pursuant to a schedule of amortizing, semi-annual payments due each January 15 and July 15, with a final payment due in January 2042. The payment dates for the mandatorily redeemable membership interests are the same as those of the Holdco notes. The sale of the JSCCG notes, the membership interests in JSCCG, and the Holdco notes closed in January 2012. The JSCCG notes are secured by TVA's lease payments, and the Holdco notes are secured by Holdco's investment in, and amounts receivable from, JSCCG. TVA's lease payments to JSCCG are equal to and payable on the same dates as JSCCG's and Holdco's semi-annual debt service payments. In addition to the lease payments, TVA pays administrative and miscellaneous expenses incurred by JSCCG and Holdco. Certain agreements related to this transaction contain default and acceleration provisions.

Due to its participation in the design, business activity, and credit and financial support of JSCCG and Holdco, TVA has determined that it has a variable interest in each of these entities. Based on its analysis, TVA has concluded that it is the primary beneficiary of JSCCG and Holdco and, as such, is required to account for the VIEs on a consolidated basis. Holdco's membership interests in JSCCG are eliminated in consolidation.

Southaven VIE

In 2013, TVA entered into a $400 million lease financing arrangement with Southaven Combined Cycle Generation LLC ("SCCG") for the lease by TVA of the Southaven Combined Cycle Facility ("Southaven CCF"). SCCG is a special single-purpose limited liability company formed in June 2013 to finance the Southaven CCF through a $360 million secured notes issuance (the "SCCG notes") and the issuance of $40 million of membership interests subject to mandatory redemption. The membership interests were purchased by Southaven Holdco LLC ("SHLLC"). SHLLC is a special single-purpose entity, also formed in June 2013, established to acquire and hold the membership interests in SCCG. A non-controlling interest in SHLLC is held by a third-party through nominal membership interests, to which none of the income, expenses, and cash flows of SHLLC are allocated.

The membership interests held by SHLLC were purchased with proceeds from the issuance of $40 million of secured notes (the "SHLLC notes") and are subject to mandatory redemption pursuant to a schedule of amortizing, semi-annual payments due each February 15 and August 15, with a final payment due on August 15, 2033. The payment dates for the mandatorily redeemable membership interests are the same as those of the SHLLC notes, and the payment amounts are sufficient to provide returns on, as well as returns of, capital until the investment has been repaid to SHLLC in full. The rate of return on investment to SHLLC is seven percent, which is reflected as interest expense in the Consolidated Statements of Operations. SHLLC is required to pay a pre-determined portion of the return on investment to Seven States Southaven, LLC ("SSSL") on each lease payment date as agreed in SHLLC's formation documents (the "Seven States Return"). The current and long-term portions of the Membership interests of VIE subject to mandatory redemption are included in Accounts payable and accrued liabilities and Other long-term liabilities, respectively.

The payment dates for the mandatorily redeemable membership interests are the same as those of the SHLLC notes. The SCCG notes are secured by TVA's lease payments, and the SHLLC notes are secured by SHLLC's investment in, and amounts receivable from, SCCG. TVA's lease payments to SCCG are payable on the same dates as SCCG's and SHLLC's semi-annual debt service payments and are equal to the sum of (i) the amount of SCCG's semi-annual debt service payments, (ii) the amount of SHLLC's semi-annual debt service payments, and (iii) the amount of the Seven States Return. In addition to the lease payments, TVA pays administrative and miscellaneous expenses incurred by SCCG and SHLLC. Certain agreements related to this transaction contain default and acceleration provisions.

In the event that TVA were to choose to exercise an early buy out feature of the Southaven facility lease, in part or in whole, TVA must pay to SCCG amounts sufficient for SCCG to repay or partially repay on a pro rata basis the membership interests held by SHLLC, including any outstanding investment amount plus accrued but unpaid return. TVA also has the right, at any time and without any early redemption of the other portions of the Southaven facility lease payments due to SCCG, to fully repay SHLLC's investment, upon which repayment SHLLC will transfer the membership interests to a designee of TVA.

115

Table of Contents

TVA participated in the design, business activity, and financial support of SCCG and has determined that it has a direct variable interest in SCCG resulting from risk associated with the value of the Southaven CCF at the end of the lease term. Based on its analysis, TVA has determined that it is the primary beneficiary of SCCG and, as such, is required to account for the VIE on a consolidated basis.

Impact on Consolidated Financial Statements

The financial statement items attributable to carrying amounts and classifications of JSCCG, Holdco, and SCCG as of September 30, 2023 and 2022, as reflected on the Consolidated Balance Sheets, are as follows:


Summary of Impact of VIEs on Consolidated Balance Sheets At September 30 (in millions)
	2023		2022




Current liabilities
Accrued interest	$	9	$	10
Accounts payable and accrued liabilities	1		2
Current maturities of long-term debt of variable interest entities	35		39
Total current liabilities	45		51
Other liabilities
Other long-term liabilities	17		18
Long-term debt, net
Long-term debt of variable interest entities, net	933		968
Total liabilities	$	995	$	1,037

Interest expense of $48 million, $50 million, and $52 million related to debt of VIEs and membership interests of variable interest entity subject to mandatory redemption is included on the Consolidated Statements of Operations for the years ended September 30, 2023, 2022, and 2021, respectively.

At September 30, 2023, TVA had outstanding debt of VIEs of $968 million and outstanding membership interests subject to mandatory redemption (including current portion) of $18 million issued by one of its VIEs of which it is the primary beneficiary. The following table sets forth TVA's future payments at September 30, 2023:


Maturities Due in the Year Ending September 30 (in millions)
	2024		2025		2026		2027		2028		Thereafter
Long-term debt of VIEs including current maturities(1)	$	35	$	37	$	39	$	40	$	42	$	781
Membership interests of variable interest entity subject to mandatory redemption	1		1		1		1		1		13

Note

(1) Long-term debt of VIEs does not include non-cash item of unamortized debt issue costs of $6 million.

Creditors of the VIEs do not have any recourse to the general credit of TVA. TVA does not have any obligations to provide financial support to the VIEs other than as prescribed in the terms of the agreements related to these transactions.

116

Table of Contents

12. Other Long-Term Liabilities

Other long-term liabilities consist primarily of liabilities related to certain derivative agreements as well as liabilities related to operating leases. The table below summarizes the types and amounts of Other long-term liabilities:


Other Long-Term Liabilities At September 30 (in millions)
	2023		2022(1)
Interest rate swap liabilities	$	627	$	851
Operating lease liabilities	93		93
Currency swap liabilities	131		228
Commodity contract derivative liabilities	52		1
EnergyRight® financing obligation	55		58
Long-term deferred compensation	41		39
Advances for construction	56		53
Long-term deferred revenue	45		39

Other	111		123
Total other long-term liabilities	$	1,211	$	1,485

Note

(1) At September 30, 2022, $1 million previously classified as Other (a component of Other long-term liabilities) has been reclassified to Commodity contract derivative liabilities (a component of Other long-term liabilities) to conform with current year presentation.

Interest Rate Swap Liabilities. TVA uses interest rate swaps to fix variable short-term debt to a fixed rate. The values of these derivatives are included in Other current assets, Accounts payable and accrued liabilities, Accrued interest, and Other long-term liabilities on the Consolidated Balance Sheets. See Note 15 — Risk Management Activities and Derivative Transactions — Overview of Accounting Treatment and Derivatives Not Receiving Hedge Accounting Treatment — Interest Rate Derivatives for information regarding the interest rate swap liabilities.

Operating Lease Liabilities. TVA's operating leases consist primarily of railcars, equipment, real estate/land, and power generating facilities. At September 30, 2023 and 2022, the current portion of TVA's operating leases reported in Accounts payable and accrued liabilities was $71 million and $59 million, respectively. See Note 8 — Leases for more information regarding leases.

Currency Swap Liabilities. To protect against exchange rate risk related to British pound sterling denominated Bond transactions, TVA entered into foreign currency hedges. The values of these derivatives are included in Accounts payable and accrued liabilities and Other long-term liabilities on the Consolidated Balance Sheets. See Note 15 — Risk Management Activities and Derivative Transactions — Overview of Accounting Treatment and Cash Flow Hedging Strategy for Currency Swaps for more information regarding the currency swap liabilities.

Commodity Contract Derivative Liabilities. TVA enters into certain derivative contracts for natural gas that require physical delivery of the contracted quantity of the commodity as well as certain financial derivative contracts to hedge exposure to the price of natural gas. See Note 15 — Risk Management Activities and Derivative Transactions — Derivatives Not Receiving Hedge Accounting Treatment — Commodity Derivatives and — Commodity Derivatives under the FHP for a discussion of TVA's commodity contract derivatives.

EnergyRight® Financing Obligation. TVA purchases certain loans receivable from its LPCs in association with the EnergyRight® program. The current and long-term portions of the resulting financing obligation are reported in Accounts payable and accrued liabilities and Other long-term liabilities, respectively, on TVA's Consolidated Balance Sheets. At both September 30, 2023 and 2022, the carrying amount of the financing obligation reported in Accounts payable and accrued liabilities was $14 million. See Note 9 — Other Long-Term Assets for information regarding the associated loans receivable.

Long-Term Deferred Compensation. TVA provides compensation arrangements to engage and retain certain employees, both executive and non-executive, which are designed to provide participants with the ability to defer compensation to future periods. The current and long-term portions are recorded in Accounts payable and accrued liabilities and Other long-term liabilities, respectively, on TVA’s Consolidated Balance Sheets. At September 30, 2023 and 2022, the current amount of deferred compensation recorded in Accounts payable and accrued liabilities was $65 million and $53 million, respectively.

Advances for Construction. TVA receives refundable and non-refundable advances for construction that are generally intended to defray all or a portion of the costs of building or extending TVA’s existing power assets. Amounts received are deferred as a liability with the long-term portion representing amounts that will not be recognized within the next 12 months. As projects meet milestones or other contractual obligations, the refundable portion is refunded to the customer and the non-

117

Table of Contents

refundable portion is recognized as contributions in aid of construction and offsets the cost of plant assets. At September 30, 2023 and 2022, the current amount of advances for construction recorded in Accounts payable and accrued liabilities was $39 million and $33 million, respectively.

Long-Term Deferred Revenue. Long-term deferred revenue represents payments received that exceed services rendered resulting in the deferral of revenue. This long-term portion represents amounts that will not be recognized within the next 12 months primarily related to fiber and transmission agreements. The current and long-term portions of the deferral are recorded in Accounts payable and accrued liabilities and Other long-term liabilities, respectively, on TVA’s Consolidated Balance Sheets. At September 30, 2023 and 2022, the current amount of deferred revenue recorded in Accounts payable and accrued liabilities was $21 million and $16 million, respectively.

13. Asset Retirement Obligations

During the year ended September 30, 2023, TVA's total ARO liability increased $327 million.

To estimate its decommissioning obligation related to its nuclear generating stations, TVA uses a probability-weighted, discounted cash flow model which, on a unit-by-unit basis, considers multiple outcome scenarios that include significant estimations and assumptions. Those assumptions include (1) estimates of the cost of decommissioning; (2) the method of decommissioning and the timing of the related cash flows; (3) the license period of the nuclear plant, considering the probability of license extensions; (4) cost escalation factors; and (5) the credit adjusted risk free rate to measure the obligation at the present value of the future estimated costs. TVA has ascribed probabilities to two different decommissioning methods related to its nuclear decommissioning obligation estimate: the DECON method and the SAFSTOR method. The DECON method requires radioactive contamination to be removed from a site and safely disposed of or decontaminated to a level that permits the site to be released for unrestricted use shortly after it ceases operation. The SAFSTOR method allows nuclear facilities to be placed and maintained in a condition that allows the facilities to be safely stored and subsequently decontaminated to levels that permit release for unrestricted use.

TVA also has decommissioning obligations related to its non-nuclear generating sites, ash impoundments, transmission substation and distribution assets, and certain general facilities. To estimate its decommissioning obligation related to these assets, TVA uses estimations and assumptions for the amounts and timing of future expenditures and makes judgments concerning whether or not such costs are considered a legal obligation. Those assumptions include (1) estimates of the costs of decommissioning, (2) the method of decommissioning and the timing of the related cash flows, (3) the expected retirement date of each asset, (4) cost escalation factors, and (5) the credit adjusted risk free rate to measure the obligation at the present value of the future estimated costs. TVA bases its decommissioning estimates for each asset on its identified preferred closure method.

The revisions in non-nuclear estimates increased the liability balance by $362 million for the year ended September 30, 2023. During the year coal combustion residuals ("CCR") closure liabilities at Bull Run, Johnsonville, and Cumberland increased $458 million due to revised cost estimates for final closure activities based on TVA's current approved closure strategies at these sites. Partially offsetting these increases, expected reductions in CCR post-closure costs for long-term monitoring at Gallatin resulted in a decrease of $60 million. In addition, CCR closure liabilities at Cumberland decreased $15 million due to identified changes in the projected timing of certain asset retirement activities, and CCR closure liabilities at Paradise decreased $9 million based on refined project cost estimates.

The revisions in non-nuclear estimates increased $186 million for the year ended September 30, 2022. During the year, TVA completed an engineering review of its cost estimates for closure of certain areas containing coal fines at Paradise Fossil Plant ("Paradise"), which resulted in an increase of $119 million due to expected cost increases for necessary changes in activities associated with proper completion of the closure. CCR closure liabilities at Paradise and Cumberland increased $82 million due to new vendor bids, modified closure designs, and revised estimates for construction costs. Refined project cost assumptions and scope changes related to TVA's AROs for the closure of certain coal yards at its fossil plants resulted in an increase of $57 million. In addition, effective October 1, 2022, TVA implemented revised depreciation rates applicable to its completed plant due to the results of a new depreciation study. The study included a decline in the service life estimates of TVA's coal-fired plants based on current planning assumptions to potentially retire the remainder of the coal-fired fleet by 2035. As a result of the change in service life estimates reflected in the depreciation study, TVA performed an assessment of the assumptions used in the timing of cash flows related to its non-nuclear AROs. Based on the assessment, TVA increased AROs by $47 million due to identified changes in the projections of timing of certain asset retirement activities. Partially offsetting these increases, expected reductions in CCR post-closure costs for maintenance and monitoring at Paradise, Shawnee, and Colbert Fossil Plant ("Colbert") resulted in a decrease of $53 million. CCR closure liabilities at Gallatin decreased $30 million due to selection of a new vendor bid and changes to anticipated timing of certain asset retirement activities. In addition, CCR closure liabilities at Allen Fossil Plant decreased $15 million as a result of changes in cost estimates and anticipated timing of various retirement activities.

The revisions in nuclear estimates increased the liability balance by $61 million for the year ended September 30, 2022. This was primarily due to approval and implementation of the most recent site-specific cost study in September 2022 resulting in an increase of $58 million.

118

Table of Contents

Additionally, during the years ended September 30, 2023 and 2022, both the nuclear and non-nuclear liabilities were increased by periodic accretion, partially offset by settlement projects that were conducted during these periods. The nuclear and non-nuclear accretion amounts were deferred as regulatory assets. During 2023, 2022, and 2021, $188 million, $137 million, and $72 million, respectively, of the related regulatory assets were amortized into expense as these amounts were collected in rates. See Note 10 — Regulatory Assets and Liabilities. TVA maintains investment trusts to help fund its decommissioning obligations. See Note 16 — Fair Value Measurements — Investment Funds and Note 22 — Commitments and Contingencies — Contingencies — Decommissioning Costs for a discussion of the trusts' objectives and the current balances of the trusts.


Asset Retirement Obligation Activity (in millions)
	Nuclear		Non-Nuclear		Total
Balance at September 30, 2021	$	3,428	$	3,574	$	7,002
Settlements	(2)		(309)		(311)
Revisions in estimate	61		186		247


Accretion (recorded as regulatory asset)	156		68		224

Balance at September 30, 2022	3,643		3,519		7,162		(1)

Settlements	(8)		(271)		(279)
Revisions in estimate	7		362		369


Accretion (recorded as regulatory asset)	166		71		237

Balance at September 30, 2023	$	3,808	$	3,681	$	7,489	(1)

Note

(1) Includes $272 million and $275 million at September 30, 2023 and 2022, respectively, in Current liabilities.

14. Debt and Other Obligations

General

The TVA Act authorizes TVA to issue Bonds in an amount not to exceed $30.0 billion at any time. At September 30, 2023, TVA had only two types of Bonds outstanding: power bonds and discount notes. Power bonds have maturities between one year and 50 years, and discount notes have maturities of less than one year. Power bonds and discount notes are both issued pursuant to Section 15d of the TVA Act and pursuant to the Basic Tennessee Valley Authority Power Bond Resolution adopted by the TVA Board on October 6, 1960, as amended on September 28, 1976, October 17, 1989, and March 25, 1992 (the "Basic Resolution"). Bonds are not obligations of the U.S., and the U.S. does not guarantee the payments of principal or interest on Bonds.

Power bonds and discount notes rank on parity and have first priority of payment from net power proceeds, which are defined as the remainder of TVA's gross power revenues after deducting the costs of operating, maintaining, and administering its power properties and tax equivalent payments, but before deducting depreciation accruals or other charges representing the amortization of capital expenditures, plus the net proceeds from the sale or other disposition of any power facility or interest therein.

TVA considers its scheduled payments under its lease financing arrangements involving John Sevier CCF and Southaven CCF as costs of operating, maintaining, and administering its power properties. Costs of operating, maintaining, and administering TVA's power properties have priority over TVA's payments on the Bonds. Once net power proceeds have been applied to payments on power bonds and discount notes as well as any other Bonds that TVA may issue in the future that rank on parity with or subordinate to power bonds and discount notes, Section 2.3 of the Basic Resolution provides that the remaining net power proceeds shall be used only for (1) minimum payments into the U.S. Treasury required by the TVA Act as repayment of, and as a return on, the Power Program Appropriation Investment; (2) investment in power system assets; (3) additional reductions of TVA's capital obligations; and (4) other lawful purposes related to TVA's power business.

The TVA Act and the Basic Resolution each contain two bond tests: the rate test and the bondholder protection test. Under the rate test, TVA must charge rates for power which will produce gross revenues sufficient to provide funds for, among other things, debt service on outstanding Bonds. As of September 30, 2023, TVA was in compliance with the rate test. See Note 1 — Summary of Significant Accounting Policies — General. Under the bondholder protection test, TVA must, in successive five-year periods, use an amount of net power proceeds at least equal to the sum of (1) the depreciation accruals and other charges representing the amortization of capital expenditures and (2) the net proceeds from any disposition of power facilities for either the reduction of its capital obligations (including Bonds and the Power Program Appropriation Investment) or investment in power assets. TVA met the bondholder protection test for the five-year period ended September 30, 2020, and must next meet the bondholder protection test for the five-year period ending September 30, 2025.

119

Table of Contents

Secured Debt of VIEs

On August 9, 2013, SCCG issued secured notes totaling $360 million that bear interest at a rate of 3.846 percent. The SCCG notes require amortizing semi-annual payments on each February 15 and August 15, and mature on August 15, 2033. Also on August 9, 2013, SCCG issued $40 million of membership interests subject to mandatory redemption. The proceeds from the secured notes issuance and the issuance of the membership interests were paid to TVA in accordance with the terms of the Southaven head lease. See Note 11 — Variable Interest Entities — Southaven VIE. TVA used the proceeds from the transaction primarily to fund the acquisition of the Southaven CCF from SSSL.

On January 17, 2012, JSCCG issued secured notes totaling $900 million in aggregate principal amount that bear interest at a rate of 4.626 percent. Also on January 17, 2012, Holdco issued secured notes totaling $100 million that bear interest at a rate of 7.1 percent. The JSCCG notes and the Holdco notes require amortizing semi-annual payments on each January 15 and July 15, and mature on January 15, 2042. The Holdco notes require a $10 million balloon payment upon maturity. See Note 11 — Variable Interest Entities — John Sevier VIEs. TVA used the proceeds from the transaction to meet its requirements under the TVA Act.

Secured debt of VIEs, including current maturities, outstanding at September 30, 2023 and 2022 totaled $968 million and $1.0 billion, respectively.

Short-Term Debt

The following table provides information regarding TVA's short-term borrowings:


Short-Term Borrowings At September 30
	2023			2022
Gross amount outstanding - discount notes (in millions)	$	432		$	1,173

Weighted average interest rate - discount notes	5.29		%	2.93		%

Put Options

TVA has two issues of Putable Automatic Rate Reset Securities ("PARRS") outstanding. After a fixed-rate period of five years, the coupon rate on the PARRS may automatically be reset downward under certain market conditions on an annual basis. The coupon rate reset on the PARRS is based on a calculation. For both series of PARRS, the coupon rate will reset downward on the reset date if the rate calculated is below the then-current coupon rate on the Bond. The calculation dates, potential reset dates, and terms of the calculation are different for each series. The coupon rate on the 1998 Series D PARRS may be reset on June 1 (annually) if the sum of the five-day average of the 30-Year Constant Maturity Treasury ("CMT") rate for the week ending the last Friday in April, plus 94 basis points, is below the then-current coupon rate. The coupon rate on the 1999 Series A PARRS may be reset on May 1 (annually) if the sum of the five-day average of the 30-Year CMT rate for the week ending the last Friday in March, plus 84 basis points, is below the then-current coupon rate. The coupon rates may only be reset downward, but investors may request to redeem their Bonds at par value in conjunction with a coupon rate reset for a limited period of time prior to the reset dates under certain circumstances.

The coupon rate for the 1998 Series D PARRS, which mature in June 2028, has been reset eight times, from an initial rate of 6.750 percent to the current rate of 2.134 percent. In connection with these resets, $318 million of the Bonds have been redeemed; therefore, $256 million of the Bonds were outstanding at September 30, 2023. The coupon rate for the 1999 Series A PARRS, which mature in May 2029, has been reset seven times, from an initial rate of 6.50 percent to the current rate of 2.216 percent. In connection with these resets, $316 million of the Bonds have been redeemed; therefore, $208 million of the Bonds were outstanding at September 30, 2023.

Due to the contingent nature of the put option on the PARRS, TVA determines whether the PARRS should be classified as long-term debt or current maturities of long-term debt by calculating the expected reset rate for the Bonds on the calculation dates, described above. If the determination date for reset is before the balance sheet date of the reporting period and the expected reset rate is less than the then-current coupon rate on the PARRS, the PARRS are included in current maturities. Otherwise, the PARRS are included in long-term debt.

120

Table of Contents

Debt Securities Activity

The table below summarizes the long-term debt securities activity for the years ended September 30, 2023 and 2022.


Debt Securities Activity For the years ended September 30 (in millions)
	2023		2022
Issues







2022 Series A(1)	$	—	$	500
2023 Series A(2)	1,000		—
Discount on debt issues	(8)		(16)
Total	$	992	$	484





Redemptions/Maturities(3)






2009 Series B	$	29	$	28
2012 Series A	—		1,000

Total redemptions/maturities of power bonds	29		1,028

Debt of variable interest entities	39		43
Total redemptions/maturities of debt	$	68	$	1,071

Notes

(1) The 2022 Series A Bonds were issued at 96.786 percent of par.

(2) The 2023 Series A Bonds were issued at 99.187 percent of par.

(3) All redemptions were at 100 percent of par.

Debt Outstanding

Total debt outstanding at September 30, 2023 and 2022, consisted of the following:


Short-Term Debt At September 30 (in millions)
CUSIP or Other Identifier	Maturity	Coupon Rate	2023		2022
Short-term debt, net of discounts			$	432	$	1,172
Current maturities of long-term debt of VIEs issued at par			35		39

Current maturities of power bonds issued at par



880591EF5	12/15/2023	3.770%	1		1
880591EF5	6/15/2024	3.770%	21		28
880591ER9	9/15/2024	2.875%	1,000		—





Total current maturities of power bonds issued at par			1,022		29
Total current debt outstanding, net			$	1,489	$	1,240

121

Table of Contents


Long-Term Debt At September 30 (in millions)
CUSIP or Other Identifier	Maturity	Coupon Rate		2023 Par			2022 Par			Stock Exchange Listings






880591ER9	9/15/2024	2.875%		$	—		$	1,000		New York
880591EW8	5/15/2025	0.750%		1,000			1,000			New York
880591CJ9	11/1/2025	6.750%		1,350			1,350			New York, Hong Kong, Luxembourg, Singapore
880591EU2	2/1/2027	2.875%		1,000			1,000			New York
880591300(3)	6/1/2028	2.134%		256			256			New York
880591409(3)	5/1/2029	2.216%		208			208			New York
880591DM1	5/1/2030	7.125%		1,000			1,000			New York, Luxembourg
880591EX6	9/15/2031	1.500%		500			500			New York
880591DP4	6/7/2032	6.587%	(2)	305		(1)	279		(1)	New York, Luxembourg
880591DV1	7/15/2033	4.700%		472			472			New York, Luxembourg
880591EF5	6/15/2034	3.770%		139			160			None
880591DX7	6/15/2035	4.650%		436			436			New York
880591CK6	4/1/2036	5.980%		121			121			New York
880591CS9	4/1/2036	5.880%		1,500			1,500			New York
880591CP5	1/15/2038	6.150%		1,000			1,000			New York
880591ED0	6/15/2038	5.500%		500			500			New York
880591EH1	9/15/2039	5.250%		2,000			2,000			New York
880591EP3	12/15/2042	3.500%		1,000			1,000			New York
880591DU3	6/7/2043	4.962%	(2)	183		(1)	168		(1)	New York, Luxembourg

880591EB4	1/15/2048	4.875%		500			500			New York, Luxembourg
880591DZ2	4/1/2056	5.375%		1,000			1,000			New York
880591EJ7	9/15/2060	4.625%		1,000			1,000			New York
880591ES7	9/15/2065	4.250%		1,000			1,000			New York
880591EY4	9/15/2052	4.250%		500			500			New York
880591EZ1	3/15/2028	3.875%		1,000			—			New York


Subtotal				17,970			17,950
Unamortized discounts, premiums, issue costs, and other				(126)			(124)
Total long-term outstanding power bonds, net				17,844			17,826
Long-term debt of VIEs, net				933			968

Total long-term debt, net				$	18,777		$	18,794

Notes

(1) Includes total net exchange gain from currency transactions of $109 million and $150 million at September 30, 2023 and 2022, respectively.

(2) The coupon rate represents TVA's effective interest rate.

(3) TVA PARRS, CUSIP numbers 880591300 and 880591409, may be redeemed under certain conditions. See Put Options above.


Maturities Due in the Year Ending September 30 (in millions)
	2024		2025		2026		2027		2028		Thereafter		Total
Long-term power bonds including current maturities(1)	$	1,022	$	1,022	$	1,370	$	1,020	$	1,272	$	13,395	$	19,101

Short-term debt(2)	432		—		—		—		—		—		432

Notes

(1) Long-term power bonds do not include non-cash items of foreign currency exchange gain of $109 million, unamortized debt issue costs of $41 million, or net

122

Table of Contents

discount on sale of Bonds of $85 million.

(2) Short-term debt does not include the non-cash item of discount on issuance of discount notes of less than $1 million.

Credit Facility Agreements

TVA has funding available under four long-term revolving credit facilities totaling $2.7 billion. See the table below for additional information on the four long-term revolving credit facilities. The interest rate on any borrowing under these facilities varies based on market factors and the rating of TVA's senior unsecured, long-term, non-credit-enhanced debt. TVA is required to pay an unused facility fee on the portion of the total $2.7 billion that TVA has not borrowed or committed under letters of credit. This fee, along with letter of credit fees, may fluctuate depending on the rating of TVA's senior unsecured, long-term, non-credit-enhanced debt. At September 30, 2023 and 2022, there were $535 million and $704 million, respectively, of letters of credit outstanding under these facilities, and there were no borrowings outstanding. TVA's letters of credit are primarily posted as collateral under TVA's interest rate swaps. See Note 15 — Risk Management Activities and Derivative Transactions — Other Derivative Instruments — Collateral. TVA may also post collateral for TVA's currency swaps, for commodity derivatives under the Financial Hedging program ("FHP"), or for certain transactions with third parties that require TVA to post letters of credit.

The following table provides additional information regarding TVA's funding available under the four long-term revolving credit facilities:


Summary of Long-Term Credit Facilities At September 30, 2023 (in millions)
Maturity Date	Facility Limit		Letters of Credit Outstanding		Cash Borrowings		Availability

February 2025	$	500	$	302	$	—	$	198
March 2026	150		38		—		112
September 2026	1,000		99		—		901
March 2027	1,000		96		—		904
Total	$	2,650	$	535	$	—	$	2,115

TVA and the U.S. Treasury, pursuant to the TVA Act, have entered into a memorandum of understanding under which the U.S. Treasury provides TVA with a $150 million credit facility. This credit facility was renewed for 2024 with a maturity date of September 30, 2024. Access to this credit facility or other similar financing arrangements with the U.S. Treasury has been available to TVA since the 1960s. TVA can borrow under the U.S. Treasury credit facility only if it cannot issue Bonds in the market on reasonable terms, and TVA considers the U.S. Treasury credit facility a secondary source of liquidity. The interest rate on any borrowing under this facility is based on the average rate on outstanding marketable obligations of the U.S. with maturities from date of issue of 12 months or less. There were no outstanding borrowings under the facility at September 30, 2023. The availability of this credit facility may be impacted by how the U.S. government addresses the possibility of approaching its debt limit.

Lease/Leasebacks

TVA previously entered into leasing transactions to obtain third-party financing for 24 peaking CTs as well as certain qualified technological equipment and software ("QTE"). Due to TVA's continuing involvement with the combustion turbine facilities and the QTE during the leaseback term, TVA accounted for the lease proceeds as financing obligations. There were no outstanding leaseback obligations related to the remaining CTs and QTE at September 30, 2023 and 2022. Prior to 2021, TVA made final rent payments involving 16 CTs and acquired the equity interest related to these transactions. Rent payments under the remaining CT lease/leaseback transactions were made through January 2022. In December 2021, TVA gave notice of its election to acquire the leasehold interests related to the remaining eight CTs for a total of $155 million. One associated acquisition closed in December 2022 for $78 million, and the other acquisition closed in May 2023 for $77 million. As a result, TVA recorded the cash consideration as reacquired rights, which is an intangible asset included in Completed plant on the Consolidated Balance Sheet. The amount will be amortized over the remaining estimated useful life of the underlying CTs. TVA recognized $3 million of amortization expense related to the reacquired rights within the Consolidated Statements of Operations for the year ended September 30, 2023. Transaction costs were not material. The estimated amortization expense will be $5 million annually from 2024 through 2052. The estimated amortization expense will be $2 million in 2053.

15. Risk Management Activities and Derivative Transactions

TVA is exposed to various risks related to commodity prices, investment prices, interest rates, currency exchange rates, and inflation as well as counterparty credit and performance risks. To help manage certain of these risks, TVA has historically entered into various derivative transactions, principally commodity option contracts, forward contracts, swaps, swaptions, futures, and options on futures. Other than certain derivative instruments in its trust investment funds, it is TVA's policy to enter into these derivative transactions solely for hedging purposes and not for speculative purposes.

123

Table of Contents

Overview of Accounting Treatment

TVA recognizes certain of its derivative instruments as either assets or liabilities on its Consolidated Balance Sheets at fair value. The accounting for changes in the fair value of these instruments depends on (1) whether TVA uses regulatory accounting to defer the derivative gains and losses, (2) whether the derivative instrument has been designated and qualifies for hedge accounting treatment, and (3) if so, the type of hedge relationship (for example, cash flow hedge).

The following tables summarize the accounting treatment that certain of TVA's financial derivative transactions receive:


Summary of Derivative Instruments That Receive Hedge Accounting Treatment (part 1) Amount of Mark-to-Market Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) For the years ended September 30 (in millions)
Derivatives in Cash Flow Hedging Relationship	Objective of Hedge Transaction	Accounting for Derivative Hedging Instrument	2023		2022
Currency swaps	To protect against changes in cash flows caused by changes in foreign currency exchange rates (exchange rate risk)	Unrealized gains and losses are recorded in AOCI and reclassified to Interest expense to the extent they are offset by gains and losses on the hedged transaction	$	99	$	(157)


Summary of Derivative Instruments That Receive Hedge Accounting Treatment (part 2)(1) Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) to Interest Expense For the years ended September 30
Derivatives in Cash Flow Hedging Relationship	2023		2022
Currency swaps	$	42	$	(93)

Note

(1) There were no amounts excluded from effectiveness testing for any of the periods presented. Based on forecasted foreign currency exchange rates, TVA expects to reclassify approximately $20 million of gains from AOCI to Interest expense within the next 12 months to offset amounts anticipated to be recorded in Interest expense related to the forecasted exchange loss on the debt.


Summary of Derivative Instruments That Do Not Receive Hedge Accounting Treatment Amount of Gain (Loss) Recognized in Income on Derivatives(1) For the years ended September 30 (in millions)

Derivative Type	Objective of Derivative	Accounting for Derivative Instrument	2023		2022
Interest rate swaps	To fix short-term debt variable rate to a fixed rate (interest rate risk)	Mark-to-market gains and losses are recorded as regulatory liabilities and assets, respectively Realized gains and losses are recognized in Interest expense when incurred during the settlement period and are presented in operating cash flow	$	(45)	$	(103)



Commodity derivatives under the FHP	To protect against fluctuations in market prices of purchased commodities (price risk)	Mark-to-market gains and losses are recorded as regulatory liabilities and assets, respectively Realized gains and losses are recognized in Fuel expense or Purchased power expense as the contracts settle to match the delivery period of the underlying commodity(2)	(348)		47

Notes

(1) All of TVA's derivative instruments that do not receive hedge accounting treatment have unrealized gains (losses) that would otherwise be recognized in income but instead are deferred as regulatory liabilities and assets. As such, there were no related gains (losses) recognized in income for these unrealized gains (losses) for the years ended September 30, 2023 and 2022.

(2) Of the amount recognized in 2023, $301 million and $47 million were reported in Fuel expense and Purchased power expense, respectively. Of the amount recognized in 2022, $38 million and $9 million were reported in Fuel expense and Purchased power expense, respectively.

124

Table of Contents

Fair Values of TVA Derivatives

At September 30

(in millions)

2023

2022

Derivatives That Receive Hedge Accounting Treatment:

Balance

Balance Sheet Presentation

Balance

Balance Sheet Presentation

Currency swaps

£250 million Sterling

(72)

Accounts payable and accrued liabilities $(6); Other long-term liabilities $(66)

(130)

Accounts payable and accrued liabilities $(7); Other long-term liabilities $(123)

£150 million Sterling

(69)

Accounts payable and accrued liabilities $(4); Other long-term liabilities $(65)

(110)

Accounts payable and accrued liabilities $(5); Other long-term liabilities $(105)

Derivatives That Do Not Receive Hedge Accounting Treatment:

Balance

Balance Sheet Presentation

Balance

Balance Sheet Presentation

Interest rate swaps

$1.0 billion notional

(499)

Other current assets $1; Accrued interest $(27); Other long-term liabilities $(473)

(672)

Accounts payable and

accrued liabilities $(9); Accrued interest $(33);

Other long-term liabilities

$(630)

$476 million notional

(159)

Other current assets $3; Accrued interest $(8); Other long-term liabilities $(154)

(233)

Accounts payable and

accrued liabilities $(3); Accrued interest $(9);

Other long-term liabilities

$(221)

Commodity contract derivatives

Other current assets $21; Other long-term assets $12; Accounts payable and accrued liabilities $(1); Other long-term liabilities $(1)

145

Other current assets $118; Other long-term assets $34; Accounts payable and accrued liabilities $(6); Other long-term liabilities $(1)

Commodity derivatives under the FHP

(186)

Accounts payable and accrued liabilities $(135); Other long-term liabilities $(51)

115

Accounts receivable, net $1; Other current assets $54; Other long-term assets $68; Accounts payable and accrued liabilities $(8)

Cash Flow Hedging Strategy for Currency Swaps

To protect against exchange rate risk related to British pound sterling denominated Bond transactions, TVA entered into foreign currency hedges at the time the Bond transactions occurred. TVA had the following currency swaps outstanding at September 30, 2023:


Currency Swaps Outstanding
Effective Date of Currency Swap Contract	Associated TVA Bond Issues Currency Exposure	Expiration Date of Swap	Overall Effective Cost to TVA
2001	£250 million	2032	6.587%
2003	£150 million	2043	4.962%

When the dollar strengthens against the British pound sterling, the exchange gain on the Bond liability and related accrued interest is offset by an equal amount of loss on the swap contract that is reclassified out of AOCI. Conversely, the exchange loss on the Bond liability and related accrued interest is offset by an equal amount of gain on the swap contract that is reclassified out of AOCI. All such exchange gains or losses on the Bond liability and related accrued interest are included in Long-term debt, net and Accrued interest, respectively. The offsetting exchange losses or gains on the swap contracts are recognized in AOCI. If any gain (loss) were to be incurred as a result of the early termination of the foreign currency swap contract, the resulting income (expense) would be amortized over the remaining life of the associated Bond as a component of Interest expense. The values of the currency swap liabilities are included in Accounts payable and accrued liabilities and Other long-term liabilities on the Consolidated Balance Sheets.

125

Table of Contents

Derivatives Not Receiving Hedge Accounting Treatment

Interest Rate Derivatives. Generally TVA uses interest rate swaps to fix variable short-term debt to a fixed rate, and TVA uses regulatory accounting treatment to defer the MtM gains and losses on its interest rate swaps. The net deferred unrealized gains and losses are classified as regulatory liabilities or assets on TVA's Consolidated Balance Sheets and are included in the ratemaking formula when gains or losses are realized. The values of these derivatives are included in Other current assets, Accounts payable and accrued liabilities, Accrued interest, and Other long-term liabilities on the Consolidated Balance Sheets, and realized gains and losses, if any, are included on TVA's Consolidated Statements of Operations. For the years ended September 30, 2023 and 2022, the changes in fair market value of the interest rate swaps resulted in the reduction in unrealized losses of $240 million and $728 million, respectively. TVA may hold short-term debt balances lower than the notional amount of the interest rate swaps from time to time due to changes in business conditions and other factors. While actual balances vary, TVA generally plans to maintain average balances of short-term debt equal to or in excess of the combined notional amount of the interest rate swaps.

Commodity Derivatives. TVA enters into certain derivative contracts for natural gas that require physical delivery of the contracted quantity of the commodity. TVA may also enter into short-term PPAs with a term of less than one year that provide an option to financially settle contracted power deliveries. This option creates an embedded derivative in the hosting power purchase agreement. TVA marks to market these contracts and defers the unrealized gains (losses) as regulatory liabilities (assets). At September 30, 2023, TVA's natural gas contract derivatives had terms of up to three years.


Commodity Contract Derivatives At September 30
	2023				2022
	Number of Contracts	Notional Amount	Fair Value (MtM) (in millions)		Number of Contracts	Notional Amount	Fair Value (MtM) (in millions)

Natural gas contract derivatives	54	318 million mmBtu	$	31	44	296 million mmBtu	$	145

Commodity Derivatives under the FHP. In 2022, the FHP was reinstated, and hedging activity began under the program in the second quarter of 2022. Currently, TVA is hedging exposure to the price of natural gas under the FHP. There is no Value at Risk aggregate transaction limit under the current FHP structure, but the TVA Board reviews and authorizes the use of tolerances and measures annually. TVA's FHP policy prohibits trading financial instruments under the FHP for speculative purposes. At September 30, 2023, TVA's natural gas swap contracts under the FHP had remaining terms of up to five years.


Commodity Derivatives under Financial Hedging Program(1) At September 30
	2023					2022
	Number of Contracts	Notional Amount		Fair Value (MtM) (in millions)		Number of Contracts	Notional Amount		Fair Value (MtM) (in millions)
Natural gas

Swap contracts	221	388	million mmBtu	$	(186)	225	256	million mmBtu	$	115

Note

(1) Fair value amounts presented are based on the net commodity position with the counterparty. Notional amounts disclosed represent the net value of contractual amounts.

TVA defers all FHP unrealized gains (losses) as regulatory liabilities (assets) and records the realized gains or losses in Fuel expense and Purchased power expense to match the delivery period of the underlying commodity. The fair value of commodity derivatives under the FHP decreased $301 million primarily due to a decrease in forward natural gas prices at September 30, 2023 as compared to September 30, 2022.

126

Table of Contents

Offsetting of Derivative Assets and Liabilities

The amounts of TVA's derivative instruments as reported on the Consolidated Balance Sheets are shown in the table below:


Derivative Assets and Liabilities(1) At September 30 (in millions)

	2023		2022
Assets
Interest rate swaps	$	4	$	—
Commodity contract derivatives	33		152
Commodity derivatives under the FHP(2)	—		123
Total derivatives subject to master netting or similar arrangement	$	37	$	275




Liabilities
Currency swaps	$	141	$	240
Interest rate swaps(3)	662		905
Commodity contract derivatives	2		7
Commodity derivatives under the FHP(2)	186		8
Total derivatives subject to master netting or similar arrangement	$	991	$	1,160

Notes

(1) Offsetting amounts include counterparty netting of derivative contracts. Except as discussed below, there were no other material offsetting amounts on TVA's Consolidated Balance Sheets at either September 30, 2023 or 2022.

(2) At September 30, 2023, the gross derivative asset and gross derivative liability was $26 million and $212 million, respectively, with offsetting amounts for each totaling $26 million.

(3) Letters of credit of approximately $509 million and $704 million were posted as collateral at September 30, 2023 and 2022, respectively, to partially secure the liability positions of one of the interest rate swaps in accordance with the collateral requirements for this derivative.

Other Derivative Instruments

Investment Fund Derivatives. Investment funds consist primarily of funds held in the NDT, ART, SERP, DCP, and RP. See Note 16 — Fair Value Measurements — Investment Funds for a discussion of the trusts, plans, and types of investments. The NDT and ART may invest in derivative instruments which may include swaps, futures, options, forwards, and other instruments. At September 30, 2023 and 2022, the NDT held investments in forward contracts to purchase debt securities. The fair values of these derivatives were in net asset positions totaling $11 million and $4 million at September 30, 2023 and 2022, respectively.

Collateral. TVA's interest rate swaps, currency swaps, and commodity derivatives under the FHP contain contract provisions that require a party to post collateral (in a form such as cash or a letter of credit) when the party's liability balance under the agreement exceeds a certain threshold. At September 30, 2023, the aggregate fair value of all derivative instruments with credit-risk related contingent features that were in a liability position was $987 million. TVA's collateral obligations at September 30, 2023, under these arrangements were $429 million, for which TVA had posted $509 million in letters of credit. These letters of credit reduce the available balance under the related credit facilities. TVA's assessment of the risk of its nonperformance includes a reduction in its exposure under the interest rate swap contracts as a result of this posted collateral.

For all of its derivative instruments with credit-risk related contingent features:

•If TVA remains a majority-owned U.S. government entity but Standard & Poor's Financial Services, LLC ("S&P") or Moody's Investors Service, Inc. ("Moody's") downgrades TVA's credit rating to AA or Aa2, respectively, TVA's collateral obligations would likely increase by $22 million, and

•If TVA ceases to be majority-owned by the U.S. government, TVA's credit rating would likely be downgraded and TVA would be required to post additional collateral.

Counterparty Risk

TVA may be exposed to certain risks when a counterparty has the potential to fail to meet its obligations in accordance with agreed terms. These risks may be related to credit, operational, or nonperformance matters. To mitigate certain counterparty risk, TVA analyzes the counterparty's financial condition prior to entering into an agreement, establishes credit limits, monitors the appropriateness of those limits, as well as any changes in the creditworthiness of the counterparty, on an ongoing basis, and when required, employs credit mitigation measures, such as collateral or prepayment arrangements and master purchase and sale agreements.

127

Table of Contents

Customers. TVA is exposed to counterparty credit risk associated with trade accounts receivable from delivered power sales to LPCs, and from industries and federal agencies directly served, all located in the Tennessee Valley region. Of the $1.6 billion and $1.9 billion of receivables from power sales outstanding at September 30, 2023 and 2022, respectively, nearly all counterparties were rated investment grade. The obligations of customers that are not investment grade are secured by collateral. TVA is also exposed to risk from exchange power arrangements with a small number of investor-owned regional utilities related to either delivered power or the replacement of open positions of longer-term purchased power or fuel agreements. TVA believes its policies and procedures for counterparty performance risk reviews have generally protected TVA against significant exposure related to market and economic conditions. See Note 1 — Summary of Significant Accounting Policies — Allowance for Uncollectible Accounts, Note 3 — Accounts Receivable, Net, and Note 9 — Other Long-Term Assets.

TVA had revenue from two LPCs that collectively accounted for 17 percent of total operating revenues for both the years ended September 30, 2023 and 2022.

Suppliers. TVA assesses potential supplier performance risks, including procurement of fuel, parts, and services. If suppliers are unable to perform under TVA's existing contracts or if TVA is unable to obtain similar services or supplies from other vendors, TVA could experience delays, disruptions, additional costs, or other operational outcomes that may impact generation, maintenance, and capital programs. If certain fuel or purchased power suppliers fail to perform under the terms of their contract with TVA, TVA might lose the money that it paid to the supplier under the contract and have to purchase replacement fuel or power on the spot market, perhaps at a significantly higher price than TVA was entitled to pay under the contract. In addition, TVA might not be able to acquire replacement fuel or power in a timely manner and thus might be unable to satisfy its own obligations to deliver power. TVA continues evaluating potential supplier performance risks and supplier impact but cannot determine or predict the duration of such risks/impacts or the extent to which such risks/impacts could affect TVA's business, operations, and financial results or cause potential business disruptions.

TVA continues to experience impacts due to inflation, supply chain material challenges, and labor availability. This has led to project delays, limited availability, and/or price increases for supplies and labor. TVA has been able to manage these challenges with limited business disruptions at this time; however, should pressures continue long term, TVA could experience more significant disruptions and pressure to increase power rates.

Natural Gas and Fuel Oil. TVA purchases a significant amount of its natural gas requirements through contracts with a variety of suppliers and purchases substantially all of its fuel oil requirements on the spot market. TVA delivers to its gas fleet under firm and non-firm transportation contracts on multiple interstate natural gas pipelines. TVA contracts for storage capacity that allows for operational flexibility and increased supply during peak gas demand scenarios or supply disruptions. TVA plans to continue using contracts of various lengths and terms to meet the projected natural gas needs of its natural gas fleet. TVA also maintains on-site, fuel oil backup to operate at the majority of the combustion turbine sites in the event of major supply disruptions. In the event suppliers are unable to perform under existing contracts, TVA can utilize its storage portfolio or other suppliers to help secure replacement natural gas volumes.

Coal. To help ensure a reliable supply of coal, TVA had coal contracts with multiple suppliers at September 30, 2023. The contracted supply of coal is sourced from several geographic regions of the U.S. and is delivered via barge and rail. As a result of emerging technologies, environmental regulations, industry trends, and natural gas market volatility over the past few years, coal suppliers are facing increased financial pressure, which has led to relatively poor credit ratings and bankruptcies, restructuring, mine closures, or other scenarios. A long-term continued decline in demand for coal could result in more consolidations, additional bankruptcies, restructuring, mine closures, or other scenarios.

Nuclear Fuel. Nuclear fuel is obtained predominantly through long-term uranium concentrate supply contracts, contracted conversion services, contracted enrichment services, or a combination thereof, and contracted fuel fabrication services. The supply markets for uranium concentrates and certain nuclear fuel services are subject to price fluctuations and availability restrictions. Supply market conditions may make procurement contracts subject to credit risk related to the potential nonperformance of counterparties. In the event of nonperformance by these or other suppliers, TVA believes that replacement uranium concentrate and nuclear fuel services can be obtained, although at prices that may be unfavorable when compared to the prices under the current supply agreements.

As a result of Russia’s invasion of Ukraine, new contracts for Russian origin nuclear fuel have been limited by Executive Order 14066, and further restrictions on the purchase or use of Russian origin fuel may be forthcoming. TVA should have no direct impact from existing or future restrictions since TVA has no Russian origin nuclear fuel in inventory for use in its reactors and it is not contracted to purchase any Russian origin nuclear fuel. TVA could be impacted by higher market prices as a result of general market impacts associated with supply restrictions; however, at this time TVA's nuclear fuel is obtained predominantly through long-term contracts.

Purchased Power. TVA acquires power from a variety of power producers through long-term and short-term PPAs as well as through spot market purchases. Because of the long-term nature and reliability of purchased power, TVA requires that the PPAs contain certain counterparty performance assurance requirements to help insure counterparty performance during the term of the agreements.

128

Table of Contents

Other Suppliers. Mounting solar supply chain constraints, commodity price increases, and the recent trade policy investigation into solar panel imports have created challenges for the U.S. solar industry. Both TVA's Self-Directed Solar project and TVA's existing solar PPA portfolio are not immune from these challenges. Similar to the experience of the rest of the industry, the majority of TVA's contracted PPAs from previous requests for proposals ("RFPs") that are not yet online have been impacted by project delays and price increases, and TVA terminated one PPA because of counterparty default.

Derivative Counterparties. TVA has entered into physical and financial contracts that are classified as derivatives for hedging purposes, and TVA's NDT, ART, and qualified defined benefit plan ("pension plan") have entered into derivative contracts for investment purposes. If a counterparty to one of the physical or financial derivative transactions defaults, TVA might incur costs in connection with entering into a replacement transaction. If a counterparty to the derivative contracts into which the NDT, the ART, or the pension plan have entered for investment purposes defaults, the value of the investment could decline significantly or perhaps become worthless. TVA has concentrations of credit risk from the banking, coal, and gas industries because multiple companies in these industries serve as counterparties to TVA in various derivative transactions. At September 30, 2023, all of TVA's commodity derivatives under the FHP, currency swaps, interest rate swaps, and PPAs with option to settle were with counterparties whose Moody's credit ratings were A2 or higher. TVA classifies forward natural gas contracts as derivatives. At September 30, 2023, the forward natural gas contracts were with counterparties whose ratings ranged from B1 to A1.

16. Fair Value Measurements

Fair value is determined based on the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the asset or liability's principal market, or in the absence of a principal market, the most advantageous market for the asset or liability in an orderly transaction between market participants. TVA uses market or observable inputs as the preferred source of values, followed by assumptions based on hypothetical transactions in the absence of market inputs.

Valuation Techniques

The measurement of fair value results in classification into a hierarchy by the inputs used to determine the fair value as follows:


Level 1	—	Unadjusted quoted prices in active markets accessible by the reporting entity for identical assets or liabilities. Active markets are those in which transactions for the asset or liability occur with sufficient frequency and volume to provide pricing.
Level 2	—	Pricing inputs other than quoted market prices included in Level 1 that are based on observable market data and that are directly or indirectly observable for substantially the full term of the asset or liability. These include quoted market prices for similar assets or liabilities, quoted market prices for identical or similar assets in markets that are not active, adjusted quoted market prices, inputs from observable data such as interest rate and yield curves, volatilities and default rates observable at commonly quoted intervals, and inputs derived from observable market data by correlation or other means.
Level 3	—	Pricing inputs that are unobservable, or less observable, from objective sources. Unobservable inputs are only to be used to the extent observable inputs are not available. These inputs maintain the concept of an exit price from the perspective of a market participant and should reflect assumptions of other market participants. An entity should consider all market participant assumptions that are available without unreasonable cost and effort. These are given the lowest priority and are generally used in internally developed methodologies to generate management's best estimate of the fair value when no observable market data is available.

A financial instrument's level within the fair value hierarchy (where Level 1 is the highest and Level 3 is the lowest) is based on the lowest level of input significant to the fair value measurement.

The following sections describe the valuation methodologies TVA uses to measure different financial instruments at fair value. Except for gains and losses on SERP, DCP, and RP assets, all changes in fair value of these assets and liabilities have been recorded as changes in regulatory assets, regulatory liabilities, or AOCI on TVA's Consolidated Balance Sheets and Consolidated Statements of Comprehensive Income (Loss). Except for gains and losses on SERP and DCP assets, there has been no impact to the Consolidated Statements of Operations or the Consolidated Statements of Cash Flows related to these fair value measurements.

Investment Funds

At September 30, 2023, Investment funds were comprised of $4.1 billion of equity securities and debt securities classified as trading measured at fair value. Equity and trading debt securities are held in the NDT, ART, SERP, DCP, and RP. The NDT holds funds for the ultimate decommissioning of TVA's nuclear power plants. The ART holds funds primarily for the costs related to the future closure and retirement of TVA's other long-lived assets. The balances in the NDT and ART were $2.8 billion and $1.2 billion, respectively, at September 30, 2023.

129

Table of Contents

TVA established a SERP to provide benefits to selected employees of TVA which are comparable to those provided by competing organizations. The DCP is designed to provide participants with the ability to defer compensation to future periods. The RP is a non-qualified excess 401(K) plan designed to allow certain eligible employees whose contributions to the 401(k) plan are limited by Internal Revenue Service ("IRS") rules to save additional amounts for retirement and receive non-elective and matching employer contributions. The NDT, ART, SERP, DCP, and RP funds are invested in portfolios of securities generally designed to achieve a return in line with overall equity and debt market performance.

The NDT, ART, SERP, DCP, and RP are composed of multiple types of investments and are managed by external institutional investment managers. Most U.S. and international equities, U.S. Treasury inflation-protected securities ("TIPS"), real estate investment trust securities, and cash securities and certain derivative instruments are measured based on quoted exchange prices in active markets and are classified as Level 1 valuations. Fixed-income investments, high-yield fixed-income investments, currencies, and most derivative instruments are non-exchange traded and are classified as Level 2 valuations. These measurements are based on market and income approaches with observable market inputs.

Private equity limited partnerships, private real asset investments, and private credit investments may include holdings of investments in private real estate, venture capital, buyout, mezzanine or subordinated debt, restructuring or distressed debt, and special situations through funds managed by third-party investment managers. These investments generally involve a three-to-four-year period where the investor contributes capital, followed by a period of distribution, typically over several years. The investment period is generally, at a minimum, 10 years or longer. The NDT had unfunded commitments related to private equity limited partnerships of $237 million, private real assets of $123 million, and private credit of $81 million at September 30, 2023. The ART had unfunded commitments related to limited partnerships in private equity of $124 million, private real assets of $60 million, and private credit of $43 million at September 30, 2023. These investments have no redemption or limited redemption options and may also impose restrictions on the NDT's and ART's ability to liquidate their investments. There are no readily available quoted exchange prices for these investments. The fair value of these investments is based on information provided by the investment managers. These investments are valued on a quarterly basis. TVA's private equity limited partnerships, private real asset investments, and private credit investments are valued at net asset values ("NAV") as a practical expedient for fair value. TVA classifies its interest in these types of investments as investments measured at NAV in the fair value hierarchy.

Commingled funds represent investment funds comprising multiple individual financial instruments. The commingled funds held by the NDT, ART, SERP, DCP, and RP consist of either a single class of securities, such as equity, debt, or foreign currency securities, or multiple classes of securities. All underlying positions in these commingled funds are either exchange traded or measured using observable inputs for similar instruments. The fair value of commingled funds is based on NAV per fund share (the unit of account), derived from the prices of the underlying securities in the funds. These commingled funds can be redeemed at the measurement date NAV and are classified as Commingled funds measured at NAV in the fair value hierarchy.

Realized and unrealized gains and losses on equity and trading debt securities are recognized in current earnings and are based on average cost. The gains and losses of the NDT and ART are subsequently reclassified to a regulatory asset or liability account in accordance with TVA's regulatory accounting policy. See Note 1 — Summary of Significant Accounting Policies — Cost-Based Regulation and Note 10 — Regulatory Assets and Liabilities. TVA recorded unrealized gains and losses related to its equity and trading debt securities held during each period as follows:


Unrealized Investment Gains (Losses)(1) For the years ended September 30 (in millions)
Fund	Financial Statement Presentation	2023		2022
NDT	Regulatory assets(2)	$	162	$	(396)
ART	Regulatory assets(3)	96		(190)
SERP	Other income (expense)	6		(19)
DCP	Other income (expense)	1		(5)

Notes

(1) Employee contributions to the RP began in the second quarter of 2023. As of September 30, 2023, the unrealized losses for the RP were less than $1 million, and therefore were not represented in the table above.

(2) Includes $27 million of unrealized gains and $138 million of unrealized losses related to NDT equity securities (excluding commingled funds) for the years ended September 30, 2023 and 2022, respectively.

(3) Includes $13 million of unrealized gains and $44 million of unrealized losses related to ART equity securities (excluding commingled funds) for the years ended September 30, 2023 and 2022, respectively.

Currency and Interest Rate Swap Derivatives

See Note 15 — Risk Management Activities and Derivative Transactions — Cash Flow Hedging Strategy for Currency Swaps and Derivatives Not Receiving Hedge Accounting Treatment for a discussion of the nature, purpose, and contingent features of TVA's currency swaps and interest rate swaps. These swaps are classified as Level 2 valuations and are valued based on income approaches using observable market inputs for similar instruments.

130

Table of Contents

Commodity Contract Derivatives and Commodity Derivatives under the FHP

Commodity Contract Derivatives. Most of these derivative contracts are valued based on market approaches, which utilize short-term and mid-term market-quoted prices from an external industry brokerage service. These contracts are classified as Level 2 valuations.

Commodity Derivatives under the FHP. Swap contracts are valued using a pricing model based on New York Mercantile Exchange inputs and are subject to nonperformance risk outside of the exit price. These contracts are classified as Level 2 valuations.

See Note 15 — Risk Management Activities and Derivative Transactions — Derivatives Not Receiving Hedge Accounting Treatment — Commodity Derivatives and — Commodity Derivatives under the FHP.

Nonperformance Risk

The assessment of nonperformance risk, which includes credit risk, considers changes in current market conditions, readily available information on nonperformance risk, letters of credit, collateral, other arrangements available, and the nature of master netting arrangements. TVA is a counterparty to currency swaps, interest rate swaps, commodity contracts, and other derivatives which subject TVA to nonperformance risk. Nonperformance risk on the majority of investments and certain exchange-traded instruments held by TVA is incorporated into the exit price that is derived from quoted market data that is used to mark the investment to market.

Nonperformance risk for most of TVA's derivative instruments is an adjustment to the initial asset/liability fair value. TVA adjusts for nonperformance risk, both of TVA (for liabilities) and the counterparty (for assets), by applying credit valuation adjustments ("CVAs"). TVA determines an appropriate CVA for each applicable financial instrument based on the term of the instrument and TVA's or the counterparty's credit rating as obtained from Moody's. For companies that do not have an observable credit rating, TVA uses internal analysis to assign a comparable rating to the counterparty. TVA discounts each financial instrument using the historical default rate (as reported by Moody's for CY 1983 to CY 2022) for companies with a similar credit rating over a time period consistent with the remaining term of the contract. The application of CVAs resulted in a $1 million decrease in the fair value of assets and a $1 million decrease in the fair value of liabilities at September 30, 2023.

Fair Value Measurements

The following tables set forth by level, within the fair value hierarchy, TVA's financial assets and liabilities that were measured at fair value on a recurring basis at September 30, 2023 and 2022. Financial assets and liabilities have been classified in their entirety based on the lowest level of input that is significant to the fair value measurement. TVA's assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the determination of the fair value of the assets and liabilities and their classification in the fair value hierarchy levels.

131

Table of Contents


Fair Value Measurements At September 30, 2023 (in millions)
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets
Investments
Equity securities	$	608	$	—	$	—	$	608
Government debt securities(1)(2)	287		60		—		347
Corporate debt securities(3)	—		300		—		300
Mortgage and asset-backed securities	—		36		—		36
Institutional mutual funds	288		—		—		288
Forward debt securities contracts	—		11		—		11
Cash equivalents and other short-term investments(2)	104		166		—		270
Private equity funds measured at net asset value(4)	—		—		—		583
Private real asset funds measured at net asset value(4)	—		—		—		387
Private credit funds measured at net asset value(4)	—		—		—		158
Commingled funds measured at net asset value(4)	—		—		—		1,135
Total investments	1,287		573		—		4,123
Interest rate swaps	—		4		—		4
Commodity contract derivatives	—		33		—		33



Total	$	1,287	$	610	$	—	$	4,160

	Quoted Prices in Active Markets for Identical Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Liabilities
Currency swaps(5)	$	—	$	141	$	—	$	141
Interest rate swaps	—		662		—		662
Commodity contract derivatives	—		2		—		2
Commodity derivatives under the FHP	—		186		—		186

Total	$	—	$	991	$	—	$	991

Notes

(1) Includes securities of government-sponsored entities.

(2) There are $287 million of U.S. Treasury Securities in Level 1 Government debt securities and $104 million of U.S. Treasury Securities in Level 1 Cash equivalents and other short-term investments for a total of $391 million of U.S. Treasury securities within Level 1 of the fair value hierarchy.

(3) Includes both U.S. and foreign debt.

(4) Certain investments that are measured at fair value using the NAV or its equivalent ("alternative investments") have not been categorized in the fair value hierarchy. The inputs to these fair value measurements include underlying NAVs, discounted cash flow valuations, comparable market valuations, and adjustments for currency, credit, liquidity, and other risks. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented on the Consolidated Balance Sheets.

(5) TVA records currency swaps net of cash collateral received from or paid to the counterparty, to the extent such amount is not recorded in Accounts payable and accrued liabilities. See Note 15 — Risk Management Activities and Derivative Transactions — Offsetting of Derivative Assets and Liabilities.

132

Table of Contents


Fair Value Measurements At September 30, 2022 (in millions)
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets
Investments
Equity securities	$	534	$	—	$	—	$	534
Government debt securities(1)(2)(3)	297		35		—		332
Corporate debt securities(3)(4)	—		282		—		282
Mortgage and asset-backed securities	—		52		—		52
Institutional mutual funds	242		—		—		242
Forward debt securities contracts	—		4		—		4
Cash equivalents and other short-term investments(2)(3)	61		118		—		179
Private equity funds measured at net asset value(5)	—		—		—		487
Private real asset funds measured at net asset value(5)	—		—		—		369
Private credit funds measured at net asset value(5)	—		—		—		103
Commingled funds measured at net asset value(3)(5)	—		—		—		1,087


Total investments	1,134		491		—		3,671

Commodity contract derivatives	—		152		—		152
Commodity derivatives under the FHP	—		123		—		123



Total	$	1,134	$	766	$	—	$	3,946

	Quoted Prices in Active Markets for Identical Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Liabilities
Currency swaps(6)	$	—	$	240	$	—	$	240
Interest rate swaps	—		905		—		905
Commodity contract derivatives	—		7		—		7
Commodity derivatives under the FHP	—		8		—		8
Total	$	—	$	1,160	$	—	$	1,160

Notes

(1) Includes securities of government-sponsored entities.

(2) There are $297 million of U.S. Treasury Securities in Level 1 Government debt securities and $61 million of U.S. Treasury Securities in Level 1 Cash equivalents and other short-term investments for a total of $358 million of U.S. Treasury securities within Level 1 of the fair value hierarchy.

(3) At September 30, 2022, $61 million of the Level 1 Government debt securities have been reclassified to Level 1 Cash equivalents and other short-term investments. At September 30, 2022, $1 million of the Level 2 Government debt securities, $1 million of the Level 2 Corporate debt securities, and $116 million of the Commingled funds measured at net asset value have been reclassified to Level 2 Cash equivalents and other short-term investments.

(4) Includes both U.S. and foreign debt.

(5) Certain investments that are measured at fair value using the NAV or its equivalent ("alternative investments") have not been categorized in the fair value hierarchy. The inputs to these fair value measurements include underlying NAVs, discounted cash flow valuations, comparable market valuations, and adjustments for currency, credit, liquidity, and other risks. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented on the Consolidated Balance Sheets.

(6) TVA records currency swaps net of cash collateral received from or paid to the counterparty, to the extent such amount is not recorded in Accounts payable and accrued liabilities. See Note 15 — Risk Management Activities and Derivative Transactions — Offsetting of Derivative Assets and Liabilities.

133

Table of Contents

Other Financial Instruments Not Recorded at Fair Value

TVA uses the methods and assumptions described below to estimate the fair value of each significant class of financial instruments. The fair value of the financial instruments held at September 30, 2023 and 2022, may not be representative of the actual gains or losses that will be recorded when these instruments mature or are called or presented for early redemption. The estimated values of TVA's financial instruments not recorded at fair value at September 30, 2023 and 2022, were as follows:


Estimated Values of Financial Instruments Not Recorded at Fair Value (in millions)
		At September 30, 2023				At September 30, 2022
	Valuation Classification	Carrying Amount		Fair Value		Carrying Amount		Fair Value
EnergyRight® receivables, net (including current portion)	Level 2	$	59	$	55	$	62	$	62

Loans and other long-term receivables, net (including current portion)	Level 2	104		96		105		96

EnergyRight® financing obligations (including current portion)	Level 2	69		81		72		81

Unfunded loan commitments	Level 2	—		1		—		—

Membership interests of VIEs subject to mandatory redemption (including current portion)	Level 2	18		19		20		22

Long-term outstanding power bonds, net (including current maturities)	Level 2	18,866		17,963		17,856		18,070

Long-term debt of VIEs, net (including current maturities)	Level 2	968		927		1,007		989

The carrying value of Cash and cash equivalents, Restricted cash and cash equivalents, Accounts receivable, net, and Short-term debt, net approximate their fair values.

The fair value for loans and other long-term receivables is estimated by determining the present value of future cash flows using a discount rate equal to lending rates for similar loans made to borrowers with similar credit ratings and for similar remaining maturities, where applicable. The fair value of long-term debt and membership interests of VIEs subject to mandatory redemption is estimated by determining the present value of future cash flows using current market rates for similar obligations, giving effect to credit ratings and remaining maturities.

134

Table of Contents

17. Revenue

Revenue from Sales of Electricity

TVA's revenue from contracts with customers is primarily derived from the generation and sale of electricity to its customers and is included in Revenue from sales of electricity on the Consolidated Statements of Operations. Electricity is sold primarily to LPCs for distribution to their end-use customers. In addition, TVA sells electricity to directly served industrial companies, federal agencies, and others.


LPC sales			Approximately 92 percent of TVA's Revenue from sales of electricity for both the years ended September 30, 2023 and 2022, was from LPCs, which then distribute the power to their customers using their own distribution systems. Power is delivered to each LPC at delivery points within the LPC's service territory. TVA recognizes revenue when the customer takes possession of the power at the delivery point. For power sales, the performance obligation to deliver power is satisfied in a series over time because the sales of electricity over the term of the customer contract are a series of distinct goods that are substantially the same and have the same pattern of transfer to the customer. TVA has no continuing performance obligations subsequent to delivery. Using the output method for revenue recognition provides a faithful depiction of the transfer of electricity as customers obtain control of the power and benefit from its use at delivery. Additionally, TVA has an enforceable right to consideration for energy delivered at any discrete point in time and will recognize revenue at an amount that reflects the consideration to which TVA is entitled for the energy delivered. The amount of revenue is based on contractual prices approved by the TVA Board. Customers are invoiced monthly for power delivered as measured by meters located at the delivery points. The net transaction price is offset by certain credits available to customers that are known at the time of billing. Credits are designed to achieve objectives of the TVA Act and include items such as hydro preference credits for residential customers of LPCs, economic development credits to promote growth in the Tennessee Valley, wholesale bill credits to maintain long-term partnerships with LPCs, pandemic credits created to support LPCs and strengthen the public power response to the COVID-19 pandemic, and demand response credits allowing TVA to reduce industrial customer usage in periods of peak demand to balance system demand. Payments are typically due within approximately one month of invoice issuance.

Directly served customers			Directly served customers, including industrial customers, federal agencies, and other customers, take power for their own consumption. Similar to LPCs, power is delivered to a delivery point, at which time the customer takes possession and TVA recognizes revenue. For all power sales, the performance obligation to deliver power is satisfied in a series over time since the sales of electricity over the term of the customer contract are a series of distinct goods that are substantially the same and have the same pattern of transfer to the customer. TVA has no continuing performance obligations subsequent to delivery. Using the output method for revenue recognition provides a faithful depiction of the transfer of electricity as customers obtain control of the power and benefit from its use at delivery. Additionally, TVA has an enforceable right to consideration for energy delivered at any discrete point in time and will recognize revenue at an amount that reflects the consideration to which TVA is entitled for the energy delivered. The amount of revenue is based on contractual prices approved by the TVA Board. Customers are invoiced monthly for power delivered as measured by meters located at the delivery points. The net transaction price is offset by certain credits available to customers that are known at the time of billing. Examples of credits include items such as economic development credits to promote growth in the Tennessee Valley, pandemic credits created to support directly served customers in response to the COVID-19 pandemic, and demand response credits allowing TVA to reduce industrial customer usage in periods of peak demand to balance system demand. Payments are typically due within approximately one month of invoice issuance.

Other Revenue

135

Table of Contents

Disaggregated Revenues

During 2023, revenues generated from TVA's electricity sales were $11.9 billion and accounted for virtually all of TVA's revenues. TVA's operating revenues by state for each of the last three years are detailed in the table below:


Operating Revenues By State For the years ended September 30 (in millions)
	2023		2022		2021
Alabama	$	1,731	$	1,778	$	1,508
Georgia	284		299		254
Kentucky	773		821		655
Mississippi	1,146		1,182		984
North Carolina	89		87		66
Tennessee	7,819		8,137		6,841
Virginia	46		48		42
Subtotal	11,888		12,352		10,350
Off-system sales	14		19		7
Revenue capitalized during pre-commercial plant operations(1)	(3)		—		—
Revenue from sales of electricity	11,899		12,371		10,357
Other revenue	155		169		146
Total operating revenues	$	12,054	$	12,540	$	10,503

Note

(1) Represents revenue capitalized during pre-commercial operations at Colbert Combustion Turbine Units 9-11.

TVA's operating revenues by customer type for each of the last three years are detailed in the table below:


Operating Revenues by Customer Type For the years ended September 30 (in millions)
	2023		2022		2021
Revenue from sales of electricity
Local power companies	$	10,903	$	11,291	$	9,534
Industries directly served	864		926		707
Federal agencies and other	135		154		116
Revenue capitalized during pre-commercial plant operations(1)	(3)		—		—
Revenue from sales of electricity	11,899		12,371		10,357
Other revenue	155		169		146
Total operating revenues	$	12,054	$	12,540	$	10,503

Note

(1) Represents revenue capitalized during pre-commercial operations at Colbert Combustion Turbine Units 9-11.

TVA and LPCs continue to work together to meet the changing needs of consumers around the Tennessee Valley. In 2019, the TVA Board approved a Partnership Agreement option that better aligns the length of LPC power contracts with TVA's long-term commitments. Under the partnership arrangement, the LPC power contracts automatically renew each year and have a 20-year termination notice. The partnership arrangements can be terminated under certain circumstances, including TVA's failure to limit rate increases as provided for in the agreements going forward. Participating LPCs receive benefits including a 3.1 percent wholesale bill credit in exchange for their long-term commitment, which enables TVA to recover its long-term financial commitments over a commensurate period. The total wholesale bill credits to LPCs participating in the Partnership Agreement were $199 million, $199 million, and $189 million, respectively, for the years ended September 30, 2023, 2022, and 2021. In 2020, TVA provided participating LPCs a flexibility option, named Generation Flexibility, that allows them to locally generate or purchase up to approximately five percent of their average total hourly energy sales over a certain time period in order to meet their individual customers' needs. Revised flexibility agreements were made available to LPCs in August 2023 which permit projects to be located anywhere in TVA's service area, either connected to the LPC distribution system or TVA's transmission system, and make it easier for LPCs to partner in projects. As of September 30, 2023, 147 LPCs had signed the Partnership Agreement with TVA, and 89 LPCs had signed a Power Supply Flexibility Agreement.

In previous years, the TVA Board approved pandemic credits, which were effective for 2021, 2022, and 2023. These

136

Table of Contents

credits provided an annual 2.5 percent monthly base rate credit and applied to service provided to TVA's LPCs, their large commercial and industrial customers, and TVA directly served customers. For the years ended September 30, 2023, 2022, and 2021, pandemic credits totaled $225 million and $228 million, and $221 million, respectively.

The number of LPCs by contract arrangement, the revenues derived from such arrangements for 2023, and the percentage those revenues comprised of TVA's total operating revenues for 2023, are summarized in the table below:


TVA Local Power Company Contracts At or for the year ended September 30, 2023
Contract Arrangements(1)	Number of LPCs	Revenue from Sales of Electricity to LPCs (in millions)		Percentage of Total Operating Revenues
20-year termination notice	147	$	9,367	77.7	%


5-year termination notice	6	1,536		12.7	%
Total	153	$	10,903	90.4	%

Note

(1) Ordinarily, the LPCs and TVA have the same termination notice period; however, in a contract with one of the LPCs with a five-year termination notice, TVA has a 10-year termination notice (which becomes a five-year termination notice if TVA loses its discretionary wholesale rate-setting authority). Certain LPCs have five-year termination notices or a shorter period if any act of Congress, court decision, or regulatory change requires or permits that election.

Contract Balances

Contract assets represent an entity's right to consideration in exchange for goods and services that the entity has transferred to customers. TVA did not have any material contract assets at September 30, 2023.

Contract liabilities represent an entity's obligations to transfer goods or services to customers for which the entity has received consideration (or an amount of consideration is due) from the customers. These contract liabilities are primarily related to upfront consideration received prior to the satisfaction of the performance obligation. See Economic Development Incentives below and Note 12 — Other Long-Term Liabilities — Long-Term Deferred Revenue.

Economic Development Incentives. Under certain economic development programs TVA offers incentives to existing and potential power customers in targeted business sectors that make multi-year commitments to invest in the Tennessee Valley. TVA records those incentives as reductions of revenue. Incentives recorded as a reduction to revenue were $330 million, $328 million, and $315 million for 2023, 2022, and 2021, respectively. Incentives that have been approved but have not been paid are recorded in Accounts payable and accrued liabilities and Other long-term liabilities on the Consolidated Balance Sheets. At September 30, 2023 and 2022, the outstanding unpaid incentives were $188 million and $187 million, respectively. Incentives that have been paid out may be subject to claw back if the customer fails to meet certain program requirements.

18. Other Income, Net

Income and expenses not related to TVA's operating activities are summarized in the following table:


Other Income, Net For the years ended September 30 (in millions)
	2023		2022		2021
Bellefonte	$	—	$	—	$	(28)
Interest income	34		15		12
External services	15		16		13
Gains (losses) on investments	13		(17)		16
Miscellaneous	(1)		(7)		—
Total other income, net	$	61	$	7	$	13

19. Supplemental Cash Flow Information

Interest paid was $1.1 billion for each of 2023, 2022, and 2021. These amounts differ from interest expense in certain years due to the timing of payments. There was no interest capitalized in 2023, 2022, or 2021.

137

Table of Contents

Construction in progress and nuclear fuel expenditures included in Accounts payable and accrued liabilities at September 30, 2023, 2022, and 2021 were $559 million, $510 million, and $539 million, respectively, and are excluded from the Consolidated Statements of Cash Flows for the years ended September 30, 2023, 2022, and 2021 as non-cash investing activities. ARO project accruals included in Accounts payable and accrued liabilities at September 30, 2023, 2022, and 2021 were $71 million, $119 million, and $98 million, respectively, and are excluded from the Consolidated Statements of Cash Flows for the years ended September 30, 2023, 2022, and 2021 as non-cash operating activities.

There are no material finance leases that were entered into during the years ended September 30, 2023 and 2022. Excluded from the Consolidated Statements of Cash Flows for the year ended September 30, 2021, were non-cash investing and financing activities of $233 million related primarily to an increase in lease assets and liabilities incurred for a finance lease that was amended in March 2021. See Note 8 — Leases for further information regarding TVA's finance leases.

Cash flows from swap contracts that are accounted for as hedges are classified in the same category as the item being hedged or on a basis consistent with the nature of the instrument.

20. Benefit Plans

TVA sponsors a pension plan that covers most of its full-time employees hired prior to July 1, 2014, a qualified defined contribution plan ("401(k) plan") that covers most of its full-time employees, two unfunded post-retirement health care plans that provide for non-vested contributions toward the cost of eligible retirees' medical coverage, other post-employment benefits such as workers' compensation, the Restoration Plan, and the SERP. The pension plan and the 401(k) plan are administered by a separate legal entity, the TVA Retirement System ("TVARS"), which is governed by its own board of directors (the "TVARS Board").

Overview of Plans and Benefits

Retirement Plans. The participants in the pension plan receive either a traditional final average pay pension or a cash balance pension. The traditional pension benefit is based on the participant's creditable service, average monthly salary for the participant's highest three consecutive years of eligible compensation, and a pension factor based on the participant's age and years of service, less a Social Security offset. The cash balance pension benefit is based on pay and interest credits accumulated in the participant's account and the participant's age.

Participants in the pension plan are also eligible to receive 401(k) plan matching contributions, may be eligible to receive 401(k) plan non-elective contributions, and may be eligible to make after-tax contributions of up to $10,000 per year to the pension plan, which at the election of the participant are invested in either the fixed fund, which receives a fixed interest rate set forth in the plan, or the variable fund, which receives a rate of return based on an S&P 500 index fund. Participants in the pension plan may also become eligible for a supplemental pension benefit based on age and years of service at retirement, which is provided to help offset the cost of retiree medical insurance. Employees first hired on or after July 1, 2014, are participants in the 401(k) plan only and receive both non-elective and matching contributions to their accounts in the 401(k) plan.

401(k) Plan. Under the 401(k) plan, the non-elective and matching contributions TVA makes to participant accounts depends on the employee's hire date, years of service, and individual elections. Non-elective employer contributions for eligible participants range from three percent to six percent and matching employer contributions range from 1.5 percent to six percent. TVA recognized 401(k) contribution costs of $105 million, $97 million, and $92 million during 2023, 2022, and 2021, respectively.

Restoration Plan. TVA established the Restoration Plan, a nonqualified excess 401(k) plan, to allow certain eligible employees whose contributions to the 401(k) plan are limited by IRS rules to save additional amounts for retirement and receive non-elective and matching employer contributions. During 2023, TVA recognized less than $1 million in Restoration Plan benefit costs.

Supplemental Executive Retirement Plan. TVA has established a SERP for certain executives in critical positions to provide supplemental pension benefits tied to compensation that exceeds limits imposed by IRS rules applicable to the qualified defined benefit pension plan.

Other Post-Retirement Benefits. TVA sponsors two unfunded post-retirement benefit plans that provide for non-vested contributions toward the cost of certain eligible retirees' medical coverage. The first plan covers only certain retirees and surviving dependents who do not qualify for TVARS benefits, including the supplemental pension benefit. The second plan is designed to place a limit on the out-of-pocket amount certain eligible retirees pay for medical coverage and provides a credit based on years of TVA service and monthly base pension amount, reduced by any TVARS supplemental pension benefits or any TVA contribution from the first plan, described above. In January 2017, TVA began providing all Medicare-eligible retirees and spouses Medicare supplement coverage through a private exchange. Transition to the exchange did not affect any TVARS supplemental benefits for eligible retirees, and the credit continues to be calculated in the same manner as before.

Other Post-Employment Benefits. TVA employees injured in work-related incidents are covered by the workers' compensation program for federal employees administered through the Department of Labor by the Office of Workers'

138

Table of Contents

Compensation Programs in accordance with the provisions of FECA. FECA provides compensation and medical benefits to federal employees for permanent and temporary disability due to employment-related injury or disease.

Accounting Mechanisms

Regulatory Accounting. TVA has classified all amounts related to unrecognized prior service costs/(credits), net actuarial gains or losses, and the funded status as regulatory assets or liabilities as such amounts are probable of collection in future rates. Additionally, TVA recognizes pension costs as regulatory assets or regulatory liabilities to the extent that the amount calculated under U.S. GAAP as pension expense differs from the amount TVA contributes to the pension plan as pension plan contributions. As a result of plan design changes, future contributions are expected to exceed the expense calculated under U.S. GAAP. Accordingly, TVA discontinued this regulatory accounting practice as all such deferred costs were recovered as of September 30, 2023.

Cost Method. TVA uses the projected unit credit cost method to determine the service cost and the projected benefit obligation for retirement, termination, and ancillary benefits. Under this method, a "projected accrued benefit" is calculated at the beginning of the year and at the end of the year for each benefit that may be payable in the future. The "projected accrued benefit" is based on the plan's accrual formula and upon service at the beginning or end of the year, but it uses final average compensation, social security benefits, and other relevant factors projected to the age at which the employee is assumed to leave active service. The projected benefit obligation is the actuarial present value of the "projected accrued benefits" at the beginning of the year for employed participants and is the actuarial present value of all benefits for other participants. The service cost is the actuarial present value of the difference between the "projected accrued benefits" at the beginning and end of the year.

Amortization of Net Gain or Loss. TVA utilizes the corridor approach for gain/loss amortization. Differences between actuarial assumptions and actual plan results are deferred and amortized into periodic cost only when the accumulated differences exceed 10 percent of the greater of the projected benefit obligation or the market-related value of plan assets. If necessary, the excess is amortized over the average future expected working lifetime of participants expected to receive benefits, which is approximately 11 years for the pension plan and 14 years for the post-retirement plans.

Amortization of Prior Service Cost/(Credit). Amortization of net prior service cost/(credit) resulting from a plan change is included as a component of period expense in the year first recognized and every year thereafter until it is fully amortized. The increase or decrease in the benefit obligation due to the plan change is amortized over the average remaining service period of participating employees expected to receive benefits under the plan. The pension and post-retirement plans currently have prior service costs/(credits) from plan changes made in 2016, 2018, 2020, and 2021 with remaining amortization periods ranging from one to six years. However, when a plan change reduces the benefit obligation, existing positive prior service costs are reduced or eliminated starting with the earliest established before a new prior service credit base is established.

Asset Method. TVA's asset method calculates a market-related value of assets ("MRVA") that recognizes realized and unrealized investment gains and losses over a three-year smoothing period to decrease the volatility of annual net periodic pension benefit costs. The MRVA is used to determine the expected return on plan assets, a component of net periodic pension benefit cost. The difference in the expected return on the MRVA and the actual return on the fair value on plan assets is recognized as an actuarial (gain)/loss in the pension benefit obligation at September 30. However, the MRVA has no impact on the fair value of plan assets measured at September 30.

Obligations and Funded Status

The actuarial results provided reflect data and assumptions appropriate for the purpose of the measurement of plan obligations and funded status for the year ended. Lingering effects of the COVID-19 pandemic, supply-chain disruptions, inflation, and geopolitical tensions on the financial markets, regulations, and experience are uncertain and still evolving, creating an additional degree of complexity associated with the future occurrence or outcome of events and conditions underlying the significant accounting assumptions used to measure the plan obligations.

139

Table of Contents

The changes in plan obligations, assets, and funded status for the years ended September 30, 2023 and 2022, were as follows:


Obligations and Funded Status For the years ended September 30 (in millions)
812,900,000	Pension Benefits				Other Post-Retirement Benefits
809,400,000	2023		2022		2023		2022
Change in benefit obligation
Benefit obligation at beginning of year	$	10,536	$	13,348	$	388	$	498
Service cost	32		53		10		17
Interest cost	568		378		18		15
Plan participants' contributions	4		5		—		—
Collections(1)	—		—		13		15

Actuarial (gain) loss	(284)		(2,509)		(44)		(114)

Net transfers (to) from variable fund/401(k) plan	4		11		—		—
Expenses paid	(7)		(6)		—		—
Benefits paid	(754)		(744)		(38)		(43)
Benefit obligation at end of year	10,099		10,536		347		388

Change in plan assets
Fair value of net plan assets at beginning of year	8,094		9,110		—		—
Actual return on plan assets	482		(590)		—		—
Plan participants' contributions	4		5		—		—
Collections(1)	—		—		13		15
Net transfers (to) from variable fund/401(k) plan	4		11		—		—
Employer contributions	306		308		25		28
Expenses paid	(7)		(6)		—		—
Benefits paid	(754)		(744)		(38)		(43)
Fair value of net plan assets at end of year	8,129		8,094		—		—

Funded status	$	(1,970)	$	(2,442)	$	(347)	$	(388)

Note

(1) Collections include retiree contributions as well as provider discounts and rebates.

For 2023, the $284 million pension benefit obligation actuarial gain was primarily due to the increase in the discount rate from 5.60 percent to 5.95 percent, which decreased the liability by $334 million. In addition, based on the results obtained from the most recent experience study performed in 2023, TVA recognized actuarial gains of $23 million due to the revision in demographic and other experience related assumptions to reflect anticipated future plan experience. These gains were partially offset by a $61 million actuarial loss due to higher COLA and higher interest crediting rates than previously assumed for CY 2024, and a $12 million actuarial loss due to observed plan experience.

For 2022, the $2.5 billion pension benefit obligation actuarial gain was primarily due to the increase in the discount rate from 2.90 percent to 5.60 percent, which decreased the liability by $3.5 billion. This gain was partially offset by a $527 million actuarial loss due to mortality assumption changes, a $411 million actuarial loss due to the higher COLA and higher interest crediting rates than previously assumed for CY 2023 and CY 2024, and a $78 million actuarial loss due to demographic and plan experience.

The other post-retirement actuarial gain for 2023 decreased the benefit obligation by $44 million. TVA recognized a $61 million actuarial gain primarily due to lower retirement rate assumptions than previously assumed and actuarial gains of $10 million due to the revision of demographic and other experience related assumptions to reflect anticipated future plan experience based on the results obtained from the 2023 experience study. In addition, TVA recognized a $17 million actuarial gain from the increase in the discount rate from 5.65 percent to 6.05 percent. These gains were partially offset by a $27 million actuarial loss to reflect observed and anticipated plan experience for contribution costs and pre-Medicare per capita claims costs and a $17 million actuarial loss due to changes in the pre-Medicare per capita claims cost trend rate assumptions.

The $114 million other post-retirement actuarial gain for 2022 was primarily due to the increase in the discount rate from 3.05 percent to 5.65 percent, which decreased the liability by $168 million. The liability decreased an additional $31 million as a

140

Table of Contents

result of an actuarial gain from delaying the ultimate post-Medicare trend rate assumption two years due to favorable premium rates. These gains were partially offset by a $67 million actuarial loss due to changes in pre-Medicare trend rate assumptions related to higher claim costs and lower expected future retiree contributions. In addition, TVA recognized an $18 million actuarial loss due to mortality assumption changes.

Amounts related to these benefit plans recognized on TVA's Consolidated Balance Sheets consist of regulatory assets and liabilities that have not been recognized as components of net periodic benefit cost at September 30, 2023 and 2022, and the funded status of TVA's benefit plans, which are included in Accounts payable and accrued liabilities and Post-retirement and post-employment benefit obligations:


Amounts Recognized on TVA's Consolidated Balance Sheets At September 30 (in millions)
	Pension Benefits				Other Post-Retirement Benefits
	2023		2022		2023		2022
Regulatory assets (liabilities)	$	1,440	$	1,839	$	(95)	$	(70)
Accounts payable and accrued liabilities	(6)		(6)		(21)		(22)
Pension and post-retirement benefit obligations(1)	(1,964)		(2,436)		(326)		(366)

Note

(1) The table above excludes $237 million and $270 million of post-employment benefit costs that are recorded in Post-retirement and post-employment benefit obligations on the Consolidated Balance Sheets at September 30, 2023 and 2022, respectively.

Unrecognized amounts included in regulatory assets or liabilities yet to be recognized as components of accrued benefit cost at September 30, 2023 and 2022, consisted of the following:


Post-Retirement Benefit Costs Deferred as Regulatory Assets (Liabilities) At September 30 (in millions)
	Pension Benefits				Other Post-Retirement Benefits
	2023		2022		2023		2022
Unrecognized prior service credit	$	(336)	$	(424)	$	(59)	$	(76)
Unrecognized net loss (gain)	1,776		2,186		(36)		6
Amount capitalized due to actions of regulator	—		77		—		—
Total regulatory assets (liabilities)	$	1,440	$	1,839	$	(95)	$	(70)

Information for the pension projected benefit obligation ("PBO") in excess of plan assets and other post-retirement accumulated postretirement benefit obligation ("APBO") has been disclosed in the Obligations and Funded Status table above. The following table provides the pension plan accumulated benefit obligation ("ABO") in excess of plan assets. The other post-retirement plans are unfunded or have no plan assets.


Accumulated Benefit Obligations in Excess of Plan Assets At September 30 (in millions)
	2023		2022

Accumulated benefit obligation	$	10,069	$	10,508
Fair value of net plan assets	8,129		8,094

141

Table of Contents

The components of net periodic benefit cost and other amounts recognized as changes in regulatory assets for the years ended September 30, 2023, 2022, and 2021 were as follows:


Components of Net Periodic Benefit Cost For the years ended September 30 (in millions)
	Pension Benefits						Other Post-Retirement Benefits
	2023		2022		2021		2023		2022		2021
Service cost	$	32	$	53	$	57	$	10	$	17	$	18
Interest cost	568		378		368		18		15		16
Expected return on plan assets	(492)		(435)		(493)		—		—		—
Amortization of prior service credit	(88)		(93)		(97)		(17)		(17)		(18)
Recognized net actuarial loss (gain)	135		392		452		(2)		5		11
Total net periodic benefit cost as actuarially determined	155		295		287		9		20		27
Amount expensed due to actions of regulator	77		13		19		—		—		—
Net periodic benefit cost	$	232	$	308	$	306	$	9	$	20	$	27

Plan Assumptions

Plan assumptions utilized to determine benefit obligations and net periodic benefit costs include discount rates, projected health care cost trend rates, COLAs, expected long-term rate of return on plan assets, rate of increase in future compensation levels, retirement rates, expected timing and form of payments, and mortality rates, of which certain key assumptions are noted below. Every five years, a formal actuarial experience study that compares assumptions to the actual experience is conducted. Additional ad-hoc experience studies are performed as needed to review recent experience and validate recommended changes to the actuarial assumptions used based upon TVA's latest experience study in 2023.


Actuarial Assumptions Utilized to Determine Benefit Obligations at September 30
	Pension Benefits		Other Post-Retirement Benefits
	2023	2022	2023	2022
Discount rate	5.95%	5.60%	6.05%	5.65%
Average rate of compensation increase	4.05%	3.32%	N/A	N/A
Weighted average interest crediting rate	5.13%	5.14%	N/A	N/A
Cost of living adjustment (COLA)(1)	2.00%	2.00%	2.00%	2.00%
Pre-Medicare eligible per capita claim costs
Current health care cost trend rate	N/A	N/A	7.50%	7.00%
Ultimate health care cost trend rate	N/A	N/A	5.00%	5.00%
Year ultimate trend rate is reached	N/A	N/A	2034	2031
Pre-Medicare eligible per capita contributions
Current health care cost trend rate	N/A	N/A	5.00%	5.00%
Ultimate health care cost trend rate	N/A	N/A	5.00%	5.00%
Year ultimate trend rate is reached	N/A	N/A	2022	2022
Post-Medicare eligible
Current health care cost trend rate	N/A	N/A	—%	—%
Ultimate health care cost trend rate	N/A	N/A	4.00%	4.00%
Year ultimate trend rate is reached	N/A	N/A	2026	2026

Note

(1) The COLA assumption rate is the ultimate long-term rate. The calendar year rate for 2024 is assumed to be 4.05 percent, and for years thereafter the ultimate rate is used.

142

Table of Contents


Actuarial Assumptions Utilized to Determine Net Periodic Benefit Cost for the Years Ended September 30(1)
	Pension Benefits			Other Post-Retirement Benefits
	2023	2022	2021	2023	2022	2021
Discount rate	5.60%	2.90%	2.75%	5.65%	3.05%	3.05%
Expected return on plan assets(2)	6.50%	5.75%	6.75%	N/A	N/A	N/A
Weighted average interest crediting rate	5.14%	5.14%	5.15%	N/A	N/A	N/A
Cost of living adjustment (COLA)(3)	2.00%	2.00%	2.00%	2.00%	2.00%	2.00%
Average rate of compensation increase	3.28%	3.32%	3.37%	N/A	N/A	N/A
Pre-Medicare eligible per capita claims costs
Current health care cost trend rate	N/A	N/A	N/A	7.00%	6.25%	6.50%
Ultimate health care cost trend rate	N/A	N/A	N/A	5.00%	5.00%	5.00%
Year ultimate trend rate is reached	N/A	N/A	N/A	2031	2027	2027
Pre-Medicare eligible per capita contributions
Current health care cost trend rate	N/A	N/A	N/A	5.00%	8.51%	11.93%
Ultimate health care cost trend rate	N/A	N/A	N/A	5.00%	5.00%	5.00%
Year ultimate trend rate is reached	N/A	N/A	N/A	2022	2027	2027
Post-Medicare eligible
Current health care cost trend rate	N/A	N/A	N/A	—%	—%	—%
Ultimate health care cost trend rate	N/A	N/A	N/A	4.00%	4.00%	4.00%
Year ultimate trend rate is reached	N/A	N/A	N/A	2026	2024	2024

Notes

(1) The actuarial assumptions used to determine the benefit obligations at September 30 of each year are subsequently used to determine net periodic benefit cost

for the following year except the rate of compensation increase assumption.

(2) The actual return on assets for 2023, 2022, and 2021 were 6.13 percent, (6.64) percent, and 20.30 percent, respectively.

(3) The COLA assumption rate is the ultimate rate. The actual calendar year rate is used in determining the expense, and for years thereafter the ultimate rate is used.

Discount Rate. In selecting the assumed discount rate, TVA reviews market yields on high-quality corporate debt and endeavors to match, through the use of a hypothetical bond portfolio, instrument maturities with the maturities of its pension obligations in accordance with the prevailing accounting standards. The selected bond portfolio is derived from a universe of high quality corporate bonds of Aa-rated quality or higher. After the bond portfolio is selected, a single interest rate is determined that equates the present value of the plan's projected benefit payments discounted at this rate with the market value of the bonds selected.

Expected Return on Plan Assets. The qualified defined benefit pension plan is the only plan that is funded with qualified plan assets. The expected rate of return is based on annual studies performed by third-party professional investment consultants. In determining the expected long-term rate of return on pension plan assets, TVA uses a process that incorporates actual historical asset class returns and an assessment of expected future performance and takes into consideration external actuarial advice, the current outlook on capital markets, the asset allocation policy, and the anticipated investment expenses and impact of active management. Asset allocations are periodically updated using the pension plan asset/liability studies and are part of the determination of the estimates of long-term rates of return. The TVARS asset allocation policy diversifies plan assets across multiple asset classes so as to minimize the risk of large losses. The asset allocation policy is designed to be responsive to changes in the funded status of TVARS. In September 2023, the TVARS Board approved a new asset allocation policy, but had no changes to the 6.50 percent expected return on assets assumption adopted in 2022.

Compensation Increases. Assumptions related to compensation increases are based upon the latest TVA compensation experience study performed in 2023. Future compensation is assumed to likely increase at rates between 3.00 percent and 5.50 percent per year, depending upon the employee's age, and is used to determine the benefit obligations and net periodic benefit cost. The average assumed compensation increase is based upon the current active participants.

Mortality. The mortality assumption is comprised of a base table that represents the current future life expectancy adjusted by an improvement scale to project future improvements in life expectancy. TVA's mortality assumptions are based upon actuarial projections in combination with studies of the actual mortality experience of TVA's pension and post-retirement benefit plan participants while taking into consideration the published Society of Actuaries ("SOA") mortality table and projection scale at September 30, 2023.

The following mortality assumptions were used to determine the benefit obligations for the pension and other post-retirement benefit plans at September 30, 2023, 2022, and 2021. Assumptions used to determine year-end benefit obligations are the assumptions used to determine the subsequent year's net periodic benefit costs.

143

Table of Contents

Mortality Assumptions

At September 30

2023

2022

2021

Mortality table

PRI-2012 Upper Quartile table (adjusted)

PRI-2012 table (adjusted)

Improvement scale

MP-2021 (modified)

MP-2020 (modified)

Health Care Cost Trends. The health care cost trend rates are assumptions about the annual rate of changes in the cost of health care benefits currently provided by the post-retirement benefit plan. In establishing health care cost trend rates, TVA reviews actual recent cost trends and projected future trends considering health care inflation, changes in health care utilization, and changes in plan benefits and premium experience.

Cost of Living Adjustment. COLAs are an increase in the benefits for eligible retirees to help maintain the purchasing power of benefits as consumer prices increase. Eligible retirees receive COLAs on pension and supplemental benefits in January based on a formula linked to the Consumer Price Index for All Urban Consumers ("CPI-U") following any year in which the calculation is at least one percent. Increases in COLA will be the percentage change in average CPI-U for the current 12-month period (November - October) compared to the average CPI-U for the previous 12-month period (November - October) for which a COLA was given, less 0.25 percent, with a 6.00 percent cap for any one year.

TVA's COLA assumption is derived from long-term expectations of the expected future rate of inflation, based upon capital market assumptions, economic forecasts, and the Federal Reserve policy. The actual calendar year COLA and the long- term COLA assumption are used to determine the benefit obligation at September 30 and the net periodic benefit costs for the following fiscal year. The actual calendar year COLAs for 2023, 2022, and 2021 were 6.00 percent, 3.50 percent, and 1.13 percent, respectively.

Sensitivity of Costs to Changes in Assumptions. The following chart reflects the sensitivity of pension cost to changes in certain actuarial assumptions:


Sensitivity to Certain Changes in Pension Assumptions
Actuarial Assumption	Change in Assumption		Impact on 2023 Pension Cost (in millions)		Impact on 2023 Projected Benefit Obligation (in millions)
Discount rate	(0.25)	%	$	12	$	236
Rate of return on plan assets	(0.25)	%	19		N/A
Cost of living adjustments	0.25	%	24		165

Each fluctuation above assumes that the other components of the calculation are held constant and excludes any impact for unamortized actuarial gains or losses.

Plan Investments

In 2021, a new asset allocation policy was put in place to reduce risk and volatility in the TVARS investment portfolio. Furthermore, in September 2023, based on current market conditions and updated capital market assumptions, the asset allocation policy was modified to further progress towards these goals. TVARS investments will be reallocated in a prudent manner over time to move toward the new asset allocation targets. Pursuant to the TVARS Rules and Regulations, any proposed changes in asset allocation that would change TVARS's assumed rate of investment return are subject to the review and veto of the TVA Board. The qualified pension plan assets are invested across growth, defensive-growth, defensive, and inflation-sensitive assets. The TVARS asset allocation policy includes permissible deviations from target allocations, and action can be taken, as appropriate, to rebalance the plan's assets consistent with the asset allocation policy. At September 30, 2023 and 2022, the asset holdings of TVARS included the following:


Asset Holdings of TVARS
			Plan Assets at September 30
Asset Category	Target Allocation		2023		2022
Growth assets	17	%	22	%	20	%
Defensive growth assets	30	%	33	%	34	%
Defensive assets	33	%	17	%	18	%
Inflation-sensitive assets	20	%	28	%	28	%
Total	100	%	100	%	100	%

144

Table of Contents

Fair Value Measurements

The following table provides the fair value measurement amounts for assets held by TVARS at September 30, 2023:


TVA Retirement System At September 30, 2023 (in millions)
	Total(1)(2)		Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Equity securities	$	732	$	731	$	—	$	1

Preferred securities	4		—		4		—

Debt securities
Corporate debt securities	1,109		—		1,107		2
Residential mortgage-backed securities	330		—		323		7
Debt securities issued by U.S. Treasury	602		602		—		—
Debt securities issued by foreign governments	12		—		10		2
Asset-backed securities	173		—		130		43
Debt securities issued by state/local governments	21		—		21		—
Commercial mortgage-backed securities	113		—		108		5

Commingled funds measured at net asset value(3)
Equity	360		—		—		—
Debt	544		—		—		—

Blended	101		—		—		—

Institutional mutual funds	363		363		—		—
Cash equivalents and other short-term investments	315		51		264		—

Private credit funds measured at net asset value(3)	694		—		—		—
Private equity funds measured at net asset value(3)	1,769		—		—		—
Private real asset funds measured at net asset value(3)	1,162		—		—		—


Securities lending collateral	181		—		181		—

Derivatives
Futures	1		1		—		—
Swaps	17		—		17		—

Foreign currency forward receivable	2		—		2		—

Total assets	$	8,605	$	1,748	$	2,167	$	60

Liabilities
Derivatives
Futures	$	5	$	5	$	—	$	—


Swaps	26		—		26		—
Options	1		1		—		—

Securities sold under agreements to repurchase	96		—		96		—

Total liabilities	$	128	$	6	$	122	$	—

Notes

(1) Excludes approximately $167 million in net payables associated with security purchases and sales and various other payables.

(2) Excludes a $181 million payable for collateral on loaned securities in connection with TVARS's participation in securities lending programs.

(3) In accordance with Subtopic 820-10, certain investments that are measured at fair value using the NAV or its equivalent ("alternative investments") have not been classified in the fair value hierarchy. The inputs to these fair value measurements include underlying NAVs, discounted cash flow valuations, comparable market valuations, and adjustments for currency, credit, liquidity, and other risks.

145

Table of Contents

The following table provides the fair value measurement amounts for assets held by TVARS at September 30, 2022:


TVA Retirement System At September 30, 2022 (in millions)
	Total(1)(2)		Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Equity securities	$	709	$	707	$	—	$	2

Preferred securities	6		1		5		—

Debt securities
Corporate debt securities	1,087		—		1,087		—
Residential mortgage-backed securities	293		—		289		4
Debt securities issued by U.S. Treasury	616		616		—		—
Debt securities issued by foreign governments	130		—		130		—
Asset-backed securities	176		—		136		40
Debt securities issued by state/local governments	23		—		23		—
Commercial mortgage-backed securities	161		—		145		16

Commingled funds measured at net asset value(3)
Equity	436		—		—		—
Debt	657		—		—		—

Blended	111		—		—		—

Institutional mutual funds	454		454		—		—
Cash equivalents and other short-term investments	431		133		298		—

Private credit funds measured at net asset value(3)	522		—		—		—
Private equity funds measured at net asset value(3)	1,454		—		—		—
Private real asset funds measured at net asset value(3)	1,080		—		—		—



Securities lending collateral	196		—		196		—

Derivatives
Futures	5		5		—		—
Swaps	17		—		17		—

Foreign currency forward receivable	2		—		2		—

Total assets	$	8,566	$	1,916	$	2,328	$	62

Liabilities
Derivatives
Futures	$	10	$	10	$	—	$	—
Foreign currency forward payable	1		—		1		—

Swaps	54		—		54		—


Securities sold under agreements to repurchase	111		—		111		—

Total liabilities	$	176	$	10	$	166	$	—

Notes

(1) Excludes approximately $100 million in net payables associated with security purchases and sales and various other payables.

(2) Excludes a $196 million payable for collateral on loaned securities in connection with TVARS's participation in securities lending programs.

146

Table of Contents

The following table provides a reconciliation of beginning and ending balances of pension plan assets measured at fair value on a recurring basis where the determination of fair value includes significant unobservable inputs (Level 3):


Fair Value Measurements Using Significant Unobservable Inputs (in millions)
	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Balance at September 30, 2021	$	74
Net realized/unrealized gains (losses)	(4)
Purchases, sales, issuances, and settlements (net)	2
Transfers in and/or out of Level 3	(10)

Balance at September 30, 2022	62
Net realized/unrealized gains (losses)	1
Purchases, sales, issuances, and settlements (net)	2
Transfers in and/or out of Level 3	(5)

Balance at September 30, 2023	$	60

The following descriptions of the valuation methods and assumptions used by the pension plan to estimate the fair value of investments apply to investments held directly by the pension plan. Third-party pricing vendors provide valuations for investments held by the pension plan in most instances, except for commingled, private credit, private equity, and private real asset funds which are priced at NAVs established by the investment managers. In instances where pricing is determined to be based on unobservable inputs, a Level 3 classification has been assigned. Certain securities priced by the investment manager using a proprietary fair value model with unobservable inputs have been classified as Level 3.

Equity and Preferred Securities. Investments listed on either a national or foreign securities exchange or traded in the over-the-counter National Market System are generally valued each business day at the official closing price (typically the last reported sale price) on the exchange on which the security is primarily traded and are classified as Level 1. Equity securities, including common stocks and preferred securities, classified as Level 2 may have been priced by dealer quote or using assumptions based on observable market data, such as yields on bonds from the same issuer or industry. Certain securities priced by the investment manager using unobservable inputs have been classified as Level 3.

Corporate Debt Securities. Corporate bonds are valued based upon recent bid prices or the average of recent bid and asked prices when available (Level 2 inputs) and, if not available, they are valued through matrix pricing models. Matrix pricing, which is a mathematical technique commonly used to price debt securities that are not actively traded, values debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities' relationship to other benchmark quoted securities (Level 2 inputs). Certain securities priced by the investment manager using broker pricing or unobservable inputs have been classified as Level 3.

Mortgage and Asset-Backed Securities. Residential mortgage-backed securities consist of collateralized mortgage obligations ("CMOs") and U.S. pass-through security pools related to government-sponsored enterprises. CMO pricing is typically based on either a volatility-driven, multidimensional, single-cash-flow stream model or an option-adjusted spread model. These models incorporate available market data such as trade information, dealer quotes, market color, spreads, bids, and offers. Pricing for government-sponsored enterprise securities, including the Federal Home Loan Mortgage Corporation, the Federal National Mortgage Association, and the Government National Mortgage Association, is typically based on quotes from the To Be Announced ("TBA") market, which is highly liquid with multiple electronic platforms that facilitate the execution of trading between investors and broker/dealers. Prices from the TBA market are then compared against other live data feeds as well as input obtained directly from the dealer community. Most residential mortgage-backed securities are considered to be priced using Level 2 inputs because of the nature of their market-data-based pricing models. Certain securities priced by vendors using a single broker quote or unobservable inputs have been classified as Level 3.

Debt Securities Issued by U.S. Treasury. For U.S. Treasury securities, fair values reflect the closing price reported in the active market in which the security is traded (Level 1 inputs).

Debt Securities Issued by Foreign Governments. Foreign government bonds and foreign government inflation-linked securities are typically priced based on proprietary discounted cash flow models, incorporating option-adjusted spread features as appropriate. Debt securities issued by foreign governments are classified as Level 2 because of the nature of their market-data-based pricing models. Certain securities priced by the investment manager using broker quotes or unobservable input have been classified as Level 3.

Debt Securities Issued by State and Local Governments. Debt securities issued by state and local governments are

147

Table of Contents

typically priced using market-data-based pricing models, and are therefore classified as Level 2. These pricing models incorporate market data such as quotes, trading levels, spread relationships, and yield curves, as applicable.

Commercial Mortgage-Backed and Asset-Backed Securities. Commercial mortgage-backed and asset-backed securities are typically priced based on a single-cash-flow stream model, which incorporates available market data such as trade information, dealer quotes, market color, spreads, bids, and offers. Because of the market-data-based nature of such pricing models, these securities are typically classified as Level 2. Certain securities priced by investment managers using broker pricing or unobservable inputs have been classified as Level 3.

Commingled Funds. The pension plan invests in commingled funds, which include collective trusts, unit investment trusts, and similar investment funds that predominantly hold debt and/or equity securities as underlying assets. The pension plan's ownership consists of a pro rata share and not a direct ownership of an underlying investment. These commingled funds are valued at their closing NAVs (or unit value) per share as reported by the managers of the commingled funds and as supported by the unit prices of actual purchases and sale transactions occurring as of or close to the financial statement date. These funds have not been classified in the fair value hierarchy in accordance with FASB guidance issued in May 2015.

The pension plan is invested in equity commingled funds, which can be categorized as either passively managed index funds or actively managed funds. The equity index funds seek to track the performance of a particular index by replicating its capitalization and characteristics. Passive fund benchmark indices include the Russell 1000 index and MSCI ACWI ex-U.S. index. The actively managed equity funds seek to outperform certain equity benchmarks through a combination of fundamental and technical analysis. Active funds select portfolio positions based upon their research.

The pension plan is invested in debt commingled funds, which can be categorized as either passively managed index funds or actively managed funds. The pension plan's debt index fund invests in a diversified portfolio of fixed-income securities and derivatives of varying maturities to replicate the characteristics of the Bloomberg Barclays Capital U.S. TIPS. The fund seeks to track the total return of the Bloomberg Barclays Capital U.S. TIPS index. The actively managed debt funds seek to outperform certain fixed-income benchmarks through fundamental research and analysis. The funds invest in a diversified portfolio of fixed income securities and derivatives of varying maturities. Varying by strategy, fund objectives include achieving a positive relative total return through active credit selection and providing risk management through desired strategic exposures.

The pension plan is invested in commingled funds, which invest across multiple asset classes that can be categorized as blended. These funds seek to outperform a passive benchmark through active security selection. The funds invest in securities across equity, fixed income, currency, and commodities. The portfolios employ fundamental, quantitative, and technical analysis.

The pension plan's investments in equity, debt, blended, and commodity commingled funds can generally be redeemed upon notification of the investment managers, with required notice periods varying from same-day to monthly. These investments do not have unfunded commitments.

Institutional Mutual Funds. Investments in institutional mutual funds are valued at prices based on their NAV. Institutional mutual funds have daily published market prices that represent their NAV (or unit value) per share and are classified as Level 1.

Cash Equivalents and Other Short-Term Investments and Certificates of Deposit. Cash equivalents and other short-term investments are highly liquid securities with maturities of less than three months and 12 months, respectively. These consist primarily of discount securities such as commercial paper, repurchase agreements, U.S. Treasury bills, and certain agency securities. These securities, as well as certificates of deposit, may be priced at cost, which approximates fair value due to the short-term nature of the instruments. Model based pricing which incorporates observable inputs may also be utilized. These securities are classified as Level 2. Active market pricing may be utilized for U.S. Treasury bills, which are classified as Level 1.

Private Credit Funds. Private credit limited partnerships are reported at NAVs provided by the fund managers. These funds have not been classified in the fair value hierarchy in accordance with FASB guidance issued in May 2015.

The private credit limited partnerships invest across direct lending, opportunistic credit, and distressed debt strategies. The limited partnerships generally make investments of senior secured first-lien loans, second-lien secured loans, asset-based loans, risk transfer loans, specialty finance loans, unitranche loans, and distressed debt opportunities to middle market private companies. The limited partnerships generally seek to obtain financial returns through high income potential and occasional equity upside. The limited partnerships generally have a term life of five to eight years and are diversified by sector and industry.

Private Equity Funds. Private equity limited partnerships are reported at NAVs provided by the fund managers. These funds have not been classified in the fair value hierarchy in accordance with FASB guidance issued in May 2015.

The private equity limited partnerships typically make longer-term investments in private companies and seek to obtain financial returns through long-term appreciation based on corporate stewardship, improved operating processes, and financial

148

Table of Contents

restructuring which may involve a merger or acquisition. Significant investment strategies include venture capital, buyout, mezzanine or subordinated debt, restructuring or distressed debt, energy infrastructure, and special situations. Venture capital partnerships consist of two main groupings. Early-stage venture capital partnerships invest in businesses still in the conceptual stage where products may not be fully developed and where revenues and/or profits may be several years away. Later-stage venture capital partnerships invest in more mature companies in need of growth or expansion capital. Buyout partnerships provide the equity capital for acquisition transactions either from a private seller or the public, which may represent the purchase of the entire company or a refinancing or recapitalization transaction where equity is invested. Mezzanine or subordinated debt partnerships provide the intermediate capital between equity and senior debt in a buyout or refinancing transaction and typically own a security in the company that carries current interest payments as well as a potential equity interest in the company. Restructuring or distressed debt partnerships purchase opportunities generated by overleveraged or poorly managed companies. Special situation partnerships include organizations with a specific industry focus not covered by the other private equity subclasses or unique opportunities that fall outside the regular subclasses.

The private equity funds have no investment withdrawal provisions prior to the termination of the partnership. Partnerships generally continue 10 to 14 years after the inception of the fund. The partnerships are generally subject to two to three one-year extensions at the discretion of the General Partner. Partnerships can generally be dissolved by an 80 percent vote in interest by all limited partners, with some funds requiring the occurrence of a specific event.

Private Real Asset Investments. The pension plan's ownership in private real asset investments consists of a pro rata share and not a direct ownership of the underlying investments. The fair values of the pension plan's private real asset investments are estimated utilizing NAVs provided by the investment managers. These investments have not been classified in the fair value hierarchy in accordance with FASB guidance issued in May 2015. The investment strategies and methodologies utilized by the investment managers to calculate their NAVs are summarized as follows:

The pension plan is invested in limited partnerships that invest in real estate securities, real estate partnerships, and direct real estate properties. This includes investments in office, multifamily, industrial, and retail investment properties in the U.S. and international markets. The investment strategy focuses on distressed, opportunistic, and value-added opportunities. Partnership investments also include mortgage and/or real estate-related fixed-income instruments and related securities. Investments are diversified by property type and geographic location.

The pension plan is invested in a commingled fund that develops, renovates, and re-leases real estate properties to create value. Investments are predominantly in top tier real estate markets that offer deep liquidity. Property types include residential, office, industrial, hotel, retail, and land. Properties are diversified by geographic region within the U.S. domestic market. The plan is invested in a second commingled fund that invests primarily in core, well-leased, operating real estate properties with a focus on income generation. Investments are diversified by property type with a focus on office, industrial, apartment, and retail. Properties are diversified within the U.S. with an overweight to major market and coastal regions.

Fair value estimates of the underlying investments in these limited partnerships and commingled fund investments are primarily based upon property appraisal reports prepared by independent real estate appraisers within a reasonable amount of time following acquisition of the real estate and no less frequently than annually thereafter. The appraisals are based on one or a combination of three methodologies: cost of reproduction analysis, discounted cash flow analysis, and sales comparison analysis. Pricing for certain investments in mortgage-backed and asset-backed securities is typically based on models that incorporate observable inputs.

The pension plan is invested in energy infrastructure partnerships which acquire essential, long-lived real assets in three main groupings. Upstream assets include oil and gas exploration, drilling, and acquisition. Midstream assets include storage, pipelines, gathering, processing, and transportation of energy commodities. Downstream assets include generation, distribution, and transmission facilities. Additionally, the pension plan is invested in infrastructure partnerships that target mid-sized operating infrastructure companies and/or assets with limited development and construction risk primarily in the energy, transportation and logistics, environmental, telecommunications, and social industries. The partnerships use one or more valuation techniques (e.g., the market approach, the income approach, or the cost approach) for which sufficient and reliable data is available. The use of the market approach generally consists of using comparable market transactions, while the use of the income approach generally consists of the net present value of estimated future cash flows, adjusted as appropriate for liquidity, credit, market, and/or other risk factors.

The pension plan is invested in a private real asset investment trust formed to make direct or indirect investments in commercial timberland properties. Pricing for these types of investments is based on comprehensive appraisals that are conducted shortly after initial purchase of properties and at three-year intervals thereafter. All appraisals are conducted by third-party timberland appraisal firms. Appraisals are based on either a sales comparison analysis or a discounted cash flow analysis.

Securities Lending Collateral. Collateral held under securities lending arrangements is invested in highly liquid short-term securities, primarily repurchase agreements. The securities are often priced at cost, which approximates fair value due to the short-term nature of the instruments. These securities are classified as Level 2.

149

Table of Contents

Derivatives. The pension plan invests in a variety of derivative instruments. The valuation methodologies for these instruments are as follows:

Futures. The pension plan enters into futures. The futures contracts are listed on either a national or foreign securities exchange and are generally valued each business day at the official closing price (typically the last reported sales price) on the exchange on which the security is primarily traded. The pricing is performed by third-party vendors. Since futures are priced by an exchange in an active market, they are classified as Level 1.

Options. The pension plan enters into purchased and written options. Options that are listed on either a national or foreign securities exchange are generally valued each business day at the official closing price (typically the last reported sales price) on the exchange on which the security is primarily traded. These options are classified as Level 1. Options traded over the counter and not on exchanges are priced by third-party vendors and are classified as Level 2.

Swaps. The pension plan enters into various types of swaps. Credit default swaps are priced at market using models that consider cash flows, credit curves, recovery rates, and other factors. The pricing is performed by third-party vendors, and in some cases by clearing exchanges. Interest rate swap contracts are priced at market using forward rates derived from the swap curve, and the pricing is also performed by third-party vendors, and in some cases by clearing exchanges. Other swaps such as equity index swaps and variance swaps are priced by third-party vendors using market inputs such as spot rates, yield curves, and volatility. The pension plan's swaps are generally classified as Level 2 based on the observable nature of their pricing inputs.

Foreign currency forwards. The pension plan enters into foreign currency forwards. All commitments are marked to market daily at the applicable translation rates, and any resulting unrealized gains or losses are recorded. Foreign currency forwards are priced by third-party vendors and are classified as Level 2.

Securities Sold Under Agreements to Repurchase. The pension plan enters into contracts to sell securities to a counterparty at a specified price with an agreement to purchase the same or substantially the same security from the same counterparty at a fixed or determinable price at a future date. Securities sold under agreements to repurchase are presented at their contract price which approximates fair value due to their short-term nature. These securities are classified as Level 2. In connection with sales of securities under agreements to repurchase, the counterparties require the pension plan to maintain collateral securities with a fair value that approximates or exceeds the contract amount of the repurchase agreement. These securities are held in government inflation-linked bonds and classified as government debt securities.

The valuation methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while the pension plan believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date.

Cash Flows

Estimated Future Benefit Payments. The following table sets forth the estimated future benefit payments under the benefit plans.


Estimated Future Benefits Payments At September 30, 2023 (in millions)
	Pension Benefits(1)		Other Post-Retirement Benefits
2024	$	809	$	22
2025	814		21
2026	812		21
2027	812		21
2028	809		21
2029 - 2033	3,918		119

Note

(1) Participants are assumed to receive the Fixed Fund in a lump sum in lieu of available annuity options allowed for certain grandfathered participants resulting in higher estimated pension benefits payments.

Contributions. TVA made contributions to the pension plan of $300 million for 2023 and 2022. TVA has committed to make a minimum contribution of $300 million per year through 2036 or until the plan has reached and remained at 100 percent funded status under the actuarial rules applicable to TVARS. TVA made SERP contributions of $6 million and $8 million for 2023 and 2022, respectively. TVA made cash contributions to the other post-retirement benefit plans of $25 million (net of $4 million in rebates) and $28 million (net of $4 million in rebates) for 2023 and 2022, respectively. TVA expects to contribute $300 million to TVARS, $6 million to the SERP, and $22 million to the other post-retirement benefit plans in 2024.

150

Table of Contents

Other Post-Employment Benefits

Post-employment benefit cost estimates are revised to properly reflect changes in actuarial assumptions made at the end of each year. TVA utilizes a discount rate determined by reference to the U.S. Treasury Constant Maturities corresponding to the calculated average durations of TVA's future estimated post-employment claims payments. The use of a 4.59 percent discount rate resulted in the recognition of $(3) million in expenses in 2023 and an unpaid benefit obligation of $266 million at September 30, 2023. The use of a 3.83 percent discount rate resulted in the recognition of approximately $(40) million in expenses in 2022 and an unpaid benefit obligation of $299 million at September 30, 2022. The use of a 1.52 percent discount rate resulted in the recognition of approximately $(20) million in expenses in 2021 and an unpaid benefit obligation of $340 million at September 30, 2021. The U.S. Department of Labor ("DOL") administers TVA's worker compensation program and invoices TVA annually for claims processed.

The decrease in the unpaid obligation at September 30, 2023, compared to the prior year was due primarily to the increase in the discount rate from 3.83 percent in 2022 to 4.59 percent in 2023 and a decrease in claims. These decreases were partially offset by inflationary impacts on wage and medical costs and an increase in medical utilization previously delayed by the pandemic. The DOL billed TVA $29 million for 2023 claims due in October 2023. TVA estimated claims for 2024 are $28 million.

The decrease in the unpaid obligation at September 30, 2022, compared to the prior year was due primarily to the increase in the discount rate from 1.52 percent in 2021 to 3.83 percent in 2022, decreases in loss experience, and fewer claims partially attributable to delayed medical treatments as a result of the COVID-19 pandemic. TVA paid $29 million for 2022 claims to the DOL in October 2022.

The impact of inflation and interest rates on the post-employment obligation depends on factors beyond TVA's knowledge or control, including the lingering effects of the COVID-19 pandemic, supply chain disruptions, and geographical tensions.

The current portion which represents unpaid losses and administrative fees due are in Accounts payable and accrued liabilities. The long-term portion is recognized in Post-retirement and post-employment benefit obligations.


Amounts Recognized on TVA's Consolidated Balance Sheets At September 30 (in millions)
	2023		2022
Accounts payable and accrued liabilities	$	29	$	29
Post-retirement and post-employment benefit obligations	237		270

21. Collaborative Arrangement

In December 2022, TVA, Ontario Power Generation, BWRX TCA sp. z.o.o., and GE Hitachi Nuclear Energy ("GEH") entered into a multi-party collaborative arrangement to advance the global deployment of the GEH BWRX-300 small modular reactor ("SMR"). GEH is responsible for standard design development. Under the agreement, TVA will contribute up to $88 million for design costs incurred by GEH through 2026. At the time feasibility is determined, TVA will have the right to use the design and may receive additional economic benefits.

Payments pursuant to the agreement are recorded as research and development expense, which is reflected as Operating and maintenance expense on TVA's Consolidated Statements of Operations in the period incurred. TVA recorded $31 million of expenses related to this agreement for the year ended September 30, 2023. TVA also had a $6 million letter of credit posted under this arrangement at September 30, 2023.

22. Commitments and Contingencies

Commitments

Power Purchase Obligations. TVA has contracted with various independent power producers and LPCs for additional capacity to be made available to TVA. Several of these agreements have contractual minimum payments and are accounted for as either finance or operating leases. In total, these agreements provide 4,487 megawatts ("MW") of summer net capability. The remaining terms of the agreements range up to 12 years. Additionally, TVA has contracted with regional transmission organizations to reserve 2,792 MW of transmission service to support purchases from the market and wind PPAs. The remaining terms of these agreements range up to four years. Excluding lease-related costs, TVA incurred $301 million, $318 million, and $202 million of expense under these power purchase and transmission service agreements during 2023, 2022, and 2021, respectively.

151

Table of Contents

TVA has one power purchase agreement that meets the definition of an unconditional purchase obligation. At September 30, 2023, the non-lease portion of the commitment for each of the next five years and thereafter is shown below:


	2024		2025		2026		2027		2028		Thereafter
Unconditional purchase obligation	$	155	$	155	$	155	$	155	$	154	$	541

Under federal law, TVA is obligated to purchase power from qualifying facilities (cogenerators and small power producers). As of September 30, 2023, there was a combined qualifying facility capacity of 285 MW from 955 different generation sources, from which TVA purchased power under this law.

Unfunded Loan Commitments. At September 30, 2023, TVA's commitments under unfunded loan commitments were $1 million for 2024. TVA has no commitments under unfunded loan commitments for 2025 through 2028.

Other Commitments. See Note 8 — Leases, Note 11 — Variable Interest Entities, Note 14 — Debt and Other Obligations, and Note 20 — Benefit Plans for the obligations and commitments attributable to leases, VIEs and membership interests of VIEs subject to mandatory redemption, leaseback obligations, and the retirement plan, respectively.

Contingencies

Nuclear Insurance. Section 170 of the Atomic Energy Act, commonly known as the Price-Anderson Act, provides a layered framework of financial protection to compensate for liability claims of members of the public for personal injury and property damages arising from a nuclear incident in the U.S. This financial protection consists of two layers of coverage. The primary level is private insurance underwritten by American Nuclear Insurers and provides public liability insurance coverage of $450 million for each nuclear power plant licensed to operate. If this amount is not sufficient to cover claims arising from a nuclear incident, the second level, Secondary Financial Protection, applies. Within the Secondary Financial Protection level, the licensee of each nuclear reactor has a contingent obligation to pay a retrospective premium, equal to its proportionate share of the loss in excess of the primary level, regardless of proximity to the incident of fault, up to a maximum of $138 million per reactor per incident. With TVA's seven reactors, the maximum total contingent obligation per incident is $963 million. This retrospective premium is payable at a maximum rate currently set at $20 million per year per nuclear incident per reactor. Currently, 97 reactors are participating in the Secondary Financial Protection program.

In the event that a nuclear incident results in public liability claims, the primary level provided by American Nuclear Insurers combined with the Secondary Financial Protection should provide up to $13.8 billion in coverage.

Federal law requires that each NRC power reactor licensee obtain property insurance from private sources to cover the cost of stabilizing and decontaminating a reactor and its station site after an accident. TVA carries property, decommissioning liability, and decontamination liability insurance from Nuclear Electric Insurance Limited ("NEIL") and European Mutual Association for Nuclear Insurance. The limits available for a loss are up to $2.1 billion for two of TVA's nuclear sites and up to $2.8 billion for the remaining site. Some of this insurance may require the payment of retrospective premiums up to a maximum of $114 million.

TVA purchases accidental outage (business interruption) insurance for TVA's nuclear sites from NEIL. In the event that an accident covered by this policy takes a nuclear unit offline or keeps a nuclear unit offline, NEIL will pay TVA, after a waiting period, an indemnity (a set dollar amount per week) with a maximum indemnity of $490 million per unit. This insurance policy may require the payment of retrospective premiums up to a maximum of $44 million, but only to the extent the retrospective premium is deemed necessary by the NEIL Board of Directors to pay losses unable to be covered by NEIL's surplus.

Decommissioning Costs. TVA recognizes legal obligations associated with the future retirement of certain tangible long-lived assets related primarily to nuclear generating plants, coal-fired generating plants, hydroelectric generating plants/dams, transmission structures, and other property-related assets. See Note 13 — Asset Retirement Obligations.

Nuclear Decommissioning. Provision for decommissioning costs of nuclear generating units is based on options prescribed by the NRC procedures to dismantle and decontaminate the facilities to meet the NRC criteria for license termination. At September 30, 2023, $3.8 billion, representing the discounted value of future estimated nuclear decommissioning costs, was included in nuclear AROs. The actual decommissioning costs may vary from the derived estimates because of, among other things, changes in current assumptions, such as the assumed dates of decommissioning, changes in regulatory requirements, changes in technology, and changes in the cost of labor, materials, and equipment. Utilities that own and operate nuclear plants are required to use different procedures in calculating nuclear decommissioning costs under GAAP than those that are used in calculating nuclear decommissioning costs when reporting to the NRC. The two sets of procedures produce different estimates for the costs of decommissioning primarily because of differences in the underlying assumptions. TVA bases its nuclear decommissioning estimates on site-specific cost studies. The most recent study was approved and implemented in September 2022. Site-specific cost studies are updated for each of TVA's nuclear units at least every five years.

152

Table of Contents

TVA maintains an NDT to provide funding for the ultimate decommissioning of its nuclear power plants. See Note 16 — Fair Value Measurements — Investment Funds. TVA monitors the value of its NDT and believes that, over the long term and before cessation of nuclear plant operations and commencement of decommissioning activities, adequate funds from investments and additional contributions, if necessary, will be available to support decommissioning. TVA's operating nuclear power units are licensed through various dates between 2033 - 2055, depending on the unit. It may be possible to extend the operating life of some of the units with approval from the NRC. See Note 10 — Regulatory Assets and Liabilities — Nuclear Decommissioning Costs and Note 13 — Asset Retirement Obligations.

Non-Nuclear Decommissioning. At September 30, 2023, $3.7 billion, representing the discounted value of future estimated non-nuclear decommissioning costs, was included in non-nuclear AROs. This decommissioning cost estimate involves estimating the amount and timing of future expenditures and making judgments concerning whether or not such costs are considered a legal obligation. Estimating the amount and timing of future expenditures includes, among other things, making projections of the timing and duration of the asset retirement process and how costs will escalate with inflation. The actual decommissioning costs may vary from the derived estimates because of changes in current assumptions, such as the assumed dates of decommissioning, changes in regulatory requirements, changes in technology, and changes in the cost of labor, materials, and equipment. TVA updates its underlying assumptions for non-nuclear decommissioning AROs at least every five years. However, material changes in underlying assumptions that impact the amount and timing of undiscounted cash flows are continuously monitored and incorporated into ARO balances in the period identified.

TVA maintains an ART to help fund the ultimate decommissioning of its non-nuclear power assets. See Note 16 — Fair Value Measurements — Investment Funds. Estimates involved in determining if additional funding will be made to the ART include inflation rate, rate of return projections on the fund investments, and the planned use of other sources to fund decommissioning costs. See Note 10 — Regulatory Assets and Liabilities — Non-Nuclear Decommissioning Costs and Note 13 — Asset Retirement Obligations.

Environmental Matters. TVA's generation activities, like those across the utility industry and in other industrial sectors, are subject to federal, state, and local environmental laws and regulations. Major areas of regulation affecting TVA's activities include air quality control, greenhouse gas ("GHG") emissions, water quality control, and management and disposal of solid and hazardous wastes. Regulations in these major areas continue to become more stringent and have, and will continue to have, a particular emphasis on climate change, renewable generation, and energy efficiency.

TVA has incurred, and expects to continue to incur, substantial capital and operating and maintenance costs to comply with evolving environmental requirements primarily associated with, but not limited to, the operation of TVA's coal-fired and natural gas-fired generating units in general and emissions of pollutants from those units. Environmental requirements placed on the operation of coal-fired and other generating units using fossil fuels such as oil and natural gas will likely continue to become more restrictive over time. Failure to comply with environmental and safety requirements can result in enforcement actions and litigation, which can lead to the imposition of significant civil liability, including fines and penalties, criminal sanctions, and/or temporary or permanent closure of non-compliant facilities. Historical non-compliance can also lead to difficulty in renewing existing permits, as well as difficulty in obtaining permits to bring new generation facilities online. Other obstacles to renewal or permitting of new facilities include a proliferation of non-government organizations seeking to use litigation tools to delay or stop altogether permitting of new fossil fuel facilities in favor of renewable energy projects.

From 1970 to 2023, TVA spent $6.8 billion to reduce emissions from its power plants, including $25 million, $16 million, and $17 million in 2023, 2022, and 2021, respectively, on clean air controls. TVA estimates that compliance with existing Clean Air Act ("CAA") requirements (excluding GHG requirements and new or proposed regulations) could lead to costs of $252 million from 2024 to 2028, which include existing controls capital projects and air operations and maintenance projects. TVA also estimates additional expenditures of $1.6 billion from 2024 to 2028 relating to TVA's CCR Program, as well as expenditures of $190 million from 2024 to 2028 relating to compliance with Clean Water Act ("CWA") requirements. Future costs could differ from these estimates if new environmental laws or regulations become applicable to TVA or the facilities it operates, or if existing environmental laws or regulations are revised or reinterpreted. There could also be costs that cannot reasonably be predicted at this time, due to uncertainty of actions, that could increase these estimates, and these estimates do not include expenditures expected to be incurred after 2028.

Compliance with the EPA's CCR Rule required implementation of a groundwater monitoring program, additional engineering, and ongoing analysis. As further analyses are performed, including evaluation of monitoring results, there is the potential for additional costs for investigation and/or remediation. These costs cannot reasonably be predicted until a final remedy is selected where required.

Liability for releases, natural resource damages, and required cleanup of hazardous substances is primarily regulated by the federal Comprehensive Environmental Response, Compensation, and Liability Act ("CERCLA"), the Resource Conservation and Recovery Act ("RCRA"), and other federal and parallel state statutes. In a manner similar to many other governmental entities, industries, and power systems, TVA has generated or used hazardous substances over the years. TVA operations at some facilities have resulted in releases of contaminants that TVA has addressed or is addressing consistent with state and federal requirements. At September 30, 2023 and 2022, TVA's estimated liability for required cleanup and similar environmental work for those sites for which sufficient information is available to develop a cost estimate was $16 million and $17

153

Table of Contents

million, respectively, on a non-discounted basis, and was included in Accounts payable and accrued liabilities and Other long-term liabilities on the Consolidated Balance Sheets. Additionally, the potential inclusion of new hazardous substances under CERCLA and RCRA jurisdiction could significantly affect TVA's future liability for remediating historical releases.

Potential Liability Associated with Workers' Exposure to CCR Materials. In response to the 2008 ash spill at Kingston, TVA hired Jacobs Engineering Group, Inc. ("Jacobs") to oversee aspects of the cleanup. After the cleanup was completed, Jacobs was sued in the U.S. District Court for the Eastern District of Tennessee ("Eastern District") by employees of a contractor involved in the cleanup and family members of some of the employees. The plaintiffs alleged that Jacobs failed to take or provide proper health precautions and misled workers about the health risks associated with exposure to coal fly ash, which is a CCR material. The plaintiffs also alleged that exposure to the fly ash caused significant illnesses, including in some cases death. Other contractor employees and family members also filed lawsuits against Jacobs in the Eastern District. In the third quarter of 2023, Jacobs announced that it reached a global settlement that resolved all of these lawsuits. While TVA was not a party to any of these lawsuits, TVA may potentially have an indemnity obligation to reimburse Jacobs in some circumstances. TVA does not expect any potential liability to have a material adverse impact on its results of operations or financial condition.

Legal Proceedings

General. At September 30, 2023, TVA had accrued $28 million of probable losses with respect to Legal Proceedings. Of the accrued amount, $10 million is included in Other long-term liabilities and $18 million is included in Accounts payable and accrued liabilities. No assurance can be given that TVA will not be subject to significant additional claims and liabilities. If actual liabilities significantly exceed the estimates made, TVA's results of operations, liquidity, and financial condition could be materially adversely affected.

Environmental Agreements. On April 14, 2011, TVA entered into two substantively similar agreements, one with the EPA and the other with Alabama, Kentucky, North Carolina, Tennessee, and three environmental advocacy groups (collectively, the "Environmental Agreements"). To resolve alleged New Source Review claims, TVA committed under the Environmental Agreements to, among other things, take now-completed actions regarding coal units and invest $290 million in certain TVA environmental projects. Of this amount, TVA had spent approximately $283 million as of September 30, 2023. Additionally, TVA holds restricted cash in an interest earning trust to fund the remaining project commitments. Any interest earned through the trust must also be spent on agreed upon environmental projects. The total remaining committed costs, including interest earned through the trust, were approximately $8 million as of September 30, 2023.

The liabilities related to the Environmental Agreements are included in Accounts payable and accrued liabilities and Other long-term liabilities on the September 30, 2023, Consolidated Balance Sheets. In conjunction with the approval of the Environmental Agreements, the TVA Board determined that it was appropriate to record TVA's obligations under the Environmental Agreements as regulatory assets, and they are included as such on the September 30, 2023, Consolidated Balance Sheets and will be recovered in rates in future periods.

Case Involving Johnsonville Aeroderivative Combustion Turbine Project. On December 22, 2022, the Southern Environmental Law Center filed a lawsuit in the U.S. District Court for the Middle District of Tennessee on behalf of the Sierra Club, alleging that TVA violated the National Environmental Policy Act ("NEPA") in deciding to build a new aeroderivative combustion turbine project at its Johnsonville facility.

The Sierra Club claims that TVA violated NEPA by failing to adequately analyze the climate consequences of the project, adequately address GHG mitigation in light of EOs to decarbonize the power sector, consider a reasonable range of alternatives to the project, and prepare an environmental impact statement ("EIS").

The Sierra Club requests the federal court to enter a declaratory judgment that TVA's environmental assessment ("EA") violates NEPA and that TVA's decision to issue a finding of no significant impact ("FONSI") was arbitrary, vacate the EA and FONSI, order TVA to prepare an EIS, and prohibit further construction and operation of the combustion turbines until TVA has complied with NEPA. On March 20, 2023, TVA moved to dismiss the case, and that motion remains pending before the court. In addition, on October 23, 2023, TVA and the plaintiffs filed cross-motions for summary judgment. TVA cannot predict the outcome of this litigation.

Case Involving Cumberland Combined Cycle Plant. On June 14, 2023, Appalachian Voices, the Center for Biological Diversity, and the Sierra Club filed a lawsuit in the United States District Court for the Middle District of Tennessee alleging that TVA violated NEPA in deciding to build a 1,450 MW combined cycle plant at its Cumberland facility. The plaintiffs request the court, among other things, to enter a declaratory judgment that the Cumberland EIS violated NEPA and TVA's decision to issue the Cumberland Record of Decision was arbitrary, capricious, and/or not in accordance with law; enter a declaratory judgment that TVA’s failure to supplement the Cumberland EIS violated NEPA and was arbitrary, capricious, and/or not in accordance with law; vacate the Cumberland EIS and the Cumberland Record of Decision; order TVA to prepare a revised draft EIS or

154

Table of Contents

supplemental EIS subject to public comment that corrects the NEPA violations identified by the plaintiffs; and enjoin further construction and operation of the Cumberland combined cycle plant until TVA has complied with NEPA. TVA filed an amended answer on September 14, 2023. TVA cannot predict the outcome of this litigation.

23. Related Parties

TVA is a wholly-owned corporate agency of the federal government, and because of this relationship, TVA's revenues and expenses are included as part of the federal budget as a revolving fund. TVA's purpose and responsibilities as an agency are described under the "Other Agencies" section of the federal budget.

TVA's power program and stewardship (nonpower) programs were originally funded primarily by appropriations from Congress. In 1959, Congress passed an amendment to the TVA Act that required TVA's power program to be self-financing from power revenues and proceeds from power program financings. While TVA's power program did not directly receive appropriated funds after it became self-financing, TVA continued to receive appropriations for certain multipurpose and other nonpower mission-related activities as well as for its stewardship activities. TVA has not received any appropriations from Congress for any activities since 1999, and since that time, TVA has funded stewardship program activities primarily with power revenues.

The 1959 amendment to the TVA Act also required TVA, beginning in 1961, to make annual payments to the U.S. Treasury from net power proceeds as a repayment of and as a return on the Power Program Appropriation Investment until a total of $1.0 billion of the Power Program Appropriation Investment has been repaid in accordance with the 1959 amendment. TVA fulfilled its requirement to repay $1.0 billion of the Power Program Appropriation Investment in 2014. The TVA Act requires TVA to continue making payments to the U.S. Treasury as a return on the remaining $258 million of the Power Program Appropriation Investment.

TVA paid the U.S. Treasury $6 million, $4 million, and $4 million in 2023, 2022, and 2021, respectively, as a return on the Power Program Appropriation Investment. The amount of the return on the Power Program Appropriation Investment is based on the Power Program Appropriation Investment balance at the beginning of that year and the computed average interest rate payable by the U.S. Treasury on its total marketable public obligations at the same date. The interest rates payable by TVA on the Power Program Appropriation Investment were 1.99 percent, 1.47 percent, and 1.64 percent for 2023, 2022, and 2021, respectively.

TVA also has access to a financing arrangement with the U.S. Treasury pursuant to the TVA Act. TVA and the U.S. Treasury entered into a memorandum of understanding under which the U.S. Treasury provides TVA with a $150 million credit facility. This credit facility has a maturity date of September 30, 2024, and is typically renewed annually. Access to this credit facility or other similar financing arrangements has been available to TVA since the 1960s. See Note 14 — Debt and Other Obligations — Credit Facility Agreements.

In the normal course of business, TVA contracts with other federal agencies for sales of electricity and other services. Transactions with agencies of the federal government were as follows:


Related Party Transactions At or for the years ended September 30 (in millions)
	2023		2022		2021
Revenue from sales of electricity	$	120	$	134	$	109
Other income	282		296		280

Expenditures
Operating expenses	234		228		214
Additions to property, plant, and equipment	8		11		10
Cash and cash equivalents	31		30		30
Accounts receivable, net	87		78		65
Investment funds	391		358		573
Long-term accounts receivable	38		43		31
Accounts payable and accrued liabilities	42		42		15
Long-term power bonds, net	1		1		1
Return on power program appropriation investment	6		4		4

155

Table of Contents

Report of Independent Registered Public Accounting Firm

To the Board of Directors of Tennessee Valley Authority

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Tennessee Valley Authority (the Company) as of September 30, 2023 and 2022, the related consolidated statements of operations, comprehensive income (loss), proprietary capital and cash flows for each of the three years in the period ended September 30, 2023, and the related notes (collectively referred to as the consolidated financial statements). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at September 30, 2023 and 2022, and the results of its operations and its cash flows for each of the three years in the period ended September 30, 2023, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of September 30, 2023, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated November 13, 2023 expressed an unqualified opinion thereon.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.


Critical Audit Matters The critical audit matters communicated below are matters arising from the current period audit of the financial statements that were communicated or required to be communicated to the Audit, Finance, Risk, and Cybersecurity Committee and that: (1) relate to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which they relate.
						Valuation of Pension Benefit and Other Post-Retirement Benefit Obligations
Description of the Matter						At September 30, 2023, the Company’s pension benefit obligation was $10.1 billion and the Company’s other post-retirement benefit obligation was $347 million. The Company utilizes certain actuarial assumptions to measure the pension benefit and other post-retirement benefit obligations at September 30, as more fully described in Note 20 to the consolidated financial statements. Auditing the pension benefit and other post-retirement benefit obligations was complex due to the judgmental nature of the assumptions used in the Company’s measurement process, including the discount rates, mortality rates, projected health care cost trend rates, and cost of living adjustments. These assumptions have a significant effect on the projected pension benefit and other post-retirement benefit obligations.

156

Table of Contents



How We Addressed the Matter in Our Audit						We obtained an understanding, evaluated the design and tested the operating effectiveness of controls over the pension benefit and other post-retirement benefit obligations valuation process. For example, we tested controls over management’s review of the pension benefit and other post-retirement benefit obligations calculations, the relevant data inputs, and the significant actuarial assumptions described above. To test the valuation of the pension benefit and other post-retirement benefit obligations, our audit procedures included, with the assistance of actuarial specialists, evaluating the methodologies used, the significant actuarial assumptions described above, and the underlying data used by the Company, among other procedures. We compared the actuarial assumptions used by the Company to historical trends. We evaluated the Company’s methodology for determining the discount rates that reflect the maturity and duration of the benefit payments and that are used to estimate the pension benefit and other post-retirement benefit obligations. To evaluate the projected health care cost trend rates, the cost of living adjustments, and the mortality rates, we assessed whether the information was consistent with publicly available information, and whether any market data adjusted for entity-specific adjustments was applied. We also tested the completeness and accuracy of the underlying data, including the participant data, used in the determination of the projected pension benefit and other post-retirement benefit obligations.


						Valuation of Alternative Investments
Description of the Matter						At September 30, 2023, the Company had $4.1 billion in investment funds and $8.1 billion in plan investments related to the defined benefit pension plan. Approximately 55% and 57% of investment funds and plan investments, respectively, are invested in private equity funds, private real asset funds, private credit funds, and commingled funds. These types of investments are referred to as “alternative investments.” These alternative investments are measured at fair value using the net asset value (“NAV”) (or its equivalent) as more fully described in Note 16, for investment funds, and Note 20, for plan investments, to the consolidated financial statements. Auditing the valuation of alternative investments was challenging because of the higher estimation uncertainty of the inputs to the fair value measurements, including the underlying NAVs, discounted cash flow valuations, comparable market valuations, and adjustments for currency, credit, liquidity, and other risks. Additionally, certain information regarding the fair value of these alternative investments was based on unaudited information available to management at the time of valuation.
How We Addressed the Matter in Our Audit						We obtained an understanding, evaluated the design and tested the operating effectiveness of controls over the Company’s alternative investments’ valuation process. For example, we tested controls over management's review of the alternative investment valuation, which included a comparison of returns to benchmarks and monitoring of investment managers’ valuation policies and procedures, as well as portfolio performance. To test the valuation of the alternative investments, our audit procedures included, among others, comparing fund returns to selected relevant benchmarks and understanding variations as well as comparing fair values from the most recent audited financial statements to the Company's estimated fair values. We obtained an understanding of the changes to the investment portfolio and changes in investment strategies. We assessed the historical accuracy of management's estimates by comparing actual fair values to previous estimates. We evaluated for contrary evidence by confirming the fair values of the investments and ownership interest directly with the trustee and with a sample of investment managers.

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 2007

Chattanooga, Tennessee

November 13, 2023

157

Table of Contents

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

Not applicable.

ITEM 9A. CONTROLS AND PROCEDURES

Disclosure Controls and Procedures

TVA maintains disclosure controls and procedures designed to ensure that information required to be disclosed by TVA in reports that it files or submits under the Securities Exchange Act of 1934 (the "Exchange Act") is recorded, processed, summarized, and reported, within the time periods specified in the Securities and Exchange Commission's rules and forms, and is accumulated and communicated to TVA's management, as appropriate, to allow timely decisions regarding required disclosure. TVA's management, including the President and Chief Executive Officer, the Executive Vice President and Chief Financial and Strategy Officer, and members of the Disclosure Control Committee, including the Vice President and Controller (Principal Accounting Officer) (collectively "management"), evaluated the effectiveness of TVA's disclosure controls and procedures (as defined in Rule 13a-15(e) under the Exchange Act) as of September 30, 2023. Based on this evaluation, management concluded that TVA's disclosure controls and procedures were effective as of September 30, 2023.

Internal Control over Financial Reporting

(a)Management's Annual Report on Internal Control over Financial Reporting

TVA's management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Exchange Act Rule 13a-15(f) and required by Section 404 of the Sarbanes-Oxley Act. TVA's internal control over financial reporting is designed to provide reasonable, but not absolute, assurance regarding the reliability of financial reporting and the preparation of financial statements in accordance with generally accepted accounting principles generally accepted in the United States of America ("GAAP"). Because of the inherent limitations in all control systems, internal control over financial reporting and systems may not prevent or detect misstatements.

TVA's management, including the President and Chief Executive Officer, the Executive Vice President and Chief Financial and Strategy Officer, and members of the Disclosure Control Committee, including the Vice President and Controller (Principal Accounting Officer), evaluated the design and effectiveness of TVA's internal control over financial reporting as of September 30, 2023, based on the framework in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, TVA's management concluded that TVA's internal control over financial reporting was effective as of September 30, 2023.

Although the effectiveness of internal control over financial reporting was not required to be subject to attestation by TVA's independent registered public accounting firm, TVA has chosen to obtain such a report. Ernst & Young LLP, the independent registered public accounting firm that audited the financial statements included in this Annual Report, has issued an attestation report on TVA's internal control over financial reporting.

(b)Changes in Internal Control over Financial Reporting

During the quarter ended September 30, 2023, there were no changes in TVA's internal control over financial reporting that materially affected, or are reasonably likely to materially affect, TVA's internal control over financial reporting.

158

Table of Contents

Report of Independent Registered Public Accounting Firm

To the Board of Directors of Tennessee Valley Authority

Opinion on Internal Control over Financial Reporting

We have audited Tennessee Valley Authority’s internal control over financial reporting as of September 30, 2023, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, Tennessee Valley Authority (the Company) maintained, in all material respects, effective internal control over financial reporting as of September 30, 2023, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of the Company as of September 30, 2023, and 2022, the related consolidated statements of operations, comprehensive income (loss), changes in proprietary capital and cash flows for each of the three years in the period ended September 30, 2023, and the related notes and our report dated November 13, 2023 expressed an unqualified opinion thereon.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Annual Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Ernst & Young LLP

Chattanooga, Tennessee

November 13, 2023

159

Table of Contents

ITEM 9B. OTHER INFORMATION

Insider Trading Arrangements and Policies

During the three months ended September 30, 2023, no director or officer of TVA notified TVA of the adoption or termination of a "Rule 10b5-1 trading arrangement" or "non-Rule 10b5-1 trading arrangement," as each term is defined in Item 408(a) of Regulation S-K.

2024 CEO Compensation

On November 9, 2023, the TVA Board approved no adjustment to the salary of Chief Executive Officer ("CEO") Jeffrey J. Lyash for 2024.

The following sets forth the components of Mr. Lyash's 2024 target total direct compensation ("TDC"), effective October 1, 2023:

•Salary remained the same at $1,227,000.

•Long-term performance ("LTP") grant of $3,983,000, which will vest on September 30, 2026.

•Long-term retention ("LTR") grant of $1,707,000, which will vest in three equal increments on September 30, 2024, September 30, 2025, and September 30, 2026.

No adjustments were made to any other existing elements of compensation for Mr. Lyash for 2024.

Compensation Adjustments for Other NEOs

On November 9, 2023, CEO Jeffrey J. Lyash approved compensation adjustments for the following Named Executive Officers ("NEOs") for 2024. (Biographical information for each is set out in Item 10, Directors, Executive Officers, and Corporate Governance.) The following sets forth salary increases and incentive awards granted for 2024, effective October 1, 2023:

John M. Thomas, III

•Salary increased from $835,380 to $860,411.

•LTP grant of $1,425,000, which will vest on September 30, 2026.

•LTR grant of $700,000, which will vest in three equal increments on September 30, 2024, September 30, 2025, and September 30, 2026.

Donald A. Moul

•Salary increased from $795,600 to $819,468.

•LTP grant of $1,425,000, which will vest on September 30, 2026.

•LTR grant of $852,000, which will vest in three equal increments on September 30, 2024, September 30, 2025, and September 30, 2026.

Timothy S. Rausch

•Salary increased from $637,640 to $663,146.

•LTP grant of $725,000, which will vest on September 30, 2026.

•LTR grant of $375,000, which will vest in three equal increments on September 30, 2024, September 30, 2025, and September 30, 2026.

David B. Fountain

•Salary increased from $629,802 to $648,696.

•LTP grant of $1,000,000, which will vest on September 30, 2026.

•LTR grant of $414,000, which will vest in three equal increments on September 30, 2024, September 30, 2025, and September 30, 2026.

No adjustments were made to any other existing elements of compensation for these NEOs for 2024.

ITEM 9C. DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS

Not applicable.

160

Table of Contents

PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS, AND CORPORATE GOVERNANCE

Directors

The Tennessee Valley Authority Act of 1933, as amended (the "TVA Act") provides that the Tennessee Valley Authority ("TVA") will be administered by a board of nine part-time members appointed by the President of the United States ("U.S.") with the advice and consent of the U.S. Senate. The Chair of the TVA Board of Directors ("TVA Board") is selected by the members of the TVA Board. Under the TVA Act, to be eligible to be appointed as a member of the TVA Board, an individual (i) must be a U.S. citizen; (ii) must have management expertise relative to a large for-profit or nonprofit corporate, government, or academic structure; (iii) cannot be a TVA employee; (iv) must make a full disclosure to Congress of any investment or other financial interest that the individual holds in the energy industry; and (v) must affirm support for the objectives and missions of TVA, including being a national leader in technological innovation, low-cost power, and environmental stewardship. In addition, the President of the U.S., in appointing members of the TVA Board, must (i) consider recommendations from other public officials such as the Governors of the states in TVA's service area; individual citizens; business, industrial, labor, electric power distribution, environmental, civic, and service organizations; and the congressional delegations of the states in TVA's service area; and (ii) seek qualified members from among persons who reflect the diversity, including geographical diversity, and needs of TVA's service area. At least seven of the nine TVA Board members must be legal residents of the TVA service area. Currently, TVA has nine active TVA Board members.

TVA Board members serve five-year terms, and at least one member's term ends each year. After a member's term ends, the member is permitted under the TVA Act to remain in office until the earlier of the end of the then-current session of Congress or the date a successor takes office. The TVA Board, among other things, establishes broad goals, objectives, and policies for TVA; develops long-range plans to guide TVA in achieving these goals, objectives, and policies; approves annual budgets; and establishes a compensation plan for employees.

The terms of A.D. Frazier and Jeff W. Smith as members of the TVA Board ended January 3, 2023, with the

The TVA Board as of November 13, 2023, consisted of the following nine individuals with their ages and terms of office provided:


Directors	Age	Year Current Term Began	Year Term Expires
Joe H. Ritch(1)	73	2023	2025
Beth P. Geer	58	2023	2026
Beth H. Harwell	66	2021	2024
William B. Kilbride	72	2019	2023
Robert P. Klein	72	2023	2026
L. Michelle Moore	51	2023	2026
Brian E. Noland	55	2020	2024
William J. Renick	70	2023	2027
A. Wade White	55	2023	2027

Notes

(1) Mr. Ritch assumed the Board Chair role on November 7, 2023.

Mr. Ritch of Huntsville, Alabama, joined the TVA Board in January 2023 and assumed the role of Board Chair in November 2023. He previously served on the TVA Board from January 2013 to January 2017 and as Board Chair from May 2014 to January 2017. He has been an attorney at Dentons Sirote, PC, a law firm in Huntsville, Alabama, and its predecessor firm, since June 1982. He has served as chair of the Redstone Regional Alliance since 1994, as a director of Axometrics, which provides polarization measurement solutions, since 2002, and as a member of the Alabama School of Cyber Technology and Engineering Foundation since 2018. He formerly served on various corporate boards primarily in the technology, aerospace, and defense industries, including Perkins Technical Services, Inc. and CAS Inc., as well as many non-profit boards, including

the Board of Trustees of the University of Alabama System, of which he is now a Trustee Emeritus, and the Huntsville/Madison County Chamber of Commerce. He has received numerous business and community awards and was inducted into the Alabama Business Hall of Fame in 2021.

161

Table of Contents

Ms. Geer of Brentwood, Tennessee, joined the TVA Board in January 2023. She has served as the chief of staff to former Vice President Al Gore since May 2012 and has served on the Nashville Sustainability Advisory Committee since February 2020. She has extensive policy experience in climate change and environmental justice, having previously served in roles in the Clinton-Gore White House, U.S. Department of Labor, and the U.S. Senate.

Dr. Harwell of Nashville, Tennessee, joined the TVA Board in January 2021. She has served as a distinguished visiting professor at Middle Tennessee State University since the fall of 2019. She previously served as the speaker of the Tennessee House of Representatives, from 2011 until 2019, while serving as a state representative for the 56th District of Tennessee for nearly 30 years. She has also chaired the Tennessee Republican Party and served as an assistant professor of political science at Belmont University, as well as in a variety of additional roles in both education and public service.

Mr. Kilbride of Chattanooga, Tennessee, joined the TVA Board in August 2019 and served as Board Chair from August 2021 to November 2023. He served as the president and CEO of the Chattanooga Area Chamber of Commerce from July 2014 until his retirement in January 2017, where he led multiple initiatives to attract and retain business to southeast Tennessee. He previously served as the president of the Mohawk Home, a division of Mohawk Industries, Inc. from 1992 to 2014 after earlier holding positions with Chemical Bank, Dean Witter Reynolds Financial Services, and the New York Stock Exchange.

Mr. Klein of Chattanooga, Tennessee, joined the TVA Board in January 2023. He retired in November 2015 as former vice president of the International Brotherhood of Electrical Workers, a role he assumed after a decades-long career as a lineman and foreman for the Electric Power Board of Chattanooga. He also served as president of the Tennessee Valley Trades and Labor Council for 14 years, as well as on the TVA Labor-Management Committee, and served honorably in the Tennessee Army National Guard.

Ms. Moore of Midlothian, Virginia, joined the TVA Board in January 2023. Since June 2015, she has served as CEO of Groundswell, a nonprofit that builds community power to reduce energy burdens and expand economic opportunity. She is the author of Rural Renaissance, and from her roots in rural Georgia, she has worked to connect clean energy with affordability and quality of life for more than 25 years, including leading federal sustainability and infrastructure project delivery for the Obama White House.

Dr. Noland of Johnson City, Tennessee, joined the TVA Board in December 2020. Since January 2012, he has served as the ninth president of East Tennessee State University. He previously served as Chancellor of the West Virginia Higher Education System for six years. In addition, he serves on the NCAA Division I Board of Directors as well as the boards of Ballad Health and the Bank of Tennessee.

Mr. Renick of Ashland, Mississippi, joined the TVA Board in January 2023. He served as senior advisor for the Mississippi Office of Workforce Development from July 2021 to June 2022 and served as Workforce Division Director at Three Rivers Planning and Development District in Pontotoc, Mississippi, from June 2008 to June 2021. In April 2023, he became a member of the Board of Directors of the CREATE Foundation in Tupelo, Mississippi, and he also serves as the chair of the CREATE Foundation's Commission on the Future of Northeast Mississippi. A longtime public servant, Mr. Renick has served in multiple local and state elected and appointed positions, as well as in the private sector.

Mr. White of Eddyville, Kentucky, joined the TVA Board in January 2023. He has served with Farmers Bank and Trust Company in Princeton, Kentucky, in business development and public relations, since January 2023. He previously served as a senior claims specialist with Progressive Insurance Company in Louisville, Kentucky, from January 2022 to December 2022, and as Lyon County Judge Executive from January 2011 to December 2022.

Executive Officers

TVA's executive officers as of November 13, 2023, their titles, their ages, and the date their employment with TVA commenced are as follows:


Executive Officers	Title	Age	Employment Commenced
Jeffrey J. Lyash	President and Chief Executive Officer	62	2019
John M. Thomas, III	Executive Vice President and Chief Financial and Strategy Officer	59	2005
Donald A. Moul	Executive Vice President and Chief Operating Officer	58	2021
Timothy S. Rausch	Executive Vice President and Chief Nuclear Officer	59	2018
David B. Fountain	Executive Vice President and General Counsel	56	2020
Susan E. Collins	Executive Vice President and Chief Human Resources and Administrative Officer	57	2014
Jeannette Mills	Executive Vice President and Chief External Relations Officer	56	2020
Diane T. Wear	Vice President and Controller	55	2008

162

Table of Contents

Mr. Lyash has served as TVA's President and CEO since April 2019. He previously served as the President and Chief Executive Officer of Ontario Power Generation Inc. ("OPG"), an electric utility, from August 2015 until April 2019. Prior to joining OPG, Mr. Lyash served as the President of the Power Business Unit of Chicago Bridge & Iron Company N.V., an engineering, procurement, and construction company, from July 2013 to August 2015, as Executive Vice President of Energy Supply for Duke Energy Corporation, an electric utility, from July 2012 to December 2012, and as Executive Vice President of Energy Supply for Progress Energy, Inc. ("Progress Energy"), an electric utility, from June 2010 to July 2012. Mr. Lyash joined Progress Energy (formerly Carolina Power & Light Company) in 1993 and held a number of other positions before assuming the role of Executive Vice President of Energy Supply, including Executive Vice President of Corporate Development from July 2009 to June 2010, President and Chief Executive Officer of Progress Energy Florida, Inc., from June 2006 to July 2009, Senior Vice President of Energy Delivery for Progress Energy Florida, Inc., from November 2003 to June 2006, and Vice President of Transmission for Progress Energy Carolinas, Inc., from January 2002 to October 2003. He also held a wide range of management and executive roles in Progress Energy's nuclear program, including Operations Manager, Engineering Manager, Plant Manager, and Director of Site Operations. Mr. Lyash began his career in the utility industry in 1981 and worked for Pennsylvania Power & Light before joining the U.S. Nuclear Regulatory Commission ("NRC"), where he worked from 1984 to 1993. While at the NRC, Mr. Lyash held a number of senior technical and management positions and also worked from June 1984 to May 1985 as an engineer at Browns Ferry Nuclear Plant while on loan to TVA.

Mr. Thomas was named Executive Vice President and Chief Financial and Strategy Officer ("CFSO") in June 2021. Mr. Thomas served as Executive Vice President and CFO from February 2012 to June 2021, as CFO from June 2010 to February 2012, as Executive Vice President of People and Performance from January 2010 to June 2010, as Senior Vice President, Corporate Governance and Compliance from July 2009 to January 2010, as Controller and Chief Accounting Officer from January 2008 to September 2009, and as the General Manager, Operations Business Services from November 2005 to January 2008. Prior to joining TVA, Mr. Thomas was CFO during 2005 for Benson Security Systems. He was also the Controller of Progress Fuels Corporation from 2003 to 2005 and Controller of Progress Ventures, Inc. from 2001 to 2002, both subsidiaries of Progress Energy.

Mr. Rausch was named Executive Vice President and Chief Nuclear Officer in November 2020. Mr. Rausch joined TVA in October 2018 as Senior Vice President and Chief Nuclear Officer. Before joining TVA, Mr. Rausch served as the Senior Vice President and Chief Nuclear Officer of Talen Energy Corporation from June 2015 until September 2018 and as the Senior Vice President and Chief Nuclear Officer of PPL Generation, LLC from July 2009 to June 2015. Mr. Rausch has 25 years of experience in virtually all the disciplines of the nuclear power industry, including roles as Site Vice President, Plant General Manager, and Director of Engineering.

Mr. Fountain was named Executive Vice President and General Counsel in March 2021. Mr. Fountain joined TVA in June 2020 as the Senior Vice President and Vice General Counsel. Prior to joining TVA, Mr. Fountain served in various leadership roles for more than 20 years with Duke Energy and predecessor companies Progress Energy and Carolina Power & Light. Most recently, Mr. Fountain served as Senior Vice President, Legal, Corporate Secretary, and Chief Ethics and Compliance Officer at Duke Energy from November 2018 to May 2020 and as President of Duke Energy North Carolina from August 2015 to November 2018.

Mr. Moul was named Executive Vice President and Chief Operating Officer in June 2021. Before joining TVA, Mr. Moul served as the Executive Vice President, Nuclear Division and Chief Nuclear Officer at NextEra Energy Inc. from January 2020 to May 2021 and as the Vice President and Chief Nuclear Officer of NextEra Energy Inc. from May 2019 to December 2019. He previously held various roles at several subsidiaries of FirstEnergy Corp. Mr. Moul served as Executive on Special Assignment of FirstEnergy Solutions Corp. from March 2019 to May 2019, President and Chief Nuclear Officer of FirstEnergy Generation Companies from March 2018 to March 2019, President of FirstEnergy Generation LLC from April 2017 to March 2018, and Senior Vice President, Fossil Operations and Environmental of FirstEnergy Solutions from August 2015 to April 2017.

Ms. Collins was named Executive Vice President and Chief Human Resources and Administrative Officer in July 2023. Ms. Collins joined TVA in May 2014 as Vice President of Human Resources, was named Senior Vice President and Chief Human Resources Officer in February 2016, was named Senior Vice President, Chief Human Resources and Communications Officer in June 2019, and was named Executive Vice President and Chief People and Communications Officer in November 2020. Before joining TVA, Ms. Collins served as Senior Vice President of Human Resources for Constellation Energy Nuclear Group, LLC from 2009 to 2014 and as Vice President of Human Resources for Constellation Energy from 2008 to 2009.

Ms. Mills was named TVA's Executive Vice President and Chief External Relations Officer in February 2020. Most recently, from 2017 until arriving at TVA, Ms. Mills served as the Senior Vice President of Safety, Health, Environmental and Assurance for the U.S. region at National Grid Group, the United Kingdom's largest investor-owned utility. Beginning in June 2015, she served as a Commissioner on the Maryland Public Service Commission, providing regulatory oversight of gas, electric, telephone, water, sewage disposal, and transportation companies. Ms. Mills spent 25 years of her career at Baltimore Gas and Electric, starting as an associate engineer and steadily progressing through positions of increasing responsibility to ultimately serve as Vice President, Customer Operations and Chief Customer Officer from 2008 to 2013.

Ms. Wear has served as TVA's Vice President and Controller since March 2012. Ms. Wear was the Assistant Controller from February 2010 to March 2012. Between April 2008, when she joined TVA, and February 2010, Ms. Wear was the General

163

Table of Contents

Manager, External Reporting/Accounting Policy and Research. Prior to joining TVA, Ms. Wear was a Managing Director at PricewaterhouseCoopers LLP. Ms. Wear joined a predecessor firm to PricewaterhouseCoopers LLP in January 1992.

Disclosure and Financial Code of Ethics

TVA has a Disclosure and Financial Ethics Code ("Financial Ethics Code") that applies to all executive officers (including the CEO, CFO, and Controller) and directors of TVA as well as to all employees who certify information contained in quarterly reports or annual reports or who have responsibility for internal control self-assessments. The Financial Ethics Code includes provisions covering conflicts of interest, ethical conduct, compliance with applicable laws, rules, and regulations, responsibility for full, fair, accurate, timely, and understandable disclosures, and accountability for adherence to the Financial Ethics Code. TVA will provide a current copy of the Financial Ethics Code to any person, without charge, upon request. Requests may be made by calling 888-882-4975 or by sending an e-mail to: investor@tva.com. Any waivers of or changes to provisions of the Financial Ethics Code that require disclosure pursuant to applicable Securities and Exchange Commission requirements will be promptly disclosed to the public, subject to limitations imposed by law, on TVA's website at: www.tva.com. Information contained on TVA's website shall not be deemed to be incorporated into, or to be a part of, this Annual Report.

Insider Trading Policy

TVA has an Insider Trading Policy that provides guidelines with respect to transactions in TVA securities and the handling of confidential information about TVA and the companies with which TVA engages in transactions or does business. The policy promotes compliance with U.S. federal, state, and foreign securities laws that prohibit certain persons who are aware of material nonpublic information about TVA from (1) purchasing, selling, or otherwise engaging in transactions in TVA securities, or (2) providing material nonpublic information to other persons who may trade on the basis of that information. The prohibitions against insider trading apply to trading or otherwise transacting in TVA securities, tipping, and making recommendations to engage in transactions in TVA securities by virtually any person, including all persons associated with TVA, if the information involved is material and nonpublic. In addition, the prohibitions against insider trading extend to transactions in the securities of other companies if the transactions are based on material nonpublic information gained while working for TVA.

Committees of the TVA Board

The TVA Board has an Audit, Finance, Risk, and Cybersecurity Committee established in accordance with the TVA Act. This committee oversees TVA's financial health and reporting, risk management, cybersecurity, compliance, ethics, electricity rates, annual budget, major contracts, and portfolio planning. It also reviews and considers input from the TVA Inspector General to ensure TVA investigates and reports transparently about its financial and legal obligations. Members include Joe H. Ritch (Chair), Beth P. Geer, William B. Kilbride, and William J. Renick. Director Kilbride is an "audit committee financial expert" as defined in Item 407(d)(5) of Regulation S-K under the Securities Exchange Act of 1934 (the "Exchange Act").

TVA is exempted by Section 37 of the Exchange Act from complying with Section 10A(m)(3) of the Exchange Act, which requires each member of a listed issuer's audit committee to be an independent member of the board of directors of the issuer. The TVA Act contains certain provisions that are similar to the considerations for independence under Section 10A(m)(3) of the Exchange Act, including that to be eligible for appointment to the TVA Board, an individual shall not be an employee of TVA and shall make full disclosure to Congress of any investment or other financial interest that the individual holds in the energy industry.

Under Section 10A(m)(2) of the Exchange Act, which applies to TVA, the audit committee is directly responsible for the appointment, compensation, and oversight of the external auditor; however, the TVA Act assigns the responsibility for engaging the services of the external auditor to the TVA Board.

The TVA Board has also established three committees in addition to the Audit, Finance, Risk, and Cybersecurity Committee, as explained below:

The External Stakeholders and Regulation Committee oversees relationships with customers, members of the public, and key stakeholders. Involvement includes TVA's regulatory policy, natural resource management, economic development, government relations, federal advisory councils, and emerging social issues. Current members include Beth H. Harwell (Chair), Beth P. Greer, L. Michelle Moore, and William J. Renick.

The Operations and Nuclear Oversight Committee helps ensure the safety and effectiveness of TVA's power system generation and transmission assets by overseeing operational performance and planning. Additional oversight includes significant projects, major inspections and evaluations, long-term asset planning, and operational and regulatory compliance. Current members include Robert P. Klein (Chair), L. Michelle Moore, Brian E. Noland, and A. Wade White.

The People and Governance Committee has a primary focus on people and the creation of a culture that lives up to TVA's values and seeks to ensure optimal performance and sustainability of the enterprise. The committee reviews key components of the people framework such as inclusion with diversity, talent, engagement, total rewards, and labor relations. Another key function of this committee is Board governance. Current members include Brian E. Noland (Chair), Beth H. Harwell, Robert P. Klein, and A. Wade White.

164

Table of Contents

ITEM 11. EXECUTIVE COMPENSATION

Compensation Discussion and Analysis

This Compensation Discussion and Analysis ("CD&A") provides information on the objectives, goals, and structure of TVA's executive compensation program and the 2023 compensation awarded to TVA's CEO, CFSO, and the three other most highly compensated executive officers serving at the end of 2023. Collectively, these officers are TVA's 2023 Named Executive Officers ("NEOs"):


Name	Title	Employment Date	Position Date
Jeffrey J. Lyash	President and Chief Executive Officer	2019	2019
John M. Thomas, III	Executive Vice President and Chief Financial and Strategy Officer	2005	2010
Donald A. Moul	Executive Vice President and Chief Operating Officer	2021	2021
Timothy S. Rausch	Executive Vice President and Chief Nuclear Officer	2018	2020
David B. Fountain	Executive Vice President and General Counsel	2020	2021

Note

Mr. Thomas was named Executive Vice President and Chief Financial and Strategy Officer ("CFSO") in June 2021 and has held the Chief Financial Officer position since June 2010.

TVA's Unique Public Power Mission of Service

TVA is a corporate agency and instrumentality of the U.S. that was created in 1933 by federal legislation to provide integrated resource management of the Tennessee Valley while improving the lives of the people in the region. This congressional statute directs TVA with the mission of being a national leader in technological innovation, low-cost power, and environmental stewardship. Under federal law, TVA is aligned with other corporate entities as it is required to follow Securities and Exchange Commission reporting requirements, and compensation must be based on prevailing compensation for similar positions in investor-owned companies as well as governmental entities.


TVA PUBLIC POWER MISSION - TO SERVE THE PEOPLE OF THE TENNESSEE VALLEY TO MAKE LIFE BETTER			Today, TVA operates the nation's largest public power system and is one of the largest U.S. electric utilities in terms of generating capacity. TVA's public power mission sets it apart from its investor-owned peers. As an instrumentality of the federal government, TVA’s mission is to serve the people of the Tennessee Valley. Profits do not go to shareholders, but rather are reinvested back into the Tennessee Valley community and the energy infrastructure that powers it. In doing so, TVA uses no appropriated tax dollars. TVA is self-funded, with virtually all its operations funded through revenue and power system financings.

Complexity and Scale Comparable to Investor-Owned Utilities

TVA supplies reliable power over 16,000 miles of transmission lines to a population of approximately 10 million people over nearly 80,000 square miles in seven southeastern states, employs approximately 10,900 people, and helps recruit and retain billions of dollars in economic development projects annually. The complexity, scale, and scope of its utility operations rival those of the largest U.S. utility companies. Unlike most of its peers, TVA is also responsible for managing and caring for many of the natural resources, including public lands and waters, in the Tennessee Valley region.

165

Table of Contents


Energy Delivering reliable, low cost, clean energy

Transmission Grid Reliability - 99.999% Residential rates - lower than 75% of top 100 U.S. Utilities* Industrial rates - lower than more than 95% of top 100 U.S. Utilities* * based on June 2023 12-month rolling average from U.S. Energy Information Administration ("EIA")

Largest Public Power System In the United States		32,139 MW Summer Net Capability of TVA-Operated Generating Facilities
One of the Largest Transmission Systems In high voltage lines among United States utilities More than 16,000 miles of transmission lines and 69 interconnections with neighboring electric systems		4th Largest Electricity Generator In the United States, based on 2022 Total Electric Generation
		3rd Largest Nuclear Fleet In the United States, providing 42 percent of the power supplied by TVA in 2023

29 Power-Generating Dams Conventional hydroelectric plants providing 3,739 megawatts of net summer capability

3rd Largest Pumped-Storage Hydro Plant In the United States, capable of producing 1,700 megawatts of net summer capability on demand


Generating Assets –Three nuclear sites –Four coal-fired sites –29 conventional hydroelectric sites –One pumped-storage hydroelectric site –Nine combustion turbine gas sites –Eight combined cycle gas sites –Nine operating solar installations –One diesel generator site	Partnering with 153 Local Power Companies, Every Day TVA Serves
	Approximately 10 Million People	Nearly 800,000 Businesses Including 60 directly served customers - which includes seven federal agencies
	Across Seven Southeastern States

Managing Large, Complex Operations Safely Continued Strong Safety Performance



Carbon Reduction Leadership

54% reduction in mass carbon emissions and 50% reduction in TVA's carbon emission rate from generation from CY 2005 to CY 2022

166

Table of Contents


Environment Caring for the region's natural resources


Managing
49 Dams Hydroelectric and non-power			Approximately 100 Public Recreation Areas

The Tennessee River to provide year-round navigation, flood damage reduction, and affordable and reliable electricity

Caring for


Over 40,000 Miles of Rivers, Streams, and Tributaries			11,000 Miles of reservoir shoreline 293,000 Acres of reservoir land 650,000 Surface Acres of reservoir water
Approximately 800 Miles of Commercially Navigable Waterways


Economic Development Creating sustainable economic growth


Helping attract $9.2 Billion Projected Investments in Tennessee Valley expected to create/retain 58,411 jobs (12,276 jobs created and 46,135 jobs retained)			Approximately 10,900 Employees 15,600 Contractors

TVA Programs


Rural Development Rural Leadership Institute / Customized Training Technical Services Site evaluations and master planning, 3D renderings, video, photography, and virtual reality Workforce Analytics Company Research Support communities in fulfillment of information for company prospects			Telework Technology Grant Assistance for rural or economically distressed communities to enhance technology capabilities that support remote work opportunities Product Development Financial support for communities to make sites and buildings more marketable for companies to locate and grow Training and Development Training and development, facilitation services, leadership training, workforce training, and talent development

A Top Utility in Economic Development 18 Consecutive Years According to Site Selection Magazine

167

Table of Contents

Attracting and Retaining Experienced Talent Requires Competitive Pay

Attraction and retention of talent is paramount to TVA given its complex, specialized operations and high-performance expectations. This important component of TVA's strategy was incorporated in the TVA Act through the requirement of competitive compensation in the Consolidated Appropriations Act of 2005. To effectively fulfill its public power mission, TVA must provide market-based, competitive compensation levels to drive superior performance and execution of ambitious multi-year objectives aligned with TVA's public power mission.

TVA is one of the largest and most complex organizations in the energy services industry, with generating capacity and a local power company ("LPC") customer count that surpasses most of its peers. Unique to TVA, the company is also responsible for managing the Tennessee River system to provide flood control, navigation, hydroelectric generation, recreation, water quality and supply, and other benefits. Further, TVA plays the critical role of attracting and allocating a significant amount of capital back into the economic development of the Tennessee Valley. TVA's revenue, "normalized" as defined in Note 1 below, is only marginally above the median of its proxy peer group, which demonstrates TVA's success with regard to its public service mission, as one of its primary objectives is to maintain the lowest feasible rates. As noted in Delivering Value Through Superior Performance below, TVA's rates are below the rates of the vast majority of the top U.S. utilities. TVA successfully manages these responsibilities with an employee count below the median employee count of these peers, demonstrating a comparatively greater efficiency.


			TVA POSITIONING AGAINST PROXY PEERS*

			*TVA's positioning and summary statistics are based on the latest available data at the time the executive compensation review was presented to the People and Governance Committee, October 2022. Data from TVA's 24-company proxy peer group are sourced from S&P Capital IQ. For information on peer group, see Compensation Setting Process – TVA Competes with Peers for Talent below. Notes on TVA Data: (1)Revenue reflects 2021 revenue, normalized (1) for estimated partnership and pandemic credits provided to customers and (2) to reflect TVA's role as a wholesale power provider and its offering of significant services beyond a traditional wholesale utility. This updated methodology best reflects TVA's revenue in comparison to the revenue of its proxy peers. (2)Assets are as of June 30, 2022. (3)Employee count is as of September 30, 2021. (4)Generating capacity is as of March 31, 2022. (5)Customer count is as of March 31, 2022 and represents metered households of LPCs that deliver power to approximately 10 million people of the Tennessee Valley.

Given the nature and scale of its operations, TVA competes with large investor-owned utilities ("IOUs") to attract and retain talent. All of TVA's NEOs were formerly employed by IOUs. Additionally, 68 percent of TVA executives who were externally recruited over the last five years are former employees of IOUs. TVA's ability to compete with these organizations for talent has yielded success for TVA and its stakeholders, and TVA's competitive pay philosophy is one of the key drivers of success in this area.

Delivering Value Through Superior Performance

TVA's success is measured in terms of value delivered to the businesses, customers, and residents of the Tennessee Valley by providing low-cost energy, maintaining reliable, safe, and efficient infrastructure, investing in the community's economy, and managing and protecting its environmental assets. Executing on its strategic priorities, TVA continues to make a positive impact on all its stakeholders, as shown below. Under the leadership of TVA's NEOs, TVA's employees delivered another year of strong performance – and achieved or exceeded nearly all 2023 key performance objectives.

168

Table of Contents


			Safety-Focused Operations •Top decile performance for TVA's Recordable Injury Rate and Serious Injury Incident Rate based on the most recent data available
			Pay for Performance •Above target at-risk incentive payouts awarded to employees for meeting or exceeding nearly all company performance goals in 2023
			Inclusive Culture & Recognition •Issued 2022 Diversity, Equity, Inclusion and Accessibility Report
			•2022-2023 Ethisphere® Compliance Leader VerificationTM - recognizing TVA’s best-in-class ethics and compliance program and TVA as first federal agency to receive this designation
			•Supports nine Employee Resource Groups ("ERGs") - launched new ERG, Council for Native Americans, in 2023
			•2023 Forbes America's Best Employers by State - Ranked No. 8 in Tennessee
			•2023 VETS Indexes 5-Star Employer - recognizing organizations doing the most to recruit, hire, retain, develop, and support veterans and the military-connected community
			•2023 Fair360 - Top Companies for Utilities Award - Ranked No. 3; Top Regional Companies - Ranked No. 12
			•2023 National Organization on Disability – Leading Disability Employer
			•2023 Military Friendly® Supplier Diversity Program - Ranked No. 1; Top 10 designation four years in a row •2023 Military Friendly® Brand - Rank "Designated" •2023 Military Friendly® Military Spouse Friendly Employers - Ranked No. 7 •2023 Military Friendly® Employers - Ranked No. 4; veterans represent approximately 17% of TVA workforce
			Training and Education •Continued investing in employees through training and performance improvement programs
			Employee Benefits, Well-being, and Virtual Care •Expanded preventive mental health services and travel benefit •Implemented a Healthy Maternity Program •Enhanced therapy and counseling services
			Strong Labor Partnerships •Employees and contractors are represented by 17 different labor union groups
			•One of the largest U.S. contributors to the Helmets to Hardhats program

169

Table of Contents


			Reliable and Clean Energy •The TVA transmission grid has operated with 99.999 percent reliability since 2000
			•Exceeded stretch goal for availability of TVA's coal generation fleet, and exceeded target goals for availability of TVA's nuclear and combined cycle generation fleets
			•$19.7 billion invested in a cleaner and more diverse energy generation mix since 2013
			•Top quartile performance among regional industry peers in clean energy (Based on Edison Electric Institute's June 2023 Electric Company Carbon Emissions and Electricity Mix Reporting Database for Corporate Customers)
			•Achieved commercial operation of three new units at Colbert Combustion Turbine site
			•TVA Nuclear fleet demonstrated consistent, exemplary, top performance
			–Browns Ferry Unit 2 exceeded its continuous run record (562 days) and achieved its first breaker-to-breaker continuous run record - 665 consecutive days (February 2023)
			–Sequoyah maintained station performance in top quartile for the entire fiscal year (based on standard nuclear industry definitions for station performance)
			–Browns Ferry, Sequoyah, and Watts Bar nuclear sites had exemplary performance levels compared to industry peers
			–Watts Bar Unit 1 achieved its second breaker-to-breaker continuous run – 496 consecutive days (April 2023). This duration is second to the breaker-to-breaker continuous run record of 512 days (September 2000)
			Effective Resource Management •An estimated $9.7 billion in flood damage averted in the Tennessee Valley and along the Ohio and Mississippi Rivers over TVA's recorded history, with an estimated $7 million in flood damage averted in the Tennessee Valley in 2023
			•Operates River Forecast Center around the clock, monitoring weather conditions and forecasts, and constantly watching and adjusting the Tennessee River system
			•Manages the Tennessee River system in an integrated manner, which includes balancing hydroelectric generation, navigation, flood-damage reduction, water quality and supply, and recreation
			•Implementing the Hydro Life Extension Program with a focus on improving the availability and flexibility of the hydroelectric fleet

170

Table of Contents


			TVA Strength and Stability •Organization and operations entirely self-funded since 1999
			•Total Financing Obligations ("TFOs") at September 30, 2023 were among the lowest in over 30 years
			Rates •Residential rates lower than 75 percent of the top 100 U.S. utilities (based on June 2023 12-month rolling average from EIA) •Industrial rates lower than more than 95 percent of the top 100 U.S. utilities (based on June 2023 12-month rolling average from EIA)

			Strong Partnerships •COVID-19 Pandemic Support –Continued regulatory relief and flexibility to LPCs through June 30, 2023
			–In previous years, the TVA Board approved pandemic credits, which were effective for 2021, 2022, and 2023. These credits provided an annual 2.5 percent monthly base rate credit and applied to service provided to TVA's LPCs, their large commercial and industrial customers, and TVA's directly served customers and totaled $225 million and $228 million for 2023 and 2022, respectively
			–Continued support through the Community Care Fund established in 2020 that has already provided over $11 million, with over $2 million provided in 2023, to support local initiatives that address hardships created by the COVID-19 pandemic
			•Returned $199 million in bill credits to LPCs participating in Long-Term Partnership Agreements in 2023
			Economic Development •Named a Top Utility in Economic Development by Site Selection Magazine for 18th year in a row
			•Efforts continued to help attract and encourage the expansion of business and industries in the Tennessee Valley in 2023 contributing to: –$9.2 billion in projected investments, and –Expect creation/retention of 58,411 jobs (12,276 jobs created; 46,135 jobs retained)
			•Supported rural communities with TVA economic development programs tailored to meet the needs of these areas
			•Provided $611 million in tax equivalent payments in 2023 to state and local governments served by TVA’s energy generation or in areas supporting TVA properties (excluding impacts from tax equivalents related to fuel cost adjustments)
			Community Support •Nearly $11 million donated to organizations across the Tennessee Valley in addition to the Community Care Fund
			•Distributed 1 million meals to families in need in 2023 through TVA's partnership with Feeding America
			•Continued support through the Home Uplift, School Uplift, and Community Centered Growth programs across the Tennessee Valley
			•Through the Connected Communities initiative, TVA established 15 connected communities pilot projects aimed at addressing today's challenges with community-driven information and technology solutions for a modernized energy system. Six community partnerships have also been added to provide consulting services

171

Table of Contents


			Sustainability Solutions
			•Sustainability helps TVA to live its values – those of Safety, Integrity, Inclusion, and Service – and encompasses the following: –Economic Impact – partnering to build the region’s clean energy economy, –Environment – stewarding the region’s resources, –Social – serving people and communities across the region, and –Governance – driving progress through accountability and transparency
			•Issued 2022 Sustainability Report highlighting innovative work and partnerships •Issued 2022 EEI Environmental, Social, and Governance ("ESG")/Sustainability Report •TVA projects and community partnerships supported through biodiversity investments consistent with TVA Board’s Biodiversity Policy
			Energy •Carbon-free power supply mix was 55% percent of TVA's overall power supply for the year ended September 30, 2023
			•For CY 2022, TVA's mass emissions of carbon dioxide were at a 54 percent reduction and TVA's carbon emission rate was at a 50 percent reduction from 2005 levels

			–Chart depicts both generated and purchased power within respective resource types. In addition to power supply sources included here, TVA offers energy efficiency programs that effectively reduced 2023 energy needs by about 2,100 net cumulative gigawatt hours or 1.3%. TVA sells the renewable energy certificates ("RECs") resulting from some of its purchased power to certain customers
			•First utility in the nation to successfully obtain approval for an early site permit from the Nuclear Regulatory Commission to potentially construct and operate Small Modular Reactors ("SMRs") at TVA’s Clinch River Nuclear Site •In December 2022, TVA entered into a multi-party collaborative arrangement to further advance the global deployment of SMRs
			•New Nuclear Program approved by TVA Board in 2022 – up to $200 million to explore advanced reactor technology options – New Nuclear Program provides a systematic roadmap for TVA’s exploration of advanced nuclear technology
			•Top quartile utility in renewable energy delivered in the Southeast
			Programs and Partnerships •Pioneering partnerships to develop advanced nuclear technology •TVA offers renewable energy programs, in partnership with LPCs, which allow businesses and individuals to purchase RECs to meet their renewable energy and sustainability goals
			•TVA has been working with LPCs, state agencies, and third-party charging developers on the creation of the Fast Charge Network for electric vehicles, and in 2022, TVA launched the Fast Charge Network. As of September 30, 2023, 15 sites were complete and operational with 55 additional sites under contract for development
			•In 2023, TVA began construction on its first TVA-owned, grid scale, lithium-ion demonstration battery project near Vonore, Tennessee
			National Defense •Supports national defense efforts and partners with Oak Ridge National Laboratory on innovative research

172

Table of Contents



Strong Performance Furthers TVA's Public Power Mission TVA's workforce performed at a high level in 2023 in managing TVA's extensive, complex operations and delivering on its public power mission. As a result of its high level of performance, TVA achieved nearly all of its performance objectives at target or above for both its annual and long-term incentives for 2023. TVA is a utility company that competes with other utilities - including IOUs - for talent, but since TVA is a mission-based organization, TVA compensates its CEO conservatively relative to its compensation peers. TVA’s benchmarking and compensation-setting process is described below under Compensation Setting Process – TVA Competes with Peers for Talent. TVA generally determines target total direct compensation ("TDC") based on TVA’s relevant labor market. Currently, TVA’s CEO target TDC is below the 50th percentile (median) of 2023 compensation peers. TVA's performance along with its compensation structure results in differentiated value delivered directly to the residents of the Tennessee Valley and reflects a keen focus on TVA's mission of serving those residents.

173

Table of Contents

Notable 2023 Actions

The following are notable plan design changes for 2023:

Plan Changes to Better Align to Market (approved by TVA in 2022 and applicable to performance cycles ending in 2023 and beyond)

Short-Term Incentive ("STI") Plans

On May 10, 2022, the CEO approved plan design changes to TVA's STI plans, including the Executive Annual Incentive Plan ("EAIP"). The maximum scorecard opportunity increased to 200 percent to remain competitive through better alignment with market practices of TVA’s pay comparator peer group and to reward achievement of stretch performance goals. This change continues to reinforce corporate performance that contributes to TVA’s overall commitment to its stakeholders while maintaining the current plan design maximum payout based on a combination of scorecard results, a Corporate Multiplier, and an Individual Performance Multiplier. Approved changes now allow positive discretion on the Corporate Multiplier (increased to 1.1), which provides additional consideration for the quality of annual performance results as well as the flexibility to recognize corporate achievements not directly captured in the scorecard results, and complements the existing negative discretion currently provided under the EAIP. STI plans include the Winning Performance Team Incentive Plan ("WPTIP") for eligible non-executives and the EAIP for eligible executives, including the NEOs. Final awards for the CEO are approved by the Board Chair after obtaining input from Board members and consulting with the People and Governance Committee.

Long-Term Incentive Plan ("LTIP")

On May 10, 2022, the CEO approved changes to the LTIP. The maximum scorecard opportunity increased to 200 percent to remain competitive through better alignment with market practices of TVA’s pay comparator peer group and to reward achievement of stretch performance goals.

CEO participation in TVA incentive plans is approved and administered by the Board or its designee.

TVA's Executive Compensation Philosophy is Guided by the TVA Act

TVA's mission is to serve the people of the Tennessee Valley to make life better. TVA aims to achieve its mission by attracting, retaining, and motivating highly qualified and committed executives to guide the organization's strategy, performance, and public power mission. TVA follows a Compensation Plan as adopted by the TVA Board in accordance with the guidance of the TVA Act.

The Compensation Plan is designed to:



			•Provide market-based, competitive compensation levels so TVA can attract, retain, and motivate highly competent employees. TDC generally is determined by considering several factors, including reference to the median (50th percentile) of the relevant labor market. Executives may be positioned above or below the median based on labor market conditions and other factors such as tenure in the role. •Set performance goals that are aligned with TVA's strategic priorities. •Incentivize and reward short-term and long-term performance by providing a mix of salary and performance-based short-term and long-term incentives, typically targeting a majority portion of long-term compensation in the form of at-risk, performance-based compensation. •Align performance and productivity improvement at all levels by setting consistent performance goals and objectives for all levels of the organization.

174

Table of Contents

The TVA Board follows these requirements of the TVA Act in designing and implementing its Compensation Plan:

•Compensation will be based on an annual survey of benchmark compensation for similar positions in private industry, including engineering and electric energy companies, publicly-owned electric companies, and federal, state, and local governments; and

•Compensation will take into account education, experience, level of responsibility, geographic differences, and retention and recruitment needs.

TVA's Executive Compensation Program Aligns Pay with Performance

Two-thirds of the CEO's target TDC is performance-based and at risk, based on achievement of performance goals that further advance TVA's mission and strategic objectives. More than half of the other NEOs' target TDC opportunity is performance-based and at risk. This alignment of compensation with performance also results in compensation being aligned with value delivered to TVA's stakeholders, including LPCs, businesses, and communities, and to the economy of the Tennessee Valley.


CEO TARGET TDC COMPENSATION MIX			OTHER NEO TARGET TDC COMPENSATION MIX

175

Table of Contents

2023 CEO Target Total Direct Compensation Is Below the Peer Median

The TVA Act encourages competitive, market-based executive compensation. Many of TVA's peers, with similarly complex and large-scale operations, are IOUs. The TVA Board considers TVA's federal agency status in setting compensation components and pay levels, both directly – by incorporating government/non-profit agencies into the executive compensation survey sample used to develop benchmarks, as required by the TVA Act – and indirectly by approving target TDC that was below the 50th percentile (median) of the market composite data. The compensation consultant for the People and Governance Committee (the "Committee") performed a market study in January 2021, which evaluated multiple methodologies and validated TVA’s current methodology for benchmarking CEO compensation.

The TVA Board increased Mr. Lyash's pay for 2023 to reflect his leadership, performance, and experience. While the change moved Mr. Lyash's pay closer to the median in 2023, his target TDC continues to be below the median of the 2023 market composite.

The use of benchmarking data is described in detail under Compensation Setting Process – TVA Competes with Peers for Talent below.

The graphics below illustrate 2023 target TDC for the CEO and the average 2023 target TDC for the other NEOs as compared to the 2023 market composite 25th and 50th (median) percentiles.

Note

Target market assessment was effective October 2022 and included a market composite of Willis Towers Watson (“WTW”) survey sample and proxy peer group. See Compensation Setting Process — TVA Competes with Peers for Talent — List of Compensation Peer Companies below for a list of companies in the survey sample and proxy peers.

176

Table of Contents

CEO Compensation at a Glance

ACTUAL 2023 TOTAL DIRECT COMPENSATION ("TDC") EARNED - $7,985,860

$1,227,000
BASE SALARY

$1,302,384
ANNUAL PERFORMANCE AWARD

At risk, performance-based

Under the Executive Annual Incentive Plan ("EAIP"), performance achieved against target was 185 percent, followed by the application of a 0.85 Corporate Multiplier. An Individual Performance Multiplier was then applied at 45 percent.

$3,963,176
LONG-TERM PERFORMANCE ("LTP") AWARD(1)

At risk, performance-based

Under the Long-Term Incentive Plan ("LTIP"), the LTP payout percentage achieved for the three-year performance cycle ended September 30, 2023, was adjusted by TVA's Board from 146 percent to 136 percent.

$1,493,300
LONG-TERM RETENTION
("LTR") AWARD(2)

Under LTIP, award amount consists of three 2023 tranches – 2021 LTR award, 2022 LTR award, and 2023 LTR award.

Notes

(1)Mr. Lyash was granted an LTP award with a target amount of $2,914,100 effective October 1, 2020, for the 2021-2023 performance cycle.

(2)Mr. Lyash’s LTR incentives earned in 2023 reflect three overlapping retention awards (typically granted annually with ratable vesting over three years subject to continued employment).

TDC earned reflects incentive outcomes tied to short- and long-term company performance, along with decisions made by the Committee at the end of 2023, to reward the CEO's individual performance. Under Mr. Lyash’s leadership as CEO, TVA has made meaningful progress on improving its public power mission. The company’s performance under key operational metrics strengthened TVA’s ability to deliver low-cost and reliable energy to the Tennessee Valley.

2023 TARGET TDC OPPORTUNITY - MAJORITY IS AT-RISK/PERFORMANCE-BASED


									Target TDC opportunity is forward-looking – it represents potential compensation set by the Committee, effective at the beginning of 2023, to incentivize superior performance. Some of the $8,757,500 opportunity was earned in 2023 (salary, annual performance award, and 1/3 of the LTR award) while most will not be earned until future satisfaction of preset performance goals or employment conditions: Mr. Lyash will earn the LTP award component only upon achievement of certain performance targets at the end of the three-year performance period (September 30, 2025), and he will receive the second and third tranches of the LTR award opportunity only upon his continued employment on each of September 30, 2024 and September 30, 2025. See 2023 Performance Goals and Performance Achievement below for more information on annual and long-term incentive plans. The CEO’s annual performance award and LTP award total 66% of target TDC, and require achievement of financial, operational, and individual goals for the CEO to realize value. There is no minimum payment guaranteed under the annual and long-term performance awards.

177

Table of Contents

KEY COMPANY PERFORMANCE METRICS

The 2023 annual key performance metrics objectives were established in 2022 and, despite challenges presented by long-term U.S. skilled labor shortages, market conditions, and economic development and demand management, TVA exceeded nearly all targeted objectives, delivering strong operational, overall safety, and financial strength performance for 2023. The LTP performance metrics below were for the 2021-2023 performance cycle. Organizational performance under the 2021-2023 LTP program was strong in achieving several key operational measures, as noted below.


Annual Metric(1)	Target Performance		Actual Performance		Weight	Performance Against Target
TVA Total Spend ($M)	$6,560		$6,168		40%	Exceeded stretch goal
Load Not Served (System Minutes)	3.9		3.1		30%	Exceeded stretch goal
Annualized Nuclear Online Reliability Loss Factor	2.00	%	1.53	%	15%	Exceeded target goal
Combined Cycle Equivalent Availability Factor	83.6	%	83.9	%	10%	Exceeded target goal
Coal Equivalent Availability Factor	63.8	%	74.8	%	5%	Exceeded stretch goal


LTP Metric(1)	Target Performance	Actual Performance	Weight	Performance Against Target
Non-Fuel Delivered Cost of Power	3.48	3.40	45%	Exceeded target goal
Load Not Served (System Minutes)	3.9	3.6	30%	Exceeded target goal
External Performance Indicators for TVA Nuclear Fleet	94.9	94.1	15%	Above threshold goal
Stakeholder Survey	77.7	81.0	5%	Exceeded stretch goal
Customer Survey	71.3	70.3	5%	Above threshold goal

Note

(1)See 2023 Performance Goals and Performance Achievement below for further information on each performance metric and 2023 results.

Compensation Setting Process

Establishing Compensation and Governance Practices

The TVA Board, under the authority of the TVA Act, has responsibility for establishing compensation for TVA employees, including the NEOs. The TVA Board is directed under Section 2 of the TVA Act to establish a plan that specifies all compensation (such as salary and any other pay, benefits, incentives, or other form of remuneration) for the CEO and TVA employees. The TVA Act also provides that the TVA Board will annually approve all compensation (such as salary and any other pay, benefits, incentives, or other forms of remuneration) for all managers and technical personnel who report directly to the CEO (including any adjustments to compensation).

Under the authority of the TVA Act, the TVA Board, its Committee, and individual TVA Board members are involved in compensation matters. The TVA Board has taken the following actions to delegate authority with respect to compensation:

Delegation to Committee

•Responsibility for oversight of executive compensation pursuant to the Compensation Plan and review of this CD&A.

•Authority to review and make critical recommendations to the Board, as reflected in the chart on the following page.

Delegation to TVA Board Chair

•Authority to evaluate and rate the CEO’s performance during the year.

•Authority to approve any payout to the CEO under the EAIP, based on, among other things, the CEO’s evaluated performance during the year, in consultation with the Committee and with input from individual members of the TVA Board.

Delegation to CEO

•Authority to set or adjust total target compensation for present or future direct reports within a compensation range of 80 percent to 110 percent of the target TDC. Additionally, has authority to approve the parameters of supplemental compensation and benefit plans, provided that the CEO may not finally take such actions until the TVA Board members have been notified of the proposed actions and given the opportunity to ask the Committee, or the full TVA Board, to review the proposed actions before they become effective.

178

Table of Contents

•Authority to approve the individual performance goals for the CEO's direct reports and the authority to evaluate and rate the performance of the CEO's direct reports during the year against such performance goals, in consultation with the Committee and with input from individual members of the TVA Board.

•Authority to approve, or delegate to others the authority to approve, the salaries and all other compensation of employees whose annual salaries would be in excess of Level IV of the Executive Schedule of the U.S. Government ($183,500 in 2023) for anyone except the CEO and the Inspector General.

•Authority to approve, or delegate to others the authority to approve, all personnel and compensation actions that the TVA Board has not reserved for itself.

Role of Compensation Consultant

The Committee engaged the independent consulting firm Frederic W. Cook & Co., Inc. ("FW Cook") in 2023 to determine the peer group and the benchmarking process and to help evaluate competitive compensation. The Committee assessed certain independence factors and determined the firm's work raised no potential conflict of interest.

179

Table of Contents

Compensation Setting – Annual Roles and Responsibilities

The following chart sets forth the roles of the TVA Board, Board Chair, Committee, and CEO, and typical timeframe, in setting compensation for the NEOs.


What	When	How
Compensation Governance	January	•Committee reviews and evaluates independent compensation consultant.
	April - May	•CEO reviews and approves any changes to supplemental compensation plans (i.e., short-term incentive ("STI") and long-term incentive ("LTI") plans). •Committee reviews TVA Compensation Plan, peer group, and benchmarking process and recommends any changes to the TVA Board. •TVA Board reviews and approves any changes to compensation governance.
Incentive Plan Measures and Goals	January - October	•Committee monitors performance quarterly.
	April	•Committee reviews proposed performance measures for next fiscal year ("FY").
	July - August	•Committee reviews and recommends to the TVA Board the STI corporate multiplier measures and goals and LTIP measures and goals for upcoming cycles. •CEO sets and approves STI enterprise performance measures and goals for upcoming cycle. •TVA Board approves STI corporate multiplier measures and goals and LTIP performance measures and goals for upcoming cycles.
Corporate Multiplier ("WPTIP"/"EAIP")	October - November	•CEO qualitatively assesses performance compared to target and recommends final payout and corporate multiplier between 0 and 1.1 for the past FY to the Committee and TVA Board. •Committee reviews and recommends to the TVA Board the corporate multiplier for past FY. •TVA Board qualitatively assesses performance compared to target to determine final corporate multiplier between 0 and 1.1 for past FY.
Long-Term Incentive Plan –Long-Term Performance ("LTP")	October - November	•CEO qualitatively assesses performance compared to target and recommends final LTIP payout percentage for cycle ending in past FY to the Committee and TVA Board. •Committee reviews and recommends to TVA Board the LTIP payout percentage for cycle ending in past FY. •TVA Board qualitatively assesses performance compared to target to determine final LTIP payout percentage for cycle ending in past FY. •The TVA Board has the discretionary authority to review the results of performance measures and goals and to approve any adjustments to payouts in appropriate circumstances.
Executive Schedule ("ES") Level IV	October - November	•The Board has delegated to the CEO the authority to approve, or delegate to others the authority to approve, the salaries and all other compensation of employees whose annual salaries would be in excess of ES Level IV ($183,500 for 2023) for anyone except the CEO and the Inspector General.
CEO Performance Evaluation	September - November	•Individual TVA Board members complete CEO performance assessment and return to TVA's Compensation organization. •TVA's Compensation organization summarizes comments and information and presents to the Board Chair. •Board Chair consults with Committee. •Board Chair informs EVP, Chief Human Resources and Administrative Officer, he/she has: –Evaluated the CEO's performance, and –Determined the EAIP award. •Board Chair and Committee Chair jointly inform CEO of his/her performance evaluation.
CEO Compensation Adjustment	October - November	•Committee reviews the compensation consultant's benchmarking and market analysis report. •Committee decides whether to recommend compensation adjustments for the CEO (recommends to the full TVA Board). •TVA Board reviews and approves at the November TVA Board meeting, if applicable, for the next FY.
CEO Executive Annual Incentive Plan ("EAIP") Award	October - November	•Board Chair obtains input from TVA Board members, consults with Committee, and approves any payout, or adjustments to payout, to the CEO under the EAIP. •Board Chair informs EVP, Chief Human Resources and Administrative Officer, via memo.
CEO Annual Performance Goals	October - November	•Board Chair reviews and discusses with CEO performance goals for the next FY. •Board Chair consults with appropriate TVA Board committee. •Board Chair solicits input from individual TVA Board members. •Board Chair informs CEO of approved goals.
CEO Direct Report Compensation	October - November	•CEO determines compensation adjustments for CEO direct reports. The TVA Board has delegated this responsibility to the CEO for the CEO direct reports within an approved range (80-110 percent of targeted TDC). •CEO reviews CEO direct reports' performance with Committee and informs TVA Board members of compensation adjustments under consideration prior to approving the compensation adjustments. •CEO notifies EVP, Chief Human Resources and Administrative Officer, of approved compensation adjustments via memo.
Compensation Discussion and Analysis ("CD&A")	October - November	•Committee reviews and recommends inclusion in TVA's Annual Report on Form 10-K.

180

Table of Contents

TVA Competes with Peers for Talent

A fundamental goal of TVA's executive compensation program is to attract, retain, and motivate the highly competent talent necessary to manage TVA's complex operations and achieve superior performance. TVA competes for this talent with large IOUs, and thus TVA needs to offer compensation programs that are competitive with those peers.

Use of Market Data and Benchmarking

TVA generally determines target TDC for executives based on the relevant labor market. After compiling market compensation for the positions at the beginning of 2023, the Committee, with assistance from FW Cook, used the information to:

•Assess target compensation level and incentive opportunity competitiveness; and

•Determine appropriate target compensation levels and incentive opportunities to maintain the desired degree of market competitiveness, while also considering other factors, such as executive experience, skill set, performance, and internal parity.

The relevant labor market for most of TVA's executives, including the NEOs, consists of both private and publicly-owned companies in the energy services industry that have similar revenue and scope as TVA. Each year, the Committee's compensation consultant recommends a peer group for approval by the Committee. For 2023 compensation opportunities, TVA's market data was determined based on a review of executive compensation survey data and proxy peer group data from public filings. For the survey-based analysis, TVA referenced a sample from the 2022 Willis Towers Watson Energy Services Executive Compensation Database consisting of (i) 32 IOUs with revenue greater than or equal to $3.0 billion plus (ii) 11 additional government/non-profit entities with revenue greater or equal to $1.0 billion. Data from this sample were further regressed to TVA's size based on revenue. For NEO roles, the survey analysis was supplemented with public compensation data from a separate proxy peer group of IOUs. The Committee reviews the proxy peers annually to ensure continued appropriateness, including comparable business content and model, company size measured primarily by revenue and assets, and other refining factors such as generating capacity, number of employees, and number of customers. When making compensation decisions for 2023, the Committee reviewed proxy peer group size data, which is shown below. At that time, TVA was centrally positioned within the current proxy peer group; the primary financial metrics, revenue and assets, were positioned close to median while secondary metrics were balanced, with generating capacity above the 75th percentile, employee count between the 25th percentile and median, and customer count near the 75th percentile.

TVA REVENUE VS
PEERS(1)

(in millions)

TVA ASSETS VS
PEERS(2)

(in millions)

GENERATION CAPACITY VS
PEERS(3)

(in thousand MW)

TVA EMPLOYEE
COUNT VS PEERS(4)

LPC CUSTOMER COUNT VS PEERS(5)

(in thousands)

TVA's positioning and summary statistics are based on the latest available data at the time the executive compensation review was presented to the People and Governance Committee, October 2022. Data from TVA's 24-company proxy peer group are sourced from S&P Capital IQ. For information on peer group, see List of Compensation Peer Companies below.

Notes on TVA Data:

(1)Revenue reflects 2021 revenue, normalized (1) for estimated partnership and pandemic credits provided to customers and (2) to reflect TVA's role as a wholesale power provider and its offering of significant services beyond a traditional wholesale utility. This updated methodology best reflects TVA's revenue in comparison to the revenue of its proxy peers.

(2)Assets are as of June 30, 2022.

(3)Generating capacity is as of March 31, 2022.

(4)Employee count is as of September 30, 2021.

(5)Customer count is as of March 31, 2022 and represents metered households of LPCs that deliver power to approximately 10 million people of the Tennessee Valley.

For executives with both proxy and survey benchmarks, competitive comparisons were made relative to a "market composite", or an average of the survey and proxy data.

181

Table of Contents

List of Compensation Peer Companies

The following chart outlines the companies that constituted the survey sample and proxy peer group used to benchmark NEO compensation for 2023:

Company

Investor Owned Utilities
with Revenue Greater
Than or Equal to $3.0 Billion
Which Participated in
2022 Willis Towers
Watson Energy Services
Survey

Government/Non-Profit Entities with Revenue Greater Than or Equal to $1.0 Billion
Which Participated in
2022 Willis Towers
Watson Energy Services
Survey

Proxy Peer Group
of Investor Owned
Utilities

AES Corporation

Alliant Energy Corporation

Ameren Corporation

American Electric Power Company, Inc.

CenterPoint Energy, Inc.

CMS Energy Corporation

Consolidated Edison, Inc.

Constellation Energy Corporation

CPS Energy

Dominion Energy, Inc.

DTE Energy Company

Duke Energy Corporation

Edison International

Entergy Corporation

Evergy, Inc.

Eversource Energy

Exelon Corporation

FirstEnergy Corp.

Great River Energy

JEA

LG&E and KU Energy LLC

Lower Colorado River Authority

Nebraska Public Power District

New York Power Authority

NextEra Energy, Inc.

NiSource, Inc.

NRG Energy, Inc.

Oak Ridge National Laboratory

Oncor Electric Delivery Company LLC

Omaha Public Power

Pacific Gas and Electric Company

Pinnacle West Capital Corporation

PPL Corporation

Public Service Enterprise Group Inc.

Puget Sound Energy, Inc.

Salt River Project

Santee Cooper

Sempra Energy

Southern Company

Tri-State Generation and Transmission

Vistra Corp.

WEC Energy Group, Inc.

Xcel Energy, Inc.

182

Table of Contents

Assessment of Risk

TVA's Enterprise Risk Management organization, in coordination with other members of TVA's management, including Total Rewards, Digital Solutions and Data, conducts an annual assessment of enterprise-level risks including risks arising from TVA's compensation policies and practices.

Based on the results of this assessment, no risks were identified with the compensation policies and practices that are reasonably likely to have a material adverse effect on the organization and its achievement of its strategic goals and objectives.

2023 Executive Compensation Program Components

Total Direct Compensation ("TDC")

In setting executive compensation each year, the Committee focuses on TDC, which includes those compensation elements that incentivize future performance or reward past performance. TDC is comprised of annual salary, annual incentive award under the EAIP, LTP award under the LTIP, and LTR award under the LTIP.

Each year, two key compensation decisions are made with respect to NEO compensation: (1) the amount of the TDC opportunity to grant, which is forward-looking, incentivizes the NEO to perform, and is determined toward the beginning of the fiscal year, and (2) the amount of TDC earned, which rewards the NEO for prior performance and (other than salary or LTR award) is determined at the end of the year. The TDC components and weightings for TDC opportunities granted to the NEOs in 2023 are summarized below and described in the sections that follow. Since TVA is a governmental entity that issues no equity, all direct compensation is denominated and paid out in cash.

183

Table of Contents


Compensation Component And % of Target TDC	Objective	Key Features
Annual Salary	Provides fixed base level of compensation to executives to encourage hiring and retention of qualified individuals	•Annual salary is typically determined by considering, among other things, the median (50th percentile) for similar positions at other companies in TVA's peer group; above the median (50th to 75th percentile) for positions affected by market scarcity, recruitment and retention issues, and other business reasons; or below median due to incumbent experience, position scope, or other business reasons. •Typically reviewed annually to consider changes in benchmark salaries and/or exceptional individual merit performances.
Executive Annual Incentive Plan (EAIP)	Incentivizes performance by providing at-risk compensation tied to attainment of pre-established performance goals for the fiscal year	•Annual incentive payouts are based on the results of enterprise goals as determined from year to year by the TVA Board or the CEO, as applicable. Annual incentive payouts may be impacted by a corporate multiplier or adjusted by the TVA Board or CEO, as applicable, based on the evaluation of performance during the year. •Target annual incentive opportunities increase with position and responsibility and are based in part on the opportunities other companies in TVA's peer group provide to those in similar positions. •Typically reviewed annually to consider changes in benchmark annual incentives.
Long-Term Incentive Plan (LTIP)		•Participation is limited to key positions that have the ability to significantly impact the long-term financial and/or operational objectives critical to TVA's overall success. •LTP awards are granted with a three-year performance cycle. Awards are variable at-risk opportunities based on achievement against performance goals established at the beginning of the three-year performance period. •The Committee's policy is for a majority of each executive's total long-term incentive opportunity to be in the form of performance-based awards, with the remaining percent to be retention oriented. •LTR awards will vest and pay out in three equal increments annually over three years, subject to the participant being employed through such dates, but are payable upon death, disability, or retirement if earlier on a pro-rated basis. •Since TVA issues no equity, TVA offers retention awards to be competitive with the industry marketplace for talent, providing a retention incentive similar to restricted stock or restricted stock units. These grants are intended to encourage executives to remain with TVA and to provide, in combination with salary, EAIP, and LTP grants, a competitive level of TDC.
Long-Term Performance Award (LTP)	Incentivizes performance by providing at-risk compensation tied to attainment of pre-established performance goals over a three-year performance period
Long-Term Retention Award (LTR)	Incentivizes retention by providing retention-based grants that are tied to a three-year vesting schedule

Setting Competitive Compensation Amounts and Opportunities Relevant to Labor Market

Salary

Annual salary is considered a "fixed" compensation component. Salary levels are typically reviewed annually to consider changes in benchmark salaries and/or exceptional individual merit performances.

The 2023 salaries for the NEOs are described under each executive's compensation scorecard under 2023 Pay Decisions - 2023 NEO Pay Decisions and Compensation Scorecards below and reported in the Executive Compensation Tables and Narrative Disclosures - Summary Compensation Table.

Incentive Opportunities

The annual and long-term incentive opportunities for the NEOs are set at levels that (i) are competitive with the relevant labor market, with target TDC generally determined by considering the 50th percentile of the relevant labor market, and (ii) result in a majority of each executive's total long-term incentive opportunity in the form of performance-based awards and the remaining percent of each executive's total long-term incentive opportunity in the form of retention awards. More than half of TVA's NEO's target TDC opportunity is performance-based and at-risk as described above in TVA's Executive Compensation Program Aligns Pay with Performance.

184

Table of Contents

Long-term incentive awards are intended to provide a similar pay component as equity-based compensation at peer IOUs. Since TVA does not issue equity, the compensation program cannot provide a component similar to equity awards that capture long-term value, and have the potential for significant gains or losses, based on market fluctuations. As a result, TVA's long-term incentives are not necessarily intended to match market pay levels.

Target incentive opportunities increase with position scope and responsibility to hold management accountable for delivery of results and are based in part on the opportunities other companies in TVA's peer group provide to those in similar positions. Incentive opportunities are typically reviewed annually to consider changes in benchmark annual and long-term incentives. The Committee reviews peer benchmark information by position for each component of pay as well as for overall TDC.

Non-Direct Compensation Elements

Other Compensation

To recruit high-quality talent, TVA may offer recruitment awards as well as relocation assistance and reimbursement. These types of deferred cash incentive awards are intended to compensate the individuals for amounts they may have forfeited from their previous employer in order to join TVA and/or provide substitute compensation when the individual is not eligible to receive certain incentive payments until a future date.

In July 2023, Mr. Moul received the third and final installment of a deferred cash recruitment and relocation incentive in the amount of $100,000 that was part of his 2021 employment offer. In 2023, Mr. Moul received an additional $110,182 in relocation benefits as reported in the Executive Compensation Tables and Narrative Disclosures – Summary Compensation Table under "All Other Compensation".

Executive Severance Plan

TVA has established an Executive Severance Plan to provide additional benefits to certain executives if TVA terminates the employment of covered executives other than for Gross Misconduct or such executives terminate for Good Reason. See Executive Compensation Tables and Narrative Disclosures - Executive Severance Plan below for additional information regarding the benefits available to covered executives under the Executive Severance Plan as well as definitions of Gross Misconduct and Good Reason.

Retirement Benefits

TVA provides its NEOs with retirement benefits through its qualified plans as well as through a non-qualified supplemental executive retirement plan ("SERP") in order to provide compensation beginning with retirement or termination of employment (if vesting requirements are satisfied), with enhanced compensation for certain executives to provide an additional incentive for hiring and retention of qualified individuals.

TVA sponsors a qualified defined benefit plan ("pension plan") and a qualified defined contribution plan ("401(k) plan"), which are administered by the TVA Retirement System ("TVARS"). The availability of, and level of benefits provided by, these qualified plans are comparable to similar qualified plans provided by companies in TVA's peer group.

In addition to its qualified retirement plans, TVA has a SERP for selected executives who are critical to the ongoing success of the enterprise. TVA's SERP is a non-qualified plan that provides supplemental retirement benefits at compensation levels that are higher than the limits specified by Internal Revenue Service ("IRS") regulations for qualified retirement plans. The provision of such non-qualified plans to executives is a common practice among companies in TVA's peer group. The purpose of the SERP is to:

•Provide a competitive retirement benefit level that cannot be delivered solely through TVA's qualified retirement plans due to IRS limitations, and

•Provide a benefit level (as a percentage replacement of pre-retirement pay) that is more comparable to that of employees who are not subject to the IRS limitations.

More information regarding these retirement benefits is found following the Pension Benefits Table.

Health and Other Benefits

TVA offers a group of health and other benefits (medical, dental, vision, life and accidental death and disability insurance, and long-term disability insurance) that are available to a broad group of employees. The NEOs are eligible to participate in TVA's health benefit plans and other non-retirement benefit plans on the same terms and at the same contribution rates as other TVA employees.

185

Table of Contents

2023 Performance Goals and Performance Achievement

Strategic Priorities

Incentive Compensation Metrics*

A significant portion of each NEO's compensation is based on company performance and influenced by individual performance achievements. As a result, a majority of NEO compensation is at-risk, providing incentive for the executive to achieve superior performance for TVA and for the businesses, communities, and residents it serves, both in the short term and in the years to come.

Incentive compensation is provided to NEOs under the EAIP and LTIP. Each incentive award is described below.

People
Advantage

Amplifying the energy, passion, and creativity within each TVA employee

Safety - Serious Injury Incident Rate ("SIIR")

Operational

Excellence

Building on TVA's best-in-class reputation for reliable service and competitively priced power

Load Not Served

Annualized Nuclear Online Reliability Loss Factor

Combined Cycle Equivalent Availability Factor

Coal Equivalent Availability Factor

External Performance Indicators for

the TVA Nuclear Fleet

Financial

Strength

Investing in the future, while keeping energy costs as low as possible

Total Financing Obligations

Operating Cash Flow

Net Income

Total Spend

Non-Fuel Delivered Cost of Power

Powerful

Partnerships

Promoting progress through the shared success of TVA's customers and stakeholders

Jobs Created and Retained

Stakeholder Survey

Customer Survey

Igniting Innovation

Pursuing innovative solutions for TVA and its customers and communities

*Incentive compensation metrics are further described below in 2023 Incentive Plan Performance Metrics and Long-Term Performance Awards.

Executive Annual Incentive Plan

All TVA employees participate in an annual incentive program (subject to eligibility requirements), since every employee contributes to the success of TVA and the execution of its public power mission. While the metrics used for annual incentives are the same for all employees, they are provided under two plans: the WPTIP provides for annual incentive awards for eligible non-executives, and the EAIP provides for annual incentive awards for eligible executives, including the NEOs.

The EAIP is designed to encourage and reward executives for successfully achieving annual financial and operational goals. For 2023, each NEO's annual incentive payment was calculated as follows:

EAIP
Amount

Annual
Salary

Annual Target
Incentive
Opportunity

Percent of
Scorecard
Opportunity
Achieved
(0% to 200%)

Corporate
Multiplier
(0 to 1.1)

Individual
Performance
Multiplier
(0% to 150%)

Each component of this calculation is discussed below (except for annual salary, which is discussed above). The award for certain participants in the WPTIP and the EAIP may be adjusted by the participant's supervisor based on an evaluation of the participant's individual achievements and performance during the year. In addition, pursuant to discretion granted under the TVA Compensation Plan, awards may be further adjusted by the TVA Board or the CEO (1) as a result of any unusual or nonrecurring event affecting TVA or the financial statements of TVA, or (2) as a result of changes in business conditions or the business strategy of TVA. There is no guaranteed minimum payout under the EAIP or WPTIP, and the maximum payout for either plan cannot exceed 225 percent of the target award.

186

Table of Contents

Annual Target Incentive Opportunity

Following a review of benchmarking and individual performance, the TVA Board evaluated the appropriateness of the EAIP award opportunity for the CEO based on market data and other individual factors and made no changes for 2023. Similarly, the CEO evaluated the appropriateness of the EAIP award opportunities for the other NEOs based on market data and other individual factors, including internal parity, and made no changes for 2023. Accordingly, target EAIP award opportunities of the NEOs for 2023 were as follows:


Named Executive Officers	2023 Target Annual Incentive Opportunity(1)
Mr. Lyash	150	%
Mr. Thomas	80	%
Mr. Moul	80	%
Mr. Rausch	70	%
Mr. Fountain	70	%

Note

(1)Represents a percent of each NEO's annual salary.

187

Table of Contents

2023 Incentive Plan Performance Metrics

The metrics used to measure performance under the WPTIP and EAIP are the same for all TVA employees. These metrics tie directly to key enterprise metrics used by senior management in its annual budget and strategic planning process, which in turn tie directly to the achievement of TVA's strategic objectives and mission. The 2023 WPTIP and EAIP metrics and goals were set out in an organizational scorecard ("TVA Enterprise Scorecard") applicable to all employees. The 2023 performance measures, along with the weighting ascribed to each, are shown below as a percentage of the total WPTIP/EAIP award opportunity at target-level performance.

2023 WPTIP/EAIP METRICS

The 2023 WPTIP/EAIP metrics are described in detail below.

TVA Total Spend

What this measures: TVA's ability to keep costs low

Total Non-Fuel Operating and Maintenance, Capital, Non-Fuel Inventory, and Cloud Implementation expenses for corporate and operational Strategic Business Unit organizations (excludes Board of Directors).

Why Is This Metric Used?

Supports the overall TVA goal of maintaining costs and managing rates based on spending levels approved by TVA management and the TVA Board.

Load Not Served

What this measures: Transmission system outages that affect TVA customers

Load Not Served ("LNS") is a measure of the magnitude and duration of transmission system outages that affect TVA customers expressed in system minutes. An automatic customer interruption with a duration of one minute or greater is tracked as an LNS event. LNS events caused by TVA on a distributor system will also count as a TVA event even if the TVA system remains energized. LNS events exclude interruptions due to declared major events, variances, gunfire, vandalism, and verified tornadoes.

Why Is This Metric Used?

TVA manages this critical indicator to reduce the impact of customer outages.

Annualized Nuclear Online Reliability Loss Factor

What this measures: Nuclear plant availability

Annualized Nuclear Online Reliability Loss Factor is the 12-month ratio of all generation losses (minus refueling outage (“RFO”) and exempt losses) to reference energy generation (minus RFO and exempt losses) in a normal fuel cycle period, per external standard nuclear industry guidelines.

Why Is This Metric Used?

Monitors performance between refueling outages to obtain high unit and energy production reliability.

Combined Cycle Equivalent Availability Factor

What this measures: Combined cycle plant reliability

Combined Cycle Equivalent Availability Factor ("EAF") reflects the percentage of time over a given period that a generating unit was available to generate electricity for TVA-operated combined cycle generating assets, based on Generating Availability Data System ("GADS") event reporting guidelines for megawatt hour losses. Combined Cycle EAF excludes events classified as outside management control and variances.

Why Is This Metric Used?

Combined Cycle EAF focuses on ensuring TVA combined cycle generating assets are available and reliable to meet system demand.

Coal Equivalent Availability Factor

What this measures: Coal plant reliability

Coal EAF reflects the percentage of time over a given period that a generating unit was available to generate electricity for TVA coal generating assets, based on GADS event reporting guidelines for megawatt hour losses. Coal EAF excludes events classified as outside management control and variances.

Why Is This Metric Used?

Coal EAF focuses on ensuring TVA coal generating assets are available and reliable to meet system demand.

In setting the goal for each metric, consideration is given to TVA's historic performance, its strategic business plan priorities and strategic benchmarking goals, customer and stakeholder feedback, environmental and regulatory concerns and goals, and the competitive environment. Achievement of the target goal would result in a 100 percent payout with respect to that goal. A threshold goal is also set for each metric, so that no payout would occur with respect to metrics that fail to achieve that threshold. Additionally, a stretch goal for each metric is set to incentivize and reward exceptional performance. Linear interpolation is used for results between threshold and stretch goals.

188

Table of Contents

2023 Executive Annual Incentive Plan Results

The performance results on the 2023 TVA Enterprise Scorecard are set forth below. Performance reflects a 185 percent opportunity achieved against target (on a scale from 0 percent - 200 percent), followed by the application of the EAIP Corporate Multiplier, 0.85.

TVA'S 2023 ENTERPRISE SCORECARD PERFORMANCE(1)

Note

(1) The TVA Enterprise Scorecard sets forth the performance goals applicable to the WPTIP and the EAIP.

Corporate Multiplier Allows TVA Board to Adjust for Overall Performance

As in previous years, the TVA Board approved the use of a corporate multiplier for the 2023 EAIP. The corporate multiplier ranges between 0 and 1.1. The multiplier was based on performance in 2023 against goals set in May 2022 for six organizational metrics, and following are key highlights for this performance period:

•Continued overall strong safety performance, while also acknowledging an employee fatality

– 2023 SIIR remains top decile, based on most recent data available

•Financial health and performance – continued strong financial performance with TFO exceeding stretch; Net income exceeding target; and Operating Cash Flow exceeding threshold and below target

•Jobs created and jobs retained – 2023 efforts continued to help attract and encourage the expansion of business and industries

–$9.2 billion in projected investments, and

–Expected creation/retention of 58,411 jobs (12,276 jobs created and 46,135 jobs retained)

•Overall performance – strong performance with record–setting results across a broad range of metrics while also acknowledging the events of Winter Storm Elliott and an employee fatality

Why does the TVA Board
use a multiplier?

The multiplier allows the TVA Board to qualitatively assess the organization's performance, emphasizing the importance of safety, financial health, reputation, and economic development.

The TVA Board and the CEO qualitatively assessed TVA’s performance at the end of the 2023 performance period. Based on TVA's performance with respect to the 2023 corporate multiplier measures and the overall performance described above, and considering the additional accountabilities of the leadership team in regards to the events of Winter Storm Elliott and an employee fatality, the TVA Board determined to apply a 0.85 multiplier to the calculated EAIP payout.

189

Table of Contents

Corporate Multiplier Factors


Metric		Definition	Why Is This Metric Used?
Safety – Serious Injury Incident Rate ("SIIR")		A mathematical calculation used by Edison Electric Institute that quantifies the extent of injury for serious injuries and fatalities from events within the control of the employee and/or the employer.	TVA shares a professional and personal commitment to protect the safety of its employees, its contractors, its customers, and those in communities that TVA serves.
	Total Financing Obligations ("TFO")	TFO is calculated by subtracting unbudgeted contributions to unfunded liabilities from the sum of (1) long-term debt (including unamortized premiums/discounts), (2) short-term debt, (3) leaseback obligations, (4) energy prepayment obligations, and (5) variable interest entities.	TVA's TFOs are driven by its business plan and reflect the application of sound financial guiding principles. Focusing on this measure will improve TVA's fiscal performance and strengthen TVA's balance sheet.
	Operating Cash Flow	Amount of cash generated from power production and other mission-related activities and generally defined as operating revenues received less cash payments made for operating expenses. See Part II, Item 8, Financial Statements and Supplementary Data – Consolidated Statements of Cash Flows for additional information.	Operating Cash Flow is considered a key indicator of overall financial health as it measures TVA's ability to use cash received from customers to sufficiently fund outgoing cash expenditures.
	Net Income	Consists of the entity’s net earnings derived by adjusting revenues for the cost of doing business, including the cost of sales, depreciation, interest, taxes, and other expenses. See Part II, Item 8, Financial Statements and Supplementary Data – Consolidated Statements of Operations for additional information.	Net income is a standard accounting measure that provides a view of TVA's financial performance and position.
Jobs Created and Jobs Retained(1)		Measures the number of new or retained jobs in the Tennessee Valley for which TVA has played a role in the recruitment or retention of the economic development project.	Jobs Created and Retained is an industry standard measure that economic developers can speak to and easily understand, and provides an established tracking mechanism to measure TVA's economic development efforts.
Board Level Significant Events		Includes items deemed significant by the TVA Board of Directors. These items may affect TVA's reputation with its customers and its stakeholders, the organizational health of the workforce, or its impact on the public at large. Both favorable and unfavorable events will be considered.	An incentive pay program, by design, cannot cover the entire scope of activities that could occur during a given cycle. This measure allows the TVA Board to deem certain reputational, environmental, or other items as significant impacts to TVA's business. Items that may be considered significant (either favorably or unfavorably) include customer survey results, stakeholder survey results, key indicators of organizational health, environmental events, or other major events not covered in other performance measures.

Note

(1) "Jobs created" in the TVA fiscal year are newly created, paid positions at a facility of a TVA customer, meaning any entity that purchases power from TVA or its distributor. "Jobs retained" are paid positions at a facility of a TVA customer that were created prior to the current TVA fiscal year and that continue to be filled in the current TVA fiscal year. See Part I, Item I, Business — Economic Development Activities for additional information.

190

Table of Contents

2023 CORPORATE MULTIPLIER MEASURES (0.0 – 1.1 MULTIPLIER)

Note

(1)Includes impact of partnership credits. Partnership credits are wholesale bill credits provided to LPC customers who have signed long-term Partnership Agreements with TVA. For more information, see Part I, Item 1, Business — Customers.

Individual Performance Multiplier Reinforces Pay for Performance

Annually, individual goals for the NEOs are established at the beginning of each performance cycle. These goals tie to the achievement of TVA's mission and strategic objectives. A 50 percent weighting is assigned to business goals, and a 50 percent weighting is assigned to leadership competencies. No numerical measures are assigned to the goals. Rather, at the end of the performance period, the CEO assesses the performance of the other NEOs and informs the Committee of his decision on a multiplier for each NEO. For the CEO Individual Performance Multiplier, each TVA Board member assesses the CEO's performance at the end of a performance period on a scale of 1–5, with "5" representing superior performance. Results of the assessment are provided to the TVA Board Chair who, after consultation with the Committee, and with input from individual Board members, determines the multiplier to be applied to the CEO. For each NEO, the individual performance multiplier can range between 0% to 150% of the calculated payout and can be used to reduce (multiplier below 100%) or increase (multiplier above 100%) the amount of the award.

For 2023, the NEOs were evaluated on individual performance goals and the following leadership competencies:

Leadership Competencies

Inspiring Trust and Engagement

Continuous Improvement

Vision, Innovation, & Strategic Execution

Leadership Courage

Building Organizational Talent

Accountability and Driving for Results

Adaptability

Business Acumen

Effective Communication

Leveraging Diversity

The 2023 individual multipliers and award payouts to the NEOs under the 2023 EAIP are described under each executive's compensation scorecard under 2023 Pay Decisions — 2023 NEO Pay Decisions and Compensation Scorecards below. Award

191

Table of Contents

payouts are also reported in the "Non-Equity Incentive Plan Compensation" column in the Executive Compensation Tables and Narrative Disclosures — Summary Compensation Table.

Long-Term Incentive Plan ("LTIP") Compensation

TVA executives, including the NEOs, participate in the company's LTIP. These individuals make decisions that significantly influence the development and execution of TVA's long-term strategic objectives. As such, awards under TVA's LTIP are designed to reward executives for sustainable success. Since long-term success is supported by a commitment to continued employment, the NEOs are incentivized to remain with the company through the vesting of the LTP awards and LTR awards, as discussed below.



LONG-TERM AWARDS REWARD LONG-TERM SUCCESS									LONG-TERM INCENTIVE AWARDS

•Enterprise-wide performance criteria that are directly aligned with TVA's mission •"Cumulative" performance approach to measure performance achieved over a three-year period with a new three-year performance cycle beginning each year •Potential payment range of 0 percent to 200 percent of target incentive opportunity to enable awards that are commensurate with performance achievements •Award opportunities established for each performance cycle below or near median levels of competitiveness with TVA's peer group •LTP awards vest upon the completion of the three-year performance period, contingent upon continued employment through vesting date and subject to achievement of performance goals •LTR awards vest in one-third increments over three years, contingent upon continued employment on each vesting date

The TVA Board and Mr. Lyash evaluated the appropriateness of the long-term incentive award opportunities for the CEO and other NEOs, respectively. For 2023, the values of the Total LTI awards (LTP awards at target and the LTR awards) were increased from 2022 levels, near market median, following a review of benchmarking and individual performance and reflective of increased tenure and experience. Accordingly, target long-term incentive award opportunities of the NEOs for 2023 were as follows:


NEO	2023-2025 Granted LTI Values ($)						2023-2025 LTI - Increase vs 2022-2024 (%)
	LTP Target		LTR Award		TOTAL LTI			LTP Target	LTR Award	TOTAL LTI
Mr. Lyash	$	3,983,000	$	1,707,000	$	5,690,000		12%	12%	12%
Mr. Thomas	1,425,000		600,000		2,025,000			2%	3%	2%
Mr. Moul	1,425,000		785,000		2,210,000			21%	0%	13%
Mr. Rausch	725,000		330,000		1,055,000			22%	0%	14%
Mr. Fountain	970,000		390,000		1,360,000			26%	18%	24%

192

Table of Contents

Long-Term Performance Awards

TVA's executive compensation program provides for an annual grant of an LTP award with a three-year performance period. During 2023, there were three overlapping LTP awards:


2021–2023 LTP Award						Vested September 30, 2023
2022–2024 LTP Award						Vesting September 30, 2024
2023–2025 LTP Award						Vesting September 30, 2025

The performance metrics and threshold, target, and stretch goals for each metric are determined annually by the TVA Board. Following the TVA Board's approval of performance achievement at the end of each three-year performance period, awards are paid out in cash early in the subsequent fiscal year, or upon death, disability, or retirement, as described in TVA's Long-Term Incentive Plan. For the 2021-2023 LTP award cycle, target performance provides for a 100 percent payout opportunity, performance below threshold provides for no payout, performance at threshold provides for a 50 percent payout opportunity, and performance at stretch provides for a 200 percent payout opportunity. Linear interpolation is used for results between threshold and stretch goals. The TVA Board may apply discretion to adjust the final payout for LTP awards, if necessary, to ensure a fair and balanced outcome.

LTP
Incentive
Amount

Target
Value

Percent of Opportunity Achieved
(0% to 200%)

For the three-year performance period ended September 30, 2023, the TVA Board previously approved five overall long-term incentive measures of TVA performance to be applied to all participants in the LTP. The 2021–2023 performance measures, along with the weighting ascribed to each, are shown below as a percentage of the total LTP award opportunity at target-level performance.

193

Table of Contents

2021-2023 LTP

PERFORMANCE

METRICS

The 2021–2023 LTP metrics are described in detail below.

Non-Fuel Delivered Cost of Power

What this measures: non-fuel expenses (cents/kWh)

The Non-Fuel Delivered Cost of Power is a financial measure equal to the sum of (i) non-fuel operating and maintenance ("O&M") expense, (ii) base capital cost, (iii) interest expense, and (iv) other expense divided by budgeted electric power sales.

Why Is This Metric Used?

This measure drives performance through activities that management can control. It aligns with TVA's strategic objective of maintaining low rates and focuses on aligning TVA’s non-fuel costs associated with generation, transmission, statutory mission services, and additional customer services with revenue. Non-Fuel Delivered Cost of Power supports retail rate objectives and aligns to the business plan commitment.

Load Not Served

What this measures: transmission system outages that affect TVA customers

Load Not Served ("LNS") is a measure of the magnitude and duration of transmission system outages that affect TVA customers expressed in system minutes. An automatic customer interruption with a duration of one minute or greater is tracked as an LNS event. LNS events caused by TVA on a distributor system will also count as a TVA event even if the TVA system remains energized. LNS excludes interruptions due to declared major events, variances, gunfire, vandalism, and verified tornadoes.

Why Is This Metric Used?

TVA manages this critical indicator to reduce the impact of customer outages.

External Performance Indicators for the TVA Nuclear Fleet

What this measures: nuclear operations performance

External Performance Indicators for the TVA Nuclear Fleet is calculated using a weighted combination of key performance indicators based on standard nuclear industry definitions for station performance, with the maximum obtainable being 100 points.

Why Is This Metric Used?

This measure is a recognized industry standard for nuclear operations performance based on safety and reliability.

Stakeholder Survey

What this measures: external perception and reputational events

Stakeholder Survey is conducted among the general public, public officials, economic development leaders, and business/community leaders in the TVA service area to assess public opinion of TVA.

Why Is This Metric Used?

This measure is conducted to assess the external reputation and perception of TVA and TVA's effectiveness in carrying out its mission and strategic objectives.

Customer Survey

What this measures: TVA's focus on meeting and exceeding customer expectations

Customer Survey is an annual survey of LPCs and Direct-Serve Customers focused on better understanding customer loyalty and related performance drivers.

Why Is This Metric Used?

This measure is to help TVA better understand the strength of the bond with its customers and identify how TVA can positively affect this relationship.

194

Table of Contents

Consistent with its public power mission, TVA's long-term performance metrics include the results of surveys that assess the external reputation and perception of TVA and TVA's effectiveness in carrying out its mission and strategic objectives. These metrics reflect TVA's focus on meeting or exceeding customer expectations and identifying areas for continuous improvement.

In setting the goal for each metric, the TVA Board considers budgeted amounts in the company's approved business plans, actual performance in recent years, and level of attainment. The TVA Board also considers TVA's strategic business plan priorities and strategic benchmarking goals, customer and stakeholder feedback, environmental and regulatory concerns and goals, and the competitive environment. Achievement of the target goal would result in a 100 percent payout opportunity with respect to that goal. A threshold goal is also set for each metric, so that no payout would occur with respect to metrics that fail to achieve that threshold. Additionally, a stretch goal for each metric is set to incentivize and reward exceptional performance. Linear interpolation is used for results between threshold and stretch goals.

2021–2023 LTP Award Performance Results

The performance results on the 2023 TVA Long-Term Performance Scorecard are set forth below. Performance resulted in an adjusted payout of 136 percent of target opportunity.

2021–2023 Long-Term Performance Scorecard

Notes

(1)Non-Fuel Delivered Cost of Power = (Non-Fuel Operating and Maintenance Expense + Base Capital Cost + Interest Expense + Other Expense) / Budgeted Electric Power Sales. For the 2021–2023 performance cycle, the Non-Fuel Delivered Cost of Power measure was calculated using an average of the 2021, 2022, and 2023 results.

(2)Load Not Served = (Percentage of Total Load Not Served) x (Number of Minutes in the Period). For the 2021–2023 performance cycle, the Load Not Served measure was calculated using an average of the 2021, 2022, and 2023 results.

(3)The External Performance Indicators for TVA Nuclear Fleet measure is calculated using a weighted combination of key performance indicators based on standard nuclear industry definitions for station performance, with the maximum obtainable being 100 points. For the 2021–2023 performance cycle, the External Performance Indicators for the TVA Nuclear Fleet measure was calculated using the 2023 results.

(4)For the 2021–2023 performance cycle, the Stakeholder Survey was calculated using an average of the 2021, 2022, and 2023 results.

(5)For the 2021–2023 performance cycle, the Customer Survey was calculated using an average of the 2021, 2022, and 2023 results.

In reviewing the 2021–2023 performance period, the TVA Board considered strong performance in several areas along with below target performance for External Performance Indicators for the TVA Nuclear Fleet and Customer Survey in 2023. Below are key highlights for this performance period:

ü Strong transmission grid system reliability performance

ü Financial performance

•TFOs at September 30, 2023 are among the lowest in over 30 years

•Delivered three years of customer credits

ü Nuclear performance

•Browns Ferry, Sequoyah, and Watts Bar nuclear sites performed at exemplary levels compared to industry peers

195

Table of Contents

•Browns Ferry Unit 2 exceeded its continuous run record (562 days) and achieved its first breaker-to-breaker continuous run record - 665 consecutive days (February 2023)

•Sequoyah maintained station performance in top quartile for the entire fiscal year

•Watts Bar Unit 1 achieved its second breaker-to-breaker continuous run – 496 consecutive days (April 2023). This duration is second to the breaker-to-breaker continuous run record of 512 days (September 2000)

•External Performance Indicators for the TVA Nuclear Fleet - fell just below target for 2023 due to an outage at Watts Bar Unit 2 that occurred late in 2023

ü Customer relationships

•96% of 153 LPCs have signed 20-year Partnership Agreements with TVA

•TVA offered regulatory relief and flexibility so LPCs could help their communities

•Stakeholder Survey - three-year survey results exceeded TVA's stretch goal, driven by consistent above target performance for each year in the period

•Customer Survey - despite improving commitment levels in 2021 and the highest ever commitment score in 2022, 2023 resulted in an average score below target for the three-year performance period

ü Continued economic development efforts have been successful (2021-2023)

•Companies have announced $28.2 billion in projected investments, and

•Approximately 205,800 jobs (61,300 jobs created and 144,500 jobs retained) are expected to be created/retained

The TVA Board, using its discretion to review results and approve adjustments in payouts, adjusted the calculated 2023 LTP payout percentage from 146 to 136. This adjustment recognizes TVA's strong performance over the three-year performance period while also acknowledging the events of Winter Storm Elliott. Payouts to the NEOs for the 2021–2023 LTP Award are described under each executive's compensation scorecard under 2023 Pay Decisions – 2023 NEO Pay Decisions and Compensation Scorecards below and reported in the Executive Compensation Tables and Narrative Disclosures – Summary Compensation Table under "Non-Equity Incentive Plan Compensation."

2022–2024 Outstanding LTP Performance Cycle

The TVA Board previously approved the following overall LTP measures of TVA performance for all participants for the three-year cycle ending September 30, 2024 (awards to be paid in November 2024):


Performance Metric and Weighting		Threshold Target Stretch (50% Payout) (100% Payout) (200% Payout)

Non-Fuel Delivered Cost of Power(1)	45%
		3.67	3.53	3.39


Load Not Served(2)	30%
		4.5	3.9	3.2


External Performance Indicators for the TVA Nuclear Fleet(3)	15%
		93.5	96.0	98.5


Powerful Partnerships Survey(4)	10%
		74.0	78.0	82.0

Notes

(1)Metric has same definition as for the 2021-2023 LTP awards. For the 2022-2024 performance cycle, the Non-Fuel Delivered Cost of Power measure will be calculated using an average of the 2022, 2023, and 2024 results.

(2)Metric has same definition as for the 2021-2023 LTP awards. For the 2022-2024 performance cycle, the Load Not Served measure will be calculated using an average of the 2022, 2023, and 2024 results.

(3)Metric has same definition as for the 2021-2023 LTP awards. For the 2022-2024 performance cycle, the External Performance Indicators for the TVA Nuclear Fleet measure will be calculated based on 2024 results.

(4)The Powerful Partnerships Survey measure is conducted among customers, elected officials, business and economic development leaders, and the general public in the TVA service area to assess the strength of various stakeholder relationships with TVA. For the 2022-2024 performance cycle, the Powerful Partnerships Survey measure will be calculated using an average of the 2022, 2023, and 2024 results.

Beginning with the 2022-2024 performance cycle, the Powerful Partnerships Survey has been added as a new measure, with a weighting of 10%, and replaces the former Stakeholder Survey and Customer Survey measures, as illustrated in the above chart.

196

Table of Contents

2023–2025 Outstanding LTP Performance Cycle

In May 2022, the TVA Board approved the following overall LTP measures of TVA performance for all participants for the three-year cycle ending September 30, 2025 (awards to be paid in November 2025):


Performance Metric and Weighting		Threshold Target Stretch (50% Payout) (100% Payout) (200% Payout)

Non-Fuel Delivered Cost of Power(1)	45%
		3.44	3.31	3.18


Load Not Served(2)	30%
		4.5	3.9	3.2


External Performance Indicators for the TVA Nuclear Fleet(3)	15%
		Industry Median	Top Quartile	Top Fleet


Powerful Partnerships Survey(4)	10%
		75.0	79.0	83.0

Notes

(1)Metric has same definition as for the 2021-2023 LTP awards. For the 2023-2025 performance cycle, the Non-Fuel Delivered Cost of Power measure will be calculated using an average of the 2023, 2024, and 2025 results.

(2)Metric has same definition as for the 2021-2023 LTP awards. For the 2023-2025 performance cycle, the Load Not Served measure will be calculated using an average of the 2023, 2024, and 2025 results.

(3)Metric has same definition as for the 2021-2023 LTP awards. For the 2023-2025 performance cycle, the External Performance Indicators for the Nuclear Fleet measure will be calculated using 2025 results.

(4)Metric has same definition as for the 2022-2024 LTP awards. For the 2023-2025 performance cycle, the Powerful Partnerships Survey measure will be calculated using an average of the 2023, 2024, and 2025 results.

Long-Term Retention Awards

As a corporate agency of the U.S., TVA does not have equity securities that it can use to provide stock awards, options, or other equity-based awards as compensation for its employees. The purpose of the retention awards under the LTIP is to provide a retention incentive similar to restricted stock or restricted stock units. These grants are intended to encourage executives to remain with TVA and to provide, in combination with salary, EAIP, and LTP grants, a competitive level of TDC. Grants are generally effective as of October 1 and will become one-third vested on each subsequent September 30 or upon death, disability, or retirement if earlier on a pro-rated basis. Each award will be paid in a lump sum within two months of vesting.

2023 Long-Term Retention Award Grant

Following the market assessment conducted by FW Cook, effective October 1, 2022, TVA granted LTR awards to the NEOs. These awards vest in three equal tranches on September 30, 2023, September 30, 2024, and September 30, 2025, contingent upon continued employment on each vesting date. The amounts of these awards are set forth under Long-Term Incentive Plan ("LTIP") Compensation above.

2023 Vesting of Outstanding Retention Awards

LTR awards that vested in 2023 are described under 2023 Pay Decisions — 2023 NEO Pay Decisions and Compensation Scorecards below and are reported in the Executive Compensation Tables and Narrative Disclosures — Summary Compensation Table under "Non-Equity Incentive Plan Compensation." The vesting schedule for the three LTR awards outstanding in 2023 is set forth below.

197

Table of Contents

2023 VESTING OF OUTSTANDING RETENTION AWARDS

2023 Pay Decisions

2023 CEO Pay Decisions Overview

CEO TDC EARNED IN 2023 - $7,985,860


Base Salary	$	1,227,000	2023 salary
Annual Performance Incentive under Executive Annual Incentive Plan	$	1,302,384	185 percent of target EAIP award, followed by 0.85 Corporate Multiplier; 45 percent Individual Performance Multiplier then applied
Long-Term Performance Incentive	$	3,963,176	136 percent of target LTP earned for the three-year performance cycle ended September 30, 2023
Long-Term Retention Incentive	$	1,493,300	2023 tranche of 2021, 2022, and 2023 LTR awards

Each year, the Committee makes two key compensation decisions with respect to CEO compensation: the amount of TDC opportunity (which is forward-looking and incentivizes the CEO to perform), and the amount of TDC earned (which rewards the CEO for his prior performance).

2023 CEO Total Direct Compensation Opportunity

On November 10, 2022, the TVA Board approved compensation adjustments for Mr. Lyash for 2023, increasing each component of Mr. Lyash's TDC over 2022 levels. The adjustments were made following the annual review of FW Cook’s market analysis and benchmarking of CEO compensation, and in consideration of Mr. Lyash's increased tenure with TVA and his 2022 performance. The target TDC opportunity granted to Mr. Lyash in 2023 is illustrated below.

198

Table of Contents

CEO 2023 TARGET TOTAL DIRECT COMPENSATION OPPORTUNITY(1)(2)

Note

(1) Target market assessment effective October 2022 and included market composite of WTW survey sample and proxy peer group. This composite group includes 43 investor-owned utilities and government/non-profit entities further described in Item 11, Executive Compensation — Compensation Discussion and Analysis — Compensation Setting Process — TVA Competes with Peers for Talent — List of Compensation Peer Companies.

(2) Market 50th Percentile amounts are benchmarks for each compensation component which are determined independently and do not sum together.

2023 CEO TARGET TOTAL DIRECT COMPENSATION OPPORTUNITY BELOW MARKET(1)(2)

Note

(1)Target market assessment effective October 2022 and included market composite of WTW survey sample and proxy peer group. This composite group includes 43 investor-owned utilities and government/non-profit entities further described in Item 11, Executive Compensation — Compensation Discussion and Analysis — Compensation Setting Process — TVA Competes with Peers for Talent — List of Compensation Peer Companies.

(2)Market 25th and 50th Percentile amounts are benchmarks for each compensation component which are determined independently and do not sum together.

199

Table of Contents

2023 CEO Total Direct Compensation Earned

The TDC that Mr. Lyash earned for 2023 reflected individual and company performance that met and exceeded most targets and was approximately 66% performance-based compensation.

CEO 2023 TOTAL DIRECT COMPENSATION EARNED

Note

(1)2021-2023 Long-Term Performance Incentive award reflects a three-year performance cycle.

(2)Long-Term Retention Incentive amount reflects the 2023 tranches of the 2021, 2022, and 2023 LTR awards.

The annual incentive award that Mr. Lyash received reflected an Individual Performance Multiplier of 45%. The Committee and TVA Board reviewed Mr. Lyash's 2023 performance and considered his higher level of accountability related to Winter Storm Elliott and the employee fatality in compensation decisions. See 2023 Pay Decisions - 2023 NEO Pay Decisions and Compensation Scorecards below for more information.

Why Total Compensation Earned Differs From Compensation Reported

2023 CEO TOTAL COMPENSATION COMPONENTS


Summary Compensation Table Total Compensation =	$	10,544,082


	$27,450
	Other

$7,985,860			$2,530,772
Total Direct Compensation Earned			Increase in Value of Supplemental Executive Retirement Plan

			Amount does not represent payments actually received by CEO(1)

Note

(1) Amount reflects change in present value of the accumulated pension/SERP benefits during the prior year, determined using assumptions consistent with those used in the financial statements in this Annual Report, set forth in Note 20 — Benefit Plans.

Unlike the amounts reported in the Summary Compensation Table, Mr. Lyash's TDC Earned represents the annual pay decisions by the Committee that specifically reflect its assessment of the company's performance and individual performance and reward the employee for satisfaction of incentive award conditions (enterprise performance and continued employment). Other elements included in the Summary Compensation Table, such as changes in pension values and vesting of recruitment and relocation incentives, are excluded from TDC Earned because they do not relate to performance and are outside the scope of the Committee's annual pay decisions. The Committee therefore believes that TDC Earned renders a more accurate and up-to-date reflection of its assessment of performance.

200

Table of Contents

CEO Pay Ratio Disclosure

As required by Section 953(b) of the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 and Item 402(u) of Regulation S-K, TVA is providing the following information regarding the annual total compensation of TVA's CEO position and the annual total compensation of the median employee of the company:

•The total compensation for the CEO position for 2023 was $10,544,082.

•For 2023, the median employee's annual total compensation was $146,466.

Based on this information, the pay ratio of the total compensation for the CEO position to the median employee was approximately 72 to 1.

To identify the median employee and to determine the annual total compensation of the median employee, TVA took the following steps:

•TVA selected September 30, 2023, as the date on which to identify its median employee. On September 30, 2023, TVA's employee population that had earnings in 2023 (including full-time, part-time, and temporary employees) consisted of 10,795 individuals located in the U.S.

•In order to identify the median employee from its employee population, TVA compared the compensation that would be included in Box 5 (Medicare Wages and Tips) of Form W-2, which includes salary, overtime, and incentive compensation, for the period from October 1, 2022 to September 30, 2023. Box 5 compensation was used as it is representative of the compensation received by all employees and is readily available and objective.

•After identifying its median employee, TVA calculated that employee's compensation for 2023 as though that compensation was being calculated for purposes of the Summary Compensation Table, resulting in annual total compensation of $146,466.

The above pay ratio is a reasonable estimate calculated in a manner consistent with Item 402(u) of Regulation S-K. Because Item 402(u) provides companies with flexibility to select the methodology and assumptions used to identify the median employee and to calculate the pay ratio, the pay ratio reported by TVA may not be comparable to the pay ratios reported by other companies.

2023 CEO Pay Ratio Below Median Among Peers

As reflected above, TVA's CEO target TDC is low compared to its 2023 compensation peer group on an absolute basis and is also low compared to its peers in the context of organizational pay ratios. Based on TVA's 2023 pay ratio noted above and the pay ratio disclosed in its peers' most recent public disclosures, TVA's current pay ratio is below the 50th percentile, and approximates the 25th percentile of its peers. Peers used are those shown under Proxy Peer Group of Investor-Owned Utilities in the Compensation Setting Process — TVA Competes with Peers for Talent — List of Compensation Peer Companies.

2023 NEO Pay Decisions and Compensation Scorecards

The following pages show each NEO's 2023 Total Direct Compensation earned, 2023 TDC opportunities granted, and the Committee's (or the CEO's in the case of NEOs other than the CEO) rationale for those pay decisions.

201

Table of Contents

JEFFREY J. LYASH

2023 TOTAL DIRECT COMPENSATION EARNED

President and CEO

7,985,860

Hire Date: April 2019

2023 INDIVIDUAL PERFORMANCE HIGHLIGHTS

•Strong organizational performance - record-setting achievements across broad range of metrics.

•Guided TVA fleet through historic weather and power demand event - Winter Storm Elliott; all-time record single-day energy demand (more than 740 million kWh hours) and highest winter peak power demand (33,427 MW).

•Strong financial performance - debt among the lowest in over 30 years; 2023 was the fourth year of base flat wholesale rates; significant revenues returned to the customers via pandemic and long-term partnership credits.

•TVA Nuclear Fleet demonstrated consistent, exemplary, top performance.

•Strengthened public power model - by leveraging partnerships designed to advance electric vehicles and charging stations throughout the Tennessee Valley.

•TVA's repatriation of Native American remains was a culmination of many years of work with the tribes, surpassing other federal agencies in creating this outcome.

•Asset construction program initiated (to add energy and capacity) - hydro plant life extension, nuclear uprate, renewables development, energy storage development, and gas generation construction programs.

•Maintained strong focus on IwD across all organizational levels to help sustain momentum towards a more diverse TVA.

•Strengthened customer relationships: 96% of LPCs have signed TVA 20-year Partnership Agreement.

•Continued strong economic development focus, recruiting industries and adding significant capital and jobs to the Valley.

•TVA received numerous recognitions/awards: for military friendly, veterans, and diversity; 2023 Forbes America's Best Employers by State; 2023 Nuclear Energy Institute ("NEI") Top Innovative Practice Award; Smart Energy Consumer Collaborative ("SECC") 2023 Best Practices Award, SMB Engagement Award for the Community Centered Growth Program.

•Overall safety performance - industry top decile.

2023 COMMUNITY/INDUSTRY ENGAGEMENT

▪Nuclear Energy Institute - Board Chair

▪Institute of Nuclear Power Operations - Vice Chair of Board

▪World Association of Nuclear Operators - Governor, Global Board and Chairman, Atlanta Centre

▪Drexel University - Board of Trustees

▪Boys and Girls Clubs of the Tennessee Valley and the United Way - actively engaged supporter

Dre

Base Salary. Mr. Lyash's salary was increased 6.49 percent to $1,227,000 at the beginning of 2023, reflecting performance and positioning to a more competitive base salary. This amount is below the 2023 compensation peer group median.

EAIP Payment Earned. Organizational performance, including strong fiscal responsibility and operational/reliability performance, under the TVA EAIP Enterprise Scorecard exceeded targets for all measures reflecting a 185 percent opportunity achieved against target. Company performance under the TVA Corporate Multiplier measures was strong for several key measures. However, the TVA Board considered the events of Winter Storm Elliott and an employee fatality and approved a 0.85 EAIP Corporate Multiplier.

The TVA Board approved an Individual Performance Multiplier of 45 percent for Mr. Lyash for 2023 given his performance and the events of Winter Storm Elliott and an employee fatality.

Annual Salary

Annual Target Incentive Opportunity

Percent of Opportunity Achieved (0% to 200%)

Corporate Multiplier
(0 to 1.1)

Individual Performance Multiplier (0% to 150%)

EAIP Payout

$1,227,000

150%

185%

0.85

45%

$1,302,384

Long-Term Incentives Earned

Long-Term Performance Awards Earned. Organizational performance under the 2021–2023 LTP program was strong in several areas, including key areas where performance exceeded target expectations. In light of performance results, including strong reliability performance and stakeholder relationships, and considering the events of Winter Storm Elliott, the TVA Board exercised its discretion to adjust the calculated 2023 LTP payout percentage from 146 percent to 136 percent.

Target Amount

Percent of Opportunity Achieved (0% to 200%)

LTP Incentive Amount

$2,914,100

136%

$3,963,176

Long-Term Retention Award Earned. Mr. Lyash earned $1,493,300 in 2023 upon the vesting of the 2023 tranches of his 2021, 2022, and 2023 LTR program awards. The LTR awards vest ratably over a three-year period, subject to continued employment on each vesting date.

Long-Term Incentive Opportunities Granted

2023–2025 Long-Term Performance Award Opportunity. Effective October 1, 2022, Mr. Lyash was granted a 2023–2025 LTP program award with a target opportunity of $3,983,000, which will vest on September 30, 2025. Actual payout will depend on performance against targets at the end of the three-year performance period.

2023 Long-Term Retention Award Opportunity. Effective October 1, 2022, Mr. Lyash was granted a 2023 LTR program award of $1,707,000 that vests ratably over a three-year period, subject to continued employment on each vesting date. The first tranche was earned in 2023 as described above.

202

Table of Contents

JOHN M. THOMAS, III

2023 TOTAL DIRECT COMPENSATION EARNED

Executive Vice President and Chief Financial and Strategy Officer

$3,578,601

Hire Date: November 2005

2023 INDIVIDUAL PERFORMANCE HIGHLIGHTS

•Maintained flat wholesale base rates during 2023 amid rising inflation and interest rate environments.

•Developed programmatic approach to identify and leverage federal funding opportunities.

•Partnerships with auto industry, Tennessee Valley states, LPCs, and customers to help advance 15 electric vehicle Fast Charge Network sites to completion, with 55 additional sites under developmental contract.

•Southeast Hydrogen Hub partnership to establish the region's hydrogen infrastructure.

•Replenished Interruptible Power ("IP") economic call rights depleted during Winter Storm Elliott by recruiting new participants and issuing a summer 2023 IP Special Offer.

•Executed CFO, strategic planning, and business planning functions that exceeded enterprise goals in total spend, debt levels, and net income.

•Signed multi-year interagency agreement with DOE for the implementation of energy efficiency initiatives at DOE's Y-12 facility in Oak Ridge.

•Continued community support through extended pandemic credits.

•Maintaining investor relations and financial integrity through timely SEC reporting with unqualified opinion and no significant issues.

•TVA residential rates are in the top quartile of lowest rates among the top 100 U.S. Utilities and TVA industrial rates are in the top decile of lowest rates among the top 100 U.S. Utilities based on June 2023 12-month rolling average from EIA.

•Launched three new Digital Centers of Excellence (Enterprise Productivity, Internet of Things, and Innovation).

•TVA was honored with the SECC 2023 Best Practices Award, SMB Engagement Award for the Community Centered Growth program.

•TVA earned the 2023 Energy Efficiency - Program Delivery award from the U.S. Environmental Protection Agency and the U.S. DOE for TVA's Home Uplift Program.

2023 COMMUNITY/INDUSTRY ENGAGEMENT

•Siskin Children's Institute - Executive Committee; chair, Finance Committee

•Electric Power Research Institute - Audit Committee

•Chattanooga Chamber of Commerce - CEO Round Table

Base Salary. Mr. Thomas' salary was increased 5.00 percent to $835,380 at the beginning of 2023, reflecting performance and positioning to maintain a competitive base salary.

The CEO approved an Individual Performance Multiplier of 75 percent for Mr. Thomas for 2023 given his performance and the events of Winter Storm Elliott and an employee fatality.

Annual Salary

Annual Target Incentive Opportunity

Percent of Opportunity Achieved (0% to 200%)

Corporate Multiplier
(0 to 1.1)

Individual Performance Multiplier (0% to 150%)

EAIP Payout

$835,380

80%

185%

0.85

75%

$788,181

Long-Term Incentives Earned

Target Amount

Percent of Opportunity Achieved (0% to 200%)

LTP Incentive Amount

$1,039,000

136%

$1,413,040

Long-Term Retention Award Earned. Mr. Thomas earned $542,000 in 2023 upon the vesting of the 2023 tranches of his 2021, 2022, and 2023 LTR program awards. The LTR awards vest ratably over a three-year period, subject to continued employment on each vesting date.

Long-Term Incentive Opportunities Granted

2023–2025 Long-Term Performance Award Opportunity. Effective October 1, 2022, Mr. Thomas was granted a 2023–2025 LTP program award with a target opportunity of $1,425,000, which will vest on September 30, 2025. Actual payout of the award will depend on performance against targets at the end of the three-year performance period.

2023 Long-Term Retention Award Opportunity. Effective October 1, 2022, Mr. Thomas was granted a 2023 LTR program award of $600,000 that vests ratably over a three-year period, subject to continued employment on each vesting date. The first tranche was earned in 2023 as described above.

203

Table of Contents

DONALD A. MOUL

2023 TOTAL DIRECT COMPENSATION EARNED

Executive Vice President and
Chief Operating Officer

$3,066,865

Hire Date: June 2021

2023 INDIVIDUAL PERFORMANCE HIGHLIGHTS

•Effectively maintained bulk grid stability during Winter Storm Elliott, as well as employee performance with no safety events; supported post-event meetings with external stakeholders and LPCs to examine pre-event actions and plans for after-action review work.

•Maintained stable and secure system during August 2023 three-day consecutive demand above 31,000 MW.

•Repatriation of Native American remains - culmination of many years of work with tribes and commitment from TVA, surpassing other federal agencies in creating this outcome.

•Achieved supply chain cost savings of $5.3 million.

•Successful launch of Colbert Combustion Turbine site (three new units) in Alabama, adding approximately 681 MWs of natural gas generation - enough dispatchable electricity to power over 400,000 homes.

•Successful launch of Skyhawk solar facility in northwest Tennessee and utility scale battery projects at Bull Run and Kingston sites.

•Championed unique Labor Forecast Center - to strengthen union partnerships and help TVA project, plan, and meet evolving future skilled labor and energy needs.

•Leveraged collaborations for investing in TVA's nuclear future.

•Maintained TVA's SIIR at top decile and improved OSHA Recordable Rate to top decile.

•Operational challenges of Winter Storm Elliott (December 2022) and employee fatality (September 2023).

•Led, supported, and participated in activities leading to the completion of the signing of the BWRX-300 Technology Collaboration Agreement.

•Championed, led, and supported the realization of an estimated $179 million in continuous improvement annual benefits across the enterprise.

•Partnered with Ford to facilitate Blue Oval City's anticipated energy draw, including installation of one of the largest TVA direct-serve substations and making significant transmission investments to support anticipated further growth in the Blue Oval City region.

2023 COMMUNITY/INDUSTRY ENGAGEMENT

•Zoo Knoxville - Board of Directors and Circle of Friends

•University of Tennessee Nuclear Engineering - Board of Advisors

•Penn State University - Founder, Moul Family Fund for Reactor Operator Internship

•Leadership Knoxville - Class of 2023

•Nuclear Electric Insurance Limited - Board of Directors

Base Salary. Mr. Moul's salary was increased 4.00 percent to $795,600 at the beginning of 2023, reflecting performance and positioning to maintain a competitive base salary.

The CEO approved an Individual Performance Multiplier of 75 percent for Mr. Moul for 2023 given his performance and the events of Winter Storm Elliott and an employee fatality.

Annual Salary

Annual Target Incentive Opportunity

Percent of Opportunity Achieved (0% to 200%)

Corporate Multiplier
(0 to 1.1)

Individual Performance Multiplier (0% to 150%)

EAIP Payout

$795,600

80%

185%

0.85

75%

$750,649

Long-Term Incentives Earned

Target Amount

Percent of Opportunity Achieved (0% to 200%)

LTP Incentive Amount

$588,750

136%

$800,700

Long-Term Retention Award Earned. Mr. Moul earned $719,916 in 2023 upon the vesting of the 2023 tranches of his 2021, 2022, and 2023 LTR program awards. The LTR program awards vest ratably over a three-year period, subject to continued employment on each vesting date.

Long-Term Incentive Opportunities Granted

2023–2025 Long-Term Performance Award Opportunity. Effective October 1, 2022, Mr. Moul was granted a 2023–2025 LTP program award with a target opportunity of $1,425,000 which will vest on September 30, 2025. The actual payout will depend on performance against targets at the end of the three-year performance period.

2023 Long-Term Retention Award Opportunity. Effective October 1, 2022, Mr. Moul was granted a 2023 LTR program award of $785,000 that vests ratably over a three-year period, subject to continued employment on each vesting date. The first tranche was earned in 2023 as described above.

Other Compensation

Recruitment and Relocation Incentive. Mr. Moul was paid $100,000 in 2023 as the third and final installment of a deferred cash relocation incentive under his employment offer letter. Mr. Moul received an additional $110,182 in relocation benefits as reported in the Executive Compensation Tables and Narrative Disclosures – Summary Compensation Table under "All Other Compensation".

204

Table of Contents

TIMOTHY S. RAUSCH

2023 TOTAL DIRECT COMPENSATION EARNED

Executive Vice President and

Chief Nuclear Officer

$2,454,805

Hire Date: October 2018

2023 INDIVIDUAL PERFORMANCE HIGHLIGHTS

•Through leadership, talent development, and the continued investment in assets and people, TVA continues to make progress toward its goal of being the Nation’s Top Nuclear Fleet by 2025 as part of its Operational Excellence priority.

•TVA's Nuclear fleet has demonstrated consistent, exemplary, top performance:

–Browns Ferry, Sequoyah, and Watts Bar nuclear sites - exemplary performance levels compared to industry peers.

–Browns Ferry Unit 2 - exceeded its continuous run record (562 day run) and achieved its first breaker-to-breaker continuous run record - 665 consecutive days.

–Sequoyah - top quartile station performance for the entire fiscal year (based on standard nuclear industry definition).

–Watts Bar Unit 1 - achieved second breaker-to-breaker continuous run – 496 consecutive days (April 2023). Current record - 512 days (September 2000).

•Achieved 100% pass rate on recent licensing class (in support of a sustainable operations pipeline).

•Results for Annualized Nuclear Online Reliability Loss Factor is a strong indicator of operating as a top performing organization.

•Zero industrial, radiological, environmental, or nuclear significant events.

•TVA Nuclear recognitions/awards: NEI Top Innovative Practice Award for the Virtual Reality Polar Crane Operator Simulation; TVA Women in Nuclear Chapter - Excellence in Networking Award.

Base Salary. Mr. Rausch's salary was increased 12.00 percent to $637,640 at the beginning of 2023, reflecting performance and positioning to maintain a competitive base salary.

The CEO approved an Individual Performance Multiplier of 115 percent for Mr. Rausch for his performance.

Annual Salary

Annual Target Incentive Opportunity

Percent of Opportunity Achieved (0% to 200%)

Corporate Multiplier
(0 to 1.1)

Individual Performance Multiplier (0% to 150%)

EAIP Payout

$637,640

70%

185%

0.85

115%

$807,165

Long-Term Incentives Earned

2023 COMMUNITY/INDUSTRY ENGAGEMENT

•University of Tennessee at Chattanooga - Engineering & Computer Science Advisory Board

•American Association of Blacks in Energy - active member

•Chambliss Center for Children - fundraiser platinum sponsor

•Nuclear Energy Institute - Nuclear Strategy Industry Advisory Committee

•INPO Senior Nuclear Plant Manager - quarterly course instructor

•INPO Executive Advisory Group newly appointed Chair

•U.S. Women in Nuclear Executive Advisory Committee member

Target Amount

Percent of Opportunity Achieved (0% to 200%)

LTP Incentive Amount

$500,000

136%

$680,000

Long-Term Retention Award Earned. Mr. Rausch earned $330,000 in 2023 upon the vesting of the 2023 tranches of his 2021, 2022, and 2023 LTR program awards. The LTR program awards vest ratably over a three-year period, subject to continued employment on each vesting date.

Long-Term Incentive Opportunities Granted

2023–2025 Long-Term Performance Award Opportunity. Effective October 1, 2022, Mr. Rausch was granted a 2023–2025 LTP program award with a target opportunity of $725,000, which will vest on September 30, 2025. Actual payout will depend on performance against targets at the end of the three-year performance period.

2023 Long-Term Retention Award Opportunity. Effective October 1, 2022, Mr. Rausch was granted a 2023 LTR program award of $330,000 that vests ratably over a three-year period, subject to continued employment on each vesting date. The first tranche was earned in 2023 as described above.

205

Table of Contents

DAVID B. FOUNTAIN

2023 TOTAL DIRECT COMPENSATION EARNED

Executive Vice President and General Counsel

$2,260,243

Hire Date: June 2020

2023 INDIVIDUAL PERFORMANCE HIGHLIGHTS

•Provided critical legal and regulatory support of TVA's current asset plan, including the Clean Energy RFP for up to 5,000 MW and assistance with the Cumberland and Kingston site transitions.

•Provided legal and regulatory support for TVA's New Nuclear Program and Clinch River Project, including negotiations associated with a multi-party collaborative arrangement to advance the global deployment of SMR reactor technology.

•Counseled TVA for favorable outcomes throughout a variety of unique legal challenges; maintained and strengthened key relationships in Congress and the Administration as well as with TVA leadership and union partners.

•Successfully defended TVA and the public power model in multiple litigated cases.

•Managed the response to the review conducted by NERC, FERC, and the SERC Reliability Corporation of TVA's actions during Winter Storm Elliott (December 2022).

•Served as corporate secretary for the TVA Board and provided counsel on effective corporate governance.

•Supported the timely filing of documents with the Securities and Exchange Commission on Forms 10-K, 10-Q, and 8-K and TVA financing transactions.

•Executive sponsor - TVA’s ESG framework team which coordinates various ESG initiatives across the enterprise.

•Maintained best-in-class ethics program as TVA's Designated Agency Ethics Official.

2023 COMMUNITY/INDUSTRY ENGAGEMENT

•University of North Carolina, Kenan-Flagler Business School Energy Center - Advisory Board

•Edison Electric Institute Legal Committee

•Presentations at the annual conferences of the National Association of Regulatory Utility Commissioners, Southern States Energy Board, Tennessee Valley Public Power Association Legal Conference, and Tennessee Valley Industrial Committee

•United Way of Greater Knoxville - Board of Directors

•Shepherd's Table Soup Kitchen - Board of Directors

Base Salary. Mr. Fountain's salary was increased 9.00 percent to $629,802 at the beginning of 2023, reflecting his performance and positioning to maintain a competitive base salary.

The CEO approved an Individual Performance Multiplier of 75 percent for Mr. Fountain for 2023 given his performance and the events of Winter Storm Elliott and an employee fatality.

Annual Salary

Annual Target Incentive Opportunity

Percent of Opportunity Achieved (0% to 200%)

Corporate Multiplier
(0 to 1.1)

Individual Performance Multiplier (0% to 150%)

EAIP Payout

$629,802

70%

185%

0.85

75%

$519,941

Long-Term Incentives Earned

Target Amount

Percent of Opportunity Achieved (0% to 200%)

LTP Incentive Amount

$562,500

136%

$765,000

Long-Term Retention Award Earned. Mr. Fountain earned $345,500 in 2023 upon the vesting of the 2023 tranches of his 2021, 2022, and 2023 LTR program awards. The LTR awards vest ratably over a three-year period, subject to continued employment on each vesting date.

Long-Term Incentive Opportunities Granted

2023–2025 Long-Term Performance Award Opportunity. Effective October 1, 2022, Mr. Fountain was granted a 2023–2025 LTP program award with a target opportunity of $970,000 which will vest on September 30, 2025. The actual payout will depend on performance against targets at the end of the three-year performance period.

2023 Long-Term Retention Award Opportunity. Effective October 1, 2022, Mr. Fountain was granted a 2023 LTR program award of $390,000 that vests ratably over a three-year period, subject to continued employment on each vesting date. The first tranche was earned in 2023 as described above.

206

Table of Contents

Executive Compensation Tables and Narrative Disclosures

Summary Compensation and Grants of Plan-Based Awards

The following table provides information on compensation earned by each of the NEOs in 2023 (and 2022 and 2021, as applicable).

SUMMARY COMPENSATION TABLE


Name and Principal Position	Year	Salary		Bonus(1)		Non-Equity Incentive Plan Compensation(2)		Change in Pension Value and Nonqualified Deferred Compensation Earnings(3)		All Other Compensation(4)		Total
Jeffrey J. Lyash	2023	$	1,227,000	$	—	$	6,758,860	$	2,530,772	$	27,450	$	10,544,082
President and Chief	2022	1,152,250		—		7,040,428		1,541,448		26,100		9,760,226
Executive Officer	2021	1,100,000		—		6,354,730		2,110,300		317,650		9,882,680
John M. Thomas, III	2023	$	835,380	$	—	$	2,743,221	$	950,898	$	22,875	$	4,552,374
Executive Vice President and	2022	795,600		—		2,627,456		57,928		21,750		3,502,734
Chief Financial and Strategy Officer	2021	710,711		—		2,423,003		767,504		21,375		3,922,593
Donald A. Moul	2023	$	795,600	$	—	$	2,271,265	$	332,840	$	237,632	$	3,637,337
Executive Vice President	2022	765,000		—		1,742,662		139,756		945,452		3,592,870
and Chief Operating Officer	2021	205,962		—		648,869		—		678,098		1,532,929
Timothy S. Rausch	2023	$	637,640	$	—	$	1,817,165	$	322,682	$	27,450	$	2,804,937
Executive Vice President	2022	569,321		—		1,607,805		219,325		26,100		2,422,551
and Chief Nuclear Officer	2021	551,668		—		1,387,136		237,895		25,650		2,202,349
David B. Fountain	2023	$	629,802	$	—	$	1,630,441	$	221,672	$	27,450	$	2,509,365
Executive Vice President	2022	577,800		—		1,239,436		185,739		76,100		2,079,075
and General Counsel	2021	507,444		—		567,163		4,167		479,295		1,558,069

Notes

(1) There were no bonus awards in 2023.

(2) The 2023 data is outlined in the Non-Equity Incentive Plan Compensation table below.

(3) The 2023 data is outlined in the Change in Pension Value and Nonqualified Deferred Compensation Earnings table below.

(4) The 2023 data is outlined in the All Other Compensation table below.

NON-EQUITY INCENTIVE PLAN COMPENSATION


	Jeffrey J. Lyash		John M. Thomas, III		Donald A. Moul		Timothy S. Rausch		David B. Fountain
EAIP	$	1,302,384	$	788,181	$	750,649	$	807,165	$	519,941
LTP	3,963,176		1,413,040		800,700		680,000		765,000
LTR 2021-03(A)	416,300		147,000		196,250		110,000		105,500
LTR 2022-02(B)	508,000		195,000		262,000		110,000		110,000
LTR 2023-01(C)	569,000		200,000		261,666		110,000		130,000

Total	$	6,758,860	$	2,743,221	$	2,271,265	$	1,817,165	$	1,630,441

Notes

(A) LTR grant representing the third tranche of the LTR award effective October 1, 2020.

(B) LTR grant representing the second tranche of the LTR award effective October 1, 2021.

207

Table of Contents

CHANGE IN PENSION VALUE AND NONQUALIFIED DEFERRED COMPENSATION EARNINGS


	Jeffrey J. Lyash		John M. Thomas, III		Donald A. Moul		Timothy S. Rausch		David B. Fountain
Increase under TVARS Plans(A)	$	—	$	18,114	$	—	$	—	$	—
Increase under SERP	2,530,772		932,784		332,840		322,682		221,672
Total	$	2,530,772	$	950,898	$	332,840	$	322,682	$	221,672

Notes

(A) The present value of the TVARS Plans and SERP are impacted by plan assumption changes and actual plan experience which may be different than previously assumed.

ALL OTHER COMPENSATION


	Jeffrey J. Lyash		John M. Thomas, III		Donald A. Moul			Timothy S. Rausch		David B. Fountain
401(k) Matching Contribution	$	13,725	$	13,725	$	13,725		$	13,725	$	13,725
Non-Elective 401(k) Contribution	13,725		9,150		13,725			13,725		13,725
Deferred Cash Recruitment/Relocation Incentive	—		—		100,000		(A)	—		—
Relocation Benefits	—		—		110,182			—		—
Total	$	27,450	$	22,875	$	237,632		$	27,450	$	27,450

Notes

(A) Mr. Moul is required to repay to TVA deferred cash recruitment and relocation incentive payment in the amount of $450,000 if, prior to June 21, 2024, he (1) voluntarily terminates employment unless the separation is for reasons beyond his control and acceptable to TVA, or (2) is terminated for cause. Mr. Moul is required to repay to TVA deferred cash recruitment and relocation incentive payment in the amount of $100,000 if, prior to June 21, 2025, he (1) voluntarily terminates employment unless the separation is for reasons beyond his control and acceptable to TVA, or (2) is terminated for cause.

The following table provides information on non-equity incentive plan opportunities and grants provided to NEOs and the possible range of payouts associated with the opportunities and grants. Awards under the EAIP, LTP, and LTR that vested as of September 30, 2023, will be paid in cash during the first quarter of 2024.

208

Table of Contents

GRANTS OF PLAN-BASED AWARDS TABLE

as of September 30, 2023


			Estimated Possible Payouts Under Non-Equity Incentive Plan Awards(1)						Estimated Possible Future Payouts Under Non-Equity Incentive Plan Awards(1)
			Current Year						Future Years						Performance
Name	Plan		Threshold(2)		Target(2)		Maximum(2)		Threshold(2)		Target(2)		Maximum(2)		Period End / Vesting Date
Jeffrey J. Lyash	EAIP	(3)	$	920,250	$	1,840,500	$	3,681,000							9/30/2023
	LTP 2021	(4)	1,457,050		2,914,100		5,828,200								9/30/2023
	LTR 2021-03	(5)			416,300		416,300								9/30/2023
	LTR 2022-02	(5)			508,000		508,000								9/30/2023
	LTR 2023-01	(5)			569,000		569,000								9/30/2023
	LTP 2022	(6)							$	1,778,000	$	3,556,000	$	7,112,000	9/30/2024
	LTR 2022-03	(5)									508,000		508,000		9/30/2024
	LTR 2023-02	(5)									569,000		569,000		9/30/2024
	LTP 2023	(6)							1,991,500		3,983,000		7,966,000		9/30/2025
	LTR 2023-03	(5)									569,000		569,000		9/30/2025

John M. Thomas, III	EAIP	(3)	$	334,152	$	668,304	$	1,336,608							9/30/2023
	LTP 2021	(4)	519,500		1,039,000		2,078,000								9/30/2023
	LTR 2021-03	(5)			147,000		147,000								9/30/2023
	LTR 2022-02	(5)			195,000		195,000								9/30/2023
	LTR 2023-01	(5)			200,000		200,000								9/30/2023
	LTP 2022	(6)							$	697,500	$	1,395,000	$	2,790,000	9/30/2024
	LTR 2022-03	(5)									195,000		195,000		9/30/2024
	LTR 2023-02	(5)									200,000		200,000		9/30/2024
	LTP 2023	(6)							712,500		1,425,000		2,850,000		9/30/2025
	LTR 2023-03	(5)									200,000		200,000		9/30/2025


Donald A. Moul	EAIP	(3)	$	318,240	$	636,480	$	1,272,960							9/30/2023
	LTP 2021	(4)(7)	294,375		588,750		1,177,500								9/30/2023
	LTR 2021-03	(5)(8)			196,250		196,250								9/30/2023
	LTR 2022-02	(5)			262,000		262,000								9/30/2023
	LTR 2023-01	(5)			261,666		261,666								9/30/2023
	LTP 2022	(6)							$	587,500	$	1,175,000	$	2,350,000	9/30/2024
	LTR 2022-03	(5)									262,000		262,000		9/30/2024
	LTR 2023-02	(5)									261,667		261,667		9/30/2024
	LTP 2023	(6)							712,500		1,425,000		2,850,000		9/30/2025
	LTR 2023-03	(5)									261,667		261,667		9/30/2025


Timothy S. Rausch	EAIP	(3)	$	223,174	$	446,348	$	892,696							9/30/2023
	LTP 2021	(4)	250,000		500,000		1,000,000								9/30/2023
	LTR 2021-03	(5)			110,000		110,000								9/30/2023
	LTR 2022-02	(5)			110,000		110,000								9/30/2023
	LTR 2023-01	(5)			110,000		110,000								9/30/2023
	LTP 2022	(6)							$	298,000	$	596,000	$	1,192,000	9/30/2024
	LTR 2022-03	(5)									110,000		110,000		9/30/2024
	LTR 2023-02	(5)									110,000		110,000		9/30/2024
	LTP 2023	(6)							362,500		725,000		1,450,000		9/30/2025
	LTR 2023-03	(5)									110,000		110,000		9/30/2025


David B. Fountain	EAIP	(3)	$	220,431	$	440,861	$	881,722							9/30/2023
	LTP 2021	(4)	281,250		562,500		1,125,000								9/30/2023
	LTR 2021-03	(5)			105,500		105,500								9/30/2023
	LTR 2022-02	(5)			110,000		110,000								9/30/2023
	LTR 2023-01	(5)			130,000		130,000								9/30/2023
	LTP 2022	(6)							$	385,000	$	770,000	$	1,540,000	9/30/2024
	LTR 2022-03	(5)									110,000		110,000		9/30/2024
	LTR 2023-02	(5)									130,000		130,000		9/30/2024
	LTP 2023	(6)							485,000		970,000		1,940,000		9/30/2025
	LTR 2023-03	(5)									130,000		130,000		9/30/2025

209

Table of Contents

Notes

(1) TVA does not have any equity securities and therefore has no equity-based awards.

(2) Threshold, Target, and Maximum represent amounts that could be earned by an NEO based on performance during the applicable performance cycle. Threshold, Target, and Maximum targets for EAIP and LTIP were 50 percent, 100 percent, and 200 percent for 2023.

(3) Target incentive opportunities as a percentage of salaries were as follows: Mr. Lyash, 150 percent; Mr. Thomas, 80 percent; Mr. Moul, 80 percent; Mr. Rausch, 70 percent; and Mr. Fountain, 70 percent. Additionally, a corporate multiplier ranging between 0.00 and 1.10 may be applied which can reduce the award to $0. An individual performance multiplier of up to 150 percent may also be applied which may increase the award to 225 percent of target. Actual EAIP awards earned for performance in 2023 are reported for each of the NEOs under the "Non-Equity Incentive Plan Compensation" column in the Summary Compensation Table.

(4) At the end of the performance period, TVA's LTIP Scorecard was applied to the grants in order to determine LTP award payouts. For 2023, the TVA Board subsequently exercised its discretion to adjust the calculated LTP payout percentage from 146 percent to 136 percent. Award payouts are reported for each of the NEOs under the "Non-Equity Incentive Plan Compensation" column in the Summary Compensation Table.

(5) All LTR awards will be paid in a lump sum within two months of the September 30th vesting date except in the case of death or disability. The awards will be paid in cash after deducting applicable federal, state, and local withholding taxes. In the case of death, the beneficiary will be paid as soon as administratively practicable but in no event later than the last day of the second full calendar month following the participant's death. Disability awards will be paid as soon as administratively practicable but in no event later than the last day of the second full calendar month following the participant's separation from service due to disability. Actual LTR awards earned in 2023 are reported for each of the NEOs under the "Non-Equity Incentive Plan Compensation" column in the Summary Compensation Table.

(6) At the end of the performance period, TVA's LTIP Scorecard will be applied to the grants in order to determine LTP award payouts. The final award may be adjusted by the TVA Board based on the evaluation of the participant's individual achievements, peer group comparisons, and performance results over the performance cycle.

(7) Reflects 27/36th of the target grant amount of $785,000 for the 2021-2023 LTP performance cycle.

(8) Reflects prorated amount of 27/36th of the LTR grant of $785,000 for the 2021-2023 retention cycle.

210

Table of Contents

Retirement and Pension Plans

The table below provides the actuarial present value of the NEOs' accumulated benefits, including the number of years of credited service, under TVA's retirement and pension plans as of September 30, 2023, determined using a methodology and interest rate and mortality rate assumptions consistent with those used in the financial statements in this Annual Report, set forth in Note 20 — Benefit Plans.

PENSION BENEFITS TABLE


Name	Plan Name	Number of Years of Credited Service(1)		Present Value of Accumulated Benefit			Payments During Last Year
Jeffrey J. Lyash	TVARS	N/A		N/A		(3)	$	—
	SERP Tier 1	14.417	(2)	$	14,425,040		—
John M. Thomas, III	TVARS	17.833		409,548			—
	SERP Tier 1	17.833		6,413,590			—
Donald A. Moul	TVARS	N/A		N/A		(3)	—
	SERP Tier 1	2.250		472,596			—
Timothy S. Rausch	TVARS	N/A		N/A		(3)	—
	SERP Tier 1	4.917		959,114			—
David B. Fountain	TVARS	N/A		N/A		(3)	—
	SERP Tier 1	3.333		411,578			—

Notes

(1) Limited to 24 years when determining supplemental benefits available under SERP Tier 1, described below.

(2) Mr. Lyash was granted five years of credited service for calculating his SERP benefit. In the event of involuntary termination except for cause prior to five years of actual service, the vesting requirement will be waived, and he will be entitled to the additional five years of granted credited service plus his actual years of service for calculating his SERP benefit. In the event of termination for cause or voluntary termination for any reason prior to five years of actual service, the vesting requirement will be waived and his SERP benefit will be calculated based on a total of five years of credited service. After five years of actual service with TVA, he will be granted five additional years of credited service for a total of 15 years of credited service for calculating his SERP benefit. As of September 30, 2023, Mr. Lyash had 4.417 years of service. The present value of the accumulated SERP benefit with 9.417 years of credited services is $9,828,493. The present value of the accumulated SERP benefit with 14.417 years of credited service is $14,425,040.

(3) Mr. Lyash, Mr. Rausch, Mr. Fountain, and Mr. Moul are not eligible to participate in the TVARS Pension Plan since they were hired after June 30, 2014.

Qualified Retirement Plans

The retirement benefits for which employees are eligible and receive under the TVARS pension plan and 401(k) plan depend on the employee's hire date, years of service, and individual elections, as follows:

•Employees who were first hired prior to January 1, 1996, receive (i) a traditional pension benefit calculated based on the employee's creditable service, the employee's average monthly salary for the highest three consecutive years of eligible compensation, and a pension factor based on the employee's age and years of service, less a Social Security offset, and (ii) 401(k) plan matching contributions from TVA. The 401(k) plan matching contribution is $0.25 on every dollar contributed by the employee up to six percent of eligible compensation, for a maximum matching contribution of 1.5 percent of eligible compensation. None of the NEOs are in this group.

•Employees who were first hired prior to January 1, 1996, and who elected to switch pension structures from traditional to cash balance, receive (i) a cash balance pension benefit calculated based on (a) pay-based credits and interest that accrue over time in the employee's account and (b) the employee's age at the time of retirement, and (ii) 401(k) plan matching contributions from TVA. The monthly pay credits are equal to six percent of eligible compensation, and monthly interest is credited at an annual interest rate equal to the change in the CPI-U plus three percent (with a minimum of six percent and maximum of 10 percent). The interest rate during 2023 was ten percent. The 401(k) plan matching contribution is $0.75 on every dollar contributed by the employee up to six percent of eligible compensation, for a maximum matching contribution of 4.5 percent of eligible compensation. None of the NEOs are in this group.

•Employees who were first hired on or after January 1, 1996, and who had 10 or more years of service as of October 1, 2016, receive (i) a cash balance pension benefit calculated based on (a) pay-based credits and interest that accrue over time in the employee's account and (b) the employee's age at the time of retirement, and (ii) 401(k) plan non-elective and matching contributions from TVA. The monthly pay credits are equal to three percent of eligible compensation, and monthly interest is credited at an annual interest rate equal to the change in the CPI-U plus two percent (with a minimum of 4.75 percent and a maximum of 6.25 percent). The interest rate during 2023 was 6.25 percent. The 401(k) plan automatic, non-elective contribution is equal to three percent of eligible compensation, and the matching contribution is $0.75 on every dollar contributed by the employee up to six percent of eligible compensation, for a maximum matching contribution of 4.5 percent of eligible compensation. Mr. Thomas is in this group.

211

Table of Contents

•Employees who were first hired on or after January 1, 1996, and who had less than 10 years of service as of October 1, 2016, receive (i) a cash balance pension benefit calculated based on pay-based credits and interest that accrue over time in the employee's account and the employee's age at the time of retirement, and (ii) 401(k) plan non-elective and matching contributions from TVA. As of October 1, 2016, the cash balance accounts of these employees receive no additional pay-based credits; however, the accounts continue to receive monthly interest credits at an annual interest rate equal to the change in the CPI-U plus two percent (with a minimum of 4.75 percent and a maximum of 6.25 percent). The interest rate during 2023 was 6.25 percent. The 401(k) plan automatic, non-elective contribution is equal to six percent of eligible compensation, and the matching contribution is dollar-for-dollar on employee contributions up to six percent of eligible compensation, for a maximum matching contribution of six percent of eligible compensation. None of the NEOs are in this group.

•Employees who were hired prior to July 1, 2014, and who elected to waive their cash balance retirement benefit and transfer their cash balance account to the 401(k) plan effective October 1, 2018, receive a retirement benefit in the 401(k) plan only. The 401(k) plan is an automatic, non-elective contribution that is equal to six percent of eligible compensation, and the matching contribution is dollar-for-dollar on employee contributions up to six percent of the eligible compensation, for a maximum matching contribution of six percent of eligible compensation. None of the NEOs are in this group.

•Employees who were first hired on or after July 1, 2014 (or who were rehired and were either previously not vested in the pension plan or cashed out their pension benefit) receive a retirement benefit in the 401(k) plan only. The 401(k) plan automatic, non-elective contribution is equal to 4.5 percent of eligible compensation, and the matching contribution is $0.75 on every dollar contributed by the employee up to six percent of eligible compensation, for a maximum matching contribution of 4.5 percent of eligible compensation. Mr. Lyash, Mr. Moul, Mr. Rausch, and Mr. Fountain are in this group.

Cash Balance Pension. For NEOs who are eligible for retirement benefits under the pension plan, which includes Mr. Thomas, eligible compensation is defined as annual salary only for benefit calculation purposes and is shown under the column titled "Salary" in the Summary Compensation Table. The eligible compensation in 2023 could not exceed $305,000 pursuant to the IRS annual compensation limit applicable to qualified plans. Employees with cash balance benefits who have at least five years of cash balance service are eligible at retirement or termination of employment to receive an immediate benefit in the form of a monthly pension with survivor benefit options or in a lump-sum payment with cash out or rollover options. The pension plan does not provide for early retirement benefits to any NEO or any other employee eligible for cash balance benefits.

401(k) Plan. All employees eligible to participate in the 401(k) plan, including the NEOs, may elect to contribute to the 401(k) plan on a before-tax, Roth, and/or after-tax basis, and in-plan Roth rollovers by participant election are available. Contributions to a participant's 401(k) plan account by TVA and the participant during 2023 could not exceed $66,000 pursuant to the IRS annual contribution limit applicable to qualified plans. For purposes of matching and non-elective contributions from TVA to the 401(k) accounts of the NEOs, eligible compensation is defined as annual salary only for benefit calculation purposes and is shown under the column titled "Salary" in the Summary Compensation Table. The eligible compensation in 2023 could not exceed $305,000 pursuant to the IRS annual compensation limit applicable to qualified plans. Any participant in the 401(k) plan must have three years of TVA service to be vested in matching and non-elective contributions from TVA.

Supplemental Executive Retirement Plan

All NEOs are participants in the SERP. The SERP is a non-qualified defined benefit pension plan similar to those typically found in other companies in TVA's peer group and is provided to a limited number of executives, including the NEOs. TVA's SERP was created to recruit and retain key executives. The plan is designed to provide a competitive level of retirement benefits in excess of the limitations on contributions and benefits imposed by TVA's qualified defined benefit plan and Internal Revenue Code Section 415 limits on qualified retirement plans.

The SERP provides two distinct levels of participation, Tier 1 and Tier 2. Each participant is assigned to one of the two tiers at the time he or she is approved to participate in the SERP. The level of participation ("Tier") defines the level of retirement benefits under the SERP at the time of retirement.

Under the SERP, normal retirement eligibility is age 62 with five years of vesting service. No vested and accrued benefits are payable prior to age 55, and benefits are reduced for retirements prior to age 62. The level of reduction in benefits for retirements prior to age 62 depends on whether a participant's termination is "approved" or "unapproved." In the event of an approved termination of TVA employment, any vested and accrued benefits are reduced by 5/12 percent for each month that the date of benefit commencement precedes the participant's 62nd birthday, up to a maximum reduction of 35 percent. In the event of an unapproved termination of TVA employment, the participant's accrued benefits are first subject to a reduced percentage of vesting if the participant's years of service are between five and 10. At five years of vesting service, the vested percentage of retirement benefits is 50 percent and increases thereafter by 10 percent for each full additional year of service, reaching 100 percent vesting for 10 or more years of vesting service. Thereafter, any vested and accrued benefits are reduced by 10/12 percent for each month that the date of benefit commencement precedes the participant's 62nd birthday up to a maximum reduction of 70 percent.

212

Table of Contents

For purposes of the SERP, an "approved" termination means termination of employment with TVA due to (i) retirement on or after the participant's 62nd birthday, (ii) retirement on or after attainment of actual age 55, if such retirement has the approval of the TVA Board or its delegate, (iii) death in service as an employee, (iv) disability (as defined under the Rules and Regulations of the TVARS) as determined by the Retirement Committee, or (v) any other circumstance approved by the TVA Board or its delegate. For purposes of the SERP, an "unapproved" termination means a termination of employment with TVA when such termination does not constitute an "approved" termination as defined in the preceding sentence.

SERP Tier 1. The Tier 1 structure is designed to replace 60 percent of the amount of a participant's compensation at the time the participant reaches age 62 and has accrued 24 years of TVA service. Tier 1 benefits are based on a participant's highest average compensation during three consecutive SERP years and a pension multiple of 2.5 percent for each year of credited service up to a maximum of 24 years. Compensation is defined as salary and EAIP for benefit calculation purposes. Tier 1 benefits are offset by Social Security benefits, benefits provided under TVA's qualified defined benefit pension plan, and prior employer pension benefits when applicable.

SERP Tier 2. The purpose of this restoration plan is to adjust qualified plan benefits to executives when benefits are lost due to IRS limits. Pension benefits are based on a participant's average compensation over three consecutive fiscal years and a pension multiplier of 1.3 percent for each year of service. For benefit calculation, pension includes salary and annual incentives.

Nonqualified Deferred Compensation

The following table provides information regarding deferred contributions, earnings, and balances for each of the NEOs. The amounts reported under this table do not represent compensation in addition to the compensation that was earned in 2023 and already reported in the Summary Compensation Table, but rather the amounts of compensation earned by the NEOs in 2023 or prior years that were or have been deferred.

NONQUALIFIED DEFERRED COMPENSATION TABLE(1)

Name

Executive
Contributions

Registrant
Contributions

Aggregate
Earnings

Aggregate
Withdrawals/
Distributions

Aggregate
Balance at
September 30, 2023

Jeffrey J. Lyash

—

John M. Thomas, III

—

Donald A. Moul

—

Timothy S. Rausch

—

David B. Fountain

—

Note

(1) None of TVA's NEOs had activity or an outstanding balance in their nonqualified deferred compensation plans as of September 30, 2023.

TVA's compensation plans may allow participants to defer all or a portion of compensation earned under the plans as defined by plan terms and IRS regulations. All deferrals are credited to each participant in a deferred compensation account, and the deferral amounts are then funded into a rabbi trust. Each participant may elect one or more investment options made available by TVA or allow some or all funds to accrue interest at the rate established by the beginning of each fiscal year equal to the composite rate of all Treasury issues. Participants may elect to change from either one notional investment option or the TVA interest bearing option to another at any time. Generally, upon termination of employment, funds are distributed pursuant to elections made in accordance with applicable IRS regulations.

213

Table of Contents

Executive Severance Plan

TVA established the TVA Executive Severance Plan (the “Severance Plan”), including the eligibility of TVA’s NEOs (other than the CEO) to participate in the Severance Plan. The TVA Board also approves the CEO’s participation in the Severance Plan as part of the overall market review of CEO compensation. The Severance Plan provides that if TVA terminates an NEO’s employment other than for Gross Misconduct (as defined below) or such participant terminates employment for Good Reason (as defined below), such participant will be eligible to receive the following benefits in addition to his or her accrued compensation:

•A lump sum severance payment equal to the applicable multiplier times the sum of the employee’s annual base salary and target annual incentive, and continued healthcare benefits for a number of complete or partial years equal to such multiplier. The applicable multiplier is 1.5 for the CEO and 1.0 for the other NEOs, or, if the qualifying separation occurs within 24 months following a Change in Control ("CIC") of TVA (as defined below), then the applicable multiplier is 3.0 for the CEO and 2.0 for the other NEOs.

•Any earned but unpaid incentive payments, and a prorated annual incentive payment for the year of termination based on actual (or, if the qualifying separation occurs within 24 months following a CIC of TVA, based on target) achievement of performance goals.

•If the qualifying separation occurs within 24 months following a CIC of TVA, then a lump sum cash payment equal to the sum of (a) any LTIP performance awards the performance cycle of which is in progress on the participant's separation date, non-prorated and calculated based on target achievement of performance goals, and (b) any LTIP retention awards the retention cycle of which is in progress on the participant's separation date, non-prorated and calculated as if all such awards are fully vested.

•If the qualifying separation occurs within 24 months following a CIC of TVA, a waiver of the five-year vesting requirement set forth in Section 4.1(a) of the TVA Supplemental Executive Retirement Plan pursuant to its terms.

For the avoidance of doubt, the occurrence of a CIC by itself does not entitle participants to benefits under the Executive Severance Plan; rather, a qualifying separation must also occur within 24 months following a CIC as discussed above in order for a participant to be entitled to CIC benefits.

In order to receive severance benefits under the Severance Plan, participants must timely execute (and not revoke) a release of claims in favor of TVA and comply with all applicable post-separation restrictive covenants. The terms of the Severance Plan will supersede rights and obligations with respect to severance under existing agreements to which Severance Plan participants are a party.

Under the Severance Plan, a CIC shall be deemed to have occurred on the earliest of the following dates:

•the date when the United States ceases to have an ownership interest of at least fifty percent (50%) of TVA;

•the date one or more entities acquire (or have acquired during the 12-month period ending on the date of the most recent acquisition by such entity or entities) assets from TVA that have a total gross fair market value (without regard to any debt) equal to or more than thirty percent (30%) of the total gross fair market value of all of the assets of TVA immediately before such most recent acquisition;

•the date that a majority of the members of the TVA Board is no longer appointed and confirmed in accordance with the provisions of Section 2(a)(1) of the TVA Act;

•the date a complete liquidation or winding-up of TVA is consummated;

•the date that an entity such as an organization, board, commission, authority, department, or agency succeeds to the principal functions of, or powers and duties granted to, TVA; or

•the date of enactment or effectiveness of any applicable law, statute, rule, regulation, order, decree, ruling, or writ of a governmental or regulatory agency, entity, or official of competent jurisdiction that materially limits the TVA Board’s authority to establish or renew a participant’s total direct compensation.

Under the Severance Plan, Good Reason shall mean the occurrence of any of the following:

•a material adverse change in the participant’s authority, duties, or responsibilities (excluding during any period of participant’s physical or mental incapacity) with respect to his or her employment with TVA without the participant’s prior written consent;

214

Table of Contents

•a material reduction in the participant’s base salary without the participant’s prior written consent (other than any reduction applicable to management employees generally);

•an actual change in the participant’s principal work location by more than 50 miles and more than 50 miles from the participant’s principal place of abode as of the date of such change in job location without the participant’s prior written consent; or

•a material breach by TVA of any term or provision of the Severance Plan without the participant’s prior written consent.

A participant may be considered to have Good Reason to terminate employment for purposes of the Severance Plan only if the participant provides written notice to TVA of termination within 30 days of the occurrence of the applicable event(s) or, if later, within 30 days of the date the participant has knowledge that such event(s) occurred. An event constituting Good Reason shall no longer constitute Good Reason if the circumstances described in the Good Reason notice are cured by TVA within 30 days following receipt of the Good Reason notice.

Under the Severance Plan, Gross Misconduct shall mean any of the following:

•misconduct involving dishonesty, fraud, or gross negligence that directly results in significant economic or reputational harm to TVA;

•insubordination, intentional neglect of duties, or refusal to cooperate with investigations of TVA’s business practices;

•conviction of a crime amounting to a felony under the laws of the United States or any of the several states, or a crime of moral turpitude;

•a significant violation of TVA’s Code of Ethics or Code of Conduct; or

•disclosure without authorization of proprietary or confidential information of TVA.

215

Table of Contents

Potential Payments on Account of Resignation, Retirement, Termination without Cause, Termination with Cause, Death, or Disability

The tables below show certain potential payments that would have been made to each NEO if his or her employment had been terminated on September 30, 2023, under various scenarios: retirement, resignation, resignation for Good Reason (with and without CIC), termination without Cause (with or without CIC), termination with Cause, death, and Disability. The tables below also include payments from the following sources: severance agreement, SERP, EAIP, deferred cash recruitment/relocation incentive, LTR, LTP, and deferred compensation.

The following provides background information on certain payments included in the termination tables:

•Resignation. The Resignation column covers resignations that do not qualify as resignations for Good Reason under TVA's Severance Plan. See Executive Compensation Tables and Narrative Disclosures - Executive Severance Plan for a definition of Good Reason.

•Retirement. The Retirement column covers situations where an employee separates from service after having met one of the following criteria: (i) the employee has reached the age of 55 with at least 10 years of full-time TVA service, (ii) the employee has reached the age of 60 with at least five years of full-time TVA service, or (iii) the employee is in the Civil Service Retirement System or Federal Employees Retirement System and is eligible for an immediate retirement benefit upon termination as outlined in the applicable plan.

•Severance Agreement and Termination without Cause or Resignation for Good Reason (CIC). The Severance Plan provides that if TVA terminates an NEO's employment other than for Gross Misconduct or such participant terminates employment for Good Reason, such participant will be eligible to receive certain benefits in addition to his or her accrued compensation. The amount of additional benefits will vary depending on whether the qualifying separation from service occurs within 24 months following a CIC. See Executive Compensation Tables and Narrative Disclosures - Executive Severance Plan for definitions of Gross Misconduct, Good Reason, and CIC and for a discussion of the benefits provided to NEOs under the Severance Plan.

•SERP. The SERP payments in the tables represent the present value of the accumulated benefit unless otherwise noted.

•SERP Payment Following Change in Control. The Severance Plan provides that the five-year vesting requirement set forth in Section 4.1(a) of the SERP will be waived pursuant to the terms of such section with respect to each participant whose termination date occurs within 24 months following a CIC.

•SERP Payment in Event of Death. In the event of a participant’s death while employed by TVA, the participant’s beneficiary will receive a lump sum payment equal to the actuarial equivalent of the benefit that would have been paid had the participant terminated employment on the date of death and elected a joint and 50 percent survivor benefit. The beneficiary will receive 50 percent of the reported value.

•LTR Payment in Event of Retirement. The LTIP provides that if a participant retires, the participant is entitled to any portion of a LTR award that had vested at the time of the separation from service but not been paid as well as a prorated portion of any LTR grant that had not vested at the time of the participant's separation from service, provided the amount of any such LTR award for each vesting period within the retention cycle is prorated based on the number of whole months the participant was employed by TVA during such vesting period.

•LTR Payment in Event of Death. The LTIP provides that in the event of the death of a participant, the participant's beneficiary is entitled to any portion of a LTR award that had vested at the time of the participant's death but not been paid as well as a prorated portion of any LTR grant that had not vested at the time of the participant's separation from service, provided that the LTR award for each vesting period will be prorated based on the number of whole months the participant was employed by TVA during the vesting period in which the participant separated from service as compared to (1) 12 months for the vesting period that includes the day that the participant separated from service, (2) 24 months for the vesting period that immediately follows the vesting period during which the participant separated from service, and (3) 36 months for the second vesting period that follows the vesting period during which the participant separated from service.

•LTR Payment in Event of Disability. The LTIP provides that if a participant separates from service due to a disability, the participant is entitled to any portion of a LTR award that had vested at the time of the separation from service but not been paid as well as a prorated portion of any LTR grant that had not vested at the time of the participant's separation from service, provided that the LTR award will be prorated based on the number of whole months the participant was employed by TVA during the vesting period in which the participant separated from service as compared to (1) 12 months for the vesting period that includes the day that the participant separated from service, (2) 24 months for the vesting period that immediately follows the vesting period during which the participant separated from service, and (3) 36 months for the second vesting period that follows the vesting period during which the participant separated from service.

216

Table of Contents

•LTP Payment in the Event of Retirement. The LTIP provides that if a participant retires, the participant is entitled to (1) any LTP award that had vested at the time of the participant's separation from service but not been paid and (2) a prorated portion of any LTP awards that had not vested at the time of the participant's separation from service, provided that the amount of any such LTP award (a) is calculated using the actual percent of opportunity achieved and (b) is prorated based on the number of whole months the participant is employed by TVA during the applicable performance cycle. John Thomas is the only NEO who was eligible to retire as of September 30, 2023, and the LTP amounts included in the Retirement column for Mr. Thomas assume that the percent of opportunity achieved will be 100 percent of target for the performance cycles ending on September 30, 2024 and September 30, 2025.

•LTP Payment in Event of Death. The LTIP provides that in the event of the death of a participant, the participant's beneficiary is entitled to (1) any LTP award that had vested at the time of the participant's death but not been paid and (2) any LTP awards that had not vested at the time of the participant's death and that covered a performance cycle for which the participant had received a LTP grant, provided that the amount of any such LTP award (a) will be calculated assuming that the percent of opportunity achieved is 100 percent of target and (b) will be prorated based on the number of whole months the participant was participating in the plan during the applicable performance cycle.

•LTP Payment in Event of Disability. The LTIP provides that if a participant separates from service due to a disability, the participant is entitled to (1) any LTP award that had vested at the time of the participant's separation from service but not been paid and (2) any LTP awards that had not vested at the time of the participant's separation from service and that covered a performance cycle for which the participant had received a LTP grant, provided that the amount of any such LTP award (a) will be calculated assuming that the percent of opportunity achieved is 100 percent of target and (b) will be prorated based on the number of whole months the participant was employed by TVA during the applicable performance cycle.

In addition to the amounts set forth in the termination tables, all NEOs would also be entitled to payments from plans generally available to TVA employees under the specific circumstances of termination of employment, including the health and welfare and pension plans and amounts in the 401(k) plan.


Jeffrey J. Lyash	Resignation		Retirement			Termination without Cause or Resignation for Good Reason (Non-CIC)		Termination without Cause or Resignation for Good Reason (CIC)		Termination with Cause		Death/Disability
Severance Agreement	$	—	$	—		$	4,601,250	$	9,202,500	$	—	$	—
SERP(1)	5,067,626		5,067,626			9,828,493		9,828,493		5,067,626		9,828,493
EAIP	1,302,384		1,302,384			1,302,384		1,302,384		1,302,384		1,302,384
Deferred Cash Recruitment/Relocation Incentive	—		—			—		—		—		—
LTR	1,493,300		1,493,300			1,493,300		3,139,300		1,493,300		2,221,467
LTP	3,963,176		3,963,176		(2)	3,963,176		11,502,176		3,963,176		7,661,510
Deferred Compensation	—		—			—		—				—
Total Value of Potential Payments	$	11,826,486	$	11,826,486		$	21,188,603	$	34,974,853	$	11,826,486	$	21,013,854

Notes

(1) In February 2019, TVA entered into an arrangement with Mr. Lyash that provides that at the commencement of his employment with TVA, he will be granted five years of credited service for calculating his SERP benefit. In the event of involuntary termination except for cause prior to five years of actual service, the vesting requirement will be waived, and he will be entitled to the additional five years of granted credited service plus his actual years of service for calculating his SERP benefit. In the event of termination for cause or voluntary termination for any reason prior to five years of actual service, the vesting requirement will be waived and his SERP benefit will be calculated based on a total of five years of credited service.

(2) Is not eligible to retire based on definition in the LTIP.

217

Table of Contents


John M. Thomas, III	Resignation		Retirement		Termination without Cause or Resignation for Good Reason (Non-CIC)		Termination without Cause or Resignation for Good Reason (CIC)		Termination with Cause		Death/Disability
Severance Agreement	$	—	$	—	$	1,503,684	$	3,007,368	$	—	$	—
SERP (1,2)	6,413,590		6,413,590		6,413,590		6,413,590		6,413,590		6,413,590
EAIP	788,181		788,181		788,181		788,181		788,181		788,181
Deferred Cash Recruitment/Relocation Incentive	—		—		—		—		—		—
LTR	542,000		542,000		542,000		1,137,000		542,000		806,167
LTP	1,413,040		2,818,040		2,818,040		4,233,040		1,413,040		2,818,040
Deferred Compensation	—		—		—		—		—		—
Total Value of Potential Payments	$	9,156,811	$	10,561,811	$	12,065,495	$	15,579,179	$	9,156,811	$	10,825,978

Notes

(1) Actual benefit would be paid in five annual installments beginning at age 55.

(2) Assumes that the TVA Board or its delegate determines that the termination is an approved termination under SERP. See Executive Compensation Tables and Narrative Disclosures — Retirement and Pension Plans — Supplemental Executive Retirement Plan above for a discussion of approved and unapproved terminations under SERP.


Donald A. Moul	Resignation			Retirement			Termination without Cause or Resignation for Good Reason (Non-CIC)			Termination without Cause or Resignation for Good Reason (CIC)		Termination with Cause			Death/Disability
Severance Agreement	$	—		$	—		$	1,432,080		$	2,864,160	$	—		$	—
SERP	—		(1)	—		(1)	—		(1)	472,596		—		(1)	472,596
EAIP	750,649			750,649			750,649			750,649		750,649			750,649
Deferred Cash Recruitment/Relocation Incentive (2)	—			—			—			—		—			—
LTR	719,916			719,916			719,916			1,505,250		719,916			1,068,972
LTP	800,700			800,700		(3)	800,700			3,400,700		800,700			2,059,033
Deferred Compensation	—			—			—			—		—			—
Total Value of Potential Payments	$	2,271,265		$	2,271,265		$	3,703,345		$	8,993,355	$	2,271,265		$	4,351,250

Notes

(1) The five-year vesting requirement has not been met.

2) Mr. Moul is required to repay to TVA deferred cash recruitment and relocation incentive payment in the amount of $450,000 if, prior to June 21, 2024, he (1) voluntarily terminates employment unless the separation is for reasons beyond his control and acceptable to TVA, or (2) is terminated for cause. Mr. Moul is required to repay to TVA deferred cash recruitment and relocation incentive payment in the amount of $100,000 if, prior to June 21, 2025, he (1) voluntarily terminates employment unless the separation is for reasons beyond his control and acceptable to TVA, or (2) is terminated for cause.

(3) Is not eligible to retire based on definition in the LTIP.

218

Table of Contents


Timothy S. Rausch	Resignation			Retirement			Termination without Cause or Resignation for Good Reason (Non-CIC)			Termination without Cause or Resignation for Good Reason (CIC)		Termination with Cause			Death/Disability
Severance Agreement	$	—		$	—		$	1,083,988		$	2,167,976	$	—		$	—
SERP	—		(1)	—		(1)	—		(1)	959,114		—		(1)	959,114
EAIP	807,165			807,165			807,165			807,165		807,165			807,165
Deferred Cash Recruitment/Relocation Incentive	—			—			—			—		—			—
LTR	330,000			330,000			330,000			660,000		330,000			476,667
LTP	680,000			680,000		(2)	680,000			2,001,000		680,000			1,319,000
Deferred Compensation	—			—			—			—		—			—
Total Value of Potential Payments	$	1,817,165		$	1,817,165		$	2,901,153		$	6,595,255	$	1,817,165		$	3,561,946

Notes

(1) The five-year vesting requirement has not been met.

(2) Is not eligible to retire based on definition in the LTIP.


David B. Fountain	Resignation			Retirement			Termination without Cause or Resignation for Good Reason (Non-CIC)			Termination without Cause or Resignation for Good Reason (CIC)		Termination with Cause			Death/Disability
Severance Agreement	$	—		$	—		$	1,070,663		$	2,141,327	$	—		$	—
SERP	—		(1)	—		(1)	—		(1)	411,578		—		(1)	411,578
EAIP	519,941			519,941			519,941			519,941		519,941			519,941
Deferred Cash Recruitment/Relocation Incentive	—			—			—			—		—			—
LTR	345,500			345,500			345,500			715,500		345,500			508,833
LTP	765,000			765,000		(2)	765,000			2,505,000		765,000			1,601,666
Deferred Compensation	—			—			—			—		—			—
Total Value of Potential Payments	$	1,630,441		$	1,630,441		$	2,701,104		$	6,293,346	$	1,630,441		$	3,042,018

Notes

(1) The five-year vesting requirement has not been met.

(2) Is not eligible to retire based on definition in the LTIP.

Other Agreements

Except as described above and in the Compensation Discussion and Analysis, there are no other agreements between TVA and any of the NEOs.

219

Table of Contents

Director Compensation

The TVA Act provides for up to nine directors on the TVA Board. As of November 13, 2023, the TVA Board consisted of nine members. Under the TVA Act, each director receives certain stipends that are increased annually by the same percentage increase applicable to adjustments under 5 U.S.C. § 5318, which adjusts the annual rates of pay of employees on the Executive Schedule of the U.S. Government. Effective January 1, 2023, the annual stipend for TVA directors was increased from $56,088 to $58,400 per year unless (1) the director chairs a TVA Board committee, in which case the stipend was increased from $57,197 to $59,500 per year, or (2) the director is the Chair of the TVA Board, in which case the stipend was increased from $62,418 to $65,000 per year. Directors are also reimbursed under federal law for travel, lodging, and related expenses while attending meetings and for other official TVA business.

The annual stipends provided by the TVA Act for each director and for the Chair of the TVA Board as of November 13, 2023, are listed below:

TVA BOARD ANNUAL STIPENDS


Name	Annual Stipend
Joe H. Ritch	$	65,000
Beth P. Geer	58,400
Beth H. Harwell	59,500
William B. Kilbride	58,400
Robert P. Klein	59,500
L. Michelle Moore	58,400
Brian E. Noland	59,500
William J. Renick	58,400
A. Wade White	58,400

The following table provides information on the compensation received by TVA's directors during 2023:

DIRECTOR COMPENSATION


Name	Fees Earned or Paid in Cash		Stock Awards		Option Awards		Non-Equity Incentive Plan Compensation		Change in Pension Value and Nonqualified Deferred Compensation Earnings(1)		All Other Compensation(2)		Total
Joe H. Ritch	$	43,023	$	—	$	—	$	—	$	—	$	2,151	$	45,174
Beth P. Geer	42,228		—		—		—		—		422		42,650
Beth H. Harwell	58,791		—		—		—		—		2,939		61,730
William B. Kilbride	64,206		—		—		—		—		3,210		67,416
Robert P. Klein	43,023		—		—		—		—		2,151		45,174
L. Michelle Moore	42,228		—		—		—		—		1,860		44,088
Brian E. Noland	58,791		—		—		—		—		2,939		61,730
William J. Renick	42,228		—		—		—		—		2,111		44,339
A. Wade White	42,228		—		—		—		—		2,111		44,339

Notes

(1) TVA directors do not participate in the TVARS Retirement Plans, TVA's SERP, or any non-qualified deferred compensation plan available to TVA employees. However, as appointed officers of the U.S. government, the directors are members of FERS. FERS is administered by the federal Office of Personnel Management, and information regarding the value of FERS pension benefits is not available to TVA.

(2) These amounts include TVA's non-elective and matching contributions to the Thrift Savings Plan.

The directors are not eligible to participate in any incentive programs available to TVA employees. The directors do not participate in the TVARS Retirement Plans and do not participate in TVA's SERP. However, as appointed officers of the U.S. government, the directors are members of the Federal Employees Retirement System ("FERS"). FERS is a tiered retirement plan that includes three components: (1) Social Security benefits, (2) the Basic Benefit Plan, and (3) the Thrift Savings Plan ("TSP"). As members of FERS, each director is required to make a mandatory percentage contribution of his or her stipend to the Basic Benefit Plan in the amount of 0.8 percent for those directors appointed prior to January 1, 2013, 3.1 percent for those

220

Table of Contents

directors appointed between January 1, 2013, and December 31, 2013, and 4.4 percent for those directors appointed on or after January 1, 2014.

The FERS Basic Benefit Plan is a qualified defined benefit plan that provides a retirement benefit based on a final average pay formula that includes age, highest average salary during any three consecutive years of service, and years of creditable service. A director must have at least five years of creditable service to be eligible to receive retirement benefits. Directors are eligible for immediate, unreduced retirement benefits once (1) they reach age 62 and have five years of FERS creditable service, (2) they reach age 60 and have 20 years of FERS creditable service, or (3) they attain the minimum retirement age and accumulate the specified years of service as set forth in the FERS regulations. Generally, benefits are calculated by multiplying 1.0 percent of the highest average salary during any three consecutive years of service by the number of years of creditable service. Directors who retire at age 62 or later with at least 20 years of FERS creditable service receive an enhanced benefit (a factor of 1.1 percent is used rather than 1.0 percent).

Each director is also eligible to participate in the TSP. The TSP is a tax-deferred retirement savings and investment plan that offers the same type of savings and tax benefits offered under 401(k) plans. Once a director becomes eligible, TVA contributes an amount equal to one percent of the director's stipend into a TSP account for the director. These contributions are made automatically every two weeks regardless of whether the director makes a contribution of his or her own money. Directors are eligible to contribute up to the TSP elective deferral limit. Directors receive matching contributions of 100 percent of each dollar for the first three percent of the director's stipend and 50 percent of each dollar for the next two percent of the director's stipend.

TVA offers a group of health and other benefits (medical, dental, vision, life and accidental death and disability insurance, and long-term disability insurance) that are available to a broad group of employees. Directors are eligible to participate in TVA's health benefit plans and other non-retirement benefit plans on the same terms and at the same contribution rates as other TVA employees.

Compensation Committee Interlocks and Insider Participation

The People and Governance Committee of the TVA Board currently consists of the following four directors: Brian E. Noland, Beth Harwell, Robert P. Klein, and Adam W. White.

No member of this Committee was at any time during 2023 or at any other time an officer or employee of TVA, and no member of this committee had any relationship with TVA requiring disclosure under Item 404 of Regulation S-K. No executive officer of TVA has served on the board of directors or compensation committee of any other entity that has or has had one or more executive officers who served as a member of the People and Governance Committee during 2023.

Compensation Committee Report

The People and Governance Committee has reviewed and discussed the Compensation Discussion and Analysis with management, and based on the review and discussions, the Committee recommended to the TVA Board that the Compensation Discussion and Analysis be included in this Annual Report.

PEOPLE AND GOVERNANCE COMMITTEE

Brian E. Noland, Chair

Beth Harwell

Robert P. Klein

Adam W. White

221

Table of Contents

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

Not applicable.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

Director Independence

The composition of the TVA Board is governed by the TVA Act. The TVA Act contains certain provisions that are similar to the considerations for independence under section 10A(m)(3) of the Exchange Act, including that to be eligible for appointment to the TVA Board, an individual shall not be an employee of TVA and shall make full disclosure to Congress of any investment or other financial interest that the individual holds in the energy industry.

Related Party Transactions

Conflict of Interest Provisions

All TVA employees, including directors and executive officers, are subject to the conflict of interest laws and regulations applicable to employees of the federal government. Accordingly, the general federal conflict of interest statute (18 U.S.C. § 208) and the Standards of Ethical Conduct for Employees of the Executive Branch (5 C.F.R. part 2635) ("Standards of Ethical Conduct") form the basis of TVA's policies and procedures for the review, approval, or ratification of related party transactions. The general federal conflict of interest statute, subject to certain exceptions, prohibits each government employee, including TVA's directors and executive officers, from participating personally and substantially (by advice, decision, or otherwise) as a government employee in any contract, controversy, proceeding, request for determination, or other particular matter in which, to his or her knowledge, he or she (or his or her spouse, minor child, general partner, organization with which he or she serves as officer, director, employee, trustee, or general partner, or any person or organization with which he or she is negotiating, or has an arrangement, for future employment) has a financial interest. Exceptions to the statutory prohibition relevant to TVA employees are (1) financial interests which have been deemed by the U.S. Office of Government Ethics, in published regulations, to be too remote or inconsequential to affect the integrity of the employee's services, or (2) interests which are determined in writing, after full disclosure and on a case-by-case basis, to be not so substantial as to be deemed likely to affect the integrity of the employee's services for TVA. In accordance with the statute, individual waiver determinations are made by the official responsible for the employee's appointment. In the case of TVA directors, the determination may be made by the Chair of the TVA Board, and in the case of the Chair of the TVA Board, the determination may be made by the Counsel to the President of the U.S.

More broadly, Subpart E of the Standards of Ethical Conduct provides that where an employee (1) knows that a particular matter involving specific parties is likely to have a direct and predictable effect on the financial interests of a member of his or her household, or that a person with whom the employee has a "covered relationship" (which includes, but is not limited to, persons with whom the employee has a close family relationship and organizations in which the employee is an active participant) is or represents a party to the matter, and (2) determines that the circumstances would cause a reasonable person with knowledge of relevant facts to question his or her impartiality in the matter, the employee should not participate in the matter absent agency authorization. This authorization may be given by the employee's supervising officer, as agency designee, in consultation with the TVA Designated Agency Ethics Official, upon the determination that TVA's interest in the employee's participation in the matter outweighs the concern that a reasonable person may question the integrity of TVA's programs and operations.

The previously described restrictions are reflected in TVA's policies which require employees, including directors and executive officers, to comply with the guidelines outlined in the Standards of Ethical Conduct and which restate the standard of the conflict of interest statute.

Additionally, the TVA Board approved a written conflict of interest policy that applies to all TVA employees, including TVA's directors and executive officers. The conflict of interest policy reaffirms the requirement that all TVA employees must comply with applicable federal conflict of interest laws, regulations, and policies. It also establishes an additional policy that is applicable to TVA's directors and CEO. This additional policy provides that TVA's directors and CEO shall not hold a financial interest in (1) any distributor of TVA power; (2) any entity engaged primarily in the wholesale or retail generation, transmission, or sale of electricity, except where substantially all such business is conducted outside of North America; or (3) any entity that may reasonably be perceived as likely to be adversely affected by the success of TVA as a producer or transmitter of electric power. Any waiver of this additional policy may be made only by the TVA Board and will be disclosed promptly to the public, subject to the limitations on disclosure imposed by law.

TVA also has a protocol titled the "Obtaining Things of Value from TVA Protocol" (the "Protocol"). The Protocol describes what a TVA employee should do if a person covered by the Protocol asks for assistance in obtaining a specified thing of value from TVA. Similarly, the TVA Board Practice on External Inquiries describes what a member of the TVA Board should do if a person covered by the practice asks for assistance in obtaining a specified thing of value from TVA.

222

Table of Contents

TVA relies on the policies, practices, laws, and regulations discussed above to regulate conflicts of interest involving employees, including directors and executive officers. TVA has no other written or unwritten policy for the approval or ratification of any transactions in which TVA was or is to be a participant and in which any director or executive officer of TVA (or any child, stepchild, parent, stepparent, spouse, sibling, mother-in-law, father-in-law, son-in-law, daughter-in-law, brother-in-law, or sister-in-law of any director or executive officer of TVA) had or will have a direct or indirect material interest.

Other Relationships

TVA is engaged in a number of transactions with other agencies of the U.S. government, although such agencies do not fall within the definition of "related parties" for purposes of Item 404(a) of Regulation S-K. These include, among other things, supplying electricity to other federal agencies, purchasing electricity from the Southeastern Power Administration, and engaging in various arrangements involving nuclear materials with the Department of Energy. See Part I, Item 1, Business and Note 23 — Related Parties.

TVA also has access to a financing arrangement with the United States Department of the Treasury ("U.S. Treasury"). TVA and the U.S. Treasury have a memorandum of understanding under which the U.S. Treasury provides TVA with a $150 million credit facility. There were no outstanding borrowings under the facility at September 30, 2023. This credit facility has a maturity date of September 30, 2024, and is typically renewed annually. This arrangement is pursuant to the TVA Act. Access to this credit facility or other similar financing arrangements with the U.S. Treasury has been available to TVA since the 1960s. See Note 14 — Debt and Other Obligations — Credit Facility Agreements.

In addition, TVA is required by the 1959 amendment to the TVA Act to make annual payments to the U.S. Treasury from net power proceeds as a repayment of and as a return on the government's appropriation investment in TVA's power facilities (the "Power Program Appropriation Investment") until $1.0 billion of the Power Program Appropriation Investment has been repaid. With the 2014 payment, TVA fulfilled its requirement to repay $1.0 billion of the Power Program Appropriation Investment. The TVA Act requires TVA to continue to make payments to the U.S. Treasury indefinitely as a return on the remaining $258 million of the Power Program Appropriation Investment. See Note 23 — Related Parties.

The TVA Act requires the proceeds for each fiscal year derived from the sale of power or any other activities to be paid into the U.S. Treasury on March 31 of each year, except for the portion of such proceeds as in the opinion of the TVA Board shall be necessary for TVA in the operation of dams and reservoirs and in conducting its business in generating, transmitting, and distributing electric energy. For each fiscal year, the TVA Board adopts a resolution retaining for use in the operation of the TVA power system the entire margin of net power proceeds remaining at the conclusion of such fiscal year.

223

Table of Contents

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES

The following table shows the fees of Ernst & Young LLP for audit, audit-related, and other services for the years ended September 30, 2023 and 2022.


Principal Accountant Fees and Services (in actual dollars)
Year	Principal Accountant	Audit Fees(1)		Audit-Related Fees		Tax Fees		All Other Fees(2)		Total
2023	Ernst & Young LLP	$	3,581,554	$	—	$	—	$	255,040	$	3,836,594
2022	Ernst & Young LLP	3,277,337		—		—		3,545		3,280,882

Notes

(1) Audit fees consist of payments for professional services rendered in connection with the audit of TVA's annual financial statements, including the annual attestation on internal control over financial reporting; review of interim financial statements included in TVA's quarterly reports; audit of TVA's fuel cost adjustment; federal financial reporting responsibilities for the preparation and audit of the 2023 and 2022 federal consolidated financial statements of which TVA is a component; Bond offering and other financing comfort letters; and attestation on TVA's management report of eligible green expenditures.

(2) All other fees reflect accounting and financial reporting research software license costs and advisory services related to the proposed SEC climate-related rule.

The TVA Board has an Audit, Finance, Risk, and Cybersecurity Committee ("Audit Committee"). Under the TVA Act, the Audit Committee, in consultation with the Inspector General, recommends to the TVA Board the selection of an external auditor. TVA's Audit Committee, in consultation with the Inspector General, recommended that the TVA Board select Ernst & Young LLP as TVA's external auditor for the 2023 and 2022 audits and other related services, and the TVA Board approved these recommendations.

TVA has a policy (the "Policy") that requires all auditing services and permissible non-audit services provided by the external auditor to be pre-approved by the Audit Committee. The Policy also lists the following services as ones the external auditor is not permitted to perform:

•Bookkeeping or other services related to the accounting records or financial statements of TVA;

•Financial information system design and implementation;

•Appraisal or valuation services, fairness opinions, and contribution-in-kind reports;

•Actuarial services;

•Internal audit outsourcing services;

•Management functions or human resources;

•Broker or dealer, investment adviser, or investment banking services;

•Legal services and expert services unrelated to the audit; and

•Any other services that the Public Company Accounting Oversight Board determines, by regulation, are impermissible.

The Policy also delegates to the Chair of the Audit Committee the authority to pre-approve a permissible service so long as the amount of the service does not exceed $100,000 and the total amount of services pre-approved during the year by the Chair does not exceed $200,000. The Chair must report for informational purposes the services pre-approved under this provision at the Audit Committee's next meeting.

The Audit Committee pre-approved all audit services for 2023 and 2022.

224

Table of Contents

PART IV

ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES

(a) The following documents have been filed as part of this Annual Report on Form 10-K for the fiscal year ended September 30, 2023 ("Annual Report"):

(1) Consolidated Financial Statements. The following documents are provided in Part II, Item 8, Financial Statements and Supplementary Data herein:

Consolidated Statements of Operations

Consolidated Statements of Comprehensive Income (Loss)

Consolidated Balance Sheets

Consolidated Statements of Cash Flows

Consolidated Statements of Changes in Proprietary Capital

Notes to Consolidated Financial Statements

Report of Independent Registered Public Accounting Firm (Ernst & Young LLP)

(2) Consolidated Financial Statement Schedules.

Schedules not included are omitted because they are not required or because the required information is provided in the consolidated financial statements, including the notes thereto.

(3) List of Exhibits


Exhibit No.			Description
3.1			Tennessee Valley Authority Act of 1933, as amended, 16 U.S.C. §§ 831-831ee (Incorporated by reference to Exhibit 3.1 to TVA's Quarterly Report on Form 10-Q for the quarter ended December 31, 2016, File No. 000-52313)

3.2			Bylaws of the Tennessee Valley Authority Adopted by the TVA Board of Directors on May 18, 2006, as amended on April 3, 2008, May 19, 2008, June 10, 2010, February 13, 2014, August 21, 2014, and November 6, 2014 (Incorporated by reference to Exhibit 3.2 to TVA's Annual Report on Form 10-K for the year ended September 30, 2014, File No. 000-52313)

4.1			Basic Tennessee Valley Authority Power Bond Resolution Adopted by the TVA Board of Directors on October 6, 1960, as Amended on September 28, 1976, October 17, 1989, and March 25, 1992 (Incorporated by reference to Exhibit 4.1 to TVA's Annual Report on Form 10-K for the year ended September 30, 2006, File No. 000-52313)

10.1			Second Amended and Restated March Maturity Credit Agreement Dated as of March 25, 2022, Among Tennessee Valley Authority, as the Borrower, Toronto Dominion (Texas) LLC, as Administrative Agent, The Toronto-Dominion Bank, New York Branch, as Letter of Credit Issuer and a Lender, Bank of America, N.A., Canadian Imperial Bank of Commerce, New York Branch, First Horizon Bank, Morgan Stanley Bank, N.A., and The Bank of New York Mellon (Incorporated by reference to Exhibit 10.1 to TVA's Current Report on Form 8-K filed on March 30, 2022, File No. 000-52313)

10.2			Second Amended and Restated September Maturity Credit Agreement Dated as of September 21, 2021, Among Tennessee Valley Authority, as the Borrower, Royal Bank of Canada, as Administrative Agent, Letter of Credit Issuer, and a Lender, and the Other Lenders Party Thereto (Incorporated by reference to Exhibit 10.1 to TVA's Current Report on Form 8-K filed on September 24, 2021, File No. 000-52313)

10.3			First Amendment Dat ed as of March 29, 2023, to Second Amended and Restated September Maturity Credit Agreement Dated as of September 21, 2021, Among Tennessee Valley Authority, as the Borrower, Royal Bank of Canada, as Administrative Agent, Letter of Credit Issuer, and a Lender, and the Other Lenders Party Thereto (Incorporated by reference to Exhibit 10.2 to TVA's Current Report on Form 8-K filed on April 3, 2023 , File No. 000-52313)

10.4			$500,000,000 February Maturity Credit Agreement Dated as of August 7, 2015, Among TVA, Bank of America, N.A., as Administrative Agent, Letter of Credit Issuer, and a Lender, and the Other Lenders Party Thereto (Incorporated by reference to Exhibit 10.1 to TVA's Current Report on Form 8-K filed on August 7, 2015, File No. 000-52313)

10.5			First Amendment Dated as of February 28, 2017, to the $500,000,000 February Maturity Credit Agreement Dated as of August 7, 2015, Among TVA, Bank of America, N.A., as Administrative Agent, Letter of Credit Issuer, and a Lender, and the Other Lenders Party Thereto (Incorporated by reference to Exhibit 10.1 to TVA's Current Report on Form 8-K filed on March 3, 2017, File No. 000-52313)

10.6			Second Amendment Dated as of February 21, 2018, to the $500,000,000 February Maturity Credit Agreement Dated as of August 7, 2015, and Amended as of February 28, 2017, Among TVA, Bank of America, N.A., as Administrative Agent, Letter of Credit Issuer, and a Lender, and the Other Lenders Party Thereto (Incorporated by reference to Exhibit 10.1 to TVA's Current Report on Form 8-K filed on February 26, 2018, File No. 000-52313)

225

Table of Contents


10.7			Third Amendment Dated as of February 27, 2020, to the $500,000,000 February Maturity Credit Agreement Dated as of August 7, 2015, and Amended as of February 28, 2017, and February 21, 2018, Among TVA, Bank of America, N.A., as Administrative Agent, Letter of Credit Issuer, and a Lender, and the Other Lenders Party Thereto (Incorporated by reference to Exhibit 10.1 to TVA's Current Report on Form 8-K filed on March 3, 2020, File No. 000-52313)

10.8			Fourth Amendment Dated as of January 5, 2023, to the $500,000,000 February Maturity Credit Agreement Dated as of August 7, 2015, and Amended as of February 28, 2017, February 21, 2018, and February 27, 2020, Among TVA, Bank of America, N.A., as Administrative Agent, Letter of Credit Issuer, and a Lender, and the Other Lenders Party Thereto (Incorporated by reference to Exhibit 10.1 to TVA's Current Report on Form 8-K filed on January 6, 2023, File No. 000-52313)

10.9			December 2019 Maturity Community Bank Credit Agreement Dated as of December 12, 2016, with SunTrust Bank as Administrative Agent and a Lender, Branch Banking and Trust Company as Letter of Credit Issuer and a Lender, First National Bank, First Tennessee Bank National Association, HomeTrust Bank, Pinnacle Bank, Regions Bank, Trustmark National Bank, and United Community Bank (Incorporated by reference to Exhibit 10.1 to TVA's Current Report on Form 8-K filed on December 15, 2016, File No. 000-52313)

10.10			First Amendment Dated as of December 11, 2018, to December Maturity Community Bank Credit Agreement Dated as of December 12, 2016 (Incorporated by reference to Exhibit 10.1 to TVA's Current Report on Form 8-K filed on December 14, 2018, File No. 000-52313)

10.11			Second Amendment Dated as of February 9, 2021, to December Maturity Community Bank Credit Agreement Dated as of December 12, 2016, and Amended as of December 11, 2018 (Incorporated by reference to Exhibit 10.3 to TVA's Quarterly Report on Form 10-Q for the quarter ended December 31, 2020, File No. 000-52313)

10.12			Third Amendment Dated as of March 29, 2023, to December Maturity Community Bank Credit Agreement Dated as of December 12, 2016, and Amended as of December 11, 2018 and February 9, 2021, Among Tennessee Valley Authority, as the Borrower, Truist Bank, as Administrati ve Agen t , Letter of Credit Issuer, and a Lender, and the Other Lenders Party Thereto (Incorporated by reference to Exhibit 10.1 to TVA's Current Report on Form 8 -K filed on April 3, 2023 , File No. 000-52313)

10.13			TVA Discount Notes Selling Group Agreement (Incorporated by reference to Exhibit 10.2 to TVA's Quarterly Report on Form 10-Q for the quarter ended June 30, 2008, File No. 000-52313)

10.14			Electronotes® Selling Agent Agreement Dated as of June 1, 2006, Among TVA, LaSalle Financial Services, Inc., A.G. Edwards & Sons, Inc., Citigroup Global Markets Inc., Edward D. Jones & Co., L.P., First Tennessee Bank National Association, J.J.B. Hilliard, W.L. Lyons, Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated, Morgan Stanley & Co. Incorporated, and Wachovia Securities, LLC (Incorporated by reference to Exhibit 10.4 to TVA's Annual Report on Form 10-K for the year ended September 30, 2006, File No. 000-52313)

10.15			Amendment Dated as of December 4, 2013, to Electronotes® Selling Agent Agreement Dated as of June 1, 2006, Among TVA, LaSalle Financial Services, Inc., A.G. Edwards & Sons, Inc., Citigroup Global Markets Inc., Edward D. Jones & Co., L.P., First Tennessee Bank National Association, J.J.B. Hilliard, W.L. Lyons, Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated, Morgan Stanley & Co. Incorporated, and Wachovia Securities, LLC (Incorporated by reference to Exhibit 10.3 to TVA's Quarterly Report on Form 10-Q for the quarter ended March 31, 2014, File No. 000-52313)

10.16			Second Amendment Dated as of August 28, 2015, to Electronotes® Selling Agent Agreement Dated as of June 1, 2006, and Amended as of December 4, 2013, Among TVA, LaSalle Financial Services, Inc., A.G. Edwards & Sons, Inc., Citigroup Global Markets Inc., Edward D. Jones & Co., L.P., First Tennessee Bank National Association, J.J.B. Hilliard, W.L. Lyons, Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated, Morgan Stanley & Co. Incorporated, and Wachovia Securities, LLC (Incorporated by reference to Exhibit 10.9 to TVA's Annual Report on Form 10-K for the year ended September 30, 2015, File No. 000-52313)

10.17			Assumption Agreement Between TVA and Incapital LLC Dated as of February 29, 2008, Relating to the Electronotes® Selling Agent Agreement Dated as of June 1, 2006, Among TVA, LaSalle Financial Services, Inc., A.G. Edwards & Sons, Inc., Citigroup Global Markets Inc., Edward D. Jones & Co., L.P., First Tennessee Bank National Association, J.J.B. Hilliard, W.L. Lyons, Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated, Morgan Stanley & Co. Incorporated, and Wachovia Securities, LLC (Incorporated by reference to Exhibit 10.1 to TVA's Quarterly Report on Form 10-Q for the quarter ended March 31, 2008, File No. 000-52313)

10.18			Facility Lease-Purchase Agreement Dated as of January 17, 2012, Between John Sevier Combined Cycle Generation LLC and TVA (Incorporated by reference to Exhibit 10.1 to TVA's Quarterly Report on Form 10-Q for the quarter ended December 31, 2011, File No. 000-52313)

10.19			Head Lease Agreement Dated as of January 17, 2012, Among the United States of America, TVA, and John Sevier Combined Cycle Generation LLC (Incorporated by reference to Exhibit 10.2 to TVA's Quarterly Report on Form 10-Q for the quarter ended December 31, 2011, File No. 000-52313)

10.20*			Asset Purchase Agreement Dated as of August 6, 2013, Between TVA and Seven States Southaven, LLC (Incorporated by reference to Exhibit 10.33 to TVA's Annual Report on Form 10-K for the year ended September 30, 2013, File No. 000-52313)

226

Table of Contents


10.21			Facility Lease-Purchase Agreement Dated as of August 9, 2013, Between Southaven Combined Cycle Generation LLC and TVA (Incorporated by reference to Exhibit 10.34 to TVA's Annual Report on Form 10-K for the year ended September 30, 2013, File No. 000-52313)

10.22			Head Lease Agreement Dated as of August 9, 2013, Among the United States of America, TVA, and Southaven Combined Cycle Generation LLC (Incorporated by reference to Exhibit 10.35 to TVA's Annual Report on Form 10-K for the year ended September 30, 2013, File No. 000-52313)

10.23*			Federal Facilities Compliance Agreement Between the United States Environmental Protection Agency and TVA (Incorporated by reference to Exhibit 10.2 to TVA's Quarterly Report on Form 10-Q for the quarter ended June 30, 2011, File No. 000-52313)

10.24*			Consent Decree Among Alabama, Kentucky, North Carolina, Tennessee, the Alabama Department of Environmental Management, the National Parks Conservation Association, Inc., the Sierra Club, Our Children's Earth Foundation, and TVA (Incorporated by reference to Exhibit 10.3 to TVA's Quarterly Report on Form 10-Q for the quarter ended June 30, 2011, File No. 000-52313)



10.25†			Amended and Restated TVA Compensation Plan Approved by the TVA Board on May 11, 2022 (Incorporated by reference to Exhibit 10.1 to TVA's Quarterly Report on Form 10-Q for the quarter ended March 31, 2022, File No. 000-52313)

10.26†			Amended and Restated Supplemental Executive Retirement Plan Effective as of May 1, 2015 (Incorporated by reference to Exhibit 10.1 to TVA's Quarterly Report on Form 10-Q for the quarter ended June 30, 2015, File No. 000-52313)

10.27†			Amended and Restated Executive Annual Incentive Plan Adopted as of May 10, 2022 (Incorporated by reference to Exhibit 10.2 to TVA's Quarterly Report on Form 10-Q for the quarter ended March 31, 2022, File No. 000-52313)

10.28†			Amended and Restated Deferred Compensation Plan Adopted as of May 4, 2020 (Incorporated by reference to Exhibit 10.2 to TVA's Quarterly Report on Form 10-Q for the quarter ended March 31, 2020, File No. 000-52313)

10.29†			Amended and Restated Long-Term Incentive Plan Adopted as of May 10, 2022 (Incorporated by reference to Exhibit 10.3 to TVA's Quarterly Report on Form 10-Q for the quarter ended March 31, 2022, File No. 000-52313)

10.30†			Executive Severance Plan Adopted as of February 10, 2021, and Amended as of February 11, 2021 (Incorporated by reference to Exhibit 10.2 to TVA's Quarterly Report on Form 10-Q for the quarter ended December 31, 2020, File No. 000-52313)

10.31†			Retention Incentive Plan Effective as of October 1, 2015 (Incorporated by reference to Exhibit 10.2 to TVA's Current Report on Form 8-K filed on October 1, 2015, File No. 000-52313)

10.32†			Offer Letter to Jeffrey J. Lyash Approved as of February 14, 2019 (Incorporated by reference to Exhibit 10.1 to TVA's Current Report on Form 8-K filed on February 14, 2019, File No. 000-52313)

10.33†			Acknowledgment by TVA and Jeffrey J. Lyash on March 25, 2019, Relating to the Offer Letter to Mr. Lyash Approved as of February 14, 2019 (Incorporated by reference to Exhibit 10.2 to TVA's Quarterly Report on Form 10-Q for the quarter ended March 31, 2019, File No. 000-52313)

10.34†			Offer Letter to Timothy S. Rausch Accepted as of September 18, 2018 (Incorporated by reference to Exhibit 10.39 to TVA's Annual Report on Form 10-K/A for the year ended September 30, 2019, File No. 000-52313)

10.35†			Offer Letter to David Fountain Accepted as of April 1, 2020 (Incorporated by reference to Exhibit 10.42 to TVA's Annual Report on Form 10-K for the year ended September 30, 2021, File No. 000-52313)

10.36†			Offer Letter to Donald A. Moul Approved as of May 24, 2021 (Incorporated by reference to Exhibit 10.2 to TVA's Quarterly Report on Form 10-Q for the quarter ended June 30, 2021, File No. 000-52313)

14.1			Disclosure and Financial Ethics Code (Incorporated by reference to Exhibit 14 to TVA's Annual Report on Form 10-K for the year ended September 30, 2006, File No. 000-52313)

14.2			TVA Conflict of Interest Policy, as amended (Incorporated by reference to Exhibit 14.2 to TVA's Annual Report on Form 10-K for the year ended September 30, 2014, File No. 000-52313)

19.1			Tennessee Valley Authority Insider Trading Policy Adopted by the TVA Board of Directors on November 9, 2023

31.1			Rule 13a-14(a)/15d-14(a) Certification Executed by the Chief Executive Officer

227

Table of Contents



31.2			Rule 13a-14(a)/15d-14(a) Certification Executed by the Chief Financial Officer

32.1			Section 1350 Certification Executed by the Chief Executive Officer

32.2			Section 1350 Certification Executed by the Chief Financial Officer

97.1			Tennessee Valley Authority Policy for the Recovery of Erroneously Awarded Compensation Adopted by the TVA Board on November 9, 2023

101.INS			Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document

101.SCH			Inline XBRL Taxonomy Extension Schema

101.CAL			Inline XBRL Taxonomy Extension Calculation Linkbase

101.DEF			Inline XBRL Taxonomy Extension Definition Linkbase

101.LAB			Inline XBRL Taxonomy Extension Label Linkbase

101.PRE			Inline XBRL Taxonomy Extension Presentation Linkbase

104			Cover Page Interactive Data File - formatted in Inline XBRL and contained in Exhibit 101
† Management contract or compensatory arrangement. * Certain schedule(s) and/or exhibit(s) have been omitted. TVA hereby undertakes to furnish supplementally copies of any of the omitted schedules and/or exhibits upon request by the Securities and Exchange Commission.

ITEM 16. FORM 10-K SUMMARY

Not applicable.

228

Table of Contents

SIGNATURES

Pursuant to the requirements of Section 13, 15(d), or 37 of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.


Date:	November 13, 2023		TENNESSEE VALLEY AUTHORITY
			(Registrant)
		By:	/s/ Jeffrey J. Lyash
			Jeffrey J. Lyash
			President and Chief Executive Officer

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

229

Table of Contents


Signature	Title	Date



/s/ Jeffrey J. Lyash	President and Chief Executive Officer	November 13, 2023
Jeffrey J. Lyash	(Principal Executive Officer)


/s/ John M. Thomas, III	Executive Vice President and	November 13, 2023
John M. Thomas, III	Chief Financial and Strategy Officer
	(Principal Financial Officer)

/s/ Diane Wear	Vice President and Controller	November 13, 2023
Diane Wear	(Principal Accounting Officer)


/s/ Joe H. Ritch	Chair	November 13, 2023
Joe H. Ritch


/s/ William B. Kilbride	Director	November 13, 2023
William B. Kilbride


/s/ Beth H. Harwell	Director	November 13, 2023
Beth H. Harwell


/s/ Brian E. Noland	Director	November 13, 2023
Brian E. Noland


/s/ Beth P. Geer	Director	November 13, 2023
Beth P. Geer


/s/ L. Michelle Moore	Director	November 13, 2023
L. Michelle Moore


/s/ Robert P. Klein	Director	November 13, 2023
Robert P. Klein


/s/ William J. Renick	Director	November 13, 2023
William J. Renick


/s/ A. Wade White	Director	November 13, 2023
A. Wade White

230

EXHIBIT 19.1

Tennessee Valley Authority

Insider Trading Policy

1. Establishment and Purpose

1.1 Establishment. The Tennessee Valley Authority (“TVA”) hereby establishes this Insider Trading Policy (“Policy”).

1.2 Purpose. The purpose of this Policy is to provide guidelines with respect to transactions in TVA Securities (as defined below) and the handling of confidential information about TVA and the companies with which TVA engages in transactions or does business. TVA’s Board of Directors has adopted this Policy to promote compliance with U.S. federal, state, and foreign securities laws that prohibit certain persons who are aware of material nonpublic information about TVA from (1) purchasing, selling, or otherwise engaging in transactions in TVA Securities, or (2) providing material nonpublic information to other persons who may trade on the basis of that information. The prohibitions against insider trading apply to trading or otherwise transacting in TVA Securities, Tipping (as defined below), and making recommendations to engage in transactions in TVA securities by virtually any person, including all persons associated with TVA, if the information involved is material and nonpublic. In addition, the prohibitions against insider trading extend to transactions in the securities of other companies if the transactions are based on material nonpublic information gained while working for TVA.

1.3 Effective Date. This Policy is effective on November 9, 2023.

2. Definitions

2.1 “Controlled Entities” means any entity whose transactions in TVA Securities are directed by an Insider (as defined below) or are subject to an Insider’s influence and control. Transactions by Controlled Entities are subject to this Policy and are treated as if they were for the Insider’s own account.

2.2 “Family Members” means an Insider’s Family Members who reside with the Insider (including a spouse, child, a child away at college, stepchildren, grandchildren, parents, stepparents, grandparents, siblings, nieces, nephews, and in-laws), anyone else who lives in the Insider’s household, and any family members who do not live in the Insider’s household but whose transactions in TVA Securities are directed by the Insider or are subject to the Insider’s influence and control. Insiders are responsible for the transactions of Family Members and should make them aware of the need to confer with the Insider before they trade in TVA Securities. The Insider should treat all transactions for the purposes of this Policy and applicable securities laws as if the transactions were for the Insider’s own account.

2.3 “Insider” means all officers, directors, employees, and contractors of TVA who have access to material nonpublic information. TVA may also determine that other persons should be subject to this Policy, such as consultants who have access to material nonpublic information.

2.4 “Material Information” means any information a reasonable investor would consider important in making a decision to buy, hold, or sell securities. Any information that could reasonably be expected to affect the value of TVA Securities, whether it is positive or negative, should be considered material. There is no bright-line standard for assessing materiality; rather, materiality is based on an assessment of all the facts and circumstances.

2.5 “Nonpublic Information” means information that has not been disclosed to the public. To establish that the information has been disclosed to the public, it may be necessary to demonstrate that the information has been widely disseminated. Widely disseminated means that the information has been disclosed through the newswire services, a broadcast on widely-available radio or television programs, publication in a widely-available newspaper, magazine, or news website, publication on the “Investors” portion of TVA’s website, or public disclosures in documents filed with the Securities and Exchange Commission (“SEC”) that are available on the SEC’s website. By contrast, information would likely not be considered widely disseminated if it is available only to TVA’s employees, or if it is available only to a select group of analysts, brokers, or institutional investors.

2.6 “Restricted Period” means any period during which the suspension of transactions involving TVA Securities is imposed under this Policy.

2.7 “Tipping” means communicating material nonpublic information to any persons who might be expected to trade while in possession of that information.

2.8 “TVA Securities” means any bonds, notes, or other securities issued by TVA. For the avoidance of doubt, TVA Securities do not include diversified investment vehicles that hold bonds, notes, or other securities issued by TVA.

3. Administration of the Policy

TVA’s General Counsel shall serve as the Compliance Officer for purposes of administering this Policy. In the General Counsel’s absence, the General Counsel may designate another officer, director, or employee to administer this Policy. All determinations and interpretations by the Compliance Officer shall be final and are not subject to further review.

4. General Prohibition on Insider Trading

No Insider (or any other person designated by this Policy or by the Compliance Officer as subject to this Policy) who is aware of material nonpublic information relating to TVA may directly, or indirectly through Family Members or Controlled Entities:

4.1 Engage in transactions in TVA Securities, except as otherwise specified in this Policy;

4.2 Recommend that others engage in transactions in any TVA Securities;

4.3 Disclose any material nonpublic information outside of TVA to other persons, including, but not limited to, family, friends, business associates, investors, and expert consulting firms, unless any such disclosure is made in accordance with TVA’s policies regarding the protection or authorized external disclosure of information regarding TVA; or

4.4 Assist anyone engaged in the above activities.

Additionally, no Insider (or any other person designated by this Policy or by the Compliance Officer as subject to this Policy) who, in the course of working for TVA, learns of material nonpublic information about another company (1) with which TVA does business, such as TVA’s customers, vendors, suppliers, and contractors, or (2) that is involved in a potential transaction or business relationship with TVA, may engage in transactions in that company’s securities until the information becomes public or is no longer material.

5. Prohibition Against Derivative Transactions

TVA considers it inappropriate for Insiders to engage in speculative transactions in TVA Securities or in certain other transactions in TVA Securities that may lead to inadvertent violations of insider trading laws or that create a conflict of interest for the Insider. Therefore, Insiders may not engage in any of the following transactions with respect to TVA Securities:

5.1 Purchase or pledge TVA Securities on margin or as collateral to secure a loan or other obligation;

5.2 Engage in short sales (a sale of securities that the seller does not own or a sale that is completed by delivery of borrowed securities) with respect to TVA Securities; or

5.3 Enter into any derivative or similar transactions with respect to TVA Securities, such as purchases or sales of put or call options, forward transactions, swap or exchange agreements, or any similar agreements or arrangements.

In addition, from time to time, TVA may determine that other types of transactions by Insiders in TVA Securities shall be prohibited or shall be permitted only with the prior written consent of the Compliance Officer.

6. Pre-Clearance of Transactions

To provide assistance in preventing inadvertent violations of applicable securities laws and to avoid the appearance of impropriety in connection with the purchase and sale of TVA Securities, all transactions in TVA Securities by Insiders must be pre-cleared by the Compliance Officer. Pre-clearance does not relieve Insiders of their responsibilities under applicable securities laws. An Insider seeking pre-clearance must:

6.1 Submit a written request for pre-clearance at least two business days in advance of the proposed transaction which includes:

6.1.1 The identity of the Insider;

6.1.2 The proposed transaction; and

6.1.3 The date of the proposed transaction.

6.2 Execute a written certification that the Insider is not aware of material nonpublic information about TVA.

The Compliance Officer shall have sole discretion to decide whether to clear any contemplated transaction. All pre-cleared transactions must be effected within seven business days of receipt of the pre-clearance unless a specific exception has been granted by the Compliance Officer. Any pre-cleared transaction that has not been effected during the seven-business day period must be pre-cleared again prior to execution, implementing the same procedure described above. Notwithstanding receipt of pre-clearance, if the pre-cleared Insider becomes aware of material nonpublic information or becomes subject to a Restricted Period before the transaction is effected, the transaction may not be completed.

7. Restricted Periods

7.1 Quarterly Restricted Periods. Insiders, their Family Members and Controlled Entities, and other persons designated by the Compliance Officer as subject to this restriction, may not conduct any transactions involving TVA Securities (other than as specified by this Policy), during the period beginning 14 days prior to the end of each fiscal quarter and ending at the completion of 3 business days following the date of the public release of TVA’s earnings results for that quarter. Accordingly, these persons may only conduct transactions in TVA Securities during the period beginning on the start of the 4th business day following the public release of TVA’s quarterly earnings and ending at the end of the 15th day prior to the close of the next fiscal quarter (each such period, a “Trading Window”).

7.2 Special Restricted Periods. In addition to Quarterly Restricted Periods, from time to time, TVA may also require that all or certain Insiders refrain from engaging in transactions involving TVA Securities for a specified period of time because of material information known to TVA and not yet disclosed to the public. In such event, such Insiders should not disclose to others the fact of such restriction.

7.3 Exceptions. The Restricted Periods do not apply to transactions conducted pursuant to approved Rule 10b5-1 plans.

A Trading Window is a company compliance requirement and does not constitute a legal right to trade in TVA Securities. Accordingly, even during Trading Windows, persons covered by this Policy in possession of material nonpublic information may not trade in TVA Securities unless the transaction is conducted pursuant to an approved Rule 10b5-1 plan.

8. Rule 10b5-1 Plans

Rule 10b5-1 under the Securities Exchange Act of 1934, as amended, provides a defense from insider trading liability under Rule 10b-5. In order to be eligible to rely on this defense, a person subject to this Policy must enter into a written trading plan for transactions in TVA Securities that meets the conditions specified in Rule 10b5-1 (a “Rule 10b5-1 plan”), and that plan must be in accordance with this Policy and TVA guidelines. If the plan meets those requirements, Insiders may engage in transactions in TVA Securities pursuant to the Rule 10b5-1 plan during Restricted Periods or even if the Insider is aware of material nonpublic information at the time of such transaction.

To comply with this Policy, a Rule 10b5-1 plan must be approved by the Compliance Officer and meet the requirements of Rule 10b5-1. Rule 10b5-1 plans must be entered into at a time when the person entering into the plan is not aware of material nonpublic information and not subject to a Restricted Period. Once the plan is adopted, the person must not exercise any influence over the amount of securities to be traded, the price at which they are to be traded, or the date of the trade. The plan must either specify the amount, pricing, and timing of transactions in advance or delegate discretion on these matters to an independent third party. The plan must include a cooling-off period before trading can commence. For directors and officers, the cooling-off period ends on the later of (i) 90 days after the adoption of the Rule 10b5-1 plan or (ii) two business days following the disclosure of TVA’s financial results in an SEC periodic report for the fiscal quarter in which the plan was adopted, but in any event, the required cooling-off period is subject to a maximum of 120 days after adoption of the plan. For persons other than officers or directors, the cooling-off period ends 30 days following the adoption or modification of a Rule 10b5-1 plan. A person may not enter into overlapping Rule 10b5-1 plans (subject to exceptions laid out in 17 C.F.R. § 240.10b5-1(c)(1)(ii)(D)) and may enter into only one single-trade Rule 10b5-1 plan during any 12-month period (subject to exceptions laid out in 17 C.F.R. § 240.10b5-1(c)(1)(ii)(E)). Any modification or change to the amount, price, or timing of the purchase or sale of TVA Securities underlying the Rule 10b5-1 plan is a termination of such plan and adoption of a new plan.

All persons who create a Rule 10b5-1 plan must include a representation certifying that, on the date of adoption of the plan: (i) they are not aware of any material nonpublic information about TVA or TVA Securities; and (ii) they are adopting the plan in good faith and not as part of a plan or scheme to evade the prohibitions in Rule 10b-5. All persons entering into a Rule 10b5-1 plan must act in good faith with respect to that plan, including with respect to any modification or termination of the plan, and must notify the Compliance Officer immediately of the termination of the plan.

Any Rule 10b5-1 plan must be submitted for approval five business days prior to the entry into the Rule 10b5-1 plan. No further pre-approval of transactions conducted pursuant to the Rule 10b5-1 plan will be required.

TVA and TVA’s officers and directors must make certain disclosures in SEC filings concerning Rule 10b5-1 plans. TVA’s officers and directors must undertake to provide any information requested by TVA regarding Rule 10b5-1 plans for the purpose of providing the required disclosures or any other disclosures that TVA deems to be appropriate under the circumstances.

9. Post-Termination Transactions

This Policy continues to apply to transactions in TVA Securities even after an individual’s service to TVA has terminated. If an individual is in possession of material nonpublic information when the individual’s service terminates, that individual may not engage in transactions in TVA Securities or disclose the information until that information has become public or is no longer material. However, the pre-clearance procedures outlined above shall cease to apply to a terminated Insider’s transactions in TVA Securities upon the expiration of any Restricted Period or other TVA-imposed trading restriction applicable at the time of the termination of service.

10. Penalties

Violations of this Policy may lead to disciplinary action by TVA up to and including termination of employment. As required by law or in its discretion, TVA shall notify the proper authorities of any violations of this Policy. Violations of this Policy may also result in civil and criminal penalties, including fines and imprisonment.

11. Individual Responsibility

Persons subject to this Policy have ethical and legal obligations to maintain the confidentiality of information about TVA and to not engage in transactions in TVA Securities while in possession of material nonpublic information. Persons subject to this Policy must not engage in illegal trading and must avoid the appearance of improper trading. Each individual is responsible for complying with this Policy and ensuring that any Controlled Entities and Family Members comply with this Policy. In all cases, the responsibility for determining whether an individual is in possession of material nonpublic information rests with that individual, and any action on the part of TVA, the Compliance Officer, or any other employee, officer, or director pursuant to this Policy (or otherwise) does not in any way constitute legal advice or insulate an individual from liability under applicable securities laws.

12. Ethical Requirements

Members of the TVA Board of Directors hold themselves and each other to the highest standards of integrity, honesty, and ethical conduct. Similarly, the Board of Directors requires all TVA officers, employees, and contractors to conduct themselves with integrity and follow all ethical policies established by TVA and the federal government in their business, practices, actions, and transactions. As such, the Board of Directors hereby incorporates into this Policy the policies, requirements, laws, and regulations set out in the TVA Code of Conduct for the Members of the TVA Board of Directors, the TVA Code of Conduct, the TVA Conflict of Interest Policy, the Standards of Ethical Conduct for Employees of the Executive Branch, including 5 C.F.R. §§ 2635.101(b)(3) and (7), the general federal conflict of interest statute codified at 18 U.S.C. § 208, and § 9(a) of the STOCK Act (Pub. L. 112-105). This Policy supplements the ethical requirements for all TVA directors, officers, employees, and contractors outlined in the aforementioned policies, laws, rules, and regulations.

13. Amendment; Termination

The TVA Board of Directors may at any time amend or terminate all or any portion of this Policy and shall amend this Policy as it deems necessary to comply with applicable laws, regulations, and rules. Notwithstanding anything in this section to the contrary, no amendment or termination of this Policy shall be effective if such amendment or termination would (after taking into account any actions taken by TVA contemporaneously with such amendment or termination) cause TVA to violate any applicable laws, regulations, or rules.

14. Disclosure Requirements

TVA shall file all disclosures with respect to this Policy as required by applicable SEC regulations.

EXHIBIT 31.1

RULE 13a-14(a)/15d-14(a) CERTIFICATION

I, Jeffrey J. Lyash, certify that:

1.I have reviewed this Annual Report on Form 10-K of the Tennessee Valley Authority;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and we have:

a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.


Date:	November 13, 2023	/s/ Jeffrey J. Lyash
		Jeffrey J. Lyash
		President and Chief Executive Officer

EXHIBIT 31.2

RULE 13a-14(a)/15d-14(a) CERTIFICATION

I, John M. Thomas, III, certify that:

1.I have reviewed this Annual Report on Form 10-K of the Tennessee Valley Authority;

b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.


Date:	November 13, 2023	/s/ John M. Thomas, III
		John M. Thomas, III
		Executive Vice President and Chief Financial and Strategy Officer (Principal Financial Officer)

EXHIBIT 32.1

CERTIFICATION FURNISHED PURSUANT TO

SECURITIES EXCHANGE ACT RULE 13a-14(b)

OR RULE 15d-14(b) AND 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report on Form 10-K of the Tennessee Valley Authority (the “Company”) for the year ended September 30, 2023, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Jeffrey J. Lyash, President and Chief Executive Officer of the Company, certify, for the purposes of complying with Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934, as amended, and Section 1350 of Chapter 63 of Title 18 of the United States Code, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) the Report fully complies with the requirements of section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.


/s/ Jeffrey J. Lyash
Jeffrey J. Lyash
President and Chief Executive Officer
November 13, 2023

EXHIBIT 32.2

CERTIFICATION FURNISHED PURSUANT TO

SECURITIES EXCHANGE ACT RULE 13a-14(b)

OR RULE 15d-14(b) AND 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report on Form 10-K of the Tennessee Valley Authority (the “Company”) for the year ended September 30, 2023, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, John M. Thomas, III, Executive Vice President and Chief Financial and Strategy Officer of the Company, certify, for the purposes of complying with Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934, as amended, and Section 1350 of Chapter 63 of Title 18 of the United States Code, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) the Report fully complies with the requirements of section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.


/s/ John M. Thomas, III
John M. Thomas, III
Executive Vice President and Chief Financial and Strategy Officer (Principal Financial Officer)
November 13, 2023

EXHIBIT 97.1

Tennessee Valley Authority

Policy for the Recovery of Erroneously Awarded Compensation

1.Establishment and Purpose

1.1 Establishment. The Tennessee Valley Authority (“TVA”) hereby establishes this Policy for the Recovery of Erroneously Awarded Compensation (“Policy”).

1.2 Purpose. The purpose of this Policy is to comply with the applicable provisions of Section 303A.14 of the NYSE Listed Company Manual, Section 10D of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and Rule 10D-1 under the Exchange Act. This Policy is designed to enable TVA to reasonably promptly recover any Erroneously Awarded Compensation Received by an Executive Officer.

1.3 Effective Date. This Policy is effective on November 9, 2023.

2.Definitions

Wherever used herein, the following terms have the meanings set forth below, unless a different meaning is clearly required by the context:

2.1 “Accounting Restatement” means an accounting restatement filed with the Securities and Exchange Commission (“SEC”) under the Exchange Act, due to the material noncompliance of TVA with any financial reporting requirement under U.S. securities laws (regardless of whether TVA or Executive Officer misconduct was the cause for such restatement), including any required accounting restatement to correct an error in previously issued financial statements that is material to the previously issued financial statements, or that would result in a material misstatement if the error were corrected in the current period or left uncorrected in the current period.

2.2 “Board” means the Board of Directors of TVA.

2.3 “Clawback Eligible Compensation” means all Incentive-Based Compensation Received:

•By a person who served as an Executive Officer at any time during the performance period for that Incentive-Based Compensation;

•On or after October 2, 2023;

•While TVA has a class of securities listed on the New York Stock Exchange ("NYSE”); and

•During the applicable Clawback Period.

2.4 “Clawback Period” means, with respect to any Accounting Restatement, the three completed fiscal years of TVA immediately preceding the Restatement Date, and if TVA changes its fiscal year, any transition period of less than nine months within or immediately following those three completed fiscal years.

2.5 “Committee” means the Audit, Finance, Risk, and Cybersecurity Committee of the Board or any successor committee.

2.6 “Erroneously Awarded Compensation” means, with respect to each Executive Officer in connection with an Accounting Restatement, the amount of Clawback Eligible Compensation that exceeds the amount of Clawback Eligible Compensation that otherwise would have been Received had it been determined based on the restated amounts, computed without regard to any taxes paid.

2.7 “Executive Officer” means TVA’s president, principal executive officer, principal financial officer, principal accounting officer (or if there is no such accounting officer, the controller), any vice-president in charge of a principal business unit, division, or function, any other officer who performs a policy-making function, or any other person who performs similar policy-making functions. For the avoidance of doubt, an “Executive Officer” may include a former Executive Officer who left TVA, retired, or transitioned to an employee role (including after serving as an Executive Officer in an interim capacity) during the applicable Clawback Period. The Executive Officers for a particular Clawback Period typically will be the executive officers identified in Item 10 of TVA’s Annual Reports on Form 10-K (“10-Ks”) that relate to the Clawback Period as well as the individuals who served as executive officers during the periods covered by the 10-Ks but were not serving as executive officers on any of the dates that TVA filed the 10-Ks.

2.8 “Financial Reporting Measures” means measures that are determined and presented in accordance with the accounting principles used in preparing TVA’s financial statements, and any measures that are derived wholly or in part from such measures. A Financial Reporting Measure need not be presented within the financial statements or included in a filing with the SEC.

2.9 “Incentive-Based Compensation” means any compensation that is granted, earned, or vested based wholly or in part upon the attainment of a Financial Reporting Measure. Incentive-Based Compensation does not include (1) any base salaries (except with respect to any salary increases earned wholly or in part based on the attainment of a Financial Reporting Measure performance goal); (2) bonuses paid solely at the discretion of the Committee or Board that are not paid from a “bonus pool” that is determined by satisfying a Financial Reporting Measure performance goal; (3) bonuses paid solely upon satisfying one or more subjective standards and/or completion of a specified employment period; and (4) non-equity incentive plan awards earned solely upon satisfying one or more strategic measures or operational measures.

2.10 “Received” means, with respect to any Incentive-Based Compensation, actual or deemed receipt, and Incentive-Based Compensation shall be deemed Received in TVA’s fiscal period during which the Financial Reporting Measure specified in the Incentive-Based Compensation award is attained, even if the payment or grant of the Incentive-Based Compensation occurs after the end of that period.

2.11 “Restatement Date” means the earlier to occur of:

•The date the Board, a committee of the Board, or TVA’s Chief Financial Officer concludes, or reasonably should have concluded, that TVA is required to prepare an Accounting Restatement; or

•The date a court, regulator, or other legally authorized body directs TVA to prepare an Accounting Restatement.

3.Recovery of Erroneously Awarded Compensation

3.1 In the event TVA must prepare an Accounting Restatement, TVA shall reasonably promptly recover the amount of any Erroneously Awarded Compensation Received by any Executive Officer as follows:

3.1.1 After TVA prepares an Accounting Restatement, the Committee or its delegate shall calculate the amount of any Erroneously Awarded Compensation Received by each Executive Officer. The Committee or its delegate shall then reasonably promptly provide each Executive Officer with a written notice including:

•The amount of any Erroneously Awarded Compensation; and

•A demand for repayment or return of any Erroneously Awarded Compensation as applicable.

3.1.2 Based on the particular facts and circumstances, the Committee or its delegate shall have discretion to dictate the proper methods of recovering Erroneously Awarded Compensation.

3.1.3 Notwithstanding the foregoing, except as set forth in Section 3.2 below, in no event may TVA accept an amount that is less than the amount of Erroneously Awarded Compensation in total satisfaction of an Executive Officer’s obligation hereunder.

3.1.4 To the extent that the Executive Officer has already reimbursed TVA for any Erroneously Awarded Compensation Received under any duplicative recovery obligations established by TVA or applicable law, TVA shall credit the reimbursed amount to the amount of Erroneously Awarded Compensation that is subject to recovery.

3.1.5 In the event that an Executive Officer fails to repay all or part of the Erroneously Awarded Compensation to TVA when due, TVA shall take reasonable and appropriate actions to recover such Erroneously Awarded Compensation from the Executive Officer. The Executive Officer shall be required to reimburse TVA for any and all expenses reasonably incurred (including legal fees) by TVA in recovering such Erroneously Awarded Compensation in accordance with this section.

3.2 Notwithstanding anything herein to the contrary, TVA shall have discretion not to take the actions addressed in Section 3.1 above if the Committee determines in good faith that recovery would be impracticable and one of the following two conditions is met:

3.2.1 The direct expenses paid to a third party to assist in enforcing this Policy would exceed the recoverable amount. Before making this determination, TVA must make a reasonable attempt to recover the Erroneously Awarded Compensation, document such attempt(s), and provide such documentation to the NYSE; or

3.2.2 Recovery would likely cause an otherwise tax-qualified retirement plan, under which benefits are broadly available to employees of TVA, to fail to meet the applicable requirements of the Internal Revenue Code of 1986, as amended, and regulations thereunder.

4.Administration and Interpretation

4.1 Administration. The Committee or its delegate may administer this Policy. The Committee’s determinations shall be final and binding on all affected individuals.

4.2 Interpretation. The Committee or its delegate may interpret and construe this Policy and make all determinations necessary, appropriate, or advisable for the administration of this Policy. All interpretations must comply with applicable laws, regulations, and rules.

5.Prohibition of Indemnification

5.1 TVA may not insure or indemnify any Executive Officer against:

•The loss of any Erroneously Awarded Compensation that is repaid, returned, or recovered pursuant to the terms of this Policy; or

•Any claims relating to TVA’s enforcement of its rights under this Policy.

5.2 Further, TVA shall not enter into any agreement that exempts any Incentive-Based Compensation that is granted, paid, or awarded to an Executive Officer from the application of this Policy or that waives TVA’s right to recover any Erroneously Awarded Compensation, and this Policy shall supersede any such agreement (whether entered into before, on, or after the Effective Date of this Policy).

6.Amendment; Termination

The Board may at any time amend or terminate all or any portion of this Policy and shall amend this Policy as it deems necessary to comply with applicable laws, regulations, and rules. Notwithstanding anything in this section to the contrary, no amendment or termination of this Policy shall be effective if such amendment or termination would (after taking into account any actions taken by TVA contemporaneously with such amendment or termination) cause TVA to violate any applicable laws, regulations, or rules.

7.Disclosure Requirements

TVA shall file all disclosures with respect to this Policy as required by applicable SEC regulations.

8.Other Recovery Rights

This Policy shall be binding and enforceable against all Executive Officers and, to the extent required by applicable law, regulation, or rule, their beneficiaries, heirs, executors, administrators, or other legal representatives. The Board intends that this Policy will be applied to the fullest extent required by applicable law. Any employment agreement, compensation plan, or other agreement or arrangement with an Executive Officer shall be deemed to include, as a condition to the grant of any benefit thereunder, an agreement by the Executive Officer to abide by the terms of this Policy. Any right of recovery under this Policy is in addition to, and not in lieu of, any other remedies or rights of recovery that may be available to TVA under applicable law, regulation, or rule or pursuant to the terms of any policy of TVA or any provision in any employment agreement, compensatory plan, agreement, or other arrangement. This Policy will survive and continue notwithstanding any termination of an Executive Officer’s employment with TVA.

9.Acknowledgement by Covered Persons

TVA will provide notice and seek acknowledgement of this Policy from each Executive Officer, provided that the failure to provide such notice or obtain such acknowledgement will have no impact on the applicability or enforceability of this Policy. After the Effective Date, TVA must be in receipt of an Executive Officer’s acknowledgement as a condition to such Executive Officer’s eligibility to receive Incentive-Based Compensation. All Incentive-Based Compensation subject to this Policy will not be earned, even if already paid, until the Policy ceases to apply to such Incentive-Based Compensation and any other vesting conditions applicable to such Incentive-Based Compensation are satisfied.