Eaton Vance Tax-Managed Buy-Write Income Fund (Form: N-CSR, Received: 02/26/2020 14:28:55)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED

MANAGEMENT INVESTMENT COMPANIES

Investment Company Act File Number: 811-21676

Eaton Vance Tax-Managed Buy-Write Income Fund

(Exact Name of Registrant as Specified in Charter)

Two International Place, Boston, Massachusetts 02110

(Address of Principal Executive Offices)

Maureen A. Gemma

Two International Place, Boston, Massachusetts 02110

(Name and Address of Agent for Services)

(617) 482-8260

(Registrant’s Telephone Number)

December 31

Date of Fiscal Year End

December 31, 2019

Date of Reporting Period

Item 1. Reports to Stockholders

LOGO

Eaton Vance

Tax-Managed Buy-Write Income Fund (ETB)

Annual Report

December 31, 2019

Important Note. Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semi-annual shareholder reports will no longer be sent by mail unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (funds.eatonvance.com/closed-end-fund-and-term-trust-documents.php), and you will be notified by mail each time a report is posted and provided with a website address to access the report.

If you already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. If you hold shares at the Fund’s transfer agent, American Stock Transfer & Trust Company, LLC (“AST”), you may elect to receive shareholder reports and other communications from the Fund electronically by contacting AST. If you own your shares through a financial intermediary (such as a broker-dealer or bank), you must contact your financial intermediary to sign up.

You may elect to receive all future Fund shareholder reports in paper free of charge. If you hold shares at AST, you can inform AST that you wish to continue receiving paper copies of your shareholder reports by calling 1-866-439-6787. If you own these shares through a financial intermediary, you must contact your financial intermediary or follow instructions included with this disclosure, if applicable, to elect to continue to receive paper copies of your shareholder reports. Your election to receive reports in paper will apply to all funds held with AST or to all funds held through your financial intermediary, as applicable.

LOGO

Commodity Futures Trading Commission Registration. Effective December 31, 2012, the Commodity Futures Trading Commission (“CFTC”) adopted certain regulatory changes that subject registered investment companies and advisers to regulation by the CFTC if a fund invests more than a prescribed level of its assets in certain CFTC-regulated instruments (including futures, certain options and swap agreements) or markets itself as providing investment exposure to such instruments. The Fund has claimed an exclusion from the definition of the term “commodity pool operator” under the Commodity Exchange Act. Accordingly, neither the Fund nor the adviser with respect to the operation of the Fund is subject to CFTC regulation. Because of its management of other strategies, the Fund’s adviser is registered with the CFTC as a commodity pool operator and a commodity trading advisor.

Managed Distribution Plan. Pursuant to an exemptive order issued by the Securities and Exchange Commission (Order), the Fund is authorized to distribute long-term capital gains to shareholders more frequently than once per year. Pursuant to the Order, the Fund’s Board of Trustees approved a Managed Distribution Plan (MDP) pursuant to which the Fund makes monthly cash distributions to common shareholders, stated in terms of a fixed amount per common share.

The Fund currently distributes monthly cash distributions equal to $0.1080 per share in accordance with the MDP. You should not draw any conclusions about the Fund’s investment performance from the amount of these distributions or from the terms of the MDP. The MDP will be subject to regular periodic review by the Fund’s Board of Trustees and the Board may amend or terminate the MDP at any time without prior notice to Fund shareholders. However, at this time there are no reasonably foreseeable circumstances that might cause the termination of the MDP.

The Fund may distribute more than its net investment income and net realized capital gains and, therefore, a distribution may include a return of capital. A return of capital distribution does not necessarily reflect the Fund’s investment performance and should not be confused with “yield” or “income.” With each distribution, the Fund will issue a notice to shareholders and a press release containing information about the amount and sources of the distribution and other related information. The amounts and sources of distributions contained in the notice and press release are only estimates and are not provided for tax purposes. The amounts and sources of the Fund’s distributions for tax purposes will be reported to shareholders on Form 1099-DIV for each calendar year.

Fund shares are not insured by the FDIC and are not deposits or other obligations of, or guaranteed by, any depository institution. Shares are subject to investment risks, including possible loss of principal invested.

Annual Report December 31, 2019

Eaton Vance

Tax-Managed Buy-Write Income Fund

Table of Contents


Management’s Discussion of Fund Performance			2

Performance			3

Fund Profile			3

Fund Snapshot			4

Endnotes and Additional Disclosures			5

Financial Statements			6

Report of Independent Registered Public Accounting Firm			19

Federal Tax Information			20

Dividend Reinvestment Plan			21

Management and Organization			23

Important Notices			25

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Management’s Discussion of Fund Performance¹

Economic and Market Conditions

With virtually every U.S. equity index posting strong double-digit returns for the 12-month period ended December 31, 2019 — and bond markets solidly in the black as well — 2019 was a good year for investments.

As the new year dawned in January 2019, investors appeared to be taking a “glass is half full” approach. Although U.S. manufacturing output and business investment remained weak — held back by slowing global growth and an on-again/off-again U.S.-China trade war — strong spending by U.S. consumers and dovish remarks by the U.S. Federal Reserve (the Fed) combined to lift investor sentiment. After four federal funds rate hikes the previous year, markets began to project the Fed might actually lower rates in 2019 to stimulate the economy. U.S. unemployment, meanwhile, remained low and hiring remained strong.

As a result, U.S. stocks across multiple markets climbed from January through April 2019. Overseas, central banks around the world began to cut interest rates and employ other tools to stimulate their respective economies. Even a global stock pullback in May — sparked by heightened concerns about the U.S.-China trade spat — proved to be temporary, and the U.S. and global stock rallies resumed in June and July.

After holding interest rates steady through the first half of the year, the Fed cut the federal funds rate on July 31, 2019 — its first reduction in over a decade — followed by two additional rate cuts in September and October to end the period at 1.50%-1.75%. By end of the third quarter, 60 central banks around the world had lowered their interest rates as well.

After falling in August, U.S. equities rallied again during the final months of the period, spurred by optimism about a U.S.-China trade détente and better-than-expected U.S. employment reports. The year ended with two events in December that did much to allay investor concerns about international trade and tariffs: passage of the United States-Mexico-Canada Agreement by the U.S. House of Representatives and the Trump administration’s agreement to a so-called “phase–one” trade deal with China.

During the 12-month period ended December 31, 2019, the blue-chip Dow Jones Industrial Average^®² returned 25.34%, while the broader U.S. equity market, as measured by the S&P 500^® Index, returned 31.49%. The technology-laden Nasdaq Composite Index returned 36.69% during the period. Large-cap U.S. stocks, as measured by the S&P 500^® Index, generally outperformed their small-cap counterparts, as measured by the Russell 2000^® Index. As a group, growth stocks outpaced value stocks in both large-and small-cap categories, as measured by the Russell growth and value indexes.

Fund Performance

For the 12-month period ended December 31, 2019, Eaton Vance Tax-Managed Buy-Write Income Fund (the Fund) returned 18.50% at net asset value (NAV), underperforming the 31.49% return of the Fund’s equity benchmark, the S&P 500^® Index (the Index); but

outperforming the 15.68% return of the Fund’s options benchmark, the Cboe S&P 500 BuyWrite Index^SM.

The Fund’s options overlay strategy was the largest single detractor from Fund performance versus the S&P 500^® Index, as might be expected during a period of strong equity market performance. The Fund employs an options strategy of writing (selling) stock index call options on a portion of its underlying common stock portfolio. The options strategy is designed to help limit the Fund’s exposure to market volatility and provide current income, but may limit the Fund’s upside potential in a rising market environment.

During the period, the overall market was characterized by strong equity performance and moderate levels of volatility. Despite the equity market rally and sharp decline in realized volatility, however, implied volatility⁶ remained elevated throughout the year due, in part, to investor concerns about trade tensions between the U.S. and China, and a slowdown in global economic growth. In that environment, option premiums received by the Fund could not compensate for decreased participation in positive market returns caused by the options strategy. As a result, the options strategy dragged on Fund performance versus the Index during the period.

The Fund’s common stock portfolio, however, outperformed the Index and contributed to relative performance during the period. On the sector level, stock selections in the information technology (IT), financials, and health care sectors contributed to Fund performance versus the Index. Within IT, an overweight position in hardware and services firm Apple, Inc. (Apple) helped relative results. While Apple’s earnings remained under pressure during the period due to slowing iPhone sales — particularly in its key Asia Pacific region — its stock price advanced over 88% on positive investor sentiment around the company’s growing services business.

In financials, results versus the Index were aided by strong performance of the Fund’s overweight position in S&P Global, Inc., the largest global credit rating agency. Increased global debt issuance in 2019 benefited the firm’s ratings business, while stronger-than-expected growth in its index business helped its stock price as well.

In contrast, stock selections in the consumer discretionary, industrials, and utilities sectors detracted from performance versus the Index. An overweight position in department store chain Kohl’s Corp. (Kohl’s) hurt relative performance in consumer discretionary. Kohl’s stock price declined as the retailer continued to lose market share to both brick-and-mortar and online competitors. The company’s partnership with Amazon.com, Inc. — accepting Amazon returns in its stores for free, without a box or label — failed to provide the expected lift to in-store sales. In industrials, the Fund’s overweight position in 3M Co. (3M), a global manufacturer of industrial, safety, and consumer products, detracted from relative results as well. 3M’s stock price declined after the firm announced lower-than-expected growth in its existing businesses during the period.

See Endnotes and Additional Disclosures in this report.

Past performance is no guarantee of future results. Returns are historical and are calculated net of management fees and other expenses by determining the percentage change in net asset value (NAV) or market price (as applicable) with all distributions reinvested in accordance with the Fund’s Dividend Reinvestment Plan. Performance at market price will differ from performance at NAV due to variations in the Fund’s market price versus NAV, which may reflect factors such as fluctuations in supply and demand for Fund shares, changes in Fund distributions, shifting market expectations for the Fund’s future returns and distribution rates, and other considerations affecting the trading prices of closed-end funds. Investment return and principal value will fluctuate so that shares, when sold, may be worth more or less than their original cost. Performance for periods less than or equal to one year is cumulative. Performance is for the stated time period only; due to market volatility, current Fund performance may be lower or higher than the quoted return. For performance as of the most recent month-end, please refer to eatonvance.com.


		2

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Performance²

Portfolio Managers Michael A. Allison, CFA of Eaton Vance Management and Thomas C. Seto of Parametric Portfolio Associates LLC


% Average Annual Total Returns	Inception Date		One Year			Five Years			Ten Years
Fund at NAV		04/29/2005		18.50	%		7.22	%		9.14	%
Fund at Market Price		—		32.93			9.33			9.08
S&P 500^® Index		—		31.49	%		11.69	%		13.55	%
Cboe S&P 500 BuyWrite Index^SM		—		15.68			7.00			7.04


% Premium/Discount to NAV³
										7.47	%


Distributions⁴
Total Distributions per share for the period									$	1.296
Distribution Rate at NAV										8.49	%
Distribution Rate at Market Price										7.90	%

Fund Profile

Sector Allocation (% of total investments)⁵

LOGO

Top 10 Holdings (% of total investments)⁵



Apple, Inc.	5.3	%

Microsoft Corp.	5.2

Amazon.com, Inc.	2.3

JPMorgan Chase & Co.	2.3

Alphabet, Inc., Class C	1.9

Alphabet, Inc., Class A	1.8

UnitedHealth Group, Inc.	1.8

Mastercard, Inc., Class A	1.7

Facebook, Inc., Class A	1.7

Walt Disney Co. (The)	1.7

Total	25.7	%

See Endnotes and Additional Disclosures in this report.


		3

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Fund Snapshot



Objective		The primary investment objective is to provide current income and gains, with a secondary objective of capital appreciation.

Strategy		The Fund invests in a diversified portfolio of common stocks and writes call options on one or more U.S. indices on a substantial portion of the value of its common stock portfolio to generate current earnings from the option premium. The Fund evaluates returns on an after tax basis and seeks to minimize and defer federal income taxes incurred by shareholders in connection with their investment in the Fund.



Options Strategy		Write Index Covered Calls

Equity Benchmark²		S&P 500^®Index

Morningstar Category		Option Writing

Distribution Frequency		Monthly

Common Stock Portfolio

Positions Held		157

% US / Non-US		100.0/0.0*

Average Market Cap		$314.1 Billion

Call Options Written

% of Stock Portfolio		95%

Average Days to Expiration		16 days

% In the Money		–0.9%

The following terms as used in the Fund snapshot:

Average Market Cap: An indicator of the size of the companies in which the Fund invests and is the sum of each security’s weight in the portfolio multiplied by its market cap. Market Cap is determined by multiplying the price of a share of a company’s common stock by the number of shares outstanding.

Call Option: For an index call option, the buyer has the right to receive from the seller (or writer) a cash payment at the option expiration date equal to any positive difference between the value of the index at contract expiration and the exercise price. The buyer of a call option makes a cash payment (premium) to the seller (writer) of the option upon entering into the option contract.

Covered Call Strategy: A strategy of owning a portfolio of common stocks and writing call options on all or a portion of such stocks to generate current earnings from option premium.

In the Money: For a call option on an index, the extent to which the current price of the index exceeds the exercise price of the option.

* Amount is less than 0.05%

See Endnotes and Additional Disclosures in this report.


		4

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Endnotes and Additional Disclosures

The views expressed in this report are those of the portfolio manager(s) and are current only through the date stated at the top of this page. These views are subject to change at any time based upon market or other conditions, and Eaton Vance and the Fund(s) disclaim any responsibility to update such views. These views may not be relied upon as investment advice and, because investment decisions are based on many factors, may not be relied upon as an indication of trading intent on behalf of any Eaton Vance fund. This commentary may contain statements that are not historical facts, referred to as “forward looking statements.” The Fund’s actual future results may differ significantly from those stated in any forward looking statement, depending on factors such as changes in securities or financial markets or general economic conditions, the volume of sales and purchases of Fund shares, the continuation of investment advisory, administrative and service contracts, and other risks discussed from time to time in the Fund’s filings with the Securities and Exchange Commission.

Dow Jones Industrial Average^® is a price-weighted average of 30 blue-chip stocks that are generally the leaders in their industry. S&P 500^® Index is an unmanaged index of large-cap stocks commonly used as a measure of U.S. stock market performance. S&P Dow Jones Indices are a product of S&P Dow Jones Indices LLC (“S&P DJI”) and have been licensed for use. S&P^® and S&P 500^® are registered trademarks of S&P DJI; Dow Jones^® is a registered trademark of Dow Jones Trademark Holdings LLC (“Dow Jones”); S&P DJI, Dow Jones and their respective affiliates do not sponsor, endorse, sell or promote the Fund, will not have any liability with respect thereto and do not have any liability for any errors, omissions, or interruptions of the S&P Dow Jones Indices. Nasdaq Composite Index is a market capitalization-weighted index of all domestic and international securities listed on Nasdaq. Source: Nasdaq, Inc. The information is provided by Nasdaq (with its affiliates, are referred to as the “Corporations”) and Nasdaq’s third party licensors on an “as is” basis and the Corporations make no guarantees and bear no liability of any kind with respect to the information or the Fund. Russell 2000^® Index is an unmanaged index of 2,000 U.S. small-cap stocks. Cboe S&P 500 BuyWrite IndexSM measures the performance of a hypothetical buy-write strategy on the S&P 500^® Index. Cboe Volatility Index^® tracks the implied volatilities of a wide range of S&P 500^® Index options. Unless otherwise stated, index returns do not reflect the effect of any applicable sales charges, commissions, expenses, taxes or leverage, as applicable. It is not possible to invest directly in an index.

The shares of the Fund often trade at a discount or premium to their net asset value. The discount or premium may vary over time and may be higher or lower than what is quoted in this report. For up-to-date premium/discount information, please refer to https://funds. eatonvance.com/closed-end-fund-prices.php.

⁴

The Distribution Rate is based on the Fund’s last regular distribution per share in the period (annualized) divided by the Fund’s NAV or market price at the end of the period. The Fund’s distributions may be comprised of amounts characterized for federal income tax purposes as qualified and non-qualified ordinary dividends, capital gains and nondividend distributions, also known as return of capital. For additional information about nondividend distributions, please refer to Eaton Vance Closed-End Fund Distribution Notices (19a) posted on our website, eatonvance.com. The Fund will determine the federal income tax character of distributions paid to a shareholder after the end of the calendar year. This is reported on the IRS form 1099-DIV and provided to the shareholder shortly after each year-end. For information about the tax character of distributions made in prior calendar years, please refer to Performance-Tax Character of Distributions on the Fund’s webpage available at eatonvance.com. In recent years, a significant portion of the Fund’s distributions has been characterized as a return of capital. The Fund’s distributions are determined by the investment adviser based on its current assessment of the Fund’s long-term return potential. Fund distributions may be affected by numerous factors including changes in Fund performance, the cost of financing for leverage, portfolio holdings, realized and projected returns, and other factors. As portfolio and market conditions change, the rate of distributions paid by the Fund could change.

⁵	Depictions do not reflect the Fund’s option positions. Excludes cash and cash equivalents.

⁶	Implied volatility refers to the market’s forecasted level of volatility going forward — one commonly used measure is the Cboe Volatility Index^®, which looks 30 days ahead — whereas realized volatility refers to the level of volatility that actually occurred.

Fund snapshot and profile subject to change due to active management.


		5

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Portfolio of Investments


Common Stocks— 101.2%
Security	Shares		Value

Aerospace & Defense— 2.8%

Boeing Co. (The)⁽¹⁾		15,384	$	5,011,492

Northrop Grumman Corp.⁽¹⁾		10,773		3,705,589

Textron, Inc.⁽¹⁾		11,648		519,501

United Technologies Corp.⁽¹⁾		15,120		2,264,371

			$	11,500,953

Air Freight & Logistics— 0.1%

C.H. Robinson Worldwide, Inc.		5,324	$	416,337

			$	416,337

Airlines— 0.5%

Southwest Airlines Co.⁽¹⁾		36,616	$	1,976,532

			$	1,976,532

Auto Components— 0.3%

Garrett Motion, Inc.⁽²⁾		3,219	$	32,158

Lear Corp.⁽¹⁾		7,250		994,700

			$	1,026,858

Banks— 6.1%

Bank of America Corp.⁽¹⁾		96,896	$	3,412,677

Citigroup, Inc.⁽¹⁾		27,548		2,200,810

Fifth Third Bancorp⁽¹⁾		57,446		1,765,890

JPMorgan Chase & Co.⁽¹⁾		66,267		9,237,620

KeyCorp⁽¹⁾		85,122		1,722,869

M&T Bank Corp.⁽¹⁾		4,618		783,906

PNC Financial Services Group, Inc. (The)⁽¹⁾		13,046		2,082,533

Truist Financial Corp.		7,171		403,871

Wells Fargo & Co.⁽¹⁾		56,443		3,036,633

			$	24,646,809

Beverages— 2.3%

Coca-Cola Co. (The)⁽¹⁾		70,732	$	3,915,016

PepsiCo, Inc.⁽¹⁾		38,171		5,216,831

			$	9,131,847

Biotechnology— 1.9%

AbbVie, Inc.⁽¹⁾		19,355	$	1,713,692

Amgen, Inc.⁽¹⁾		15,371		3,705,487

Gilead Sciences, Inc.⁽¹⁾		27,095		1,760,633

Vertex Pharmaceuticals, Inc.⁽²⁾		1,850		405,057

			$	7,584,869


Security	Shares		Value

Building Products— 0.0%⁽³⁾

Resideo Technologies, Inc.⁽²⁾		5,366	$	64,016

			$	64,016

Capital Markets— 1.6%

Raymond James Financial, Inc.		1,309	$	117,103

S&P Global, Inc.⁽¹⁾		14,691		4,011,378

State Street Corp.⁽¹⁾		27,413		2,168,368

			$	6,296,849

Chemicals— 2.0%

AdvanSix, Inc.⁽²⁾		1,530	$	30,539

Corteva, Inc.⁽¹⁾⁽²⁾		26,850		793,686

Dow, Inc.⁽¹⁾⁽²⁾		26,850		1,469,501

DuPont de Nemours, Inc.⁽¹⁾		26,850		1,723,770

Eastman Chemical Co.		3,608		285,970

Ingevity Corp.⁽²⁾		2,787		243,528

Sherwin-Williams Co. (The)⁽¹⁾		6,315		3,685,055

			$	8,232,049

Commercial Services & Supplies— 0.1%

Waste Management, Inc.⁽¹⁾		4,649	$	529,800

			$	529,800

Communications Equipment— 1.2%

Cisco Systems, Inc.⁽¹⁾		98,957	$	4,745,978

			$	4,745,978

Consumer Finance— 1.5%

American Express Co.⁽¹⁾		23,394	$	2,912,319

Discover Financial Services⁽¹⁾		38,799		3,290,931

			$	6,203,250

Containers & Packaging— 0.5%

Avery Dennison Corp.⁽¹⁾		15,307	$	2,002,462

			$	2,002,462

Distributors— 0.7%

Genuine Parts Co.⁽¹⁾		27,494	$	2,920,688

			$	2,920,688

Diversified Financial Services— 1.3%

Berkshire Hathaway, Inc., Class B⁽¹⁾⁽²⁾		22,765	$	5,156,273

			$	5,156,273


		6		See Notes to Financial Statements.

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Portfolio of Investments — continued


Security	Shares		Value

Diversified Telecommunication Services— 1.5%

AT&T, Inc.⁽¹⁾		105,323	$	4,116,023

Verizon Communications, Inc.⁽¹⁾		34,873		2,141,202

			$	6,257,225

Electric Utilities— 1.2%

Duke Energy Corp.⁽¹⁾		18,109	$	1,651,722

Edison International⁽¹⁾		20,090		1,514,987

Exelon Corp.		5,174		235,883

Pinnacle West Capital Corp.⁽¹⁾		7,168		644,618

Xcel Energy, Inc.⁽¹⁾		12,009		762,451

			$	4,809,661

Electrical Equipment— 0.6%

Emerson Electric Co.⁽¹⁾		29,903	$	2,280,403

			$	2,280,403

Energy Equipment & Services— 0.3%

Helmerich & Payne, Inc.⁽¹⁾		23,548	$	1,069,786

			$	1,069,786

Entertainment— 2.2%

Netflix, Inc.⁽¹⁾⁽²⁾		6,968	$	2,254,636

Walt Disney Co. (The)⁽¹⁾		46,840		6,774,469

			$	9,029,105

Equity Real Estate Investment Trusts (REITs)— 2.8%

Apartment Investment & Management Co., Class A⁽¹⁾		12,432	$	642,113

AvalonBay Communities, Inc.⁽¹⁾		11,002		2,307,119

Crown Castle International Corp.⁽¹⁾		7,305		1,038,406

Equity Residential⁽¹⁾		14,774		1,195,512

Host Hotels & Resorts, Inc.⁽¹⁾		58,590		1,086,845

Iron Mountain, Inc.		6,707		213,752

Kimco Realty Corp.⁽¹⁾		78,276		1,621,096

ProLogis, Inc.⁽¹⁾		22,296		1,987,465

SBA Communications Corp.⁽¹⁾		5,473		1,318,938

			$	11,411,246

Food & Staples Retailing— 0.9%

Costco Wholesale Corp.⁽¹⁾		3,700	$	1,087,504

Sysco Corp.⁽¹⁾		20,822		1,781,114

Walmart, Inc.⁽¹⁾		7,859		933,963

			$	3,802,581


Security	Shares		Value

Food Products— 1.4%

Kellogg Co.⁽¹⁾		6,243	$	431,766

Mondelez International, Inc., Class A⁽¹⁾		46,954		2,586,226

Tyson Foods, Inc., Class A⁽¹⁾		28,696		2,612,484

			$	5,630,476

Health Care Equipment & Supplies— 3.2%

Abbott Laboratories⁽¹⁾		61,114	$	5,308,362

Baxter International, Inc.⁽¹⁾		37,878		3,167,358

Stryker Corp.⁽¹⁾		18,766		3,939,734

Zimmer Biomet Holdings, Inc.⁽¹⁾		3,848		575,969

			$	12,991,423

Health Care Providers & Services— 2.8%

Centene Corp.⁽¹⁾⁽²⁾		14,424	$	906,837

CVS Health Corp.⁽¹⁾		42,389		3,149,079

UnitedHealth Group, Inc.⁽¹⁾		24,698		7,260,718

			$	11,316,634

Hotels, Restaurants & Leisure— 1.9%

Chipotle Mexican Grill, Inc.⁽²⁾		374	$	313,079

Marriott International, Inc., Class A⁽¹⁾		12,488		1,891,058

Marriott Vacations Worldwide Corp.		2,064		265,761

McDonald’s Corp.⁽¹⁾		24,279		4,797,773

Wyndham Destinations, Inc.⁽¹⁾		11,235		580,737

			$	7,848,408

Household Durables— 0.5%

Leggett & Platt, Inc.⁽¹⁾		11,383	$	578,598

Lennar Corp., Class A⁽¹⁾		18,642		1,040,037

Newell Brands, Inc.		15,292		293,912

			$	1,912,547

Household Products— 1.6%

Clorox Co. (The)⁽¹⁾		6,843	$	1,050,674

Kimberly-Clark Corp.⁽¹⁾		19,850		2,730,367

Procter & Gamble Co. (The)⁽¹⁾		21,335		2,664,742

			$	6,445,783

Industrial Conglomerates — 2.1%

3M Co.⁽¹⁾		21,663	$	3,821,786

Honeywell International, Inc.⁽¹⁾		27,158		4,806,966

			$	8,628,752


		7		See Notes to Financial Statements.

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Portfolio of Investments — continued


Security	Shares		Value

Insurance— 3.8%

Allstate Corp. (The)⁽¹⁾		31,195	$	3,507,878

Chubb, Ltd.		2,741		426,664

Cincinnati Financial Corp.⁽¹⁾		18,908		1,988,176

Lincoln National Corp.⁽¹⁾		39,818		2,349,660

Marsh & McLennan Cos., Inc.⁽¹⁾		34,246		3,815,347

MetLife, Inc.		4,629		235,940

Principal Financial Group, Inc.⁽¹⁾		29,001		1,595,055

Prudential Financial, Inc.⁽¹⁾		11,742		1,100,695

Travelers Cos., Inc. (The)		3,902		534,379

			$	15,553,794

Interactive Media & Services— 5.4%

Alphabet, Inc., Class A⁽¹⁾⁽²⁾		5,513	$	7,384,057

Alphabet, Inc., Class C⁽¹⁾⁽²⁾		5,869		7,846,970

Facebook, Inc., Class A⁽¹⁾⁽²⁾		33,400		6,855,350

			$	22,086,377

Internet & Direct Marketing Retail— 3.3%

Amazon.com, Inc.⁽¹⁾⁽²⁾		5,216	$	9,638,333

Booking Holdings, Inc.⁽¹⁾⁽²⁾		1,797		3,690,553

			$	13,328,886

IT Services— 4.5%

DXC Technology Co.		7,710	$	289,819

Fidelity National Information Services, Inc.⁽¹⁾		26,132		3,634,700

International Business Machines Corp.⁽¹⁾		11,946		1,601,242

Leidos Holdings, Inc.		1,430		139,983

Mastercard, Inc., Class A⁽¹⁾		23,717		7,081,659

VeriSign, Inc.⁽¹⁾⁽²⁾		15,482		2,983,072

Visa, Inc., Class A⁽¹⁾		13,804		2,593,771

			$	18,324,246

Life Sciences Tools & Services— 1.2%

Thermo Fisher Scientific, Inc.⁽¹⁾		14,917	$	4,846,086

			$	4,846,086

Machinery— 0.7%

Caterpillar, Inc.		2,706	$	399,622

Snap-on, Inc.⁽¹⁾		6,380		1,080,772

Stanley Black & Decker, Inc.⁽¹⁾		8,690		1,440,281

			$	2,920,675

Media— 1.5%

Comcast Corp., Class A⁽¹⁾		137,150	$	6,167,636

			$	6,167,636


Security	Shares		Value

Metals & Mining— 0.3%

Nucor Corp.⁽¹⁾		25,287	$	1,423,152

			$	1,423,152

Multi-Utilities— 2.1%

Centerpoint Energy, Inc.		14,223	$	387,861

CMS Energy Corp.⁽¹⁾		51,125		3,212,695

Dominion Energy, Inc.		1,997		165,392

DTE Energy Co.⁽¹⁾		10,342		1,343,115

NiSource, Inc.⁽¹⁾		49,999		1,391,972

Public Service Enterprise Group, Inc.⁽¹⁾		34,219		2,020,632

			$	8,521,667

Multiline Retail— 0.2%

Kohl’s Corp.⁽¹⁾		14,657	$	746,774

			$	746,774

Oil, Gas & Consumable Fuels— 4.1%

Chevron Corp.⁽¹⁾		42,470	$	5,118,059

EOG Resources, Inc.⁽¹⁾		25,247		2,114,689

Exxon Mobil Corp.⁽¹⁾		35,735		2,493,588

Marathon Petroleum Corp.⁽¹⁾		31,956		1,925,349

Phillips 66⁽¹⁾		24,334		2,711,051

Pioneer Natural Resources Co.⁽¹⁾		6,629		1,003,432

Williams Cos., Inc. (The)⁽¹⁾		58,161		1,379,579

			$	16,745,747

Personal Products— 0.2%

Estee Lauder Cos., Inc. (The), Class A⁽¹⁾		3,326	$	686,952

			$	686,952

Pharmaceuticals— 4.9%

Bristol-Myers Squibb Co.⁽¹⁾		77,658	$	4,984,867

Johnson & Johnson⁽¹⁾		44,237		6,452,851

Merck & Co., Inc.⁽¹⁾		63,657		5,789,604

Pfizer, Inc.⁽¹⁾		67,321		2,637,637

			$	19,864,959

Professional Services— 0.2%

ManpowerGroup, Inc.		1,193	$	115,840

Robert Half International, Inc.⁽¹⁾		13,943		880,501

			$	996,341

Real Estate Management & Development— 0.1%

CBRE Group, Inc., Class A⁽²⁾		8,158	$	500,004

			$	500,004


		8		See Notes to Financial Statements.

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Portfolio of Investments — continued


Security	Shares		Value

Road & Rail— 1.5%

J.B. Hunt Transport Services, Inc.		3,521	$	411,182

Kansas City Southern⁽¹⁾		11,539		1,767,313

Norfolk Southern Corp.⁽¹⁾		19,129		3,713,513

			$	5,892,008

Semiconductors & Semiconductor Equipment— 4.8%

Advanced Micro Devices, Inc.⁽¹⁾⁽²⁾		63,537	$	2,913,807

Analog Devices, Inc.⁽¹⁾		16,160		1,920,454

Applied Materials, Inc.⁽¹⁾		15,313		934,706

Broadcom, Inc.⁽¹⁾		8,718		2,755,062

Intel Corp.⁽¹⁾		38,282		2,291,178

NVIDIA Corp.⁽¹⁾		21,778		5,124,363

QUALCOMM, Inc.⁽¹⁾		16,403		1,447,237

Teradyne, Inc.⁽¹⁾		28,870		1,968,645

			$	19,355,452

Software— 6.8%

Microsoft Corp.⁽¹⁾		136,405	$	21,511,069

Oracle Corp.⁽¹⁾		86,693		4,592,995

salesforce.com, inc.⁽¹⁾⁽²⁾		9,563		1,555,326

			$	27,659,390

Specialty Retail— 2.3%

Advance Auto Parts, Inc.⁽¹⁾		3,365	$	538,938

Home Depot, Inc. (The)⁽¹⁾		30,411		6,641,154

Tiffany & Co.⁽¹⁾		14,641		1,956,770

			$	9,136,862

Technology Hardware, Storage & Peripherals— 5.4%

Apple, Inc.⁽¹⁾		74,239	$	21,800,282

			$	21,800,282

Textiles, Apparel & Luxury Goods— 0.8%

NIKE, Inc., Class B⁽¹⁾		30,243	$	3,063,918

			$	3,063,918

Tobacco— 1.0%

Philip Morris International, Inc.⁽¹⁾		47,032	$	4,001,953

			$	4,001,953


Security	Shares		Value

Trading Companies & Distributors— 0.2%

Fastenal Co.⁽¹⁾		20,160	$	744,912

			$	744,912

Total Common Stocks — 101.2% (identified cost $109,687,930)			$	410,237,673

Total Written Call Options — (1.5)% (premiums received $4,201,400)			$	(6,153,900	)

Other Assets, Less Liabilities — 0.3%			$	1,418,805

Net Assets — 100.0%			$	405,502,578

The percentage shown for each investment category in the Portfolio of Investments is based on net assets.

⁽¹⁾	Security (or a portion thereof) has been pledged as collateral for written options.

⁽²⁾	Non-income producing security.

⁽³⁾	Amount is less than 0.05%.


		9		See Notes to Financial Statements.

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Portfolio of Investments — continued


Written Call Options— (1.5)%
Exchange-Traded Options— (1.5)%

Description	Number of Contracts		Notional Amount		Exercise Price		Expiration Date		Value

S&P 500 Index		102	$	32,953,956	$	3,150		1/3/20	$	(829,770	)

S&P 500 Index		102		32,953,956		3,150		1/6/20		(838,440	)

S&P 500 Index		102		32,953,956		3,135		1/8/20		(1,004,190	)

S&P 500 Index		101		32,630,878		3,165		1/10/20		(732,250	)

S&P 500 Index		101		32,630,878		3,200		1/13/20		(453,995	)

S&P 500 Index		101		32,630,878		3,200		1/15/20		(482,275	)

S&P 500 Index		100		32,307,800		3,225		1/17/20		(334,500	)

S&P 500 Index		100		32,307,800		3,235		1/21/20		(289,500	)

S&P 500 Index		100		32,307,800		3,245		1/22/20		(246,500	)

S&P 500 Index		99		31,984,722		3,250		1/24/20		(245,025	)

S&P 500 Index		99		31,984,722		3,250		1/27/20		(258,885	)

S&P 500 Index		99		31,984,722		3,225		1/29/20		(438,570	)

Total									$	(6,153,900	)


		10		See Notes to Financial Statements.

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Statement of Assets and Liabilities


Assets	December 31, 2019

Unaffiliated investments, at value (identified cost, $109,687,930)	$	410,237,673

Cash		1,029,323

Dividends receivable		458,202

Receivable for investments sold		1,263,395

Receivable for premiums on written options		398,555

Receivable from the transfer agent		49,903

Total assets	$	413,437,051

Liabilities

Written options outstanding, at value (premiums received, $4,201,400)	$	6,153,900

Payable for closed written options		1,188,110

Payable to affiliates:

Investment adviser fee		343,453

Trustees’ fees		4,970

Accrued expenses		244,040

Total liabilities	$	7,934,473

Net Assets	$	405,502,578

Sources of Net Assets

Common shares, $0.01 par value, unlimited number of shares authorized, 26,574,384 shares issued and outstanding	$	265,744

Additional paid-in capital		110,034,717

Distributable earnings		295,202,117

Net Assets	$	405,502,578

Net Asset Value

($405,502,578 ÷ 26,574,384 common shares issued and outstanding)	$	15.26


		11		See Notes to Financial Statements.

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Statement of Operations


Investment Income	Year Ended December 31, 2019

Dividends	$	8,262,739

Total investment income	$	8,262,739

Expenses

Investment adviser fee	$	3,928,252

Trustees’ fees and expenses		21,082

Custodian fee		166,313

Transfer and dividend disbursing agent fees		18,109

Legal and accounting services		64,083

Printing and postage		147,409

Miscellaneous		32,900

Total expenses	$	4,378,148

Net investment income	$	3,884,591

Realized and Unrealized Gain (Loss)

Net realized gain (loss) —

Investment transactions	$	47,299,787

Written options		(38,918,529	)

Net realized gain	$	8,381,258

Change in unrealized appreciation (depreciation) —

Investments	$	57,343,384

Written options		(2,777,719	)

Net change in unrealized appreciation (depreciation)	$	54,565,665

Net realized and unrealized gain	$	62,946,923

Net increase in net assets from operations	$	66,831,514


		12		See Notes to Financial Statements.

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Statements of Changes in Net Assets


	Year Ended December 31,
Increase (Decrease) in Net Assets	2019			2018

From operations —

Net investment income	$	3,884,591		$	3,860,387

Net realized gain		8,381,258			8,305,590

Net change in unrealized appreciation (depreciation)		54,565,665			(39,687,176	)

Net increase (decrease) in net assets from operations	$	66,831,514		$	(27,521,199	)

Distributions to shareholders	$	(14,995,584	)	$	(6,589,683	)

Tax return of capital to shareholders	$	(19,417,933	)	$	(27,248,855	)

Capital share transactions —

Proceeds from shelf offering, net of offering costs (see Note 5)	$	—		$	15,524,044

Reinvestment of distributions		575,254			485,636

Net increase in net assets from capital share transactions	$	575,254		$	16,009,680

Net increase (decrease) in net assets	$	32,993,251		$	(45,350,057	)

Net Assets

At beginning of year	$	372,509,327		$	417,859,384

At end of year	$	405,502,578		$	372,509,327


		13		See Notes to Financial Statements.

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Financial Highlights


	Year Ended December 31,
	2019			2018			2017			2016			2015

Net asset value — Beginning of year	$	14.040		$	16.350		$	15.500		$	15.520		$	16.310

Income (Loss) From Operations

Net investment income⁽¹⁾	$	0.146		$	0.148		$	0.156		$	0.189		$	0.198

Net realized and unrealized gain (loss)		2.370			(1.172	)		1.980			1.087			0.308

Total income (loss) from operations	$	2.516		$	(1.024	)	$	2.136		$	1.276		$	0.506

Less Distributions

From net investment income	$	(0.143	)	$	(0.144	)	$	(0.150	)	$	(0.177	)	$	(0.189	)

From net realized gain		(0.422	)		(0.108	)		—			(0.482	)		(0.368	)

Tax return of capital		(0.731	)		(1.044	)		(1.146	)		(0.637	)		(0.739	)

Total distributions	$	(1.296	)	$	(1.296	)	$	(1.296	)	$	(1.296	)	$	(1.296	)

Premium from common shares sold through shelf offering (see Note 5)⁽¹⁾	$	—		$	0.010		$	0.010		$	—		$	—

Net asset value — End of year	$	15.260		$	14.040		$	16.350		$	15.500		$	15.520

Market value — End of year	$	16.400		$	13.450		$	16.730		$	16.520		$	16.690

Total Investment Return on Net Asset Value⁽²⁾		18.50	%		(6.69	)%		14.30	%		8.68	%		3.21	%

Total Investment Return on Market Value⁽²⁾		32.93	%		(12.65	)%		9.73	%		7.63	%		13.92	%

Ratios/Supplemental Data

Net assets, end of year (000’s omitted)	$	405,503		$	372,509		$	417,859		$	382,921		$	382,897

Ratios (as a percentage of average daily net assets):

Expenses⁽³⁾		1.11	%		1.11	%		1.11	%		1.12	%		1.11	%

Net investment income		0.99	%		0.94	%		0.97	%		1.25	%		1.23	%

Portfolio Turnover		2	%		4	%		1	%		6	%		7	%

⁽¹⁾	Computed using average shares outstanding.

⁽²⁾	Returns are historical and are calculated by determining the percentage change in net asset value or market value with all distributions reinvested. Distributions are assumed to be reinvested at prices obtained under the Fund’s dividend reinvestment plan.

⁽³⁾	Excludes the effect of custody fee credits, if any, of less than 0.005%. Effective September 1, 2015, custody fee credits, which were earned on cash deposit balances, were discontinued by the custodian.


		14		See Notes to Financial Statements.

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Notes to Financial Statements

1 Significant Accounting Policies

Eaton Vance Tax-Managed Buy-Write Income Fund (the Fund) is a Massachusetts business trust registered under the Investment Company Act of 1940, as amended (the 1940 Act), as a diversified, closed-end management investment company. The Fund’s primary investment objective is to provide current income and gains, with a secondary objective of capital appreciation.

The following is a summary of significant accounting policies of the Fund. The policies are in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP). The Fund is an investment company and follows accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946.

A Investment Valuation — The following methodologies are used to determine the market value or fair value of investments.

Equity Securities. Equity securities listed on a U.S. securities exchange generally are valued at the last sale or closing price on the day of valuation or, if no sales took place on such date, at the mean between the closing bid and ask prices on the exchange where such securities are principally traded. Equity securities listed on the NASDAQ Global or Global Select Market generally are valued at the NASDAQ official closing price. Unlisted or listed securities for which closing sales prices or closing quotations are not available are valued at the mean between the latest available bid and ask prices.

Derivatives. U.S. exchange-traded options are valued at the mean between the bid and ask prices at valuation time as reported by the Options Price Reporting Authority. Non U.S. exchange-traded options and over-the-counter options are valued by a third party pricing service using techniques that consider factors including the value of the underlying instrument, the volatility of the underlying instrument and the period of time until option expiration.

Fair Valuation. Investments for which valuations or market quotations are not readily available or are deemed unreliable are valued at fair value using methods determined in good faith by or at the direction of the Trustees of the Fund in a manner that most fairly reflects the security’s “fair value”, which is the amount that the Fund might reasonably expect to receive for the security upon its current sale in the ordinary course. Each such determination is based on a consideration of relevant factors, which are likely to vary from one pricing context to another. These factors may include, but are not limited to, the type of security, the existence of any contractual restrictions on the security’s disposition, the price and extent of public trading in similar securities of the issuer or of comparable companies or entities, quotations or relevant information obtained from broker/dealers or other market participants, information obtained from the issuer, analysts, and/or the appropriate stock exchange (for exchange-traded securities), an analysis of the company’s or entity’s financial statements, and an evaluation of the forces that influence the issuer and the market(s) in which the security is purchased and sold.

B Investment Transactions — Investment transactions for financial statement purposes are accounted for on a trade date basis. Realized gains and losses on investments sold are determined on the basis of identified cost.

C Income — Dividend income is recorded on the ex-dividend date for dividends received in cash and/or securities.

D Federal Taxes — The Fund’s policy is to comply with the provisions of the Internal Revenue Code applicable to regulated investment companies and to distribute to shareholders each year substantially all of its net investment income, and all or substantially all of its net realized capital gains. Accordingly, no provision for federal income or excise tax is necessary.

As of December 31, 2019, the Fund had no uncertain tax positions that would require financial statement recognition, de-recognition, or disclosure. The Fund files a U.S. federal income tax return annually after its fiscal year-end, which is subject to examination by the Internal Revenue Service for a period of three years from the date of filing.

E Use of Estimates — The preparation of the financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of income and expense during the reporting period. Actual results could differ from those estimates.

F Indemnifications — Under the Fund’s organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the Fund. Under Massachusetts law, if certain conditions prevail, shareholders of a Massachusetts business trust (such as the Fund) could be deemed to have personal liability for the obligations of the Fund. However, the Fund’s Declaration of Trust contains an express disclaimer of liability on the part of Fund shareholders and the By-laws provide that the Fund shall assume, upon request by the shareholder, the defense on behalf of any Fund shareholders. Moreover, the By-laws also provide for indemnification out of Fund property of any shareholder held personally liable solely by reason of being or having been a shareholder for all loss or expense arising from such liability. Additionally, in the normal course of business, the Fund enters into agreements with service providers that may contain indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown as this would involve future claims that may be made against the Fund that have not yet occurred.

G Written Options — Upon the writing of a call or a put option, the premium received by the Fund is included in the Statement of Assets and Liabilities as a liability. The amount of the liability is subsequently marked-to-market to reflect the current market value of the option written, in accordance with the Fund’s policies on investment valuations discussed above. Premiums received from writing options which expire are treated as realized gains. Premiums received from writing options which are exercised or are closed are added to or offset against the proceeds or amount paid on the transaction to determine the realized gain or loss. When an index option is exercised, the Fund is required to deliver an amount of cash determined by the excess of the exercise price of the option over the value of the index (in the case of a put) or the excess of the value of the index over the exercise price of the option (in the case of a call) at contract termination. If a put option on a security is exercised, the premium reduces the cost basis of the securities purchased by the Fund.


		15

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Notes to Financial Statements — continued

The Fund, as a writer of an option, may have no control over whether the underlying securities or other assets may be sold (call) or purchased (put) and, as a result, bears the market risk of an unfavorable change in the price of the securities or other assets underlying the written option. The Fund may also bear the risk of not being able to enter into a closing transaction if a liquid secondary market does not exist.

2 Distributions to Shareholders and Income Tax Information

Subject to its Managed Distribution Plan, the Fund makes monthly distributions from its cash available for distribution, which consists of the Fund’s dividends and interest income after payment of Fund expenses, net option premiums and net realized and unrealized gains on stock investments. The Fund intends to distribute all or substantially all of its net realized capital gains. Distributions are recorded on the ex-dividend date. Distributions to shareholders are determined in accordance with income tax regulations, which may differ from U.S. GAAP. As required by U.S. GAAP, only distributions in excess of tax basis earnings and profits are reported in the financial statements as a return of capital. Permanent differences between book and tax accounting relating to distributions are reclassified to paid-in capital. For tax purposes, distributions from short-term capital gains are considered to be from ordinary income. Distributions in any year may include a substantial return of capital component.

The tax character of distributions declared for the years ended December 31, 2019 and December 31, 2018 was as follows:


	Year Ended December 31,
	2019		2018

Ordinary income	$	3,792,661	$	3,775,330

Long-term capital gains	$	11,202,923	$	2,814,353

Tax return of capital	$	19,417,933	$	27,248,855

During the year ended December 31, 2019, distributable earnings was increased by $8,299 and paid-in capital was decreased by $8,299 due to differences between book and tax accounting. These reclassifications had no effect on the net assets or net asset value per share of the Fund.

As of December 31, 2019, the components of distributable earnings (accumulated loss) on a tax basis were as follows:



Post October capital losses	$	(5,492,973	)

Net unrealized appreciation	$	300,695,090

At December 31, 2019, the Fund had a net capital loss of $5,492,973 attributable to security transactions incurred after October 31, 2019 that it has elected to defer. This net capital loss is treated as arising on the first day of the Fund’s taxable year ending December 31, 2020.

The cost and unrealized appreciation (depreciation) of investments, including open derivative contracts, of the Fund at December 31, 2019, as determined on a federal income tax basis, were as follows:



Aggregate cost	$	109,542,583

Gross unrealized appreciation	$	300,698,214

Gross unrealized depreciation		(3,124	)

Net unrealized appreciation	$	300,695,090

3 Investment Adviser Fee and Other Transactions with Affiliates

The investment adviser fee is earned by Eaton Vance Management (EVM) as compensation for management and investment advisory services rendered to the Fund. The fee is computed at an annual rate of 1.00% of the Fund’s average daily gross assets and is payable monthly. Gross assets as referred to herein represent net assets plus obligations attributable to investment leverage, if any. For the year ended December 31, 2019, the Fund’s investment adviser fee amounted to $3,928,252. Pursuant to a sub-advisory agreement, EVM has delegated a portion of the investment management to Parametric Portfolio Associates LLC (Parametric), a wholly-owned indirect subsidiary of Eaton Vance Corp. EVM pays Parametric a portion of its investment adviser fee for sub-advisory services provided to the Fund. EVM also serves as administrator of the Fund, but receives no compensation.

Trustees and officers of the Fund who are members of EVM’s organization receive remuneration for their services to the Fund out of the investment adviser fee. Trustees of the Fund who are not affiliated with EVM may elect to defer receipt of all or a percentage of their annual fees in accordance with the terms


		16

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Notes to Financial Statements — continued

of the Trustees Deferred Compensation Plan. For the year ended December 31, 2019, no significant amounts have been deferred. Certain officers and Trustees of the Fund are officers of EVM.

4 Purchases and Sales of Investments

Purchases and sales of investments, other than short-term obligations, aggregated $6,673,045 and $74,502,710, respectively, for the year ended December 31, 2019.

5 Common Shares of Beneficial Interest and Shelf Offering

Common shares issued by the Fund pursuant to its dividend reinvestment plan for the years ended December 31, 2019 and December 31, 2018 were 38,493 and 30,675, respectively.

In August 2012, the Board of Trustees initially approved a share repurchase program for the Fund. Pursuant to the reauthorization of the share repurchase program by the Board of Trustees in March 2019, the Fund is authorized to repurchase up to 10% of its common shares outstanding as of the last day of the prior calendar year at market prices when shares are trading at a discount to net asset value. The share repurchase program does not obligate the Fund to purchase a specific amount of shares. There were no repurchases of common shares by the Fund for the years ended December 31, 2019 and December 31, 2018.

Pursuant to a registration statement filed with and declared effective on April 5, 2017 by the SEC, the Fund is authorized to issue up to an additional 2,965,949 common shares through an equity shelf offering program (the “shelf offering”). Under the shelf offering, the Fund, subject to market conditions, may raise additional capital from time to time and in varying amounts and offering methods at a net price at or above the Fund’s net asset value per common share.

During the year ended December 31, 2019, there were no common shares sold by the Fund pursuant to its shelf offering. During the year ended December 31, 2018, the Fund sold 952,640 common shares and received proceeds (net of offering costs) of $15,524,044 through its shelf offering. The net proceeds in excess of the net asset value of the shares sold were $256,184. Offering costs (other than the applicable sales commissions) incurred in connection with the shelf offering were borne directly by EVM.

6 Financial Instruments

The Fund may trade in financial instruments with off-balance sheet risk in the normal course of its investing activities. These financial instruments may include written options and may involve, to a varying degree, elements of risk in excess of the amounts recognized for financial statement purposes. The notional or contractual amounts of these instruments represent the investment the Fund has in particular classes of financial instruments and do not necessarily represent the amounts potentially subject to risk. The measurement of the risks associated with these instruments is meaningful only when all related and offsetting transactions are considered. A summary of obligations under these financial instruments at December 31, 2019 is included in the Portfolio of Investments. At December 31, 2019, the Fund had sufficient cash and/or securities to cover commitments under these contracts.

The Fund is subject to equity price risk in the normal course of pursuing its investment objectives. The Fund writes index call options above the current value of the index to generate premium income. In writing index call options, the Fund in effect, sells potential appreciation in the value of the applicable index above the exercise price in exchange for the option premium received. The Fund retains the risk of loss, minus the premium received, should the value of the underlying index decline.

The fair value of open derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) and whose primary underlying risk exposure is equity price risk at December 31, 2019 was as follows:


	Fair Value
Derivative	Asset Derivative		Liability Derivative⁽¹⁾

Written options	$	—	$	(6,153,900	)

⁽¹⁾	Statement of Assets and Liabilities location: Written options outstanding, at value.


		17

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Notes to Financial Statements — continued

The effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) on the Statement of Operations and whose primary underlying risk exposure is equity price risk for the year ended December 31, 2019 was as follows:


Derivative	Realized Gain (Loss) on Derivatives Recognized in Income⁽¹⁾			Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income⁽²⁾

Written options	$	(38,918,529	)	$	(2,777,719	)

⁽¹⁾	Statement of Operations location: Net realized gain (loss) – Written options.

⁽²⁾	Statement of Operations location: Change in unrealized appreciation (depreciation) – Written options.

The average number of written options contracts outstanding during the year ended December 31, 2019, which is indicative of the volume of this derivative type, was 1,288 contracts.

7 Fair Value Measurements

Under generally accepted accounting principles for fair value measurements, a three-tier hierarchy to prioritize the assumptions, referred to as inputs, is used in valuation techniques to measure fair value. The three-tier hierarchy of inputs is summarized in the three broad levels listed below.

•

Level 1 – quoted prices in active markets for identical investments

•

Level 2 – other significant observable inputs (including quoted prices for similar investments, interest rates, prepayment speeds, credit risk, etc.)

•

Level 3 – significant unobservable inputs (including a fund’s own assumptions in determining the fair value of investments)

In cases where the inputs used to measure fair value fall in different levels of the fair value hierarchy, the level disclosed is determined based on the lowest level input that is significant to the fair value measurement in its entirety. The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities.

At December 31, 2019, the hierarchy of inputs used in valuing the Fund’s investments and open derivative instruments, which are carried at value, were as follows:


Asset Description	Level 1			Level 2		Level 3		Total

Common Stocks	$	410,237,673	*	$	—	$	—	$	410,237,673

Total Investments	$	410,237,673		$	—	$	—	$	410,237,673

Liability Description

Written Call Options	$	(6,153,900	)	$	—	$	—	$	(6,153,900	)

Total	$	(6,153,900	)	$	—	$	—	$	(6,153,900	)

*	The level classification by major category of investments is the same as the category presentation in the Portfolio of Investments.


		18

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Report of Independent Registered Public Accounting Firm

To the Trustees and Shareholders of Eaton Vance Tax-Managed Buy-Write Income Fund:

Opinion on the Financial Statements and Financial Highlights

We have audited the accompanying statement of assets and liabilities of Eaton Vance Tax-Managed Buy-Write Income Fund (the “Fund”), including the portfolio of investments, as of December 31, 2019, the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, the financial highlights for each of the five years in the period then ended, and the related notes. In our opinion, the financial statements and financial highlights present fairly, in all material respects, the financial position of the Fund as of December 31, 2019, and the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and the financial highlights for each of the five years in the period then ended, in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion

These financial statements and financial highlights are the responsibility of the Fund’s management. Our responsibility is to express an opinion on the Fund’s financial statements and financial highlights based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Fund 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 and financial highlights are free of material misstatement, whether due to error or fraud. The Fund is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Fund’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements and financial highlights, 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 and financial highlights. 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 and financial highlights. Our procedures included confirmation of securities owned as of December 31, 2019, by correspondence with the custodian and brokers; when replies were not received from brokers, we performed other auditing procedures. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP

Boston, Massachusetts

February 18, 2020

We have served as the auditor of one or more Eaton Vance investment companies since 1959.


		19

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Federal Tax Information (Unaudited)

The Form 1099-DIV you received in February 2020 showed the tax status of all distributions paid to your account in calendar year 2019. Shareholders are advised to consult their own tax adviser with respect to the tax consequences of their investment in the Fund. As required by the Internal Revenue Code and/or regulations, shareholders must be notified regarding the status of qualified dividend income for individuals, the dividends received deduction for corporations and capital gains dividends.

Qualified Dividend Income. For the fiscal year ended December 31, 2019, the Fund designates approximately $7,889,870, or up to the maximum amount of such dividends allowable pursuant to the Internal Revenue Code, as qualified dividend income eligible for the reduced tax rate of 15%.

Dividends Received Deduction. Corporate shareholders are generally entitled to take the dividends received deduction on the portion of the Fund’s dividend distribution that qualifies under tax law. For the Fund’s fiscal 2019 ordinary income dividends, 100% qualifies for the corporate dividends received deduction.

Capital Gains Dividends. The Fund hereby designates as a capital gain dividend with respect to the taxable year ended December 31, 2019, $11,202,923 or, if subsequently determined to be different, the net capital gain of such year.


		20

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Dividend Reinvestment Plan

The Fund offers a dividend reinvestment plan (Plan) pursuant to which shareholders may elect to have distributions automatically reinvested in common shares (Shares) of the Fund. You may elect to participate in the Plan by completing the Dividend Reinvestment Plan Application Form. If you do not participate, you will receive all distributions in cash paid by check mailed directly to you by American Stock Transfer & Trust Company, LLC (AST) as dividend paying agent. On the distribution payment date, if the NAV per Share is equal to or less than the market price per Share plus estimated brokerage commissions, then new Shares will be issued. The number of Shares shall be determined by the greater of the NAV per Share or 95% of the market price. Otherwise, Shares generally will be purchased on the open market by AST, the Plan agent (Agent). Distributions subject to income tax (if any) are taxable whether or not Shares are reinvested.

If your Shares are in the name of a brokerage firm, bank, or other nominee, you can ask the firm or nominee to participate in the Plan on your behalf. If the nominee does not offer the Plan, you will need to request that the Fund’s transfer agent re-register your Shares in your name or you will not be able to participate.

The Agent’s service fee for handling distributions will be paid by the Fund. Plan participants will be charged their pro rata share of brokerage commissions on all open-market purchases.

Plan participants may withdraw from the Plan at any time by writing to the Agent at the address noted on the following page. If you withdraw, you will receive Shares in your name for all Shares credited to your account under the Plan. If a participant elects by written notice to the Agent to sell part or all of his or her Shares and remit the proceeds, the Agent is authorized to deduct a $5.00 fee plus brokerage commissions from the proceeds.

If you wish to participate in the Plan and your Shares are held in your own name, you may complete the form on the following page and deliver it to the Agent. Any inquiries regarding the Plan can be directed to the Agent at 1-866-439-6787.


		21

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Application for Participation in Dividend Reinvestment Plan

This form is for shareholders who hold their common shares in their own names. If your common shares are held in the name of a brokerage firm, bank, or other nominee, you should contact your nominee to see if it will participate in the Plan on your behalf. If you wish to participate in the Plan, but your brokerage firm, bank, or nominee is unable to participate on your behalf, you should request that your common shares be re-registered in your own name which will enable your participation in the Plan.

The following authorization and appointment is given with the understanding that I may terminate it at any time by terminating my participation in the Plan as provided in the terms and conditions of the Plan.

Please print exact name on account

Shareholder signature Date

Please sign exactly as your common shares are registered. All persons whose names appear on the share certificate must sign.

YOU SHOULD NOT RETURN THIS FORM IF YOU WISH TO RECEIVE YOUR DISTRIBUTIONS IN CASH. THIS IS NOT A PROXY.

This authorization form, when signed, should be mailed to the following address:

Eaton Vance Tax-Managed Buy-Write Income Fund

c/o American Stock Transfer & Trust Company, LLC

P.O. Box 922

Wall Street Station

New York, NY 10269-0560


		22

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Management and Organization

Fund Management. The Trustees of Eaton Vance Tax-Managed Buy-Write Income Fund (the Fund) are responsible for the overall management and supervision of the Fund’s affairs. The Trustees and officers of the Fund are listed below. Except as indicated, each individual has held the office shown or other offices in the same company for the last five years. The “noninterested Trustees” consist of those Trustees who are not “interested persons” of the Fund, as that term is defined under the 1940 Act. The business address of each Trustee and officer is Two International Place, Boston, Massachusetts 02110. As used below, “EVC” refers to Eaton Vance Corp., “EV” refers to Eaton Vance, Inc., “EVM” refers to Eaton Vance Management, “BMR” refers to Boston Management and Research and “EVD” refers to Eaton Vance Distributors, Inc. EVC and EV are the corporate parent and trustee, respectively, of EVM and BMR. EVD is a wholly-owned subsidiary of EVC. Each officer affiliated with Eaton Vance may hold a position with other Eaton Vance affiliates that is comparable to his or her position with EVM listed below. Each Trustee oversees 159 portfolios in the Eaton Vance Complex (including all master and feeder funds in a master feeder structure). Each officer serves as an officer of certain other Eaton Vance funds.


Name and Year of Birth	Position(s) with the Fund	Term Expiring; Trustee Since⁽¹⁾	Principal Occupation(s) and Directorships During Past Five Years and Other Relevant Experience

Interested Trustee

Thomas E. Faust Jr. 1958	Class I Trustee	Until 2021. Trustee since 2007.	Chairman, Chief Executive Officer and President of EVC, Director and President of EV, Chief Executive Officer and President of EVM and BMR, and Director of EVD. Trustee and/or officer of 159 registered investment companies. Mr. Faust is an interested person because of his positions with EVM, BMR, EVD, EVC and EV, which are affiliates of the Fund. Directorships in the Last Five Years. Director of EVC and Hexavest Inc. (investment management firm).

Noninterested Trustees

Mark R. Fetting 1954	Class III Trustee	Until 2020. Trustee since 2016.	Private investor. Formerly held various positions at Legg Mason, Inc. (investment management firm) (2000-2012), including President, Chief Executive Officer, Director and Chairman (2008-2012), Senior Executive Vice President (2004-2008) and Executive Vice President (2001-2004). Formerly, President of Legg Mason family of funds (2001-2008). Formerly, Division President and Senior Officer of Prudential Financial Group, Inc. and related companies (investment management firm) (1991-2000). Other Directorships in the Last Five Years. None.

Cynthia E. Frost 1961	Class I Trustee	Until 2021. Trustee since 2014.	Private investor. Formerly, Chief Investment Officer of Brown University (university endowment) (2000-2012). Formerly, Portfolio Strategist for Duke Management Company (university endowment manager) (1995-2000). Formerly, Managing Director, Cambridge Associates (investment consulting company) (1989-1995). Formerly, Consultant, Bain and Company (management consulting firm) (1987-1989). Formerly, Senior Equity Analyst, BA Investment Management Company (1983-1985). Other Directorships in the Last Five Years. None.

George J. Gorman 1952	Class II Trustee	Until 2022. Trustee since 2014.	Principal at George J. Gorman LLC (consulting firm). Formerly, Senior Partner at Ernst & Young LLP (a registered public accounting firm) (1974-2009). Other Directorships in the Last Five Years. Formerly, Trustee of the BofA Funds Series Trust (11 funds) (2011-2014) and of the Ashmore Funds (9 funds) (2010-2014).

Valerie A. Mosley 1960	Class III Trustee	Until 2020. Trustee since 2014.	Chairwoman and Chief Executive Officer of Valmo Ventures (a consulting and investment firm). Former Partner and Senior Vice President, Portfolio Manager and Investment Strategist at Wellington Management Company, LLP (investment management firm) (1992-2012). Former Chief Investment Officer, PG Corbin Asset Management (1990-1992). Formerly worked in institutional corporate bond sales at Kidder Peabody (1986-1990). Other Directorships in the Last Five Years. Director of Envestnet, Inc. (provider of intelligent systems for wealth management and financial wellness) (since 2018). Director of Dynex Capital, Inc. (mortgage REIT) (since 2013).

William H. Park 1947	Chairperson of the Board and Class II Trustee	Until 2022. Chairperson of the Board since 2016 and Trustee since 2003.	Private investor. Formerly, Consultant (management and transactional) (2012-2014). Formerly, Chief Financial Officer, Aveon Group L.P. (investment management firm) (2010-2011). Formerly, Vice Chairman, Commercial Industrial Finance Corp. (specialty finance company) (2006-2010). Formerly, President and Chief Executive Officer, Prizm Capital Management, LLC (investment management firm) (2002-2005). Formerly, Executive Vice President and Chief Financial Officer, United Asset Management Corporation (investment management firm) (1982-2001). Formerly, Senior Manager, Price Waterhouse (now PricewaterhouseCoopers) (a registered public accounting firm) (1972-1981). Other Directorships in the Last Five Years. None.


		23

Eaton Vance

Tax-Managed Buy-Write Income Fund

December 31, 2019

Management and Organization — continued


Name and Year of Birth	Position(s) with the Fund	Term Expiring; Trustee Since⁽¹⁾	Principal Occupation(s) and Directorships During Past Five Years and Other Relevant Experience

Noninterested Trustees (continued)

Helen Frame Peters 1948	Class III Trustee	Until 2020. Trustee since 2008.	Professor of Finance, Carroll School of Management, Boston College. Formerly, Dean, Carroll School of Management, Boston College (2000-2002). Formerly, Chief Investment Officer, Fixed Income, Scudder Kemper Investments (investment management firm) (1998-1999). Formerly, Chief Investment Officer, Equity and Fixed Income, Colonial Management Associates (investment management firm) (1991-1998). Other Directorships in the Last Five Years. None.

Keith Quinton 1958	Class II Trustee	Until 2022. Trustee since 2018.	Independent Investment Committee Member at New Hampshire Retirement System (since 2017). Advisory Committee member at Northfield Information Services, Inc. (risk management analytics provider) (since 2016). Formerly, Portfolio Manager and Senior Quantitative Analyst at Fidelity Investments (investment management firm) (2001-2014). Other Directorships in the Last Five Years. Director of New Hampshire Municipal Bond Bank (since 2016).

Marcus L. Smith 1966	Class III Trustee	Until 2020. Trustee since 2018.	Member of Posse Boston Advisory Board (foundation) (since 2015). Trustee at University of Mount Union (since 2008). Formerly, Portfolio Manager at MFS Investment Management (investment management firm) (1994-2017). Other Directorships in the Last Five Years. Director of MSCI Inc. (global provider of investment decision support tools) (since 2017). Formerly, Director of DCT Industrial Trust Inc. (logistics real estate company) (2017-2018).

Susan J. Sutherland 1957	Class II Trustee	Until 2022. Trustee since 2015.	Private investor. Formerly, Associate, Counsel and Partner at Skadden, Arps, Slate, Meagher & Flom LLP (law firm) (1982-2013). Other Directorships in the Last Five Years. Formerly, Director of Montpelier Re Holdings Ltd. (global provider of customized insurance and reinsurance products) (2013-2015).

Scott E. Wennerholm 1959	Class I Trustee	Until 2021. Trustee since 2016.	Formerly, Trustee at Wheelock College (postsecondary institution) (2012-2018). Formerly, Consultant at GF Parish Group (executive recruiting firm) (2016-2017). Formerly, Chief Operating Officer and Executive Vice President at BNY Mellon Asset Management (investment management firm) (2005-2011). Formerly, Chief Operating Officer and Chief Financial Officer at Natixis Global Asset Management (investment management firm) (1997-2004). Formerly, Vice President at Fidelity Investments Institutional Services (investment management firm) (1994-1997). Other Directorships in the Last Five Years. None.


Name and Year of Birth	Position(s) with the Fund	Officer Since⁽²⁾	Principal Occupation(s) During Past Five Years

Principal Officers who are not Trustees

Edward J. Perkin 1972	President	2014	Vice President and Chief Equity Investment Officer of EVM and BMR. Also Vice President of Calvert Research and Management (“CRM”) since 2016.

Maureen A. Gemma 1960	Vice President, Secretary and Chief Legal Officer	2005	Vice President of EVM and BMR. Also Vice President of CRM.

James F. Kirchner 1967	Treasurer	2007	Vice President of EVM and BMR. Also Vice President of CRM.

Richard F. Froio 1968	Chief Compliance Officer	2017	Vice President of EVM and BMR since 2017. Formerly Deputy Chief Compliance Officer (Adviser/Funds) and Chief Compliance Officer (Distribution) at PIMCO (2012-2017) and Managing Director at BlackRock/Barclays Global Investors (2009-2012).

⁽¹⁾

Year first appointed to serve as Trustee for a fund in the Eaton Vance family of funds. Each Trustee has served continuously since appointment unless indicated otherwise. Each Trustee holds office until the annual meeting for the year in which his or her term expires and until his or her successor is elected and qualified, subject to a prior death, resignation, retirement, disqualification or removal.

⁽²⁾

Year first elected to serve as officer of a fund in the Eaton Vance family of funds when the officer has served continuously. Otherwise, year of most recent election as an officer of a fund in the Eaton Vance family of funds. Titles may have changed since initial election. Each officer serves until his or her successor is elected.


		24

Eaton Vance Funds

IMPORTANT NOTICES

Privacy. The Eaton Vance organization is committed to ensuring your financial privacy. Each entity listed below has adopted a privacy policy and procedures (“Privacy Program”) Eaton Vance believes is reasonably designed to protect your personal information and to govern when and with whom Eaton Vance may share your personal information.

•

At the time of opening an account, Eaton Vance generally requires you to provide us with certain information such as name, address, social security number, tax status, account numbers, and account balances. This information is necessary for us to both open an account for you and to allow us to satisfy legal requirements such as applicable anti-money laundering reviews and know-your-customer requirements.

•

On an ongoing basis, in the normal course of servicing your account, Eaton Vance may share your information with unaffiliated third parties that perform various services for Eaton Vance and/or your account. These third parties include transfer agents, custodians, broker/dealers and our professional advisers, including auditors, accountants, and legal counsel. Eaton Vance may additionally share your personal information with our affiliates.

•

We believe our Privacy Program is reasonably designed to protect the confidentiality of your personal information and to prevent unauthorized access to that information.

•

We reserve the right to change our Privacy Program at any time upon proper notification to you. You may want to review our Privacy Program periodically for changes by accessing the link on our homepage: www.eatonvance.com.

Our pledge of protecting your personal information applies to the following entities within the Eaton Vance organization: the Eaton Vance Family of Funds, Eaton Vance Management, Eaton Vance Investment Counsel, Eaton Vance Distributors, Inc., Eaton Vance Trust Company, Eaton Vance Management (International) Limited, Eaton Vance Advisers International Limited, Eaton Vance Global Advisors Limited, Eaton Vance Management’s Real Estate Investment Group, Boston Management and Research, Calvert Research and Management, and Calvert Funds. This Privacy Notice supersedes all previously issued privacy disclosures. For more information about our Privacy Program or about how your personal information may be used, please call 1-800-262-1122.

Delivery of Shareholder Documents. The Securities and Exchange Commission (SEC) permits funds to deliver only one copy of shareholder documents, including prospectuses, proxy statements and shareholder reports, to fund investors with multiple accounts at the same residential or post office box address. This practice is often called “householding” and it helps eliminate duplicate mailings to shareholders. American Stock Transfer & Trust Company, LLC (“AST”), the closed-end funds transfer agent, or your financial intermediary, may household the mailing of your documents indefinitely unless you instruct AST, or your financial intermediary, otherwise. If you would prefer that your Eaton Vance documents not be householded, please contact AST or your financial intermediary. Your instructions that householding not apply to delivery of your Eaton Vance documents will typically be effective within 30 days of receipt by AST or your financial intermediary.

Portfolio Holdings. Each Eaton Vance Fund and its underlying Portfolio(s) (if applicable) files a schedule of portfolio holdings on Part F to Form N-PORT with the SEC for the first and third quarters of each fiscal year. The Form N-PORT will be available on the Eaton Vance website at www.eatonvance.com, by calling Eaton Vance at 1-800-262-1122 or in the EDGAR database on the SEC’s website at www.sec.gov.

Proxy Voting. From time to time, funds are required to vote proxies related to the securities held by the funds. The Eaton Vance Funds or their underlying Portfolios (if applicable) vote proxies according to a set of policies and procedures approved by the Funds’ and Portfolios’ Boards. You may obtain a description of these policies and procedures and information on how the Funds or Portfolios voted proxies relating to portfolio securities during the most recent 12-month period ended June 30, without charge, upon request, by calling 1-800-262-1122 and by accessing the SEC’s website at www.sec.gov.

Share Repurchase Program. The Fund’s Board of Trustees has approved a share repurchase program authorizing the Fund to repurchase up to 10% of its common shares outstanding as of the last day of the prior calendar year in open-market transactions at a discount to net asset value. The repurchase program does not obligate the Fund to purchase a specific amount of shares. The Fund’s repurchase activity, including the number of shares purchased, average price and average discount to net asset value, is disclosed in the Fund’s annual and semi-annual reports to shareholders.

Additional Notice to Shareholders. If applicable, a Fund may also redeem or purchase its outstanding preferred shares in order to maintain compliance with regulatory requirements, borrowing or rating agency requirements or for other purposes as it deems appropriate or necessary.

Closed-End Fund Information. Eaton Vance closed-end funds make fund performance data and certain information about portfolio characteristics available on the Eaton Vance website shortly after the end of each month. Other information about the funds is available on the website. The funds’ net asset value per share is readily accessible on the Eaton Vance website. Portfolio holdings for the most recent month-end are also posted to the website approximately 30 days following the end of the month. This information is available at www.eatonvance.com on the fund information pages under “Individual Investors — Closed-End Funds”.


		25

This Page Intentionally Left Blank

Investment Adviser and Administrator

Eaton Vance Management

Two International Place

Boston, MA 02110

Investment Sub-Adviser

Parametric Portfolio Associates LLC

800 Fifth Avenue, Suite 2800

Seattle, WA 98104

Custodian

State Street Bank and Trust Company

State Street Financial Center, One Lincoln Street

Boston, MA 02111

Transfer Agent

American Stock Transfer & Trust Company, LLC

6201 15^th Avenue

Brooklyn, NY 11219

Independent Registered Public Accounting Firm

Deloitte & Touche LLP

200 Berkeley Street

Boston, MA 02116-5022

Fund Offices

Two International Place

Boston, MA 02110

LOGO

2427 12.31.19

Item 2. Code of Ethics

The registrant has adopted a code of ethics applicable to its Principal Executive Officer, Principal Financial Officer and Principal Accounting Officer. The registrant undertakes to provide a copy of such code of ethics to any person upon request, without charge, by calling 1-800-262-1122. The registrant has not amended the code of ethics as described in Form N-CSR during the period covered by this report. The registrant has not granted any waiver, including an implicit waiver, from a provision of the code of ethics as described in Form N-CSR during the period covered by this report.

Item 3. Audit Committee Financial Expert

The registrant’s Board has designated George J. Gorman and William H. Park, each an independent trustee, as audit committee financial experts. Mr. Gorman is a certified public accountant who is the Principal at George J. Gorman LLC (a consulting firm). Previously, Mr. Gorman served in various capacities at Ernst & Young LLP (a registered public accounting firm), including as Senior Partner. Mr. Gorman also has experience serving as an independent trustee and audit committee financial expert of other mutual fund complexes. Mr. Park is a certified public accountant who is a private investor. Previously, he served as a consultant, as the Chief Financial Officer of Aveon Group, L.P. (an investment management firm), as the Vice Chairman of Commercial Industrial Finance Corp. (specialty finance company), as President and Chief Executive Officer of Prizm Capital Management, LLC (investment management firm), as Executive Vice President and Chief Financial Officer of United Asset Management Corporation (an institutional investment management firm) and as a Senior Manager at Price Waterhouse (now PricewaterhouseCoopers) (a registered public accounting firm).

Item 4. Principal Accountant Fees and Services

(a) –(d)

The following table presents the aggregate fees billed to the registrant for the registrant’s fiscal years ended December 31, 2018 and December 31, 2019 by the registrant’s principal accountant, Deloitte & Touche LLP (“D&T”), for professional services rendered for the audit of the registrant’s annual financial statements and fees billed for other services rendered by D&T during such periods.


Fiscal Years Ended	12/31/18		12/31/19
Audit Fees	$	47,920	$	48,650
Audit-Related Fees⁽¹⁾	$	0	$	0
Tax Fees⁽²⁾	$	9,144	$	8,831
All Other Fees⁽³⁾	$	0	$	0

Total	$	57,064	$	57,481

⁽¹⁾	Audit-related fees consist of the aggregate fees billed for assurance and related services that are reasonably related to the performance of the audit of financial statements and are not reported under the category of audit fees.

⁽²⁾	Tax fees consist of the aggregate fees billed for professional services rendered by the principal accountant relating to tax compliance, tax advice, and tax planning and specifically include fees for tax return preparation and other related tax compliance/planning matters.

⁽³⁾	All other fees consist of the aggregate fees billed for products and services provided by the principal accountant other than audit, audit-related, and tax services.

(e)(1) The registrant’s audit committee has adopted policies and procedures relating to the pre-approval of services provided by the registrant’s principal accountant (the “Pre-Approval Policies”). The Pre-Approval Policies establish a framework intended to assist the audit committee in the proper discharge of its pre-approval responsibilities. As a general matter, the Pre-Approval Policies (i) specify certain types of audit, audit-related, tax, and other services determined to be pre-approved by the audit committee; and (ii) delineate specific procedures governing the mechanics of the pre-approval process, including the approval and monitoring of audit and non-audit service fees. Unless a service is specifically pre-approved under the Pre-Approval Policies, it must be separately pre-approved by the audit committee.

The Pre-Approval Policies and the types of audit and non-audit services pre-approved therein must be reviewed and ratified by the registrant’s audit committee at least annually. The registrant’s audit committee maintains full responsibility for the appointment, compensation, and oversight of the work of the registrant’s principal accountant.

(e)(2) No services described in paragraphs (b)-(d) above were approved by the registrant’s audit committee pursuant to the “de minimis exception” set forth in Rule 2-01(c)(7)(i)(C) of Regulation S-X.

(f) Not applicable.

(g) The following table presents (i) the aggregate non-audit fees (i.e., fees for audit-related, tax, and other services) billed to the registrant by D&T for the registrant’s fiscal years ended December 31, 2018 and December 31, 2019; and (ii) the aggregate non-audit fees (i.e., fees for audit-related, tax, and other services) billed to the Eaton Vance organization by D&T for the same time periods.


Fiscal Years Ended	12/31/18		12/31/19
Registrant	$	9,144	$	8,831
Eaton Vance⁽¹⁾	$	126,485	$	59,903

⁽¹⁾	The investment adviser to the registrant, as well as any of its affiliates that provide ongoing services to the registrant, are subsidiaries of Eaton Vance Corp.

(h) The registrant’s audit committee has considered whether the provision by the registrant’s principal accountant of non-audit services to the registrant’s investment adviser and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant that were not pre-approved pursuant to Rule 2-01(c)(7)(ii) of Regulation S-X is compatible with maintaining the principal accountant’s independence.

Item 5. Audit Committee of Listed Registrants

The registrant has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Securities and Exchange Act of 1934, as amended. George J. Gorman (Chair), William H. Park, Helen Frame Peters and Scott E. Wennerholm are the members of the registrant’s audit committee.

Item 6. Schedule of Investments

Please see schedule of investments contained in the Report to Stockholders included under Item 1 of this Form N-CSR.

Item 7. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies

The Board of Trustees of the Trust has adopted a proxy voting policy and procedure (the “Fund Policy”), pursuant to which the Trustees have delegated proxy voting responsibility to the Fund’s investment adviser and adopted the investment adviser’s proxy voting policies and procedures (the “Policies”) which are described below. The Trustees will review the Fund’s proxy voting records from time to time and will annually consider the Policies for the upcoming year. In the event that a conflict of interest arises between the Fund’s shareholders and the investment adviser, the administrator, or any of their affiliates or any affiliate of the Fund, the investment adviser will generally refrain from voting the proxies related to the companies giving rise to such conflict until it consults with the Board, or any committee, sub-committee or group of Independent Trustees identified by the Board, which will instruct the investment adviser on the appropriate course of action. If the Board Members are unable to meet and the failure to vote a proxy would have a material adverse impact on the Fund, the investment adviser may vote such proxy, provided that it discloses the existence of the material conflict to the Chairperson of the Fund’s Board of Trustees as soon as practicable and to the Board of Trustees at its next meeting.

The Policies are designed to promote accountability of a company’s management to its shareholders and to align the interests of management with those shareholders. An independent proxy voting service (“Agent”), currently Institutional Shareholder Services, Inc., has been retained to assist in the voting of proxies through the provision of vote analysis, implementation and recordkeeping and disclosure services. The investment adviser will generally vote proxies through the Agent. The Agent is required to vote all proxies in accordance with customized proxy voting guidelines (the “Guidelines”) and/or refer them back to the investment adviser pursuant to the Policies.

The Agent is required to establish and maintain adequate internal controls and policies in connection with the provision of proxy voting services, including methods to reasonably ensure that its analysis and recommendations are not influenced by a conflict of interest. The Guidelines include voting guidelines for matters relating to, among other things, the election of directors, approval of independent auditors, executive compensation, corporate structure and anti-takeover defenses. The investment adviser may cause the Fund to abstain from voting from time to time where it determines that the costs associated with voting a proxy outweigh the benefits derived from exercising the right to vote or it is unable to access or access timely ballots or other proxy information, among other stated reasons. The Agent will refer Fund proxies to the investment adviser for instructions under circumstances where, among others: (1) the application of the Guidelines is unclear; (2) a particular proxy question is not covered by the Guidelines; or (3) the Guidelines require input from the investment adviser. When a proxy voting issue has been referred to the investment adviser, the analyst (or portfolio manager if applicable) covering the company subject to the proxy proposal determines the final vote (or decision not to vote) and the investment adviser’s Proxy Administrator (described below) instructs the Agent to vote accordingly for securities held by the Fund. Where more than one analyst covers a particular company and the recommendations of such analysts voting a proposal conflict, the investment adviser’s Global Proxy Group (described below) will review such recommendations and any other available information related to the proposal and determine the manner in which it should be voted, which may result in different recommendations for the Fund that may differ from other clients of the investment adviser.

The investment adviser has appointed a Proxy Administrator to assist in the coordination of the voting of client proxies (including the Fund’s) in accordance with the Guidelines and the Policies. The investment adviser and its affiliates have also established a Global Proxy Group. The Global Proxy Group develops the investment adviser’s positions on all major corporate issues, creates the Guidelines and oversees the proxy voting process. The Proxy Administrator maintains a record of all proxy questions that have been referred by the Agent, all applicable recommendations, analysis and research received and any resolution of the matter. Before instructing the Agent to vote contrary to the Guidelines or the recommendation of the Agent, the Proxy Administrator will

provide the Global Proxy Group with the Agent’s recommendation for the proposal along with any other relevant materials, including the basis for the analyst’s recommendation. The Proxy Administrator will then instruct the Agent to vote the proxy in the manner determined by the Global Proxy Group. A similar process will be followed if the Agent has a conflict of interest with respect to a proxy. The investment adviser will report to the Fund’s Board of Trustees any votes cast contrary to the Guidelines or Agent recommendations, as applicable, no less than annually.

The investment adviser’s Global Proxy Group is responsible for monitoring and resolving possible material conflicts with respect to proxy voting. Because the Guidelines are predetermined and designed to be in the best interests of shareholders, application of the Guidelines to vote client proxies should, in most cases, adequately address any possible conflict of interest. The investment adviser will monitor situations that may result in a conflict of interest between any of its clients and the investment adviser or any of its affiliates by maintaining a list of significant existing and prospective corporate clients. The Proxy Administrator will compare such list with the names of companies of which he or she has been referred a proxy statement (the “Proxy Companies”). If a company on the list is also a Proxy Company, the Proxy Administrator will report that fact to the Global Proxy Group. If the Proxy Administrator intends to instruct the Agent to vote in a manner inconsistent with the Guidelines, the Global Proxy Group will first determine, in consultation with legal counsel if necessary, whether a material conflict exists. If it is determined that a material conflict exists, the investment adviser will seek instruction on how the proxy should be voted from the Fund’s Board of Trustees, or any committee or subcommittee identified by the Board. If a matter is referred to the Global Proxy Group, the decision made and basis for the decision will be documented by the Proxy Administrator and/or Global Proxy Group.

Information on how the Fund voted proxies relating to portfolio securities during the most recent 12 month period ended June 30 is available (1) without charge, upon request, by calling 1-800-262-1122, and (2) on the Securities and Exchange Commission’s website at http://www.sec.gov.

Item 8. Portfolio Managers of Closed-End Management Investment Companies

Eaton Vance Management (“EVM” or “Eaton Vance”) is the investment adviser of the Fund. EVM has engaged its affiliate, Parametric Portfolio Associates LLC (“Parametric”), as the sub-adviser of the Fund. Michael A. Allison and Thomas C. Seto comprise the investment team responsible for the overall and day-to-day management of the Fund’s investments.

Mr. Allison is a Vice President of EVM, is a member of EVM’s Equity Strategy Committee and has been a portfolio manager of the Fund since June 2015. Mr. Seto is Head of Investment Management at Parametric’s Seattle Investment Center and has been a portfolio manager of the Fund since April 2005. Messrs. Allison and Seto have managed other Eaton Vance portfolios for more than five years. This information is provided as of the date of filing this report.

The following table shows, as of the Fund’s most recent fiscal year end, the number of accounts each portfolio manager managed in each of the listed categories and the total assets (in millions of dollars) in the accounts managed within each category. The table also shows the number of accounts with respect to which the advisory fee is based on the performance of the account, if any, and the total assets (in millions of dollars) in those accounts.


	Number of All Accounts			Total Assets of All Accounts			Number of Accounts Paying a Performance Fee		Total Assets of Accounts Paying a Performance Fee
Michael A. Allison⁽¹⁾
Registered Investment Companies		17		$	37,711.9			0	$	0
Other Pooled Investment Vehicles		14		$	25,769.3	⁽³⁾		0	$	0
Other Accounts		1		$	0.4			0	$	0

Thomas C. Seto
Registered Investment Companies		39	⁽²⁾	$	27,039.8			0	$	0
Other Pooled Investment Vehicles		10		$	2,496.9			0	$	0
Other Accounts		40,734		$	134,475.6	⁽⁴⁾		0	$	0

⁽¹⁾

This portfolio manager serves as portfolio manager of one or more registered investment companies that invests or may invest in one or more underlying registered investment companies in the Eaton Vance family of funds or other pooled investment vehicles sponsored by Eaton Vance. The underlying investment companies may be managed by this portfolio manager or another portfolio manager.

⁽²⁾	This portfolio manager provides investment advice with respect to only a portion of the total assets of certain of these accounts. Only the assets allocated to this portfolio manager as of the Fund’s most recent fiscal year end are reflected in the table.

⁽³⁾

Certain of these “Other Pooled Investment Vehicles” invest a substantial portion of their assets either in a registered investment company in the Eaton Vance family of funds and/or in a separate pooled investment vehicle sponsored by Eaton Vance which may be managed by this portfolio manager or another portfolio manager.

⁽⁴⁾	For “Other Accounts” that are part of a wrap or model account program, the number of accounts is the number of sponsors for which the portfolio manager provides advisory services rather than the number of individual customer accounts within each wrap or model account program.

The following table shows the dollar range of Fund shares beneficially owned by each portfolio manager as of the Fund’s most recent fiscal year end.


Portfolio Manager		Dollar Range of Equity Securities Beneficially Owned in the Fund
Michael A. Allison		$1 - $10,000
Thomas C. Seto		None

Potential for Conflicts of Interest. It is possible that conflicts of interest may arise in connection with a portfolio manager’s management of the Fund’s investments on the one hand and the investments of other accounts for which a portfolio manager is responsible on the other. For example, a portfolio manager may have conflicts of interest in allocating management time, resources and investment opportunities among the Fund and other accounts he advises. In addition, due to differences in the investment strategies or restrictions between the Fund and the other accounts, the portfolio manager may take action with respect to another account that differs from the action taken with respect to the Fund. In some cases, another account managed by a portfolio manager may compensate the investment adviser based on the performance of the securities held by that account. The existence of such a performance based fee may create additional conflicts of interest for the portfolio manager in the allocation of management time, resources and investment opportunities. Whenever conflicts of interest arise, the portfolio manager will endeavor to exercise his discretion in a manner that he believes is equitable to all interested persons. EVM has adopted several policies and procedures designed to address these potential conflicts including a code of ethics and policies that govern the investment adviser’s trading practices, including among other things the aggregation and allocation of trades among clients, brokerage allocations, cross trades and best execution.

Compensation Structure for EVM

Compensation of EVM’s portfolio managers and other investment professionals has the following primary components: (1) a base salary, (2) an annual cash bonus, (3) annual non-cash compensation consisting of options to purchase shares of Eaton Vance Corp.’s (“EVC”) nonvoting common stock and/or restricted shares of EVC nonvoting common stock that generally are subject to a vesting schedule and (4) (for equity portfolio managers) a Deferred Alpha Incentive Plan, which pays a deferred cash award tied to future excess returns in certain equity strategy portfolios. EVM’s investment professionals also receive certain retirement, insurance and other benefits that are broadly available to EVM’s employees. Compensation of EVM’s investment professionals is reviewed primarily on an annual basis. Cash bonuses, stock-based compensation awards, and adjustments in base salary are typically paid or put into effect at or shortly after the October 31st fiscal year end of EVC.

Method to Determine Compensation. EVM compensates its portfolio managers based primarily on the scale and complexity of their portfolio responsibilities and the total return performance of managed funds and accounts versus the benchmark(s) stated in the prospectus, as well as an appropriate peer group (as described below). In addition to rankings within peer groups of funds on the basis of absolute performance, consideration may also be given to relative risk-adjusted performance. Risk-adjusted performance measures include, but are not limited to Sharpe Ratio, which uses standard deviation and excess return to determine reward per unit of risk. Performance is normally based on periods ending on the September 30th preceding fiscal year end. Fund performance is normally evaluated primarily versus peer groups of funds as determined by Lipper Inc. and/or Morningstar, Inc. When a fund’s peer group as determined by Lipper or Morningstar is deemed by EVM’s management not to provide a fair comparison, performance may instead be evaluated primarily against a custom peer group or market index. In evaluating the performance of a fund and its manager, primary emphasis is normally placed on three-year performance, with secondary consideration of performance over longer and shorter periods. For funds that are tax-managed or otherwise have an objective of after-tax returns, performance is measured net of taxes. For other funds, performance is evaluated on a pre-tax basis. For funds with an investment objective other than total return (such as current income), consideration will also be given to the fund’s success in achieving its objective. For managers responsible for multiple funds and accounts, investment performance is evaluated on an aggregate basis, based on averages or weighted averages among managed funds and accounts. Funds and accounts that have performance-based advisory fees are not accorded disproportionate weightings in measuring aggregate portfolio manager performance. Pursuant to the Deferred Alpha Incentive Plan, a portion of the compensation payable to equity portfolio managers and investment professionals will be determined based on the ability of one or more accounts managed by such manager, that are not advised by Calvert Management and Research to achieve a specified target average annual gross return over a three year period in excess of the account benchmark. The cash award to be payable at the end of the three year term will be established at the inception of the term and will be adjusted positively or negatively to the extent that the average annual gross return varies from the specified target return.

The compensation of portfolio managers with other job responsibilities (such as heading an investment group or providing analytical support to other portfolios) will include consideration of the scope of such responsibilities and the managers’ performance in meeting them.

EVM seeks to compensate portfolio managers commensurate with their responsibilities and performance, and competitive with other firms within the investment management industry. EVM participates in investment-industry compensation surveys and utilizes survey data as a factor in determining salary, bonus and stock-based compensation levels for portfolio managers and other investment professionals. Salaries, bonuses and stock-based compensation are also influenced by the operating performance of EVM and its parent company. The overall annual cash bonus pool is generally based on a substantially fixed percentage of pre-bonus adjusted operating income. While the salaries of EVM’s portfolio managers are comparatively fixed, cash bonuses and stock-based compensation may fluctuate significantly from year to year, based on changes in manager performance and other factors as described herein. For a high performing portfolio manager, cash bonuses and stock-based compensation may represent a substantial portion of total compensation.

Compensation Structure for Parametric

Parametric believes that its compensation packages, which are described below, are adequate to attract and retain high-caliber professional employees. Please note that compensation for investment professionals is not based directly on investment performance or assets managed, but rather on the overall performance of responsibilities. In this way, the interests of portfolio managers are aligned with the interests of investors without providing incentive to take undue or insufficient investment risk. Violations of Parametric’s policies would be a contributing factor when evaluating an employee’s discretionary bonus.

Compensation of Parametric portfolio managers and other investment professionals has three primary components: (1) a base salary, (2) an annual cash bonus, and (3) annual equity-based compensation awards that generally are subject to a vesting schedule. Stock-based compensation awards and adjustments in base salary and bonuses are typically paid and/or put into effect at or shortly after, the firm’s fiscal year-end, October 31.

The firm also maintains the following arrangements:

•

Employment contracts for key investment professionals and senior leadership.

•

Eligible employees receive Eaton Vance equity grants that vest over a multi-year period from grant date.

Method to Determine Compensation. Because the Fund’s strategies are rules-based, portfolio managers and other investment professionals primarily are measured with respect to whether a strategy’s rules as implemented delivered on the strategy’s objectives. In evaluating the foregoing, Parametric evaluates the manner in which the strategy is implemented relative to strategy targets, rebalancing portfolio exposures consistent with pre-determined triggers, and judicious trade construction. Portfolio managers are also expected to monitor local market trading practices that may impact implementation of a strategy and to seek potential ways to address them as needed. This is particularly relevant in the emerging markets, where market practices are continuously evolving. If the portfolio manager deviates from the implementation of the rules as defined by the strategy, they are not performing the responsibilities of their role and compensation may be adjusted accordingly.

Item 9. Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers

No such purchases this period.

Item 10. Submission of Matters to a Vote of Security Holders

No material changes.

Item 11. Controls and Procedures

(a) It is the conclusion of the registrant’s principal executive officer and principal financial officer that the effectiveness of the registrant’s current disclosure controls and procedures (such disclosure controls and procedures having been evaluated within 90 days of the date of this filing) provide reasonable assurance that the information required to be disclosed by the registrant has been recorded, processed, summarized and reported within the time period specified in the Commission’s rules and forms and that the information required to be disclosed by the registrant has been accumulated and communicated to the registrant’s principal executive officer and principal financial officer in order to allow timely decisions regarding required disclosure.

(b) There have been no changes in the registrant’s internal controls over financial reporting during the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

Item 12. Disclosure of Securities Lending Activities for Closed-End Management Investment Companies

No activity to report for the registrant’s most recent fiscal year end.

Item 13. Exhibits



(a)(1)		Registrant’s Code of Ethics – Not applicable (please see Item 2).

(a)(2)(i)		Treasurer’s Section 302 certification.

(a)(2)(ii)		President’s Section 302 certification.

(b)		Combined Section 906 certification.

(c)		Registrant’s notices to shareholders pursuant to Registrant’s exemptive order granting an exemption from Section 19(b) of the 1940 Act and Rule 19b-1 thereunder regarding distributions paid pursuant to the Registrant’s Managed Distribution Plan.

Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Eaton Vance Tax-Managed Buy-Write Income Fund


By:		/s/ Edward J. Perkin
		Edward J. Perkin
		President

Date:		February 24, 2020

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.


By:		/s/ James F. Kirchner
		James F. Kirchner
		Treasurer

Date:		February 24, 2020


By:		/s/ Edward J. Perkin
		Edward J. Perkin
		President

Date:		February 24, 2020

Eaton Vance Tax-Managed Buy-Write Income Fund

FORM N-CSR

Exhibit 13(a)(2)(i)

CERTIFICATION

I, James F. Kirchner, certify that:

1. I have reviewed this report on Form N-CSR of Eaton Vance Tax-Managed Buy-Write Income Fund;

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, changes in net assets, and cash flows (if the financial statements are required to include a statement of cash flows) of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and 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 a date within 90 days prior to the filing date of 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 period covered by this 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(s) and I have disclosed 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:	February 24, 2020	/s/ James F. Kirchner
		James F. Kirchner
		Treasurer

Eaton Vance Tax-Managed Buy-Write Income Fund

FORM N-CSR

Exhibit 13(a)(2)(ii)

CERTIFICATION

I, Edward J. Perkin, certify that:

1. I have reviewed this report on Form N-CSR of Eaton Vance Tax-Managed Buy-Write Income Fund;

(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:	February 24, 2020	/s/ Edward J. Perkin
		Edward J. Perkin
		President

Form N-CSR Item 13(b) Exhibit

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned hereby certify in their capacity as Treasurer and President, respectively, of Eaton Vance Tax-Managed Buy-Write Income Fund (the “Fund”), that:

(a)

the Annual Report of the Fund on Form N-CSR for the period ended December 31, 2019 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(b)

the information contained in the Report fairly presents, in all material respects, the financial condition and the results of operations of the Fund for such period.

A signed original of this written statement required by section 906 has been provided to the Fund and will be retained by the Fund and furnished to the Securities and Exchange Commission or its staff upon request.

Eaton Vance Tax-Managed Buy-Write Income Fund

Date: February 24, 2020

/s/ James F. Kirchner

James F. Kirchner

Treasurer

Date: February 24, 2020

/s/ Edward J. Perkin

Edward J. Perkin

President

Form N-CSR Item 13(c) Exhibit

LOGO

Dear Eaton Vance Fund Shareholder:

This notice provides shareholders of the Eaton Vance Tax-Managed Buy-Write Income Fund (NYSE: ETB) with important information concerning the distribution declared in July 2019. You are receiving this notice as a requirement of the Fund’s managed distribution plan (Plan). The Board of Trustees approved the implementation of the Plan to make monthly cash distributions to common shareholders, stated in terms of a fixed amount per common share. This information is sent to you for informational purposes only and is an estimate of the sources of the July distribution. It is not determinative of the tax character of the Fund’s distributions for the 2019 calendar year.

The amounts and sources of distributions reported in this notice are estimates, are not being provided for tax reporting purposes and the distribution may later be determined to be from other sources including realized short-term gains, long-term gains, to the extent permitted by law, and return of capital. The actual amounts and sources for tax reporting purposes will depend upon the Fund’s investment experience during the remainder of its fiscal year and may be subject to changes based on tax regulations. The Fund will send you a Form 1099-DIV for the calendar year that will tell you how to report these distributions for federal income tax purposes.

Distribution Period: July 2019

Distribution Amount per Common Share: $0.1080

The following table sets forth an estimate of the sources of the Fund’s July distribution and its cumulative distributions paid this fiscal year to date. Amounts are expressed on a per common share basis and as a percentage of the distribution amount.


Eaton Vance Tax-Managed Buy-Write Income Fund
Source	Current Distribution		% of Current Distribution			Cumulative Distributions for the Fiscal Year-to-Date¹		% of the Cumulative Distributions for the Fiscal Year-to-Date¹
Net Investment Income	$	0.0111		10.3	%	$	0.0862		11.4	%

Net Realized Short-Term Capital Gains	$	0.0000		0.0	%	$	0.0000		0.0	%

Net Realized Long-Term Capital Gains	$	0.0000		0.0	%	$	0.0000		0.0	%

Return of Capital or Other Capital Source(s)	$	0.0969		89.7	%	$	0.6698		88.6	%

Total per common share	$	0.1080		100.0	%	$	0.7560		100.0	%

¹	The Fund’s fiscal year is January 1, 2019 to December 31, 2019

IMPORTANT DISCLOSURE: You should not draw any conclusions about the Fund’s investment performance from the amount of this distribution or from the terms of the Fund’s Plan. The Fund estimates that it has distributed more than its income and net realized capital gains; therefore, a portion of your distribution may be a return of capital. A return of capital may occur for example, when some or all of the money that you invested in the Fund is paid back to you. A return of capital distribution does not necessarily reflect the Fund’s investment performance and should not be confused with ‘yield’ or ‘income.’ The amounts and sources of distributions reported in this Notice are only estimates and are not being provided for tax reporting purposes. The actual amounts and sources of the amounts for accounting and/or tax reporting purposes will depend upon the Fund’s investment experience during the remainder of its fiscal year and may be subject to changes based on tax regulations. The Fund will send you a Form 1099-DIV for the calendar year that will tell you how to report these distributions for federal income tax purposes.

Set forth in the table below is information relating to the Fund’s performance based on its net asset value (NAV) for certain periods.


Average annual total return at NAV for the 5-year period ended on June 30, 2019¹	6.30	%
Annualized current distribution rate expressed as a percentage of NAV as of June 30, 2019²	8.76	%
Cumulative total return at NAV for the fiscal year through June 30, 2019³	10.06	%
Cumulative fiscal year to date distribution rate as a percentage of NAV as of June 30, 2019⁴	4.38	%

¹	Average annual total return at NAV represents the change in NAV of the Fund, with all distributions reinvested, for the 5-year period ended on June 30, 2019.

²	The annualized current distribution rate is the cumulative distribution rate annualized as a percentage of the Fund’s NAV as of June 30, 2019.

³	Cumulative total return at NAV is the percentage change in the Fund’s NAV for the period from the beginning of its fiscal year to June 30, 2019 including distributions paid and assuming reinvestment of those distributions.

⁴	Cumulative fiscal year distribution rate for the period from the beginning of its fiscal year to June 30, 2019 measured on the dollar value of distributions in the year-to-date period as a percentage of the Fund’s NAV as of June 30, 2019.

If you have any questions regarding this information, please contact your investment advisor or an Eaton Vance Investor Services associate at 1-866-328-6681. Our associates are available to assist you Monday-Friday 8:30 a.m. to 5:30 p.m., Eastern Time.

NOTE: This correspondence is for informational purposes only and should not be relied upon to project the tax character of actual Fund distributions for the 2019 calendar year.

NO ACTION IS REQUIRED ON YOUR PART.

Eaton Vance Tax-Managed Buy-Write Income Fund

July 31, 2019

LOGO

Dear Eaton Vance Fund Shareholder:

This notice provides shareholders of the Eaton Vance Tax-Managed Buy-Write Income Fund (NYSE: ETB) with important information concerning the distribution declared in August 2019. You are receiving this notice as a requirement of the Fund’s managed distribution plan (Plan). The Board of Trustees approved the implementation of the Plan to make monthly cash distributions to common shareholders, stated in terms of a fixed amount per common share. This information is sent to you for informational purposes only and is an estimate of the sources of the August distribution. It is not determinative of the tax character of the Fund’s distributions for the 2019 calendar year.

Distribution Period: August 2019

Distribution Amount per Common Share: $0.1080

The following table sets forth an estimate of the sources of the Fund’s August distribution and its cumulative distributions paid this fiscal year to date. Amounts are expressed on a per common share basis and as a percentage of the distribution amount.


Eaton Vance Tax-Managed Buy-Write Income Fund
Source	Current Distribution		% of Current Distribution			Cumulative Distributions for the Fiscal Year-to-Date¹		% of the Cumulative Distributions for the Fiscal Year-to-Date¹
Net Investment Income	$	0.0111		10.3	%	$	0.0968		11.2	%

Net Realized Short-Term Capital Gains	$	0.0000		0.0	%	$	0.0000		0.0	%

Net Realized Long-Term Capital Gains	$	0.0969		89.7	%	$	0.1356		15.7	%

Return of Capital or Other Capital Source(s)	$	0.0000		0.0	%	$	0.6316		73.1	%

Total per common share	$	0.1080		100.0	%	$	0.8640		100.0	%

¹	The Fund’s fiscal year is January 1, 2019 to December 31, 2019

Set forth in the table below is information relating to the Fund’s performance based on its net asset value (NAV) for certain periods.


Average annual total return at NAV for the 5-year period ended on July 31, 2019¹	6.71	%
Annualized current distribution rate expressed as a percentage of NAV as of July 31, 2019²	8.72	%
Cumulative total return at NAV for the fiscal year through July 31, 2019³	11.37	%
Cumulative fiscal year to date distribution rate as a percentage of NAV as of July 31, 2019⁴	5.09	%

¹	Average annual total return at NAV represents the change in NAV of the Fund, with all distributions reinvested, for the 5-year period ended on July 31, 2019.

²	The annualized current distribution rate is the cumulative distribution rate annualized as a percentage of the Fund’s NAV as of July 31, 2019.

³	Cumulative total return at NAV is the percentage change in the Fund’s NAV for the period from the beginning of its fiscal year to July 31, 2019 including distributions paid and assuming reinvestment of those distributions.

⁴	Cumulative fiscal year distribution rate for the period from the beginning of its fiscal year to July 31, 2019 measured on the dollar value of distributions in the year-to-date period as a percentage of the Fund’s NAV as of July 31, 2019.

NOTE: This correspondence is for informational purposes only and should not be relied upon to project the tax character of actual Fund distributions for the 2019 calendar year.

NO ACTION IS REQUIRED ON YOUR PART.

Eaton Vance Tax-Managed Buy-Write Income Fund

August 30, 2019

LOGO

Dear Eaton Vance Fund Shareholder:

This notice provides shareholders of the Eaton Vance Tax-Managed Buy-Write Income Fund (NYSE: ETB) with important information concerning the distribution declared in September 2019. You are receiving this notice as a requirement of the Fund’s managed distribution plan (Plan). The Board of Trustees approved the implementation of the Plan to make monthly cash distributions to common shareholders, stated in terms of a fixed amount per common share. This information is sent to you for informational purposes only and is an estimate of the sources of the September distribution. It is not determinative of the tax character of the Fund’s distributions for the 2019 calendar year.

Distribution Period: September 2019

Distribution Amount per Common Share: $0.1080

The following table sets forth an estimate of the sources of the Fund’s September distribution and its cumulative distributions paid this fiscal year to date. Amounts are expressed on a per common share basis and as a percentage of the distribution amount.


Eaton Vance Tax-Managed Buy-Write Income Fund
Source	Current Distribution		% of Current Distribution			Cumulative Distributions for the Fiscal Year-to-Date¹		% of the Cumulative Distributions for the Fiscal Year-to-Date¹
Net Investment Income	$	0.0105		9.7	%	$	0.1079		11.1	%

Net Realized Short-Term Capital Gains	$	0.0000		0.0	%	$	0.0000		0.0	%

Net Realized Long-Term Capital Gains	$	0.0000		0.0	%	$	0.0914		9.4	%

Return of Capital or Other Capital Source(s)	$	0.0975		90.3	%	$	0.7727		79.5	%

Total per common share	$	0.1080		100.0	%	$	0.9720		100.0	%

¹	The Fund’s fiscal year is January 1, 2019 to December 31, 2019

Set forth in the table below is information relating to the Fund’s performance based on its net asset value (NAV) for certain periods.


Average annual total return at NAV for the 5-year period ended on August 31, 2019¹	5.99	%
Annualized current distribution rate expressed as a percentage of NAV as of August 31, 2019²	8.85	%
Cumulative total return at NAV for the fiscal year through August 31, 2019³	10.61	%
Cumulative fiscal year to date distribution rate as a percentage of NAV as of August 31, 2019⁴	5.90	%

¹	Average annual total return at NAV represents the change in NAV of the Fund, with all distributions reinvested, for the 5-year period ended on August 31, 2019.

²	The annualized current distribution rate is the cumulative distribution rate annualized as a percentage of the Fund’s NAV as of August 31, 2019.

³	Cumulative total return at NAV is the percentage change in the Fund’s NAV for the period from the beginning of its fiscal year to August 31, 2019 including distributions paid and assuming reinvestment of those distributions.

⁴	Cumulative fiscal year distribution rate for the period from the beginning of its fiscal year to August 31, 2019 measured on the dollar value of distributions in the year-to-date period as a percentage of the Fund’s NAV as of August 31, 2019.

NOTE: This correspondence is for informational purposes only and should not be relied upon to project the tax character of actual Fund distributions for the 2019 calendar year.

NO ACTION IS REQUIRED ON YOUR PART.

Eaton Vance Tax-Managed Buy-Write Income Fund

September 30, 2019

LOGO

Dear Eaton Vance Fund Shareholder:

This notice provides shareholders of the Eaton Vance Tax-Managed Buy-Write Income Fund (NYSE: ETB) with important information concerning the distribution declared in October 2019. You are receiving this notice as a requirement of the Fund’s managed distribution plan (Plan). The Board of Trustees approved the implementation of the Plan to make monthly cash distributions to common shareholders, stated in terms of a fixed amount per common share. This information is sent to you for informational purposes only and is an estimate of the sources of the October distribution. It is not determinative of the tax character of the Fund’s distributions for the 2019 calendar year.

Distribution Period: October 2019

Distribution Amount per Common Share: $0.1080

The following table sets forth an estimate of the sources of the Fund’s October distribution and its cumulative distributions paid this fiscal year to date. Amounts are expressed on a per common share basis and as a percentage of the distribution amount.


Eaton Vance Tax-Managed Buy-Write Income Fund
Source	Current Distribution		% of Current Distribution			Cumulative Distributions for the Fiscal Year-to-Date¹		% of the Cumulative Distributions for the Fiscal Year-to-Date¹
Net Investment Income	$	0.0116		10.7	%	$	0.1188		11.0	%

Net Realized Short-Term Capital Gains	$	0.0000		0.0	%	$	0.0000		0.0	%

Net Realized Long-Term Capital Gains	$	0.0964		89.3	%	$	0.2484		23.0	%

Return of Capital or Other Capital Source(s)	$	0.0000		0.0	%	$	0.7128		66.0	%

Total per common share	$	0.1080		100.0	%	$	1.0800		100.0	%

¹	The Fund’s fiscal year is January 1, 2019 to December 31, 2019

Set forth in the table below is information relating to the Fund’s performance based on its net asset value (NAV) for certain periods.


Average annual total return at NAV for the 5-year period ended on September 30, 2019¹	6.60	%
Annualized current distribution rate expressed as a percentage of NAV as of September 30, 2019²	8.73	%
Cumulative total return at NAV for the fiscal year through September 30, 2019³	12.85	%
Cumulative fiscal year to date distribution rate as a percentage of NAV as of September 30, 2019⁴	6.55	%

¹	Average annual total return at NAV represents the change in NAV of the Fund, with all distributions reinvested, for the 5-year period ended on September 30, 2019.

²	The annualized current distribution rate is the cumulative distribution rate annualized as a percentage of the Fund’s NAV as of September 30, 2019.

³	Cumulative total return at NAV is the percentage change in the Fund’s NAV for the period from the beginning of its fiscal year to September 30, 2019 including distributions paid and assuming reinvestment of those distributions.

⁴	Cumulative fiscal year distribution rate for the period from the beginning of its fiscal year to September 30, 2019 measured on the dollar value of distributions in the year-to-date period as a percentage of the Fund’s NAV as of September 30, 2019.

NOTE: This correspondence is for informational purposes only and should not be relied upon to project the tax character of actual Fund distributions for the 2019 calendar year.

NO ACTION IS REQUIRED ON YOUR PART.

Eaton Vance Tax-Managed Buy-Write Income Fund

October 31, 2019

LOGO

Dear Eaton Vance Fund Shareholder:

This notice provides shareholders of the Eaton Vance Tax-Managed Buy-Write Income Fund (NYSE: ETB) with important information concerning the distribution declared in November 2019. You are receiving this notice as a requirement of the Fund’s managed distribution plan (Plan). The Board of Trustees approved the implementation of the Plan to make monthly cash distributions to common shareholders, stated in terms of a fixed amount per common share. This information is sent to you for informational purposes only and is an estimate of the sources of the November distribution. It is not determinative of the tax character of the Fund’s distributions for the 2019 calendar year.

Distribution Period: November 2019

Distribution Amount per Common Share: $0.1080

The following table sets forth an estimate of the sources of the Fund’s November distribution and its cumulative distributions paid this fiscal year to date. Amounts are expressed on a per common share basis and as a percentage of the distribution amount.


Eaton Vance Tax-Managed Buy-Write Income Fund
Source	Current Distribution		% of Current Distribution			Cumulative Distributions for the Fiscal Year-to-Date¹		% of the Cumulative Distributions for the Fiscal Year-to-Date¹
Net Investment Income	$	0.0113		10.5	%	$	0.1307		11.0	%
Net Realized Short-Term Capital Gains	$	0.0000		0.0	%	$	0.0000		0.0	%
Net Realized Long-Term Capital Gains	$	0.0967		89.5	%	$	0.4075		34.3	%
Return of Capital or Other Capital Source(s)	$	0.0000		0.0	%	$	0.6498		54.7	%
Total per common share	$	0.1080		100.0	%	$	1.1880		100.0	%

¹	The Fund’s fiscal year is January 1, 2019 to December 31, 2019

Set forth in the table below is information relating to the Fund’s performance based on its net asset value (NAV) for certain periods.


Average annual total return at NAV for the 5-year period ended on October 31, 2019¹	6.85	%
Annualized current distribution rate expressed as a percentage of NAV as of October 31, 2019²	8.61	%
Cumulative total return at NAV for the fiscal year through October 31, 2019³	15.25	%
Cumulative fiscal year to date distribution rate as a percentage of NAV as of October 31, 2019⁴	7.18	%

¹	Average annual total return at NAV represents the change in NAV of the Fund, with all distributions reinvested, for the 5-year period ended on October 31, 2019.

²	The annualized current distribution rate is the cumulative distribution rate annualized as a percentage of the Fund’s NAV as of October 31, 2019.

³	Cumulative total return at NAV is the percentage change in the Fund’s NAV for the period from the beginning of its fiscal year to October 31, 2019 including distributions paid and assuming reinvestment of those distributions.

⁴	Cumulative fiscal year distribution rate for the period from the beginning of its fiscal year to October 31, 2019 measured on the dollar value of distributions in the year-to-date period as a percentage of the Fund’s NAV as of October 31, 2019.

NOTE: This correspondence is for informational purposes only and should not be relied upon to project the tax character of actual Fund distributions for the 2019 calendar year.

NO ACTION IS REQUIRED ON YOUR PART.

Eaton Vance Tax-Managed Buy-Write Income Fund

November 29, 2019

LOGO

Dear Eaton Vance Fund Shareholder:

This notice provides shareholders of the Eaton Vance Tax-Managed Buy-Write Income Fund (NYSE: ETB) with important information concerning the distribution declared in December 2019. You are receiving this notice as a requirement of the Fund’s managed distribution plan (Plan). The Board of Trustees approved the implementation of the Plan to make monthly cash distributions to common shareholders, stated in terms of a fixed amount per common share. This information is sent to you for informational purposes only and is an estimate of the sources of the December distribution. It is not determinative of the tax character of the Fund’s distributions for the 2019 calendar year.

Distribution Period: December 2019

Distribution Amount per Common Share: $0.1080

The following table sets forth an estimate of the sources of the Fund’s December distribution and its cumulative distributions paid this fiscal year to date. Amounts are expressed on a per common share basis and as a percentage of the distribution amount.


Eaton Vance Tax-Managed Buy-Write Income Fund
Source	Current Distribution		% of Current Distribution			Cumulative Distributions for the Fiscal Year-to-Date¹		% of the Cumulative Distributions for the Fiscal Year-to-Date¹
Net Investment Income	$	0.0149		13.8	%	$	0.1452		11.2	%

Net Realized Short-Term Capital Gains	$	0.0000		0.0	%	$	0.0000		0.0	%

Net Realized Long-Term Capital Gains	$	0.0000		0.0	%	$	0.1724		13.3	%

Return of Capital or Other Capital Source(s)	$	0.0931		86.2	%	$	0.9784		75.5	%

Total per common share	$	0.1080		100.0	%	$	1.2960		100.0	%

¹	The Fund’s fiscal year is January 1, 2019 to December 31, 2019

Set forth in the table below is information relating to the Fund’s performance based on its net asset value (NAV) for certain periods.


Average annual total return at NAV for the 5-year period ended on November 30, 2019¹	6.92	%
Annualized current distribution rate expressed as a percentage of NAV as of November 30, 2019²	8.57	%
Cumulative total return at NAV for the fiscal year through November 30, 2019³	16.68	%
Cumulative fiscal year to date distribution rate as a percentage of NAV as of November 30, 2019⁴	7.85	%

¹	Average annual total return at NAV represents the change in NAV of the Fund, with all distributions reinvested, for the 5-year period ended on November 30, 2019.

²	The annualized current distribution rate is the cumulative distribution rate annualized as a percentage of the Fund’s NAV as of November 30, 2019.

³	Cumulative total return at NAV is the percentage change in the Fund’s NAV for the period from the beginning of its fiscal year to November 30, 2019 including distributions paid and assuming reinvestment of those distributions.

⁴	Cumulative fiscal year distribution rate for the period from the beginning of its fiscal year to November 30, 2019 measured on the dollar value of distributions in the year-to-date period as a percentage of the Fund’s NAV as of November 30, 2019.

NOTE: This correspondence is for informational purposes only and should not be relied upon to project the tax character of actual Fund distributions for the 2019 calendar year.

NO ACTION IS REQUIRED ON YOUR PART.

Eaton Vance Tax-Managed Buy-Write Income Fund

December 31, 2019