Share buybacks work like this: a company’s board of directors authorizes a program to repurchase the company’s own stock, and management then buys those shares back from investors using one of several methods, most often open market purchases through a broker. The repurchased shares either sit on the balance sheet as treasury stock or get formally retired, which shrinks the share count and lifts per-share metrics such as earnings per share. Federal rules govern how the buying is done, a 1% excise tax applies to most repurchases by public companies, and the activity has to be disclosed in quarterly filings. Boards pursue buybacks when they believe the stock is undervalued, when internal projects don’t justify holding so much cash, or when they want to return capital to shareholders in a form that carries different tax consequences than a dividend.
The Board Authorization That Starts a Program
No repurchase happens without a board resolution. Directors pass a formal authorization that sets a ceiling, either a maximum dollar amount or a maximum share count, and specifies how long the authorization lasts. A company might announce it has authorized up to $500 million in repurchases over the next two years. The resolution creates permission, not an obligation. The company can buy less than the authorized amount, or nothing at all, and it can let the authorization expire.
Directors owe fiduciary duties to shareholders when they authorize a buyback. Courts evaluate these decisions under the business judgment rule, which presumes the board acted properly as long as directors acted in good faith, exercised reasonable care, and genuinely believed the repurchase served the company’s interests.1Legal Information Institute (LII). Business Judgment Rule That presumption holds unless someone shows gross negligence, a personal conflict, or bad faith. In practice this gives boards wide latitude, but a buyback launched to inflate the stock ahead of insider sales could be challenged. The board also has to confirm the repurchase won’t breach debt covenants or leave the company unable to meet its obligations.
The Four Ways Companies Buy Back Their Own Stock
Open Market Purchases
The most common method is buying shares on the open market through a broker, the same way any investor would. The company purchases at prevailing prices over weeks or months, which spreads the cost across different price points and avoids moving the stock in a single session. Open market buybacks operate within the SEC’s Rule 10b-18 safe harbor.
Tender Offers
A tender offer is more direct. The company invites shareholders to sell their shares at a specified price, usually set above the current market price to attract sellers. In a fixed-price tender offer, the company names a single price and a maximum number of shares it will buy, and shareholders who want to participate submit their shares by the offer deadline.
A Dutch auction tender offer gives shareholders more flexibility. The company sets a price range, and each participating shareholder names the lowest price within that range at which they’re willing to sell. The company then works upward from the lowest submitted price until it accumulates enough shares to hit its target.2U.S. Securities and Exchange Commission. Tender Offer Q&A Everyone whose bid falls at or below the final clearing price receives that same per-share price.
Accelerated Share Repurchases
When a company wants to retire a large block of shares quickly, it may enter an accelerated share repurchase agreement with an investment bank. The bank delivers a set number of shares to the company on day one in exchange for an upfront cash payment based on the current stock price. The bank sources those shares by borrowing them from institutional investors, then covers its short position by purchasing shares on the open market over the following months. At settlement, the company and the bank reconcile the difference between the initial price and the average price the bank actually paid, with the adjustment made in cash or additional shares. The share count drops immediately while the market impact unfolds gradually.
Privately Negotiated Purchases
Companies can also buy large blocks directly from major institutional investors, founders, or other significant holders through privately negotiated transactions. These deals happen off-exchange under customized purchase agreements. Because they don’t go through public markets, they don’t affect the daily trading price the way open market purchases might, but they also fall outside the Rule 10b-18 safe harbor.
Rule 10b-18 and the SEC Safe Harbor
Buying your own stock in volume could look like market manipulation. To address that risk, the SEC adopted Rule 10b-18 under the Securities Exchange Act of 1934, which offers a voluntary safe harbor from manipulation liability if the company meets four conditions on any given trading day.3eCFR. 17 CFR 240.10b-18 – Purchases of Certain Equity Securities by the Issuer and Others “Voluntary” matters. A company that steps outside the conditions on a particular day doesn’t automatically violate securities law, and missing a condition creates no presumption of manipulation. The company simply loses the legal shield for that day’s trades.
The four conditions:
- Single broker or dealer. All repurchases on a given day must go through one broker or dealer, and any affiliated purchasers must use the same one. Limited exceptions cover unsolicited purchases and the designated broker’s use of electronic trading networks.
- Timing. The company can’t make the opening purchase of the day and can’t buy during a blackout window before the close. For heavily traded securities (average daily volume of at least $1 million and public float of at least $150 million), the blackout is the last 10 minutes. For all others, it’s the last 30 minutes.
- Price ceiling. The company can’t pay more than the highest current independent bid or the last independent transaction price, whichever is higher.4U.S. Securities and Exchange Commission. Answers to Frequently Asked Questions Concerning Rule 10b-18
- Volume cap. Daily purchases generally can’t exceed 25% of the stock’s average daily trading volume over the prior four calendar weeks. The company may make one block purchase per week that exceeds this limit, provided no other Rule 10b-18 purchases happen that day and the block is excluded from future ADTV calculations.
One important limit: the safe harbor is never available for purchases that are part of a scheme to evade federal securities laws, even if every technical condition is satisfied.3eCFR. 17 CFR 240.10b-18 – Purchases of Certain Equity Securities by the Issuer and Others
The 1% Federal Excise Tax
Since 2023, publicly traded domestic corporations have owed a 1% excise tax on the fair market value of stock they repurchase during the taxable year.5Office of the Law Revision Counsel. 26 USC 4501 – Repurchase of Corporate Stock Enacted as part of the Inflation Reduction Act of 2022, it applies to repurchases occurring after December 31, 2022. One percent sounds modest, but it adds up for companies spending billions annually.
The tax doesn’t apply when:
- Total repurchases for the taxable year don’t exceed $1 million.
- The repurchased stock, or an equivalent amount, is contributed to an employer-sponsored retirement plan or employee stock ownership plan.
- The repurchase is part of a reorganization where no gain or loss is recognized.
- The repurchaser is a regulated investment company or a real estate investment trust.
- The repurchase is made by a securities dealer in the ordinary course of business.
Corporations report and pay the tax using IRS Form 7208, attached to Form 720, the quarterly federal excise tax return. The filing deadline depends on when the corporation’s tax year ends. A calendar-year filer, for instance, attaches Form 7208 to the first-quarter Form 720 due April 30 of the following year.6Internal Revenue Service. Instructions for Form 7208, Excise Tax on Repurchase of Corporate Stock
What Happens to the Shares and to EPS
Repurchased shares land in one of two places. Most commonly they’re classified as treasury stock, a contra-equity account that reduces total shareholders’ equity on the balance sheet.7Financial and Managerial Accounting. 5.9 Treasury Stock Treasury shares don’t vote, don’t receive dividends, and aren’t counted as outstanding for financial metrics, but they remain authorized shares the company could reissue later for acquisitions or employee stock plans. Alternatively, the company can formally retire the shares, permanently reducing both the outstanding and authorized share count. Some companies use constructive retirement, where the shares haven’t been legally retired but management has decided not to reissue them. The accounting entries differ in how paid-in capital and retained earnings absorb the cost, but the effect on financial ratios is the same.
The most visible impact hits earnings per share. EPS equals net income divided by outstanding shares. When buybacks shrink the denominator, EPS rises even if profit doesn’t change. A company earning $10 million with 1 million shares outstanding has an EPS of $10. Retire 200,000 shares and EPS jumps to $12.50 on the same earnings. The price-to-earnings ratio drops in parallel, which can make the stock look cheaper.
The EPS bump is real but can be misleading. A buyback funded with excess cash is a different story from one funded with new debt. A debt-funded repurchase that lifts EPS while increasing leverage isn’t creating value the way a cash-rich company returning surplus capital is.
Executive Compensation and Buyback vs. Dividend Tax
Executive pay is where buybacks draw sharp criticism. Many compensation packages tie bonuses and long-term incentive awards to EPS targets. When a buyback lifts EPS by shrinking the share count rather than by growing profits, executives can hit those targets without improving the underlying business. A CEO whose bonus triggers at $12 EPS reaches that number either way, and the payout is identical. Buybacks can also support the stock price in the short term through buying pressure, which benefits executives holding options or equity grants.
For shareholders, buybacks and dividends carry different tax consequences. A dividend payment is fully taxable to the recipient, either as ordinary income or at the qualified dividend rate. In a buyback, only shareholders who actually sell owe tax, and they owe it only on the gain, because part of the proceeds is a recovery of cost basis. Shareholders who hold through the program owe nothing; they simply hold a slightly larger percentage of the company. That deferral is a large part of why buybacks appeal to tax-sensitive institutional holders and to executives with significant equity.
What Companies Must Disclose
Under Item 703 of Regulation S-K, companies must disclose repurchase activity in periodic SEC filings.8eCFR. 17 CFR 229.703 – Purchases of Equity Securities by the Issuer and Affiliated Purchasers A required table in each Form 10-Q and Form 10-K reports the total shares purchased each month, the average price paid per share, and the remaining capacity under the authorized program. Investors can pull the filings through the SEC’s EDGAR database.
In 2023, the SEC adopted a modernized disclosure rule that would have required daily rather than monthly reporting and new disclosures about the rationale behind repurchase programs. The U.S. Chamber of Commerce and other trade groups challenged it, and the Fifth Circuit found the SEC acted arbitrarily and capriciously. After the SEC failed to correct the identified defects within the court’s deadline, the Fifth Circuit vacated the rule.9U.S. Securities and Exchange Commission. Share Repurchase Disclosure Modernization Disclosure reverted to the pre-2023 framework, which remains in effect.
Companies must also disclose in their quarterly filings whether any officers or directors adopted or terminated Rule 10b5-1 trading plans during the reporting period, including the material terms.10U.S. Securities and Exchange Commission. Insider Trading Arrangements and Related Disclosures Buybacks executed through a 10b5-1 plan have to be identified as such, so investors can see whether insider trading protections were in place while the company was buying its own stock.