Quick answer
A stock split increases the number of shares without changing shareholders' equity, so the price per share falls in proportion and your total stays the same. A buyback is the company purchasing its own shares, which reduces the shares outstanding and raises each remaining share's slice of earnings [1] [2].
Key points
- A split changes the number of shares, not the value of the company or of your holding.
- A reverse split combines shares, often to lift a low share price.
- A buyback spends company cash to reduce the number of shares outstanding.
- With fewer shares, the same profit gives higher earnings per share.
- Since 2023, covered US public companies pay a 1% excise tax on repurchased stock.
#What is a stock split?
Investor.gov defines a stock split as an increase in the number of shares of a corporation's stock without a change in the shareholders' equity [1]. The company is cut into more slices, but the cake is the same size. Companies often split to make each share more affordable, and a split does not dilute existing owners because everyone receives new shares in the same proportion [1].
Investor.gov's own example: if you own 100 shares at $100 and the company declares a two-for-one split, you have 200 shares at $50 immediately after the split [1]. If the company pays dividends, the dividend per share also falls proportionately [1], so your total dividend is unchanged. A split on its own is therefore not a sign that the company has become more valuable; see market capitalization for how total company value is measured.
Worked example
Your holding before and after a split
You own 100 shares at $100 each. The company pays a $1.00 dividend per share each year.
- Before: value (100 × $100)
- $10,000
- 2-for-1 split: 200 shares × $50
- $10,000
- 3-for-1 split: 300 shares × $33.33
- about $10,000
- Yearly dividend before (100 × $1.00)
- $100
- Yearly dividend after 2-for-1 (200 × $0.50)
- $100
More shares, lower price per share, same total value and same total dividend. The split by itself creates no gain or loss.
Hypothetical figures calculated in Python. After the split the market price keeps moving like any other day.
#How does a reverse stock split work?
A reverse split runs the other way. Each outstanding share is converted into a fraction of a share; in a one-for-ten reverse split, every ten shares become one, so a holder of 10,000 shares ends up with 1,000 [3]. Companies typically do this to raise a share price seen as too low, or to meet an exchange's minimum bid price requirement [3].
Investor.gov warns that investors may lose money from price fluctuations after reverse splits, and that some reverse splits cash out small shareholders by turning fractional shares into cash [3]. A reverse split does not fix the business; it changes the label on the price.
#What is a stock buyback?
In a buyback (or share repurchase), a company uses its own cash to buy its shares. Repurchases can be made gradually in the open market. The SEC's Rule 10b-18 gives issuers a voluntary safe harbor from manipulation liability when their open-market repurchases meet conditions on manner, timing, price and volume — including a daily limit of 25% of the stock's average daily trading volume [2].
A company can also make an issuer tender offer: a public offer to buy back a substantial percentage of its shares for a limited time, usually at a premium to the current market price to encourage holders to sell [4]. Each shareholder decides whether to take part [4].
Split vs buyback
Stock split
- More shares, lower price per share
- No cash leaves the company
- Your ownership percentage is unchanged
- EPS falls in proportion to the new share count
- Total value of your holding: unchanged by the split itself
Buyback
- Fewer shares outstanding
- Company cash is spent
- If you keep your shares, your percentage rises slightly
- EPS rises if profit stays the same
- Selling shareholders receive cash
#Why do buybacks raise earnings per share?
Earnings per share is net profit divided by the number of common shares [5]. A buyback shrinks the denominator. If profit stays the same, each remaining share's slice of profit gets bigger. That is arithmetic, not new profit: the company has also spent cash that could have been used to pay dividends, pay down debt or invest in the business.
Worked example
The arithmetic of a buyback
A hypothetical company earns $100 million a year and has 50 million shares. It spends $200 million buying back shares at $40 each. You own 1,000 shares and do not sell.
- EPS before ($100M ÷ 50M shares)
- $2.00
- Shares repurchased ($200M ÷ $40)
- 5,000,000
- Shares outstanding after
- 45,000,000
- EPS after, same profit ($100M ÷ 45M)
- $2.2222 (+11.11%)
- Your ownership before (1,000 ÷ 50M)
- 0.002%
- Your ownership after (1,000 ÷ 45M)
- 0.002222%
- US excise tax on the repurchase (1% × $200M)
- $2,000,000
EPS rises because there are fewer shares, not because the business earned more. Whether the buyback helped owners depends on the price paid and what else the cash could have done.
Hypothetical figures calculated in Python. Profit is held constant for clarity; in reality spending cash can reduce interest income.
#Are buybacks taxed in the US?
Yes, at the company level. The Inflation Reduction Act of 2022 created a stock repurchase excise tax under section 4501 of the Internal Revenue Code. It is 1% of the fair market value of stock repurchased during the tax year, applies to certain publicly traded corporations, and covers repurchases after December 31, 2022 [6]. Companies report it on Form 7208 [6]. For shareholders who sell into a buyback, ordinary capital gains rules apply.
| Action | Share count | Price per share | Cash leaves the company? |
|---|---|---|---|
| 2-for-1 split | Doubles | Roughly halves | No |
| 1-for-10 reverse split | Divided by 10 | Roughly ×10 | No (small holders may be cashed out) |
| Buyback | Falls | Set by the market | Yes |
Common beginner mistakes
Thinking a split makes you richer
After a 2-for-1 split you own twice the shares at half the price. Your holding is worth the same.
Reading a reverse split as good news
Reverse splits are often used to lift a low price or keep an exchange listing. Look at why the price was low.
Treating higher EPS from buybacks as growth
If EPS rises only because the share count fell, the business itself has not grown. Compare net income, not just EPS.
Ignoring the price paid in a buyback
Buying back shares at a high price uses more cash per share retired. The same $200M retires fewer shares at $80 than at $40.
What's the bottom line?
Splits and reverse splits change how a company is sliced, not what it is worth, while buybacks move cash out of the company to reduce the share count and lift each remaining share's slice of earnings. Judge any of them by the business underneath: profit, cash and the price paid. Next, see how EPS feeds into the P/E ratio, or read how dividends work for the other main way companies return cash.
Frequently asked questions
Do I have to do anything when a stock splits?
Usually not. Your broker updates the number of shares and the price per share in your account automatically. The total value should be the same right after the split.
Is a buyback better than a dividend?
Neither is better in general. A dividend pays cash to every shareholder; a buyback pays cash only to those who sell and increases the remaining holders' share of the company. The choice and its tax effects differ by company and by investor.
Why would a company do a reverse split?
Typically to raise a share price seen as too low to attract investors, or to meet an exchange's minimum bid price requirement.
Do buybacks always push the share price up?
No. A buyback adds a buyer, but the share price depends on many things, including the company's results and the wider market. Prices can fall during or after a buyback.
Sources
Grade A = primary source (regulator, government agency, official rulebook or the index provider's own documents). Numbers in brackets in the text point here.
- U.S. SEC — Investor.gov. Stock Split (glossary) (2026). Accessed 2026-10-03.A
- U.S. Securities and Exchange Commission. Division of Trading and Markets: Answers to Frequently Asked Questions Concerning Rule 10b-18 ("Safe Harbor" for Issuer Repurchases) (2026). Accessed 2026-10-03.A
- U.S. SEC — Investor.gov. Reverse Stock Splits (glossary) (2026). Accessed 2026-10-03.A
- U.S. SEC — Investor.gov. Tender Offer (glossary) (2026). Accessed 2026-10-03.A
- U.S. SEC — Investor.gov. Earnings Per Share (glossary) (2026). Accessed 2026-10-03.A
- Internal Revenue Service. About Form 7208, Excise Tax on Repurchase of Corporate Stock (2026). Accessed 2026-10-03.A
This page is general education, not personal financial, tax or legal advice. Figures in worked examples are hypothetical and calculated before taxes and fees unless stated. Rules and limits change; check the linked primary sources for the current version. How we check every page.
