Share Buyback
A share buyback is when a company buys back its own shares, reducing the number outstanding. With fewer shares, each remaining share owns a bigger slice of profits, which usually lifts earnings per share.
Companies with spare cash can pay dividends — or buy their own stock. Buybacks have become one of the biggest uses of corporate cash. They can reward shareholders tax-efficiently, but critics say they can also flatter earnings or waste money at high prices. This entry explains how buybacks work, their effect on EPS and how to judge them.
- Category
- Fundamentals and Macroeconomics
- Reading time
- 3 min
- Also called
- Stock buyback, Share repurchase, Stock repurchase
- Updated
Buybacks in plain words
A stock buyback is a company's purchase of its own outstanding stock, usually to raise earnings per share.1
Buyback methods reduce the number of shares outstanding and support the price of the remaining shares.2
Fewer shares mean each one represents a larger share of the company. See Shares Outstanding.
How a buyback works, step by step
Board approves
A dollar amount or share count.
Choose a method
Open market purchases or a tender offer.
Shares are bought
Over weeks or months.
Shares are retired
Or held as treasury stock.
EPS rises
Same profit, fewer shares. See Earnings per Share.
Judge the price paid
Buying cheap creates value; buying dear destroys it.
Worked examples
Example 1 — EPS boost
+11% EPSNet income $100m, shares fall from 50m to 45m after a buyback.
| EPS before | $100m ÷ 50m = $2.00 |
| EPS after | $100m ÷ 45m ≈ $2.22 |
Buybacks are usually aimed at raising earnings per share.1
Example 2 — Ownership increase
Bigger sliceYou own 1m shares; total shares drop from 100m to 90m.
| Before | 1% |
| After | 1m ÷ 90m ≈ 1.11% |
Reducing shares outstanding increases each remaining holder's stake.2
Example 3 — Overpaying
Value destroyedA company spends $1bn buying stock at $120; a year later it trades at $70.
| Value of shares bought | ≈ $583m |
| Value lost | ≈ $417m |
Buybacks at inflated prices can destroy shareholder value. See Intrinsic Value and Time Value.
Buybacks vs dividends
| Aspect | Buybacks | Dividends |
|---|---|---|
| Cash to shareholders | Only those who sell | All holders |
| Flexibility | Easy to pause | Cuts are punished |
| Tax (many countries) | Often deferred | Taxed when paid |
| EPS effect | Raises EPS | None directly. See Dividend |
Why companies buy back shares
Returning excess cash
When there are few better uses. See Free Cash Flow.
Signalling undervaluation
Management thinks shares are cheap.
Offsetting dilution
From employee stock awards. See Share Dilution.
Takeover defence
Reducing shares available. See Poison Pill.
Advantages and disadvantages
Advantages
- Raises EPS and ownership per share.
- Flexible way to return cash.
- Often tax-efficient.
Disadvantages
- Can be done at bad prices.
- Can flatter EPS without real growth.
- May use debt and weaken the balance sheet.
Going deeper
Read as far as you need. Each level builds on the one before it.
Two main methods
Beginner
Companies use different buyback methods, such as buying in the open market or making a tender offer to shareholders.2
EPS isn't value
Intermediate
Higher EPS from fewer shares doesn't mean the business grew; compare with total profit growth. See Net Income.
Debt-funded buybacks
Advanced
Borrowing to buy back shares raises leverage and interest costs, increasing risk in downturns. See Interest Coverage Ratio.
Common mistakes
Treating EPS growth as business growth
Check net income.
Ignoring the price paid
Expensive buybacks waste cash.
Overlooking dilution offsets
Some buybacks just cancel stock awards.
Ignoring debt
Leveraged buybacks add risk.
Check your understanding
Test yourself before moving on. Each answer comes with an explanation.
Key points to remember
- A buyback is a company purchasing its own shares.
- It reduces shares outstanding.
- EPS and ownership per share rise.
- Value depends on the price paid.
- Debt-funded buybacks add risk.
Frequently asked questions
Are buybacks good for shareholders?
Why do buybacks raise share prices?
Are buybacks taxed?
Further learning
- Earnings per Share
The metric buybacks lift.
- Dividend
The alternative payout.
- Share Dilution
The opposite effect.
- Free Cash Flow
What funds buybacks.
Sources
This article is written in our own words. The sources below support the specific facts, rules and figures marked with a number in the text. Links open the original publisher’s page.
- Nasdaq. Stock buyback (glossary) (opens in a new tab) Checked .
- Corporate Finance Institute. Stock Buyback Methods (opens in a new tab) Checked .
Educational content, not financial advice. Examples use hypothetical prices and simplified costs; actual fees, margin rules and regulations vary by broker, market and country. We are not affiliated with any publisher linked above. Last reviewed . Report an error or request a source credit.