Stock Buyback EPS Impact Calculator
See how a share repurchase lifts earnings per share: enter net income, shares outstanding and the buyback amount to compare EPS before and after.
How it works
Shares repurchased = buyback ÷ price · New EPS = net income ÷ (shares − repurchased) · Old EPS = net income ÷ shares
A buyback raises earnings per share by shrinking the denominator, not by earning more. The company retires shares equal to the buyback amount divided by the price, and the same net income is then spread over fewer shares. This mechanically boosts EPS even when the underlying business is flat, which is why analysts separate buyback-driven EPS growth from genuine operating growth.
Worked example
A firm earns $100M on 50M shares — an EPS of $2.000. A $50M buyback at $20 retires 2.5M shares, leaving 47.5M. New EPS is 100M ÷ 47.5M = $2.105, a 5.3% increase, with no change in profit.
Frequently asked questions
Does a buyback create value?
It returns cash to shareholders and lifts EPS by reducing the share count, but it only adds value if the shares are bought below intrinsic value. Overpaying for stock destroys value even as it raises EPS.
Why does EPS rise if profit is unchanged?
EPS is net income divided by shares outstanding. A buyback lowers the share count while income stays the same, so the ratio increases purely from the smaller denominator.
How is this different from a dividend?
Both return cash to shareholders, but a dividend pays cash directly and does not change the share count, while a buyback reduces shares and raises per-share metrics like EPS. Buybacks are also more tax-flexible for many investors.
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