Employee Stock Option Calculator
What are my startup stock options really worth?
Options give you the right to buy shares at a fixed strike price. They are worth something only if the company’s share price ends up above the strike.
How this calculator works
Vested options assume a standard one-year cliff, then even vesting. Gain per share = exit price − strike. Pre-tax value = vested options × gain; tax is applied to that gain. Tax rules for options differ widely by country.
Frequently asked questions
What is a vesting cliff?
Commonly no options vest in the first year; then 25% vest at once and the rest vest monthly or quarterly over the remaining period.
Should I exercise early?
It can reduce tax in some countries but means paying cash for shares that may become worthless. Get local tax advice before exercising.
Results are estimates based on the numbers you enter and simplified assumptions. They are not financial advice. See our disclaimer.