Equity option estimate

Stock Option Value Calculator

Estimate intrinsic value from strike price and market price.

Intrinsic value is not full option value

Private-company liquidity, expiration, vesting, AMT, exercise timing and market risk can change the real value of options.

Example

If you hold 2,000 options with a 12 strike price and a 30 market price, gross intrinsic value is (30 - 12) x 2,000 = 36,000. With a 35% estimated tax rate, the simplified after-tax estimate is 23,400.

How to use the result

Use the result to understand the spread between strike and market price. Before exercising, check expiration dates, vesting, liquidity, tax treatment and whether shares can actually be sold.

Limitations

This is not tax, legal or investment advice. It does not value time value, volatility, private-company discounts, AMT, country-specific tax rules or employer plan restrictions.

Last reviewed: 2026-05-17

Before relying on this result

Use this calculator together with the formula, assumptions, limitations and examples on the page. If the topic involves health, tax, lending, investment, legal, safety or current-rate decisions, treat the number as an estimate and check the relevant primary source or professional guidance.

Calculator metadata last reviewed: 2026-05-14.