Know what exercising your stock options will cost before you do it.

Enter your salary and your ISO grant. See this year's alternative minimum tax, the cash you need, and how many shares you can exercise without paying AMT at all.

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A worked example

Single filer earning $200,000 exercising 4,000 ISOs at a $1 strike while the shares are worth $16.

AMT this year

$7,440

Cash needed in total

$11,440

Shares with no AMT at all

2,092

2026 tables

What the calculator shows

AMT this year

The extra federal tax an ISO exercise triggers, from the published IRS tables, with every figure explained.

Your no-AMT limit

The most shares you can exercise this year without owing any AMT, found exactly rather than estimated.

Cash needed

The strike price you pay plus the extra tax, so you know what to set aside.

Private by design

Your salary and grant details never leave your device. There is no account, and nothing is stored on a server.

Plan several years ahead

The planner compares five exercise strategies over several years within your cash budget, then simulates thousands of company outcomes to show the chance you lose the cash you put in.

Open the planner