ISO AMT Calculator
Free ISO AMT calculator: model the bargain element (spread) from incentive stock option exercise and tentative AMT vs regular tax—simplified educational model (Form 6251–style logic).
The ISO AMT Trap
Exercising ISOs with large spreads can trigger AMT on paper gains you can't yet realize. You may owe six-figure tax bills on illiquid shares (pre-IPO, lockup period, etc.).
ISO AMT calculator inputs and results
ISO Exercise Details
Enter your income and ISO exercise information
Related guides
Go deeper on the rules and planning ideas behind this calculator.