Alternative Minimum Tax Estimator

The AMT is a parallel tax system designed to ensure high-income taxpayers pay at least a minimum rate. You calculate tax under both the regular system and the AMT system and pay whichever is higher. The AMT disallows certain deductions (like SALT) and adds back preference items (like ISO spreads). For 2025 the exemption is $88,100 (single) or $137,000 (married), phasing out at higher incomes.

Filing Status

Regular Taxable Income ($)

Regular Tax (from tax table or prior calculation) ($)

AMT Preference Items (Add-Backs)

SALT Deducted (state/local taxes) ($)

Miscellaneous Itemized Deductions ($)

ISO Bargain Element (exercise − strike price) ($)

Accelerated Depreciation (AMT adjustment) ($)

Private Activity Bond Interest ($)

Percentage Depletion Excess ($)

AMT Credits

AMT Credit Carryforward from Prior Years ($)

Regular Taxable Income

Total AMT Preference Add-Backs

AMTI (before exemption)

AMT Exemption (2025)

AMT Base (AMTI − exemption)

Tentative Minimum Tax (26%/28%)

Regular Tax

AMT Credit Applied

AMT Owed (excess over regular tax)

Total Tax (regular + AMT)

AMT Status