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Alternative Minimum Tax (AMT) Calculator

Estimate your Alternative Minimum Tax (AMT) liability under US tax rules.

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Calculation Parameters

Specify your inputs below.

Gross Annual Income ($)

Tax Exemptions / AMT Exemption ($)

AMT Tax Rate (%)

Calculated Result

AMT Taxable Income $103,700.00

Estimated AMT Liability $26,962.00

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Expert Tip

The AMT was designed to ensure high earners pay a baseline tax regardless of extensive standard deductions or tax write-offs.

How this Calculator Works

This calculator estimates if you are subject to the Alternative Minimum Tax (AMT) under US federal tax laws. The AMT limits certain tax deductions to ensure high-income taxpayers pay a minimum percentage of tax. It compares standard tax against the AMT threshold.

Formula & Methodology

Alternative Minimum Taxable Income (AMTI) = AGI + Tax Preferences - AMT Exemption Tentative Minimum Tax = AMTI * AMT Tax Rate AMT Liability = Tentative Minimum Tax - Regular Tax (if positive)

Step-by-Step Calculation Example

Here is a step-by-step example showing how the calculations are performed:

A taxpayer has a regular tax liability of $25,000, AMTI of $120,000, and an AMT rate of 26%. 1. Calculate tentative minimum tax: $120,000 * 0.26 = $31,200. 2. Subtract regular tax: $31,200 - $25,000 = $6,200. Result: The AMT liability is $6,200.

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