What is AMT tax?

TaxWarren TeamPublished April 25, 2026

Quick answer

AMT (Alternative Minimum Tax) is a parallel tax system that limits common deductions and applies flat rates of 26% or 28%. Designed to ensure high earners pay at least a minimum tax. After 2017 reform, far fewer taxpayers owe it.

AMT exemption thresholds and rates for 2025.

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