AMT Calculator Alternative Minimum Tax Tool

What is the Alternative Minimum Tax?

The Alternative Minimum Tax (AMT) is a parallel tax system created to ensure that high-income taxpayers pay a minimum level of tax. It applies when certain exemptions and deductions reduce a taxpayer’s liability under the standard income tax system. Instead of these deductions, AMT calculates taxable income by adding them back and applying a flat rate, typically 26% or 28%.

This calculator helps you estimate your AMT liability by entering your gross income, standard deductions, SALT, and other adjustments. The goal is to give you a simplified preview of whether you may owe AMT in addition to regular tax.

By using this tool, individuals who earn over $150,000 and frequently claim deductions for mortgage interest, state/local taxes, or exercise incentive stock options can get ahead of any unexpected liabilities.

The AMT system is designed to kick in once your income exceeds a specific threshold and you’ve claimed deductions that significantly lower your effective tax. You can use this tool to make better financial decisions, such as reducing discretionary deductions or exercising stock options at favorable times.

This tool is based on simplified rules and general thresholds. For a detailed and accurate AMT assessment, please consult a tax professional or review IRS Form 6251.

Start by entering your estimated income and deduction values above. This single-page tool is fast, free, and doesn’t collect or store any user data. You can modify values and instantly view updated tax results.

Whether you're a salaried professional, a stock option holder, or a high-net-worth individual, this AMT calculator gives you a clearer view of your potential tax exposure.