Estimate US alternative minimum tax for 2026 using the AMT exemption and rates.
Please do not make financial decisions based on these results.
What is the AMT Calculator?
Estimate US alternative minimum tax for 2026 using the AMT exemption and rates. To use the AMT Calculator, enter alternative minimum taxable income, regular tax, filing status; it returns amt owed (extra tax), tentative minimum tax, exemption after phase-out, and shows them instantly as you type.
Where the AMT Calculator fits
Estimate US alternative minimum tax for 2026 using the AMT exemption and rates. The main figure it returns is the AMT owed (extra tax), worked out from the values you enter.
It belongs with the other tax & salary tools. If you are comparing options or checking a result from another angle, try the Estate Tax Calculator, Child Tax Credit Calculator or the State Tax Calculator.
How to use the AMT Calculator
- Enter your numbers. The inputs are Alternative minimum taxable income ($), Regular tax ($). Use the tax year and filing status that apply to you, and gross figures unless a field says otherwise. Fields marked optional can stay at zero.
- Choose your options. Filing status change how the result is worked out, and the form updates to match your choice.
- Read the result. The highlighted box gives the AMT owed (extra tax), and the cards below show Tentative minimum tax, Exemption after phase-out. Tables and charts break it down further.
- Test other scenarios. Results update as you type. Change one value at a time to see what drives the answer, and press Reset to go back to the defaults.
Formula and how it works
Example with real numbers
Here is the AMT Calculator using the default values shown in the calculator above:
Inputs
| Alternative minimum taxable income ($) | 320,000 |
|---|---|
| Regular tax ($) | 62,000 |
| Filing status | Single |
Results
| AMT owed (extra tax) | $0.00 |
|---|---|
| Tentative minimum tax | $59,774.00 |
| Exemption after phase-out | $90,100.00 |
With these inputs the calculator returns AMT owed (extra tax): $0.00. Change any value in the calculator to see how the result moves.
What if you change one input?
Sensitivity check: raising Alternative minimum taxable income ($) from 320,000 to 384,000 (about 20% higher) and leaving everything else as in the example above changes the results like this:
| Result | Example | After the change | Change |
|---|---|---|---|
| AMT owed (extra tax) | $0.00 | $15,402.00 | 0% |
| Tentative minimum tax | $59,774.00 | $77,402.00 | +29.5% |
| Exemption after phase-out | $90,100.00 | $90,100.00 | 0% |
The input that moves the result most is the one to check twice. Change it in the calculator above to test your own case.
What the results tell you
The results panel of the AMT Calculator reports AMT owed (extra tax), tentative minimum tax and exemption after phase-out. Compare these figures while changing one input at a time, and use the related calculators below to look at the same situation from another angle.
Method and limits. This calculator applies the formula in the section above to your inputs, in your browser; nothing you enter is stored on our servers. Tax rules change every year and depend on your full situation (state, filing status, credits), so treat the result as an estimate and confirm it with the IRS or a tax professional. It is for information, not financial, tax or legal advice.
Frequently asked questions
What is the 2026 AMT exemption?
$90,100 for single filers and $140,200 for married filing jointly, phasing out at 50 cents per dollar above $500,000 and $1,000,000.
Which tax year and rates are used?
US federal brackets and standard deductions for 2026 and 2025, plus FICA. State tax is a rate you enter.
Is this tax advice?
No. Please do not make tax decisions based on these results. Use a tax professional for your actual return.
Are the results guaranteed?
No. Results depend entirely on the numbers you enter and the formulas shown on this page. Please do not make financial decisions based on them alone; confirm important figures with a licensed professional.
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