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AMT Calculator

Calculate whether you owe Alternative Minimum Tax and how much additional tax liability you may face.

Quick answer: Calculate the Alternative Minimum Tax using the real AMT formula: AMT taxable income minus a phased-out exemption, taxed at 26% or 28%, owed only if it exceeds regular tax liability. Enter Alternative Minimum Taxable Income (AMTI), Regular Federal Tax Liability, and Filing Status to personalize the estimate. It returns Estimated Additional AMT, 2026 AMT Exemption, and Tentative Minimum Tax so you can compare the impact before choosing a next step. Use it to estimate tax impact, withholding, deduction, bracket, and after-tax cash-flow tradeoffs.

SWReviewed by SwitchWize Research Desk · Last reviewed July 20, 2026
Estimated Additional AMT
$0
Estimated Additional AMT
$0
2026 AMT Exemption
$90,100
Tentative Minimum Tax
$41,574
What to do next

Plan your tax strategy

Your action plan
  1. 1

    Set the target and timeline for this plan

    Calculate the Alternative Minimum Tax using the real AMT formula: AMT taxable income minus a phased-out exemption, taxed at 26% or 28%, owed only if it exceeds regular tax liability.

  2. 2

    Check the assumptions before using the result for a high-stakes decision

    Assumptions change the answer, especially when rates, taxes, or timing matter.

  3. 3

    Save the result to Money Map or use the linked next action

    Turn the result into a prioritized action instead of treating it as a one-off number.

Plan your tax strategy

This is an educational estimate, not tax, legal, investment, or lending advice. Confirm with a qualified professional or the provider before acting.

Calculator action path

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Self-Employed Taxes Explained: What You Owe and How to PaySelf-employed workers pay self-employment tax (Social Security + Medicare) plus income tax, and must send quarterly estimated payments or face penalties. Here's the full picture for freelancers, contractors, and sole proprietors.
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Frequently Asked Questions

Everything you need to know.

What does an example AMT Calculator calculation look like?
Using this calculator's own default assumptions, a alternative minimum taxable income (amti) of $250,000, regular federal tax liability of $45,000 and filing status of Single or head of household produces an estimated estimated additional amt of $0 and 2026 amt exemption of $90,100. Enter your own numbers above to see how it changes for your situation.
What is AMTI and how does it differ from regular taxable income?
AMTI starts with your regular taxable income but adds back certain deductions and preferences (such as state and local tax deductions, mortgage interest on refinanced loans, and depreciation adjustments) that are disallowed or treated differently under the AMT system. This recalculation creates a separate tax base designed to limit the impact of tax-preference items on your overall tax burden.
Why do I only owe AMT if it exceeds my regular tax?
The AMT is a backstop designed to ensure minimum tax payment, not to replace your regular tax. You pay whichever is higher (your regular federal tax or your tentative minimum tax), so you only owe additional AMT if the minimum tax system produces a larger bill. This prevents the AMT from being punitive when your regular tax is already substantial.
Is the AMT Calculator free to use?
Yes. SwitchWize calculators are free, and you do not need an account to run scenarios or view the result.
Does using the AMT Calculator affect my credit score?
No. Using a calculator does not trigger a credit check. A credit impact can occur only if you apply directly with a lender, card issuer, or provider.
Are the results personalized financial advice?
No. Calculator outputs are educational estimates based on the inputs you enter. Review assumptions and confirm terms directly with providers before making a financial decision.
What should I do after seeing the result?
Use the recommendation module on this page to plan your tax strategy, or run Money Map to compare this taxes decision with your other opportunities.
How does SwitchWize choose related offers?
Related offers are matched by the calculator surface (taxes) and ranked using SwitchWize data such as rate, fees, trust signals, product fit, and switching friction. Paid relationships do not change organic ranking order.
How fresh are the rates and offers shown?
Rate and offer data is reviewed on a recurring cadence and every offer module shows review context or links to the methodology and disclosure pages.
Where can I see the ranking methodology?
The SwitchWize methodology page explains how rate freshness, editorial review, affiliate disclosure, and category ranking factors work.
Can Money Map use this result?
Yes. Money Map is the broader diagnostic path: it compares savings, mortgage, cards, and debt so you can see whether this calculator result is your highest-impact next move.

Why This Matters

The Alternative Minimum Tax ensures high-income earners pay a minimum level of tax regardless of deductions and credits used. Your AMT obligation depends on whether your tentative minimum tax exceeds your regular federal tax liability, a calculation that requires applying a separate tax system with its own rates and exemptions. Understanding this potential additional liability helps you plan for year-end tax payments and charitable or business deductions.

How to Use It

  1. 1Enter your Alternative Minimum Taxable Income (AMTI), which is your regular taxable income adjusted for specific AMT preference items and adjustments.
  2. 2Enter your Regular Federal Tax Liability, the total federal income tax you owe under the standard tax calculation.
  3. 3Select your Filing Status to determine the correct AMT exemption amount for your situation.
  4. 4Review the three results: your 2026 AMT Exemption amount, your Tentative Minimum Tax calculated at the applicable rates, and your Estimated Additional AMT: the difference you owe if it exceeds zero.
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Plan your tax strategy