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Calcimator

AMT Calculator

Calculate your Alternative Minimum Tax (AMT) liability based on income, SALT deductions, ISO stock option exercises, and filing status using current-year federal brackets and 2024 AMT exemption parameters.

Inputs

$
$
$
$

Results

AMT Owed

$0.00

Total Federal Tax$51,304.00
Effective Tax Rate20.52%
AMT Income (AMTI)$243,900.00
AMT Exemption Used$85,700.00
Tentative Minimum Tax$41,132.00
Regular Tax$51,304.00
How to Use This Calculator
  1. Enter Total Income including wages, salary, and ordinary income before deductions.
  2. Select Filing Status to apply the correct AMT exemption amount.
  3. Enter State & Local Taxes paid — SALT deductions are added back for AMT purposes.
  4. Set ISO Exercise Spread if you exercised incentive stock options — this is a major AMT preference item.
  5. Enter Other AMT Preferences (private-activity bond interest, depletion).
  6. Review AMT Owed — if positive, you pay this in addition to regular tax. Consider timing ISO exercises to minimize AMT.

What each input means

Total Income ($)
Your total W-2 wages, salary, and ordinary income before deductions. Regular tax uses current-year federal brackets; AMT exemptions are pinned to 2024 (IRS Rev. Proc. 2023-34) pending an AMT reference-data module.
Filing Status
Your federal filing status determines exemption amounts and bracket thresholds.
State & Local Taxes ($)
Total state income tax + property tax. The regular tax caps SALT at $10,000; AMT adds back what was deducted.
ISO Exercise Spread ($)
Bargain element from exercising incentive stock options (FMV minus exercise price). This is an AMT preference item.
Other AMT Preferences ($)
Other AMT adjustments such as private-activity bond interest, depletion, or intangible drilling costs.

What each result means

AMT Owed
Additional tax above your regular tax liability due to AMT.
Total Federal Tax
Regular tax plus any AMT owed.
Effective Tax Rate
Total tax as a percentage of total income.
AMT Income (AMTI)
Your income after AMT adjustments and preferences are added back.
AMT Exemption Used
Your AMT exemption after phase-out reduction.
Tentative Minimum Tax
Tax computed under AMT rules before comparing to regular tax.
Regular Tax
Your regular federal income tax liability.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Total Income ($) = 250000, Filing Status = 0, State & Local Taxes ($) = 25000, ISO Exercise Spread ($) = 0 = 5 input(s) provided
  2. Calculate AMT Owed
    AMT Owed
    0 = $0
  3. Calculate Total Federal Tax
    Total Federal Tax = regularTax + amtOwed
    51304 = $51,304
  4. Calculate Effective Tax Rate
    20.52 = 20.52%

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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