Alternative Minimum Tax Calculator 2026 - Free AMT Calculator
Calculate your 2026 AMT with our free calculator. Determine if you owe Alternative Minimum Tax with new $500K/$1M thresholds and 50% phaseout rate.
Calculate your 2026 Alternative Minimum Tax instantly with NEW thresholds and phaseout rates. Our comprehensive AMT calculator helps high earners navigate the parallel tax system with updated $500K/$1M phaseout thresholds and 50% phaseout rate.
AMT Calculation Details
AMT Results
AMT Owed
$0
Total Tax Liability
$65,000
AMT Calculation Breakdown
Regular taxable income:$300,000
Plus AMT adjustments:$50,000
Plus AMT preferences:$10,000
AMTI (before exemption):$360,000
Minus AMT exemption:-$140,200
Taxable AMTI:$219,800
AMT rate:26% / 28%
Tentative Minimum Tax:$57,148
Regular tax:$65,000
AMT owed:$0
2026 AMT Parameters
Exemption Amount:
- • Single: $90,100
- • Married Joint: $140,200
Phaseout Threshold (NEW 2026):
- • Single: $500,000
- • Married Joint: $1,000,000
- • Phaseout rate: 50% (increased from 25%)
AMT Rates:
- • 26% on first $244,500
- • 28% on excess over $244,500
Understanding the Alternative Minimum Tax (AMT)
The Alternative Minimum Tax is a parallel tax system designed to ensure high-income taxpayers pay a minimum amount of tax, even if they have significant deductions and credits. The 2026 changes under the OBBBA significantly impact AMT calculations.
2026 AMT Changes (MAJOR UPDATE)
Critical Changes Under OBBBA:
- Phaseout thresholds REDUCED: Now $500K (single) / $1M (married) - down from $625K/$1.25M
- Phaseout rate DOUBLED: Now 50% (up from 25%)
- More taxpayers affected: Lower thresholds mean more people subject to exemption phaseout
- Faster phaseout: Doubled rate means exemption disappears twice as fast
2026 AMT Parameters:
- Single exemption: $90,100
- Married exemption: $140,200
- Phaseout begins: $500,000 (single) / $1,000,000 (married)
- Phaseout rate: 50% (NEW - doubled from 25%)
- AMT rates: 26% and 28%
Who Gets Hit by AMT?
High-Risk Groups:
- Earners with $200K-$1M income
- High state tax payers (California, New York, New Jersey)
- Incentive Stock Option (ISO) exercisers
- High property tax payers
- Large families with many exemptions (pre-TCJA)
- Private activity bond interest holders
Use our calculator above to determine your AMT liability with the new 2026 rules.
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