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Alternative Minimum Tax (AMT) Guide 2026

Tax information is for educational purposes only and does not constitute tax advice. Consult a licensed tax professional for your specific situation.

The Alternative Minimum Tax (AMT) is a parallel federal tax system designed to ensure that high-income individuals, estates, and trusts pay at least a minimum amount of tax, even if they have significant deductions and credits under the regular tax system. For 2026, the AMT exemption amounts and phase-out thresholds have been adjusted for inflation, continuing the elevated levels established by the Tax Cuts and Jobs Act. This guide explains how the AMT works, who is affected, and strategies for minimizing its impact.

AMT Exemption Amounts and Rates (2026)

Exemption Amounts

Filing Status	Exemption Amount	Phase-Out Threshold
Single / Head of household	~$88,100	~$609,350
Married filing jointly	~$137,000	~$1,218,700
Married filing separately	~$68,500	~$609,350
Estates and trusts	~$29,900	~$99,700

AMT Tax Rates

AMT Taxable Income	Rate
Up to ~$248,300 (married filing jointly) / ~$124,150 (single and MFS)	~26%
Over ~$248,300 / ~$124,150	~28%

How the AMT Works

Calculating AMT Income (AMTI)

The AMT starts with your regular taxable income and adds back certain deductions and preferences that the regular tax system allows but the AMT does not. Common AMT adjustments include:

State and local tax (SALT) deduction: Added back entirely for AMT purposes
Standard deduction: Not allowed under AMT (you must use AMT-specific exemption)
Personal exemptions: Not allowed under AMT
Incentive stock option (ISO) exercise: The bargain element (difference between exercise price and fair market value) is added to AMTI
Private activity bond interest: Tax-exempt interest from certain bonds becomes taxable under AMT
Accelerated depreciation: Differences between regular and AMT depreciation methods
Net operating loss: AMT-specific limitations apply

Applying the Exemption

After calculating AMTI, you subtract the applicable exemption amount. The exemption phases out at ~$0.25 for every ~$1 of AMTI above the phase-out threshold, eventually reaching zero for very high-income filers.

Comparing Regular Tax to AMT

You calculate your tax under both the regular system and the AMT system. If the AMT produces a higher tax, you pay the difference as additional tax (the “AMT liability”). The AMT is not a separate tax you pay instead of regular tax — it is the excess, if any, of the tentative minimum tax over regular tax.

Who Is Most Likely Affected

While the TCJA significantly reduced the number of AMT-affected taxpayers, certain situations still trigger AMT exposure:

Exercising incentive stock options (ISOs): The bargain element creates a large AMT adjustment that can trigger significant AMT liability in the year of exercise.
High state and local taxes: Although the SALT deduction is already capped at ~$10,000 for regular tax purposes, the entire SALT amount is disallowed under AMT.
Large capital gains: While long-term capital gains are taxed at the same preferential rates under AMT, the income can push you above the exemption phase-out threshold.
Private activity bond income: Municipal bond interest from private activity bonds is taxable under AMT.
Large miscellaneous deductions: Certain itemized deductions allowed under regular tax are added back for AMT.

AMT Credit (Form 8801)

If you pay AMT in one year due to timing differences (such as ISO exercises or depreciation adjustments), you may be able to claim a minimum tax credit in future years to offset your regular tax liability. The AMT credit is available for “deferral” preferences — timing items that will eventually reverse. It is not available for “exclusion” preferences like the SALT deduction.

File Form 8801 (Credit for Prior Year Minimum Tax) to claim any carryforward credit from prior AMT payments.

Comparison: Regular Tax vs. AMT

Feature	Regular Tax	AMT
Top rate	~37%	~28%
SALT deduction	Up to ~$10,000	Not allowed
Standard deduction	~$15,700 (single)	Not allowed
Personal exemptions	Not available (post-TCJA)	Not available
ISO exercise	Not taxed	Bargain element taxable
Long-term capital gains	Preferential rates	Same preferential rates
Tax-exempt bond interest	Exempt	Some bonds taxable

Tips for Minimizing AMT Exposure

Time ISO exercises carefully. If you hold incentive stock options, consider exercising in smaller batches across multiple years to keep the bargain element below the AMT exemption.
Monitor AMTI near phase-out thresholds. If your AMTI is between the exemption amount and the phase-out complete point, each additional dollar of income can effectively be taxed at ~32.50% to ~35% due to the exemption phase-out.
Avoid private activity bonds. If AMT is a concern, choose general obligation municipal bonds instead of private activity bonds.
Accelerate or defer income strategically. Shifting income between years can keep you below AMT thresholds in any single year.
Claim the AMT credit. If you paid AMT in a prior year due to timing items, file Form 8801 to recover some of that tax.
Use tax software or a professional. AMT calculations are complex, and tax software can quickly determine whether you are at risk.
Review annually. Because the AMT exemption is indexed for inflation, your AMT exposure can change from year to year even if your income stays stable.

Key Takeaways

The AMT is a parallel tax system that adds back certain deductions and applies rates of ~26% and ~28%.
For 2026, the AMT exemption is ~$88,100 (single) and ~$137,000 (married filing jointly).
The exemption phases out at ~$0.25 per dollar above the phase-out threshold.
Incentive stock option exercises are the most common trigger for AMT liability.
The AMT credit can recover prior AMT payments caused by timing differences.
The TCJA’s elevated exemption amounts have significantly reduced the number of affected taxpayers.

Next Steps

Federal Income Tax Guide 2026 — Understand how regular tax and AMT interact.
State Income Tax Rates Comparison 2026 — Some states have their own AMT provisions.
Tax Bracket Calculator — Estimate your regular tax and potential AMT exposure.
Self-Employment Tax Guide — AMT considerations for business owners with ISOs.
Find a CPA Near You — Get professional AMT planning advice.