The alternative minimum tax for 2022 is a parallel calculation that disallows certain deductions, adds back specific income items, applies a 26 percent or 28 percent rate to what remains after an exemption, and requires you to pay whichever figure is larger, the regular tax or the AMT result. For the 2022 tax year, the exemption is $75,900 for single filers and heads of household, $118,100 for married couples filing jointly, and $59,050 for married filing separately. You report the calculation on Form 6251.
How the Parallel Calculation Works
The AMT runs as a second set of books. You figure your regular tax liability the usual way. Then you recalculate under AMT rules, which disallow certain deductions and add back specific types of income. The IRS requires you to pay whichever calculation produces the larger number.
Start with your regular taxable income, add back disallowed deductions and preference items, and you have your alternative minimum taxable income, or AMTI. Subtract your AMT exemption. Apply AMT rates to the balance. If the result exceeds your regular tax, the excess is your AMT liability and gets added to your return as an additional tax.1Internal Revenue Service. About Form 6251, Alternative Minimum Tax – Individuals
2022 Rates, Exemptions, and Phase-Outs
The AMT uses two rates. For 2022, the first $206,100 of taxable excess (AMTI minus your exemption) is taxed at 26 percent, and anything above that is taxed at 28 percent. For married individuals filing separately, the 26 percent rate applies to the first $103,050, with 28 percent on amounts above.2Internal Revenue Service. 2022 Instructions for Form 6251
The 2022 exemption amounts shelter a portion of AMTI from the tax:
- Single and head of household: $75,900
- Married filing jointly: $118,100
- Married filing separately: $59,050
Exemptions shrink at higher incomes. The 2022 phase-out begins at these AMTI levels:
- Single and head of household: $539,900
- Married filing jointly: $1,079,800
- Married filing separately: $539,900
The exemption drops by 50 cents for every dollar of AMTI above the phase-out threshold.3Office of the Law Revision Counsel. 26 U.S. Code 55 – Alternative Minimum Tax Imposed That is a steep taper. A single filer with AMTI of $691,700 loses the entire $75,900 exemption, because the $151,800 above the threshold at 50 percent wipes it out. Once the exemption is gone, your full AMTI faces AMT rates with no cushion.
Filing separately deserves a note. The exemption is half the joint amount and the phase-out threshold matches the single filer level, so couples who file separately hit AMT territory at considerably lower income than joint filers.
What Pushes 2022 Filers Into AMT
Several items get different treatment under AMT rules. These are the ones most likely to move a 2022 filer into paying it.
Incentive Stock Options
If you exercised incentive stock options during 2022, the spread between your exercise price and the stock’s fair market value counts as income for AMT purposes, even though you owe no regular tax on that spread until you sell the shares.4Office of the Law Revision Counsel. 26 USC 56 – Adjustments in Computing Alternative Minimum Taxable Income A large ISO exercise in a single tax year can generate a six-figure AMT bill even if you never sold a share.
State and Local Taxes
State and local taxes you deducted on Schedule A get added back for AMT purposes.4Office of the Law Revision Counsel. 26 USC 56 – Adjustments in Computing Alternative Minimum Taxable Income For 2022, the SALT deduction is already capped at $10,000 for regular tax, which limits the size of this add-back.
Depreciation Differences
Business owners and rental property investors who used accelerated depreciation must recalculate under the alternative depreciation system for AMT. The AMT version typically uses longer recovery periods, reducing your annual deduction and increasing AMTI.5Internal Revenue Service. Instructions for Form 6251 The gap between the two figures becomes an add-back on Form 6251.
Private Activity Bond Interest
Interest from certain private activity bonds issued after August 7, 1986 is tax-free for regular income tax but counts as a preference item under AMT.6Office of the Law Revision Counsel. 26 USC 57 – Items of Tax Preference Bonds issued by qualified 501(c)(3) organizations and certain housing bonds are exceptions that do not trigger this preference.
Standard Deduction
If you claimed the standard deduction rather than itemizing, that deduction is not allowed under AMT rules. The full amount gets added back when computing AMTI. For 2022, the standard deduction was $12,950 for single filers and $25,900 for married couples filing jointly. The add-back meaningfully raises AMTI, though on its own it will not usually push most filers into paying AMT.
Reporting It on Form 6251
Form 6251 is where the AMT calculation lives. The form walks through the sequence: start with regular taxable income, make the AMT adjustments and preference additions to reach AMTI, subtract the exemption (reduced or eliminated if you are in the phase-out range), and apply the 26 percent and 28 percent rates.2Internal Revenue Service. 2022 Instructions for Form 6251
The result is your tentative minimum tax. If it exceeds your regular tax, the difference is your AMT, and it goes on Schedule 2 (Form 1040), line 1 as an additional tax.5Internal Revenue Service. Instructions for Form 6251 You can file electronically or on paper. Payments can go through the Electronic Federal Tax Payment System or by check with the return.7Internal Revenue Service. Payments
Missing the payment deadline triggers a failure-to-pay penalty of 0.5 percent per month on the unpaid balance, up to a maximum of 25 percent.8Internal Revenue Service. Failure to Pay Penalty Interest accrues from the original due date.
Estimated Payments When AMT Is in the Picture
If you expected to owe AMT for 2022, that liability needed to be in your quarterly estimated payments. The IRS requires estimated payments when you expect to owe $1,000 or more after subtracting withholding and refundable credits, and AMT counts toward that threshold.9Internal Revenue Service. Estimated Tax Ignoring AMT in your estimated payments can produce an underpayment penalty even if you pay in full at filing.
For filers whose AMT comes from a one-time event like an ISO exercise, the annualized income installment method (Publication 505) lets you weight estimated payments toward the quarter when the income actually hit, rather than spreading it evenly. Using this method requires filing Form 2210 with Schedule AI to show the IRS why the quarterly payments were uneven.9Internal Revenue Service. Estimated Tax
Getting AMT Back Through the Minimum Tax Credit
Paying AMT in 2022 is not always permanent. The minimum tax credit, claimed on Form 8801, lets you recover AMT paid in prior years when your regular tax exceeds your tentative minimum tax in a later year.10Internal Revenue Service. Instructions for Form 8801
Only AMT caused by timing differences generates a credit. The IRS treats AMT triggers as either deferral items or exclusion items. Depreciation adjustments and ISO exercises are deferral items, because the income gets taxed under the regular system eventually; the AMT just accelerated it. The standard deduction add-back is an exclusion item, a permanent difference, so AMT from that source produces no future credit.10Internal Revenue Service. Instructions for Form 8801
The credit carries forward indefinitely. If your 2022 AMT bill was large, the credit waits until a year when your regular tax exceeds your tentative minimum tax, and then it is available to claim. Filers who paid AMT in 2022 and never went back to file Form 8801 in later years often leave the credit sitting unused.