Form 6251 Alternative Minimum Tax—Individuals
Checklist for 2015 Tax Year
Form 6251 calculates whether you owe alternative minimum tax under 2015 rules, using income adjustments, preferences, and exemption amounts specific to that year. The 2015 tax year reflects pre–Tax Cuts and Jobs Act rules, including AMT phaseout thresholds tied to the consumer price index and filing status.
Form Purpose and 2015 Context
The 2015 AMT calculation applies year-specific exemption amounts, phaseout thresholds, and rate brackets that differ from those of surrounding years. If your tentative minimum tax exceeds your regular income tax reported on Form 1040, the AMT liability is triggered.
This determination is made directly by the form based on the calculations and thresholds defined in the 2015 instructions. All entries on Form 6251 follow the 2015 instructions, including year-specific thresholds, definitions, and calculation methods.
Step-by-Step Completion Checklist
Step 1: Identify Your 2015 Filing Status and Exemption Amount
Determine your filing status as reported on Form 1040, since filing status controls exemption phaseout and AMT thresholds. Locate the 2015 AMT exemption amount applicable to your status, including married filing jointly or married filing separately, using the Form 6251 instructions. Record this inflation-adjusted amount on line 29.
Step 2: Enter Your 2015 Taxable Income Starting Point
If you itemized deductions, enter the amount from Form 1040, line 41, on Form 6251, line 1, as your AMT starting figure. If you did not itemize and relied on the standard deduction calculation, enter the amount from Form 1040, line 38. This starting point determines which itemized deductions and tax benefits require AMT adjustment.
Step 3: Calculate Adjustments for 2015 Tax Preferences
Review all preference items listed on lines 2 through 27 of Form 6251 to identify applicable adjustments. The instructions specify which income items, tax deduction amounts, credits, and exclusions affect AMT calculations for 2015. Common adjustments involve depreciation, net operating loss deductions, passive activity losses, and itemized deductions disallowed under
AMT rules.
- State and local income, real estate, and sales taxes claimed as itemized deductions
- Charitable deductions generally remain allowed, but you must confirm proper
- Medical expenses require entering the smaller of Schedule A, line 4, or 2.5 percent of
Step 4: Adjust for Itemized Deductions (Lines 2–6)
If you claimed itemized deductions on Schedule A for 2015, review Form 6251 lines 2 through 6 carefully. The AMT requires add-backs for state and local income, real estate, and sales tax deductions, and limits certain mortgage interest and miscellaneous deductions. Medical expense adjustments follow a separate AMT calculation threshold unique to 2015. require a full add-back under AMT rules. classification on Schedule A.
Form 1040, line 38, if the applicable age rule applies.
Step 5: Account for Tax-Exempt Interest (Line 12)
Enter tax-exempt interest on line 12 if it arises from private activity bonds or private activity municipal bonds. Interest from certain municipal bonds is an AMT preference even though it remains excluded from regular taxable income. The 2015 instructions explain how to distinguish qualifying private activity bond interest from other municipal bond interest.
Step 6: Review Passive Activity Loss Adjustments (Line 19)
If you reported passive activity losses from rental properties, partnerships, or S corporations during 2015, calculate the AMT adjustment required on line 19. AMT rules apply different depreciation and basis limitations, which may reduce allowable losses. Form 8582 supports these calculations and determines differences between regular tax and AMT treatment.
Step 7: Calculate Alternative Minimum Taxable Income (Line 28)
Add the amount from line 1 to all applicable adjustments from lines 2 through 27 to calculate alternative minimum taxable income on line 28. This figure determines whether your income exceeds AMT phaseout levels and which AMT tax bracket applies. Accurate aggregation ensures correct exemption and rate application.
Step 8: Apply 2015 AMT Exemption and Tax Rates (Lines 29–33)
Enter the 2015 AMT exemption amount on line 29 and subtract it from the alternative minimum taxable income on line 28. For 2015, AMT uses two rate brackets based on filing status and income level. Calculate tentative minimum tax using the applicable 26 percent or 28 percent rate.
1. Apply the 26 percent rate to AMTI up to $185,400, or $92,700 if married filing separately.
2. Apply the 28 percent rate to AMTI above the applicable threshold.
3. Enter the resulting tentative minimum tax on line 33 using the 2015 rate table only.
Step 9: Complete Form 8801 for AMT Credits
If you paid AMT in a prior year, you may be eligible to claim AMT credits against your 2015 regular tax. Form 8801 calculates allowable credits carried forward, including limits based on current-year tax liability. These AMT credits differ from income credit items such as the child tax credit or premium tax credit.
- The 2015 AMT exemption amounts reflect inflation adjustments and vary by filing status,
- Medical expense adjustments use a 2.5 percent threshold under AMT rules, which
- The 2015 AMT tax brackets apply unique thresholds and must not be substituted with
- Form 8801 for 2015 applies a year-specific limitation formula when calculating allowable
- Interest from private activity bonds remains an AMT preference, even when derived from
- Full IRS transcript retrieval (Wage & Income + Account)
- Professional tax form review
- Preparation & filing support
- Tax relief options if you owe the IRS
Step 10: Determine Whether AMT Applies to Your 2015 Return
Compare the tentative minimum tax on line 33 with the regular income tax on line 34 of Form
6251. If the tentative minimum tax exceeds the regular tax, you owe AMT equal to the difference. Enter the AMT amount on Form 1040, line 45, for the 2015 tax year.
2015 Year-Specific Instructions and Changes including married filing jointly and married filing separately. differs from regular itemized deduction limits. later-year rate tables.
AMT credits. tax-exempt bonds or municipal bonds, and requires careful classification under 2015 guidance.
If you’re missing tax documents or want to ensure the numbers you enter match IRS records, we can help.
