Form 6251 (2012): Alternative Minimum Tax—Individuals
Purpose and Overview
Form 6251 computes Alternative Minimum Tax for individuals by recalculating taxable income with specific adjustments and preferences, then applying 2012 AMT rates of 26 percent or 28 percent and exemption amounts. The 2012 tax year introduced revised Part III capital gains rate calculations reflecting maximum long-term capital gains rates of 15 percent and 25 percent that differ from regular tax computation, requiring filers with qualifying capital gains or dividends to complete enhanced worksheets cross-referencing Schedule D and the Qualified Dividends and Capital Gain Tax Worksheet.
Initial Income Entry and Medical Adjustments
You enter adjusted gross income from Form 1040, line 38, on Form 6251, line 1 if you do not file Schedule A, or you enter the amount from Form 1040, line 41 if you file Schedule A. This 2012 baseline differs from prior years by explicitly excluding any standard deduction recalculation, as AMT requires the use of actual amounts reported on the primary return without modification for AMT purposes at this initial step.
You calculate the medical and dental adjustment by entering the lesser of Schedule A line 4 or 2.5 percent of Form 1040 line 38 on Form 6251, line 2. For 2012, this 2.5 percent threshold requires comparing actual medical expenses deducted against the statutory floor for AMT adjustment purposes. You retrieve total state, local, and foreign income taxes from Schedule A line 9 for entry on Form 6251, line 3. In 2012, this line captures all taxes claimed as itemized deductions and feeds directly into AMT add-backs.
Mortgage Interest and Miscellaneous Deductions
- You complete the home mortgage interest worksheet in the 2012 Form 6251 instructions to determine the line 4 adjustment.
- The 2012 instructions specify that only interest on debt incurred to acquire or substantially improve a principal residence qualifies for AMT purposes.
- Refinanced debt exceeding the original loan principal generates an adjustment that you must calculate using the worksheet provided.
You obtain miscellaneous deductions from Schedule A line 27 for entry on Form 6251, line 5.
The 2012 instructions specify that this line includes employee business expenses, investment fees, and tax preparation fees, subject to the 2 percent floor.
All miscellaneous deductions are added back as AMT adjustments, with no exceptions for 2012.
Tax Refund Adjustments
You report a tax refund from Form 1040 line 10 or line 21 as a negative adjustment on line 7 only if the refund is attributable to prior-year AMT paid. The 2012 instructions require documentation linking the refund to AMT liability, not general refunds.
Exemption Amounts and Rate Application
You determine the 2012 AMT exemption amount based on filing status:
- The exemption amount is $78,750 for married filing jointly or a qualifying widow(er).
- The exemption amount is $50,600 for single filers and heads of household.
- The exemption amount is $39,375 for married filing separately.
These specific 2012 thresholds must be entered on line 29 before subtracting them from the alternative minimum taxable income on line 30.
You apply the 2012 bifurcated AMT rate on line 31 by multiplying line 30 by 26 percent if line 30 does not exceed $175,000, or by multiplying line 30 by 28 percent and subtracting $3,500 if line 30 exceeds $175,000. For married filing separately, you use $87,500 as the threshold and subtract $1,750 instead of $3,500. This rate structure and threshold define the core AMT calculation for 2012.
Capital Gains Computation Requirements
Part III Completion Criteria
You complete Part III if you reported capital gain distributions on Form 1040 line 13, qualified dividends on line 9b, or gains on Schedule D lines 15 through 16 as refigured for AMT. The 2012 instructions require careful cross-referencing between the Qualified Dividends and Capital Gain Tax Worksheet and Schedule D Tax Worksheet to avoid double-counting.
Capital Gains Rate Thresholds
You enter the 2012 long-term capital gain rate thresholds on Part III line 43:
- The threshold amount is $70,700 for married filing jointly or a qualifying widow(er).
- The threshold amount is $35,350 for single filers and married filing separately.
- The threshold amount is $47,350 for head of household filers.
These 2012-specific thresholds define where the 15 percent and 25 percent rates transition and must match your filing status exactly.
Rate Application and Final Calculations
Standard Rate Application
You calculate the 15 percent rate application on line 49 by multiplying line 48 by 15 percent after completing all preceding Part III calculations. You calculate the 25 percent rate application on line 51 by multiplying line 50 by 25 percent if line 38 contains an amount related to unrecaptured section 1250 gain. You add lines 42, 49, and 51 together on line 52 to determine your total tax using maximum capital gains rates.
Alternative Calculation and Comparison
- You calculate an alternative amount on line 53 by multiplying line 36 by 26 percent if line 36 is $175,000 or less.
- You multiply line 36 by 28 percent and subtract $3,500 if line 36 exceeds $175,000.
- For married filing separately, you use $87,500 as the threshold and subtract $1,750 instead of $3,500.
- You enter the smaller of line 52 or line 53 on line 54 and carry this amount to Form 6251, line 31.
This comparison ensures you pay the lower amount when capital gains rates produce a more favorable result than standard AMT rates.
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This checklist is for educational purposes only and does not constitute tax or legal advice. Always review official IRS instructions and consult a qualified professional for guidance.
