Instructions for Form 6251- 2015 Tax Year Checklist
Form 6251 determines whether the alternative minimum tax applies for the 2014 tax year and
calculates any resulting tax liability under AMT rules. The alternative minimum tax recalculates taxable income by adjusting regular tax items, applying preference rules, subtracting an exemption, and comparing results against regular tax.
AMT calculations for 2014 rely on specific exemption amounts, phaseout thresholds, and line references unique to that year. This checklist follows the 2014 Form 6251 structure to help ensure adjustments, tentative minimum tax, and final comparisons are applied correctly.
Understanding the AMT Framework for 2014
The alternative minimum tax operates alongside the regular tax system and limits certain tax benefits, including itemized deductions, accelerated depreciation, and favorable treatment of incentive stock options. These adjustments produce an alternative minimum taxable income, which may trigger additional tax for high-income individuals.
After adjustments are applied, the AMT exemption amount reduces alternative minimum taxable income, subject to exemption phaseout thresholds. The tentative minimum tax is then compared with the regular tax liability to determine whether additional tax is owed.
Before Completing the Checklist: Prepare Key
Information
Accurate Form 6251 preparation depends on having the complete 2014 tax return and supporting schedules available. This includes Form 1040 or Form 1040NR, Schedule A if itemized deductions were claimed, and documentation supporting AMT-sensitive income sources.
Relevant records include state and local taxes, depreciation schedules, passive activity limitation workpapers, net operating loss calculations, and private activity bond interest statements. Having these inputs available prevents misclassification of AMT adjustments and line errors.
Ten-Step Checklist
Step 1: Confirm the filing requirement
Confirm whether Form 6251 must be filed by reviewing 2014 filing triggers such as incentive stock options, large itemized deductions, private activity bonds, or credit limitations. Even when no AMT is ultimately owed, Form 6251 may still be required under tax law.
Step 2: Identify the correct starting income
Determine the proper starting line for Form 6251 based on whether Schedule A was filed with
Form 1040. Use the applicable taxable income line specified in the 2014 instructions rather than adjusted gross income or other income measures.
Step 3: Address itemized deduction add-backs
Apply AMT adjustments to itemized deductions such as state and local taxes, miscellaneous deductions, and certain interest expenses when required. These add-backs are entered on specific Form 6251 lines and should follow the 2014 instructions precisely.
Step 4: Apply home mortgage interest adjustments
Evaluate whether home mortgage interest must be adjusted for AMT due to refinancing, home equity debt usage, or loan purpose restrictions. Complete the applicable worksheet and enter the adjustment on the correct Form 6251 line.
Step 5: Handle Net Operating Loss correctly
Enter the regular tax net operating loss deduction on the designated Form 6251 line and compute the alternative tax net operating loss deduction separately. The AMT limitation generally limits the deduction to 90% of alternative minimum taxable income.
Step 6: Refigure passive activity amounts
Recompute passive activity income or losses using AMT rules, accounting for depreciation and other preference differences. Enter only the difference between AMT and regular tax results on the specified Form 6251 line.
Step 7: Report private activity bond interest
Include specified private activity bond interest exempt from regular tax as an AMT preference using the designated Form 6251 line. Reduce the reported amount by any related deductions that would have applied if the interest were taxable.
Step 8: Adjust depreciation properly
Refigure depreciation for assets placed in service after 1986 only when AMT rules require a different method or recovery period. Enter the difference between regular tax depreciation and
AMT depreciation on the correct line.
Step 9: Apply the 2014 AMT exemption and phaseout
Apply the AMT exemption amount based on filing status and reduce it when the alternative minimum taxable income exceeds the 2014 exemption phaseout thresholds. These amounts are year-specific and should not be replaced with later inflation adjustments.
- Full IRS transcript retrieval (Wage & Income + Account)
- Professional tax form review
- Preparation & filing support
- Tax relief options if you owe the IRS
Step 10: Compute tentative minimum tax and final AMT
Apply the applicable AMT tax rates to the remaining taxable excess to compute the tentative minimum tax. Compare the tentative minimum tax to the regular tax liability and report any positive difference as AMT on the appropriate Form 1040 line.
Computing Tentative Minimum Tax and Regular Tax
Comparison
Tentative minimum tax is calculated after applying AMT tax rates and subtracting any allowable
AMT foreign tax credit where applicable. The result represents the minimum tax required under the alternative tax system for 2014.
Regular tax for comparison is computed using the components listed on Form 6251 rather than a single Form 1040 line. An accurate comparison ensures that AMT liability reflects the correct tax brackets and credit limitations.
Common AMT Triggers for the 2014 Tax Year
Certain transactions increase the likelihood of alternative minimum tax, including exercising incentive stock options without selling shares, claiming significant state and local taxes, or using accelerated depreciation. High-income earners, whether filing jointly or separately, should carefully review these areas.
Additional triggers include net operating loss deductions, private activity bonds, and differences between regular tax and AMT basis for capital gains. Identifying these factors early reduces errors during AMT adjustments.
ACA Items Remain Separate From Form 6251
Affordable Care Act provisions for 2014, including minimum essential coverage and shared responsibility payments, are handled outside Form 6251. These items are reported through
Form 1040 and Form 8965 rather than the AMT computation.
ACA coverage determinations do not trigger the alternative minimum tax and should not be included in AMT adjustments. Keeping these calculations separate prevents incorrect AMT liability.
Final Accuracy Review and Recordkeeping
Verify that all Form 6251 line references, exemption amounts, and tax rates reflect 2014 rules rather than later-law changes. Incorrect exemption phaseout thresholds or depreciation treatment can materially change the tentative minimum tax.
Maintain records for AMT basis differences, depreciation adjustments, and carry-forward items that may affect future tax years. When applicable, track the Credit for Prior Year Minimum Tax using Form 8801 and related documentation.
If you’re missing tax documents or want to ensure the numbers you enter match IRS records, we can help.
