Alternative minimum tax—Individuals

The tax law gives special treatment to certain kinds of income and allows special deductions for certain kinds of expenses. The AMT was designed to increase the tax bill of taxpayers who take undue advantage of these tax benefits to avoid significant tax liability.

The basic mechanism by which the AMT accomplishes its objective is by treating certain items less favorably than they are for purposes of the regular tax. These items are referred to as “tax preferences” or “adjustments.” Adjustments differ from preferences only in that adjustments involve a substitution of a special AMT treatment of an item for the regular tax treatment (for example, no deduction is allowed for personal and dependency exemptions), while a preference generally involves the addition of the difference between the special AMT treatment and the regular tax treatment (for example, depletion is limited to the adjusted basis of the property).

The AMT starts with your regular taxable income and, in general, makes you “give back” the tax preferences and adjustments until you arrive at “alternative minimum taxable income” (AMTI). Then, after subtracting an exemption amount (discussed below), a tax rate of 26% applies to the first $175,000 of this income and 28% to amounts above $175,000. (For married taxpayers who file separately, the rate changes at $87,500.) However, the AMT rates for long-term capital gains, as well as dividends that qualify to be taxed at long-term capital gain rates, are the same favorable rates that apply for regular tax purposes.

If the tax liability under the AMT system is higher than your regular tax liability, you must pay the higher amount. If the AMT liability comes out below your regular liability, then the AMT has no tax impact on you and you simply pay the regular tax.

You may be subjected to the AMT even if you have no tax preferences. For example, if you have a large family, elimination of the personal and dependency exemptions to which you are entitled for regular tax purposes may cause you to be subject to the AMT.

You compute the AMT on a special IRS form (Form 6251) that must be attached to your Form 1040.

Adjustments and preferences. The following are some of the more common adjustments or preferences required to arrive at AMTI:

(1) Tax-exempt interest. Tax-exempt interest from certain private activity bonds (other than qualifying bonds issued in 2009 or 2010) isn’t exempt for AMT purposes. Thus, although you exclude this interest from your regular taxable income, you must include it in AMTI.

(2) Interest deduction. For AMT purposes you can only deduct mortgage or home equity loan interest on funds you borrowed to buy, build, or substantially improve your home or a second residence (or on the refinancing of that debt). So, if you claimed a regular tax deduction for interest on a home equity loan that you didn’t devote to the home, you would have to add it back in determining AMTI. Also, an adjustment may have to be made to your investment interest deduction in some cases for AMT purposes.

(3) State and local tax deduction. For AMT purposes, you get no deduction for state and local income taxes, or real estate or other property taxes, although a deduction is allowed for regular tax purposes. So you will have to add any income or property taxes you deducted for regular tax purposes back to taxable income in determining AMTI. But you can deduct motor vehicle taxes (for new vehicles purchased after Feb. 16, 2009 and before 2010).

(4) Medical expenses. If you are deducting any medical expense for regular tax purposes, some of the deduction will be lost for AMT purposes. For regular tax purposes, medical expenses are deductible to the extent they exceed 7.5% of adjusted gross income (AGI). For AMT purposes, however, they are only deductible to the extent they exceed 10% of AGI. Thus, you would compute your reduced deduction amount and add the difference back to taxable income in determining AMTI. (For example, if your “regular” medical deduction was $8,000 and your AMT medical deduction is $6,000, you would add back $2,000 to taxable income.)

(5) Miscellaneous itemized deductions. If you are entitled to a regular tax deduction for any miscellaneous itemized expenses (these are deductions that are limited, even for regular tax purposes, to the excess over 2% of your AGI), you would not get any deduction for them for AMT purposes, regardless of what they are comprised of.

(6) Personal and dependency exemptions. These aren’t allowed. You must add them back to your regular taxable income in determining AMTI.

(7) Standard deduction. If you take the standard deduction instead of itemizing, you must add back the deduction (other than the disaster loss component or the motor vehicle tax component (for new vehicles purchased after Feb. 16, 2009 and before 2010)) to determine AMTI.

(8) Incentive stock options (ISOs). The favorable tax treatment allowed for ISOs isn’t allowed for AMT purposes. This means that although you don’t pay any regular tax when you exercise an ISO, you may have to pay AMT on the value of the stock you receive (minus what you paid for it) in the year you exercise the ISO unless you sell the stock that year. This is true even if the stock price declines significantly after you exercise the ISO.

(9) Depreciation deductions. For certain depreciable property, the depreciation schedules are slower for AMT purposes than for regular tax purposes. Therefore, some adjustments may have to be made in your depreciation deductions, and in the gain or loss on the sale of this property.

(10) Depletion. For AMT purposes, depletion is allowed only to the extent of your adjusted basis for the property.

(11) Other preferences. Other types of preferences may apply depending on your particular tax situation. Please call if you would like me to review your overall tax situation from the AMT perspective.

Exemption amounts. As noted above, in computing your AMT, after you arrive at AMTI, you subtract an exemption amount. For single taxpayers, the exemption amount for 2009 was $46,700. However, you must reduce the exemption by 25% of the amount by which AMTI exceeds $112,500. For married taxpayers filing jointly and surviving spouses, the 2009 exemption amount was $70,950, and the 25% reduction started when AMTI exceeds $150,000.  For 2010, unless Congress passes legislation, the exemption amount drops to $33,750 for single filers and $45,000 for joint filers subjecting many more taxpayers to the AMT tax.

A nonrecurring spike of income—for example, the recognition of a significant amount of capital gains in a year—might trigger the phaseout (under the 25% reduction rules discussed above) of your AMT exemption, which could result in an AMT liability. This could happen even though, as mentioned above, the AMT rates on long-term capital gains and qualified dividend income are the same favorable rates that apply for regular tax purposes. The inclusion of long-term capital gains in your taxable income, as well as in your AMTI, might also affect your entitlement to various deductions and credits, and the amounts of AMT preferences and adjustments, that vary or phase out depending on the amount of your income.

AMT credit. Once you are subject to the AMT, you may be entitled to a credit (the “minimum tax credit” or “AMT credit”) which can reduce your tax liability in the future. You generally can’t use the minimum tax credit to get a tax refund. However, a partial refund is available for credits that haven’t been used after three tax years.


About Don James, CPA/PFS, CFP
Don is the Tax & Financial Planning partner with Kiplinger & Co., CPAs headquartered in sunny Cleveland, Ohio since 1982. He partners with business owners and families and specializes in goal achievement solutions, tax minimization strategies and serves in the role of gatekeeper of sound financial advice.

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