The venerable Alternative Minimum Tax, or AMT, was conceived to extract income taxes from those in the highest tax brackets, who evaded standard income taxes through a number of investing loopholes. But because the AMT was originally not indexed for inflation, eligibility incomes have crept downward to hit taxpayers in much lower income brackets. Although the American Taxpayer Relief Act that took effect on January 2, 2013 rectified this problem, a number of mid-range taxpayers may still take a hit on 2012 income.

The AMT has been around for a long while. Created in 1960, it originally targeted less than 200 individuals with incomes of over $200,000. These people, rich by the standards of the times, were able to avoid paying any federal taxes through a variety of loopholes involving investment income and other kinds of business assets.

But at its inception, the AMT was never adjusted to allow for inflation and the changing value of the dollar. Without that annual adjustment, even a yearly increase of a few percentage points brings more and more taxpayers closer to the line that separates those higher income brackets from most middle and lower class filers.

As of this year, with the enactment of the American Taxpayer Relief Act, the AMT was finally permanently indexed for inflation, providing some relief to taxpayers for years to come. But for those filing taxes for 2012 may still have to deal with the AMT in some form, even of only to establish that it doesn’t apply.

Under current conditions, you could owe AMT if your taxable income for 2012 was more than $78,750 for a married couple filing jointly, or for surviving spouses, $50,600 for singles, or just $39, 375 for a married person filing separately. That’s a long way from the original income line for which the tax was intended.

The AMT has its own set of tax rates – 26 and 28 percent – and requires separate calculations and paperwork to establish whether the AMT applies. Under the AMT, a number of tax breaks are disallowed, many of them obviously related to wealthy individuals: incentive stock options, tax exempt interests on private activity bonds, and depreciation on certain kinds of leased property.

Most individuals in the tax brackets on the margins of the AMT dividing line don’t have to worry about those kinds of deductions. But some common tax breaks claimed by average taxpayers may also be disallowed or reduced under the AMT, such as state or local taxes and a number of miscellaneous itemized deductions. Medical deductions are still allowed, but at reduced rates’

But some home and property related deductions take the greatest hit under the AMT. Mortgage interest is still allowed, but home equity loan interest is eligible only if used toward home improvements.

Property taxes can’t be deducted at all under the AMT. Once these disallowed breaks are added back, it’s likely that most taxpayers falling under AMT guidelines rather than the standard tax schedule will end up paying a higher tax bill.

Although the American Taxpayer Relief Act restores some measure of equity to the AMT for 2013 and beyond, its regulations in their current form can affect investors following Jason Hartman’s recommendations on building wealth from income property, since income from property investments boost them into AMT-vulnerable tax brackets. To clarify eligibility and get the maximum deductions allowed, it”s wise to consult with qualified tax professionals to sort it all out. (Top image: Flickr/401(K) 2013)

The American Monetary Association Team