The AMT is difficult to apply and the exact computation is very complex. If you owed AMT last year and no unusual deduction or windfall had come your way that year, you're sufficiently at risk this year to apply a detailed set of computations to any AMT assessment. Ballpark estimates just won't work.

If you did not owe AMT last year, you still may be at risk. The IRS estimates that half million more individuals will be subject to the AMT in 2006 because of rising deductions and exemptions. If Congress doesn't extend the same AMT exclusion amount given in 2005, an estimated 3 million more taxpayers will pay AMT.

For a system that was intended originally to target only the very rich, the AMT now hits many middle to upper-middle class taxpayers as well. Obviously something has to be done, and will be, eventually, through proposed tax reform measures. In the meantime, expect AMT to be around for at least another year.

Basic calculations. Whether you will be liable for the AMT depends on your combination of income, adjustments and preferences. After all the computations, if your AMT liability exceeds your income tax liability, you will be liable for the AMT. Here are the basic steps to take to determine in evaluating whether you will owe the AMT:

 

• Step #1: Calculate your regular taxable income. If your regular tax were to be determined by reference to an amount other than taxable income, that amount would need to be determined and used in the next steps.
   
• Step #2: Calculate your alternative minimum taxable income (AMTI) by increasing or reducing your regular taxable income (or other relevant amount) by applying the AMT adjustments or preferences. These include business depreciation adjustments and preferences, loss, timing and personal itemized deductions adjustments, and tax-exempt or excluded income preferences. This is the step with potentially many sub-computations in determining increases and reductions in tax liability.
   
• Step #3:  If your AMTI exceeds the applicable AMT exemption amount, pay AMT on the excess.

While no single factor will automatically trigger the AMT, the cumulative result of several targeted tax benefits considered in Step #2, above, can be fatal. Common items that can cause an "ordinary" taxpayer to be subject to AMT are:

• All personal exemptions (especially of concern to large families);
• Itemized deductions for state and local income taxes and real estate taxes;
• Itemized deductions on home equity loan interest (except on loans used for improvements);
• Miscellaneous Itemized Deductions;
• Accelerated depreciation;
• Income from incentive stock options; and
• Changes in some passive activity loss deductions.