One of the big problems with the AMT, there’s no good answer to this common question. You can owe AMT liability due to any number of reason/s. Could be just one thing, could be a lot of little things. Some things that can contribute to an AMT liability are mundane items that appear on many tax returns. (See this list Top 10 Things that Cause AMT Liability.)

          If you use computer software to prepare your tax return, the program should (I would hope) be able to do the AMT calculations for you. If you’re preparing your return by hand, the only way to know for sure is to fill out IRS Form 6251 – a very laborious process, on that I charge almost $80.00 for, and that price is adjusted (usually up) almost every time.

         The best way to understand the alternative minimum tax liability is to see how it’s calculated. So, here’s what you do.

         First, you figure the amount of tax you would owe under the different rules. What’s different about these rules? Roughly speaking, there are three things:

  1. Various tax benefits that are available under the regular tax are reduced or eliminated.
  2. You get a special deduction called the AMT exemption, which is designed to prevent the AMT from applying to taxpayers with modest income. This deduction phases out when your income reaches higher levels, a fact that causes significant problems with the alternative minimum tax.
  3. You calculate the tax using AMT rates, which start at 26% and move to 28% at higher income levels. By comparison, the regular tax rates start at 10% and then move through a series of steps to a high of 35%.

          The result of this calculation is the amount of income tax you would owe under this “alternative” system of tax.

          Okay, got that number? Now then, compare this “tax” with your regular tax. If the regular tax is higher, you don’t owe any AMT. However, if the regular tax is lower, the difference between the two taxes is the amount of AMT you have to pay.

         You should definitely run the numbers if your gross income is above $75,000 and you have write-offs for personal exemptions, taxes and home-equity loan interest. if your income is over $150,000, run the numbers just because.

        Running the numbers means filling out Form 6251. In effect, you are simply adding back some tax deductions and income exclusions to your regular taxable income to arrive at your new alternative minimum taxable income (AMTI).

“Here is where the middle class gets screwed by the goat. If you are planning on doing all this on your own please call a tax pro for some guidance and a better understanding.”

         The AMT form has quite a few other pluses and minuses, but you can probably ignore them unless you own a business, rental properties or interests in partnerships or S corporations. If you do, you may need a tax pro to prepare at least the Form 6251 part of your return for you.

         Finally, you get to deduct the AMT exemption however, this exemption is reduced by 25 cents for each dollar of AMT taxable income above $150,000 for couples ($112,500 for singles and $75,000 for married filing separate status), and it’s not adjusted for inflation, which is one of the reasons why more people owe the AMT every year.

         After the exemption (if any) has been deducted, the result is subject to AMT rates. Again, the AMT brackets are not adjusted for inflation, which causes much greater exposure to the tax as the years go by. If the AMT exceeds your regular tax, you have to pay the greater amount. Basically, the AMT is just more tax, above and beyond your regular tax. Technically, the AMT is just the liability over and above the regular tax, and this figure is entered on page 2 of Form 1040.

Other notes:

         To calculate and report your AMT liability you need to fill out Form 6251, Alternative Minimum Tax – Individuals. If you use this form by all means please read the instructions.

         You’re required to take your AMT liability into account in determining how much estimated tax you pay. For information about estimated tax payments, see this Guide to Estimated Tax.

© 2009, Ghost Writer. All rights reserved.

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