Form 6251

What Is Form 6251?

Form 6251 is an Internal Revenue Service (IRS) tax form used to determine the amount of alternative minimum tax (AMT) that a taxpayer may owe. Some taxpayers with higher incomes can claim certain deductions that allow them to reduce their regular tax obligation. The AMT sets an upper limit on how much that deduction can be to ensure the wealthy pay their fair share of taxes. If you are among those to whom it applies, you'll pay the AMT instead of standard income taxes.


Who Can File Form 6251?

Each taxpayer must evaluate whether or not they must pay AMT each year. Depending on your income level, you may not need to. The AMT is a tax system parallel to the regular income tax. It was enacted in 1969 and was originally designed to identify and collect taxes owed by a limited number of wealthy individuals and families who were otherwise avoiding income taxes. It does this by limiting the number of itemized deductions that can be claimed by a taxpayer. Deductions for state and local taxes are not allowed, for example. In addition, taxpayers impacted by the AMT cannot take the standard deduction.

How to File Form 6251

Form 1040: U.S. Individual Tax Return includes a worksheet that allows a taxpayer to determine whether AMT is owed, but it only provides basic computations. Form 6251 is more detailed and will give a more accurate answer, and simply completing it does not mean that it has to be filed. Alternatively, you can use tax software or enlist a tax pro. Only if there is AMT owed will Form 6251 have to be attached to Form 1040. The AMT requires affected taxpayers to calculate their tax bill under the ordinary income tax system and again under the AMT, paying the higher of the two amounts. After calculating your AMT, you can claim an exemption based on your filing status. The AMT exemption is much higher than the standard exemption but phases out when you reach a certain income level. In 2019, the AMT exemption for individual filers is $71,700 and for married joint filers, $111,700. In 2020, it will increase to $72,900 and $113,400, respectively. The exemption begins to phase out when income reaches $510,300 for individual filers and $1,020,600 for married joint filers.

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