Alternative minimum tax

A separate tax calculation that applies to some high income individuals.  In that calculation, many of the deductions allowed in the regular tax calculation are reversed.  A higher deduction is applied ($70,300 for single taxpayers and $109,400 for taxpayers who are married filing jointly for tax year 2018) to derive alternative minimum taxable income.  Tax rates of 26% and 28% (for tax year 2018) are multiplied by alternative minimum taxable income to derive the alternative minimum tax.  Taxpayers pay the higher of their regular and alternative minimum tax.