Does Your State Have an Individual Alternative Minimum Tax?

This week’s map shows the five states that have an Alternative Minimum TaxA tax is a mandatory payment or charge collected by local, state, and national governments from individuals or businesses to cover the costs of general government services, goods, and activities. (AMT) in their individual income taxAn individual income tax (or personal income tax) is levied on the wages, salaries, investments, or other forms of income an individual or household earns. The U.S. imposes a progressive income tax where rates increase with income. The Federal Income Tax was established in 1913 with the ratification of the 16th Amendment. Though barely 100 years old, individual income taxes are the largest source of tax revenue in the U.S. codes: California, Colorado, Connecticut, Iowa, and Minnesota. Under an individual AMT, many taxpayers are required to calculate their income tax liability under two different systems and pay the higher amount.

The federal AMT was created in 1963, after Congress discovered that 155 high-income taxpayers were eligible to claim so many deductions that they ended up with no federal income tax liability at all. The federal AMT disallows the standard deductionThe standard deduction reduces a taxpayer’s taxable income by a set amount determined by the government. It was nearly doubled for all classes of filers by the 2017 Tax Cuts and Jobs Act (TCJA) as an incentive for taxpayers not to itemize deductions when filing their federal income taxes. and adds back certain itemized deductionItemized deductions allow individuals to subtract designated expenses from their taxable income and can be claimed in lieu of the standard deduction. Itemized deductions include those for state and local taxes, charitable contributions, and mortgage interest. An estimated 13.7 percent of filers itemized in 2019, most being high-income taxpayers. s—including the state and local tax (SALT) deduction—thus recapturing income from taxpayers who would otherwise be eligible to claim those expenditures.

While the federal AMT was originally intended to be a narrow fix to a narrow problem, it was not indexed for inflationInflation is when the general price of goods and services increases across the economy, reducing the purchasing power of a currency and the value of certain assets. The same paycheck covers less goods, services, and bills. It is sometimes referred to as a “hidden tax,” as it leaves taxpayers less well-off due to higher costs and “bracket creep,” while increasing the government’s spending power. . As a result, it wasn’t long before many middle-income taxpayers found themselves having to calculate and pay an AMT. Several states followed suit by implementing their own AMTs. This meant some taxpayers had to calculate their tax liability four times: twice under the federal code and twice under their state’s code.

The Tax Cuts and Jobs Act increased the federal AMT’s exemption amounts and phaseout thresholds through 2025, meaning fewer taxpayers will be required to calculate and pay the federal AMT in forthcoming years. In states that conform to the federal provision or use it as the basis for their own calculation, fewer filers will be subject to the AMT—for now. (To the extent that states use old thresholds, filers will have to go through the process of calculating a state AMT even if no longer subject to a federal AMT.) Unless Congress chooses to extend it, the higher exemption amounts will sunset after 2025, a change that will also impact state tax codes.

The original goal of AMTs—to prevent deductions from eliminating income tax liability altogether—can be accomplished best by simplifying the existing tax structure, not by instating an alternative tax which adds complexity and lacks transparency and neutrality.

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