The Alternative Minimum Tax (AMT) is a parallel tax system in the United States that operates alongside the regular income tax system. It was introduced in 1969 to ensure that high-income individuals and corporations pay a minimum level of tax, regardless of the deductions and credits they may be eligible for under the regular tax system. The AMT is designed to prevent taxpayers from using various tax loopholes and deductions to significantly reduce their tax liability.
One of the key differences between the AMT and the regular income tax system is the calculation method. Under the regular income tax system, taxpayers calculate their taxable income by subtracting allowable deductions and exemptions from their
gross income. This results in a lower taxable income and, consequently, a lower tax liability. However, the AMT uses a different set of rules and calculations to determine taxable income.
The AMT starts with the taxpayer's regular taxable income and adds back certain deductions and exemptions that are not allowed under the AMT rules. These include deductions for state and local taxes, certain miscellaneous itemized deductions, and personal exemptions. Additionally, the AMT disallows certain tax credits that can reduce regular tax liability, such as the
foreign tax credit and the credit for child and dependent care expenses.
Another significant difference between the AMT and the regular income tax system is the tax rates. The regular income tax system has progressive tax rates, meaning that higher-income individuals are subject to higher tax rates. In contrast, the AMT has two
flat tax rates: 26% for AMT taxable income up to a certain threshold, and 28% for AMT taxable income above that threshold. This means that some taxpayers may find themselves in a higher tax bracket under the AMT than under the regular income tax system.
Furthermore, the AMT has its own set of exemptions and phase-out thresholds. These exemptions are subtracted from AMT taxable income to determine the final AMT liability. However, as income increases, these exemptions gradually phase out, resulting in a higher AMT liability. The phase-out thresholds are not indexed for inflation, which means that more taxpayers are subject to the AMT over time.
Lastly, the AMT has different rules for capital gains and alternative minimum taxable income (AMTI). Under the regular income tax system, capital gains are taxed at different rates depending on the
holding period of the asset. However, under the AMT, capital gains are generally taxed at the same rates as ordinary income. Additionally, certain tax preferences and adjustments are made to calculate AMTI, which is used as the basis for determining the AMT liability.
In summary, the Alternative Minimum Tax (AMT) differs from the regular income tax system in several ways. It uses a different calculation method, disallows certain deductions and credits, has flat tax rates, has its own set of exemptions and phase-out thresholds, and treats capital gains differently. These differences ensure that high-income individuals and corporations pay a minimum level of tax and prevent them from significantly reducing their tax liability through deductions and credits.