alternative minimum taxable income

The Alternative Minimum Tax – A Guide for High-Income Taxpayers

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Review by 
Hoang Tran

Full Bio

Ms. Frances Dang is a visionary CPA, Partner at XOATAX, and a Tax Expert for many high-net-worth clients and corporations. She specializes in both minimizing tax liabilities and driving sustainable growth. Over 7 years of dedicated service, Ms. Frances has provided personalized planning for high-net-worth clients including business owners, investors, and entrepreneurs spanning manufacturing, e-commerce, biotechnology, fintech, services, and non-profit sectors. 
Kevin Zhang renowned CPA and Tax Expert with over 15 years working in tax planning and financial optimization for individuals and large businesses. He excels in analytical abilities and innovative problem-solving, identifying tax minimization opportunities, and providing strategic recommendations to leadership teams.
Hoang Tran  is an accomplished CPA and financial advisor with over 8 years of experience. He specializes in providing tailored financial solutions, tax optimization, and strategic guidance to individuals and businesses. With a client-centric philosophy and a commitment to continuous learning, Hoang has earned a reputation as a trusted expert in personalized financial strategy. His expertise has helped businesses across diverse industries, including manufacturing, import & export, and wholesale & distribution, achieve their financial success.

The alternative minimum tax (AMT) is a tax system designed to ensure that high-income taxpayers pay a fair share of income tax. It operates alongside the regular tax system, imposing additional taxes on certain individuals and corporations. In this comprehensive guide, we will delve into the intricacies of the AMT, its calculation, exemptions, rates, and how it affects taxpayers.

Understanding the Alternative Minimum Tax

Alternative Minimum Tax is a parallel tax system that restricts some of the tax breaks available under the regular tax rules. Its primary purpose is to prevent high-income individuals (Form 6251) and corporations (Form 4626) from excessively reducing their tax liabilities through various deductions and credits. The AMT aims to establish a minimum level of income tax that these taxpayers must pay, regardless of their deductions and exemptions.

Calculation of the Alternative Minimum Tax

Calculating the AMT is a multi-step process. It starts with determining your alternative minimum taxable income (AMTI). To arrive at your AMTI:

  1. Add back standard deduction or certain itemized deductions (state and local tax, personal exemptions, mortgage interest, etc.).
  2. Add back or deduct certain items depending on your tax situation such as investment interest, net operating losses, tax refund, etc (for full list see Part I) After this, you get AMTI.
  3. Once you have AMTI, you subtract it from the AMT exemption (fixed amount based on your filing status and the AMTI amount) to get to the minimum tax base.
  4. Then, depending on the minimum tax base amount, multiply it by 26% if below a certain threshold (206,100 for all other statuses and 103,050 if Married Filing Separately in 2022) or by 28% if above the threshold. After that subtract the result from alternative minimum tax foreign tax credit (if applicable) to get to the Tentative Minimum Tax (TMT).
  5. Then, deduct regular income tax on taxable income from the tentative AMT to get to the AMT. In other words, AMT = TMT – Regular Income Tax on taxable income.


corporate alternative minimum tax

Comparing AMT with Regular Tax Liability

After calculating your tentative minimum tax (TMT) using the AMT rules, you compare it with your regular tax liability – the amount of tax you would owe under the standard tax system. If your TMT is higher than your regular tax liability, you must pay the difference as AMT, making up the full TMT. On the other hand, if your TMT is lower than or equal to your regular tax liability, you are not required to pay any additional AMT.

Who Is Affected by the Alternative Minimum Tax?

The AMT affects primarily high-income taxpayers, particularly those with substantial deductions and exemptions. It may also impact individuals with a large number of tax preferences or those who exercise incentive stock options. Taxpayers with relatively simple tax situations and lower incomes are less likely to be subject to the AMT.

Individual Taxpayers subject to the AMT are required to complete Form 6251 to determine their AMT liability accurately. This form guides taxpayers through the process of calculating their AMT and helps them understand which deductions and exclusions need to be added back to their income.

>> You may also be interested in Tax-Saving Strategies for High-Income Earners

Alternative Minimum Tax Exemptions

The AMT exemption amounts are adjusted annually for inflation. These exemptions phase out gradually as income increases.

Single Married, filing jointly Married, filing separately
Exemption amount $75,900 $118,100 $59,050
Income at which exemption begins to phase out $539,900 $1,079,800 $539,900
Exemption amount $81,300 $126,500 $63,250
Income at which exemption begins to phase out $578,150 $1,156,300 $578,150

Investors and the AMT

Investors should be aware of how the AMT can affect their tax liability. Long-term capital gains and certain dividends can push your income into the AMT system. These investments, while subject to preferential tax rates under the regular tax system, may be treated differently under the AMT rules.

Deductions Impacted by the AMT

Under the AMT, various deductions are limited or eliminated, including state and local taxes, personal exemptions, and certain itemized deductions. Business expenses and other deductions may also be curtailed, resulting in a higher AMT liability.

alternative minimum tax credit


The alternative minimum tax (AMT) is a complex tax system aimed at ensuring that high-income taxpayers pay a minimum amount of income tax. Calculating the AMT involves adding back standard or certain standard itemized deductions, adding or deducting certain items (depending on your tax situation) applying specific tax rates, and comparing the resulting tax liability with the regular tax liability. While the AMT affects a specific subset of taxpayers, its impact can be significant for those subject to its rules.

As tax laws and regulations evolve, it’s crucial to stay informed and seek professional advice to navigate the intricacies of the AMT and optimize your tax strategy. For more in-depth information and personalized guidance, consult with our expert team or visit the official IRS website for the latest updates on the AMT.

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