In contrast to the regular income tax, which permits different deductions and credits , the Alternative Minimum Tax (AMT) is a flat tax of 26% or 28% for the larger income base, which can be higher than your normal tax rate. It’s true that ISOs could have substantial impact on taxpayers under the AMT however, there are other reasons to be aware of in addition. With exemption levels for AMT set to decline in 2026, understanding these triggers can aid in reducing the AMT liabilities.
What are the triggers for AMT?
1. High Income
If your household earnings exceed the thresholds for phaseout of $1,252,700 for married couples, and $626,350 for other households, you may be liable to AMT, especially if you make a lot of itemized deductions. Beginning in 2026, these thresholds will be reduced down to $1 million for joint filers, and $500,000 for other filers. If your AMT earnings exceed those thresholds, exemption will expire twice as quickly (e.g. 50 cents per dollar as opposed to the 25 cents currently per dollar).
2. Important itemized deductions
The claim of itemized deductions for example, local and state taxes as well as the interest charged on mortgages that are used for other purposes than buying or building your home increases the chances of triggering AMT. In addition, the AMT calculations require that dental and medical expenses to be greater than 10% of your AGI to be deductible (versus 7.5% for the non AMT calculation).
3. Exercising Non-Qualified Stock Options (NQSOs)
Similar to incentive stock options (ISOs), the exercise of Non-qualified Stock Options (NQSOs) can substantially increase the amount of tax deductible income. What’s the difference between exercise prices and fair market value of the stock will be classified as normal income in the regular tax system. This extra income can cause you to be pushed over the threshold for phaseout of AMT.
For instance, a taxpayer who earns $200,000 exercises and sells vested NQSOs and earns $400,000 in additional tax-deductible income. The combined $600,000 of income is close to the AMT threshold for phase-out of $626,350. At this point the effect of AMT could be real, potentially reducing the benefits of deductions while increasing the total obligation.
Engaging in NQSOs can dramatically alter tax income in one year. Proper planning for example, the spread of option exercises across multiple tax years, or combining exercises with charitable contributions or co-ordinating using other strategies for tax can help reduce the chance of accidentally activating the AMT.
AMT can significantly impact your tax liability if you’re not prepared. Explore our Business Taxes & Compliance: The Complete 2026 Guide for Texas Business Owners for deeper tax planning strategies.
4. Income from investments
Investment income like significant capital gains, or earnings from tax-free municipal bonds for private activities could boost your earnings above the exemption phaseout threshold.
5. Standard deduction
AMT rules do not allow for the standard deduction even when you include it on your regular return.
Strategies to deal with the AMT
The timing of deductions and income
The ability to defer income into a year with less AMT liability, and then accelerating deductions to years with a higher AMT liability could reduce AMT liability. For example, a high earner anticipating a substantial bonus, stock sale and large deductions such as charitable donations or property taxes could defer income until the next year, and then accelerate deductions to this year. With thresholds for exemptions set to fall and the tax rate getting steeper by 2026, the timing will be important more than ever before.
Maximize tax credits
Make use of tax credits, like the foreign tax credit, or the tax credit for dependent and child care to lessen the tax burden you face under the AMT.
Diversify your investments
If you spread your investments across different categories of assets, while also trying to avoid significant gain on capital, you can lessen the impact of AMT-triggered investments and lower your tax burden overall. Certain investments, such as municipal bonds that are private activity can trigger AMT. Tax-efficient investments, like municipal bonds (not specifically classified as private-activity bonds) are exempted from federal tax, and they do not create AMT.
Monitor exemptions as well as phaseouts
For the tax year 2025, AMT deductions and exemptions start to fade out when your income is above $626,350 for solo filers, and $1252,700 for married couples who file jointly. When you reach those thresholds it might be beneficial to take proactive steps to reduce your tax burden by increasing the amount of tax-deductible expenses like the charitable contribution or property tax or by increasing the amount of contributions towards retirement savings. There will be a more steep phase-out with thresholds set to decrease in 2026 and reach $500,000 for filers who are single, and $1 million for couples who are married.
When you recognize possible AMT causes, you could be able to anticipate and alter your financial choices to limit AMT exposure. A qualified tax professional and remaining up-to-date on changes to tax laws can also aid taxpayers in navigating the complexities that are associated with AMT and maximize their tax planning strategies overall.
Not sure if AMT applies to your situation? Dive into our 2026 Texas Business Tax Guide for clear insights on tax rules, compliance, and planning.
How Parr & Ibarra Can Help
Here at Parr & Ibarra CPA in Keller, TX, we understand what taxation under the Alternative Minimum Tax can easily take even the most careful taxpayers by surprise. With exemption levels expected to be tightened in 2026, a strategic approach is vital to keep ahead. Our team can help clients anticipate AMT triggers, maximize deductions, and plan income efficiently to limit the risk of being exposed. Through an active, data-driven approach and ensuring that your tax strategy is in line with the latest regulations and the upcoming adjustments. By having our team as your trusted advisor, you will be able to manage the complexities of AMT with confidence and ensure that your financial plan runs smoothly for you.
