The 2026 AMT amounts introduce significant changes that will affect high‑income taxpayers, especially those with large capital gains, substantial state and local tax deductions, or incentive stock option (ISO) activity. With new inflation‑adjusted exemption levels and updated phaseout thresholds, understanding how the Alternative Minimum Tax (AMT) works in 2026 is essential for accurate tax planning.
According to IRS inflation adjustments released in Rev. Proc. 2025‑32, the 2026 AMT exemption amounts increase to $90,100 for single filers and $140,200 for married couples filing jointly. These amounts determine how much income is shielded from the AMT calculation before phaseouts apply. Additional tax‑policy analysis confirms these same exemption levels for 2026.
What the 2026 AMT Amounts Include
1. AMT Exemption Amounts for 2026
For the 2026 tax year (returns filed in 2027), the AMT exemption amounts are:
- $90,100 for single filers
- $140,200 for married filing jointly
These figures represent inflation‑adjusted increases from prior years and are designed to prevent middle‑income taxpayers from being unintentionally pulled into the AMT system.
Some tax guides estimate slightly different numbers based on projected inflation, but the IRS‑published amounts above are the authoritative figures for 2026.
2. AMT Phaseout Thresholds
The AMT exemption begins to phase out once a taxpayer’s Alternative Minimum Taxable Income (AMTI) exceeds certain levels. Under the One Big Beautiful Bill Act (OBBBA), the phaseout thresholds reset in 2026 to:
- $500,000 for single filers
- $1,000,000 for married filing jointly
Once a taxpayer’s AMTI exceeds these thresholds, the exemption is reduced by 50 cents for every dollar above the limit—double the previous phaseout rate.
This accelerated phaseout means high‑income households may lose their AMT exemption more quickly than in prior years.
3. AMT Tax Rates for 2026
The AMT uses a two‑tier rate structure:
- 26% on AMTI up to a threshold
- 28% on AMTI above that threshold
For 2026, the 28% rate applies to taxable excess above $244,500.
These rates are generally lower than top regular income tax rates, but because AMT disallows many deductions, the effective tax burden can be higher.
Why the 2026 AMT Amounts Matter
The AMT is a parallel tax system designed to ensure high‑income taxpayers pay a minimum level of tax. It recalculates income using fewer deductions and adds back certain “preference items,” such as:
- State and local tax (SALT) deductions
- Incentive stock option (ISO) bargain elements
- Certain private‑activity bond interest
- Accelerated depreciation adjustments
Because the 2026 AMT amounts include higher exemptions but also faster phaseouts, more taxpayers with large one‑time income events may be exposed to AMT liability.
Who Is Most Likely to Be Affected in 2026?
Based on current tax‑policy analysis, the following groups are most at risk:
- ISO holders exercising large blocks of incentive stock options
- Taxpayers with high capital gains, especially from real estate or stock sales
- High‑income households in high‑tax states with large SALT deductions
- Investors holding private‑activity municipal bonds
- Real estate owners using accelerated depreciation
These triggers increase AMTI and can push taxpayers into AMT even when their regular tax liability appears sufficient.
How the 2026 AMT Amounts Compare to Prior Years
The Tax Cuts and Jobs Act (TCJA) dramatically increased AMT exemptions beginning in 2018, removing most middle‑income taxpayers from AMT exposure. However, many TCJA provisions expire after 2025 unless extended.
The 2026 AMT amounts reflect:
- Higher exemptions than pre‑TCJA levels
- Higher phaseout thresholds
- A steeper phaseout rate (50% instead of 25%)
This combination means the AMT will continue to target primarily high‑income taxpayers, but the faster phaseout may increase the number of households affected.
Planning Strategies for the 2026 AMT Amounts
Taxpayers can take several steps to manage potential AMT exposure:
1. Model AMTI Early
Use Form 6251 worksheets or tax‑planning software to project AMTI under different income scenarios. This is especially important for ISO exercises or large capital gains.
2. Time Income and Deductions
Because AMT disallows SALT deductions and certain timing strategies, shifting income or deductions between 2025 and 2026 may reduce exposure.
3. Manage ISO Exercises Carefully
ISO exercises are one of the most common AMT triggers. Taxpayers should consider:
- Splitting exercises across multiple years
- Exercising early in the year to monitor stock price changes
- Using disqualifying dispositions strategically
4. Track the Minimum Tax Credit
If AMT is paid in 2026, taxpayers may recover some or all of it in future years using Form 8801.
Key Takeaways
- The 2026 AMT amounts include exemptions of $90,100 (single) and $140,200 (married filing jointly).
- Phaseouts begin at $500,000 and $1,000,000, with a 50% phaseout rate.
- The 28% AMT rate applies above $244,500 of taxable excess.
- High‑income taxpayers with ISOs, large capital gains, or high SALT deductions are most likely to be affected.
- Early planning can significantly reduce AMT exposure.
This article provides information only and should not be construed as advice. It is provided without warranty of any kind.