Understanding the Alternative Minimum Tax (AMT): What You Need to Know for 2026 – the Reese CPA Firm.
The Alternative Minimum Tax (AMT) is a parallel tax system designed to ensure that high-income taxpayers pay a minimum amount of federal income tax, even if they benefit from significant deductions, credits, or preferences under the regular tax system. As we approach the 2026 tax filing season, AMT rules have changed under the One Big Beautiful Bill Act (OBBBA), bringing more taxpayers back into its scope.
Reese CPA Firm in Eden Prairie, MN helps Twin Cities individuals and business owners navigate AMT planning and minimize exposure.
What Is the Alternative Minimum Tax?
The AMT operates as a separate tax calculation that:
- Starts with your regular taxable income
- Adds back certain “tax preference items” (deductions, exclusions, credits disallowed under AMT)
- Applies AMT exemption amounts (similar to a standard deduction)
- Uses AMT tax rates (26% on first portion, 28% on excess)
- Compares the AMT amount to your regular tax – you pay whichever is higher
Key AMT triggers:
- State and local tax (SALT) deductions (fully disallowed under AMT)
- Incentive stock option (ISO) exercises
- Tax-exempt interest from private activity bonds
- Accelerated depreciation differences
- Large miscellaneous itemized deductions
2026 AMT Changes Under OBBBA – The "Phaseout Trap"
The One Big Beautiful Bill Act (OBBBA) made significant AMT changes effective for 2026 tax returns:
AMT Exemption Amounts (2026)
Single filers: $90,100
Married filing jointly: $140,200
Head of household: $125,100
Married filing separately: $70,100
Critical Change: Accelerated Phaseout
2025 Phaseout: 25% rate beginning at $626,350 (single) / $1,252,700 (joint)
2026 Phaseout: 50% rate beginning at $500,000 (single) / $1,000,000 (joint)
What this means: Once you cross the phaseout threshold, your AMT exemption disappears twice as fast as
before. A $100,000 increase in Alternative Minimum Taxable Income (AMTI) now eliminates $50,000 of exemption (vs. $25,000 previously).
AMT Calculation Example (2026 Married Joint Filer)
| Regular taxable income | $800,000 |
| Add back AMT preferences: | |
| SALT deduction | $40,000 |
| ISO bargain element | $200,000 |
| Private activity bond interest | $15,000 |
| AMTI before exemption | $1,055,000 |
| AMT exemption | $140,200 |
| Phaseout: ($1,055,000 - $1,000,000) × 50% | $27,500 |
| Net exemption | $112,700 |
| Tentative minimum taxable income | $942,300 |
| AMT Rates: | |
| First $232,600 × 26% | $60,476 |
| Remainder $709,700 × 28% | $198,716 |
| Total AMT | $259,192 |
Who Gets Hit by AMT in 2026?
High-risk profiles under new rules:
- High-tax state residents (MN, CA, NY) with large SALT deductions
- Executives with ISO exercises – bargain element creates AMTI spike
- Investors in private activity bonds – tax-exempt interest becomes taxable
- Real estate professionals with accelerated depreciation
- Households with uneven income (bonuses, RSU vesting, capital gains)
Twin Cities example: A married couple in Eden Prairie with $900,000 income + $40,000 SALT + $150,000 ISO exercise could face $40,000+ AMT liability under 2026 rules.
Key AMT Preferences and Add-Backs
| Disallowed/Reduced | AMT Treatment |
|---|---|
| State & Local Taxes | 100% disallowed |
| ISO Exercises | Bargain element fully taxable |
| Private Activity Bonds | Interest fully taxable |
| Depreciation | Slower MACRS method |
| Misc Itemized Deductions | 100% disallowed |
AMT Credit Opportunity
Good news: AMT paid due to timing differences (ISO exercises, depreciation timing, deferred compensation) generates a Minimum Tax Credit (MTC) usable in future years when regular tax exceeds AMT.
Bad news: Exclusion preferences (SALT, private activity bonds) create no credit.
5 AMT Planning Strategies for 2026
1. Timing Income and Deductions
Defer bonuses/RSUs to 2027
Accelerate deductions before phaseout threshold
2. ISO Exercise Planning
Spread exercises across multiple years
Consider selling immediately (disqualifying disposition)
Model AMT + MTC recovery
3. SALT Optimization
Prepay 2026 property taxes in December 2025
Consider property tax escrow adjustments
4. Investment Portfolio Review
Replace private activity bonds with regular munis
Evaluate accelerated depreciation assets
5. Minnesota-Specific Planning
Coordinate federal AMT with MN itemized deduction timing
Evaluate charitable bunching before/after AMT years
Why Reese CPA Firm in Eden Prairie Specializes in AMT Planning
Twin Cities taxpayers face unique AMT challenges:
- High Minnesota income taxes + property taxes push AMTI higher
- Tech/biotech executives with heavy ISO/RSU packages
- Real estate investors with depreciation preferences
- High concentration of private activity bond holders
From our Eden Prairie office, Reese CPA Firm provides:
- AMT exposure modeling (2025 vs 2026 side-by-side)
- ISO exercise optimization with MTC projections
- SALT timing strategies coordinated with Minnesota rules
- Minnesota AMT planning (state interaction analysis)
Schedule Your AMT Planning Consultation
2026 AMT changes affect returns filed in 2027, but planning must begin now for ISO exercises, SALT prepayments, and investment decisions.
Contact Reese CPA Firm in Eden Prairie, MN to:
- Model your 2026 AMT exposure under OBBBA rules
- Develop multi-year strategies around phaseout thresholds
- Coordinate federal AMT with Minnesota tax planning
Don’t let the accelerated AMT phaseout catch you by surprise. Proactive planning can save tens of thousands in unnecessary tax.