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Alternative Minimum Tax (AMT) Estimator: 2026 AMT Liability Tool

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AMT Estimator

Determine if you owe the Alternative Minimum Tax under 2026 rules.

Your income after standard or itemized deductions.
Your tax before AMT is applied.
Common AMT Adjustments
State/Local taxes are not deductible for AMT.
Market value minus exercise price for ISOs.
Estimated AMT Owed
$0
No AMT Liability
Total AMTI $0
Available Exemption $0
Tentative Minimum Tax $0

2026 Parameters: Exemption is $90,100 (Single) / $140,200 (Married). Phase-out begins at $500,000 (Single) / $1,000,000 (Married) at a rate of 50%. The AMT rate is 26% on the first $244,500 of excess AMTI and 28% thereafter.

The Alternative Minimum Tax (AMT) is a parallel tax system designed to ensure that high-earners with significant deductions still pay a minimum amount of federal tax. Our AMT Estimator is a professional-grade digital utility updated for the 2026 tax year, incorporating the latest adjustments from the “One, Big, Beautiful Bill” (OBBBA). This tool helps you project whether you might be subject to the AMT by calculating your Alternative Minimum Taxable Income (AMTI), applying the 2026 exemption amounts ($90,100 for singles, $140,200 for joint filers), and factoring in the new, more aggressive 50% exemption phase-out thresholds starting at $500,000 (Single) and $1,000,000 (Married). The calculator accounts for common “preference items” like the disallowed State and Local Tax (SALT) deduction and the bargain element of exercised Incentive Stock Options (ISOs). Featuring a premium white glassmorphic design and a 100% private, browser-based architecture, this tool ensures your sensitive financial data never leaves your device. Determine your tentative minimum tax and compare it against your regular tax liability to avoid year-end surprises and optimize your 2026 tax strategy.