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Tax year 2025 · FL

Florida ISO AMT in 2025

The 2025 federal AMT exemption, phase-out thresholds, and Florida (no state AMT) for ISO exercises.

The 2025 picture for Florida residents

Florida has no state income tax, so the 2025 tax picture for its residents was entirely federal: ordinary rates up to 37%, capital gains up to 23.8%, and federal Medicare taxes. That was the structural advantage that drove tech-employee relocations into Florida throughout the decade.

2025 AMT exemption

The 2025 federal AMT exemption was $88,100 for single filers. The exemption phased out at 25 cents per dollar of AMTI above $626,350, fully eliminating the exemption for higher earners. That is why ISO exercises in Florida during 2025 produced AMT bills that surprised people running first-order mental math.

Florida layer in 2025

Florida did not impose a separate state AMT in 2025, so federal AMT was the only layer. State ordinary tax still applied to any disqualifying disposition income recognized in the same year.

Frequently asked

What supplemental-wage withholding rate applied to RSU income in Florida in 2025?
The federal supplemental-wage withholding rate was 22% on the first $1,000,000 of supplemental wages per calendar year, rising to 37% above that. Florida does not impose a state income tax on wages, so no state withholding applied.
Did Florida recognize federal QSBS exclusion in 2025?
Florida has no state income tax, so QSBS eligibility affects only federal tax. Federal Section 1202 treatment applied in 2025 identically for Florida residents.
What was the top federal ordinary bracket in 2025, and how did it apply to Florida residents?
The 37% federal ordinary bracket started around $626,350 of taxable income for single filers in 2025. Florida added nothing at the state level, producing a combined top marginal rate of approximately 37%.

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