Michigan has a flat individual income tax of 4.25% on taxable income for the 2026 tax year (MCL 206.51(1)(b)). Since 2023 the law can lower the rate for a single tax year when general fund revenue grows faster than inflation (MCL 206.51(1)(c)); for 2026 the Department of Treasury determined the conditions were not met — general fund revenue fell 1.56% in fiscal year 2025 while inflation was 2.70% — so the rate in effect under state law for 2026 stays at 4.25%. The rate is set again each year from the prior fiscal year's figures.
“Except as otherwise provided under subdivision (c), on and after October 1, 2012, 4.25%.”
Read on Nov 13, 2026 from legislature.mi.gov.
Checked once · Nov 13, 2026