Individual income tax: rate; rollback of rate to 3.9% and elimination of rollback trigger; provide for. Amends sec. 51 of 1967 PA 281 (MCL 206.51).

Michigan House Bill 6225 permanently reduces the state individual income tax rate to 3.9% starting in 2028, eliminating a previous automatic mechanism that could have lowered the rate further based on general fund revenue growth. The bill establishes a phased reduction schedule, lowering the tax from 4.15% in 2026 to 4.0% in 2027 before reaching the final rate. It also mandates specific annual deposits from income tax collections into the state school aid fund and the renew Michigan infrastructure fund, with the latter receiving $69 million per year beginning in fiscal year 2030.