Michigan Treasury Announces 2026 Q1, Q2 Interest Rate for Tax Underpayments, Overpayments

Oct. 14, 2025, 6:56 PM UTC

The Michigan Department of Treasury announced the annual interest rates for underpayments and overpayments from Jan. 1 to June 30, 2026. The daily interest rate of 0.0002324, based on an adjusted annual rate of 8.48 percent, will be added to tax deficiencies or excessive claims during this period. [Mich. Dep’t of Treasury, Revenue Administrative Bulletin 2025-13, 10/14/25]

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