The Michigan Department of Treasury has been made aware that some "Reminder of Tax Due" letters sent to taxpayers contain an incorrect toll-free (1-800) TTY number, which may connect callers to a potential scam. Taxpayers with questions regarding unpaid individual income taxes are asked to contact the Treasury directly at 517-636-4486. We apologize for any confusion or concern this may have caused.
Interest Rate Due on Underpayments and Overpayments
Interest Rates
Current Interest Rate
Period: July 1, 2025 - December 31, 2025
Annual Rate: 8.66%
Daily Rate: 0.0002373
Prior Interest Rate
Period: January 1, 2025 - June 30, 2025
Annual Rate: 9.47%
Daily Rate: 0.0002595