The Michigan Department of Treasury recently published Revenue Administrative Bulletin 2021-5, which details the interest rate for underpayments and over payments for the period beginning on July 1, 2021 to December 31, 2021.
The interest rate for this period remains unchanged from the first half of 2021, at an annual rate of 4.25%.
To review the interest rate for this period, click here to visit the Department of Treasury’s website online.