Irs Interest Rates 2024 On Payment Plans. 8% for overpayments (7% for corporations) 8% for the underpayment of taxes. The interest rate, adjusted quarterly, is currently 4% per year, compounded daily.
July 9, 2020 | last updated: The new irs interest rate charge on underpayments is 8%, except for large corporate underpayments, on which 10% interest is charged.