IR-2022-42, February 23, 2022 WASHINGTON — The Internal Revenue Service today announced that interest rates will increase for the calendar quarter beginning April 1, 2022. The rates will be: 4% for overpayments (3% in the case of a corporation); 1.5% for the portion of a corporate overpayment exceeding $10,000; 4% for underpayments; and 6% for large corporate underpayments. Under the Internal Revenue Code, the rate of interest is determined on a quarterly basis. For taxpayers other than corporations, the overpayment and underpayment rate is the federal short-term rate plus 3 percentage points. Generally, in the case of a corporation, the underpayment rate is the federal short-term rate plus 3 percentage points and the overpayment rate is the federal short-term rate plus 2 percentage points. The rate for large corporate underpayments is the federal short-term rate plus 5 percentage points. The rate on the portion of a corporate overpayment of tax exceeding $10,000 for a taxable period is the federal short-term rate plus one-half (0.5) of a percentage point. The interest rates announced today are computed from the federal short-term rate determined during January 2022 to take effect February 1, 2022, based on daily compounding. Revenue Ruling 2022-05PDF announcing the rates of interest, will appear in Internal Revenue Bulletin 2022-10, dated March 7, 2022.