IR-2005-140, Dec. 8, 2005 WASHINGTON — The Internal Revenue Service today announced there will be no change in the interest rates for the calendar quarter beginning January 1, 2006. The interest rates are as follows: seven (7) percent for overpayments [six (6) percent in the case of a corporation]; seven (7) percent for underpayments; nine (9) percent for large corporate underpayments; and four and one-half (4.5) percent for the portion of a corporate overpayment exceeding $10,000. 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 based on daily compounding determined during October 2005. Related Item: Revenue Ruling 2005-78 PDF Subscribe to IRS Newswire
