

IR-2004-27, Mar. 1, 2004
WASHINGTON — The Internal Revenue Service today announced that interest rates will rise by one percentage point for the calendar quarter beginning April 1, 2004. The interest rates are as follows:

five (5) percent for overpayments [four (4) percent in the case of a corporation];


five (5) percent for underpayments;


seven (7) percent for large corporate underpayments; and


two and one-half (2.5) 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 January 2004.
Related Item: Rev. Rul. 2004-26 (52KPDF), setting the new interest rates
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