WASHINGTON - The Internal Revenue Service today announced there will be no change in the interest rates for the calendar quarter beginning April 1, 2007.  The interest rates are as follows: 

• eight (8) percent for overpayments [seven (7) percent in the case of a corporation];
• eight (8) percent for underpayments;
• ten (10) percent for large corporate underpayments; and
• five and one-half (5.5) 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 2007.