WASHINGTON – The Internal Revenue Service today announced that interest rates increased for the calendar quarter beginning April 1, 2018.  The rates will be:

• five (5) percent for overpayments [four (4) percent in the case of a corporation];
• two and one-half (2.5) percent for the portion of a corporate overpayment exceeding $10,000;
• five (5) percent for underpayments; and
• seven (7) percent 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.  Read More