Interest Rates Increase for the Fourth Quarter 2008
The IRS announced that interest rates for the calendar quarter beginning October 1, 2008, will rise by a full percentage point. The interest rates are:
6 % for overpayments (5 percent in the case of a corporation);
6% for underpayments;
8% for large corporate underpayments; and
3.5% for the portion of a corporate overpayment exceeding $10,000.