Interest rates charged by the IRS on underpaid taxes and paid by the IRS on tax overpayments will remain the same for the second quarter of 2013 (April 1 through June 30). Therefore, for the first six months of 2013, the rates will be the following for individuals and corporations:
* 3% charged on underpayments; 3% paid on overpayments.
For corporations: * 3% charged on underpayments; 2% paid on overpayments.
* 5% charged on large corporate underpayments.
* ½% paid on the portion of a corporate overpayment exceeding $10,000.