What are the IRS Underpayment rates ?

The Internal Revenue Service announced that interest rates for the calendar quarter beginning January 1, 2011, will decrease by one percentage point. The rates will be: three (3) percent for overpayments [two (2) percent in the case of a corporation]; three (3) percent for underpayments; five (5) percent for large corporate underpayments; and zero and one-half (0.5) percent for the portion of a corporate overpayment exceeding $10,000. Interest rates for the calendar quarter beginning July 1, 2011, will remain the same as in the previous quarter April 2011-June 30th 2011. The rates will be: four (4) percent for overpayments [three (3) percent in the case of a corporation]; four (4) percent for underpayments; six (6) percent for large corporate underpayments; and one and one-half (1.5) percent for the portion of a corporate overpayment exceeding $10,000. Interest rates will decrease for the calendar quarter beginning Oct. 1, 2011. The rates will be: three (3) percent for overpayments [two (2) percent in the case of a corporation]; three (3) percent for underpayments; five (5) percent for large corporate underpayments; and zero and one-half (0.5) percent for the portion of a corporate overpayment exceeding $10,000.