2006 Interest Rates; Underpayments and Overpayments

These documents are Revenue Rulings issued in IRS's weekly Internal Revenue Bulletin that announce quarterly changes in IRS Interest Rates for both underpayments and overpayments.

These Revenue Rulings are either in HTML or in the Adobe Acrobat PDF format. Internal Revenue Bulletin Summary pages are in HTML format.

Revenue Rulings	Bulletin	Date of IRB


Rev. Rul. 2006-49(HTML)	IRB #2006-40(HTML)	October 2, 2006
Interest rates; underpayments and overpayments. The rate of interest determined under section 6621 of the Code for the calendar quarter beginning October 1, 2006, will be 8 percent for overpayments (7 percent in the case of a corporation), 8 percent for underpayments, and 10 percent for large corporate underpayments. The rate of interest paid on the portion of a corporate overpayment exceeding $10,000 will be 5.5 percent.
Rev. Rul. 2006-30(HTML)	IRB #2006-25(HTML)	June 19, 2006
Interest rates; underpayments and overpayments. The rate of interest determined under section 6621 of the Code for the calendar quarter beginning July 1, 2006, will be 8 percent for overpayments (7 percent in the case of a corporation), 8 percent for underpayments, and 10 percent for large corporate underpayments. The rate of interest paid on the portion of a corporate overpayment exceeding $10,000 will be 5.5 percent.
Rev. Rul. 2006-12(HTML)	IRB #2006-12(HTML)	March 20, 2006
Interest rates; underpayments and overpayments. The rate of interest determined under section 6621 of the Code for the calendar quarter beginning April 1, 2006, will be 7 percent for overpayments (6 percent in the case of a corporation), 7 percent for underpayments, and 9 percent for large corporate underpayments. The rate of interest paid on the portion of a corporate overpayment exceeding $10,000 will be 4.5 percent.

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