Introduction›Part I. Rulings and Decisions Under the Internal Revenue Code of 1986
Section 6621.—Determina- tion of Rate of Interest
Internal Revenue Bulletin 2006-25 · 2026-10-03 edition · updated 2026-10-04 · United States
26 CFR 301.6621–1: Interest rate.
Interest rates; underpayments and overpayments. The rate of interest determined under section 6621 of the Code
June 19, 2006 1134 2006–25 I.R.B.
Proc. 95–17, 1995–1 C.B. 556, 570, 573, 575, and 579. Annual interest rates to be compounded daily pursuant to section 6622 that apply for prior periods are set forth in the tables accompanying this revenue ruling.
DRAFTING INFORMATION
The principal author of this revenue ruling is Crystal Foster of the Office of Associate Chief Counsel (Procedure & Administration). For further information regarding this revenue ruling, contact Ms. Foster at (202) 622–7198 (not a toll-free call).
Notice 88–59, 1988–1 C.B. 546, announced that, in determining the quarterly interest rates to be used for overpayments and underpayments of tax under section 6621, the Internal Revenue Service will use the federal short-term rate based on daily compounding because that rate is most consistent with section 6621 which, pursuant to section 6622, is subject to daily compounding.
Rounded to the nearest full percent, the federal short-term rate based on daily compounding determined during the month of April 2006 is 5 percent. Accordingly, an overpayment rate of 8 percent (7 percent in the case of a corporation) and an under
payment rate of 8 percent are established for the calendar quarter beginning July 1, 2006. The overpayment rate for the portion of a corporate overpayment exceeding $10,000 for the calendar quarter beginning July 1, 2006, is 5.5 percent. The underpayment rate for large corporate underpayments for the calendar quarter beginning July 1, 2006, is 10 percent. These rates apply to amounts bearing interest during that calendar quarter.
Interest factors for daily compound interest for annual rates of 5.5 percent, 7 percent, 8 percent, and 10 percent are published in Tables 16, 19, 21, and 25 of Rev.
TABLE OF INTEREST RATES
PERIODS BEFORE JUL. 1, 1975 - PERIODS ENDING DEC. 31, 1986
OVERPAYMENTS AND UNDERPAYMENTS
PERIOD RATE
In 1995–1 C.B. DAILY RATE TABLE
Before Jul. 1, 1975 6% Table 2, pg. 557 Jul. 1, 1975—Jan. 31, 1976 9% Table 4, pg. 559 Feb. 1, 1976—Jan. 31, 1978 7% Table 3, pg. 558 Feb. 1, 1978—Jan. 31, 1980 6% Table 2, pg. 557 Feb. 1, 1980—Jan. 31, 1982 12% Table 5, pg. 560 Feb. 1, 1982—Dec. 31, 1982 20% Table 6, pg. 560 Jan. 1, 1983—Jun. 30, 1983 16% Table 37, pg. 591 Jul. 1, 1983—Dec. 31, 1983 11% Table 27, pg. 581 Jan. 1, 1984—Jun. 30, 1984 11% Table 75, pg. 629 Jul. 1, 1984—Dec. 31, 1984 11% Table 75, pg. 629 Jan. 1, 1985—Jun. 30, 1985 13% Table 31, pg. 585 Jul. 1, 1985—Dec. 31, 1985 11% Table 27, pg. 581 Jan. 1, 1986—Jun. 30, 1986 10% Table 25, pg. 579 Jul. 1, 1986—Dec. 31, 1986 9% Table 23, pg. 577
2006–25 I.R.B. 1135 June 19, 2006
TABLE OF INTEREST RATES
FROM JANUARY 1, 1999 - PRESENT
NONCORPORATE OVERPAYMENTS AND UNDERPAYMENTS
1995–1 C.B. RATE TABLE PG
Jan. 1, 1999—Mar. 31, 1999 7% 19 573 Apr. 1, 1999—Jun. 30, 1999 8% 21 575 Jul. 1, 1999—Sep. 30, 1999 8% 21 575 Oct. 1, 1999—Dec. 31, 1999 8% 21 575 Jan. 1, 2000—Mar. 31, 2000 8% 69 623 Apr. 1, 2000—Jun. 30, 2000 9% 71 625 Jul. 1, 2000—Sep. 30, 2000 9% 71 625 Oct. 1, 2000—Dec. 31, 2000 9% 71 625 Jan. 1, 2001—Mar. 31, 2001 9% 23 577 Apr. 1, 2001—Jun. 30, 2001 8% 21 575
June 19, 2006 1136 2006–25 I.R.B.
TABLE OF INTEREST RATES
FROM JANUARY 1, 1999 - PRESENT - Continued
NONCORPORATE OVERPAYMENTS AND UNDERPAYMENTS
1995–1 C.B. RATE TABLE PG
Jul. 1, 2001—Sep. 30, 2001 7% 19 573 Oct. 1, 2001—Dec. 31, 2001 7% 19 573 Jan. 1, 2002—Mar. 31, 2002 6% 17 571 Apr. 1, 2002—Jun. 30, 2002 6% 17 571 Jul. 1, 2002—Sep. 30, 2002 6% 17 571 Oct. 1, 2002—Dec. 31, 2002 6% 17 571 Jan. 1, 2003—Mar. 31, 2003 5% 15 569 Apr. 1, 2003—Jun. 30, 2003 5% 15 569 Jul. 1, 2003—Sep. 30, 2003 5% 15 569 Oct. 1, 2003—Dec. 31, 2003 4% 13 567 Jan. 1, 2004—Mar. 31, 2004 4% 61 615 Apr. 1, 2004—Jun. 30, 2004 5% 63 617 Jul. 1, 2004—Sep. 30, 2004 4% 61 615 Oct. 1, 2004—Dec. 31, 2004 5% 63 617 Jan. 1, 2005—Mar. 31, 2005 5% 15 569 Apr. 1, 2005—Jun. 30, 2005 6% 17 571 Jul. 1, 2005—Sep. 30, 2005 6% 17 571 Oct. 1, 2005—Dec. 31, 2005 7% 19 573 Jan. 1, 2006—Mar. 31, 2006 7% 19 573 Apr. 1, 2006—Jun. 30, 2006 7% 19 573 Jul. 1, 2006—Sep. 30, 2006 8% 21 575
2006–25 I.R.B. 1137 June 19, 2006
TABLE OF INTEREST RATES FOR LARGE CORPORATE UNDERPAYMENTS
FROM JANUARY 1, 1991 - PRESENT
1995–1 C.B. RATE TABLE PG
Jan. 1, 1991—Mar. 31, 1991 13% 31 585 Apr. 1, 1991—Jun. 30, 1991 12% 29 583 Jul. 1, 1991—Sep. 30, 1991 12% 29 583 Oct. 1, 1991—Dec. 31, 1991 12% 29 583 Jan. 1, 1992—Mar. 31, 1992 11% 75 629 Apr. 1, 1992—Jun. 30, 1992 10% 73 627 Jul. 1, 1992—Sep. 30, 1992 10% 73 627 Oct. 1, 1992—Dec. 31, 1992 9% 71 625 Jan. 1, 1993—Mar. 31, 1993 9% 23 577 Apr. 1, 1993—Jun. 30, 1993 9% 23 577 Jul. 1, 1993—Sep. 30, 1993 9% 23 577 Oct. 1, 1993—Dec. 31, 1993 9% 23 577 Jan. 1, 1994—Mar. 31, 1994 9% 23 577 Apr. 1, 1994—Jun. 30, 1994 9% 23 577 Jul. 1, 1994—Sep. 30, 1994 10% 25 579 Oct. 1, 1994—Dec. 31, 1994 11% 27 581 Jan. 1, 1995—Mar. 31, 1995 11% 27 581 Apr. 1, 1995—Jun. 30, 1995 12% 29 583 Jul. 1, 1995—Sep. 30, 1995 11% 27 581 Oct. 1, 1995—Dec. 31, 1995 11% 27 581 Jan. 1, 1996—Mar. 31, 1996 11% 75 629 Apr. 1, 1996—Jun. 30, 1996 10% 73 627 Jul. 1, 1996—Sep. 30, 1996 11% 75 629 Oct. 1, 1996—Dec. 31, 1996 11% 75 629 Jan. 1, 1997—Mar. 31, 1997 11% 27 581 Apr. 1, 1997—Jun. 30, 1997 11% 27 581 Jul. 1, 1997—Sep. 30, 1997 11% 27 581 Oct. 1, 1997—Dec. 31, 1997 11% 27 581 Jan. 1, 1998—Mar. 31, 1998 11% 27 581 Apr. 1, 1998—Jun. 30, 1998 10% 25 579 Jul. 1, 1998—Sep. 30, 1998 10% 25 579 Oct. 1, 1998—Dec. 31, 1998 10% 25 579 Jan. 1, 1999—Mar. 31, 1999 9% 23 577 Apr. 1, 1999—Jun. 30, 1999 10% 25 579 Jul. 1, 1999—Sep. 30, 1999 10% 25 579 Oct. 1, 1999—Dec. 31, 1999 10% 25 579 Jan. 1, 2000—Mar. 31, 2000 10% 73 627
June 19, 2006 1138 2006–25 I.R.B.
TABLE OF INTEREST RATES FOR LARGE CORPORATE UNDERPAYMENTS
FROM JANUARY 1, 1991 - PRESENT - Continued
1995–1 C.B. RATE TABLE PG
Apr. 1, 2000—Jun. 30, 2000 11% 75 629 Jul. 1, 2000—Sep. 30, 2000 11% 75 629 Oct. 1, 2000—Dec. 31, 2000 11% 75 629 Jan. 1, 2001—Mar. 31, 2001 11% 27 581 Apr. 1, 2001—Jun. 30, 2001 10% 25 579 Jul. 1, 2001—Sep. 30, 2001 9% 23 577 Oct. 1, 2001—Dec. 31, 2001 9% 23 577 Jan. 1, 2002—Mar. 31, 2002 8% 21 575 Apr. 1, 2002—Jun. 30, 2002 8% 21 575 Jul. 1, 2002—Sep. 30, 2002 8% 21 575 Oct. 1, 2002—Dec. 30, 2002 8% 21 575 Jan. 1, 2003—Mar. 31, 2003 7% 19 573 Apr. 1, 2003—Jun. 30, 2003 7% 19 573 Jul. 1, 2003—Sep. 30, 2003 7% 19 573 Oct. 1, 2003—Dec. 31, 2003 6% 17 571 Jan. 1, 2004—Mar. 31, 2004 6% 65 619 Apr. 1, 2004—Jun. 30, 2004 7% 67 621 Jul. 1, 2004—Sep. 30, 2004 6% 65 619 Oct. 1, 2004—Dec. 31, 2004 7% 67 621 Jan. 1, 2005—Mar. 31, 2005 7% 19 573 Apr. 1, 2005—Jun. 30, 2005 8% 21 575 Jul. 1, 2005—Sep. 30, 2005 8% 21 575 Oct. 1, 2005—Dec. 31, 2005 9% 23 577 Jan. 1, 2006—Mar. 31, 2006 9% 23 577 Apr. 1, 2006—Jun. 30, 2006 9% 23 577 Jul. 1, 2006—Sep. 30, 2006 10% 25 579
TABLE OF INTEREST RATES FOR CORPORATE
OVERPAYMENTS EXCEEDING $10,000
FROM JANUARY 1, 1995 - PRESENT
1995–1 C.B. RATE TABLE PG
Jan. 1, 1995—Mar. 31, 1995 6.5% 18 572 Apr. 1, 1995—Jun. 30, 1995 7.5% 20 574 Jul. 1, 1995—Sep. 30, 1995 6.5% 18 572 Oct. 1, 1995—Dec. 31, 1995 6.5% 18 572 Jan. 1, 1996—Mar. 31, 1996 6.5% 66 620 Apr. 1, 1996—Jun. 30, 1996 5.5% 64 618 Jul. 1, 1996—Sep. 30, 1996 6.5% 66 620 Oct. 1, 1996—Dec. 31, 1996 6.5% 66 620 Jan. 1, 1997—Mar. 31, 1997 6.5% 18 572 Apr. 1, 1997—Jun. 30, 1997 6.5% 18 572 Jul. 1, 1997—Sep. 30, 1997 6.5% 18 572 Oct. 1, 1997—Dec. 31, 1997 6.5% 18 572 Jan. 1, 1998—Mar. 31, 1998 6.5% 18 572 Apr. 1, 1998—Jun. 30, 1998 5.5% 16 570 Jul. 1, 1998—Sep. 30, 1998 5.5% 16 570 Oct. 1, 1998—Dec. 31, 1998 5.5% 16 570 Jan. 1, 1999—Mar. 31, 1999 4.5% 14 568 Apr. 1, 1999—Jun. 30, 1999 5.5% 16 570 Jul. 1, 1999—Sep. 30, 1999 5.5% 16 570 Oct. 1, 1999—Dec. 31, 1999 5.5% 16 570
2006–25 I.R.B. 1139 June 19, 2006
TABLE OF INTEREST RATES FOR CORPORATE
OVERPAYMENTS EXCEEDING $10,000
FROM JANUARY 1, 1995 - PRESENT - Continued
1995–1 C.B. RATE TABLE PG
Jan. 1, 2000—Mar. 31, 2000 5.5% 64 618 Apr. 1, 2000—Jun. 30, 2000 6.5% 66 620 Jul. 1, 2000—Sep. 30, 2000 6.5% 66 620 Oct. 1, 2000—Dec. 31, 2000 6.5% 66 620 Jan. 1, 2001—Mar. 31, 2001 6.5% 18 572 Apr. 1, 2001—Jun. 30, 2001 5.5% 16 570 Jul. 1, 2001—Sep. 30, 2001 4.5% 14 568 Oct. 1, 2001—Dec. 31, 2001 4.5% 14 568 Jan. 1, 2002—Mar. 31, 2002 3.5% 12 566 Apr. 1, 2002—Jun. 30, 2002 3.5% 12 566 Jul. 1, 2002—Sep. 30, 2002 3.5% 12 566 Oct. 1, 2002—Dec. 31, 2002 3.5% 12 566 Jan. 1, 2003—Mar. 31, 2003 2.5% 10 564 Apr. 1, 2003—Jun. 30, 2003 2.5% 10 564 Jul. 1, 2003—Sep. 30, 2003 2.5% 10 564 Oct. 1, 2003—Dec. 31, 2003 1.5% 8 562 Jan. 1, 2004—Mar. 31, 2004 1.5% 56 610 Apr. 1, 2004—Jun. 30, 2004 2.5% 58 612 Jul. 1, 2004—Sep. 30, 2004 1.5% 56 610 Oct. 1, 2004—Dec. 31, 2004 2.5% 58 612 Jan. 1, 2005—Mar. 31, 2005 2.5% 10 564 Apr. 1, 2005—Jun. 30, 2005 3.5% 12 566 Jul. 1, 2005—Sep. 30, 2005 3.5% 12 566 Oct. 1, 2005—Dec. 31, 2005 4.5% 14 568 Jan. 1, 2006—Mar. 31, 2006 4.5% 14 568 Apr. 1, 2006—Jun. 30, 2006 4.5% 14 568 Jul. 1, 2006—Sep. 30, 2006 5.5% 16 570
June 19, 2006 1140 2006–25 I.R.B.
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