REVENUE RULE 90-47

1990-1 C.B. 187, 1990-23 I.R.B. 6.

Internal Revenue Service
Revenue Ruling

INTEREST RATES; UNDERPAYMENTS AND OVERPAYMENTS

Published: May 17, 1990

Section 6621. - Determination of Interest Rate, 26 CFR 301.6621-1: Interest rate.
Interest rates; underpayments and overpayments. The rate of interest determined under section 6621 of the Code for the calendar quarter beginning July 1, 1990, will remain at 10 percent for overpayments and 11 percent for underpayments.

Section 6621 of the Internal Revenue Code establishes differential rates for allowance of interest on tax overpayments and assessment of interest on tax underpayments. Under section 6621(a)(1), the overpayment rate is the sum of the federal short-term rate plus 2 percentage points. Under section 6621(a)(2), the underpayment rate is the sum of the federal short-term rate plus 3 percentage points.

Section 6621(b)(1) of the Code provides that the Secretary shall determine the federal short-term rate for the first month in each calendar quarter.

Section 6621(b)(2)(A) of the Code provides that the federal short-term rate determined under section 6621(b)(1) for any month shall apply during the first calendar quarter beginning after such month.

Section 6621(b)(3) of the Code provides that the federal short-term rate for any month shall be the federal short-term rate determined during such month by the Secretary in accordance with section 1274(d), rounded to the nearest full percent (or, if a multiple of 1/2 of 1 percent, the rate shall be increased to the next highest full percent).

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 of the Code, 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 1990 is 8 percent. Accordingly, an overpayment rate of 10 percent and an underpayment rate of 11 percent are established for the calendar quarter beginning July 1, 1990.

Interest factors for daily compound interest for annual rates of 10 percent and 11 percent were published in Tables 16 and 17 of Rev. Proc. 83-7, 1983-1 C.B. 583, 599, 600.

Annual interest rates to be compounded daily pursuant to section 6622 of the Code that apply for prior periods are set forth in the accompanying tables.

DRAFTING INFORMATION

The principal author of this revenue ruling is Mary Jane Kossar of the Office of Assistant Chief Counsel (Income Tax and Accounting). For further information regarding this revenue ruling, contact Ms. Kossar on (202) 566-3453 (not a toll-free call).

TABLE OF INTEREST RATES
PERIODS BEFORE JUL. 1, 1975 - DEC. 31, 1986

         Before Jul. 1, 1975  6% Table   2, pg. 586

Jul. 1, 1975 - Jan. 31, 1976  9% Table  4, pg. 588

Feb. 1, 1976 - Jan. 31, 1978  7% Table  3, pg. 587

Feb. 1, 1978 - Jan. 31, 1980  6% Table  2, pg. 586

Feb. 1, 1980 - Jan. 31, 1982 12% Table  5, pg. 588

Feb. 1, 1982 - Dec. 31, 1982 20% Table  6, pg. 588

Jan. 1, 1983 - Jun. 30, 1983 16% Table 22, pg. 605

Jul. 1, 1983 - Dec. 31, 1983 11% Table 17, pg. 600

Jan. 1, 1984 - Jun. 30, 1984 11% Table 41, pg. 625

Jul. 1, 1984 - Dec. 31, 1984 11% Table 41, pg. 625

Jan. 1, 1985 - Jun. 30, 1985 13% Table 19, pg. 602

Jul. 1, 1985 - Dec. 31, 1985 11% Table 17, pg. 600

Jan. 1, 1986 - Jun. 30, 1986 10% Table 16, pg. 599

Jul. 1, 1986 - Dec. 31, 1986  9% Table 15, pg. 598

TABLE OF INTEREST RATES
FROM JAN. 1, 1987 - PRESENT

Jan. 1, 1987 - Mar. 31, 1987  8% 14 597  9% 15 598

Apr. 1, 1987 - Jun. 30, 1987  8% 14 597  9% 15 598

Jul. 1, 1987 - Sep. 30, 1987  8% 14 597  9% 15 598

Oct. 1, 1987 - Dec. 31, 1987  9% 15 598 10% 16 599

Jan. 1, 1988 - Mar. 31, 1988 10% 40 624 11% 41 625

Apr. 1, 1988 - Jun. 30, 1988  9% 39 623 10% 40 624

Jul. 1, 1988 - Sep. 30, 1988  9% 39 623 10% 40 624

Oct. 1, 1988 - Dec. 31, 1988 10% 40 624 11% 41 625

Jan. 1, 1989 - Mar. 31, 1989 10% 16 599 11% 17 600

Apr. 1, 1989 - Jun. 30, 1989 11% 17 600 12% 18 601

Jul. 1, 1989 - Sep. 30, 1989 11% 17 600 12% 18 601

Oct. 1, 1989 - Dec. 31, 1989 10% 16 599 11% 17 600

Jan. 1, 1990 - Mar. 31, 1990 10% 16 599 11% 17 600

Apr. 1, 1990 - Jun. 30, 1990 10% 16 599 11% 17 600

Jul. 1, 1990 - Sep. 30, 1990 10% 16 599 11% 17 600

Rev. Rul. 90-47, 1990-1 C.B. 187, 1990-23 I.R.B. 6.