IRC §6602. Interest on erroneous refund recoverable by suit

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Any portion of an internal revenue tax (or any interest, assessable penalty, additional amount, or addition to tax) which has been erroneously refunded, and which is recoverable by suit pursuant to section 7405, shall bear interest at the underpayment rate established under section 6621 from the date of the payment of the refund.

(Aug. 16, 1954, ch. 736, 68A Stat. 818; Pub. L. 93–625, §7(a)(2)(B), Jan. 3, 1975, 88 Stat. 2115; Pub. L. 99– 4, title XV, §1 1(c)(12), Oct. 22, 1986, 100 Stat. 2745.)

Amendments

1986—Pub. L. 99– 4 substituted “the underpayment rate established under section 6621” for “an annual rate established under section 6621”.

1975—Pub. L. 93–625 substituted “an annual rate established under section 6621” for “the rate of 6 percent per annum”.

Effective Date of 1986 Amendment

Amendment by Pub. L. 99– 4 applicable for purposes of determining interest for periods after Dec. 31, 1986, see section 1 1(d) of Pub. L. 99– 4, set out as a note under section 47 of this title.

Effective Date of 1975 Amendment

Amendment by Pub. L. 93–625 effective July 1, 1975, and applicable to amounts outstanding on such date or arising thereafter, see section 7(e) of Pub. L. 93–625, set out as an Effective Date note under section 6621 of this title.