[Code of Federal Regulations]
[Title 26, Volume 18]
[Revised as of April 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 26CFR301.6611-1]

[Page 394-396]
 
                       TITLE 26--INTERNAL REVENUE
 
    CHAPTER I--INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY 
                               (CONTINUED)
 
PART 301_PROCEDURE AND ADMINISTRATION--Table of Contents
 
                                Interest
 
Sec. 301.6611-1  Interest on overpayments.

    (a) General rule. Except as otherwise provided, interest shall be 
allowed on any overpayment of any tax at the annual rate referred to in 
the regulations under section 6621 from the date of overpayment of the 
tax.
    (b) Date of overpayment. Except as provided in section 6401(a), 
relating to assessment and collection after the expiration of the 
applicable period of limitation, there can be no overpayment of tax 
until the entire tax liability has been satisfied. Therefore, the dates 
of overpayment of any tax are the date of payment of the first amount 
which (when added to previous payments) is in excess of the tax 
liability (including any interest, addition to the tax, or additional 
amount) and the dates of payment of all amounts subsequently paid with 
respect to such tax liability. For rules relating to the determination 
of the date of payment in the case of an advance payment of tax, a 
payment of estimated tax, and a credit for income tax withholding, see 
paragraph (d) of this section.
    (c) Examples. The application of paragraph (b) may be illustrated by 
the following examples:

    Example 1. Corporation X files an income tax return on March 15, 
1955, for the calendar year 1954 disclosing a tax liability of $1,000 
and elects to pay the tax in installments. Subsequent to payment of the 
final installment, the correct tax liability is determined to be $900.

                              Tax liability
Assessed.......................................................   $1,000
Correct liability..............................................      900
                                                                --------
Overassessment.................................................      100

                           Record of payments

Mar. 15, 1955..................................................     $500
June 15, 1955..................................................      500



Since the correct liability in this case is $900, the payment of $500 
made on March 15, 1955, and $400 of the payment made on June 15, 1955, 
are applied in satisfaction of the tax liability. The balance of the 
payment made on June 15, 1955 ($100) constitutes the amount of the 
overpayment, and the date on which such payment was made would be the 
date of the overpayment from which interest would be computed.
    Example 2. Corporation Y files an income tax return for the calendar 
year 1954 on March 15, 1955, disclosing a tax liability of $50,000, and 
elects to pay the tax in installments. On October 15, 1956, a deficiency 
in the amount of $10,000 is assessed and is paid in equal amounts on 
November 15 and November 26, 1956. On April 15, 1957, it is determined 
that the correct tax liability of the taxpayer for 1954 is only $35,000.

                              Tax liability
Original assessment...........................................   $50,000
Deficiency assessment.........................................    10,000
                                                               ---------
Total assessed................................................    60,000
Correct liability.............................................    35,000
                                                               ---------
Overassessment................................................    25,000

                           Record of payments

Mar. 15, 1955.................................................   $25,000
June 15, 1955.................................................    25,000
Nov. 15, 1956.................................................     5,000
Nov. 26, 1956.................................................     5,000



Since the correct liability in this case is $35,000, the entire payment 
of $25,000 made on March 15, 1955, and $10,000 of the payment made on 
June 15, 1955, are applied in satisfaction of the tax liability. The 
balance of the payment made on June 15, 1955 ($15,000), plus the amounts 
paid on November 15 ($5,000), and November 26, 1956 ($5,000), constitute 
the amount of the overpayment. The dates of the overpayments from which 
interest would be computed are as follows:

------------------------------------------------------------------------
                                                              Amount of
                            Date                             overpayment
------------------------------------------------------------------------
June 15, 1955..............................................      $15,000
Nov. 15, 1956..............................................        5,000
Nov. 26, 1956..............................................        5,000
------------------------------------------------------------------------

The amount of any interest paid with respect to the deficiency of 
$10,000 is also an overpayment.

    (d) Advance payment of tax, payment of estimated tax, and credit for 
income tax withholding. In the case of an advance payment of tax, a 
payment of estimated income tax, or a credit for income tax withholding, 
the provisions of

[[Page 395]]

section 6513 (except the provisions of subsection (c) thereof), 
applicable in determining the date of payment of tax for purposes of the 
period of limitations on credit or refund, shall apply in determining 
the date of overpayment for purposes of computing interest thereon.
    (e) Refund of income tax caused by carryback. If any overpayment of 
tax imposed by subtitle A of the Code results from the carryback of a 
net operating loss, a net capital loss, an investment credit, or a work 
incentive (WIN) credit, such overpayment, for purposes of this section, 
shall be deemed not to have been made prior to the end of the taxable 
year in which the loss or credit arises, or, with respect to any portion 
of an investment credit carryback or a WIN credit carryback from a 
taxable year attributable to a net operating loss carryback or a capital 
loss carryback from a subsequent taxable year, such overpayment shall be 
deemed not to have been made prior to the close of such subsequent 
taxable year.
    (f) Refund of income tax caused by carryback of foreign taxes. For 
purposes of paragraph (a) of this section, any overpayment of tax 
resulting from a carryback of tax paid or accrued to foreign countries 
or possessions of the United States shall be deemed not to have been 
paid or accrued before the close of the taxable year under subtitle F of 
the Code in which such taxes were in fact paid or accrued.
    (g) Period for which interest allowable in case of refunds. If an 
overpayment of tax is refunded, interest shall be allowed from the date 
of the overpayment to a date determined by the district director or the 
director of the regional service center, which shall be not more than 30 
days prior to the date of the refund check. The acceptance of a refund 
check shall not deprive the taxpayer of the right to make a claim for 
any additional overpayment and interest thereon, provided the claim is 
made within the applicable period of limitation. However, if a taxpayer 
does not accept a refund check, no additional interest on the amount of 
the overpayment included in such check shall be allowed.
    (h) Period for which interest allowable in case of credits--(1) 
General rule. If an overpayment of tax is credited, interest shall be 
allowed from the date of overpayment to the due date (as determined 
under subparagraph (2) of this paragraph (h)) of the amount against 
which such overpayment is credited.
    (2) Determination of due date--(i) In general. The term ``due 
date'', as used in this section, means the last day fixed by law or 
regulations for the payment of the tax (determined without regard to any 
extension of time), and not the date on which the district director or 
the director of the regional service center makes demand for the payment 
of the tax. Therefore, the due date of a tax (other than an additional 
assessment subject to the special rule provided by subdivision (iv) of 
this subparagraph) is the date fixed for the payment of the tax or the 
several installments thereof.
    (ii) Tax payable in installments--(a) In general. In the case of a 
credit against a tax, where the taxpayer had properly elected to pay the 
tax in installments, the due date is the date prescribed for the payment 
of the installment against which the credit is applied.
    (b) Delinquent installment. If the taxpayer is delinquent in payment 
of an installment of tax and a notice and demand has been issued for the 
payment of the delinquent installment and the remaining installments, 
the due date of each remaining installment shall then be the date of 
such notice and demand.
    (iii) Tax or installment not yet due. If a taxpayer agrees to the 
crediting of an overpayment against tax or an installment of tax and the 
schedule of allowance is signed prior to the date on which such tax or 
installment would otherwise become due, then the due date of such tax or 
installment shall be the date on which such schedule is signed.
    (iv) Additional assessment satisfied by credit before January 1, 
1958. In the case of a credit made before January 1, 1958, against an 
additional assessment, the due date of the tax satisfied by the credit 
is the date the additional assessment was made. For purposes of this 
subdivision, the term ``additional assessment'' means a further 
assessment

[[Page 396]]

of a tax of the same character previously paid in part, and includes the 
assessment of a deficiency as defined in section 6211.
    (v) Interest. In the case of a credit against interest that accrues 
for any period ending prior to January 1, 1983, the due date is the 
earlier of the date of assessment of such interest or December 31, 1982. 
In the case of a credit against interest that accrues for any period 
beginning on or after December 31, 1982, such interest is due as it 
economically accrues on a daily basis, rather than when it is assessed.
    (vi) Additional amount, addition to the tax, or assessable penalty. 
In the case of a credit against an additional amount, addition to the 
tax, or assessable penalty, the due date is the earlier of the date of 
assessment or the date from which such amount would bear interest if not 
satisfied by payment or credit.
    (vii) Estimated income tax for succeeding year. If the taxpayer 
elects to have all or part of the overpayment shown by his return 
applied to his estimated tax for his succeeding taxable year, no 
interest shall be allowed on such portion of the overpayment credited 
and such amount shall be applied as a payment on account of the 
estimated tax for such year or the installments thereof.
    (i) [Reserved]
    (j) Refund of overpayment. No interest shall be allowed on any 
overpayment of tax imposed by subtitle A of the Code if such overpayment 
is refunded--
    (1) In the case of a return filed on or before the last date 
prescribed for filing the return of such tax (determined without regard 
to any extension of time for filing such return), within 45 days after 
such last date, or
    (2) After December 17, 1966, in the case of a return filed after the 
last day prescribed for filing the return, within 45 days after the date 
on which the return is filed.

However, in the case of any overpayment of tax by an individual (other 
than an estate or trust and other than a nonresident alien individual) 
for a taxable year beginning in 1974, ``60 days'' shall be substituted 
for ``45 days'' each place it appears in this paragraph.
    (k) Effective date. Paragraphs (h)(2)(v) and (h)(2)(vi) of this 
section are effective for credits made on or after August 25, 1992.

[32 FR 15241, Nov. 3, 1967, as amended by T.D. 7301, 39 FR 979, Jan. 4, 
1974; T.D. 7384, 40 FR 49325, Oct. 22, 1975; T.D. 7415, 41 FR 14369, 
Apr. 5, 1976; T.D. 8524, 59 FR 10076, Mar. 3, 1994]

                     Determination of Interest Rate