Interest on Underpayments
- SECTION § 301.6601-1 - Interest on underpayments.
- SECTION § 301.6602-1 - Interest on erroneous refund recoverable by suit.
- SECTION § 301.6611-1 - Interest on overpayments.
- SECTION § 301.6621-1 - Interest rate.
- SECTION § 301.6621-2T - Questions and answers relating to the increased rate of interest on substantial underpayments attributable to certain tax motivated transactions (temporary).
- SECTION § 301.6621-3 - Higher interest rate payable on large corporate underpayments.
- SECTION § 301.6622-1 - Interest compounded daily.
Interest on Underpayments
§ 301.6601-1 - Interest on underpayments.
(a) General rule. (1) Interest at the annual rate referred to in the regulations under section 6621 shall be paid on any unpaid amount of tax from the last date prescribed for payment of the tax (determined without regard to any extension of time for payment) to the date on which payment is received.
(2) For provisions requiring the payment of interest during the period occurring before July 1, 1975, see section 6601(a) prior to its amendment by section 7 of the Act of Jan. 3, 1975 (Pub. L. 93-625, 88 Stat. 2115).
(b) Satisfaction by credits made after December 31, 1957—(1) In general. If any portion of a tax is satisfied by the credit of an overpayment after December 31, 1957, interest shall not be imposed under section 6601 on such portion of the tax for any period during which interest on the overpayment would have been allowable if the overpayment had been refunded.
(2) Examples. The provisions of this paragraph may be illustrated by the following examples:
Example 1.An examination of A's income tax returns for the calendar years 1955 and 1956 discloses an underpayment of $800 for 1955 and an overpayment of $500 for 1956. Interest under section 6601(a) ordinarily accrues on the underpayment of $800 from April 15, 1956, to the date of payment. However, the 1956 overpayment of $500 is credited after December 31, 1957, against the underpayment in accordance with the provisions of section 6402(a) and § 301.6402-1. Under such circumstances interest on the $800 underpayment runs from April 15, 1956, the last date prescribed for payment of the 1955 tax, to April 15, 1957, the date the overpayment of $500 was made. Since interest would have been allowed on the overpayment, if refunded, from April 15, 1957, to a date not more than 30 days prior to the date of the refund check, no interest is imposed after April 15, 1957, on $500, the portion of the underpayment satisfied by credit. Interest continues to run, however, on $300 (the $800 underpayment for 1955 less the $500 overpayment for 1956) to the date of payment. Example 2.An examination of A's income tax returns for the calendar years 1956 and 1957 discloses an overpayment, occurring on April 15, 1957, of $700 for 1956 and an underpayment of $400 for 1957. After April 15, 1958, the last date prescribed for payment of the 1957 tax, the district director credits $400 of the overpayment against the underpayment. In such a case, interest will accrue upon the overpayment of $700 from April 15, 1957, to April 15, 1958, the due date of the amount against which the credit is taken. Interest will also accrue under section 6611 upon $300 ($700 overpayment less $400 underpayment) from April 15, 1958, to a date not more than 30 days prior to the date of the refund check. Since a refund of the portion of the overpayment credited against the underpayment would have resulted in interest running upon such portion from April 15, 1958, to a date not more than 30 days prior to the date of the refund check, no interest is imposed upon the underpayment.(c) Last date prescribed for payment. (1) In determining the last date prescribed for payment, any extension of time granted for payment of tax (including any postponement elected under section 6163(a)) shall be disregarded. The granting of an extension of time for the payment of tax does not relieve the taxpayer from liability for the payment of interest thereon during the period of the extension. Thus, except as provided in paragraph (b) of this section, interest at the annual rate referred to in the regulations under section 6621 is payable on any unpaid portion of the tax for the period during which such portion remains unpaid by reason of an extension of time for the payment thereof.
(2)(i) If a tax or portion thereof is payable in installments in accordance with an election made under section 6152(a) or 6156(a), the last date prescribed for payment of any installment of such tax or portion thereof shall be determined under the provisions of section 6152(b) or 6156(b), as the case may be, and interest shall run on any unpaid installment from such last date to the date on which payment is received. However, in the event installment privileges are terminated for failure to pay an installment when due as provided by section 6152(d) and the time for the payment of any remaining installment is accelerated by the issuance of a notice and demand therefor, interest shall run on such unpaid installment from the date of the notice and demand to the date on which payment is received. But see section 6601(e)(4).
(ii) If the tax shown on a return is payable in installments, interest will run on any tax not shown on the return from the last date prescribed for payment of the first installment. If a deficiency is prorated to any unpaid installments, in accordance with section 6152(c), interest shall run on such prorated amounts from the date prescribed for the payment of the first installment to the date on which payment is received.
(3) If, by reason of jeopardy, a notice and demand for payment of any tax is issued before the last date otherwise prescribed for payment, such last date shall nevertheless be used for the purpose of the interest computation, and no interest shall be imposed for the period commencing with the date of the issuance of the notice and demand and ending on such last date. If the tax is not paid on or before such last date, interest will automatically accrue from such last date to the date on which payment is received.
(4) In the case of taxes payable by stamp and in all other cases where the last date for payment of the tax is not otherwise prescribed, such last date for the purpose of the interest computation shall be deemed to be the date on which the liability for the tax arose. However, such last date shall in no event be later than the date of issuance of a notice and demand for the tax.
(d) Suspension of interest; waiver of restrictions on assessment. In the case of a deficiency determined by a district director (or an assistant regional commissioner, appellate) with respect to any income, estate, gift, or chapter 41, 42, 43, or 44 tax, if the taxpayer files with such internal revenue officer an agreement waiving the restrictions on assessment of such deficiency, and if notice and demand for payment of such deficiency is not made within 30 days after the filing of such waiver, no interest shall be imposed on the deficiency for the period beginning immediately after such 30th day and ending on the date notice and demand is made. In the case of an agreement with respect to a portion of the deficiency, the rules as set forth in this paragraph are applicable only to that portion of the deficiency to which the agreement relates.
(e) Income tax reduced by carryback. (1) The carryback of a net operating loss, net capital loss, investment credit, or a work incentive program (WIN) credit shall not affect the computation of interest on any income tax for the period commencing with the last day prescribed for the payment of such tax and ending with the last day of the taxable year in which the loss or credit arises. For example, if the carryback of a net operating loss, a net capital loss, an investment credit, or a WIN credit to a prior taxable period eliminates or reduces a deficiency in income tax for that period, the full amount of the deficiency will nevertheless bear interest at the annual rate referred to in the regulations under section 6621 from the last date prescribed for payment of such tax until the last day of the taxable year in which the loss or credit arose. Interest will continue to run beyond such last day on any portion of the deficiency which is not eliminated by the carryback. 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 investment credit carryback or WIN credit carryback shall not affect the computation of interest on any income tax for the period commencing with the last day prescribed for the payment of such tax and ending with the last day of such subsequent taxable year.
(2) Where an extension of time for payment of income tax has been granted under section 6164 to a corporation expecting a net operating loss carryback or a net capital loss carryback, interest is payable at the annual rate established under section 6621 on the amount of such unpaid tax from the last date prescribed for payment thereof without regard to such extension.
(3) Where there has been an allowance of an overpayment attributable to a net operating loss carryback, a capital loss carryback, an investment credit carryback, or a WIN credit carryback and all or part of such allowance is later determined to be excessive, interest shall be computed on the excessive amount from the last day of the year in which the net operating loss, net capital loss, investment credit, or WIN credit arose until the date on which the repayment of such excessive amount is received. Where there has been an allowance of an overpayment 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 and all or part of such allowance is later determined to be excessive, interest shall be computed on the excessive amount from the last day of such subsequent taxable year until the date on which the repayment of such excessive amount is received.
(f) Applicable rules. (1) Any interest prescribed by section 6601 shall be assessed and collected in the same manner as tax and shall be paid upon notice and demand by the district director or the director of the regional service center. Any reference in the Code (except in subchapter B, chapter 63, relating to deficiency procedures) to any tax imposed by the Code shall be deemed also to refer to the interest imposed by section 6601 on such tax. Interest on a tax may be assessed and collected at any time within the period of limitation on collection after assessment of the tax to which it relates. For rules relating to the period of limitation on collection after assessment, see section 6502.
(2) No interest under section 6601 shall be payable on any interest provided by such section. This paragraph (f)(2) shall not apply after December 31, 1982, with respect to interest accruing after such date, or accrued but unpaid on such date. See § 301.6622-1.
(3) Interest will not be imposed on any assessable penalty, addition to the tax (other than an addition to tax described in section 6601(e)(2)(B)), or additional amount if the amount is paid within 21 calendar days (10 business days if the amount assessed and shown on the notice and demand equals or exceeds $100,000) from the date of the notice and demand. If interest is imposed, it will be imposed only for the period from the date of the notice and demand to the date on which payment is received. This paragraph (f)(3) is applicable with respect to any notice and demand made after December 31, 1996.
(4) If notice and demand is made after December 31, 1996, for any amount and the amount is paid within 21 calendar days (10 business days if the amount assessed and shown on the notice and demand equals or exceeds $100,000) from the date of the notice and demand, interest will not be imposed for the period after the date of the notice and demand.
(5) For purposes of paragraphs (f)(3) and (4) of this section—
(i) The term business day means any day other than a Saturday, Sunday, legal holiday in the District of Columbia, or a statewide legal holiday in the state where the taxpayer resides or where the taxpayer's principal place of business is located. With respect to the tenth business day (after taking into account the first sentence of this paragraph (f)(5)(i)), see section 7503 relating to time for performance of acts where the last day falls on a statewide legal holiday in the state where the act is required to be performed.
(ii) The term calendar day means any day. With respect to the twenty-first calendar day, see section 7503 relating to time for performance of acts where the last day falls on a Saturday, Sunday, or legal holiday.
(6) No interest shall be imposed for failure to pay estimated tax as required by section 59 of the Internal Revenue Code of 1939 or section 6153 or 6154 of the Internal Revenue Code of 1954.
§ 301.6602-1 - Interest on erroneous refund recoverable by suit.
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 a civil action pursuant to section 7405, shall bear interest at the annual rate referred to in the regulations under section 6621 from the date of the payment of the refund.
§ 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.| Assessed | $1,000 | Correct liability | 900 | Overassessment | 100 | Mar. 15, 1955 | $500 | June 15, 1955 | 500 |
| Original assessment | $50,000 | Deficiency assessment | 10,000 | Total assessed | 60,000 | Correct liability | 35,000 | Overassessment | 25,000 | Mar. 15, 1955 | $25,000 | June 15, 1955 | 25,000 | Nov. 15, 1956 | 5,000 | Nov. 26, 1956 | 5,000 |
| Date | Amount of overpayment | June 15, 1955 | $15,000 | Nov. 15, 1956 | 5,000 | Nov. 26, 1956 | 5,000 |
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(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 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 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.
§ 301.6621-1 - Interest rate.
(a) In general. The interest rate established under section 6621 shall be—
(1) On amounts outstanding before July 1, 1975, 6 percent per annum (or 4 percent in the case of certain extensions of time for payment of taxes as provided in sections 6601 (b) and (j) prior to amendment by section 7(b) of the Act of Jan. 3, 1975 (Pub. L. 93-625, 88 Stat. 2115), and certain overpayments of the unrelated business income tax as provided in section 514(b)(3)(D), prior to its amendment by such Act).
(2) On amounts outstanding—
| After | And before | Rate per annum (percent) | June 30, 1975 | Feb. 1, 1976 | 9 | Jan. 31, 1976 | Feb. 1, 1978 | 7 | Jan. 31, 1978 | Feb. 1, 1980 | 6 | Jan. 31, 1980 | Feb. 1, 1982 | 12 | Jan. 31, 1982 | Jan. 1, 1983 | 20 |
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(3) On amounts outstanding after December 31, 1982, the adjusted rate established by the Commissioner under section 6621(b). This adjusted rate shall be published by the Commissioner in a Revenue Ruling. See § 301.6622-1 for application of daily compounding in determining interest accruing after December 31, 1982. Because interest accruing after December 31, 1982, accrues at the prescribed rate per annum compounded daily, the effective annual percentage rate of interest will exceed the prescribed rate of interest.
(b) [Reserved]
(c) Applicability of interest rate—(1) Computation. Interest and additions to tax on any amount outstanding on a specific day shall be computed at the annual rate applicable on such day.
(2) Additions to tax. Additions to tax under any section of the Code that refers to the annual rate established under this section, including sections 644(a)(2)(B), 4497(c)(2), 6654(a), and 6655 (a) and (g), shall be computed at the same rate per annum as the interest rate set forth under paragraph (a) of this section.
(3) Interest. Interest provided for under any section of the Code that refers to the annual rate established under this section, including sections 47(d)(3)(G), 167(q), 6332(c)(1), 6343(c), 6601(a), 6602, 6611(a), 7426(g), and section 1961(c)(1) or 2411 of title 28 of the United States Code, shall be computed at the rate per annum set forth under paragraph (a) of this section.
(d) Examples. The provisions of this section may be illustrated by the following examples. Example 6 illustrates the computation of interest for interest accuring after December 31, 1982.
Example 1.A, an individual, files an income tax return for the calendar year 1974 on April 15, 1975, showing a tax due of $1,000. A pays the $1,000 on September 1, 1975. Pursuant to section 6601(a), interest on the underpayment of $1,000 is computed at the rate of 6 percent per annum from April 15, 1975, to June 30, 1975, a total of 76 days. Interest for 63 days, from June 30, 1975, to September 1, 1975, shall be computed at the rate of 9 percent per annum. Example 2.An executor of an estate is granted, in accordance with section 6161(a)(2)(A), a two-year extension of time for payment of the estate tax shown on the estate tax return, which tax was otherwise due on January 15, 1974. The tax is paid on January 15, 1976. Interest on the underpayment shall be computed at the rate of 4 percent per annum from January 15, 1974, to June 30, 1975, and at the rate of 9 percent per annum from June 30, 1975, to January 15, 1976. Example 3.X, a corporation, files its 1973 corporate income tax return on March 15, 1974, and pays the balance of tax due shown thereon. On August 1, 1975, an assessment of a deficiency is made against X with respect to such tax. The deficiency is paid on October 1, 1975. Interest at the rate of 6 percent per annum is due on the deficiency from March 15, 1974, the due date of the return, to June 30, 1975, and at the rate of 9 percent per annum from June 30, 1975, to October 1, 1975. Example 4.Y, an individual, files an amended individual income tax return on October 1, 1975, for the refund of an overpayment of income tax Y made on April 15, 1975. Interest is allowed on the overpayment to December 1, 1975. Pursuant to section 6611(a), interest is computed at the rate of 6 percent per annum from April 15, 1975, the date of overpayment, to June 30, 1975. Interest from June 30, 1975, to December 1, 1975, shall be computed at the rate of 9 percent per annum. Example 5.A, an individual, is liable for an addition to tax under section 6654 for the underpayment of estimated tax from April 15, 1975 until January 15, 1976. The addition to tax shall be computed at the annual rate of 6 percent per annum from April 15, 1975, to June 30, 1975, and at the annual rate of 9 percent per annum from June 30, 1975, to January 15, 1976. Example 6.B, an individual, files an income tax return for calendar year 1980 on April 15, 1981, showing a tax due of $1,000. B pays the $1,000 on March 1, 1983. Under section 6601 (a), interest on the $1,000 underpayment is due from April 15, 1981, to March 1, 1983. Such interest is computed at the rate of 12 percent per annum, simple interest from April 15, 1981, to January 31, 1982, and at the rate of 20 percent per annum, simple interest from January 31, 1982, to December 31, 1982, and at the rate of 16 percent per annum, compounded daily, from December 31, 1982, to March 1, 1983. The total simple interest accrued but unpaid at the end of December 31, 1982, is combined with the $1,000 underpayment for purposes of determining the amount of daily compounded interest to be charged from December 31, 1982, to March 1, 1983.§ 301.6621-2T - Questions and answers relating to the increased rate of interest on substantial underpayments attributable to certain tax motivated transactions (temporary).
The following questions and answers relate to the increased rate of interest on substantial underpayments attributable to certain tax motivated transactions as provided in section 6621(d) of the Internal Revenue Code of 1954, as added by section 144 of the Tax Reform Act of 1984 (Pub. L. 98-369, 98 Stat. 682):
Q-1. What is the annual interest rate under section 6621 for purposes of computing the amount of interest that must be paid under section 6601 (relating to interest on underpayments)?
A-1. In general, the annual interest rate for purposes of section 6601 is the adjusted rate of interest established under section 6621 (b) § 301.6621-1 (“adjusted rate”). If, however, a tax motivated underpayment (as defined in A-2 of this section) for a taxable year is substantial (as defined in A-7 of this section), section 6621(d) provides that the annual rate of interest with respect to the tax motivated underpayment is 120 percent of the adjusted rate (“120 percent rate”), rounded to the nearest tenth of a percent.
Q-2. What is a tax motivated underpayment?
A-2. A tax motivated underpayment is the portion of a deficiency (as defined in section 6211) of tax imposed by subtitle A (income taxes) that is attributable to any of the following tax motivated transactions:
(1) Any instance in which the value of any property, or the adjusted basis of any property, claimed on a return is 150 percent or more of the amount determined to be the correct amount of such valuation or adjusted basis (i.e., a valuation overstatement within the meaning of section 6659(c)(1));
(2) Any loss disallowed for any period by reason of section 465(a) or any amount included in gross income by reason of section 465(e);
(3) Any credit disallowed for any period by reason of section 46(c)(8) or section 48(d)(6);
(4) Any loss disallowed for any period with respect to a straddle, as defined in section 1092(c), but without regard to sections 1092 (d) and (e);
(5) Any use of an accounting method that may result in a substantial distortion of income for any period (see A-3 of this section); and
(6) Any deduction disallowed with respect to any other tax motivated transactions (see A-4 of this section).
Q-3. What accounting methods may result in a substantial distortion of income for any period under A-2(5) of this section?
A-3. A deduction or credit disallowed, or income included, in any of the circumstances listed below shall be treated as attributable to the use of an accounting method that may result in a substantial distortion of income and shall thus be a tax motivated transaction that results in a tax motivated underpayment:
(1) Any deduction disallowed for any period by reason of section 464 or section 278(b), relating to certain expenses of farming syndicates;
(2) In the case of a taxpayer who computes taxable income using the cash receipts and disbursements method of accounting, any interest deduction disallowed for any period by reason of section 461(g), relating to prepaid interest, provided the interest is not paid with respect to indebtedness incurred in connection with (i) the purchase, refinancing, or improvement of the principal residence of the taxpayer, or (ii) the purchase of consumer goods by the taxpayer;
(3) Any interest deduction disallowed for any period because the amount of the claimed deduction was computed using a method resulting in an amount of interest for a period that exceeds the true cost of the indebtedness for the period computed by applying the effective rate of interest on the loan to the unpaid balance of the loan for the period (i.e., the economic accrual of interest for the period), provided the interest is not accrued with respect to indebtedness incurred in connection with (i) the purchase, refinancing, or improvement of the principal residence of the taxpayer, or (ii) the purchase of consumer goods by the taxpayer (see Rev. Rul. 83-84, 1983-1 C.B. 97, and sections 163(e), 446(b), and 483);
(4) Any deduction disallowed for any period under section 709, relating to organization or syndication expenditures of a partnership;
(5) In the case of any expenditure described in section 248(b) that was incurred by an S corporation, any deduction disallowed because it exceeds the amount allowable under section 248, relating to organizational expenditures;
(6) Any deduction disallowed for any period under section 267(a), relating to transactions between related taxpayers;
(7) Any deduction disallowed for any period, or any income required to be included for any period, under section 467, relating to certain payments for the use of property or services;
(8) Any deduction disallowed for any period under section 461(i), relating to certain deductions of tax shelters; and
(9) In the case of a taxpayer who computes taxable income using the cash receipts and disbursements method of accounting, any deduction disallowed for any period because (i) the expenditure resulting in the deduction was a deposit rather than a payment, (ii) the expenditure was prepaid for tax avoidance purposes and not for a business purpose, or (iii) the deduction resulted in a material distortion of income (see, e.g., Rev. Rul. 79-229, 1979-2 C.B. 210).
Q-4. Are any transaction other than those specified in A-2 of this section and those involving the use of accounting methods under circumstances specified in A-3 of this section considered tax motivated transactions under A-2(6) of this section?
A-4. Yes. Deductions disallowed under the following provisions are considered to be attributable to tax motivated transactions:
(1) Any deduction disallowed for any period under section 183, relatiing to an activity engaged in by an individual or an S corporation that is not engaged in for profit, and
(2) Any deduction disallowed for any period under section 165(c)(2), relating to any transaction not entered into for profit.
Q-5. How is the amount of a tax motivated underpayment determined?
A-5. Except as provided in A-6 of this section, the amount of a tax motivated underpayment is determined in the following manner:
(1) Calculate the amount of the tax liability for the taxable year as if all items of income, gain, loss, deduction, or credit, had been reported properly on the income tax return of the taxpayer (“total tax liability”); and
(2) Without taking into account any adjustments to items of income, gain, loss, deduction, or credit that are attributable to tax motivated transactions (as defined in A-2 through A-4 of this section), calculate the amount of the tax liability for the taxable year as if all other items of income, gain loss, deduction, or credit had been reported properly on the income tax return of the taxpayer (“tax liability without regard to tax motivated transactions”).
(3) The difference between the total tax liability and the tax liability without regard to tax motivated transactions is the amount of the tax motivated underpayment.
Example.Taxpayer A, a calendar year taxpayer, files his 1984 income tax return reporting $70,000 of taxable income and $23,171 of tax liability. On January 20, 1986, A enters into a closing agreement with the Internal Revenue Service that includes the following adjustments;| Section 162 deduction disallowed (not tax motivated) | $7,500 | Loss disallowed under section 465 (tax motivated—see A-2(2) of this section) | 5,000 | Section 170 deduction disallowed because of a valuation overstatement (tax motivated—see A-2(1) of this section) | 10,000 | Loss disallowed with respect to a straddle as defined in section 1092(c) (tax motivated—see A-2(4) of this section) | 7,000 | Other adjustments (none of which are tax motivated) | 4,000 |
| 1. Reported taxable income | 70,000 | (Add all adjustments to items of income, gain, loss, deduction, or credit (including tax motivated transactions subject to section 6621(d))) | + 33,500 | Tax = $39,685 (“total tax liability”) | 103,500 | 2. Reported taxable income | 70,000 | (Add adjustments to items of income, gain, loss, deduction, or credit other than those with respect to items that are tax motivated) | + 11,500 | Tax = $28,691 (“tax liability without regard to tax motivated transactions”) | 81,500 |
The remainder of the underpayment (i.e., the underpayment not attributable to tax motivated transactions) is $5,520 ($28,691 (tax liability without regard to tax motivated items)−$23,171 (tax paid with return)). The interest on $5,520 would be computed at the adjusted rate.
Q-6: How are the amounts of the tax motivated underpayment and the underpayment attributable to fraud or negligence determined if all or a portion of the taxpayer's underpayment is attributable to one or more tax motivated transactions and all or a portion is subject to the addition to tax imposed by section 6653(a)(2) (in the case of an underpayment attributable to negligence or intentional disregard) or section 6653(b)(2) (in the case of an underpayment attributable to fraud)?
A-6: If all or a portion of the taxpayer's underpayment is attributable to tax motivated transactions, and all or a portion is attributable to fraudulent or negligent items (i.e., items that result in an underpayment subject to the addition to tax imposed by section 6653 (a)(2) or (b)(2)), the amount of the tax motivated underpayment and the underpayment attributable to fraud or negligence is determined in the following manner:
(1) Determine the following amounts;
(i) The tax liability for the taxable year of the taxpayer as if all items of income, gain, loss, deduction, or credit had been reported properly on the income tax return of the taxpayer (“total tax liability”);
(ii) The tax liability for the taxable year of the taxpayer as if all items of income, gain, loss, deduction, or credit without taking into account adjustments to items of income, gain, loss, deduction, or credit that are both (a) attributable to tax motivated transactions and (b) subject to section 6653(a)(2) or section 6653(b)(2), had been reported properly on the income tax return of the taxpayer (“tax liability without regard to fraudulent or negligent tax motivated items”);
(iii) The tax liability for the taxable year of the taxpayer as if all items of income, gain, loss, deduction, or credit, without taking into account adjustments to items of income, gain, loss, deduction, or credit that are subject to section 6653(a)(2) or section 6653(b)(2), had been reported properly on the income tax return of the taxpayer (“tax liability without regard to fraudulent or negligent items”);
(iv) The tax liability for the taxable year of the taxpayer as if all items of income, gain, loss, deduction, or credit, without taking into account adjustments to items of income, gain, loss, deduction, or credit that are either subject to section 6653(a)(2) or section 6653(b)(2) or attributable to tax motivated transactions, had been reported properly on the income tax return of the taxpayer (“tax liability without regard to tax motivated or fraudulent or negligent items”).
(2) The tax motivated underpayment attributable to fraudulent or negligent items is the excess of the total tax liability over the tax liability determined without regard to fraudulent or negligent tax motivated items ((i)-(ii)).
(3) The tax motivated underpayment is the sum of (a) the tax motivated underpayment attributable to fraudulent or negligent items ((i)-(ii)) plus (b) the excess of the tax liability without regard to fraudulent or negligent items over the tax liability without regard to tax motivated or fraudulent or negligent items ((iii)-(iv)). Interest on this underpayment is computed at the 120 percent rate.
(4) The underpayment attributable to fraudulent or negligent items is the excess of the total tax liability over the tax liability without regard to fraudulent or negligent items ((i)-(iii)). The section 6653 addition to tax is 50 percent of the interest on this underpayment computed at the 120 percent rate on an amount equal to the tax motivated underpayment attributable to fraudulent or negligent items (computed in (2)) and at the adjusted rate on the remainder.
Example.Taxpayer A, a calendar year taxpayer, files his 1984 income tax return reporting $70,000 of taxable income and $23,171 of tax liability. On January 20, 1986, A enters into a closing agreement with the Internal Revenue Service that includes the following adjustments:| Section 162 deduction disallowed (not tax motivated but fraudulent or negligent) | $7,500 | Loss disallowed under section 465(a) (tax motivated—see A-2(2) of this section—and fraudulent or negligent) | 5,000 | Section 170 deduction disallowed because of a valuation overstatement (tax motivated—see A-2(1) of this section—but not fraudulent or negligent | 10,000 | Loss disallowed with respect to a straddle as defined in section 1092(c) (tax motivated—see A-2(4) of this section but not fraudulent or negligent) | 7,000 | Other adjustments (none of which are tax motivated or fraudulent or negligent) | 4,000 |
| (1)(i) Reported taxable income | $70,000 | (Add all adjustment | + 33,500 | Tax = $39,685 (“total tax liability”) | 103,500 | (ii) Reported taxable income | 70,000 | All adjustments other than those with respect to items that are both tax motivated and fraudulent or negligent | + 28,500 | Tax = $37,185 (“tax liability without regard to fraudulent or negligent, tax motivated items”) | 98,500 | (iii) Reported taxable income | 70,000 | (All adjustments other than those with respect to items that are fraudulent or negligent) | + 21,000 | Tax = $33,435 (“tax liability without regard fraudulent or negligent items”) | 91,000 | (iv) Reported taxable income | 70,000 | (All adjustments other than those with respect to items that are either tax motivated or fraudulent or negligent) | + 4,000 | Tax = $25,091 (“tax liability without regard to tax motivated or fraudulent or negligent items”) | 74,000 |
(2) The tax motivated underpayment attributable to fraudulent or negligent items is $2,500 ((i))-(ii) or $39,685−$37,185).
(3) The tax motivated underpayment is $10,844 ((2) + ((iii)-(iv)) or $2,500 + ($33,435−$25,091)). Interest on $10,844 is computed at the 120 percent rate.
(4) The underpayment attributable to fraudulent or negligent items is $6,250 ((i)-(iii) or $39,685−$33,435). The section 6653 addition to tax is 50 percent of the interest on $6,250, computed at the 120 percent rate on an amount equal to the tax motivated underpayment attributable to fraudulent or negligent items ($2,500) and at the adjusted rate on the remainder ($3,750).
(5) In summary, therefore, the total underpayment is $16,514 (total tax liability ($39,685) less reported tax liability ($23,171)) of which $10,844 accrues interest at the 120 percent rate and $5,670 ($16,514−$10,844) accrues interest at the adjusted rate. In addition, $6,250 of the underpayment is subject to the section 6653(a)(2) or section 6653(b)(2) addition to tax. The underlying interest, upon which the addition to tax is based, is computed using the 120 percent rate for the portion of the underpayment subject to section 6621(d) ($2,500) and the adjusted rate for the portion that is not subject to section 6621(d) ($3,750).
Q-7. Does the 120 percent rate apply to all tax motivated underpayments?
A-7. No. The 120 percent rate applies only if the tax motivated underpayment for the taxable year is substantial. A tax motivated underpayment is substantial only if it exceeds $1,000. If, for example, a taxpayer has a $600 underpayment attributable to a valuation overstatement (within the meaning of section 6659(c)(1)) and a $500 underpayment attributable to a loss disallowed under section 465(a), the amount of the tax motivated underpayment is $1,100. Because the amount of the tax motivated underpayment is thus substantial the 120 percent rate applies.
Q-8. How do carryovers affect the amount of the tax motivated underpayment and the amount of the underpayment attributable to fraudulent or negligent items?
A-8. For purposes of A-5 and A-6 of this section, a net operating loss carryover, capital loss carryover, or credit carryover is treated as a deduction or credit in the year in which taken into account. In any computation of tax liability required under A-5 or A-6 of this section (i.e., total tax liability, tax liability without regard to tax motivated transactions, etc.), the amount of such deduction or credit is the amount of the carryover determined as if the taxpayer had properly reported in each taxable year all items of income, gain, loss, deduction, or credit affecting the amount of the carryover other than adjustments of a type not taken into account in such computation of tax liability. A net operating loss carryback, capital loss carryback, or credit carryback is not taken into account, however, in determining the amount of the tax motivated underpayment or the amount of the underpayment attributable to fraud or negligence for periods before the last date prescribed for filing the income tax return for the taxable year in which the carryback arises (determined without regard to extensions).
Q-9. What amount is subject to the 120 percent rate if the amount of a taxpayer's unpaid tax for a year is less than the taxpayer's substantial tax motivated underpayment?
A-9. The 120 percent rate applies with respect to the lesser of—
(1) The amount of unpaid tax for the taxable year determined in accordance with § 301.6601-1; or
(2) The substantial tax motivated underpayment for the taxable year.
Q-10. What is the effective date for the 120 percent rate?
A-10. The 120 percent rate applies to interest accruing on a deficiency attributable to a substantial tax motivated underpayment after December 31, 1984, including interest accruing with respect to transactions described in A-3 and A-4 of this section, regardless of the date prescribed for payment of the tax.
Example.Taxpayer A files his income tax return on April 15, 1983 (the last date prescribed for payment of tax for taxable year 1982 under section 6601). In January 1985, Taxpayer A files a petition in the Tax Court in response to a statutory notice of deficiency for taxable year 1982, which includes a tax motivated underpayment of $10,000. In September 1986, the Tax Court enters a decision for the Internal Revenue Service. Under section 6601, interest accrues at the adjusted rate, compounded daily, on tax motivated underpayments outstanding before January 1, 1985, and at the 120 percent rate, compounded daily, on amounts outstanding after December 31, 1984. The underpayment that is subject to the 120 percent rate includes both the $10,000 tax motivated underpayment and the interest that accrued on the underpayment at the adjusted rate from April 16, 1983, through December 31, 1984.Q-11. Can a taxpayer stop the running of interest on a tax motivated underpayment by application of a remittance?
A-11. Yes. The running of interest on a tax liability stops on the date the remittance (either a payment of tax or a deposit in the nature of a cash bond) is received by the Internal Revenue Service, regardless of when the liability is assessed or the remittance is actually applied against the taxpayer's account. A taxpayer must make a remittance for both the tax liability and the interest that has accrued as of the date of remittance to stop the running of interest on both the tax liability and the accrued interest with respect to the liability. (See Rev. Proc. 84-58.) Taxpayer cannot make partial remittances applicable only to tax motivated underpayments. Under A-9 of this section, the 120 percent rate applies to the amount of unpaid tax to the extent that amount does not exceed the tax motivated underpayment. Therefore, a partial remittance is applied first to any tax due that is not attributable to a tax motivated underpayment. The excess of the partial remittance over tax that is not attributable to a tax motivated underpayment, if any, will then be applied to tax due that is attributable to a tax motivated underpayment.
Q-12. Does the 120 percent rate apply to interest accruing on interest, penalties, additional amounts, or additions to tax as provided in section 6601(e)(2)?
A-12. The 120 percent rate applies only to taxes imposed by subtitle A (income taxes) and to interest accrued with respect to such taxes. The penalties, additional amounts, and additions to tax specified in section 6601(e)(2) are not imposed by subtitle A and are not, therefore, included in the amount of a tax motivated underpayment. They are, however, included in the amount of unpaid tax for purposes of A-9 of this section.
Example.Taxpayer A, for taxable year 1984, has a $10,000 tax motivated underpayment and a $2,000 addition to tax for a total unpaid tax of $12,000. If A makes a $5,000 payment of tax, he will still have a $10,000 tax motivated underpayment but will now have only $7,000 of unpaid tax. Pursuant to A-9 of this section, therefore, the 120 percent rate would apply to the $7,000 of unpaid tax.§ 301.6621-3 - Higher interest rate payable on large corporate underpayments.
(a) In general. Section 6621 establishes the interest rate for purposes of computing the amount of interest that must be paid under section 6601, relating to interest on underpayments of tax. Section 6621(a)(2) provides that the underpayment rate is the sum of the Federal short-term rate (determined under section 6621(b)) plus 3 percentage points. That underpayment rate is referred to hereinafter as the “section 6621(a)(2) rate.” Section 6621(c) and this section, however, provide that the underpayment rate on any large corporate underpayment is the sum of the Federal short-term rate (determined under section 6621(b)) plus 5 percentage points. This higher underpayment rate is referred to hereinafter as the “section 6621(c) rate.” The section 6621(c) rate applies only for periods after the applicable date (as determined in paragraph (c) of this section).
(b) Large corporate underpayment—(1) Defined. For purposes of section 6621(c) and this section, “large corporate underpayment” means any underpayment of a tax by a C corporation for any taxable period if the amount of the threshold underpayment of the tax (as defined in paragraph (b)(2)(ii) of this section) for that taxable period exceeds $100,000.
(2) Underpayment of a tax—(i) In general. As used in section 6621(c) and this section, “underpayment of a tax” means the excess of a tax imposed by the Internal Revenue Code over the amount of such tax paid on or before the last date prescribed for payment. Except as provided in paragraph (b)(2)(ii) of this section, “tax” for such purposes includes interest, penalties, additional amounts, and additions to tax. See sections 6601(e)(1), 6665(a), and 6671(a). Thus, the section 6621(c) rate generally applies to any interest, penalties, additional amounts, and additions to tax, as well as to the underlying tax with respect to which such amounts are imposed.
(ii) Threshold underpayment of a tax. Solely for purposes of this section and not for any other purpose under section 6621(c) or elsewhere in the interpretation or administration of the federal tax laws, a “threshold underpayment of a tax” is the excess of a tax imposed by the Internal Revenue Code (exclusive of interest, penalties, additional amounts, and additions to tax) for the taxable period over the amount of such tax paid on or before the last date prescribed for payment. Thus, any payments made after the last date prescribed for payment (for example, by way of an amended return) will not affect the existence of a threshold underpayment. In determining whether there is a threshold underpayment, different types of taxes (such as income tax and FICA tax) and amounts that relate to different taxable periods are not added together.
(iii) When determined—(A) In general. The existence of a threshold underpayment of a tax and the amount of a large corporate underpayment are generally determined only when an assessment is made with respect to the taxable period. Thus, the amount of a deficiency or proposed deficiency set forth in a letter or notice pursuant to which the applicable date is determined (under paragraph (c) of this section) does not determine whether there is a large corporate underpayment.
(B) Judicial determinations. Notwithstanding any prior assessment made with respect to a taxable period, the section 6621(c) rate does not apply if, after a federal court determines the taxpayer's liability for a period, the threshold underpayment for that taxable period does not exceed $100,000. See Example 3 in paragraph (d) of this section.
(iv) Special rule. The section 6621(c) rate is not used to compute the interest charges that a taxpayer timely assesses against itself in return for using a method of tax accounting or reporting that defers the payment of tax, such as the interest charges relating to passive foreign investment companies under section 1291(c) and installment obligations of nondealers under section 453A(c). However, to the extent such charges are not paid on or before the last date prescribed for payment and therefore become part of an underpayment of a tax, the section 6621(c) rate will apply to such amounts for periods after the applicable date (as determined in paragraph (c) of this section).
(3) C corporation defined. For purposes of section 6621(c)(3)(A) and this section, “C corporation” means, with respect to any taxable period, a corporation that is a C corporation during any part of the taxable period. Interest on a large corporate underpayment for a taxable period continues to be imposed at the section 6621(c) rate even if during or after the taxable period—
(i) The taxpayer ceases to be a C corporation; or
(ii) The underpayment becomes the liability of a successor or transferee that is not a C corporation.
(4) Taxable period. For purposes of section 6621(c) and this section, the “taxable period” is the taxable year in the case of any tax imposed by subtitle A of the Internal Revenue Code. In the case of any other tax, the “taxable period” is the period to which the underpayment relates. For example, the taxable period for an underpayment of FICA taxes is the calendar quarter. If the underpayment does not relate to a particular period (for example, in the case of certain transactional excise taxes), the “taxable period” is the period covered by a return on which the tax is required to be shown.
(5) Last date prescribed for payment. For purposes of this section, the “last date prescribed for payment” means the last date prescribed for payment as determined, without regard to any extension of time, under section 6601(b).
(c) Applicable date—(1) In general. The section 6621(c) rate applies only to periods after the applicable date. Pursuant to the effective date of section 6621(c) and paragraph (e) of this section, however, the section 6621(c) rate will not apply prior to January 1, 1991, even if the applicable date is prior to December 31, 1990. A letter or notice relating to a particular type of tax creates an applicable date only for that type of tax. For example, a letter or notice with respect to FUTA tax will not create an applicable date with respect to income tax for the same taxable year.
(2) When deficiency procedures apply. The applicable date, in the case of any underpayment of a tax to which the deficiency procedures of subchapter B of chapter 63 of the Internal Revenue Code apply, is the 30th day after the earlier of—
(i) The date on which the Service sends the taxpayer the first letter of proposed deficiency that allows the taxpayer an opportunity for administrative review in the Service's Office of Appeals (commonly called a “30-day letter”); or
(ii) The date on which the Service sends a deficiency notice under section 6212 of the Internal Revenue Code (commonly called a “90-day letter”).
(3) When deficiency procedures do not apply. The applicable date, in the case of any underpayment of a tax to which the deficiency procedures do not apply, is the 30th day after the date on which the Service sends the first letter or notice that notifies the taxpayer of an assessment or proposed assessment of the tax. In the case of income taxes, for example, the deficiency procedures do not apply to amounts shown as due on the taxpayer's return if the taxpayer fails to remit the full amount on or before the last date prescribed for payment, and to amounts attributable to mathematical or clerical errors on a return (unless a request for abatement is filed by the taxpayer under section 6213(b)). Because no 30-day letter or 90-day letter is issued to the taxpayer in such cases, the applicable date is the 30th day after the date on which an assessment notice under section 6303 of the Internal Revenue Code is sent.
(4) Partnership items. For purposes of section 6621(c) and this paragraph (c), 60-day letters and the notices described in sections 6223(a)(1) and 6223(a)(2) (relating to administrative proceedings at the partnership level) are not treated as letters of proposed deficiency that allow the taxpayer an opportunity for administrative review in the Service's Office of Appeals, deficiency notices under section 6212 of the Internal Revenue Code, or letters or notices that notify the taxpayer of an assessment or proposed assessment of the tax. Thus, in the absence of any other letter or notice described in paragraph (c)(2) or (c)(3) of this section that establishes an earlier applicable date, the applicable date in the case of any underpayment of a tax attributable, in whole or in part, to a partnership item (as defined in section 6231(a)(3)) is the 30th day after the date on which the Service sends the first letter or notice that notifies the taxpayer of an assessment of the tax.
(5) Exception of payment of amount shown as due—(i) In general. A letter of notice will be disregarded for purposes of determining the applicable date if the taxpayer makes a payment equal to the amount shown as due in the letter or notice within 30 days from the date that the Service sends the letter or notice.
(ii) Special transition rule. A letter or notice sent by the Service prior to January 1, 1991, will be disregarded by the Service for purposes of determining the applicable date if the taxpayer makes a payment on or before January 31, 1991, equal to the amount shown as due in the letter or notice plus a reasonable estimate of the interest payable on such amount computed by applying the section 6621(a)(2) rate. If the taxpayer has received two or more letters or notices with respect to the same tax for the same taxable period and pays the amount shown as due in the last letter or notice sent prior to December 19, 1990, (plus a reasonable estimate of the interest), all of the prior letters and notices with respect to the same tax for the same taxable period will be disregarded under this paragraph (c)(5)(ii). In the case of an assessment notice, the payment of the amount of interest shown as due on the last assessment notice sent to the taxpayer prior to December 19, 1990, will be treated as a payment of a reasonable estimate of the interest payable on the amount shown in that assessment notice or in any prior assessment notice sent with respect to the same tax for the same taxable period. The special transition rule in this paragraph (c)(5)(ii) applies even if the payment is not made within 30 days of the date on which the Service sent the letter or notice.
(iii) Amount shown as due. For purposes of section 6621(c)(2)(B)(ii) and this paragraph (c)(5), the “amount shown as due” in any letter or notice means the total amount of tax, as well as any interest, penalties, additional amounts, and additions to tax that are set forth in the letter or notice. A deposit in the nature of a cash bond will not be considered a payment of the amount shown as due.
(6) Exception for withdrawn letters and notices—(i) Letters of proposed deficiency. A letter of proposed deficiency will be disregarded for purposes of determining the applicable date if the letter of proposed deficiency is issued as a result of an administrative error either to the wrong taxpayer or for the wrong taxable period.
(ii) Deficiency notices. A deficiency notice under section 6212 of the Internal Revenue Code will be disregarded for purposes of determining the applicable date if the deficiency notice is rescinded under section 6212(d).
(iii) Assessment letters and notices. A letter or notice that notifies the taxpayer of an assessment or proposed assessment of tax will be disregarded for purposes of determining the applicable date if the full amount of tax assessed is subsequently abated.
(d) Examples. The application of this section may be illustrated by the following examples.
Example 1.V, a C corporation, timely files Form 941 on January 31, 1991, for the fourth quarter of 1990. On September 1, 1992, the Service sends V a section 6303 notice and demand reflecting an additional FICA tax liability for that quarter of $90,000. Interest computed at the section 6621(a)(2) rate totals $15,000 as of September 1, 1992. Accordingly, V's underpayment of FICA tax for the fourth quarter of 1990 exceeds $100,000. However, V's $90,000 threshold underpayment of FICA tax for that taxable period is less than $100,000, so that the section 6621(c) rate will not apply to the underpayment for that taxable period. Example 2.(i) W, a C corporation, timely files its 1990 income tax return on March 15, 1991, showing a liability of $95,000, of which W pays only $35,000 with the return. On June 1, 1991, the Service sends W an assessment notice reflecting the balance due of $60,000 plus interest computed at the section 6621(a)(2) rate. W pays all amounts due on August 1, 1991. On July 1, 1993, the Service sends W a 90-day letter (without having sent a 30-day letter) reflecting an additional income tax deficiency of $85,000 for the taxable year 1990. W files a petition in the Tax Court within 90 days. In 1995, the Tax Court determines a $50,000 income tax deficiency (exclusive of interest, penalties, additional amounts, and additions to tax) for 1990, which the Service promptly assesses against W.(ii) As a result of the combination of the failure to timely pay the $60,000 of income tax reported as due on the return and the Tax Court's determination of an additional deficiency of $50,000, W's threshold underpayment of income tax for 1990 is $110,000. Because W is a C corporation and the threshold underpayment for 1990 exceeds $100,000, the section 6621(c) rate applies to W's 1990 large corporate underpayment for periods after the applicable date.
(iii) The applicable date is July 1, 1991, the 30th day after the date on which the Service sent W the first assessment notice.
(iv) From March 16, 1991, through July 1, 1991, interest on W's 1990 underpayment of income tax (including any interest, penalties, additional amounts, and additions to tax) is computed at the section 6621(a)(2) rate. From July 2, 1991, such interest is computed at the section 6621(c) rate.
(v) If W had paid the amount shown as due on the June 1, 1991, assessment notice on or before June 30, 1991, instead of on August 1, 1991, the applicable date would have been July 31, 1993.
(vi) Assume that W had paid the amount shown as due on the June 1, 1991, assessment notice on or before June 30, 1991. If W had made a $40,000 deposit in the nature of a cash bond on July 15, 1993, the applicable date would be July 31, 1993. Moreover, the deposit would have no effect on the existence or amount of W's threshold underpayment or large corporate underpayment for 1990. In such a case, however, when the Service assesses the amount due from W in 1995, the deposit would be treated as a payment made as of July 15, 1993, for purposes of computing interest due after that date. As a result, interest would accrue after July 15, 1993, (at the section 6621(c) rate) only on the portion of W's 1990 underpayment that exceeds the $40,000 deposit amount.
Example 3.(i) X, a C corporation, filed its 1989 income tax return ,on September 17, 1990, pursuant to an automatic extension. X enclosed payment of the $7,500 balance reported on the return as due (plus interest). On January 1, 1992, the Service sends X a written notification that X's 1989 income tax return is being examined. This written notification also contains a request that X provide supplemental information with respect to particular deductions totalling $1.5 million. On July 1, 1993, the Service sends X a 30-day letter proposing a $450,000 deficiency (without any reference to penalties, additional amounts, additions to tax, and interest) with respect to 1989. On December 15, 1993, the Service sends X a 90-day letter asserting a deficiency of $300,000 (excluding penalties, additional amounts, additions to tax, and other interest). X does not file a Tax Court petition and the Service assesses the $300,000 (plus interest and penalties) on April 1, 1994. On April 5, 1994, X pays the full amount assessed. Thereafter, X timely files an administrative claim for refund and a refund suit in federal district court for the amounts assessed on April 1, 1994. On September 30, 1995, the federal district court determines that, exclusive of interest and penalties, X overpaid its 1989 income tax by $250,000.(ii) The April 1, 1994, assessment establishes at that time that X's threshold underpayment of income tax for 1989 is $300,000. Because X is a C corporation and the threshold underpayment for 1989 exceeds $100,000, X's underpayment of income tax for 1989 is a large corporate underpayment to which the section 6621(c) rate applies for periods after the applicable date. X's decision to file a refund claim does not affect, in and of itself, either the existence of a threshold underpayment or the amount of X's large corporate underpayment.
(iii) For purposes of determining the amount of interest to assess on April 1, 1994, the applicable date is July 31, 1993, the 30th day after the date on which the Service sent X a 30-day letter. The January 1, 1992, notice of examination and request for additional information has no effect on the applicable date. Similarly, the September 30, 1995, federal district court decision has no effect on the applicable date.
(iv) From March 16, 1990, through July 31, 1993, interest on X's 1989 underpayment of income tax (including any interest, penalties, additional amounts, and additions to tax) is computed at the section 6621(a)(2) rate. From August 1, 1993, through April 5, 1994, such interest is computed at the section 6621(c) rate.
(v) Because of the federal district court's decision that X's underpayment, exclusive of interest and penalties, was only $50,000, X does not have a large corporate underpayment of income tax for 1989. Thus, the interest X paid with respect to the remaining $250,000 in taxes (exclusive of interest and penalties) becomes part of the overpayment and will be refunded. In addition, any interest computed at the section 6621(c) rate for the period from August 1, 1993, through April 5, 1994, should be recomputed at the section 6621(a)(2) rate and the difference refunded.
Example 4.(i) Y, a C corporation, timely filed its 1989 income tax return on March 15, 1990, and enclosed payment of the amount reported on the return as due. On May 1, 1990, the Service sent to Y an assessment notice for $1,000 resulting from a math error on Y's return. Y did not request an abatement of the assessment pursuant to section 6213(b). Instead, Y paid the $1,000, plus interest, on July 31, 1990. On March 31, 1992, the Service sends Y a 90-day letter showing an income tax deficiency for 1989 of $125,000 (exclusive of interest, penalties, additional amounts, and additions to tax). No 30-day letter had been issued previously to Y in connection with its 1989 taxable year. Y does not file a petition with the Tax Court, but files an amended return for 1989 on April 15, 1992, showing $30,000 of tax due. Y pays this amount (plus interest from March 15, 1990, computed at the section 6621(a)(2) rate) with the amended return. Shortly thereafter, the Service assesses the $125,000 deficiency (plus interest) and credits the April 15, 1992, payment against the assessment.(ii) Y's threshold underpayment for 1989 is $125,000 notwithstanding Y's April 15, 1992, payment of $30,000. Because Y is a C corporation and the threshold underpayment for 1989 exceeds $100,000, Y has a large corporate underpayment of income tax for the taxable period 1989 to which the section 6621(c) rate applies for periods after the applicable date.
(iii) Because Y paid the $1,000 amount shown as due on the math error assessment notice (plus interest) on or before January 31, 1991, the applicable date is April 30, 1992, the 30th day after the 90-day letter is sent.
(iv) From March 16, 1990, through April 30, 1992, interest is computed on Y's underpayment of income tax (including any interest, penalties, additional amounts, and additions to tax) at the section 6621(a)(2) rate. From May 1, 1992, such interest is computed at the section 6621(c) rate.
(v) If Y had not paid the $1,000 amount shown as due on the math error assessment notice (plus interest) on or before January 31, 1991, the applicable date would have been May 31, 1990, and interest would be computed at the section 6621(c) rate beginning on January 1, 1991. If, however, Y had timely requested an abatement of the assessment under section 6213(b), the applicable date would be April 30, 1992.
Example 5.(i) Effective January 1, 1993, Y converts from a C corporation to an S corporation. On January 31, 1993 Y files its 1992 FUTA tax return and encloses a payment equal to the amount reported as due on the return. On March 15, 1993, Y files its 1992 income tax return and encloses a payment equal to the amount reported as due on the return. On August 1, 1993, the Service sends to Y an assessment notice for $150,000 of FUTA tax, plus interest, with respect to calendar year 1992. Y pays the full amount shown as due in the assessment notice on August 7, 1993. On January 1, 1995, Y files an amended income tax return for 1992 showing $15,000 of tax due. Y pays this amount with the amended return. On February 10, 1995, the Service sends Y an assessment notice for the interest payable on the $15,000. Y pays this interest on February 13, 1995.(ii) Y's threshold underpayment of FUTA tax for 1992 is $150,000. Because Y was a C corporation in 1992 and the threshold underpayment of FUTA tax for 1992 exceeds $100,000, Y has a large corporate underpayment of FUTA tax. However, Y's threshold underpayment of income tax for the same taxable period (i.e., calendar 1992) is $15,000, so that Y does not have a large corporate underpayment of income tax for that year.
(iii) Because Y pays within 30 days the amount shown as due on the August 1, 1993, assessment notice, there is no applicable date with respect to the large corporate underpayment of FUTA tax for 1992.
(iv) All of the interest payable with respect to the 1992 underpayments of FUTA and income taxes is computed at the section 6621(a)(2) rate.
(v) If Y had not paid the amount shown as due on the August 1, 1993, FUTA tax assessment notice within 30 days, the applicable date would have been August 31, 1993, (the 30th day after the assessment notice is sent). Thus, interest would have been computed at the section 6621(c) rate after that date, even though Y is not at that time a C corporation.
(vi) If the amended 1992 income tax return Y files on January 1, 1995, had shown $115,000 of tax due instead of $15,000, Y's threshold underpayment of income tax for 1992 would have been $115,000. Because Y was a C corporation in 1992 and the threshold underpayment of income tax for that year would have exceeded $100,000, Y would have a large corporate underpayment of income tax for that year. However, because Y would have paid the amount shown as due in the February 10, 1995, assessment notice within 30 days of when that assessment notice was sent, there would have been no applicable date with respect to that large corporate underpayment and the section 6621(c) rate would have not applied.
Example 6.(i) On August 1, 1990, the Service sent to Z, a C corporation, an assessment notice for $200,000 of income tax, plus $30,000 in interest and penalties, with respect to calendar year 1988. Subsequent assessment notices were sent to Z on September 12, 1990, October 10, 1990, and November 14, 1990, each including additional interest. The November 14, 1990, assessment notice provided that the total amount of tax, interest and penalties due was $242,000. On December 31, 1990, Z pays $230,000. On February 13, 1991, the Service sends Z an assessment notice for the remaining balance (plus additional interest thereon). On December 31, 1991, Z pays all amounts owed as of that date in connection with its 1988 income tax liability.(ii) Z's threshold underpayment of income tax for 1988 is $200,000. Because Z is a C corporation and its threshold underpayment of income tax for 1988 exceeds $100,000, Z has a large corporate underpayment for 1988 to which the section 6621(c) rate applies for periods after the applicable date.
(iii) Notwithstanding Z's payment of $230,000 on December 31, 1990, the applicable date with respect to the large corporate underpayment of 1988 income tax is August 31, 1990, the 30th day after the date on which the Service sent the first assessment notice.
(iv) From March 16, 1989, to December 31, 1990, interest is computed on Z's underpayment of income tax (including any interest, penalties, additional amounts and additions to tax) at the section 6621(a)(2) rate. From January 1, 1991, through December 31, 1991, interest is computed on that underpayment at the section 6621(c) rate.
(v) If Z had paid on or before January 31, 1991, the full $242,000 shown as due on the November 14, 1990, assessment notice, the applicable date with respect to any remaining unpaid interest would have been March 15, 1991, the 30th day after the Service sent the February 13, 1991, assessment notice.
(vi) The same result as in paragraph (v) of this Example 6 would apply if the November 14, 1990, assessment notice had provided that only $150,000 was due with respect to calendar year 1988 (as a result of a correction by the Service of an error in its original August 1, 1990, assessment, and not as a result of any payment by Z), and if Z had paid that $150,000 on or before January 31, 1991.
(e) Effective date. Section 6621(c) and this section are effective for determining interest for periods after December 31, 1990, regardless of the taxable period to which the underlying tax may relate and even if the applicable date is prior to December 31, 1990.
§ 301.6622-1 - Interest compounded daily.
(a) General rule. Effective for interest accruing after December 31, 1982, in computing the amount of any interest required to be paid under the Internal Revenue Code of 1954 or sections 1961(c)(1) or 2411 of title 28, United States Code, by the Commissioner or by the taxpayer, or in computing any other amount determined by reference to such amount of interest, or by reference to the interest rate established under section 6621, such interest or such other amount shall be compounded daily by dividing such rate of interest by 365 (366 in a leap year) and compounding such daily interest rate each day.
(b) Exception. Paragraph (a) of this section shall not apply for purposes of determining the amount of any addition to tax under sections 6654 or 6655 (relating to failure to pay estimated income tax).
(c) Applicability to unpaid amounts on December 31, 1982—(1) In general. The unpaid interest (or other amount) that shall be compounded daily includes the interest (or other amount) accrued but unpaid on December 31, 1982.
(2) Illustration. The provisions of this (c) may be illustrated by the following example.
Example.Individual A files a tax return for calendar year 1981 on April 15, 1982, showing a tax due of $10,000. A pays $10,000 on December 31, 1982, but A does not pay any interest with respect to this underpayment until March 1, 1983, on which date A paid all amounts of interest with respect to the $10,000 underpayment of tax. On December 31, 1982, A's unsatisfied interest liability was $1,424.66 ($10,000 × 20 percent × 260/365 days). Interest, compounded daily, accrues on this unsatisfied interest obligation beginning on January 1, 1983, until March 1, 1983, the date the total interest obligation is satisfied. On March 1, 1983, the total interest obligation is $1,462.62, computed as follows:| Item | Amount | Unpaid tax at December 31, 1982 | 0 | Unpaid interest at December 31, 1982 | $1,424.66 | Total unsatisfied obligation at December 31, 1982 | 1,424.66 | Interest from December 31, 1982, to March 1, 1983, at 16 percent per year compounded daily | 37.96 | Total due, March 1, 1983 | 1,462.62 |
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