Part I. Rulings and Decisions Under the Internal Revenue Code of 1986

Section 6103.—Confi- dentiality and Disclosure of Returns and Return Information

26 CFR 301.6103(n)–2: Disclosure of return infor- mation in connection with written contracts among the IRS, whistleblowers, and legal representatives of whistleblowers.

T.D. 9516

DEPARTMENT OF THE TREASURY Internal Revenue Service 26 CFR Part 301

Disclosure of Return Information in Connection with Written Contracts Among the IRS, Whistleblowers, and Legal Representatives of Whistleblowers

AGENCY: Internal Revenue Service (IRS), Treasury.

ACTION: Final regulations and removal of temporary regulations.

SUMMARY: This document contains final regulations relating to the disclosure of return information by an officer or employee of the Treasury Department, to a whistleblower and, if applicable, the legal representative of the whistleblower, to the extent necessary in connection with a written contract among the IRS, the whistleblower and, if applicable, the legal representative of the whistleblower, for services relating to the detection of violations of the internal revenue laws or related statutes. The final regulations will affect officers and employees of the Treasury Department who disclose return information to whistleblowers or their legal representatives in connection with written contracts among the IRS, whistleblowers and, if applicable, their legal representatives, for services relating to the detection of violations of the internal revenue laws or related statutes. The final regulations will also affect any whistleblower or legal representative of a whistleblower who

receives return information in connection with a written contract among the IRS, the whistleblower and, if applicable, the legal representative of the whistleblower, for services relating to the detection of violations of the internal revenue laws or related statutes.

DATES: Effective Date: These final regulations are effective on March 15, 2011.

Applicability Date: For dates of applicability, see §301.6103(n)–2(f).

FOR FURTHER INFORMATION CONTACT: Helene R. Newsome, 202–622–7950 (not a toll-free number).

SUPPLEMENTARY INFORMATION:

Background

This document contains final regulations implementing amendments to the Procedure and Administration Regulations (26 CFR part 301) under section 6103(n) relating to the disclosure of return information in connection with written contracts among the IRS, whistleblowers and, if applicable, their legal representatives.

The Tax Relief and Health Care Act of 2006, Public Law 109–432 (120 Stat. 2958), (the Act) was enacted on December 20, 2006. Section 406 of the Act amends section 7623, concerning the payment of awards to whistleblowers, and establishes a Whistleblower Office within the IRS that has responsibility for the administration of a whistleblower program. In connection with analyzing information provided by a whistleblower, or investigating a matter, the IRS may determine that it requires the assistance of the whistleblower, or the legal representative of the whistleblower. The Joint Committee on Taxation (the JCT) has noted that “[t]o the extent the disclosure of returns or return information is required [for the whistleblower or his or her legal representative] to render such assistance, the disclosure must be pursuant to an IRS tax administration contract.” Joint Committee on Taxation, Technical Explanation of H.R. 6408, The “Tax Relief and Health Care Act of

2006,” as Introduced in the House on December 7, 2006, at 89 (JCX–50–06), December 7, 2006. The JCT has further noted that “[i]t is expected that such disclosures will be infrequent and will be made only when the assigned task cannot be properly or timely completed without the return information to be disclosed.” Id.

Under section 6103(a), returns and return information are confidential unless the Internal Revenue Code authorizes disclosure. Section 6103(n) is the authority by which returns and return information may be disclosed pursuant to a tax administration contract. Section 6103(n) authorizes, pursuant to regulations prescribed by the Secretary, returns and return information to be disclosed to any person, for purposes of tax administration, to the extent necessary in connection with: (1) the processing, storage, transmission, and reproduction of returns and return information; (2) the programming, maintenance, repair, testing, and procurement of equipment; and (3) the providing of other services.

On March 25, 2008, temporary regulations (T.D. 9389, 2008–1 C.B. 863) under section 6103(n) were published in the Federal Register (73 FR 15668) describing the circumstances under which officers and employees of the Treasury Department may disclose return information to whistleblowers and, if applicable, their legal representatives, in connection with written contracts for services relating to the detection of violations of the internal revenue laws or related statutes. A notice of proposed rulemaking (REG–114942–07, 2008–1 C.B. 901) cross-referencing the temporary regulations was published in the Federal Regis- ter for the same day (73 FR 15687).

One written comment responding to the notice of proposed rulemaking was received. No public hearing was requested or held. After consideration of the comment, the regulations are adopted as proposed with only minor technical changes made.

The limitations applicable to section 6103(n) contracts as outlined in these regulations are not a limitation on the use of return information that may be disclosed

2011–13 I.R.B. 575 March 28, 2011

§301.6103(n)–2 Disclosure of return information in connection with written contracts among the IRS, whistleblowers, and legal representatives of whistleblowers .

(a) General rule . (1) Pursuant to the provisions of sections 6103(n) and 7623 of the Internal Revenue Code and subject to the conditions of this section, an officer or employee of the Treasury Department is authorized to disclose return information (as defined in section 6103(b)(2)) to a whistleblower and, if applicable, the legal representative of the whistleblower, to the extent necessary in connection with a written contract among the Internal Revenue Service (IRS), the whistleblower and, if applicable, the legal representative of the whistleblower, for services relating to the detection of violations of the internal revenue laws or related statutes.

(2) The IRS shall have the discretion to determine whether to enter into a written contract pursuant to section 7623 with the whistleblower and, if applicable, the legal representative of the whistleblower, for services described in paragraph (a)(1) of this section.

(b) Limitations . (1) Disclosure of return information in connection with a written contract for services described in paragraph (a)(1) of this section shall be made only to the extent the IRS deems it necessary in connection with the reasonable or proper performance of the contract. Disclosures may include, but are not limited to, disclosures to accomplish properly any purpose or activity of the nature described in section 6103(k)(6) and the regulations thereunder.

(2) If the IRS determines that the services of a whistleblower and, if applicable, the legal representative of the whistleblower, as described in paragraph (a)(1) of this section, can be performed reasonably or properly by disclosure of only parts or portions of return information, then only the parts or portions of the return information shall be disclosed.

(3) Upon written request by a whistleblower, or a legal representative of a whistleblower, with whom the IRS has entered into a written contract for services as described in paragraph (a)(1) of this section, the Director of the Whistleblower Office, or designee of the Director, may inform the whistleblower and, if ap

to a whistleblower or the legal representative of a whistleblower during an award determination administrative proceeding and in an award determination appeal to the U.S. Tax Court.

Summary of Comment

The commentator recommended that §301.6103(n)–2(b)(3) of the proposed regulations be revised to eliminate any requirement that a written contract be in place for a whistleblower to be provided with basic status information about the whistleblower’s claim for award under section 7623. The commentator drew a comparison with whistleblower claims under the False Claims Act and argued that the standard for the IRS to share status information with a whistleblower should not be the same as that required to share information from the actual returns of taxpayers. Unlike other statutory schemes, however, information regarding the status of a whistleblower’s claim with the IRS is “return information” as defined in section 6103(b)(2). Like returns (defined in section 6103(b)(1)), return information is confidential under section 6103(a) and may only be disclosed if authorized by a specific provision of the Code. In order to disclose status information to a whistleblower, an exception to section 6103 must be applicable. Section 6103(n) provides authority for the IRS to make status information disclosures to a whistleblower. Because disclosures pursuant to section 6103(n) require a written tax administration contract, the final regulations do not adopt the commentator’s recommendation.

The commentator also recommended that §301.6103(n)–2(d)(3) of the proposed regulations be revised to eliminate the inspection requirement. The commentator asserted that, by contrast, §301.6103(n)–1, “Disclosure of returns and return information in connection with written contracts or agreements for the acquisition of property or services for tax administration purposes,” does not include such a requirement and argued that the requirement is unnecessary in that the regulations already provide for severe sanctions for any failure to comply with the terms of written contracts for services. In fact, §301.6103(n)–1(e)(1) does indeed contain an inspection requirement. The final regu

lations retain the inspection requirement as consistent with the longstanding safeguard procedures that incorporate inspection as an integral part of the contracting process under section 6103(n).

Special Analyses

It has been determined that this Treasury decision is not a significant regulatory action as defined in Executive Order 12866. Therefore, a regulatory assessment is not required. It also has been determined that section 553(b) of the Administrative Procedure Act (5 U.S.C. chapter 5) does not apply to these regulations, and because the regulations do not impose a collection of information on small entities, the Regulatory Flexibility Act (5 U.S.C. chapter 6) does not apply. Pursuant to section 7805(f) of the Code, the proposed regulations preceding these regulations were submitted to the Chief Counsel for Advocacy of the Small Business Administration for comment on their impact on small business.

Drafting Information

The principal author of these regulations is Helene R. Newsome, Office of the Associate Chief Counsel (Procedure & Administration).

- - - -

Adoption of Amendments to the Regulations

Accordingly, 26 CFR part 301 is amended as follows:

PART 301—PROCEDURE AND ADMINISTRATION

Paragraph 1. The authority citation for part 301 is amended by adding an entry in numerical order to read as follows:

Authority: 26 U.S.C. 7805 * * * Section 301.6103(n)–2 also issued under 26 U.S.C. 6103(n). - * *

Section 301.6103(n)–2 also issued under 26 U.S.C. 6103(q). - * *

Par. 2. Section 301.6103(n)–2 is added to read as follows:

March 28, 2011 576 2011–13 I.R.B.

Michael F. Mundaca, Assistant Secretary of the Treasury for Tax Policy.

(Filed by the Office of the Federal Register on March 14, 2011, 8:45 a.m., and published in the issue of the Federal Register for March 15, 2011, 76 F.R. 13880)

Section 6621.—Determina- tion of Rate of Interest

26 CFR 301.6621–1: Interest rate.

Interest rates; underpayments and overpayments. The rates for interest determined under section 6621 of the Code for the calendar quarter beginning April 1, 2011, will be 4 percent for overpayments (3 percent in the case of a corporation), 4 percent for underpayments, and 6 percent for large corporate underpayments. The rate of interest paid on the portion of a corporate overpayment exceeding $10,000 will be 1.5 percent.

Rev. Rul. 2011–5

Section 6621 of the Internal Revenue Code establishes the rates for interest on tax overpayments and tax underpayments. Under section 6621(a)(1), the overpayment rate is the sum of the federal short-term rate plus 3 percentage points (2 percentage points in the case of a corporation), except the rate for the portion of a corporate overpayment of tax exceeding $10,000 for a taxable period is the sum of the federal short-term rate plus 0.5 of a percentage point. Under section 6621(a)(2), the underpayment rate is the sum of the federal short-term rate plus 3 percentage points.

Section 6621(c) provides that for purposes of interest payable under section 6601 on any large corporate underpayment, the underpayment rate under section 6621(a)(2) is determined by substituting “5 percentage points” for “3 percentage points.” See section 6621(c) and section 301.6621–3 of the Regulations on Procedure and Administration for the definition of a large corporate underpayment and for the rules for determining the applicable date. Section 6621(c) and section 301.6621–3 are generally effective for periods after December 31, 1990.

Section 6621(b)(1) provides that the Secretary will determine the federal

plicable, the legal representative of the whistleblower, of the status of the whistleblower’s claim for award under section 7623, including whether the claim is being evaluated for potential investigative action, or is pending due to an ongoing examination, appeal, collection action, or litigation. The information may be disclosed only if the IRS determines that the disclosure would not seriously impair Federal tax administration.

(4) Return information disclosed to a whistleblower and, if applicable, a legal representative of a whistleblower, under this section, shall not be further disclosed or otherwise used by the whistleblower or a legal representative of a whistleblower, except as expressly authorized in writing by the IRS.

(c) Penalties . Any whistleblower, or legal representative of a whistleblower, who receives return information under this section, is subject to the civil and criminal penalty provisions of sections 7431, 7213, and 7213A for the unauthorized inspection or disclosure of the return information.

(d) Safeguards . (1) Any whistleblower, or the legal representative of a whistleblower, who receives return information under this section, shall comply with all applicable conditions and requirements as the IRS may prescribe from time to time for the purposes of protecting the confidentiality of the return information and preventing any disclosure or inspection of the return information in a manner not authorized by this section (prescribed requirements).

(2) Any written contract for services as described in paragraph (a)(1) of this section shall provide that any whistleblower and, if applicable, the legal representative of a whistleblower, who has access to return information under this section, shall comply with the prescribed requirements.

(3) Any whistleblower, or the legal representative of a whistleblower, who may receive return information under this section, shall agree in writing, before any disclosure of return information is made, to permit an inspection of the whistleblower’s or the legal representative’s premises by the IRS relative to the maintenance of the return information disclosed under these regulations and, upon completion of services as described in the written contract with the IRS, to dispose

of all return information by returning the return information, including any and all copies or notes made, to the IRS, or to the extent that it cannot be returned, by destroying the information in a manner consistent with prescribed requirements.

(4) If the IRS determines that any whistleblower, or the legal representative of a whistleblower, who has access to return information under this section, has failed to, or does not, satisfy the prescribed requirements, the IRS, using the procedures described in the regulations under section 6103(p)(7), may take any action it deems necessary to ensure that the prescribed requirements are or will be satisfied, including—

(i) Suspension of further disclosures of return information by the IRS to the whistleblower and, if applicable, the legal representative of the whistleblower, until the IRS determines that the conditions and requirements have been or will be satisfied; and

(ii) Suspension or termination of any duty or obligation arising under the contract with the IRS.

(e) Definitions . For purposes of this section—

(1) The term Treasury Department includes the IRS and the Office of the Chief Counsel for the IRS.

(2) The term whistleblower means an individual who provides information to the IRS regarding violations of the tax laws or related statutes and submits a claim for an award under section 7623 with respect to the information.

(3) The term legal representative means any individual who is a member in good standing in the bar of the highest court of any state, possession, territory, commonwealth, or the District of Columbia, and who has a written power of attorney executed by the whistleblower.

(f) Effective/applicability date . This section is applicable on March 15, 2011.

Par. 3. Section 301.6103(n)–2T is removed.

§301.6103(n)–2T [Removed].

Steven T. Miller, Deputy Commissioner for Services and Enforcement.

Approved March 9, 2011.

2011–13 I.R.B. 577 March 28, 2011

derpayments for the first calendar quarter in 2011 and for the first 15 days in April 2011. Interest factors for daily compound interest for annual rates of 1.5 percent, 3 percent, 4 percent and 6 percent are published in Tables 8, 11, 13, and 17 of Rev. Proc. 95–17, 1995–1 C.B. 556, 562, 567, and 571. Interest factors for daily compound interest for an annual rate of 0.5 percent are published in Appendix A of Revenue Ruling 2010–31, 2010–52 I.R.B. 898, 899.

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

DRAFTING INFORMATION

The principal author of this revenue ruling is Deborah Colbert-James of the Office of Associate Chief Counsel (Procedure & Administration). For further information regarding this revenue ruling, contact Ms. Colbert-James at (202) 622–8143 (not a toll-free call).

short-term rate for the first month in each calendar quarter. Section 6621(b)(2)(A) provides that the federal short-term rate determined under section 6621(b)(1) for any month applies during the first calendar quarter beginning after that month. Section 6621(b)(2)(B) provides that in determining the addition to tax under section 6654 for failure to pay estimated tax for any taxable year, the federal short-term rate that applies during the third month following the taxable year also applies during the first 15 days of the fourth month following the taxable year. Section 6621(b)(3) provides that the federal short-term rate for any month is the federal short-term rate determined during that 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 is 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, 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.

The federal short-term rate determined in accordance with section 1274(d) during January 2011 is the rate published in Revenue Ruling 2011–4, 2011–6 I.R.B. 448 to take effect beginning February 1, 2011. The federal short-term rate, rounded to the nearest full percent, based on daily compounding determined during the month of January 2011 is 1 percent. Accordingly, an overpayment rate of 4 percent (3 percent in the case of a corporation) and an underpayment rate of 4 percent are established for the calendar quarter beginning April 1, 2011. The overpayment rate for the portion of a corporate overpayment exceeding $10,000 for the calendar quarter beginning April 1, 2011, is 1.5 percent. The underpayment rate for large corporate underpayments for the calendar quarter beginning April 1, 2011, is 6 percent. These rates apply to amounts bearing interest during that calendar quarter.

Under section 6621(b)(2)(B), the 4 percent rate also applies to estimated tax un

March 28, 2011 578 2011–13 I.R.B.

APPENDIX A

365 Day Year

0.5% Compound Rate 184 Days

Days Factor Days Factor Days Factor

1 0.000013699 63 0.000863380 125 0.001713784 2 0.000027397 64 0.000877091 126 0.001727506 3 0.000041096 65 0.000890801 127 0.001741228 4 0.000054796 66 0.000904512 128 0.001754951 5 0.000068495 67 0.000918223 129 0.001768673 6 0.000082195 68 0.000931934 130 0.001782396 7 0.000095894 69 0.000945646 131 0.001796119 8 0.000109594 70 0.000959357 132 0.001809843 9 0.000123294 71 0.000973069 133 0.001823566 10 0.000136995 72 0.000986781 134 0.001837290 11 0.000150695 73 0.001000493 135 0.001851013 12 0.000164396 74 0.001014206 136 0.001864737 13 0.000178097 75 0.001027918 137 0.001878462 14 0.000191798 76 0.001041631 138 0.001892186 15 0.000205499 77 0.001055344 139 0.001905910 16 0.000219201 78 0.001069057 140 0.001919635 17 0.000232902 79 0.001082770 141 0.001933360 18 0.000246604 80 0.001096484 142 0.001947085 19 0.000260306 81 0.001110197 143 0.001960811 20 0.000274008 82 0.001123911 144 0.001974536 21 0.000287711 83 0.001137625 145 0.001988262 22 0.000301413 84 0.001151339 146 0.002001988 23 0.000315116 85 0.001165054 147 0.002015714 24 0.000328819 86 0.001178768 148 0.002029440 25 0.000342522 87 0.001192483 149 0.002043166 26 0.000356225 88 0.001206198 150 0.002056893 27 0.000369929 89 0.001219913 151 0.002070620 28 0.000383633 90 0.001233629 152 0.002084347 29 0.000397336 91 0.001247344 153 0.002098074 30 0.000411041 92 0.001261060 154 0.002111801 31 0.000424745 93 0.001274776 155 0.002125529 32 0.000438449 94 0.001288492 156 0.002139257 33 0.000452154 95 0.001302208 157 0.002152985 34 0.000465859 96 0.001315925 158 0.002166713 35 0.000479564 97 0.001329641 159 0.002180441 36 0.000493269 98 0.001343358 160 0.002194169 37 0.000506974 99 0.001357075 161 0.002207898 38 0.000520680 100 0.001370792 162 0.002221627 39 0.000534386 101 0.001384510 163 0.002235356 40 0.000548092 102 0.001398227 164 0.002249085 41 0.000561798 103 0.001411945 165 0.002262815 42 0.000575504 104 0.001425663 166 0.002276544 43 0.000589211 105 0.001439381 167 0.002290274 44 0.000602917 106 0.001453100 168 0.002304004 45 0.000616624 107 0.001466818 169 0.002317734 46 0.000630331 108 0.001480537 170 0.002331465 47 0.000644039 109 0.001494256 171 0.002345195 48 0.000657746 110 0.001507975 172 0.002358926 49 0.000671454 111 0.001521694 173 0.002372657 50 0.000685161 112 0.001535414 174 0.002386388 51 0.000698869 113 0.001549133 175 0.002400120 52 0.000712578 114 0.001562853 176 0.002413851 53 0.000726286 115 0.001576573 177 0.002427583 54 0.000739995 116 0.001590293 178 0.002441315 55 0.000753703 117 0.001604014 179 0.002455047 56 0.000767412 118 0.001617734 180 0.002468779

2011–13 I.R.B. 579 March 28, 2011

365 Day Year

0.5% Compound Rate 184 Days

Days Factor Days Factor Days Factor

57 0.000781121 119 0.001631455 181 0.002482511 58 0.000794831 120 0.001645176 182 0.002496244 59 0.000808540 121 0.001658897 183 0.002509977 60 0.000822250 122 0.001672619 184 0.002523710 61 0.000835960 123 0.001686340 62 0.000849670 124 0.001700062

366 Day Year

0.5% Compound Rate 184 Days

Days Factor Days Factor Days Factor

1 0.000013661 63 0.000861020 125 0.001709097 2 0.000027323 64 0.000874693 126 0.001722782 3 0.000040984 65 0.000888366 127 0.001736467 4 0.000054646 66 0.000902040 128 0.001750152 5 0.000068308 67 0.000915713 129 0.001763837 6 0.000081970 68 0.000929387 130 0.001777522 7 0.000095632 69 0.000943061 131 0.001791208 8 0.000109295 70 0.000956735 132 0.001804893 9 0.000122958 71 0.000970409 133 0.001818579 10 0.000136620 72 0.000984084 134 0.001832265 11 0.000150283 73 0.000997758 135 0.001845951 12 0.000163947 74 0.001011433 136 0.001859638 13 0.000177610 75 0.001025108 137 0.001873324 14 0.000191274 76 0.001038783 138 0.001887011 15 0.000204938 77 0.001052459 139 0.001900698 16 0.000218602 78 0.001066134 140 0.001914385 17 0.000232266 79 0.001079810 141 0.001928073 18 0.000245930 80 0.001093486 142 0.001941760 19 0.000259595 81 0.001107162 143 0.001955448 20 0.000273260 82 0.001120839 144 0.001969136 21 0.000286924 83 0.001134515 145 0.001982824 22 0.000300590 84 0.001148192 146 0.001996512 23 0.000314255 85 0.001161869 147 0.002010201 24 0.000327920 86 0.001175546 148 0.002023889 25 0.000341586 87 0.001189223 149 0.002037578 26 0.000355252 88 0.001202900 150 0.002051267 27 0.000368918 89 0.001216578 151 0.002064957 28 0.000382584 90 0.001230256 152 0.002078646 29 0.000396251 91 0.001243934 153 0.002092336 30 0.000409917 92 0.001257612 154 0.002106025 31 0.000423584 93 0.001271291 155 0.002119715 32 0.000437251 94 0.001284969 156 0.002133405 33 0.000450918 95 0.001298648 157 0.002147096 34 0.000464586 96 0.001312327 158 0.002160786 35 0.000478253 97 0.001326006 159 0.002174477 36 0.000491921 98 0.001339685 160 0.002188168 37 0.000505589 99 0.001353365 161 0.002201859 38 0.000519257 100 0.001367044 162 0.002215550 39 0.000532925 101 0.001380724 163 0.002229242 40 0.000546594 102 0.001394404 164 0.002242933 41 0.000560262 103 0.001408085 165 0.002256625 42 0.000573931 104 0.001421765 166 0.002270317 43 0.000587600 105 0.001435446 167 0.002284010 44 0.000601269 106 0.001449127 168 0.002297702 45 0.000614939 107 0.001462808 169 0.002311395

March 28, 2011 580 2011–13 I.R.B.

366 Day Year

0.5% Compound Rate 184 Days

Days Factor Days Factor Days Factor

46 0.000628608 108 0.001476489 170 0.002325087 47 0.000642278 109 0.001490170 171 0.002338780 48 0.000655948 110 0.001503852 172 0.002352473 49 0.000669618 111 0.001517533 173 0.002366167 50 0.000683289 112 0.001531215 174 0.002379860 51 0.000696959 113 0.001544897 175 0.002393554 52 0.000710630 114 0.001558580 176 0.002407248 53 0.000724301 115 0.001572262 177 0.002420942 54 0.000737972 116 0.001585945 178 0.002434636 55 0.000751643 117 0.001599628 179 0.002448331 56 0.000765315 118 0.001613311 180 0.002462025 57 0.000778986 119 0.001626994 181 0.002475720 58 0.000792658 120 0.001640678 182 0.002489415 59 0.000806330 121 0.001654361 183 0.002503110 60 0.000820003 122 0.001668045 184 0.002516806 61 0.000833675 123 0.001681729 62 0.000847348 124 0.001695413

TABLE OF INTEREST RATES

PERIODS BEFORE JUL. 1, 1975 - PERIODS ENDING DEC. 31, 1986

OVERPAYMENTS AND UNDERPAYMENTS

PERIOD RATE

In 1995–1 C.B. DAILY RATE TABLE

Before Jul. 1, 1975 6% Table 2, pg. 557 Jul. 1, 1975—Jan. 31, 1976 9% Table 4, pg. 559 Feb. 1, 1976—Jan. 31, 1978 7% Table 3, pg. 558 Feb. 1, 1978—Jan. 31, 1980 6% Table 2, pg. 557 Feb. 1, 1980—Jan. 31, 1982 12% Table 5, pg. 560 Feb. 1, 1982—Dec. 31, 1982 20% Table 6, pg. 560 Jan. 1, 1983—Jun. 30, 1983 16% Table 37, pg. 591 Jul. 1, 1983—Dec. 31, 1983 11% Table 27, pg. 581 Jan. 1, 1984—Jun. 30, 1984 11% Table 75, pg. 629 Jul. 1, 1984—Dec. 31, 1984 11% Table 75, pg. 629 Jan. 1, 1985—Jun. 30, 1985 13% Table 31, pg. 585 Jul. 1, 1985—Dec. 31, 1985 11% Table 27, pg. 581 Jan. 1, 1986—Jun. 30, 1986 10% Table 25, pg. 579 Jul. 1, 1986—Dec. 31, 1986 9% Table 23, pg. 577

2011–13 I.R.B. 581 March 28, 2011

TABLE OF INTEREST RATES

FROM JANUARY 1, 1999 - PRESENT

NONCORPORATE OVERPAYMENTS AND UNDERPAYMENTS

1995–1 C.B. RATE TABLE PG

Jan. 1, 1999—Mar. 31, 1999 7% 19 573 Apr. 1, 1999—Jun. 30, 1999 8% 21 575 Jul. 1, 1999—Sep. 30, 1999 8% 21 575 Oct. 1, 1999—Dec. 31, 1999 8% 21 575 Jan. 1, 2000—Mar. 31, 2000 8% 69 623 Apr. 1, 2000—Jun. 30, 2000 9% 71 625

March 28, 2011 582 2011–13 I.R.B.

TABLE OF INTEREST RATES

FROM JANUARY 1, 1999 - PRESENT - Continued

NONCORPORATE OVERPAYMENTS AND UNDERPAYMENTS

1995–1 C.B. RATE TABLE PG

Jul. 1, 2000—Sep. 30, 2000 9% 71 625 Oct. 1, 2000—Dec. 31, 2000 9% 71 625 Jan. 1, 2001—Mar. 31, 2001 9% 23 577 Apr. 1, 2001—Jun. 30, 2001 8% 21 575 Jul. 1, 2001—Sep. 30, 2001 7% 19 573 Oct. 1, 2001—Dec. 31, 2001 7% 19 573 Jan. 1, 2002—Mar. 31, 2002 6% 17 571 Apr. 1, 2002—Jun. 30, 2002 6% 17 571 Jul. 1, 2002—Sep. 30, 2002 6% 17 571 Oct. 1, 2002—Dec. 31, 2002 6% 17 571 Jan. 1, 2003—Mar. 31, 2003 5% 15 569 Apr. 1, 2003—Jun. 30, 2003 5% 15 569 Jul. 1, 2003—Sep. 30, 2003 5% 15 569 Oct. 1, 2003—Dec. 31, 2003 4% 13 567 Jan. 1, 2004—Mar. 31, 2004 4% 61 615 Apr. 1, 2004—Jun. 30, 2004 5% 63 617 Jul. 1, 2004—Sep. 30, 2004 4% 61 615 Oct. 1, 2004—Dec. 31, 2004 5% 63 617 Jan. 1, 2005—Mar. 31, 2005 5% 15 569 Apr. 1, 2005—Jun. 30, 2005 6% 17 571 Jul. 1, 2005—Sep. 30, 2005 6% 17 571 Oct. 1, 2005—Dec. 31, 2005 7% 19 573 Jan. 1, 2006—Mar. 31, 2006 7% 19 573 Apr. 1, 2006—Jun. 30, 2006 7% 19 573 Jul. 1, 2006—Sep. 30, 2006 8% 21 575 Oct. 1, 2006—Dec. 31, 2006 8% 21 575 Jan. 1, 2007—Mar. 31, 2007 8% 21 575 Apr. 1, 2007—Jun. 30, 2007 8% 21 575 Jul. 1, 2007—Sep. 30, 2007 8% 21 575 Oct. 1, 2007—Dec. 31, 2007 8% 21 575 Jan. 1, 2008—Mar. 31, 2008 7% 67 621 Apr. 1, 2008—Jun. 30, 2008 6% 65 619 Jul. 1, 2008—Sep. 30, 2008 5% 63 617 Oct. 1, 2008—Dec. 31, 2008 6% 65 619 Jan. 1, 2009—Mar. 31, 2009 5% 15 569 Apr. 1, 2009—Jun. 30, 2009 4% 13 567 Jul. 1, 2009—Sep. 30, 2009 4% 13 567 Oct. 1, 2009—Dec. 31, 2009 4% 13 567 Jan. 1, 2010—Mar. 31, 2010 4% 13 567 Apr. 1, 2010—Jun. 30, 2010 4% 13 567 Jul. 1, 2010—Sep. 30, 2010 4% 13 567 Oct. 1, 2010—Dec. 31, 2010 4% 13 567 Jan. 1, 2011—Mar. 31, 2011 3% 11 565 Apr. 1, 2011—June 30, 2011 4% 13 567

2011–13 I.R.B. 583 March 28, 2011

March 28, 2011 584 2011–13 I.R.B.

TABLE OF INTEREST RATES FOR LARGE CORPORATE UNDERPAYMENTS

FROM JANUARY 1, 1991 - PRESENT

1995–1 C.B. RATE TABLE PG

Jan. 1, 1991—Mar. 31, 1991 13% 31 585 Apr. 1, 1991—Jun. 30, 1991 12% 29 583 Jul. 1, 1991—Sep. 30, 1991 12% 29 583 Oct. 1, 1991—Dec. 31, 1991 12% 29 583 Jan. 1, 1992—Mar. 31, 1992 11% 75 629 Apr. 1, 1992—Jun. 30, 1992 10% 73 627 Jul. 1, 1992—Sep. 30, 1992 10% 73 627 Oct. 1, 1992—Dec. 31, 1992 9% 71 625 Jan. 1, 1993—Mar. 31, 1993 9% 23 577 Apr. 1, 1993—Jun. 30, 1993 9% 23 577 Jul. 1, 1993—Sep. 30, 1993 9% 23 577 Oct. 1, 1993—Dec. 31, 1993 9% 23 577 Jan. 1, 1994—Mar. 31, 1994 9% 23 577 Apr. 1, 1994—Jun. 30, 1994 9% 23 577 Jul. 1, 1994—Sep. 30, 1994 10% 25 579 Oct. 1, 1994—Dec. 31, 1994 11% 27 581 Jan. 1, 1995—Mar. 31, 1995 11% 27 581 Apr. 1, 1995—Jun. 30, 1995 12% 29 583 Jul. 1, 1995—Sep. 30, 1995 11% 27 581 Oct. 1, 1995—Dec. 31, 1995 11% 27 581 Jan. 1, 1996—Mar. 31, 1996 11% 75 629 Apr. 1, 1996—Jun. 30, 1996 10% 73 627 Jul. 1, 1996—Sep. 30, 1996 11% 75 629 Oct. 1, 1996—Dec. 31, 1996 11% 75 629 Jan. 1, 1997—Mar. 31, 1997 11% 27 581 Apr. 1, 1997—Jun. 30, 1997 11% 27 581 Jul. 1, 1997—Sep. 30, 1997 11% 27 581 Oct. 1, 1997—Dec. 31, 1997 11% 27 581 Jan. 1, 1998—Mar. 31, 1998 11% 27 581 Apr. 1, 1998—Jun. 30, 1998 10% 25 579 Jul. 1, 1998—Sep. 30, 1998 10% 25 579 Oct. 1, 1998—Dec. 31, 1998 10% 25 579 Jan. 1, 1999—Mar. 31, 1999 9% 23 577 Apr. 1, 1999—Jun. 30, 1999 10% 25 579 Jul. 1, 1999—Sep. 30, 1999 10% 25 579 Oct. 1, 1999—Dec. 31, 1999 10% 25 579 Jan. 1, 2000—Mar. 31, 2000 10% 73 627 Apr. 1, 2000—Jun. 30, 2000 11% 75 629 Jul. 1, 2000—Sep. 30, 2000 11% 75 629 Oct. 1, 2000—Dec. 31, 2000 11% 75 629 Jan. 1, 2001—Mar. 31, 2001 11% 27 581 Apr. 1, 2001—Jun. 30, 2001 10% 25 579 Jul. 1, 2001—Sep. 30, 2001 9% 23 577 Oct. 1, 2001—Dec. 31, 2001 9% 23 577 Jan. 1, 2002—Mar. 31, 2002 8% 21 575 Apr. 1, 2002—Jun. 30, 2002 8% 21 575 Jul. 1, 2002—Sep. 30, 2002 8% 21 575 Oct. 1, 2002—Dec. 30, 2002 8% 21 575 Jan. 1, 2003—Mar. 31, 2003 7% 19 573 Apr. 1, 2003—Jun. 30, 2003 7% 19 573 Jul. 1, 2003—Sep. 30, 2003 7% 19 573 Oct. 1, 2003—Dec. 31, 2003 6% 17 571 Jan. 1, 2004—Mar. 31, 2004 6% 65 619 Apr. 1, 2004—Jun. 30, 2004 7% 67 621 Jul. 1, 2004—Sep. 30, 2004 6% 65 619 Oct. 1, 2004—Dec. 31, 2004 7% 67 621

2011–13 I.R.B. 585 March 28, 2011

TABLE OF INTEREST RATES FOR LARGE CORPORATE UNDERPAYMENTS

FROM JANUARY 1, 1991 - PRESENT - Continued

1995–1 C.B. RATE TABLE PG

Jan. 1, 2005—Mar. 31, 2005 7% 19 573 Apr. 1, 2005—Jun. 30, 2005 8% 21 575 Jul. 1, 2005—Sep. 30, 2005 8% 21 575 Oct. 1, 2005—Dec. 31, 2005 9% 23 577 Jan. 1, 2006—Mar. 31, 2006 9% 23 577 Apr. 1, 2006—Jun. 30, 2006 9% 23 577 Jul. 1, 2006—Sep. 30, 2006 10% 25 579 Oct. 1, 2006—Dec. 31, 2006 10% 25 579 Jan. 1, 2007—Mar. 31, 2007 10% 25 579 Apr. 1, 2007—Jun. 30, 2007 10% 25 579 Jul. 1, 2007—Sep. 30, 2007 10% 25 579 Oct. 1, 2007—Dec. 31, 2007 10% 25 579 Jan. 1, 2008—Mar. 31, 2008 9% 71 625 Apr. 1, 2008—Jun. 30, 2008 8% 69 623 Jul. 1, 2008—Sep. 30, 2008 7% 67 621 Oct. 1, 2008—Dec. 31, 2008 8% 69 623 Jan. 1, 2009—Mar. 31, 2009 7% 19 573 Apr. 1, 2009—Jun. 30, 2009 6% 17 571 Jul. 1, 2009—Sep. 30, 2009 6% 17 571 Oct. 1, 2009—Dec. 31, 2009 6% 17 571 Jan. 1, 2010—Mar. 31, 2010 6% 17 571 Apr. 1, 2010—Jun. 30, 2010 6% 17 571 Jul. 1, 2010—Sep. 30, 2010 6% 17 571 Oct. 1, 2010—Dec. 31, 2010 6% 17 571 Jan. 1, 2011—Mar. 31, 2011 5% 15 569 Apr. 1, 2011—June 30, 2011 6% 17 571

TABLE OF INTEREST RATES FOR CORPORATE

OVERPAYMENTS EXCEEDING $10,000

FROM JANUARY 1, 1995 - PRESENT

1995–1 C.B. RATE TABLE PG

Jan. 1, 1995—Mar. 31, 1995 6.5% 18 572 Apr. 1, 1995—Jun. 30, 1995 7.5% 20 574 Jul. 1, 1995—Sep. 30, 1995 6.5% 18 572 Oct. 1, 1995—Dec. 31, 1995 6.5% 18 572 Jan. 1, 1996—Mar. 31, 1996 6.5% 66 620 Apr. 1, 1996—Jun. 30, 1996 5.5% 64 618 Jul. 1, 1996—Sep. 30, 1996 6.5% 66 620 Oct. 1, 1996—Dec. 31, 1996 6.5% 66 620 Jan. 1, 1997—Mar. 31, 1997 6.5% 18 572 Apr. 1, 1997—Jun. 30, 1997 6.5% 18 572 Jul. 1, 1997—Sep. 30, 1997 6.5% 18 572 Oct. 1, 1997—Dec. 31, 1997 6.5% 18 572 Jan. 1, 1998—Mar. 31, 1998 6.5% 18 572 Apr. 1, 1998—Jun. 30, 1998 5.5% 16 570 Jul. 1, 1998—Sep. 30, 1998 5.5% 16 570 Oct. 1, 1998—Dec. 31, 1998 5.5% 16 570 Jan. 1, 1999—Mar. 31, 1999 4.5% 14 568 Apr. 1, 1999—Jun. 30, 1999 5.5% 16 570 Jul. 1, 1999—Sep. 30, 1999 5.5% 16 570 Oct. 1, 1999—Dec. 31, 1999 5.5% 16 570

March 28, 2011 586 2011–13 I.R.B.

TABLE OF INTEREST RATES FOR CORPORATE

OVERPAYMENTS EXCEEDING $10,000

FROM JANUARY 1, 1995 - PRESENT - Continued

1995–1 C.B. RATE TABLE PG

Jan. 1, 2000—Mar. 31, 2000 5.5% 64 618 Apr. 1, 2000—Jun. 30, 2000 6.5% 66 620 Jul. 1, 2000—Sep. 30, 2000 6.5% 66 620 Oct. 1, 2000—Dec. 31, 2000 6.5% 66 620 Jan. 1, 2001—Mar. 31, 2001 6.5% 18 572 Apr. 1, 2001—Jun. 30, 2001 5.5% 16 570 Jul. 1, 2001—Sep. 30, 2001 4.5% 14 568 Oct. 1, 2001—Dec. 31, 2001 4.5% 14 568 Jan. 1, 2002—Mar. 31, 2002 3.5% 12 566 Apr. 1, 2002—Jun. 30, 2002 3.5% 12 566 Jul. 1, 2002—Sep. 30, 2002 3.5% 12 566 Oct. 1, 2002—Dec. 31, 2002 3.5% 12 566 Jan. 1, 2003—Mar. 31, 2003 2.5% 10 564 Apr. 1, 2003—Jun. 30, 2003 2.5% 10 564 Jul. 1, 2003—Sep. 30, 2003 2.5% 10 564 Oct. 1, 2003—Dec. 31, 2003 1.5% 8 562 Jan. 1, 2004—Mar. 31, 2004 1.5% 56 610 Apr. 1, 2004—Jun. 30, 2004 2.5% 58 612 Jul. 1, 2004—Sep. 30, 2004 1.5% 56 610 Oct. 1, 2004—Dec. 31, 2004 2.5% 58 612 Jan. 1, 2005—Mar. 31, 2005 2.5% 10 564 Apr. 1, 2005—Jun. 30, 2005 3.5% 12 566 Jul. 1, 2005—Sep. 30, 2005 3.5% 12 566 Oct. 1, 2005—Dec. 31, 2005 4.5% 14 568 Jan. 1, 2006—Mar. 31, 2006 4.5% 14 568 Apr. 1, 2006—Jun. 30, 2006 4.5% 14 568 Jul. 1, 2006—Sep. 30, 2006 5.5% 16 570 Oct. 1, 2006—Dec. 31, 2006 5.5% 16 570 Jan. 1, 2007—Mar. 31, 2007 5.5% 16 570 Apr. 1, 2007—Jun. 30, 2007 5.5% 16 570 Jul. 1, 2007—Sep. 30, 2007 5.5% 16 570 Oct. 1, 2007—Dec. 31, 2007 5.5% 16 570 Jan. 1, 2008—Mar. 31, 2008 4.5% 62 616 Apr. 1, 2008—Jun. 30, 2008 3.5% 60 614 Jul. 1, 2008—Sep. 30, 2008 2.5% 58 612 Oct. 1, 2008—Dec. 31, 2008 3.5% 60 614 Jan. 1, 2009—Mar. 31, 2009 2.5% 10 564 Apr. 1, 2009—Jun. 30, 2009 1.5% 8 562 Jul. 1, 2009—Sep. 30, 2009 1.5% 8 562 Oct. 1, 2009—Dec. 31, 2009 1.5% 8 562 Jan. 1, 2010—Mar. 31, 2010 1.5% 8 562 Apr. 1, 2010—Jun. 30, 2010 1.5% 8 562 Jul. 1, 2010—Sep. 30, 2010 1.5% 8 562 Oct. 1, 2010—Dec. 31, 2010 1.5% 8 562 Jan. 1, 2011—Mar. 31, 2011 0.5%* Apr. 1, 2011—June 30, 2011 1.5% 8 562

2011–13 I.R.B. 587 March 28, 2011