TERMS AGREEMENT

                                                                  March 27, 2006



Citigroup Funding Inc.
388 Greenwich Street, 38th Floor
New York, New York 10013
Attn:  Treasury Capital Markets

Ladies and Gentlemen:

      We understand that Citigroup Funding Inc., a Delaware corporation (the
"Company"), proposes to issue and sell $42,000,000 aggregate principal amount of
its Stock Market Upturn Notes(SM) (Notes) Based Upon the S&P 500(R) Index Due
July 12, 2007 (the "Notes"). The payments due under the Notes will be fully and
unconditionally guaranteed by Citigroup Inc., a Delaware corporation (the
"Guarantor"). Subject to the terms and conditions set forth herein or
incorporated by reference herein, Citigroup Global Markets Inc. (the
"Underwriter") offers to purchase 4,200,000 Notes for an amount equal to
$41,370,000 (98.5% of the aggregate principal amount). The Closing Date shall be
March 30, 2006 at 9:00 a.m. at the offices of Cleary Gottlieb Steen & Hamilton
LLP, One Liberty Plaza, New York, New York 10006.

      The Notes shall have the following terms:

<Table>
<Caption>

                                    
Title:                                 Stock Market Upturn Notes(SM) (Notes) Based Upon the S&P 500(R)
                                       Index Due July 12, 2007

Maturity:                              July 12, 2007

Maturity Payment:                      Holders of the Notes will be entitled to receive at maturity
                                       the Maturity Payment (as defined in the Prospectus Supplement
                                       dated March 27, 2006 relating to the Notes)


                                       1


<Table>
<Caption>

                                    
Interest Rate:                         The Notes do not bear interest.  No payments on the Notes
                                       will be made until maturity

Initial Price To Public:               100% of the principal amount thereof, plus accrued interest
                                       from March 30, 2006 to date of payment and delivery

Redemption Provisions:                 The Notes are not redeemable by the Company prior to maturity

Trustee:                               The Bank of New York

Indenture:                             Indenture, dated as of June 1, 2005
</Table>

      All the provisions contained in the document entitled "Citigroup Funding
Inc. - Debt Securities - Underwriting Agreement Basic Provisions" and dated May
3, 2005 (the "Basic Provisions"), a copy of which you have previously received,
are herein incorporated by reference in their entirety and shall be deemed to be
a part of this Terms Agreement to the same extent as if the Basic Provisions had
been set forth in full herein. Terms defined in the Basic Provisions are used
herein as therein defined.

            Basic Provisions varied with respect to this Terms Agreement:

            (a) In Section 1, insert the following:

                  (c) As of 4:00 p.m. on March 27, 2006, the Preliminary Final
            Prospectus dated February 17, 2006, including the documents
            incorporated by reference therein, and the document listed in
            Schedule I hereto, considered together with the amount, the public
            offering price, the delivery date and the maturity date of the
            Securities, each as set forth on the front cover of the Final
            Prospectus, and the starting value of the S&P 500 Index, the maximum
            index return and the upside participation rate, as set forth under
            the heading "Summary Information - - Q&A" in the Final Prospectus
            (except as to the financial statements or other data of a financial
            or statistical nature contained therein), does not contain any
            untrue statement of a material fact or omit to state any material
            fact necessary in order to make the statements therein, in the light
            of the circumstances under which they were made, not misleading.

                  (b) in Section 5, insert the following:

                  (i) Each of the Company and the Guarantor represents and
            agrees that, unless it has obtained or will obtain, as the case may
            be, the prior written


                                       2


            consent of the Representative, and each of the Underwriters,
            severally and not jointly, represents and agrees with the Company
            and the Guarantor that, unless it has obtained or will obtain, as
            the case may be, the prior written consent of the Company and the
            Guarantor, it has not made and will not make any offer relating to
            the Securities that would constitute an issuer free writing
            prospectus as defined in Rule 433 under the Act ("Issuer Free
            Writing Prospectus") or that would otherwise constitute a free
            writing prospectus as defined in Rule 405 under the Act ("Free
            Writing Prospectus") required to be filed by the Company or the
            Guarantor with the Commission or retained by the Company or the
            Guarantor under Rule 433 under the Act; provided that the prior
            written consent of the parties hereto shall be deemed to have been
            given in respect of the Free Writing Prospectus included in Schedule
            I hereto.

      (c) delete the text of Section 6(b) (including subsections (i) through
(x)) and insert in lieu thereof the following:

                  (b) The Company and the Guarantor shall have requested and
            caused the counsel for the Company and the Guarantor to have
            furnished to the Representative an opinion, dated the Closing Date
            and addressed to the Representative, to the effect set forth in
            Annex A hereto.

      (d) in the tenth line of Section 8(a), delete "or the Final Prospectus"
and insert in lieu thereof ", the Final Prospectus or any Issuer Free Writing
Prospectus"

      The Underwriter hereby agrees in connection with the underwriting of the
Notes to comply with the requirements set forth in any applicable sections of
Section 2720 to the By-Laws of the National Association of Securities Dealers,
Inc.

      Michael S. Zuckert, Esq. is General Counsel, Finance and Capital Markets
of the Guarantor and legal counsel to the Company. Cleary Gottlieb Steen &
Hamilton LLP is counsel to the Underwriter. Cleary Gottlieb Steen & Hamilton LLP
is special tax counsel to the Company and the Guarantor.

      Please accept this offer no later than 9:00 p.m. on March 27, 2006, by
signing a copy of this Terms Agreement in the space set forth below and
returning the signed copy to us, or by sending us a written acceptance in the
following form:


                                       3


      "We hereby accept your offer, set forth in the Terms Agreement, dated
March 27, 2006, to purchase the Notes on the terms set forth therein."

                                      Very truly yours,



                                      CITIGROUP GLOBAL MARKETS INC.


                                      By:  /s/ Richard T. Chang
                                          -----------------------------
                                           Name:  Richard T. Chang
                                           Title:    Managing Director

ACCEPTED:

CITIGROUP FUNDING INC.



By: /s/ Geoffrey S. Richards
    -----------------------------------
    Name:    Geoffrey S. Richards
    Title:   Vice President
             and Assistant Treasurer

CITIGROUP INC.



By: /s/ Charles E. Wainhouse
    ----------------------------------
    Name:    Charles E. Wainhouse
    Title:   Assistant Treasurer






                                     ANNEX A
                   Form of Company Opinion to the Underwriters

(i)   each of the Company and the Guarantor has been duly incorporated and is
      validly existing as a corporation in good standing under the laws of the
      State of Delaware, with full corporate power and authority to own its
      properties and conduct its business as described in the Prospectus;

(ii)  each of the Company and the Guarantor is duly qualified to do business as
      a foreign corporation in good standing in all jurisdictions in which it
      owns or leases substantial properties or in which the conduct of its
      business requires such qualification and the failure to so qualify would
      have a material adverse effect on the Company or the Guarantor, as
      applicable;

(iii) the Indenture has been duly authorized, executed and delivered by the
      Company and the Guarantor, has been duly qualified under the Trust
      Indenture Act and constitutes a legal, valid and binding instrument
      enforceable against the Company and the Guarantor in accordance with its
      terms (subject, as to enforcement, to applicable bankruptcy,
      reorganization, insolvency, moratorium and other similar laws affecting
      creditors' rights generally and to general principles of equity regardless
      of whether such enforceability is considered in a proceeding in equity or
      at law);

(iv)  the Securities have been validly authorized and, when duly executed by the
      proper officers of the Company, duly authenticated by the Trustee and
      delivered as contemplated by the Agreement and by the Indenture, will be
      validly issued and outstanding obligations of the Company enforceable in
      accordance with their terms and entitled to the benefits of the Indenture
      (subject, as to enforcement, to applicable bankruptcy, reorganization,
      insolvency, moratorium or other similar laws affecting creditors' rights
      generally and to general principles of equity regardless of whether such
      enforceability is considered in a proceeding in equity or at law) and
      conform in all material respects to the description thereof in the
      Prospectus and any "issuer free writing prospectus" (as defined in Rule
      433 under the Act);

(v)   the Guarantee has been duly authorized and constitutes a legal, valid and
      binding obligation of the Guarantor enforceable in accordance with its
      terms (subject, as to enforcement, to applicable bankruptcy,
      reorganization, insolvency, moratorium or other similar laws affecting
      creditors' rights generally and to general principles of equity regardless
      of whether such enforceability is considered in a proceeding in equity or
      at law);

(vi)  the Indenture conforms in all material respects to the description thereof
      in the Prospectus;

(vii) the Terms Agreement (including the provisions of this Agreement) has been
      duly authorized, executed and delivered by the Company and the Guarantor;

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(viii) no consent, approval, authorization, filing with or order of any court or
       governmental agency or body is required for the consummation by the
       Company and the Guarantor of the transactions contemplated herein or in
       the Indenture, except such as have been obtained under the Act and the
       Trust Indenture Act and such as may be required under the securities or
       blue sky laws of any jurisdiction in connection with the sale of the
       Securities;

(ix)   The execution, delivery and performance of the Indenture and the Terms
       Agreement (including the provisions of this Agreement) and the issuance
       and sale of the Securities in compliance with the terms and provisions
       thereof, will not result in a breach of any of the terms and provisions
       of, or constitute a default under, any of the agreements or instruments
       of the Company and the Guarantor, as the case may be, filed by the
       Guarantor with the Securities and Exchange Commission as exhibits to the
       Registration Statement and to its (i) Annual Report on Form 10-K for the
       fiscal year ended December 31, 2005; (ii) Current Reports on Form 8-K
       filed from January 13, 2006 to the Closing Date; (iii) registration
       statement on Form S-3 (Registration No. 333-117615); (iv) registration
       statement on Form S-3 (Registration No. 333-126744); and (v) registration
       statement on Form S-3 (Registration No. 333-106510), or result in a
       violation of the charter or By-Laws of the Guarantor or any of its
       material subsidiaries, including the Company, or any statute, rule,
       regulation or order of any governmental agency or body or any court
       having jurisdiction over the Guarantor or any of its material
       subsidiaries, including the Company, or any of their properties;
       provided, however, that no opinion is expressed in this paragraph with
       respect to (i) the rights to indemnity and contribution contained in the
       Terms Agreement (including the provisions of this Agreement), which may
       be limited by federal or state securities laws or the public policy
       underlying such laws; or (ii) any state securities or blue sky laws;

(x)    such counsel has no reason to believe that as of 4:00 p.m. on the date of
       the Terms Agreement, the Preliminary Final Prospectus, subject to
       completion, dated February 17, 2006, including the documents incorporated
       by reference therein, and the document listed in Schedule I hereto
       (except as to the financial statements or other data of a financial or
       statistical nature contained therein, as to which no opinion is
       expressed), contained any untrue statement of a material fact or omitted
       to state any material fact necessary in order to make the statements
       therein, in the light of the circumstances under which they were made,
       not misleading; and

(xi)   the Registration Statement was declared effective under the Act, and, to
       the knowledge of such counsel, no stop order suspending its effectiveness
       has been issued and no proceedings for that purpose have been instituted
       or are pending or have been communicated by the Commission to the Company
       as being contemplated by it under the Act. The Registration Statement, as
       of its effective date, and the Final Prospectus, as of its date and as of
       the Closing Date, comply as to form in all material respects with the
       requirements of the Act, the Exchange Act and the Trust Indenture Act and
       the applicable rules and regulations thereunder (except as to the
       financial statements or other data of a financial or statistical nature
       or the Statements of Eligibility (Forms T-1) under the Trust Indenture
       Act of the Trustee, as to which no opinion is expressed); and such
       counsel has no reason to believe that the Registration Statement, as of
       its most recent effective date


                                       6


      determined pursuant to Rule 430B(f)(2) under the Act, contained any untrue
      statement of a material fact or omitted to state any material fact
      required to be stated therein or necessary to make the statements therein
      not misleading or that the Final Prospectus, as of its date or on the
      Closing Date, contained or contains any untrue statement of a material
      fact or omitted or omits to state any material fact required to be stated
      therein or necessary to make the statements therein, in the light of the
      circumstances under which they were made, not misleading (except as to the
      financial statements or other data of a financial or statistical nature,
      as to which no opinion is expressed). The description in the Registration
      Statement and the Final Prospectus of statutes, legal and governmental
      proceedings and contracts and other documents are accurate and fairly
      present the information required to be shown; and such counsel does not
      know of any legal or governmental proceedings required to be described in
      the Final Prospectus which are not described as required or of any
      contracts or documents of a character required to be described in the
      Registration Statement or the Final Prospectus or to be filed as exhibits
      to the Registration Statement which are not described and filed as
      required.

      In rendering such opinion, such counsel may rely (i) as to matters
      involving the application of laws of any jurisdiction other than the State
      of New York or the Federal laws of the United States, to the extent they
      deem proper and specified in such opinion, upon the opinion of other
      counsel of good standing whom they believe to be reliable and who are
      satisfactory to counsel for the Underwriters and (ii) as to matters of
      fact, to the extent they deem proper, on certificates of responsible
      officers of the Company and the Guarantor and public officials. References
      to the Final Prospectus in this paragraph (b) shall also include any
      supplements thereto at the Closing Date.


                                       7




                                   SCHEDULE I

1. Offering Summary dated February 17, 2006, as first filed with the Commission
pursuant to Rule 433 under the Securities Act.


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