Filed Pursuant to Rule 433
Registration Nos. 333-132370, 333-132370-1

Equity First Protection First OFFERING SUMMARY (Related to the Pricing Supplement No. 2008-MTNDD-241, Subject to Completion, Dated March 27, 2008) CITIGROUP FUNDING INC. Any Payments Due from Citigroup Funding Inc. Fully and Unconditionally Guaranteed by Citigroup Inc. Medium-Term Notes, Series D Contingent Participation Principal Protected Notes Contingent Participation Principal Protected Notes Based Upon the Russell 2000^® Index Due 2009 Citigroup Funding Inc., the issuer, and Citigroup Inc., the guarantor, have filed a registration statement (including a prospectus supplement and related prospectus) with the Securities and Exchange Commission (“SEC”) for the offering to which this communication relates. Before you invest, you should read the prospectus supplement and the related prospectus in that registration statement (File No. 333-132370) and the other documents Citigroup Funding and Citigroup Inc. have filed with the SEC for more complete information about Citigroup Funding, Citigroup and this offering. You may get these documents for free by visiting EDGAR on the SEC website at www.sec.gov. Alternatively, you can request the prospectus by calling toll-free 1-877-858-5407. Investment Products Not FDIC Insured May Lose Value No Bank Guarantee March 27, 2008

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Principal Protected Notes  2

TABLE OF CONTENTS

Contingent Participation
Principal Protected Notes

Based Upon the Russell 2000^® Index

Due 2009

This offering summary contains a summary of the terms and conditions of the Principal Protected Notes. We encourage you to read the preliminary pricing supplement and accompanying prospectus supplement and prospectus related to this offering for important additional information. Capitalized terms used in this summary are defined in the section “Preliminary Terms” below.

Overview of the Notes

The Contingent Participation Principal Protected Notes Based Upon the Russell 2000^® Index (the “Notes”) are offered by Citigroup Funding Inc. and have a maturity of approximately 18 months. The Notes pay an amount at maturity, if any, that will depend on the closing value of the Russell 2000^® Index (the “Underlying Index”) being within a specified range on every Index Business Day from the Pricing Date up to and including the Valuation Date and will be based on the percentage change of the Underlying Index from the Pricing Date up to and including the Valuation Date. If the Ending Value does not equal the Starting Value and the closing value of the Underlying Index on every Index Business Day from the Pricing Date up to and including the Valuation Date is BOTH greater than or equal to approximately 75% to 79% (to be determined on the Pricing Date) of the Starting Value AND less than or equal to approximately 121% to 125% (to be determined on the Pricing Date) of the Starting Value, the payment you receive at maturity for each $10 principal amount note you initially invest will be greater than $10. If, however, the closing value of the Underlying Index on any Index Business Day from the Pricing Date up to and including the Valuation Date is greater than approximately 121% to 125% (to be determined on the Pricing Date) of the Starting Value or is less than approximately 75% to 79% (to be determined on the Pricing Date) of the Starting Value, the return on the Notes will be zero, regardless of whether the Ending Value is greater than or less than the Starting Value. In addition, if the Ending Value equals the Starting Value, the return on the Notes will be zero and the payment you receive at maturity for each Note you then hold will equal $10, regardless of whether the closing value was always within the specified range.

Some key characteristics of the Notes include:

£      Principal Protection.  Your initial investment is 100% principal protected only if you hold your Notes to maturity. Notes sold in the secondary market prior to maturity are not principal protected. If you hold your Note to maturity, you will receive at maturity an amount in cash equal to your initial investment plus the Note Return Amount which may be positive or zero. If the Ending Value does not equal the Starting Value and if the closing value of the Underlying Index on every Index Business Day from the Pricing Date up to and including the Valuation Date is BOTH greater than or equal to approximately 75% to 79% (to be determined on the Pricing Date) of the Starting Value AND less than or equal to approximately 121% to 125% (to be determined on the Pricing Date) of the Starting Value, the Note Return Amount will be positive. In all other circumstances, the Note Return Amount will be zero, and at maturity you will receive only your initial investment.

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Principal Protected Notes  3

£	No Periodic Payments.  You will not receive any periodic payments of interest or other periodic payments on the Notes. Instead, the return on the Notes, if any, will vary depending on the performance of the Underlying Index and will be paid at maturity based upon (i) the closing value of the Underlying Index on every Index Business Day from the Pricing Date up to and including the Valuation Date and (ii) the absolute value of the positive or negative percentage change in the value of the Underlying Index from the Pricing Date to the Valuation Date. The return on the Notes may be lower than that of a conventional fixed-rate debt security of Citigroup Funding of comparable maturity and may be zero. In addition, you will not receive any dividend payments or other distributions, if any, on the stocks included in the Underlying Index.
£	Contingent Limited Participation in Potential Change in Value of Underlying Index.  In certain circumstances, the Notes potentially allow investors to gain from either the positive or negative return of the Underlying Index from the Pricing Date to the Valuation Date so long as the fluctuations in the closing value of the Underlying Index are within a specified range of values on every Index Business Day during the term of the Notes. If the closing value of the Underlying Index on any Index Business Day from the Pricing Date up to and including the Valuation Date is greater than approximately 121% to 125% (to be determined on the Pricing Date) of the Starting Value or is less than approximately 75% to 79% (to be determined on the Pricing Date) of the Starting Value, the return on the Notes will be zero. In addition, if the Ending Value equals the Starting Value, at maturity you will receive only your initial investment in the Notes even if the closing value of the Underlying Index on every Index Business Day during the term of the Notes is within the specified range.
£	Tax Treatment.  The federal income tax treatment of the Notes differs from the tax treatment of traditional fixed-rate notes. The federal income tax treatment of the Notes will require U.S. investors to include original issue discount (“OID”) for U.S. federal income tax purposes in gross income on a constant yield basis annually over the term of the Notes, although U.S. investors will receive no payments with respect to the Notes before maturity. Non-U.S. investors will generally not be subject to U.S. income or withholding tax, provided that certain certification requirements are met. See “Certain U.S. Federal Income Tax Considerations — United States Investors” in the preliminary pricing supplement for further information.

An investment in the Notes involves significant risks. You should refer to “Key Risk Factors for the Notes” below and “Risk Factors Relating to the Notes” in the preliminary pricing supplement related to this offering for a description of the risks.

Types of Investors

The Notes are not a suitable investment for investors who require regular fixed income payments since no interest payments or investment returns, if any, will be paid prior to the maturity of the Notes. These Notes may be an appropriate investment for the following types of investors:

£

Investors looking for exposure to equity investments on a principal protected basis who do not expect that on any Index Business Day from the Pricing Date to and including the Valuation Date the closing value of the Russell 2000® Index will fluctuate upward or downward by more than approximately 21% to 25% (to be determined on the Pricing Date) from its Starting Value or that the closing value on the Valuation Date will be equal to the Starting Value on the Pricing Date.

£

Investors who seek to add an equity index-linked investment to their portfolio for diversification purposes.

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Principal Protected Notes  4

Preliminary Terms

Issuer:	Citigroup Funding Inc.
Security:	Contingent Participation Principal Protected Notes Based Upon the Russell 2000® Index Due 2009
Guarantee:	Any payments due on the Notes are fully and unconditionally guaranteed by Citigroup Inc., Citigroup Funding’s parent company.
Rating of the Issuer’s Obligations:	Aa3/AA- (Moody’s/S&P) based upon the Citigroup Inc. guarantee of payments due on the Notes and subject to change during the term of the Notes.
Principal Protection:	100% if held on the Maturity Date
Pricing Date:	April   , 2008
Issue Date:	Approximately three Index Business Days after the Pricing Date
Valuation Date:	Approximately three Index Business Days before the Maturity Date
Index Business Day:	An Index Business Day means a day, as determined by the Calculation Agent, on which the banking institutions in New York are not authorized to be closed and the Russell 2000® Index or any successor index is calculated and published and on which securities comprising more than 80% of the value of the Russell 2000® Index on such day are capable of being traded on their relevant exchanges or markets during the one-half hour before the determination of the closing value of the Russell 2000® Index.
Maturity Date:	Approximately 18 months after the Issue Date
Issue Price:	$10 per Note
Underlying Index:	Russell 2000® Index
Coupon:	None
Maturity Payment:	For each $10 Note, $10 plus a Note Return Amount, which may be positive or zero.
Note Return Amount:	For each $10 Note:
	(i)     an amount equal to the product of (a) $10 and (b) the Absolute Index Return Percentage, if the closing value of the Underlying Index on every Index Business Day from the Pricing Date up to and including the Valuation Date is BOTH less than or equal to approximately 121% to 125% (to be determined on the Pricing Date) of the Starting Value AND greater than or equal to approximately 75% to 79% (to be determined on the Pricing Date) of the Starting Value, or
	(ii)    zero in all other circumstances
Absolute Index Return Percentage:	The Absolute Index Return Percentage will equal the percentage change in the closing value of the Underlying Index from the Pricing Date up to and including the Valuation Date, without regard to whether the change was positive or negative, expressed as a percentage:
	Ending Value − Starting Value
	­ ­
	Starting Value
	Provided that if the above calculation results in a negative percentage, the Absolute Index Return Percentage shall be equal to the product of (i) the negative percentage computed above and (ii) — 1. Thus, the Absolute Index Return Percentage will always be positive or zero.
Starting Value:	The closing value of the Underlying Index on the Pricing Date
Ending Value:	The closing value of the Underlying Index on the Valuation Date
Listing:	The Notes will not be listed on any exchange.
Underwriting Discount:	1.75% (including the 1.50% Sales Commission defined below)
Sales Commission Earned:	$0.15 per Note for each Note sold by a Smith Barney Financial Advisor
Calculation Agent:	Citigroup Global Markets Inc.
CUSIP/ISIN:

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Principal Protected Notes  5

Benefits of the Notes

£	Contingent Limited Participation in Potential Change in the Value of the Underlying Index.  If held to maturity, the Notes potentially allow investors to gain from either a positive or negative percentage change in the closing value of the Underlying Index from the Pricing Date to the Valuation Date, so long as the closing value of the Underlying Index on every Index Business Day during that period is BOTH less than or equal to approximately 121% to 125% (to be determined on the Pricing Date) of the Starting Value AND greater than or equal to approximately 75% to 79% (to be determined on the Pricing Date) of the Starting Value.
£	Principal Preservation.  If you hold your Notes to maturity, at maturity you will receive at least your initial investment, regardless of the Ending Value of the Underlying Index or the closing values of the Underlying Index during the term of the Notes.
£	Diversification Potential.  The Notes are linked to the Underlying Index and may allow you to diversify an existing portfolio mix of deposits, stocks, bonds, mutual funds and cash.

Key Risk Factors for the Notes

£	Possibility of No Appreciation.  The return on the Notes, if any, is dependent on the closing value of the Underlying Index being within a specified range of values on every Index Business Day from the Pricing Date up to and including the Valuation Date and may be zero. If the closing value of the Underlying Index on any Index Business Day from the Pricing Date up to and including the Valuation Date is greater than approximately 121% to 125% (to be determined on the Pricing Date) of the Starting Value or is less than approximately 75% to 79% (to be determined on the Pricing Date) of the Starting Value, the payment you receive at maturity for each Note you then hold will be limited to your initial investment of $10 per Note, even if the Ending Value of the Underlying Index is greater than or less than its Starting Value. In addition, if the Ending Value equals the Starting Value, the return on the Notes will be zero and you will receive at maturity for each Note you then hold only your initial investment of $10 per Note, regardless of whether the closing value was always within the specified range.
£	Appreciation May Be Limited.  The return on the Notes, if any, may be less than the return on an instrument that would permit you to participate fully in the appreciation of the Underlying Index or an investment in the stocks included in the Underlying Index. Because the Note Return Amount is based on the absolute value of the positive or negative percentage change in the closing value of the Underlying Index from the Pricing Date to the Valuation Date and because the Note Return Amount will equal zero if the closing value of the Underlying Index on any Index Business Day from the Pricing Date up to and including the Valuation Date is greater than approximately 121% to 125% (to be determined on the Pricing Date) of the Starting Value or is less than approximately 75% to 79% (to be determined on the Pricing Date) of the Starting Value, the Note Return Amount will not exceed approximately 21% to 25% (or 14.00% to 16.67% per annum on a simple interest basis) (to be determined on the Pricing Date) of your initial investment. In addition, if the Ending Value equals the Starting Value, at maturity you will receive your initial investment of $10 per Note even if the closing value of the Underlying Index on every Index Business Day during the term of the Notes is within the specified range. (See examples under “Hypothetical Maturity Payments” below).
£	No Periodic Payments.  You will not receive any periodic payments of interest or any other periodic payments on the Notes. In addition, you will not be entitled to receive dividend payments or other distributions, if any, made on the stocks included in the Underlying Index.

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Principal Protected Notes  6

£	Potential for a Lower Comparable Yield.  Because you will not receive any periodic payments of interest or any other periodic payments on the Notes, if the Ending Value is less than           or more than          , the effective yield on the Notes may be less than that which would be payable on a conventional fixed-rate debt security of Citigroup Funding of comparable maturity, even if the closing value of the Underlying Index has stayed within the specified range during the term of the Notes. The return on the Notes may be zero.
£	Exchange Listing and Secondary Market.  The Notes will not be listed on any exchange. There is currently no secondary market for the Notes. Even if a secondary market does develop, it may not be liquid and may not continue for the term of the Notes. Although Citigroup Global Markets Inc. intends to make a secondary market in the Notes, it is not obligated to do so.
£	The Resale Value of the Notes May Be Lower Than Your Initial Investment.  Due to, among other things, changes in the value of the Underlying Index, interest rates, the earnings performance of the issuers of the stocks included in the Underlying Index, other economic conditions, and Citigroup Funding and Citigroup’s perceived creditworthiness, the Notes may trade at prices below their initial issue price of $10 per Note. You could receive substantially less than your initial investment if you sell your Notes.
£	Fees and Conflicts.  Citigroup Global Markets and its affiliates involved in this offering are expected to receive compensation for activities and services provided in connection with the Notes. Further, Citigroup Funding expects to hedge its obligations under the Notes through the trading in one or more of the stocks included in the Underlying Index or derivative instruments related to the Underlying Index by one or more of its affiliates. Each of Citigroup Funding’s or its affiliates’ hedging activities and Citigroup Global Markets’ role as the Calculation Agent for the Notes may result in a conflict of interest.
£	Citigroup Inc. Credit Risk.  The Notes are subject to the credit risk of Citigroup Inc., Citigroup Funding’s parent company and the guarantor of any payments due on the Notes.

Description of the Russell 2000^® Index

General.  Unless otherwise stated, all information on the Russell 2000^® Index provided in this Pricing Supplement is derived from the Russell Investment Group (“Russell”) or other publicly available sources. The Russell 2000^® Index is published by Russell and is intended to provide a comprehensive and unbiased barometer of the small-cap segment of the U.S. equity universe. The Russell 2000^® Index is completely reconstituted annually to ensure larger stocks do not distort the performance and characteristics of the true small-cap equities. Since September 2004, eligible initial public offerings (“IPOs”) of stock have also been added to the Russell 2000^® Index at the end of each calendar quarter in order to ensure new additions to the investing opportunity set are reflected in the index. The Russell 2000^® Index includes the smallest 2000 securities, according to market capitalization, in the Russell 3000E^tm Index.

As of February 29, 2008, the largest five sectors represented by the Russell 2000^® Index were Financial Services, Consumer Discretionary and Services, Health Care, Technology and Materials and Processing. Real-time dissemination of the value of the Russell 2000^® Index by Reuters began in December 1986.

THE RUSSELL 2000^® INDEX DOES NOT REFLECT THE PAYMENT OF DIVIDENDS ON THE STOCKS UNDERLYING IT AND THEREFORE THE RETURN ON THE NOTES WILL NOT PRODUCE THE SAME RETURN YOU WOULD RECEIVE IF YOU WERE TO PURCHASE SUCH UNDERLYING STOCKS AND HOLD THEM UNTIL THE MATURITY DATE.

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Principal Protected Notes  7

Historical Data on the Russell 2000^® Index

The following table sets forth the high and low closing values of the Russell 2000^® Index for each month in the period from January 2003 through February 2008. These historical data on the Russell 2000^® Index are not indicative of the future performance of the Russell 2000^® Index or what the market value of the Notes may be. Any historical upward or downward trend in the value of the Russell 2000^® Index during any period set forth below is not an indication that the Russell 2000^® Index is more or less likely to increase or decrease at any time during the term of the Notes.

	2003		2004		2005		2006		2007		2008
January		372.17		580.76		624.02		733.20		800.34		713.30
February		360.52		585.56		634.06		730.64		793.30		686.18
March		364.54		590.31		615.07		765.14		800.71
April		398.68		559.80		579.38		764.54		814.57
May		441.00		568.28		616.71		721.01		847.18
June		448.37		591.52		639.66		724.67		833.70
July		476.02		551.29		679.75		700.56		776.12
August		497.42		547.93		666.51		720.53		792.86
September		487.68		572.94		667.80		725.59		805.45
October		528.22		583.79		646.61		766.84		828.02
November		546.51		633.77		677.29		786.12		767.77
December		556.91		651.57		673.22		787.66		766.03

The following graph illustrates the historical performance of the Russell 2000^® Index based on the month-end closing values from January 2003 through February 2008. Past values of the Russell 2000^® Index are not indicative of future Russell 2000^® Index values.

Russell 2000^® Index Closing Values

On March 26, 2008, the closing value of the Russell 2000^® Index was 702.11.

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Principal Protected Notes  8

Additional information on the Russell 2000^® Index, including its makeup, method of calculation, and changes in its components, is included in the preliminary pricing supplement related to this offering under “Description of the Russell 2000^® Index.” All such disclosures in the preliminary pricing supplement and the information on the Russell 2000^® Index provided in this Offering Summary are derived from publicly available information. None of Citigroup Funding, Citigroup Inc., or Citigroup Global Markets assumes any responsibility for the accuracy or completeness of such information. You should also be aware that an investment in the Notes does not entitle you to any dividends, voting rights or any other ownership or other interest in respect of the stocks of the companies included in the Russell 2000^® Index.

License Agreement.  Russell and Citigroup Global Markets have entered into a non-exclusive license agreement providing for the license to Citigroup Global Markets and its affiliates, in exchange for a fee, of the right to use indices owned and published by Russell in connection with certain financial instruments, including the Notes.

The license agreement between Russell and Citigroup Global Markets provides that the following language must be stated in this Pricing Supplement.

“The Notes are not sponsored, endorsed, sold or promoted by Russell. Russell makes no representation or warranty, express or implied, to the owners of the Notes or any member of the public regarding the advisability of investing in financial products generally or in the Notes particularly or the ability of the Russell 2000^® Index to track general stock market performance or a segment of the same. Russell’s publication of the Russell 2000^® Index in no way suggests or implies an opinion by Russell as to the advisability of investment in any or all of the securities upon which the Russell 2000^® Index is based. Russell’s only relationship to Citigroup Global Markets is the licensing of certain trademarks and trade names of Russell and of the Russell 2000^® Index which is determined, composed and calculated by Russell without regard to Citigroup Global Markets or the Notes. Russell is not responsible for and has not reviewed the Notes nor any associated literature or publications and Russell makes no representation or warranty express or implied as to their accuracy or completeness, or otherwise. Russell reserves the right, at any time and without notice, to alter, amend, terminate or in any way change the Russell 2000^® Index. Russell has no obligation or liability in connection with the administration, marketing or trading of the Notes.

RUSSELL DOES NOT GUARANTEE THE ACCURACY AND/OR THE COMPLETENESS OF THE RUSSELL 2000^® INDEX OR ANY DATA INCLUDED THEREIN AND RUSSELL SHALL HAVE NO LIABILITY FOR ANY ERRORS, OMISSIONS, OR INTERRUPTIONS THEREIN. RUSSELL MAKES NO WARRANTY, EXPRESS OR IMPLIED, AS TO RESULTS TO BE OBTAINED BY CITIGROUP FUNDING INC., INVESTORS, HOLDERS OF THE NOTES, OR ANY OTHER PERSON OR ENTITY FROM THE USE OF THE RUSSELL 2000^® INDEX OR ANY DATA INCLUDED THEREIN. WITHOUT LIMITING ANY OF THE FOREGOING, IN NO EVENT SHALL RUSSELL HAVE ANY LIABILITY FOR ANY SPECIAL, PUNITIVE, INDIRECT, OR CONSEQUENTIAL DAMAGES (INCLUDING LOST PROFITS), EVEN IF NOTIFIED OF THE POSSIBILITY OF SUCH DAMAGES.”

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Principal Protected Notes  9

Hypothetical Maturity Payments

The Note Return Amount will depend on the closing value of the Underlying Index on every Index Business Day from the Pricing Date up to and including the Valuation Date and on the Ending Value of the Underlying Index. Because the closing value of the Underlying Index may be subject to significant variations over the term of the Notes, it is not possible to present a chart or table illustrating a complete range of possible payments at maturity. The examples of hypothetical maturity payments set forth below are intended to illustrate the effect of different Ending Values of the Underlying Index on the return on the Notes at maturity, depending on whether the closing value of the Underlying Index on every Index Business Day from the Pricing Date up to and including the Valuation Date is both less than or equal to approximately 123% of the Starting Value and greater than or equal to approximately 77% of the Starting Value. All of the hypothetical examples assume an investment in the Notes of $10, that the Starting Value is 680.00, that 123% of the Starting Value is 836.40, that 77% of the Starting Value is 523.60, that the term of the Notes is 18 months, and that an investment is made on the initial issue date and held to maturity.

As demonstrated by the examples below, if the closing value of the Underlying Index on every Index Business Day from the Pricing Date up to and including the Valuation Date is both less than or equal to 836.40 and greater than or equal to 523.60, the return will be equal to the Absolute Index Return Percentage and, so long as the Ending Value does not equal the Starting Value, the payment at maturity will be greater than the initial investment of $10 per Note. If, however, the closing value of the Underlying Index on any Index Business Day from the Pricing Date up to and including the Valuation Date is greater than 836.40 or less than 523.60, the return on the Notes will be zero, regardless of whether the Ending Value is greater than or less than the Starting Value.

	Percentage			Scenario I:
	Change in			All Closing Values Are Less Than					Scenario II:
	the Closing			or Equal to 836.40 and Greater Than					One or More Closing Values Are
Ending	Value from			or Equal to 523.60(1)					Greater Than 836.40 or Less Than
Value of	the Pricing								523.60(2)
Russell	Date to the			Total			Total Payment at					Total Payment at
2000®	Valuation			Return on			Maturity on the		Total Return on			Maturity on the
Index	Date (%)			the Notes			Notes		the Notes			Notes
340.00		—50.00	%		NA			NA		0	%	$	10.00
374.00		—45.00	%		NA			NA		0	%	$	10.00
408.00		—40.00	%		NA			NA		0	%	$	10.00
442.00		—35.00	%		NA			NA		0	%	$	10.00
476.00		—30.00	%		NA			NA		0	%	$	10.00
510.00		—25.00	%		NA			NA		0	%	$	10.00
544.00		—20.00	%		20.00	%	$	12.00		0	%	$	10.00
578.00		—15.00	%		15.00	%	$	11.50		0	%	$	10.00
612.00		—10.00	%		10.00	%	$	11.00		0	%	$	10.00
646.00		—5.00	%		5.00	%	$	10.50		0	%	$	10.00
680.00		0.00	%		0.00	%	$	10.00		0	%	$	10.00
714.00		5.00	%		5.00	%	$	10.50		0	%	$	10.00
748.00		10.00	%		10.00	%	$	11.00		0	%	$	10.00
782.00		15.00	%		15.00	%	$	11.50		0	%	$	10.00
816.00		20.00	%		20.00	%	$	12.00		0	%	$	10.00
850.00		25.00	%		NA			NA		0	%	$	10.00
884.00		30.00	%		NA			NA		0	%	$	10.00
918.00		35.00	%		NA			NA		0	%	$	10.00
952.00		40.00	%		NA			NA		0	%	$	10.00
986.00		45.00	%		NA			NA		0	%	$	10.00
1020.00		50.00	%		NA			NA		0	%	$	10.00

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Principal Protected Notes  10

(1)	The closing value of the Underlying Index on every Index Business Day from the Pricing Date up to and including the Valuation Date has been less than or equal to 836.40, which is 123% of the Starting Value, and greater than or equal to 523.60, which is 77% of the Starting Value.
(2)	The closing value of the Underlying Index on any Index Business Day from the Pricing Date up to and including the Valuation Date has been greater than 836.40, which is 123% of the Starting Value, or less than 523.60, which is 77% of the Starting Value.

The examples are for purposes of illustration only. The actual Note Return Amount will depend on the actual Starting Value, the Ending Value, and other relevant parameters.

Certain U.S. Federal Income Tax Considerations

The following summarizes certain federal income tax considerations for initial U.S. investors that hold the Notes as capital assets.

All investors should refer to the preliminary pricing supplement related to this offering and the accompanying prospectus supplement and prospectus for additional information relating to U.S. federal income tax and should consult their tax advisors to determine the tax consequences particular to their situation.

Because the Notes are contingent payment debt obligations of Citigroup Funding, U.S. holders of the Notes will be required to include original issue discount (“OID”) for U.S. federal income tax purposes in gross income on a constant yield basis over the term of the Notes. This tax OID (computed at an assumed comparable yield of     % compounded semiannually) will be includible in a U.S. holder’s gross income (as ordinary income) over the term of the Notes (although holders will receive no payments on the Notes prior to maturity), and generally will be reported to U.S. non-corporate holders on an IRS Form 1099. The assumed comparable yield is based on a rate at which Citigroup Funding would issue a similar debt obligation with no contingent payments. The amount of tax OID is based on an assumed amount representing all amounts payable on the Notes. This assumed amount is neither a prediction nor guarantee of the actual yield of, or payments to be made in respect of, the Notes. If the amount we actually pay at maturity is, in fact, less than this assumed amount, then a U.S. holder will have recognized taxable income in periods prior to maturity that exceeds that holder’s economic income from holding the Notes during such periods (with an offsetting ordinary loss). If the amount we actually pay at maturity is, in fact, higher than this assumed amount, then a U.S. holder will be required to include such additional amount as ordinary income. If a U.S. holder disposes of the Notes, the U.S. holder will be required to treat any gain recognized upon the disposition of the Notes as ordinary income (rather than capital gain).

Special rules will apply if the Russell 2000^® Index is greater than           (approximately 121% to 125% of the Starting Value) or is less than           (approximately 75% to 79% of the Starting Value) at any time before six months prior to maturity, so that the amount paid at the maturity of the Notes would become fixed.

In the case of a holder of the Notes that is not a U.S. person all payments made with respect to the Notes and any gain realized upon the sale or other disposition of the Notes should not be subject to U.S. income or withholding tax, provided that the holder complies with applicable certification requirements (including in general the furnishing of an IRS form W-8 or substitute form) and such payments and gain are not effectively connected with a U.S. trade or business of such holder.

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Principal Protected Notes  11

You should refer to the preliminary pricing supplement for additional information relating to U.S. federal income tax treatment and should consult your own tax advisors to determine tax consequences particular to your situation.

ERISA and IRA Purchase Considerations

Employee benefit plans subject to ERISA, entities the assets of which are deemed to constitute the assets of such plans, governmental or other plans subject to laws substantially similar to ERISA and retirement accounts (including Keogh, SEP and SIMPLE plans, individual retirement accounts and individual retirement annuities) are permitted to purchase the Notes as long as either (A)(1) no Citigroup Global Market affiliate or employee is a fiduciary to such plan or retirement account that has or exercises any discretionary authority or control with respect to the assets of such plan or retirement account used to purchase the Notes or renders investment advice with respect to those assets and (2) such plan or retirement account is paying no more than adequate consideration for the Notes or (B) its acquisition and holding of the Notes is not prohibited by any such provisions or laws or is exempt from any such prohibition.

However, individual retirement accounts, individual retirement annuities and Keogh plans, as well as employee benefit plans that permit participants to direct the investment of their accounts, will not be permitted to purchase or hold the Notes if the account, plan or annuity is for the benefit of an employee of Citigroup Global Markets or a family member and the employee receives any compensation (such as, for example, an addition to bonus) based on the purchase of Notes by the account, plan or annuity.

You should refer to the section “ERISA Matters” in the preliminary pricing supplement related to this offering for more information.

Additional Considerations

If no closing value of the Russell 2000^® Index is available on the Valuation Date or on any other relevant Index Business Day, the Calculation Agent may determine the value of such index or Currency Exchange Rate in accordance with the procedures set forth in the preliminary pricing supplement related to this offering. In addition, if the Russell 2000^® Index is discontinued, the Calculation Agent may determine the value by reference to a successor index or, if no successor index is available, in accordance with the procedures last used to calculate the value of the Russell 2000^® Index prior to any such discontinuance. You should refer to the sections “Description of the Notes — Note Return Amount”, “— Discontinuance of the Russell 2000^® Index” and “— Alteration of Method of Calculation” in the related preliminary pricing supplement for more information.

“Russell 2000^®” is a trademark of the Russell Investment Group ( Russell ) and has been licensed for use by Citigroup Funding Inc.’s affiliate, Citigroup Global Markets Inc. The Notes have not been passed on by Russell as to their legality or suitability. The Notes are not sponsored, endorsed, sold or promoted by Russell and Russell makes no warranties and bears no liability with respect to the Notes. ^© 2008 Citigroup Global Markets Inc. All rights reserved. Citi and Citi and Arc Design are trademarks and service marks of Citigroup Inc. or its affiliates and are used and registered throughout the world.