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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 DUEHcq8s4qgAHxwU18/rLPWHOjW61QczaTjFsfr5yoZws9W1ME71DQbiGwlgjEu+
 HXYRIE3UqgegBHy3jqq8yA==

<SEC-DOCUMENT>0001005757-03-000028.txt : 20030904
<SEC-HEADER>0001005757-03-000028.hdr.sgml : 20030904
<ACCEPTANCE-DATETIME>20030904130453
ACCESSION NUMBER:		0001005757-03-000028
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030902
FILED AS OF DATE:		20030904

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CSG SYSTEMS INTERNATIONAL INC
		CENTRAL INDEX KEY:			0001005757
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROCESSING & DATA PREPARATION [7374]
		IRS NUMBER:				860704792
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		7887 EAST BELLEVIEW AVE
		STREET 2:		SUITE 1000
		CITY:			ENGLEWOOD
		STATE:			CO
		ZIP:			80111
		BUSINESS PHONE:		3037962850

	MAIL ADDRESS:	
		STREET 1:		7887 E. BELLVIEW AVE.
		STREET 2:		SUITE 1000
		CITY:			ENGLEWOOD
		STATE:			CO
		ZIP:			80111

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FISHER WILLIAM E
		CENTRAL INDEX KEY:			0001159998
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-27512
		FILM NUMBER:		03880951

	BUSINESS ADDRESS:	
		STREET 1:		CSG SYSTEMS INTERNATIONAL INC
		STREET 2:		7887 E BELLEVIEW AVENUE SUITE 1000
		CITY:			ENGLEWOOD
		STATE:			CO
		ZIP:			80111
		BUSINESS PHONE:		3037962856

	MAIL ADDRESS:	
		STREET 1:		CSG SYSTEMS INTERNATIONAL INC
		STREET 2:		7887 E BELLEVIEW AVENUE SYSTEMS 1000
		CITY:			ENGLEWOOD
		STATE:			CO
		ZIP:			80111
</SEC-HEADER>
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<TYPE>4
<SEQUENCE>1
<FILENAME>c0001159998d20030903f4f.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-09-02</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0001005757</issuerCik><issuerName>CSG SYSTEMS INTERNATIONAL INC</issuerName>        <issuerTradingSymbol>CSGS</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001159998</rptOwnerCik><rptOwnerName>FISHER WILLIAM E</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>7887 E. BELLEVIEW AVENUE</rptOwnerStreet1><rptOwnerStreet2>SUITE 1000</rptOwnerStreet2><rptOwnerCity>ENGLEWOOD</rptOwnerCity><rptOwnerState>CO</rptOwnerState><rptOwnerZipCode>80111</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>President</officerTitle><otherText></otherText></reportingOwnerRelationship></repo
rtingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-09-02</value></transactionDate><deemedExecutionDate><value>2003-09-02</value></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>F</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>5488</value></transactionShares><transactionPricePerShare><value>15.55</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>184512</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></non
DerivativeTransaction></nonDerivativeTable><derivativeTable><derivativeHolding><securityTitle><value>Stock Options (Right to buy)</value></securityTitle><conversionOrExercisePrice><value>9.11</value></conversionOrExercisePrice><exerciseDate><value>2004-03-05</value></exerciseDate><expirationDate><value>2013-03-05</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>100000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>100000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeHolding></derivativeTable><footnotes></footnotes><ownerSignature><signatureName>Peter E. Kalan</signatureName><signatureDate>2003-09-03</signatureDate></ownerSignature></ownershipDoc
ument>

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