<SEC-DOCUMENT>0001959173-23-001119.txt : 20230517
<SEC-HEADER>0001959173-23-001119.hdr.sgml : 20230517
<ACCEPTANCE-DATETIME>20230517091954
ACCESSION NUMBER:		0001959173-23-001119
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20230517
DATE AS OF CHANGE:		20230517

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CSG SYSTEMS INTERNATIONAL INC
		CENTRAL INDEX KEY:			0001005757
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROCESSING & DATA PREPARATION [7374]
		IRS NUMBER:				470783182
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	000-27512
		FILM NUMBER:		23929811

	BUSINESS ADDRESS:	
		STREET 1:		169 INVERNESS DR W
		STREET 2:		SUITE 300
		CITY:			ENGLEWOOD
		STATE:			CO
		ZIP:			80112
		BUSINESS PHONE:		3037962850

	MAIL ADDRESS:	
		STREET 1:		169 INVERNESS DR W
		STREET 2:		SUITE 300
		CITY:			ENGLEWOOD
		STATE:			CO
		ZIP:			80112

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Kennedy Kenneth M
		CENTRAL INDEX KEY:			0001669146

	FILING VALUES:
		FORM TYPE:		144

	MAIL ADDRESS:	
		STREET 1:		33 W MONROE ST, SUITE 900
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60603
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001669146</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001005757</issuerCik>
      <issuerName>CSG SYSTEMS INTERNATIONAL INC</issuerName>
      <secFileNumber>000-27512</secFileNumber>
      <issuerAddress>
        <com:street1>169 INVERNESS DR W</com:street1>
        <com:street2>SUITE 300</com:street2>
        <com:city>ENGLEWOOD</com:city>
        <com:stateOrCountry>CO</com:stateOrCountry>
        <com:zipCode>80112</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>3037962850</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Kennedy Kenneth M</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Fidelity Brokerage Services LLC</name>
        <address>
          <com:street1>900 Salem Street</com:street1>
          <com:city>Smithfield</com:city>
          <com:stateOrCountry>RI</com:stateOrCountry>
          <com:zipCode>02917</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>9000</noOfUnitsSold>
      <aggregateMarketValue>443700.00</aggregateMarketValue>
      <noOfUnitsOutstanding>31682626</noOfUnitsOutstanding>
      <approxSaleDate>05/17/2023</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>02/19/2021</acquiredDate>
      <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>9000</amountOfSecuritiesAcquired>
      <paymentDate>02/19/2021</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>05/17/2023</noticeDate>
      <planAdoptionDates>
        <planAdoptionDate>02/28/2022</planAdoptionDate>
      </planAdoptionDates>
      <signature>/s/ Jennifer Ruchti, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Kenneth M. Kennedy</signature>
    </noticeSignature>
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