<SUBMISSION>
<ACCESSION-NUMBER>0001247285-03-000007
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20031021
<FILING-DATE>20031021
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>CP INTERNATIONAL INVESTMENTS LTD
<CIK>0001107344
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>000-26489
<FILM-NUMBER>03949841
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>CP INTERNATIONAL INVESTMENT LTD NSW 1028
<STREET2>54-58 PARK STREET SYDNEY AUSTRALIA
<CITY>SYDNEY
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>C.P. INVESTMENTS LIMITED
<STREET2>54-58 PARK STREET AUSTRALIA NSW 1028
<CITY>SYDNEY
</MAIL-ADDRESS>
</REPORTING-OWNER>
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>ENCORE CAPITAL GROUP INC
<CIK>0001084961
<ASSIGNED-SIC>6153
<IRS-NUMBER>481090909
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>5775 ROSECOE COURT
<CITY>SAN DIEGO
<STATE>CA
<ZIP>92123
<PHONE>8007590327
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>5775 ROSCOE COURT
<CITY>SAN DIEGO
<STATE>CA
<ZIP>92123
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>MCM CAPITAL GROUP INC
<DATE-CHANGED>19990430
</FORMER-COMPANY>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>MIDLAND CORP OF KANSAS
<DATE-CHANGED>19990423
</FORMER-COMPANY>
</ISSUER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>

<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2003-10-21</periodOfReport>


    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001084961</issuerCik>
        <issuerName>ENCORE CAPITAL GROUP INC</issuerName>
        <issuerTradingSymbol>ECPG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001107344</rptOwnerCik>
            <rptOwnerName>CP INTERNATIONAL INVESTMENTS LTD</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1></rptOwnerStreet1>
            <rptOwnerStreet2>54-58 PARK STREET</rptOwnerStreet2>
            <rptOwnerCity>SYDNEY</rptOwnerCity>
            <rptOwnerState>C3</rptOwnerState>
            <rptOwnerZipCode>NSW 2000</rptOwnerZipCode>
            <rptOwnerStateDescription>AUSTRALIA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>

        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2003-10-21</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>303199</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>11</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4920705</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>

    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Underwriters' exercise of over allotment option pursuant to Underwriting Agreement, dated as of September 25, 2003.</footnote>
    </footnotes>


    <ownerSignature>
        <signatureName>/s/ David John Barnett</signatureName>
        <signatureDate>2003-10-21</signatureDate>
    </ownerSignature>

</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
