<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-08-12</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000876523</issuerCik>
        <issuerName>EZCORP INC</issuerName>
        <issuerTradingSymbol>EZPW</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001054645</rptOwnerCik>
            <rptOwnerName>COHEN PHILLIP EAN</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>30 EAST 71ST #1A</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10021</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Shareholder</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Non-Voting Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-08-12</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2004-08-12</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1500</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>6.9467</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1201054</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The Securities being disposed are pursuant to a margin call.</footnote>
        <footnote id="F2">In addition to the Class A Non-Voting Common Stock owned by Mr. Cohen, the amount of securities beneficially owned by Mr. Cohen include 1,190,057 shares of and warrants for 4,074 of the Class B Voting Common Stock of the Company which is owned by MS Pawn Limited Partnership whose general partner is MS Pawn Corporation.  Mr. Cohen owns all of the issued and outstanding stock of MS Pawn Corporation.  Additionally, the amount of securities beneficially owned by Mr. Cohen includes warrants for 4,093 shares of Class A Non-Voting Common Stock held by MS Pawn Limited Partnership and warrants for 1,292 shares of Class A Non-Voting Common Stock held by Mr. Cohen.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Philip E. Cohen</signatureName>
        <signatureDate>2004-08-13</signatureDate>
    </ownerSignature>
</ownershipDocument>

