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

    <schemaVersion>X0306</schemaVersion>

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    <periodOfReport>2018-03-12</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001058290</issuerCik>
        <issuerName>COGNIZANT TECHNOLOGY SOLUTIONS CORP</issuerName>
        <issuerTradingSymbol>CTSH</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001684713</rptOwnerCik>
            <rptOwnerName>Kandiah Gajakarnan Vibushanan</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O COGNIZANT TECHNOLOGY SOLUTIONS CORP.</rptOwnerStreet1>
            <rptOwnerStreet2>500 FRANK W. BURR BLVD.</rptOwnerStreet2>
            <rptOwnerCity>TEANECK</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>07666</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President - Digital Business</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

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                <value>Class A Common Stock</value>
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                <equitySwapInvolved>0</equitySwapInvolved>
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                <value></value>
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                <transactionPricePerShare>
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                </transactionShares>
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                    <value>8537</value>
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                </directOrIndirectOwnership>
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    <derivativeTable>
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            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
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            <expirationDate>
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                <footnoteId id="F5"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1189</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>13806</value>
                </sharesOwnedFollowingTransaction>
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    <footnotes>
        <footnote id="F1">Shares of the Company's Class A Common Stock received from the vesting of 1/12 of the restricted stock unit award granted on December 12, 2017.</footnote>
        <footnote id="F2">Represents the portion of shares of Class A Common Stock that the Company determined to settle in cash to pay applicable tax withholding.</footnote>
        <footnote id="F3">Such shares were sold pursuant to a Rule 10b5-1 Sales Plan.</footnote>
        <footnote id="F4">Each restricted stock unit represents a contingent right to receive one share of the Company's Class A Common Stock.</footnote>
        <footnote id="F5">The restricted stock units were granted on December 12, 2017 under the Cognizant Technology Solutions Corporation 2017 Incentive Compensation Plan and vest in quarterly installments over three years, commencing on March 12, 2018, with 1/12th of the stock units vesting on each quarterly vesting date so that the stock units will be fully vested on the twelfth quarterly vesting date. The stock units will be fully vested on December 12, 2020.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Harry Demas, on behalf of Gajakarnan Kandiah, by Power of Attorney</signatureName>
        <signatureDate>2018-03-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
