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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2017-05-26</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001614818</issuerCik>
        <issuerName>CardConnect Corp.</issuerName>
        <issuerTradingSymbol>CCN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000883980</rptOwnerCik>
            <rptOwnerName>FIRST DATA CORP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>225 LIBERTY STREET, 29TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10281</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001707795</rptOwnerCik>
            <rptOwnerName>Minglewood Merger Sub Inc.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>225 LIBERTY STREET, 29TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10281</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common stock</value>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Each of the Reporting Persons may be deemed to have become a 10% Owner of CardConnect Corp. (the &quot;Issuer&quot;) in connection with the entry into two Tender and Support Agreements dated as of May 26, 2017 (the &quot;Tender Agreements&quot;), by and among the Reporting Persons and each of (a) FTVentures III, L.P., FTVentures III-N, L.P., FTVentures III-T, L.P. and (b) Michael J. Mertz (each, a &quot;Stockholder&quot;), representing an aggregate of 12,587,335 shares of the Issuer's common stock beneficially owned by the Stockholders. The Tender Agreements were entered into in connection with the Agreement and Plan of Merger, dated as of May 26, 2017, by and among the Reporting Persons and the Issuer.</footnote>
        <footnote id="F2">The Reporting Persons exercise voting power in limited situations over such shares of the Issuer's common stock through the grant of an irrevocable proxy by each of the Stockholders pursuant to the Tender Agreements. The Reporting Persons have no pecuniary interest in any of such shares of the Issuer's common stock.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Stanley J. Andersen, First Data Corporation</signatureName>
        <signatureDate>2017-06-05</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Stanley J. Andersen, Minglewood Merger Sub Inc.</signatureName>
        <signatureDate>2017-06-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
