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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2022-01-31</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001580608</issuerCik>
        <issuerName>Santander Consumer USA Holdings Inc.</issuerName>
        <issuerTradingSymbol>SC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001015844</rptOwnerCik>
            <rptOwnerName>HOLIDAY EDITH E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O SANTANDER CONSUMER USA HOLDINGS INC.</rptOwnerStreet1>
            <rptOwnerStreet2>1601 ELM STREET, SUITE 800</rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75201</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2022-01-31</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>16421</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Disposed of pursuant to the closing, on January 31, 2022, of the merger (&quot;Merger&quot;) whereby Max Merger Sub, Inc. (&quot;Merger Sub&quot;) merged with and into the Issuer, pursuant to the Agreement and Plan of Merger, dated August 23, 2021 (the &quot;Merger Agreement&quot;), by and between the Issuer, Santander Holdings USA, Inc. (&quot;Parent&quot;) and Merger Sub.  Pursuant to the Merger Agreement, each share of Common Stock held by the Reporting Person (other than restricted stock units of the Issuer (&quot;Company RSUs&quot;)) was converted into the right to receive $41.50 (the &quot;per share price&quot;), less any required withholding taxes, in the form of American Depositary Shares of Banco Santander (&quot;ADRs&quot;).  The number of shares reported includes 1,340 Company RSUs.</footnote>
        <footnote id="F2">(Continued From Footnote 1) Under the Merger Agreement, each Company RSU outstanding immediately prior to the effective time of the Merger was canceled and replaced with a restricted stock unit award providing the holder a right to receive a number of ADRs equal to the per share price divided by the closing value of an ADR immediately before the signing date.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Christopher Pfirrman, Attorney-in-Fact</signatureName>
        <signatureDate>2022-02-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
