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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2022-06-22</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001839434</issuerCik>
        <issuerName>EJF Acquisition Corp.</issuerName>
        <issuerTradingSymbol>EJFA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001846983</rptOwnerCik>
            <rptOwnerName>Conley Joan C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O EJF ACQUISITION CORP.</rptOwnerStreet1>
            <rptOwnerStreet2>2107 WILSON BOULEVARD, SUITE 410</rptOwnerStreet2>
            <rptOwnerCity>ARLINGTON	VA	22201</rptOwnerCity>
            <rptOwnerState>VA</rptOwnerState>
            <rptOwnerZipCode>22201</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Class B ordinary shares</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2022-06-22</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>40000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A ordinary shares</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>40000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">As described in the prospectus for the initial public offering (File No. 333-252892) of EJF Acquisition Corp. (&quot;EJFA&quot;) under the heading &quot;Description of Securities--Founder Shares,&quot; the EJFA Class B ordinary shares were automatically convertible into EJFA Class A ordinary shares concurrently with, or immediately following, the consummation of EJFA's initial business combination on a one-for-one basis, subject to adjustment pursuant to certain anti-dilution rights.</footnote>
        <footnote id="F2">On June 22, 2022, pursuant to an Agreement and Plan of Merger dated as of September 15, 2021 (the &quot;Merger Agreement&quot;), by among EJFA, Pagaya Technologies Ltd. (&quot;Pagaya&quot;) and Rigel Merger Sub Inc., a wholly owned subsidiary of Pagaya (&quot;Merger Sub&quot;), Merger Sub merged with and into EJFA (the &quot;Merger&quot;), with EJFA surviving the Merger as a wholly-owned subsidiary of Pagaya. At the effective time of the Merger, each EJFA Class B ordinary share ceased to be outstanding and automatically converted into the right to receive one Class A ordinary share of Pagaya.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Kevin Stein, Attorney-in-Fact</signatureName>
        <signatureDate>2022-06-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
