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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-09-02</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001822993</issuerCik>
        <issuerName>Jackson Financial Inc.</issuerName>
        <issuerTradingSymbol>JXN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001116578</rptOwnerCik>
            <rptOwnerName>PRUDENTIAL PLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1 ANGEL COURT</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LONDON</rptOwnerCity>
            <rptOwnerState>X0</rptOwnerState>
            <rptOwnerZipCode>EC2R 7AG</rptOwnerZipCode>
            <rptOwnerStateDescription>UNITED KINGDOM</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001857459</rptOwnerCik>
            <rptOwnerName>Prudential (US Holdco 1) Ltd</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O PRUDENTIAL PLC</rptOwnerStreet1>
            <rptOwnerStreet2>1 ANGEL COURT</rptOwnerStreet2>
            <rptOwnerCity>LONDON</rptOwnerCity>
            <rptOwnerState>X0</rptOwnerState>
            <rptOwnerZipCode>EC2R 7AG</rptOwnerZipCode>
            <rptOwnerStateDescription>UNITED KINGDOM</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001857456</rptOwnerCik>
            <rptOwnerName>Prudential Corp Asia Ltd</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O PRUDENTIAL PLC</rptOwnerStreet1>
            <rptOwnerStreet2>1 ANGEL COURT</rptOwnerStreet2>
            <rptOwnerCity>LONDON</rptOwnerCity>
            <rptOwnerState>X0</rptOwnerState>
            <rptOwnerZipCode>EC2R 7AG</rptOwnerZipCode>
            <rptOwnerStateDescription>UNITED KINGDOM</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-09-02</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>623</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>177</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By corporation</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The record date for Prudential plc's (&quot;Prudential&quot;) in-specie distribution of shares of Class A common stock of Jackson Financial Inc. (&quot;JFI&quot;) was 6:00 p.m. UK time on September 2, 2021 for Prudential shareholders on the UK Register and Prudential ADR holders, and 5:00 p.m. Hong Kong time on September 2, 2021 for Prudential shareholders on the Hong Kong Register.  Prudential will distribute approximately 77.9% of the shares of JFI Class A common stock it owns on a pro rata basis to Prudential shareholders as of the record date.  Prudential currently owns 800 shares of JFI Class A common stock, before giving effect to the 104,960.3836276-for-1 stock split to be effected prior to the distribution date.  The  distribution date will be September 13, 2021 for Prudential shareholders on the UK Register, September 17, 2021 for Prudential ADRs and September 24, 2021 for Prudential shareholders on the Hong Kong Register.</footnote>
        <footnote id="F2">The actual number of shares of JFI Class A common stock to be distributed by Prudential will be based on the distribution ratio of one share of JFI Class A common stock for every 40 Prudential ordinary shares held by record holders on the record date.</footnote>
        <footnote id="F3">The securities reported are held directly by Prudential (US Holdco 1) Limited (&quot;PUSH&quot;) and may be deemed to be beneficially owned by Prudential Corporation Asia Limited (&quot;PCAL&quot;) and Prudential, because PCAL is the direct owner of PUSH, and Prudential is the direct owner of PCAL.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Prudential plc: /s/ Kristan L. Richardson, as Attorney-in-Fact</signatureName>
        <signatureDate>2021-09-02</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Prudential (US Holdco 1) Limited: /s/ Kristan L. Richardson, as Attorney-in-Fact</signatureName>
        <signatureDate>2021-09-02</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Prudential Corporation Asia Limited: /s/ Kristan L. Richardson, as Attorney-in-Fact</signatureName>
        <signatureDate>2021-09-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
