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

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-12-11</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001101215</issuerCik>
        <issuerName>BREAD FINANCIAL HOLDINGS, INC.</issuerName>
        <issuerTradingSymbol>BFH</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001843064</rptOwnerCik>
            <rptOwnerName>Greer Valerie E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5 HILLMAN DRIVE, SUITE 103</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CHADDS FORD</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>19317</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>EVP, Chief Commercial Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-12-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1256</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>73.62</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>151951</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The reported transaction involved the withholding of an aggregate 1,256  shares of stock issuable upon the early vesting of an equal number of restricted stock units to pay taxes associated with the reporting person becoming retirement eligible. Of the 1,256 shares, (a) 481 were withheld from the time-based restricted stock units granted 2/18/25, (b) 538 were withheld from the time-based restricted stock units granted 2/15/24, and (c) 237 were withheld from the time-based restricted stock units granted 3/24/23.</footnote>
        <footnote id="F2">The total number of securities beneficially owned includes: (a) 50,829 unrestricted shares; (b) 5,500 unvested units from an award of 16,873 time-based restricted stock units granted 3/24/23; (c) 25,310 unvested performance-based restricted stock units granted 3/24/23; (d) 12,490 unvested units from an award of 19,444 time-based restricted stock units granted 2/15/24; (e) 29,166 unvested performance-based restricted stock units granted 2/15/24; (f) unvested 11,174 time-based restricted stock units granted 2/18/25; and (g) unvested 17,482 performance-based restricted stock units granted 2/18/25.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Benjamin L. Morgan, Attorney in Fact</signatureName>
        <signatureDate>2025-12-15</signatureDate>
    </ownerSignature>
</ownershipDocument>
