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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-09-19</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001669162</issuerCik>
        <issuerName>Kinsale Capital Group, Inc.</issuerName>
        <issuerTradingSymbol>KNSL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001534451</rptOwnerCik>
            <rptOwnerName>Russell Frederick L. Jr.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O KINSALE CAPITAL GROUP, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>2221 EDWARD HOLLAND DRIVE, SUITE 600</rptOwnerStreet2>
            <rptOwnerCity>RICHMOND</rptOwnerCity>
            <rptOwnerState>VA</rptOwnerState>
            <rptOwnerZipCode>23230</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, par value $0.01 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2017-09-19</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>27598</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Virginia Capital Private Equity, LP</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The 27,598 shares were transferred as part of an in-kind from Virginia Capital Private Equity, LP to its partners and members. Mr. Russell disclaims beneficial ownership of these shares, in respect of which Mr. Russell does not have a pecuniary interest.</footnote>
        <footnote id="F2">VCP GP LLC is the general partner of Virginia Capital Private Equity, LP. VCP GP LLC is owned by Virginia Capital Partners, LLC. The majority of Virginia Capital Partners, LLC is owned by Goose Creek Partners, LLC and Margin of Safety, LLC, each of which is substantially owned by revocable trusts of which Mr. Russell is the trustee. Mr. Russell is also the manager of VCP GP LLC which manages Virginia Capital Private Equity, LP. Accordingly, Mr. Russell may be deemed to share voting and investment power with respect to all shares of common stock beneficially owned by Virginia Capital Private Equity, LP, as well as those beneficially owned by Margin of Safety, LLC and Goose Creek Partners, LLC. Mr. Russell disclaims beneficial ownership of all shares of common stock held by Virginia Capital Private Equity, LP, Margin of Safety, LLC and Goose Creek Partners, LLC with respect to which Mr. Russell does not have a pecuniary interest therein.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Frederick L. Russell, Jr.</signatureName>
        <signatureDate>2017-09-20</signatureDate>
    </ownerSignature>
</ownershipDocument>
