<SEC-DOCUMENT>0001209191-20-058768.txt : 20201117
<SEC-HEADER>0001209191-20-058768.hdr.sgml : 20201117
<ACCEPTANCE-DATETIME>20201117170218
ACCESSION NUMBER:		0001209191-20-058768
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20201115
FILED AS OF DATE:		20201117
DATE AS OF CHANGE:		20201117

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Dean Matthew
		CENTRAL INDEX KEY:			0001761198

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-26926
		FILM NUMBER:		201321888

	MAIL ADDRESS:	
		STREET 1:		101 LEDGESTONE WAY
		CITY:			GREER
		STATE:			SC
		ZIP:			29651

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SCANSOURCE, INC.
		CENTRAL INDEX KEY:			0000918965
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-COMPUTER & PERIPHERAL EQUIPMENT & SOFTWARE [5045]
		IRS NUMBER:				570965380
		STATE OF INCORPORATION:			SC
		FISCAL YEAR END:			0630

	BUSINESS ADDRESS:	
		STREET 1:		6 LOGUE COURT
		CITY:			GREENVILLE
		STATE:			SC
		ZIP:			29615
		BUSINESS PHONE:		8642882432

	MAIL ADDRESS:	
		STREET 1:		6 LOGUE COURT
		CITY:			GREENVILLE
		STATE:			SC
		ZIP:			29615

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SCANSOURCE INC
		DATE OF NAME CHANGE:	19940214
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-11-15</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000918965</issuerCik>
        <issuerName>SCANSOURCE, INC.</issuerName>
        <issuerTradingSymbol>SCSC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001761198</rptOwnerCik>
            <rptOwnerName>Dean Matthew</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>101 LEDGESTONE WAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>GREER</rptOwnerCity>
            <rptOwnerState>SC</rptOwnerState>
            <rptOwnerZipCode>29651</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP and General Counsel</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-11-15</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>643</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>25.22</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>11071</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Reflects shares withheld in satisfaction of tax withholding obligations upon vesting of restricted stock units. This is a non-market transaction.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ J. Creighton Lynes, attorney-in-fact</signatureName>
        <signatureDate>2020-11-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
