<SEC-DOCUMENT>0001209191-21-049781.txt : 20210804
<SEC-HEADER>0001209191-21-049781.hdr.sgml : 20210804
<ACCEPTANCE-DATETIME>20210804184245
ACCESSION NUMBER:		0001209191-21-049781
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210802
FILED AS OF DATE:		20210804
DATE AS OF CHANGE:		20210804

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Leitch Andrew M
		CENTRAL INDEX KEY:			0001292592

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-50600
		FILM NUMBER:		211145637

	MAIL ADDRESS:	
		STREET 1:		6615 CALLE PONTE BELLA
		CITY:			RANCHO SANTA FE
		STATE:			CA
		ZIP:			92091

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLACKBAUD INC
		CENTRAL INDEX KEY:			0001280058
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		IRS NUMBER:				112617163
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		65 FAIRCHILD STREET
		CITY:			CHARLESTON
		STATE:			SC
		ZIP:			29492
		BUSINESS PHONE:		843-216-6200

	MAIL ADDRESS:	
		STREET 1:		65 FAIRCHILD STREET
		CITY:			CHARLESTON
		STATE:			SC
		ZIP:			29492
</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>2021-08-02</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001280058</issuerCik>
        <issuerName>BLACKBAUD INC</issuerName>
        <issuerTradingSymbol>BLKB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001292592</rptOwnerCik>
            <rptOwnerName>Leitch Andrew M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>65 FAIRCHILD STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CHARLESTON</rptOwnerCity>
            <rptOwnerState>SC</rptOwnerState>
            <rptOwnerZipCode>29492</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</value>
            </securityTitle>
            <transactionDate>
                <value>2021-08-02</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3163</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>31132</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents a restricted stock award, all of which shall vest on August 2, 2022 or, if earlier, immediately prior to the 2022 annual election of directors of the Company, provided that the reporting person is then serving as a director of the Company.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Donald R. Reynolds, Attorney-in-Fact</signatureName>
        <signatureDate>2021-08-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
