<SEC-DOCUMENT>0001209191-19-011260.txt : 20190219
<SEC-HEADER>0001209191-19-011260.hdr.sgml : 20190219
<ACCEPTANCE-DATETIME>20190219174221
ACCESSION NUMBER:		0001209191-19-011260
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190218
FILED AS OF DATE:		20190219
DATE AS OF CHANGE:		20190219

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			McCreary Lynn S.
		CENTRAL INDEX KEY:			0001582646

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-14948
		FILM NUMBER:		19616311

	MAIL ADDRESS:	
		STREET 1:		255 FISERV DRIVE
		CITY:			BROOKFIELD
		STATE:			WI
		ZIP:			53045

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FISERV INC
		CENTRAL INDEX KEY:			0000798354
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROCESSING & DATA PREPARATION [7374]
		IRS NUMBER:				391506125
		STATE OF INCORPORATION:			WI
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		255 FISERV DR
		STREET 2:		PO BOX 979
		CITY:			BROOKFIELD
		STATE:			WI
		ZIP:			53045
		BUSINESS PHONE:		4148795000

	MAIL ADDRESS:	
		STREET 1:		255 FISERV DRIVE
		CITY:			BROOKFIELD
		STATE:			WI
		ZIP:			53045
</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>2019-02-18</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000798354</issuerCik>
        <issuerName>FISERV INC</issuerName>
        <issuerTradingSymbol>FISV</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001582646</rptOwnerCik>
            <rptOwnerName>McCreary Lynn S.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>255 FISERV DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BROOKFIELD</rptOwnerCity>
            <rptOwnerState>WI</rptOwnerState>
            <rptOwnerZipCode>53045</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Legal Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2019-02-18</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1054</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>85.78</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>43138</value>
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                    <footnoteId id="F3"/>
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                <directOrIndirectOwnership>
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    <derivativeTable>
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            <exerciseDate>
                <value>2019-02-21</value>
                <footnoteId id="F4"/>
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            <expirationDate>
                <value>2028-02-21</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
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            </underlyingSecurity>
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                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2018-02-22</value>
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            <expirationDate>
                <value>2027-02-22</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
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                </underlyingSecurityTitle>
                <underlyingSecurityShares>
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        <derivativeHolding>
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                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
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                <footnoteId id="F3"/>
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            <exerciseDate>
                <value>2016-02-18</value>
            </exerciseDate>
            <expirationDate>
                <value>2025-02-18</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
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                    <footnoteId id="F3"/>
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            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
                    <value>29504</value>
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                    <value>D</value>
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        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>28.49</value>
                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2015-02-19</value>
            </exerciseDate>
            <expirationDate>
                <value>2024-02-19</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>21310</value>
                    <footnoteId id="F3"/>
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            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>21310</value>
                </sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>20.18</value>
                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2014-02-20</value>
            </exerciseDate>
            <expirationDate>
                <value>2023-02-20</value>
            </expirationDate>
            <underlyingSecurity>
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                </underlyingSecurityTitle>
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                    <footnoteId id="F3"/>
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                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2013-02-22</value>
            </exerciseDate>
            <expirationDate>
                <value>2022-02-22</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
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                <underlyingSecurityShares>
                    <value>19496</value>
                    <footnoteId id="F3"/>
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            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
                    <value>19496</value>
                </sharesOwnedFollowingTransaction>
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                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
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                <footnoteId id="F3"/>
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            <exerciseDate>
                <value>2012-02-23</value>
            </exerciseDate>
            <expirationDate>
                <value>2021-02-23</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
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                    <value>17560</value>
                </sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
                    <value>D</value>
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        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>12.68</value>
                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2011-03-15</value>
            </exerciseDate>
            <expirationDate>
                <value>2020-03-15</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>18000</value>
                    <footnoteId id="F3"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>18000</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Reflects payment of tax liability by withholding securities incident to vesting of restricted stock units.</footnote>
        <footnote id="F2">Includes 350 shares acquired under the Fiserv, Inc. Employee Stock Purchase Plan.</footnote>
        <footnote id="F3">Adjusted to reflect the two-for-one split of Fiserv, Inc. common stock distributed on March 19, 2018 to holders of record on March 5, 2018.</footnote>
        <footnote id="F4">One-third of these options vest on each anniversary of the grant date.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Lynn S. McCreary</signatureName>
        <signatureDate>2019-02-19</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
