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Proc-Type: 2001,MIC-CLEAR
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<SEC-DOCUMENT>0001179881-04-000012.txt : 20040728
<SEC-HEADER>0001179881-04-000012.hdr.sgml : 20040728
<ACCEPTANCE-DATETIME>20040727142324
ACCESSION NUMBER:		0001179881-04-000012
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040724
FILED AS OF DATE:		20040727

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ELWARD THOMAS W
		CENTRAL INDEX KEY:			0001179881

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-09513
		FILM NUMBER:		04933105

	BUSINESS ADDRESS:	
		STREET 1:		FAIRLANE PLZ SOUTH
		STREET 2:		330 TOWN CTR DR STE 1100
		CITY:			DEARBORN
		STATE:			MI
		ZIP:			48126
		BUSINESS PHONE:		3139829354

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CMS ENERGY CORP
		CENTRAL INDEX KEY:			0000811156
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC & OTHER SERVICES COMBINED [4931]
		IRS NUMBER:				382726431
		STATE OF INCORPORATION:			MI
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE ENERGY PLAZA
		CITY:			JACKSON
		STATE:			MI
		ZIP:			49201
		BUSINESS PHONE:		5177881031

	MAIL ADDRESS:	
		STREET 1:		ONE ENERGY PLAZA
		CITY:			JACKSON
		STATE:			MI
		ZIP:			49201
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-07-24</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000811156</issuerCik>
        <issuerName>CMS ENERGY CORP</issuerName>
        <issuerTradingSymbol>CMS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001179881</rptOwnerCik>
            <rptOwnerName>ELWARD THOMAS W</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>CMS ENERGY CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>ONE ENERGY PLAZA</rptOwnerStreet2>
            <rptOwnerCity>JACKSON</rptOwnerCity>
            <rptOwnerState>MI</rptOwnerState>
            <rptOwnerZipCode>49201</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Pres/COO-CMS Enterprises Co</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock (CMS)</value>
            </securityTitle>
            <transactionDate>
                <value>2004-07-24</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>772</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>8.83</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>33915</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock (CMS)</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>6979</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>401(k)</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Total includes 32,228 shares of Restricted Stock of which 3,000 shares are nominal.  (The actual number of nominal shares received will be determined by the passage of time and the achievement of performance objectives under CMS Energy Corporation's Performance Incentive Stock Plan.)</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/MDVanHemert, Attny in Fact</signatureName>
        <signatureDate>2004-07-27</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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