<SUBMISSION>
<ACCESSION-NUMBER>0001046568-09-000002
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20090630
<FILING-DATE>20090804
<DATE-OF-FILING-DATE-CHANGE>20090804
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Gray Donna L
<CIK>0001435458
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>000-23245
<FILM-NUMBER>09983023
</FILING-VALUES>
<MAIL-ADDRESS>
<STREET1>CAREER EDUCATION CORPORATION
<STREET2>2895 GREENSPOINT PARKWAY, SUITE 600
<CITY>HOFFMAN ESTATES
<STATE>IL
<ZIP>60169
</MAIL-ADDRESS>
</REPORTING-OWNER>
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>CAREER EDUCATION CORP
<CIK>0001046568
<ASSIGNED-SIC>8200
<IRS-NUMBER>363932190
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>2895 GREENSPOINT
<STREET2>SUITE 600
<CITY>HOFFMAN ESTATES
<STATE>IL
<ZIP>60169
<PHONE>8477813600
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>2895 GREENSPOINT PARKWAY
<STREET2>SUITE 600
<CITY>HOFFMAN ESTATES
<STATE>IL
<ZIP>60169
</MAIL-ADDRESS>
</ISSUER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2009-06-30</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001046568</issuerCik>
        <issuerName>CAREER EDUCATION CORP</issuerName>
        <issuerTradingSymbol>CECO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001435458</rptOwnerCik>
            <rptOwnerName>Gray Donna L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>CAREER EDUCATION CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>2895 GREENSPOINT PARKWAY, SUITE 600</rptOwnerStreet2>
            <rptOwnerCity>HOFFMAN ESTATES</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60169</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Senior VP</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2009-06-30</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>20.793</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>21.16</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>12630.3419</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2009-08-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>295</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>22.92</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>12335.3419</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Acquired under the Company's Employee Stock Purchase Plan, a Section 423 Plan exempt from Section 16(b) of the Securities and Exchange Act of 1934 pursuant to Rule 16b-3(c) of that Act.</footnote>
        <footnote id="F2">Reflects shares of common stock surrendered to the company to satisfy tax withholding obligations in connection with vesting of restricted stock.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Gail B. Rago pursuant to Power of Attorney for Donna L. Gray</signatureName>
        <signatureDate>2009-08-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
