<SUBMISSION>
<ACCESSION-NUMBER>0001140361-08-026140
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20080716
<FILING-DATE>20081120
<DATE-OF-FILING-DATE-CHANGE>20081120
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Lenart Deborah
<CIK>0001429300
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>000-23245
<FILM-NUMBER>081203803
</FILING-VALUES>
<BUSINESS-ADDRESS>
<PHONE>(847) 781-3600
</BUSINESS-ADDRESS>
<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>1116
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>2895 GREENSPOINT
<STREET2>SUITE 600
<CITY>HOFFMAN ESTATES
<STATE>IL
<ZIP>60195
<PHONE>8477813600
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>2800 WEST HIGGINS ROAD
<STREET2>SUITE 790
<CITY>HOFFMAN ESTATES
<STATE>IL
<ZIP>60195
</MAIL-ADDRESS>
</ISSUER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-07-16</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001429300</rptOwnerCik>
            <rptOwnerName>Lenart Deborah</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>SVP University</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2008-07-16</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>5</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>352.2560</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>12.42</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>28202.256</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Acquired under the Company's Employee Stock Purchase Plan, a Section 423 plan exempt from 16(b)of the Securities and Exchange Act of 1934 pursuant to Rule 16b-3(c) of the Act.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/Deborah L. Lenart</signatureName>
        <signatureDate>2008-11-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
