<SUBMISSION>
<ACCESSION-NUMBER>0001065949-16-000320
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20151222
<FILING-DATE>20160108
<DATE-OF-FILING-DATE-CHANGE>20160108
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>30DC, INC.
<CIK>0001118974
<ASSIGNED-SIC>8200
<IRS-NUMBER>161675285
<STATE-OF-INCORPORATION>MD
<FISCAL-YEAR-END>0630
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>80 BROAD STREET
<STREET2>5TH FLOOR
<CITY>NEW YORK
<STATE>NY
<ZIP>10004
<PHONE>2129624400
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>80 BROAD STREET
<STREET2>5TH FLOOR
<CITY>NEW YORK
<STATE>NY
<ZIP>10004
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>INFINITY CAPITAL GROUP, INC.
<DATE-CHANGED>20050503
</FORMER-COMPANY>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>FAYBER GROUP INC
<DATE-CHANGED>20000914
</FORMER-COMPANY>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>LABORDE GREGORY H
<CIK>0001114730
<STATE-OF-INCORPORATION>MD
<FISCAL-YEAR-END>1231
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>000-30999
<FILM-NUMBER>161332293
</FILING-VALUES>
<MAIL-ADDRESS>
<STREET1>255 WARREN STREET
<STREET2>SUITE 1504
<CITY>JERSEY CITY
<STATE>NJ
<ZIP>07302
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2015-12-22</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001118974</issuerCik>
        <issuerName>30DC, INC.</issuerName>
        <issuerTradingSymbol>TDCH</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001114730</rptOwnerCik>
            <rptOwnerName>LABORDE GREGORY H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1688 MERIDIAN AVE., STE 500A</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MIAMI BEACH</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33139</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>2015-12-22</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>300000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3807250</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">These shares were issued pursuant to a contract for services between the Issuer and 21st Century Digital Media, Inc., for which the Reporting Person is the beneficial owner.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Gregory H. Laborde</signatureName>
        <signatureDate>2016-01-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
