<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>
<periodOfReport>2003-08-28</periodOfReport>
<notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0001051118</issuerCik>
        <issuerName>TENFOLD CORP /UT</issuerName>
        <issuerTradingSymbol>TENF</issuerTradingSymbol>
</issuer>
<reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001262176</rptOwnerCik>
            <rptOwnerName>HARVEY NANCY M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>698 WEST 10000 SOUTH</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 200</rptOwnerStreet2>
            <rptOwnerCity>SOUTH JORDAN</rptOwnerCity>
            <rptOwnerState>UT</rptOwnerState>
            <rptOwnerZipCode>84095</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector>
<isOfficer>1</isOfficer>
<isTenPercentOwner>0</isTenPercentOwner>
<isOther>0</isOther>
<officerTitle>President , CEO, CFO</officerTitle>
<otherText></otherText>
</reportingOwnerRelationship>
</reportingOwner>
<derivativeTable>
<derivativeTransaction>
<securityTitle>
<value>Employee Stock Option (right to buy)</value>
</securityTitle>
<conversionOrExercisePrice>
<value>1.33</value>
</conversionOrExercisePrice>
<transactionDate>
<value>0003-08-28</value>
</transactionDate>
<deemedExecutionDate>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>5</transactionFormType>
<transactionCode>A</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness>
<value>E</value>
</transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>2500000</value>
</transactionShares>
<transactionPricePerShare>
<value>1.33</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<exerciseDate>
<footnoteId id="F1"/>
</exerciseDate>
<expirationDate>
<value>2013-08-28</value>
</expirationDate>
<underlyingSecurity>
<underlyingSecurityTitle>
<value>Common Stock</value>
</underlyingSecurityTitle>
<underlyingSecurityShares>
<value>2500000</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>6050000</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value></value>
</natureOfOwnership>
</ownershipNature>
</derivativeTransaction>
<derivativeTransaction>
<securityTitle>
<value>Employee Stock Option (right to buy)</value>
</securityTitle>
<conversionOrExercisePrice>
<value>1.33</value>
</conversionOrExercisePrice>
<transactionDate>
<value>0003-08-28</value>
</transactionDate>
<deemedExecutionDate>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>5</transactionFormType>
<transactionCode>A</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness>
<value>E</value>
</transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>1250000</value>
</transactionShares>
<transactionPricePerShare>
<value>1.33</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode>
<value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<exerciseDate>
<footnoteId id="F2"/>
</exerciseDate>
<expirationDate>
<value>2013-08-13</value>
</expirationDate>
<underlyingSecurity>
<underlyingSecurityTitle>
<value>Common Stock</value>
</underlyingSecurityTitle>
<underlyingSecurityShares>
<value>1250000</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>7300000</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value></value>
</natureOfOwnership>
</ownershipNature>
</derivativeTransaction>
</derivativeTable>
<footnotes>
<footnote id="F1">The option vests over two years, with 25% on grant date, and remaining 75% vesting equally in semi-annual installments thereafter.</footnote>
<footnote id="F2">The option vests over one year, with 25% vesting on the grant date and the remaining 75% vesting equally in quarterly installments thereafter.</footnote>
</footnotes>
<remarks></remarks>
<ownerSignature>
<signatureName>/s/ Nancy M. Harvey</signatureName>
<signatureDate>2003-08-28</signatureDate>
</ownerSignature>
</ownershipDocument>

