<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2009-11-13</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000832767</issuerCik>
        <issuerName>PHOENIX TECHNOLOGIES LTD</issuerName>
        <issuerTradingSymbol>PTEC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001475770</rptOwnerCik>
            <rptOwnerName>Ramius LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>599 LEXINGTON AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001418492</rptOwnerCik>
            <rptOwnerName>RAMIUS ENTERPRISE MASTER FUND LTD</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>CITCO FUND SERVICES LIMITED,</rptOwnerStreet1>
            <rptOwnerStreet2>CORPORATE CENTER, WEST BAY ROAD</rptOwnerStreet2>
            <rptOwnerCity>GRAND CAYMAN</rptOwnerCity>
            <rptOwnerState>E9</rptOwnerState>
            <rptOwnerZipCode>KY1-1205</rptOwnerZipCode>
            <rptOwnerStateDescription>CAYMAN ISLANDS</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001373638</rptOwnerCik>
            <rptOwnerName>RAMIUS VALUE &amp; OPPORTUNITY MASTER FUND LTD</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>CITCO FUND SERVICES LIMITED,</rptOwnerStreet1>
            <rptOwnerStreet2>CORPORATE CENTER, WEST BAY ROAD</rptOwnerStreet2>
            <rptOwnerCity>GRAND CAYMAN</rptOwnerCity>
            <rptOwnerState>E9</rptOwnerState>
            <rptOwnerZipCode>KY1-1205</rptOwnerZipCode>
            <rptOwnerStateDescription>CAYMAN ISLANDS</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
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            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001401165</rptOwnerCik>
            <rptOwnerName>RCG PB, Ltd</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>CITCO FUND SERVICES LIMITED,</rptOwnerStreet1>
            <rptOwnerStreet2>CORPORATE CENTER, WEST BAY ROAD</rptOwnerStreet2>
            <rptOwnerCity>GRAND CAYMAN</rptOwnerCity>
            <rptOwnerState>E9</rptOwnerState>
            <rptOwnerZipCode>KY1-1205</rptOwnerZipCode>
            <rptOwnerStateDescription>CAYMAN ISLANDS</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001329989</rptOwnerCik>
            <rptOwnerName>RCG STARBOARD ADVISORS, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O RAMIUS LLC,</rptOwnerStreet1>
            <rptOwnerStreet2>599 LEXINGTON AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001275893</rptOwnerCik>
            <rptOwnerName>RAMIUS ADVISORS LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O RAMIUS LLC,</rptOwnerStreet1>
            <rptOwnerStreet2>599 LEXINGTON AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
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            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

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                    <value>1852238</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By RCG PB, Ltd</value>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, $0.001 Par Value</value>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </securityTitle>
            <transactionDate>
                <value>2009-11-16</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1304</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.7993</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1853542</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By RCG PB, Ltd</value>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. To enable all of the Reporting Persons to gain access to the Securities and Exchange Commission's electronic filing system (which only accepts a maximum of 10 joint filers per report), this report is the first of two identical reports relating to the same transaction being filed with the Securities and Exchange Commission.</footnote>
        <footnote id="F2">Each Reporting Person (other than Ramius Enterprise Master Fund Ltd, Ramius Value and Opportunity Master Fund Ltd and RCG PB, Ltd) disclaims beneficial ownership of the shares of Common Stock reported herein except to the extent of its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such shares of Common Stock for purposes of Section 16 or for any other purpose.</footnote>
        <footnote id="F3">Shares of Common Stock beneficially owned by Enterprise Master Fund Ltd (Enterprise Master Fund). Ramius Advisors, LLC (Ramius Advisors), as the investment advisor of Enterprise Master Fund, may be deemed to beneficially own the shares of Common Stock beneficially owned by Enterprise Master Fund. Ramius LLC (Ramius), as the sole member of Ramius Advisors, may be deemed to beneficially own the shares of Common Stock beneficially owned by Enterprise Master Fund.</footnote>
        <footnote id="F4">Shares of Common Stock beneficially owned by Ramius Value and Opportunity Master Fund Ltd (Value and Opportunity Master Fund). As the investment manager of Value and Opportunity Master Fund, RCG Starboard Advisors may be deemed to beneficially own the shares of Common Stock beneficially owned by Value and Opportunity Master Fund. Ramius, as the sole member of RCG Starboard Advisors, may be deemed to beneficially own the shares of Common Stock beneficially owned by Value and Opportunity Master Fund.</footnote>
        <footnote id="F5">Shares of Common Stock beneficially owned by RCG PB, Ltd (RCG PB). Ramius Advisors, as the investment advisor of RCG PB, may be deemed to beneficially own the shares of Common Stock beneficially owned by RCG PB. Ramius, as the sole member of Ramius Advisors, may be deemed to beneficially own the shares of Common Stock beneficially owned by RCG PB.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Owen S. Littman, Authorized Signatory</signatureName>
        <signatureDate>2009-11-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Owen S. Littman, Authorized Signatory</signatureName>
        <signatureDate>2009-11-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Owen S. Littman, Authorized Signatory</signatureName>
        <signatureDate>2009-11-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Owen S. Littman, Authorized Signatory</signatureName>
        <signatureDate>2009-11-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Owen S. Littman, Authorized Signatory</signatureName>
        <signatureDate>2009-11-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Owen S. Littman, Authorized Signatory</signatureName>
        <signatureDate>2009-11-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
