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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-10-15</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001858257</issuerCik>
        <issuerName>AvidXchange Holdings, Inc.</issuerName>
        <issuerTradingSymbol>AVDX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001309469</rptOwnerCik>
            <rptOwnerName>BAIN CAPITAL VENTURE INVESTORS, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 CLARENDON STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001609318</rptOwnerCik>
            <rptOwnerName>BAIN CAPITAL VENTURE COINVESTMENT FUND, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 CLARENDON STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001767193</rptOwnerCik>
            <rptOwnerName>Bain Capital Venture Coinvestment Partners, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 CLARENDON STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001609330</rptOwnerCik>
            <rptOwnerName>BAIN CAPITAL VENTURE FUND 2014, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 CLARENDON STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001767194</rptOwnerCik>
            <rptOwnerName>Bain Capital Venture Partners 2014, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 CLARENDON STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001886184</rptOwnerCik>
            <rptOwnerName>BCV AX Investors, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 CLARENDON STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001408649</rptOwnerCik>
            <rptOwnerName>BCIP Venture Associates</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 CLARENDON STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001408676</rptOwnerCik>
            <rptOwnerName>BCIP VENTURE ASSOCIATES-B</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 CLARENDON STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001295402</rptOwnerCik>
            <rptOwnerName>Salem Enrique T</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O BAIN CAPITAL VENTURE INVESTORS,</rptOwnerStreet1>
            <rptOwnerStreet2>200 CLARENDON STREET</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001708763</rptOwnerCik>
            <rptOwnerName>Agarwal Ajay</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O BAIN CAPITAL VENTURE INVESTORS</rptOwnerStreet1>
            <rptOwnerStreet2>200 CLARENDON STREET</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-10-15</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>23383240</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>23383240</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                    <footnoteId id="F6"/>
                    <footnoteId id="F7"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Series E Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-10-15</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5845810</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>23383240</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                    <footnoteId id="F6"/>
                    <footnoteId id="F7"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Each share of Series E Preferred Stock automatically converted into four shares of Common Stock immediately prior to the closing of the Issuer's initial public offering (the &quot;Conversion&quot;). These shares had no expiration date.</footnote>
        <footnote id="F2">Bain Capital Venture Investors, LLC (&quot;BCVI&quot;) is the general partner of Bain Capital Venture Partners 2014, L.P. (&quot;BCV Partners 2014&quot;), which is the general partner of Bain Capital Venture Fund 2014, L.P. (&quot;BCV Fund 2014&quot;). As a result, BCV Partners 2014 may be deemed to share voting and dispositive power with respect to the securities held by BCV Fund 2014. BCV Partners 2014 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. In the Conversion, the 1,807,597 shares of Series E Preferred Stock held by BCV Fund 2014 automatically converted into 7,230,388 shares of Common Stock.</footnote>
        <footnote id="F3">BCVI is the general partner of Bain Capital Venture Coinvestment Partners, L.P. (&quot;BCV Coinvest Partners&quot;), which is the general partner of Bain Capital Venture Coinvestment Fund, L.P. (&quot;BCV Coinvest Fund&quot;). As a result, BCV Coinvest Partners may be deemed to share voting and dispositive power with respect to the securities held by BCV Coinvest Fund. BCV Coinvest Partners disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. In the Conversion, the 2,437,790 shares of Series E Preferred Stock held by BCV Coinvest Fund automatically converted into 9,751,160 shares of Common Stock.</footnote>
        <footnote id="F4">In the Conversion, the 1,113,487 shares of Series E Preferred Stock held by BCV AX Investors, L.P. (&quot;BCV AX&quot;), whose general partner is BCVI, automatically converted into 4,453,948 shares of Common Stock.</footnote>
        <footnote id="F5">In the Conversion, the 460,899 shares of Series E Preferred Stock held by BCIP Venture Associates (&quot;BCIP Venture&quot;), whose managing partner is Boylston Coinvestors, LLC (&quot;Boylston&quot;), automatically converted into 1,843,596 shares of Common Stock.</footnote>
        <footnote id="F6">In the Conversion, the 26,037 shares of Series E Preferred Stock held by BCIP Venture Associates-B (&quot;BCIP Venture-B&quot; and, together with BCV Fund 2014, BCV Coinvest Fund, BCV AX and BCIP Venture, the &quot;Bain Capital Venture Entities&quot;), whose managing partner is Boylston, automatically converted into 104,148 shares of Common Stock.</footnote>
        <footnote id="F7">The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal. As a result, BCVI and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. BCVI and Messrs. Salem and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Bain Capital Venture Investors, LLC, By: /s/ Matthew C. Harris, Title: Managing Director</signatureName>
        <signatureDate>2021-10-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Bain Capital Venture Fund 2014, L.P., By: Bain Capital Venture Partners 2014, L.P., its general partner, By: Bain Capital Venture Investors, LLC, its general partner, By: /s/ Matthew C. Harris, Title: Managing Director</signatureName>
        <signatureDate>2021-10-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Bain Capital Venture Partners 2014, L.P., By: Bain Capital Venture Investors, LLC, its general partner, By: /s/ Matthew C. Harris, Title: Managing Director</signatureName>
        <signatureDate>2021-10-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Bain Capital Venture Coinvestment Fund, L.P., By: Bain Capital Venture Coinvestment Partners, L.P., its general partner, By: Bain Capital Venture Investors, LLC, its general partner, By: /s/ Matthew C. Harris, Title: Managing Director</signatureName>
        <signatureDate>2021-10-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Bain Capital Venture Coinvestment Partners, L.P., By: Bain Capital Venture Investors, LLC, its general partner, By: /s/ Matthew C. Harris, Title: Managing Director</signatureName>
        <signatureDate>2021-10-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>BCV AX Investors, L.P., By: Bain Capital Venture Investors, LLC, its general partner, By: /s/ Matthew C. Harris, Title: Managing Director</signatureName>
        <signatureDate>2021-10-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>BCIP Venture Associates, By: Boylston Coinvestors, LLC, its managing partner, By: /s/ Matthew C. Harris, Title: Authorized Signatory</signatureName>
        <signatureDate>2021-10-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>BCIP Venture Associates-B, By: Boylston Coinvestors, LLC, its managing partner, By: /s/ Matthew C. Harris, Title: Authorized Signatory</signatureName>
        <signatureDate>2021-10-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Enrique T. Salem</signatureName>
        <signatureDate>2021-10-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Ajay Agarwal</signatureName>
        <signatureDate>2021-10-19</signatureDate>
    </ownerSignature>
</ownershipDocument>
