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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2022-08-29</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001728688</issuerCik>
        <issuerName>i3 Verticals, Inc.</issuerName>
        <issuerTradingSymbol>IIIV</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001944618</rptOwnerCik>
            <rptOwnerName>PANAGAKIS PETE</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>40 BURTON HILLS BLVD.</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 415</rptOwnerStreet2>
            <rptOwnerCity>NASHVILLE</rptOwnerCity>
            <rptOwnerState>TN</rptOwnerState>
            <rptOwnerZipCode>37215</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Technology Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <footnotes></footnotes>

    <remarks>Exhibit List: Exhibit 24 Power of Attorney.</remarks>

    <ownerSignature>
        <signatureName>/s/ Paul Maple, Attorney-in-Fact for Pete Panagakis</signatureName>
        <signatureDate>2022-08-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
