<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2023 Workiva-->
<!--r:bfd77299-16eb-45b2-b432-3758dcd887cb,g:9bd57cff-8d5d-496e-bbf0-fc1bc2649561-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://xbrl.sec.gov/ecd/role/PvpDisclosure" xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2022q4/ecd-2022q4.xsd#PvpDisclosure"/>
  <link:presentationLink xlink:role="http://xbrl.sec.gov/ecd/role/PvpDisclosure" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:href="https://xbrl.sec.gov/ecd/2022q4/ecd-2022q4.xsd#ecd_PayVsPerformanceDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_newt_NonPEONEOTotalCompensationAmount" xlink:href="newt-20230501.xsd#newt_NonPEONEOTotalCompensationAmount"/>
    <link:presentationArc order="30" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_newt_NonPEONEOTotalCompensationAmount" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/label"/>
    <link:loc xlink:type="locator" xlink:label="loc_newt_NonPEONEOCompensationActuallyPaidAmount" xlink:href="newt-20230501.xsd#newt_NonPEONEOCompensationActuallyPaidAmount"/>
    <link:presentationArc order="31" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="loc_newt_NonPEONEOCompensationActuallyPaidAmount" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/label"/>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllAdjToCompMember" xlink:href="https://xbrl.sec.gov/ecd/2022q4/ecd-2022q4.xsd#ecd_AllAdjToCompMember"/>
    <link:loc xlink:type="locator" xlink:label="loc_newt_AdjustmentReportedValueOfEquityAwardsMember" xlink:href="newt-20230501.xsd#newt_AdjustmentReportedValueOfEquityAwardsMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllAdjToCompMember" xlink:to="loc_newt_AdjustmentReportedValueOfEquityAwardsMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/label"/>
    <link:loc xlink:type="locator" xlink:label="loc_newt_AdjustmentYearEndFairValueOfEquityAwardsGrantedUnvestedMember" xlink:href="newt-20230501.xsd#newt_AdjustmentYearEndFairValueOfEquityAwardsGrantedUnvestedMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllAdjToCompMember" xlink:to="loc_newt_AdjustmentYearEndFairValueOfEquityAwardsGrantedUnvestedMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/label"/>
    <link:loc xlink:type="locator" xlink:label="loc_newt_AdjustmentChangeInFairValueOfEquityAwardsGrantedInPriorYearsUnvestedMember" xlink:href="newt-20230501.xsd#newt_AdjustmentChangeInFairValueOfEquityAwardsGrantedInPriorYearsUnvestedMember"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllAdjToCompMember" xlink:to="loc_newt_AdjustmentChangeInFairValueOfEquityAwardsGrantedInPriorYearsUnvestedMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/label"/>
    <link:loc xlink:type="locator" xlink:label="loc_newt_AdjustmentFairValueOfEquityAwardsGrantedVestedMember" xlink:href="newt-20230501.xsd#newt_AdjustmentFairValueOfEquityAwardsGrantedVestedMember"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllAdjToCompMember" xlink:to="loc_newt_AdjustmentFairValueOfEquityAwardsGrantedVestedMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/label"/>
    <link:loc xlink:type="locator" xlink:label="loc_newt_AdjustmentChangeInFairValueOfEquityAwardsGrantedInPriorYearsVestedMember" xlink:href="newt-20230501.xsd#newt_AdjustmentChangeInFairValueOfEquityAwardsGrantedInPriorYearsVestedMember"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllAdjToCompMember" xlink:to="loc_newt_AdjustmentChangeInFairValueOfEquityAwardsGrantedInPriorYearsVestedMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/label"/>
    <link:loc xlink:type="locator" xlink:label="loc_newt_AdjustmentYearEndFairValueOfEquityAwardsGrantedInPriorYearsVestingConditionsFailedMember" xlink:href="newt-20230501.xsd#newt_AdjustmentYearEndFairValueOfEquityAwardsGrantedInPriorYearsVestingConditionsFailedMember"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllAdjToCompMember" xlink:to="loc_newt_AdjustmentYearEndFairValueOfEquityAwardsGrantedInPriorYearsVestingConditionsFailedMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/label"/>
    <link:loc xlink:type="locator" xlink:label="loc_newt_AdjustmentValueOfDividendsOrOtherEarningsPaidOnStockOrOptionAwardsNotOtherwiseReflectedInFairValueOrTotalCompensationMember" xlink:href="newt-20230501.xsd#newt_AdjustmentValueOfDividendsOrOtherEarningsPaidOnStockOrOptionAwardsNotOtherwiseReflectedInFairValueOrTotalCompensationMember"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_ecd_AllAdjToCompMember" xlink:to="loc_newt_AdjustmentValueOfDividendsOrOtherEarningsPaidOnStockOrOptionAwardsNotOtherwiseReflectedInFairValueOrTotalCompensationMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/label"/>
  </link:presentationLink>
</link:linkbase>
