Longview Tax vs ONESOURCE Tax Provision

The verdict at a glance

ONESOURCE Tax Provision scores higher overall (76 to 73), but the right pick depends on what you weight.

Longview Tax is insightsoftware's income tax provision and reporting platform for corporate tax departments at multinationals, calculating current and deferred tax under ASC 740 or IAS 12 with ETR forecasting, state-level provision, Pillar Two and country-by-country reporting.

ONESOURCE Tax Provision is Thomson Reuters' ASC 740 and IFRS income tax provision software for corporate tax departments at upper mid-size and multinational companies, calculating current and deferred tax, the rate reconciliation and journal entries.

Quick facts

• Longview Tax AF score. 73/100
• Longview Tax implementation. Medium
• Longview Tax best fit. Multinationals on IFRS or US GAAP
• ONESOURCE Tax Provision AF score. 76/100
• ONESOURCE Tax Provision implementation. High
• ONESOURCE Tax Provision best fit. Multinationals with SOX close

Dimension by dimension

• Compliance depth. Longview Tax 80, ONESOURCE Tax Provision 83. Edge: ONESOURCE Tax Provision.
• Scalability. Longview Tax 78, ONESOURCE Tax Provision 80. Edge: ONESOURCE Tax Provision.
• AI / agent readiness. Longview Tax 50, ONESOURCE Tax Provision 48. Edge: Longview Tax.
• Support. Longview Tax 70, ONESOURCE Tax Provision 68. Edge: Longview Tax.
• Implementation. Longview Tax 73, ONESOURCE Tax Provision 58. Edge: Longview Tax.
• Pricing transparency. Longview Tax 32, ONESOURCE Tax Provision 30. Edge: Longview Tax.
• Tax content & coverage. Longview Tax 83, ONESOURCE Tax Provision 86. Edge: ONESOURCE Tax Provision.
• Integrations & data flow. Longview Tax 76, ONESOURCE Tax Provision 81. Edge: ONESOURCE Tax Provision.

Pick Longview Tax if

• A multinational reporting under IFRS or US GAAP that wants provision, ETR forecasting, CbCR and Pillar Two estimates on one data set
• A tax department with a capable in-house administrator that wants to own configuration without leaning on IT or consultants
• A Canadian or US group that needs state-by-state provision or the EIFEL interest limitation inside the provision workflow

Pick ONESOURCE Tax Provision if

• A public multinational with dozens of legal entities, several currencies and a SOX-tested quarterly provision that still runs on Excel workbooks.
• A tax department already on ONESOURCE Income Tax that wants provision data to flow into the return without rekeying.
• An SAP S/4HANA shop that wants trial balances pulled into the provision and tax journal entries posted back automatically.

Further reading

• insightsoftware reorganizes into Lineos, Certent and Simba brands (Longview Tax, Sep 2026)
• Longview 26.3 adds Lineos AI to the Excel add-in and public CbCR (Longview Tax, Jul 2026)
• Software and Services Agreement updated (Longview Tax, Jun 2026)
• Short AMERS outage (ONESOURCE Tax Provision, Sep 2026)
• Orbitax Pillar Two workflow promoted alongside the provision (ONESOURCE Tax Provision, Aug 2026)
• Jurisdiction-level bridge mapping and faster bridge imports (ONESOURCE Tax Provision, Mar 2026)

Keep exploring

• The full Longview Tax review: scores, pricing, and where it fits.
• The full ONESOURCE Tax Provision review: scores, pricing, and where it fits.
• Bloomberg Tax Provision vs ONESOURCE Tax Provision
• Bloomberg Tax Workpapers vs ONESOURCE Tax Provision
• CSC Corptax vs Longview Tax
• Longview Tax vs Oracle Cloud EPM Tax Reporting

Both reviews are updated on a rolling cycle by our research agents.