ONESOURCE Tax Provision vs Orbitax

The verdict at a glance

ONESOURCE Tax Provision scores higher overall (76 to 74), but the right pick depends on what you weight.

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.

Orbitax is an international tax platform for multinational tax departments and advisers that calculates Pillar Two top-up tax, prepares GloBE and local returns, transmits them where authorities allow, produces country-by-country reports and answers cross-border tax questions in 195+ countries.

Quick facts

• ONESOURCE Tax Provision AF score. 76/100
• ONESOURCE Tax Provision implementation. High
• ONESOURCE Tax Provision best fit. Multinationals with SOX close
• Orbitax AF score. 74/100
• Orbitax implementation. Medium
• Orbitax best fit. Multinationals filing Pillar Two

Dimension by dimension

• Compliance depth. ONESOURCE Tax Provision 83, Orbitax 82. Edge: ONESOURCE Tax Provision.
• Scalability. ONESOURCE Tax Provision 80, Orbitax 78. Edge: ONESOURCE Tax Provision.
• AI / agent readiness. ONESOURCE Tax Provision 48, Orbitax 65. Edge: Orbitax.
• Support. ONESOURCE Tax Provision 68, Orbitax 75. Edge: Orbitax.
• Implementation. ONESOURCE Tax Provision 58, Orbitax 76. Edge: Orbitax.
• Pricing transparency. ONESOURCE Tax Provision 30, Orbitax 55. Edge: Orbitax.
• Tax content & coverage. ONESOURCE Tax Provision 86, Orbitax 84. Edge: ONESOURCE Tax Provision.
• Integrations & data flow. ONESOURCE Tax Provision 81, Orbitax 80. Edge: ONESOURCE Tax Provision.

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.

Pick Orbitax if

• A multinational above the EUR 750 million Pillar Two threshold that must file GIRs, notifications and QDMTT returns in many countries with a small tax team.
• A tax department already on ONESOURCE Tax Provision or Longview that wants Pillar Two and country-by-country reporting fed from provision data it has already mapped.
• An advisory firm that wants to keep Pillar Two filing engagements in house, using Firm Edition sub-accounts or single-form Marketplace licenses.

Further reading

• 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)
• GIR amendments for accepted filings (Orbitax, Sep 2026)
• Direct ATO transmission for Australia's combined return (Orbitax, Aug 2026)
• 1,700+ Pillar Two filings in the first season (Orbitax, Jul 2026)

Keep exploring

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

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