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SPECIFICTION
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ONESOURCE Tax Provision

tax.thomsonreuters.com

WebAPI
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Spec score 7.1 #10 of 16 in Tax Provision Software

What it is

ONESOURCE Tax Provision automates corporate tax estimates and supports financial close and defensible reporting. Its calculation engine creates tax entries automatically for complex tax scenarios and can handle attributes such as net operating losses and valuation allowances. The product covers current and deferred provision work, rate reconciliation, and provision-to-return. Reporting includes industry-standard and custom reports, application-wide filtering, and drill-down from consolidated amounts to entity-level detail. Configurable journal entries connect it with ERP systems across jurisdictional levels. Microsoft Excel Workpapers can exchange data in both directions. The software collects structured and unstructured data from multiple sources, extracts information for other applications, and provides APIs for imports and exports, including scheduled or triggered imports. The web-based Global Access add-on lets colleagues enter information from any location with local language and currency support. It also provides configurable controls, permissions, and sign-offs. Thomson Reuters describes the output as auditable and audit-ready. ONESOURCE University offers training packages, workshops, WebSeminars, courses, and certifications. The product is presented for upper-mid-sized corporations, multinational enterprises, and enterprise corporations. Pricing is available by contacting sales.

Spec sheet

Purpose
Automates corporate tax estimates and streamlines the financial close for defensible reporting.Read 4 Oct 2026 · tax.thomsonreuters.com
API
ONESOURCE Tax Provision APIs support importing and exporting data, including scheduled or triggered imports.Read 4 Oct 2026 · tax.thomsonreuters.com
Access controls
The Global Access add-on supports configurable controls, permissions, and sign-offs.Read 4 Oct 2026 · tax.thomsonreuters.com
Audit readiness
Thomson Reuters describes the product as producing auditable reports and audit-ready results.Read 4 Oct 2026 · tax.thomsonreuters.com
Calculation engine
Its calculation engine generates tax entries automatically and is designed to handle complex tax scenarios.Read 4 Oct 2026 · tax.thomsonreuters.com
Data handling
It can manage multiple data sources, collect structured and unstructured data, and extract data for use in other applications.Read 4 Oct 2026 · tax.thomsonreuters.com
ERP integration
It integrates with ERP systems using configurable journal entries across jurisdictional levels.Read 4 Oct 2026 · tax.thomsonreuters.com
Excel integration
It connects to Microsoft Excel Workpapers and supports pushing and pulling data in both directions.Read 4 Oct 2026 · tax.thomsonreuters.com
Intended customers
The product is presented for upper-mid-sized corporations, multinational enterprises, and enterprise corporations.Read 4 Oct 2026 · tax.thomsonreuters.com
Reporting
It provides industry-standard reports, drill-down from consolidated amounts to entity-level detail, custom reports, and application-wide filtering.Read 4 Oct 2026 · tax.thomsonreuters.com
Support and training
ONESOURCE University offers Tax Provision training packages, workshops, WebSeminars, courses, and certifications.Read 4 Oct 2026 · tax.thomsonreuters.com
Tax attributes
The software can automate tax attributes such as net operating losses and valuation allowances.Read 4 Oct 2026 · tax.thomsonreuters.com
Web data collection
The web-based Global Access add-on lets colleagues enter information into the Tax Provision database from any location, with local language and currency support.Read 4 Oct 2026 · tax.thomsonreuters.com

Plans and prices

ONESOURCE Tax Provision Priced on request Pricing available by contacting sales Read 4 Oct 2026 · tax.thomsonreuters.com

Every ONESOURCE Tax Provision plan and price →

Strong points and limits

Strong points

  • Automates tax entries and tax attributes
  • Current and deferred provision support
  • ERP and two-way Excel integration
  • APIs support scheduled or triggered imports
  • Configurable permissions, controls, and sign-offs

Limits

  • Pricing is available only by contacting sales
  • Global Access is an add-on
  • Designed for upper-mid-sized and enterprise organizations

Who it suits

ONESOURCE Tax Provision is intended for upper-mid-sized, multinational, and enterprise corporations managing current and deferred tax provisions. It suits teams needing ERP, Excel, API, reporting, and audit workflows.

Verdict

ONESOURCE Tax Provision combines tax calculations, reporting, integrations, data collection, and audit controls for corporate provision work. Its broad workflows target larger organizations, with pricing and Global Access details requiring a sales conversation.

Where Specifiction places it

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