ONESOURCE Determination review
A high-capacity global tax engine with broad coverage and contact-sales pricing.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
ONESOURCE Determination is a cloud-based indirect tax engine from Thomson Reuters for growing companies and large corporations. It automates sales, use, GST, VAT, and excise tax calculations across more than 205 countries and territories, with tax content covering more than 60,000 jurisdictions. The product is available through web and API access and is designed for organizations connecting tax calculation to ERP, finance, billing, ecommerce, POS, and payment systems.
Its strongest fit is global transaction processing. Real-time tax rates, rules, and calculations are paired with automatic no-downtime updates, address validation, transaction editors, and exemption certificate management. Pre-built and custom integrations support systems including SAP, Oracle, Microsoft Dynamics, Salesforce, NetSuite, Magento, Stripe, WooCommerce, Workday, and Coupa. ONESOURCE Determination Anywhere adds edge computing, while published capacity reaches up to 10 million transactions per hour. Together, these capabilities suit enterprises that need broad tax coverage and high processing capacity rather than a narrow, single-market calculation tool.
Pricing is handled through a representative, so buyers should plan for a contact-sales process rather than a public self-serve comparison. Thomson Reuters does not publish a public price list or plan-level transaction limits for ONESOURCE Determination, which makes early cost and capacity comparisons less direct. The product is a strong candidate for organizations that need multiple tax types, global jurisdiction coverage, exemption certificate workflows, and major business-system integrations. Companies with limited geographic requirements or simpler tax calculations may prefer a narrower tool with a more transparent buying process.
ONESOURCE Determination pros and cons
- Where it wins
- Covers more than 205 countries and territories
- Supports more than 60,000 global tax jurisdictions
- Handles up to 10 million transactions per hour
- Where it doesn't
- Pricing requires contacting a sales representative
- Plan-level transaction limits are not published
- Its broad scope may exceed narrower domestic tax needs
ONESOURCE Determination fact sheet, pricing and score →
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