Thomson Reuters ONESOURCE

Thomson Reuters ONESOURCE is a modular corporate tax platform used by mid-market and large businesses as well as the advisory firms that support them. The platform spans income tax provision, indirect tax calculation and compliance, transfer pricing documentation, and country-by-country reporting, so tax teams can manage their full obligation in a single environment.

The indirect tax module handles sales and use tax, VAT, and GST rate determination and works alongside major ERP systems. The income tax provision tool automates ASC 740 and IFRS calculations and produces the disclosures needed for audit. A workflow layer tracks due dates, assigns tasks to team members, and keeps sign-off trails for each return.

ONESOURCE connects with SAP, Oracle, and NetSuite via pre-built connectors, and an open API supports custom integrations. The platform targets mid-market to enterprise entities and the accounting firms that handle their tax compliance, not solo practitioners or small bookkeeping shops.

Pricing is entirely sales-led. Thomson Reuters does not publish a price list for ONESOURCE. Firms contact the sales team to scope modules and licensing based on entity count, jurisdictions, and the number of users.