onesource determination

Global tax determination software

Calculate accurate Sales, Use, GST, VAT, and Excise tax


Managing indirect tax compliance around the world

Thousands of domestic and multinational corporations count on Thomson Reuters ONESOURCE for the only truly complete indirect tax solution — from research to determination and compliance.

Why choose ONESOURCE Determination

As your business grows, calculating, collecting, and reporting for global tax purposes gets more complicated. You need to accurately report on sales and use tax, goods and services (GST) tax, value-added tax (VAT)  and excise tax – no matter how often the rates or rules change. You also need to plan responses to market disruptors like changing economic nexus rules and tax regulations. Our cloud-based, global, tax determination software allows companies to automate tax calculations on transactions without the headache of managing and maintaining an in-house solution or reporting system. 65% of Fortune 500 companies and multinational corporations have relied on our global tax technology for more than a decade.  As a cloud-native application, our tax automation software minimizes the cost of scaling quickly to meet the needs of a  growing business, without the worry of downtime for updates.

We wanted to use a simple system, a single set of rules that the tax department could control — not IT and not the end user — to make sure that our tax liability was accurate.

What you get with our global tax determination software

Automate tax determination

Automate the calculation of taxes globally with an automated solution for Sales Tax, Use Tax, GST, VAT, and Excise Tax.

Integrate to business systems

Connect to ERP, financial, billing, e-commerce, POS, or payment systems through pre-built or custom integrations.

Trust our tax information

Reduce the risk of audit-triggering mistakes, using our in-house expertise backed by SSAE 18 and ISAE 3402 certified processes.

Customize tax rules and policies

Ensure global tax liability needs are met by creating custom tax rules and policies no matter where business takes you across the globe.

Powerful integrations to ERP and financial applications

  • Seamlessly connect
    Make sales and use tax, GST, VAT, and excise tax calculations and compliance consistent globally across the business. Seamlessly integrate with existing business platforms and applications including ERP, CRM, e-commerce, POS, or other purchasing systems.
  • Standard APIs
    Use standard APIs to connect ONESOURCE Determination to business workflows, applications, or platforms without a complex software implementation.
  • Tailored to you
    Tailor an integration to a specific workflow or processes without disrupting the business.

Integrate with your business systems, while improving the way you manage global transaction tax

We partner with dozens of leading ERP and financial applications

Find yours today

See how it works

Have questions about tax automation? Thomson Reuters has answers. Learn how ONESOURCE Determination simplifies configuring a company structure, setting up tax calculations for global jurisdictions, streamlining tax returns, and more.

Sign up for your free demo

See why Fortune 500 companies have relied on ONESOURCE Determination for more than a decade. Drop us a line and someone from our sales team will walk you through a personalized demo.

Or you can call a regional representative at

+1 888 885 0206