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Welcome to the home for Vertex O Series, the smartest solution for tax departments looking to add more value to their organization. We're bringing tax technology to new levels with the O Series. A set of solutions that combine the latest Internet technologies with 30 years of tax industry expertise.

What's New
Vertex O Series 4.0 Now Available - Explore the latest features and functionality of this revolutionary transaction tax solution.
Vertex Lease Tax O Series - Learn more about Vertex's automated solution that meets the unique needs of the automotive and equipment leasing industry.

Why Switch to O?

  • Smart: O Series maintains an unparalleled database of virtually every rate, rule and taxability category.
  • Centralized Control: Manage multiple subsidiaries and entities from one powerful view.
  • Inevitable: Web services are reshaping the business landscape. Gartner estimates within the next few years 75% of companies will be switching to web services. Will your tax department be ready for the change?

Got questions? O Series has the answers to some common problems facing the modern tax department. Learn More..

Contact us today to make the switch to O Series or spend some more time exploring the benefits of O Series.


We offer two ways to contact us. Simply fill out our web form or call us at 800.355.3500

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