ADP has acquired MasterTax LLC and MasterTax Services, expanding the payroll giant’s array of payroll tax and compliance services.

Terms of the transaction were not disclosed. Based in Scottsdale, Ariz., MasterTax provides Fortune 1000 companies and other clients with payroll tax and compliance services covering more than 10,000 tax jurisdictions in the U.S. and Canada. MasterTax’s services range from the in-house deployment of tax filing software to the outsourcing of the payroll tax function through MasterTax Services. The company was founded in 1997 and is used by large, multinational companies, as well as a wide array of payroll service providers and professional employer organizations.

“Going forward, we are convinced that MasterTax will be better positioned to thrive and realize its full future growth potential as part of ADP, a world-class organization with tremendous scale, assets and synergistic expertise in the payroll tax and compliance arena,” said MasterTax president Richard Warneka in a statement.

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