Pat Derdenger

Partner at Lewis Roca Rothgerber Christie LLP

Clients rely on Pat Derdenger for his deep knowledge of state and local tax issues that vitally impact business operations. Serving businesses across industry sectors, Pat understands how to evaluate complex transactions, applying the latest laws and regulations toward obtaining tax benefits and incentives, while reducing tax exposure.

In his extensive state and local tax practice, Pat advises businesses on corporate and individual income, multistate sales and use, and property tax matters, and counsels them on the state and local tax implications of their business transactions. He also represents clients in related litigation matters, from audits and appeals through various administrative states, as well as in federal and state courts and courts of appeals, and the U.S. Tax Court. He has obtained private tax rulings for clients on state and local tax issues and helped draft state tax legislation for clients and industry groups. Pat also advises businesses on the tax implications of various economic incentives and benefits of relocating to and operating in Arizona. In addition, he frequently represents construction industry and homebuilder clients on tax issues related to maintenance, repair, replacement, alteration (MRRA), and modification projects in Arizona.

Pat also counsels clients on federal income and employment tax matters, independent contractor/employee tax issues, responsible officer penalties, information return filing penalties, and federal and state excise taxes, and represents them in related litigation matters. Clients also turn to him for advice on constitutional issues, including the federal commerce clause, due process clause, and equal protection clause.

Frequently described as “the problem solver,” Pat goes far beyond the typical options to find the solution that helps his clients achieve the best possible results. With his open and friendly communication style, Pat views his relationships with his clients as a true partnership.

Pat enjoys road and mountain biking, golfing, USC football, and traveling. He has traveled to each of the seven continents but still has a long list of places he wants to visit.


  • Partner

    Current role