William E. McCarthy

William E. McCarthy is a seasoned attorney and shareholder at Worden Thane PC, based in Missoula, Montana. With over two decades of legal experience, he specializes in estate planning, probate, tax law, and business and corporate matters. Known for his professional demeanor and commitment to client success, he has built a reputation as a trusted legal advisor for individuals, families, and organizations across Montana.

William earned his J.D. from the University of Montana School of Law in 2002. He also attended Montana Tech and The University of Montana, where he gained a strong foundation for his legal career. Since becoming licensed in Montana in 2002, William has also been admitted to practice in the U.S. District Court District of Montana, the U.S. Tax Court, and the U.S. Court of Appeals for the Ninth Circuit.

William delivers strategic, results-focused legal counsel for individuals, families, businesses, and nonprofits. He helps clients protect their assets and plan for the future with comprehensive estate planning and administration services, including customized wills and trusts designed to preserve and transfer wealth. Businesses turn to him for entity formation and compliance, from setting up corporations and LLCs to navigating complex IRS and tax issues. William also represents nonprofit organizations, guiding them through formation, governance, and regulatory compliance to ensure they operate confidently within the law.

William E. McCarthy’s dedication goes beyond client representation. He has contributed significantly to the legal profession through his active involvement in organizations like the State Bar of Montana, the Montana Defense Trial Lawyers, and the Western Montana Bar Association, where he served as past president. His service has earned him recognition, including being named to “Best Lawyers” since 2013 for Business Organization and Corporate Law. He exemplifies professionalism and dedication, making him a vital resource for his clients and community.

Law Office Affiliations

• Shareholder, Worden Thane P.C.
• Member, State Bar of Montana
• Member, Western Montana Bar Association
• Member, Montana Defense Trial Lawyers
• Member, Western MT Low Income Taxpayer Clinic
• Member, BETTR- Section of MT Bar Association

Licensed State

• Montana

Education

• University of Montana School of Law
  Juris Doctor (JD)
• Montana Tech and The University of Montana
  Bachelor of Science (BS)

Awards & Badges