2158548958 Charles L. Mastin, II

Charles L. Mastin, II

Charles L. Mastin II
chuck@mastinlaw.com / (303) 217-4876

Mr. Mastin’s practice focuses on providing clients with innovative tax advice for corporate and partnership transactions, entity formations, business planning and estate planning and administration. He is known as one of the top Colorado attorneys representing dentists and dental specialists based on his extensive experience representing these professionals in the formation, acquisition, sale, and dissolution of dental practices and dental practice groups. Mr. Mastin also regularly represents taxpayers before the Internal Revenue Service (IRS) and state administrative agencies.

He specializes in the areas of business and taxation, assisting businesses and individuals with all their tax and corporate needs. From selecting and forming the correct organizational structure, drafting corporate documents, negotiating and drafting Buy-Sell Agreements, Asset Purchase Agreements, Non-Competition Agreements, business planning, and rendering legal opinions in support of business transactions, Mr. Mastin combines the knowledge of both the business and tax disciplines.

Mr. Mastin regularly assists clients with the preparation and filing of business and individual tax returns, structuring tax advantaged transactions, filing for ruling requests, and representing clients before the IRS. He also provides businesses of all sizes with innovative tax advice, and also helps individuals with developing tax and estate plans, focusing on estate plans that preserve assets by minimizing estate taxes and ensuring death transfers that are made according to client wishes.

Professional Experience

  • Mastin Bergstrom LLC (formerly Mastin Law Firm, P.C.), Partner 2006 – Present
  • Montgomery Little & McGrew LLP, Shareholder 2004 – 2006
  • Ritchey May & Company, LLP, Tax Director 2002 – 2004
  • Arthur Andersen, LLP, Senior Tax Manager 2001 – 2002
  • Rothgerber Johnson & Lyons LLP, Tax Attorney 1995 – 2001
  • KPMG LLP, Staff, Manager, Senior Manager, CPA, 1986 – 1995

Representative Cases

      • Metrocorp, Inc. v. Commissioner, 116 T.C. 18 (2001) (successful taxpayer resolution regarding insurance payments relating to an asset acquisition).


        • Underwater Stock Options: Considerations Whether to Bail Out – or Not , The Colorado Lawyer, Vol. 30, No. 12 (December, 2001) (with Nathaniel T. Trelease).