Michael Porter has more than 30 years of state and local tax experience, with a particular emphasis on Massachusetts tax issues.

Practice Focus

Michael Porter has more than 30 years of state and local tax experience, with a particular emphasis on Massachusetts tax issues. He advises clients on state income and sales and use tax matters, including contesting state tax assessments at the Massachusetts Appellate Tax Board and through all levels of the administrative appeal process. He also provides clients with general state tax advice.

Before joining Hemenway & Barnes, Mr. Porter led Deloitte’s Multistate Tax Practice in Boston and worked with the firm’s Washington National Tax Office. He was responsible for state tax implications associated with tax opinions, transactions, and restructurings. Prior thereto, Mr. Porter was a national partner at Arthur Andersen. He has also served as Deputy General Counsel at the Massachusetts Department of Revenue.

Representative Clients

  • Represented many corporations and individuals in resolving contested state tax assessments, including companies in the utility, biotechnology, medical, and technology industries.
  • Consulted with corporate and individual clients concerning a wide variety of state tax matters, including combined reporting, sales taxes, manufacturing status, transactions and domicile/residency.
"State tax laws and regulations are often nuanced and complex, posing potential pitfalls for the uninformed. Proactively addressing potential state tax implications is crucial to allow for strategic planning and informed decision-making."
— Michael Porter’s Comments on State Tax Law

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