Ian	 MacGregor

Ian MacGregor

Counsel, PwC Law LLP

Ian is counsel in the Ottawa office of PwC Law.  His practice focuses on tax dispute resolution and litigation.

Ian has more than 40 years of experience working with clients in both government and the private sector to prevent, manage and resolve tax disputes.  Ian started his legal career with the federal Department of Justice practicing in the fields of civil and tax litigation, where he became the Assistant Deputy Attorney General of the Tax Law Services portfolio that provides all legal advisory and litigation services to the Canada Revenue Agency.  In that capacity, Ian worked closely with senior officials at the Canada Revenue Agency and the Department of Finance to determine strategies, arguments and policies in respect of legal and policy matters including those in litigation.  Subsequent to Justice, Ian joined Osler Hoskin and Harcourt LLP as a partner in its national tax department where his practice focused on litigation and dispute resolution in respect of income tax and GST matters. Throughout his career, Ian has appeared regularly before all levels of court, including the Supreme Court of Canada on several occasions. His current practice focuses on counselling clients as to litigation and settlement strategy, and his mandate includes matters of tax avoidance, transfer pricing, collections and administrative disputes.

Ian was called to the Bar in 1976, received his LLM from Osgoode Hall Law School in 1982, and received his Queens Counsel in 1985.  He has been recognized in The Canadian Lexpert Legal Directory, is a former Governor of the Canadian Tax Foundation, and a former member of the Tax Court of Canada Rules Committee, and Bench and Bar Committee.  Ian has spoken frequently to various organizations, has co-authored a number of articles, and is a sessional professor at the University of Ottawa Law School where he teaches taxation and corporate law.


Dispute resolution relating to income tax, GST, collections and administrative matters Tax litigation – personal and corporate income tax and GST issues at all levels of court.

Contact details

Tel: +1 613 755 5686



  • LLB/LLM Osgoode Hall Law School
  • MA York University
  • MBA McMaster University
  • Level l and ll CICA In-depth tax course