John M. Campbell
Counsel
- Year of Call, Ontario (1983)
Domaines de pratique

Domaines de pratique
John Campbell is counsel in Gowling WLG's Toronto office and a member of the firm's National Tax Group. With over 40 years of experience, John advises clients on a broad range of domestic and international income tax matters, focusing on corporate reorganizations, mergers and acquisitions, international tax planning, and business transactions.
John is known for crafting strategic, practical tax solutions that help businesses navigate complex regulations while achieving their financial goals. He actively works across industries to design tailored tax strategies that drive compliance and enhance financial outcomes.
In addition to his transactional work, John represents clients in disputes with federal and provincial tax authorities. He has successfully appeared before the Tax Court of Canada, the Federal Court of Appeal, and Ontario courts, resolving reassessments, notices of objection, and other tax disputes.
John regularly writes and speaks on key developments in tax law. He has lectured for the Canadian Tax Foundation and the Law Society of Ontario, sharing his extensive knowledge with fellow professionals.
Gowling WLG est un cabinet juridique international constitué des membres de Gowling WLG International Limited, une société à responsabilité limitée par garanties enregistrée en Angleterre, ainsi que leurs affiliés respectifs. Les membres et affiliés constituent des entités autonomes et indépendantes. Gowling WLG International Limited promeut, facilite et coordonne les activités de ses membres, mais ne fournit pas elle-même de services aux clients. Pour en savoir davantage sur notre structure, consultez notre page Avis juridique.
© 2026 Gowling WLG Tous droits réservés