Atty. John M. Campbell
John Campbell practises taxation law, advising clients on domestic and international income tax issues, with a focus on advising Canadian clients with international interests and non-Canadian clients with Canadian interests. John has extensive experience with respect to the tax implications and structuring of corporate reorganizations, mergers and acquisitions, international tax planning and tax planning using trusts.
Profile Summary
About John M. Campbell at a glance
John M. Campbell is a trusts and tax attorney, practicing at Gowling WLG. They have 43+ years of legal experience, licensed to practice since 1983. Admitted to practice in Ontario (1983). Recognitions include Best Lawyers in America — Tax Law (2026) and Best Lawyers in America — Trusts and Estates (2026).
Want to Get Service From This Attorney?
Sign up free and choose one of the two methods below.
Have a legal question? Sign up free, submit it through the Ask the Attorney module and receive a focused answer from a specialist.
- Free to ask a question
- Answers from specialist attorneys
- Optional private / anonymous question
Request an online video meeting or an in-person consultation at the attorney's office. Pick a time that works for you and share the details securely.
- Online video meeting
- In-person at the attorney's office
- Secure messaging and payment
About
- John Campbell practises taxation law, advising clients on domestic and international income tax issues, with a focus on advising Canadian clients with international interests and non-Canadian clients with Canadian interests
- John has extensive experience with respect to the tax implications and structuring of corporate reorganizations, mergers and acquisitions, international tax planning and tax planning using trusts
- He provides his clients with effective, practical tax advice based on his expertise and experience
- John also has many years of experience representing clients in tax disputes with federal and provincial tax authorities, including proposed reassessments and notices of objection
- He has appeared in the Tax Court of Canada, the Federal Court of Appeal, and the Ontario courts on tax appeals
- John has written extensively for various publications and spoken on numerous occasions at conferences on many different aspects of taxation law
Practice Areas Explained
John M. Campbell's Areas of Practice
Each practice area below reflects the types of cases John M. Campbell handles, with a brief overview of what that area of law covers.
John M. Campbell is one of 104,171 trusts attorneys indexed nationally. Browse trusts attorneys →
Tax attorneys handle IRS audits, tax debt, international tax, estate planning, and tax court litigation.
John M. Campbell is one of 85,302 tax attorneys indexed nationally. Browse tax attorneys →
Frequently Asked
Common questions about John M. Campbell
What practice areas does John M. Campbell handle?
How long has John M. Campbell practiced law?
How can I contact John M. Campbell for a consultation?
What awards or recognition has John M. Campbell received?
Practice Areas
Awards
Bar Admissions
Reviews
No reviews yet.