John O'Connor

John O'Connor

Tax Law
Recognized in Best Attorney USA since 2021

About John

John O'Connor is a partner and Co-Head in the Tax Group in Toronto. John's practice involves all areas of corporate tax, focusing primarily on complex mergers, acquisitions and reorganizations, along with advising tax-exempt entities. In addition, John regularly consults on a variety of technical tax matters.

John O'Connor is a partner and Co-Head in the Tax Group in Toronto. John's practice involves all areas of corporate tax, focusing primarily on complex mergers, acquisitions and reorganizations, along with advising tax-exempt entities. In addition, John regularly consults on a variety of technical tax matters.

John O'Connor is a partner and Co-Head in the Tax Group in Toronto. John's practice involves all areas of corporate tax, focusing primarily on complex mergers, acquisitions and reorganizations, along with advising tax-exempt entities. In addition, John regularly consults on a variety of technical tax matters.

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Reviews

4.5 / 5

39 Reviews

1,044 Profile Views

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Amos Stark

Feb 04, 2026

Top notch experts in Toronto - John O'Connor is by far the best lawyer I've ever had

John O'Connor is fantastic and very professional. Don't hesitate to hire them if you're in Ontario and need help. They really know their stuff and will go the extra mile to make sure you're taken care...

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Kelli Kutch

Feb 04, 2026

Many thanks to John O'Connor for the hard work and dedication to my legal matter

Super helpful and professional staff at John O'Connor's office. Thanks again for everything you did for me! It was a long journey, but you made it much easier with your constant support and legal expe...

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Hugo Johns-Rosenbaum

Feb 04, 2026

Top notch experts in Toronto - John O'Connor is by far the best lawyer I've ever had

If you need a Tax Law lawyer, John O'Connor is the one to call. Great job and very responsive team. They kept me in the loop and always had time to explain the details of my case. I felt like I was in...

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Guy Wiegand-Ortiz

Feb 04, 2026

Highly recommend John O'Connor for anyone needing expert Tax Law help in Ontario

Honestly, I can't thank John O'Connor enough for everything they've done for me. They really know their stuff when it comes to Tax Law and it shows in the results. 10/10 would recommend to anyone in n...

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Alfredo Weber

Feb 04, 2026

The absolute best in Toronto for Tax Law - and I mean that from the bottom of my heart

Honestly, I can't thank John O'Connor enough for everything they've done for me. They really know their stuff when it comes to Tax Law and it shows in the results. 10/10 would recommend to anyone in n...