Derek Wagar is a Partner in the Tax group at Fuller Landau. With a wealth of experience as a Canadian income tax professional, he uses his specialized knowledge and expertise to help clients pay less corporate and personal tax. In particular, he advises on reorganizations, trusts and estate planning, corporate acquisitions and disposals, corporate tax due diligence, cross-border tax issues, sales tax, and tax minimization strategies.

Clients value Derek’s direct approach to communication and his practical, results-oriented nature. He takes the time to simplify complex concepts to ensure clients are well-informed when making important decisions for their business. Derek’s clients include high net-worth individuals, small and mid-sized owner-managed companies, and other private corporations.

Derek plays an active role when it comes to training and mentorship at Fuller Landau. He proactively works to advance the professional development of managers and junior staff, alike. Outside the office, Derek enjoys playing hockey and golf, and spending time with his wife and two children. For the past several years, he has been a Board member for the Pancreatic Cancer Canada Foundation, while also serving as its Secretary Treasurer.

Academic Achievements, Memberships and Professional Designations

  • Member, CPA Ontario
  • Canadian Tax Foundation
  • Completed CICA In-Depth Tax Courses

Community Initiatives/Community Organizations

  • Secretary/Treasurer and Member of the Board, National Pancreatic Cancer Canada Foundation

Derek Wagar

CPA, CGA Partner, Tax 416-645-6518

Practice Areas

  • Tax


  • Manufacturing and Distribution
  • Real Estate and Construction
  • Information Technology
  • Professional Services
  • Transportation and Logistics

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Fuller Insights

4 Major Ways the Proposed Tax Changes Will Affect Small and Mid-Sized Privately-Held Businesses

Derek Wagar • September 27, 2017

You’ve likely heard a lot of discussion about the government unveiling plans in July to change several aspects of how private corporations are being used for tax planning. While not all of the specific details are known, if these rules are passed they will have a significant financial impact on many small and mid-sized private

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Federal Budget 2017 – Professionals and Work in Progress

Derek Wagar • March 23, 2017

The Federal Budget tabled on March 22, 2017 proposed the elimination of a tax deduction related to professionals and work in progress. Work in Progress Revenue for Certain Professionals Generally speaking, unbilled work in progress (WIP) must be included in computing income for tax purposes. However, certain designated professionals (i.e. lawyers, dentists, medical doctors, chiropractors, veterinarians, and

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Federal Budget 2017 – Tax Planning Using Private Corporations

Derek Wagar • March 23, 2017

The Federal Budget of March 22, 2017, announced the government’s intention of creating a tax system which promotes fairness amongst the Canadian middle class. Tax Planning Using Private Corporations The government has indicated its concern with a number of tax reduction strategies currently being implemented by high-income earners and their corporations, who may be gaining

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