Derrick R. Hosanna


Calgary, Alberta

Derrick’s practice covers a broad spectrum of income tax law matters with a focus on corporate and personal tax planning, mergers and acquisitions, corporate reorganizations, and dispute resolution with the Canada Revenue Agency and provincial taxing authorities.

Derrick is a sessional instructor of corporate tax law at the Thompson Rivers University Faculty of Law and has presented and written on a variety of tax related topics in various forums.


  • Bachelor of Commerce, Lakehead University, 2010
  • Juris Doctor, University of Alberta, 2013
  • Taxation of Canadian Oil and Gas Companies, University of Calgary, 2014
  • CPA Canada In-Depth Tax Course, 2017
  • CPA Canada In-Depth International Tax Course, 2019

Memberships & Affiliations

  • Member, Law Society of Alberta
  • Member, Calgary Bar Association
  • Member, Canadian Bar Association
  • Member, Canadian Tax Foundation


Publications & Presentations
  • “Introduction to Search Funds and Acquisitions”, (2024) Haskayne School of Business MBA Program
  • Sessional Lecturer, Corporate Tax, Thompson Rivers University Faculty of Law, 2023 to Present
  • “Shareholder Agreements: Update 2022”, (2022) Entrepreneurial CPAs of Calgary
  • “Tax Case Law Update for Private Corporations”, (2022) CPA Calgary
  • “After a Pandemic: Estate Planning from a Legal Perspective”, (2022) Estate Planning Council of Calgary
  • “Trust Law, the Taxation of Trusts and the New Trust Reporting Rules”, (2021) Entrepreneurial CPAs of Calgary
  • “Tax Dispute and Case Law Update for Private Corporations”, (2021) Entrepreneurial CPAs of Calgary
  • “Debt Restructuring in the Resource Sector: Selected Issues” Corporate Structures & Groups Journal (Federated Press) (2021).
  • “The Death of the Tariff: A Review of the Tax Court’s Discretionary Approach to Costs Awards” (2020) 68:2 Canadian Tax Journal 409-38.
  • “Derivative Assessments: Challenging the Underlying Liability”, (2020) Tax Dispute Publication.
  • “B.C. Court of Appeal Gives New Life to Post-Fairmont Rectification”, (2020) Tax Dispute Publication.
  • “CRA Audit Powers: Recent Developments”, (2019) Canadian Petroleum Tax Society Fall Lecture Series.
  • “Rectification Strikes Back: B.C. Court of Appeal Allows Rectification of Tax Mistake”, (2019) Tax Practitioners’ Forum.
  • “CRA Audit Powers: Recent Developments”, Canadian Petroleum Tax Society Fall Lecture Series, October 2019.
  • “Groscki: Scope for Director’s Liability Under Section 159”, Vol. 18, No. 2, Tax for the Owner-Manager, April 2018.
  • “Drafting Wills and Trusts”, Legal Education Society of Alberta (LESA) Seminar, March 2017.
  • “Alternative Arguments on Appeal: Does Finance Get the Last Word?”, Vol. 16, No.4, Tax for the Owner-Manager, October 2016.
  • “A Primer on Trust Law and the Taxation of Trusts”, Canadian Tax Foundation, Calgary Young Practitioners Group and Canadian Bar Association (Alberta), Tax Specialists Group Presentation, April and May 2016.
  • “Common Tax Issues for Corporate Lawyers”, Canadian Bar Association (Alberta), Tax Non-Specialists Group Presentation, October 2015.
  • “Legal Invoices: Maintaining Privilege While Supporting Deductibility”, Tax for the Owner-Manager, July 2015.
  • “The Conditions for-and Scope of- Subsection 152(4.3) Consequential Reassessments,” XIX Tax Litigation (Federated Press), 2015.
  • “Planning for Professionals – Mitigating the Personal Services Business Risk”, Canadian Bar Association (Alberta), Tax Specialist Group Presentation, September 2014.
  • “When is a Loan to a Shareholder-Employee Made as a Result of Employment?”, Vol. 14, No. 1, Tax for the Owner-Manager, January 2014.

Work with our experts

We're here to discover your tax law advantage.