


Tax
McMillan’s Tax Group is a leading source of tax advice in Canada, engaging with companies from a range of industries, including the financial, automotive, pharmaceutical, private equity and natural resources sectors. As one of the top tax law firms in Canada our tax lawyers have been recognized as leading advisers by The International Tax Review, The Martindale-Hubbell Legal Directory, The Legal 500 and The Canadian Legal LEXPERT Directory.
With expertise in substantive tax law, tax administration, court procedure and tax policy, our tax team prioritizes understanding the clients’ business objectives to provide effective advisement and minimize the tax risk associated with our clients’ domestic and international business activities.
McMillan’s tax lawyers are recognized leaders in helping clients manage complex sales and commodity tax challenges. We provide clients with pragmatic advice on matters relating to customs duties, harmonized sales tax (HST), goods and services tax (GST), Quebec sales tax, British Columbia provincial sales tax, federal excise tax and duties, provincial land transfer taxes and other provincial taxes, such as those on gasoline, fuel and tobacco.
Our expertise doesn’t stop at the 49th parallel. McMillan’s Tax Group is one of Canada’s leading cross-border taxation practices with extensive experience implementing a full range of cross-border transactions, including mergers and acquisitions, financings, reorganizations and spin-offs.
McMillan provides comprehensive Canadian business tax advice on:
- International tax law advisement and planning for Canadian enterprises
- Optimizing the tax efficiency of foreign enterprises’ Canadian operations
- Guiding the tax structuring of mergers and acquisitions, and commercial reorganizations
- Transfer pricing matters
- Tax-efficient structuring of corporate finance and capital markets transactions
- Sales and commodity taxation matters, including GHT/HST compliance measures and ruling requests, voluntary disclosures, audits, objections and appeals, and advising on specialized tax legislation
- Advance ruling requests, voluntary disclosures, audits, objections and appeals
- Federal and provincial payroll taxes.
We also advise clients at every stage of the tax dispute resolution process, from audits through to administrative appeals and court challenges, routinely enjoying great success in resolving tax disputes with Canada’s federal and provincial revenue authorities.
McMillan’s Tax Litigation and Advocacy team combines expertise in tax administration, court procedure, substantive tax law and tax policy to assist with audits, and provide expert advice on administrative appeals and court challenges. Our tax litigators are tireless advocates as well as highly experienced practitioners with broad tax litigation experience gained from appearing before all levels of Canadian courts.
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Insights (10 Posts)View More
Tax Consequences of Rental Property Conversions
Case Comment on a recent, and potentially troubling, court decision concerning the tax consequences of a conversion of multi-unit rental property to condos.
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Apr 29, 2025
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Revised Innovation Tax Credits in the 2025-2026 Quebec Budget – Investors Take Note
Quebec's 2025-2026 budget overhauls innovation tax incentives with expanded R&D credits and AI-focused e-business credits.
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Apr 9, 2025
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Tax Court Agrees that Payments Recorded as “Salary” Were Actually Shareholder Loans
The Tax Court's decision in Malamute shows how casual annotations on cheques can cause serious problems with revenue officials for owner-managed businesses.
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Apr 2, 2025
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The Pause on the Tariff War: How Businesses Can Use the Reprieve Wisely
Canadian businesses should prepare for US tariffs, set for March 4, 2025, by considering availability of duty drawbacks and remission applications.
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Feb 5, 2025
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Preparing for Potential US Tariffs: Key Dates and Strategic Considerations
To prepare for potential US tariffs, businesses should immediately develop a strategy to deal with the prospect of new US tariffs and mitigate their effects.
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Jan 28, 2025
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Capital Gains Confusion: Navigating the Options for Reporting Employee Stock Option Benefits
This bulletin discusses proposed tax changes that will increase certain source withholding obligations for stock option benefits.
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Jan 21, 2025
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Capital Gains Confusion: The Reporting Conundrum for Investment Funds
Considerations when determining whether to complete T3 returns on the basis of the proposed capital gains tax changes that have yet to be enacted.
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Jan 10, 2025
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Federal Court of Appeal Upholds Arrears Interest on Non-Existent Tax Debts: Bank of Nova Scotia v Canada, 2024 FCA 192
The Federal Court of Appeal upheld the charging of "arrears interest" on notional income tax liabilities that are completely offset by carry-backs.
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Nov 27, 2024
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Towards a Shared Understanding: Canada’s New Sustainable Investment Guidelines & Mandated Climate Disclosures
Canada’s New Sustainable Investment Guidelines (Taxonomy) & Mandated Climate Disclosures
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Nov 4, 2024
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The United States Challenges Canada’s Digital Services Tax
On August 30, 2024, the United States challenged Canada’s Digital Services Tax under CUSMA. The dispute implicates billions of dollars in Canada-US trade.
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Sep 18, 2024
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