Background
Adrian Robinson, a dual Canadian-UK citizen, filed Canadian income tax returns as a Canadian resident for the 2000 to 2015 taxation years. After a voluntary CRA disclosure in 2013 and a subsequent audit, Robinson wrote to the CRA in February 2017 asserting he had in fact been a UK resident since 2000 and that his Canadian filings had been “incorrect.” The CRA rejected that claim and issued reassessments on September 7, 2017, upholding his Canadian-resident status. Robinson separately filed a disclosure with HMRC in December 2018 under the UK’s Worldwide Disclosure Facility, claiming UK residency from 2002 to 2017 and acknowledging he had “overpaid tax in Canada not in accordance with the treaty.” HMRC issued a Certificate of Residence in April 2019 confirming UK residency, and in March 2021 issued assessments taxing him as a UK resident for the 2000/2001 and 2001/2002 tax years.
On January 25, 2022, Robinson submitted a Mutual Agreement Procedure (MAP) request to the CRA under Article 23 of the Canada-UK Tax Convention, seeking to resolve the double taxation. He identified the March 2021 HMRC assessments as the “first notification” of double taxation triggering the three-year limitation period. On June 30, 2022, the Minister of National Revenue — through the CRA — denied the request as time-barred, concluding that the September 7, 2017 CRA Reassessment, combined with Robinson’s own 2017 assertion that Canadian taxation was contrary to the Convention, constituted the first notification of taxation not in accordance with the Convention. Both the Canadian and UK Competent Authorities agreed on this trigger date.
Robinson sought judicial review, arguing the Minister applied an overly restrictive interpretation of the limitation period and failed to construe the Convention in the manner most favourable to the taxpayer. He also contended the decision lacked intelligibility and justification. A threshold issue arose from an affidavit filed by Robinson’s own counsel, who was also counsel of record on the application.
The Court’s Holding
Justice Ngo dismissed the application for judicial review. Applying the reasonableness standard from Canada (Minister of Citizenship and Immigration) v Vavilov, 2019 SCC 65, with a “reasons first” approach, the Court found the Minister’s interpretation of the three-year limitation period was internally coherent, grounded in the language of the Convention, and supported by the OECD Commentary on Article 25 of the Model Tax Convention. The relevant trigger under Article 23 of the Convention is the “first notification of the action resulting in taxation not in accordance with the provisions of this Convention” — and Robinson’s own February 2017 letter characterizing the CRA’s position as incorrect, together with the September 2017 reassessment that followed, satisfied that standard. The Court rejected the argument that the clock could only begin upon confirmed, actual double taxation.
The Court also found that Robinson failed to discharge his burden of demonstrating that the Decision was unreasonable. His proposed interpretation — that the limitation period starts only when double taxation is crystallized by a foreign assessment — was not compelled by the Convention or Commentary; the Minister’s contrary reading was a permissible one that both competent authorities shared. Deference was owed to the Minister’s interpretation in this foreign-affairs-adjacent context, consistent with the Federal Court’s earlier analysis in CGI Holding LLC v Minister of National Revenue, 2016 FC 1086.
On the preliminary affidavit issue, the Court partially struck the affidavit of Robinson’s counsel. Paragraphs containing legal arguments, opinions, contested facts, fresh evidence not before the decision-maker, and post-decision communications were disregarded under Federal Court Rules 81(2) and 82 and the principles in Bernard v Canada (Revenue Agency), 2015 FCA 263. Only neutral, uncontested contextual paragraphs and attached documents were retained.
Key Takeaways
- The MAP limitation period under the Canada-UK Tax Convention runs from the taxpayer’s “first notification” of action resulting in taxation not in accordance with the Convention — not from the date double taxation is formally confirmed by the other state’s assessments.
- A taxpayer’s own representations to tax authorities characterizing a reassessment as contrary to a tax treaty can establish the limitation period’s trigger date, even before the foreign jurisdiction has issued any assessment.
- Affidavits from counsel who also serves as advocate are strictly limited under the Federal Court Rules: legal arguments, opinions, contested facts, and post-decision events will be disregarded or struck.
- The Minister’s interpretation of tax treaty provisions and OECD Commentaries in the MAP context attracts deferential review under the reasonableness standard, particularly where both competent authorities concur.
Why It Matters
This decision carries a direct warning for cross-border taxpayers and their advisors: the MAP clock under Canadian tax treaties can start running at the moment a taxpayer (or their counsel) first characterizes a domestic reassessment as contrary to a treaty — not merely when double taxation is confirmed by the foreign jurisdiction. Waiting for the other country to formally assess before filing a MAP request may forfeit access to the procedure entirely, even where the taxpayer was simultaneously pursuing domestic remedies and foreign disclosure processes in good faith.
The case also underscores the evidentiary pitfalls of having litigation counsel file substantive affidavits in Federal Court judicial reviews. Where counsel’s affidavit strays beyond uncontested background facts into legal argument, opinion, or fresh evidence, it will be disregarded — and the credibility risk from cross-examination on contested matters adds further exposure. Tax practitioners structuring the evidentiary record for MAP-related judicial reviews should retain independent affiants for any contentious factual matters.