12 Years of Trade Anxiety: Why Legal Teams Must Prepare for Annual CUSMA Reviews

For in-house legal and trade compliance teams, the end of CUSMA renewal certainty marks the start of a protracted regulatory marathon. Annual reviews open the door to frequent changes in rules of origin, tariff classifications, and documentation standards—each carrying litigation risk and the need for rapid legal adaptation.

U.S. President Donald Trump's decision not to renew the Canada-United States-Mexico Agreement (CUSMA) on July 1, 2026, opens a new chapter of prolonged trade uncertainty for Canadian businesses. While the immediate impact is muted — roughly 90% of Canadian exports continue to cross the border duty-free — the decision triggers a series of annual reviews that will stretch until the agreement's scheduled expiry in 2036. This creates a decade-long twilight where the rules governing North American trade can be revisited each year, shifting from past shocks that had clear beginnings and ends to an era of persistent flux.

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President Donald Trump's decision not to renew the Canada-United States-Mexico Agreement (CUSMA) on July 1, 2026, opens a new chapter of prolonged trade uncertainty for Canadian businesses.

The 2020 transition from NAFTA to CUSMA was itself a wrenching adjustment, requiring overnight rewrites of supply chain and customs procedures. The pandemic later upended logistics. Yet those events, however disruptive, were finite. Now, businesses must adapt to a landscape where the rules themselves may evolve annually. As Charmaine Goddeeris, a tax and trade expert at BDO Canada, notes, this is not merely a trade story but a tax and customs compliance predicament — one where proactive preparation can make the difference between thriving and merely surviving.

The annual review mechanism, embedded in the original agreement's six-year sunset clause, allows any party to revisit terms on an annual basis once renewal is declined. This means that each year, the U.S. could propose changes to rules of origin, tariff classifications, labour provisions, or enforcement mechanisms. For Canadian exporters, this translates into a constant need to verify that their products remain compliant with the latest iteration of the agreement. Documentation — certificates of origin, valuation records, supply chain mappings — becomes paramount. Businesses that have historically treated customs compliance as a periodic fire drill must now institutionalize it as a continuous function, integrating real-time monitoring and cross-departmental coordination between legal, finance, and operations.

The tax implications are equally profound. Transfer pricing arrangements may need recalibration if tariffs shift. Duty deferral and drawback programs could be altered, affecting cash flow and working capital. Companies with complex cross-border supply chains face potential double taxation or unexpected liabilities if they fail to stay ahead of rule changes. Moreover, the psychological toll of perpetual uncertainty can dampen investment, with boards hesitant to commit capital to long-term U.S.-Canada integrated operations when the guardrails may shift annually.