Canada’s high-profile economic marriage with the United States and Mexico faces a formal check-in in 2026 and possible expiry in 2036. Washington’s new tariffs and wider security demands already cloud that horizon.
At the same time, London is pitching deeper ties through the Canada-U.K. Trade Continuity Agreement, which already waives duties on 98 percent of Canadian goods. The question is whether the British track can ever match the North American one in weight and certainty.
North American grip still dominant
CUSMA underpins almost every factory and farm supply chain in the country. In 2024, 75.9 percent of Canada’s merchandise exports went south of the border, while the United Kingdom accounted for just 3.7 percent, a distant third behind China.
The C.D. Howe Institute warns that the advantage is also about predictability: “CUSMA currently shields around 90 percent of Canadian exports from U.S. tariffs,” the think-tank says in an August 2025 report urging early renewal talks. If Ottawa cannot secure that renewal by the 2026 review, exporters face a maze of reopening clauses and the political unknowns of two election cycles in Washington.
Mexico, a smaller but crucial auto-parts and agri-food market for Canada, brings the overall CUSMA share of Canadian exports to roughly 78 percent. That concentration shows why Statistics Canada still classifies Canada’s trade profile as “highly concentrated.” The home-field edge of no-border trucking and rail links, scale production runs and shared standards will not vanish even if political heat rises.
What could tilt the balance
Still, the U.K. offers fresh ground where distance matters less. London needs critical minerals, small modular reactor know-how and carbon-capture gear, all areas where Canadian firms claim an edge.
“Canada’s role as a consistent and trusted partner and our active intelligence sharing in the Five Eyes security establishment make Canada an increasingly attractive trade destination,” Mark Sullivan, director of digital technology and advanced manufacturing at Export Development Canada, told a September 2025 briefing.
Bilateral trade is growing from a lower base. Goods and services flows with the U.K. rose 15 percent between 2023 and 2024, and Ottawa and London have promised to broaden the deal to cover digital trade and green finance. A win on critical minerals processing or a joint hydrogen supply corridor could multiply volumes faster than traditional commodities alone.
Even so, the numbers must climb ten-fold to rival CUSMA’s heft. The continuity pact still lacks the dispute-settlement depth and integrated rules-of-origin grid that makes North America a seamless production zone.
Air freight and Atlantic shipping add costs that Midwest trucking does not. Unless those structural gaps narrow, British business will stay a complementary hedge rather than a replacement for the continent next door.
Ottawa therefore faces a two-track job. Negotiators need to lock in a stable, possibly updated CUSMA while accelerating sector-specific gains with the U.K. That combined strategy, rather than an either-or choice, is most likely to protect Canadian exporters from policy shocks and keep boardroom investment plans on schedule.
The U.K. relationship can grow sharply, but overtaking CUSMA within ten years would require shifts in politics, logistics and corporate behaviour as dramatic as any seen since the original NAFTA took effect three decades ago.
