Canadian and US trade officials are meeting in Washington ahead of a Friday midnight deadline, seeking to avert a potential 50% tariff on a range of Canadian imports that President Donald Trump has threatened if no agreement is reached. The latest reports suggest the negotiators are leaning toward a deal that would lock in a 15% tariff on the US‑content portion of vehicles assembled in Canada, a figure that industry experts warn would erode profitability and stall investment in domestic plants.
The Proposed Tariff and Its Mechanics
According to sources cited by *The Globe and Mail*, the prospective agreement would reduce the current US tariff on the American‑made content of Canadian‑built cars from 25% to 15%, while removing the exception for domestic and Mexican inputs that Ottawa had sought. Because roughly half of the value of a car assembled in Canada originates in the United States, the effective duty on the finished vehicle would fall between 6% and 8%.
That range is significant, analysts say, because it mirrors both the typical labour cost of assembly and the average profit margin on a vehicle, which sits at roughly 6% to 8%. “None of these carmakers are non‑profit enterprises and so over the longer term they’ll start to look at Canada and think, ‘where can we make more money?’ ” said Greig Mordue, an engineering professor at McMaster University and a former general manager of Toyota in Canada.
Industry Reaction and Expert Warnings
Peter Frise, an automotive engineering professor at the University of Windsor, cautioned that the full impact will only be clear once the final text is released, but he stressed that a 15% levy would inevitably raise vehicle prices for consumers across North America and dampen spending on plant upgrades. “In an industry where profit margins are typically 6 to 8 per cent, 15 per cent is a lot,” Frise remarked.
The Anderson Economic Group has calculated that the existing auto tariffs on Canada and Mexico cost US consumers and businesses US$12.5 billion in 2025, a figure that excludes steel, aluminium and other levies. Patrick Anderson, the consultancy’s chief executive, warned that the burden could shift depending on the outcome of the current negotiations.
Historical context looms large: last year Trump imposed a 25% tariff on Canadian‑made cars under Section 232 of the Trade Expansion Act of 1962, sidestepping the USMCA framework, and simultaneously levied 50% duties on imported aluminium and steel. Those moves were justified by the administration as a bid to reshore US manufacturing and apply economic pressure on Canada—a tactic Trump has openly said he intends to repeat.
What Lies Ahead for Canadian Plants
Ontario hosts assembly lines for Honda, Toyota, Stellantis, General Motors and Ford, facilities that rely on the US for about 90% of their sales. The sector employs roughly 105,000 people nationwide, according to the Canadian Vehicle Manufacturers’ Association.
Since the 2025 tariffs took effect, several major announcements have signalled unease: Honda shelved its $15‑billion electric‑vehicle project, Stellantis shifted planned Jeep production from its idle Brampton plant to Illinois, General Motors closed its electric‑van facility in Ingersoll and trimmed shifts at Oshawa, while Toyota and Honda have kept Canadian output steady despite signalling that the current duties are unsustainable.
Toyota recently disclosed plans to double the size of its San Antonio, Texas, plant by 2030, and Honda is reportedly scouting a new North American site that analysts expect will be situated in the United States. Mordue noted that building a fresh US facility takes two to three years, whereas shifting output to an existing American plant with spare capacity can be accomplished in roughly six months—a timeline that does not bode well for Canada’s long‑term viability as an assembly hub.
Although Canadian‑made auto parts would remain tariff‑free, Mordue warned that the loss of assembly work could hollow out the broader supply chain. “That’s not to say all of the parts [factories] will disappear. It’s not to say all of the assembly will disappear, but it’s a long‑term challenge,” he said. “And even companies like Toyota and Honda, which have stayed pretty steady and consistent, will start to look askance.”
Why it Matters
The looming 15% tariff threatens to turn Canada’s automotive sector from a profitable export engine into a cost centre, prompting manufacturers to reconsider where they invest future capital and where they locate new model production. With thousands of jobs and billions of dollars in economic activity at stake, the outcome of the Washington talks will not only shape the immediate fortunes of Ontario’s assembly plants but could also redefine the geographic balance of North American carmaking for years to come.
