US-Built Cars Lose Canada: How Ottawa's Tariff Remission Rules Hit Southern Car Plants
The US-built share of Canadian car sales fell to 28.4% from 35.4%. Nearly all of the loss came from brands with no Canadian factory, which moved their sourcing to Japan, Korea and Mexico. Ottawa's remission rules chose who lost, and the January 50% US tariff will speed the shift up.
The headline figure makes it look as though tariffs are backfiring on Detroit. US-built vehicles made up 28.4% of Canadian new-vehicle sales in the first half of 2026, down from 35.4% a year earlier and from about 40% in the years to 2025, according to JD Power Canada. The breakdown shows who is paying. Ottawa set up its counter-tariffs so that carmakers building in Canada keep access to their US plants, while carmakers that only import face the full charge. The big losers are the US factories of Japanese and Korean brands that used to supply Canada from Indiana, Alabama and Tennessee. The winner is Mexico, which is now close to overtaking the United States as Canada's largest source of new cars.
The JD Power figures, reported by Automotive News Canada and summarised by GM Authority, split the market in two. Automakers with Canadian assembly plants (GM, Ford, Stellantis, Honda and Toyota) sourced 45.2% of their Canadian sales from US factories, down only 3.1 percentage points. Automakers with no Canadian production cut their US-built share from 17.7% to 4.9% in a year. Subaru moved almost all of its Canadian supply to Japan. Hyundai now brings the Santa Fe from South Korea instead of Alabama, and leans more on Mexico. Mazda and Nissan have pulled some US-built models from Canadian showrooms.
That split follows from the policy design. Since April 2025 Canada has charged a 25% counter-tariff on US-built vehicles (on their US content, where the vehicle meets trade-pact rules), and a remission framework refunds it to manufacturers that keep building in Canada. The framework has been used to discipline carmakers. In October 2025 Ottawa cut General Motors' tariff-free quota by 24.2% and Stellantis's by 50% after both reduced Canadian production. Canada extended the relief this spring through a 2026 remission order for eligible automakers. In practice, carmakers that build in Canada can keep selling US-built cars there; those that do not must supply the market from somewhere other than the United States.
The Detroit Three have less room to move than their share figures suggest. GM's Canadian and US lineups largely overlap, and its Canadian sales fell 5.7% in the second quarter. Their exposure is less about lost share than about the remission quota, which Ottawa can cut whenever a plant closes. The import-only brands took the full hit and moved quickly, because a Subaru built in Gunma and a Subaru built in Lafayette look the same to a Canadian buyer. The US plant that loses those Canadian orders keeps the US tariff costs on its imported parts.
Mexico gained the most. It supplied 22.2% of Canadian sales in the first half, up from 18.3% a year earlier and 13.7% five years ago. Japan rose to 16.6% from 13.7% and South Korea to 15.6%. "Next year, Mexico could rival the U.S. as the No. 1 source of vehicles coming into Canada," said Robert Karwel of JD Power Canada. Even China's quota has helped an American company. Canada let in 49,000 China-built electric vehicles a year at a 6.1% tariff from March. Only 15,603 had arrived by the end of August, according to electrive, and most were Teslas from Shanghai. BYD has not launched in Canada yet.
The economy-wide effect may look small because Canada is a market of fewer than 2 million new vehicles a year. The Oxford Economics estimate of US jobs tied to Canadian auto purchasing is 0.12% of national employment, and projects such as Toyota's $3.6 billion expansion in San Antonio will add capacity at home. The concentration is greater than that figure suggests. Canada is the largest export market for American-built vehicles, bigger than the next ten combined, according to RBC. A plant that loses its Canadian volume cannot easily replace it in a US market paying tariff-inflated prices. Oxford Economics puts Kentucky's exposure at 3.7 times the national average, Michigan's at 3.5 and Indiana's at 3.2, and estimates that two-thirds of the jobs at risk sit outside car assembly. US motor-vehicle and parts employment is already down about 25,900 since January 2025.
The next 15 months will make it worse. President Trump has said US tariffs on Canadian cars, trucks, parts and steel will rise to 50% on January 1, 2027, and the increase is expected to apply even to vehicles that meet USMCA rules. On July 1 the US Trade Representative said the United States "did not agree to renew the USMCA in its current form" at the agreement's first six-year review, in Jamieson Greer's words, which leaves the pact in force but without a long-term commitment. US-Canada trade talks collapsed this month. Canada matched US rates on steel and aluminium but has so far not matched the 50% threat on cars, keeping its 25% auto tariff and remission system as its main lever.
For carmakers, the rational response is to make North America less integrated. A vehicle made in Japan or Korea now enters Canada more cheaply than one made in Ohio. A part that crosses the Detroit River several times picks up tariffs at each crossing. Brian Kingston, head of the Canadian Vehicle Manufacturers' Association, says it is now cheaper to build in Japan, Germany, Korea or Mexico and ship into North America than to build inside it. That is how a continental supply chain comes apart.
Our expectation is that Mexico passes the United States as Canada's largest source of new vehicles during 2027, and that the first-half 2027 data published next September will show it. We also expect the next round of re-sourcing to hit American-owned brands. Once the 50% US tariff raises the cost of Canadian-built parts, Ottawa's quota becomes harder for GM and Stellantis to meet from their Canadian plants. Investors looking at Detroit's Canadian exposure should watch the remission quotas Ottawa sets for 2027, because those limits will decide how much US-built volume can still reach Canadian dealers.