Canada has introduced retaliatory tariffs on nearly $20 billion of US goods, escalating the trade dispute with its largest trading partner as negotiations between the two countries remain stalled.
The counter-tariffs, which took effect on Tuesday (September 8th), cover hundreds of American products including steel, furniture and clothing, with rates reaching as high as 50 percent. They come in response to a series of US tariffs on Canadian goods, including 25 percent duties on cars and trucks and tariffs on steel, aluminum and lumber.
Further US measures introduced in late August imposed 50 percent tariffs on products including dairy, alcohol, hockey sticks and perfume. Canadian Prime Minister Mark Carney has described Canada's response as "dollar-for-dollar".
The escalation is particularly significant given the scale of trade between the two countries. Canada and the US had a bilateral trading relationship worth nearly $900 billion in 2025, meaning additional tariffs have the potential to affect deeply integrated supply chains on both sides of the border.
This is already influencing Canada's approach. Fresh fish and lobster were initially included in the latest counter-tariffs but were subsequently removed following pressure from the Canadian seafood industry. American-caught lobster is frequently sent to Canada for processing before being returned to the US, illustrating how tariffs intended to target imports can also create costs for domestic industries dependent on cross-border supply chains.
Businesses are consequently preparing for the possibility that the dispute will continue. Canadian chamber of commerce CEO and president, Candace Laing, said businesses "understand retaliation but don't want to see endless escalation", adding that they are nevertheless "preparing for this trade dispute to last".
There is currently little indication of an immediate resolution. Trade negotiations collapsed in late August, with both sides suggesting the other must make the next move before talks resume.
The dispute may also accelerate changes in Canada's trading relationships. Mr Carney has pledged to diversify trade away from the US, and July figures show the share of Canadian exports destined for the American market had fallen to 66 percent, compared with an average of 75 percent before the trade war.
With negotiations stalled and further retaliation possible, companies face growing uncertainty over costs, sourcing decisions and the future structure of North American supply chains.