Canada is hitting back. Prime Minister Mark Carney has moved forward with counter-tariffs on US imports, calling the measures essential to protecting Canadian businesses and workers caught in the crossfire of an escalating trade war with the United States.
The retaliatory duties, which took effect on September 8, 2026, cover between $20 billion and $28 billion worth of American goods. Rates range from 15% to 50%, targeting products including steel, dairy, and electronics. The move came after US tariffs of up to 50% on roughly $20 billion of Canadian goods went into effect following the collapse of trade negotiations on August 21.
What Canada is actually doing
“Our tariffs are necessary to protect our workers, protect our companies and our communities,” Carney said.
Carney described recent negotiations with the US as derailed by “unfair” and “uneconomic” demands from the Trump administration.
The Canadian government has also initiated or expanded relief programs for domestic businesses affected by both sets of tariffs.
Economists estimate the short-term GDP impact on Canada could land somewhere between 0.2% and 0.8%.
How we got here
Carney has been Prime Minister since March 2025, when he succeeded Justin Trudeau after winning the Liberal party leadership and the subsequent election. His background as a former central banker, having led both the Bank of Canada and the Bank of England, gives him unusual credibility on economic policy.
Canada’s decision also reflects a broader strategic pivot. The trade dispute has pushed Ottawa to actively seek diversification of its trading partners. When your largest trading partner accounts for roughly three-quarters of your exports, diversification is less a strategy and more a survival instinct once that relationship turns hostile.
What this means for businesses on both sides
For Canadian companies that rely on US inputs, the counter-tariffs create immediate cost pressures. A manufacturer in Ontario sourcing American steel now faces rates that could add 25% to 50% to raw material costs.
Major news outlets have consistently framed Canada’s tariff response as proportionate rather than escalatory.
For investors watching the situation, the key variable is duration. The 0.2% to 0.8% GDP impact estimate for Canada assumes a relatively contained timeline. If tariffs remain in place through the end of 2026, those numbers could worsen considerably.