Canada braces for prolonged trade war as US counter-tariffs take effect

Canada just fired back. On September 8, 2026, the country activated counter-tariffs covering between $20 billion and $27.6 billion worth of US imports, a direct response to the 50% duties Washington levied on Canadian goods back on August 22. The result is the most significant trade escalation between the two neighbors since the first salvos were exchanged in 2025, and neither side appears interested in blinking first.

The retaliatory measures span more than 700 tariff lines, with duties ranging from 15% to 50% depending on the product category. Steel and aluminum imports from the US now carry a 50% surcharge. Dairy products and appliances face a 25% hit. Electronics got off relatively lightly at 15%.

How we got here

The US tariffs that triggered this response went into effect on August 22, 2026, raising duties by 50% on roughly $20 billion of Canadian exports. The targeted goods included wine, dairy, and automobiles, three sectors that form critical arteries of cross-border commerce.

Trade negotiations between Washington and Ottawa had been ongoing through late August but collapsed, with both sides blaming the other for introducing unreasonable last-minute demands.

Three days after the US tariffs hit, on August 25, the Canadian government announced a C$7.5 billion support package designed to cushion the blow for businesses and workers caught in the crossfire.

These counter-tariffs represent Canada’s broadest retaliatory action since the initial rounds of tit-for-tat duties began in 2025.

The economic fallout

The dairy sector faces a particularly awkward situation. The US initially targeted Canadian dairy with its 50% levy, and Canada responded with a 25% duty on American dairy products heading north.

Canada’s C$7.5 billion aid package is substantial but finite. The value of goods now subject to retaliatory tariffs is roughly three to four times larger than the support fund.

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