Canada's counter-tariffs take effect, and the US signs import bans the same day
Moment dated Sep 8, 2026; earliest linked report published Sep 10, 2026.
Canada's counter-tariffs took effect at 12:01 a.m. on September 8 on a list of US goods. Canada's 2025 tariff on some US-built vehicles stayed. The same day President Trump signed five proclamations. They add and remove goods on the US tariff list from September 15. They also schedule bans on some Canadian goods for September 29, among them packaged beer, wine and spirits, whey products and motorcycles over 800 cc.
Why this matters
Each government describes its own step as a response to the other's. The White House says the bans respond to Canada's 'additional retaliation'. Canada's customs notice says its counter-tariffs, which it calls a surtax, respond to the US tariffs.
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Canada's counter-tariffs have been in force since September 8, 2026, and its 2025 tariff on some US-built vehicles stays in place. The counter-tariffs charge 15, 25 or 50 per cent on US goods covering C$27.6 billion in imports. The same day, President Trump signed bans on some Canadian imports, scheduled for September 29.
Which of the two governments' September 8 measures reached the border first? → See all 1 claims from this moment →How it was reported
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Sources behind this moment
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Department of Finance Canada
Official record
Canada announces targeted countermeasures and substantive support for workers and businesses in response to U.S. tariffs
www.canada.caRead original source (opens in a new tab)
Counter-tariff announcement and support-package sections
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The White House
Official record
Fact Sheet: President Donald J. Trump Responds to Canada's Retaliation
www.whitehouse.govRead original source (opens in a new tab)
Opening section and the paragraph giving the effective dates
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The White House
Official record
Excluding Certain Canadian Products from Importation into the United States, with Respect to Motor Vehicles (Proclamation 11063, with Annex I)
www.whitehouse.govRead original source (opens in a new tab)
Recitals on Canada's motor vehicle tariff scheme; the effective-date clause; Annex I