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USA / Canada tariffs
The official notices, and the diary we kept while it was happening.
Official sources
Primary documents, straight from the agencies. These stay current.
The US / Canada Tariff Diary
26 entries, 1 March 2025 to 31 October 2026. A running record of what changed at the border and when — useful for working out which rules applied to a shipment on a given date, not as live guidance.
20267 entries
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October 2026: the 50% list is redrawn — some goods out, more goods in
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September 2026: C$27.6 billion of Canadian counter-tariffs, then a US import ban
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August 2026: the 50% tariffs take effect
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July 2026: the CUSMA review passes without renewal, and 50% tariffs are signed
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June 2026: forced-labour findings, and a significant rework of the metals regime
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April 2026: metals tariffs move from metal content to full value
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February 2026: the Supreme Court strikes down the IEEPA tariffs — and a 10% surcharge replaces them
202519 entries
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December 2025: remissions extended, and the derivative tariff starts on Boxing Day
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November 2025: Canada tightens steel quotas and taxes derivatives
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October 2025: lumber, cabinets and furniture — with no CUSMA exemption
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September 2025: Canada lifts its first round of retaliation — but not on metals or autos
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August 2025: copper at 50%, the non-CUSMA rate to 35%, and the end of de minimis
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June 2025: steel and aluminum double to 50%, and Canada answers with quotas
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May 2025: the 25% auto-parts tariff lands, and CUSMA becomes the dividing line
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North American Trade Shake-Up – Weekly Recap (April 24–28)
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Trade Tensions Peak as Tariff Fallout Disrupts Cross-Border Supply Chains (March 11–April 23 Recap)
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Ontario's 25% Hike on U.S. Electricity Exports Escalates Trade Tensions Amid Tariff Dispute
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Mark Carney Named Trudeau’s Successor, Takes Strong Stance Against Trump’s Tariff Threats and Rejects Talk of Canada Becoming the 51st U.S. State
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The U.S. stock market experienced significant declines amid fears of a potential recession, attributed to President Trump's aggressive trade policies and job cuts.
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Trudeau Gets Emotional Over U.S. Tariffs as Trump Threatens New Tariffs on Canadian Dairy & Lumber, Escalating Trade War
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Trump paused 25% tariffs for a month to pressure Canada on immigration and fentanyl. Canada delayed $125B in new tariffs but kept $30B. Ontario hiked U.S. electricity export fees by 25%.
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Canada challenged U.S. tariffs at the WTO, calling them unjustified, while Trump granted a one-month exemption for U.S. automakers under industry pressure.
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U.S. tariffs officially took effect, pushing prices up overnight.
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Ontario Premier Doug Ford threatened to cut U.S. electricity exports, stating America "needs to feel the pain."
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Canada announced 25% tariffs on $30 billion in U.S. goods, with more on the table, in response to the U.S. tariffs.
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The U.S. confirmed that 25% tariffs on Canadian imports would start March 4, citing national security concerns related to drug trafficking and illegal immigration.
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