SourceOther

U.S.–Canada Tariffs: Timeline of Key Dates and Documents

Published by

Blakes (Blake, Cassels & Graydon)

Author

Zvi Halpern-Shavim and Elena Balkos

Date

4 September 2026

Access

Free to read

Link

www.blakes.com/insights/us-canada-tariffs-timeline-of-key-dates-and-do…

Checked

28 September 2026

Quotes from this source

Events it documents

• 8 September 2026Canadian counter-tariffs take effect on C$27.6B of US goods (about US$20B), matching the US Section 338 tariffsActionTariff actionCanada3 sources
• 25 August 2026Finance Canada announces counter-tariffs of 15, 25 and 50% on C$27.6B of US goods, effective Sept 8, plus a C$7.5B support packageActionTariff actionCanada4 sources
• 22 August 2026US Section 338 tariffs of 50% on Canadian goods take effect; Carney says the US 'asked too much and offered too little'ActionTariff actionUnited States2 sources
• 19 June 2026Canada's provisional 10% global safeguard tariff on canned vegetables takes effect (US goods excluded)ActionTariff actionCanada1 source
• 6 April 2026US Section 232 tariffs on steel, aluminum and copper begin to apply to the full value of imported articles and their derivatives, at rates of 10% to 50%ActionTariff actionUnited States3 sources
• 24 February 2026IEEPA tariffs stop being collected and a temporary 10% global surcharge under Section 122 takes effectActionTariff actionUnited States3 sources
• 26 November 2025Canada cuts steel tariff-rate quotas and announces a 25% tariff on steel derivatives, in force Dec 26.ActionTariff actionCanada2 sources
• 14 October 2025US Section 232 wood tariffs take effect: 10% on softwood lumber and 25% on upholstered furniture, kitchen cabinets and vanities, with no CUSMA exemptionActionTariff actionUnited States3 sources
• 1 September 2025Canada removes most of its counter-tariffs on US goods: the full Phase 1 list (about C$30.3B of annual imports) and the non-steel, non-aluminum goods (about C$14.4B)ActionTariff actionCanada5 sources
• 7 August 2025Revised country-specific 'reciprocal' tariff rates take effect for other US trading partnersActionTariff actionInternational1 source
• 29 June 2025Canada rescinds its digital services tax and halts the 30 June collection "to advance broader trade negotiations with the United States"ActionTrade talksCanada2 sources
• 27 June 2025Trump says the US is "terminating ALL discussions on Trade with Canada, effective immediately" over Canada's digital services taxStatementTrade talksUnited States2 sources
• 27 June 2025Canada sets tariff-rate quotas on steel imports from countries without a free trade agreementActionTariff actionCanada1 source
• 4 June 2025US Section 232 tariffs on steel and aluminum double from 25% to 50% on 4 June 2025 for all countries except the UKActionTariff actionUnited States2 sources
• 15 April 2025Canada grants six months of tariff relief on inputs, a remission framework for automakers producing in Canada, and a loan facilityActionTariff actionCanada1 source
• 9 April 2025Canada's auto counter-tariff takes effect.ActionTariff actionCanada3 sources
• 9 April 2025US announces a 90-day pause on country-specific reciprocal rates for other countriesActionTariff actionInternational1 source
• 13 March 2025Canada adds 25% counter-tariffs on C$29.8B of US steel, aluminum and other goods.ActionTariff actionCanada2 sources
• 6 March 2025Executive Order 14231 exempts USMCA-compliant Canadian goods from the fentanyl tariffs from 7 March and cuts the rate on Canadian potash to 10%ActionTariff actionUnited States5 sources
• 20 January 2025Inauguration.DocumentOtherUnited States1 source