U.S. 50% tariffs on C$28 billion in Canadian goods take effect

Tariffs now in force

U.S. 50% tariffs on about US$20 billion, or C$28 billion, of annual Canadian goods took effect at 12:01 a.m. ET on August 22. The White House imposed the duties under Section 338 of the Tariff Act of 1930 after Canada suspended trade negotiations on August 21.

The duties apply to listed Canadian goods even when they qualify for preferential treatment under the United States-Mexico-Canada Agreement, according to the White House fact sheet. The administration cited Canadian treatment of U.S. alcoholic beverages, dairy products and motor vehicles.

The tariffs had been scheduled for August 19 before the White House delayed them for three days during negotiations. The August 22 proclamation established the final effective date.

Scope and immediate exposure

Covered products include wine, dairy-related goods, hockey equipment and cement. Energy, potash, fish, critical minerals and goods already subject to Section 232 tariffs are excluded from this round.

The US$20 billion covered by the new tariffs equals about 5.2% of the US$381.9 billion in U.S. goods imports from Canada during 2025. Total bilateral goods trade reached US$715.5 billion that year, according to the U.S. Census Bureau.

The limited share of total trade constrains the immediate economy-wide exposure relative to the 50% tariff rate. The duty remains substantial for affected product lines and could alter sourcing, shipments or production decisions for Canadian suppliers serving the U.S. market.

The exclusions preserve existing cross-border flows in energy and critical minerals under this package. President Donald Trump has separately threatened 50% tariffs on Canadian vehicles, auto parts and steel beginning next year, according to Associated Press reporting. Those measures are not yet in force, and their timing, legal instrument, coverage and exemptions remain unspecified.

Canadian response remains incomplete

Prime Minister Mark Carney recalled Canadian negotiators and said last-minute U.S. changes were unfair, uneconomic and incompatible with Canadian sovereignty in an August 21 statement. The U.S. and Canadian accounts of the failed negotiations differ, and public documents do not resolve the differences.

Canada plans targeted counter-tariffs effective September 8. Carney identified steel, dairy, appliances, agricultural equipment, pulp and paper, and electronics as intended sectors in remarks on August 22.

Canada describes its response as dollar-for-dollar, while saying it will target sectors rather than necessarily match every U.S. tariff line. The final product list, tariff rates and total affected trade value had not been published as of August 25.

Counter-tariffs would raise costs and reduce choice for Canadian importers and consumers, as Carney acknowledged. Ministers were scheduled to announce worker and business measures on August 25 addressing liquidity, employment and competitiveness.

Dependence on the U.S. market

Canada sent 71.7% of its merchandise exports to the United States in 2025, down from 75.9% in 2024, according to Statistics Canada. The share indicates that replacing lost U.S. demand would require substantial expansion in other markets.

Washington says Canada discriminates against U.S. cars, alcohol and dairy, while Canada says the tariffs violate CUSMA commitments. No cited adjudicatory body has resolved those legal claims.