Canada Imposes 50% Tariffs on U.S. Steel and Aluminum Amid Growing Trade Dispute

Canada has announced that duties on a broad range of U.S. steel and aluminum imports will rise to 50%, effectively doubling the cost for American exporters, CNBC reported. The new tariff schedule, valued at roughly CA$27.6 billion in annual trade, comes into force this week and marks the latest escalation in a simmering trade disagreement between the two neighbours.

The increased rates apply to more than 200 product lines, including flat‑rolled steel, structural beams and aluminum sheet. Canadian officials say the measures are a direct response to Washington’s recent decision to reinstate higher tariffs on Canadian steel and aluminum, which were originally lifted under a 2022 agreement. By matching the U.S. rates, Ottawa hopes to pressure the United States back to the negotiating table.

Industry groups on both sides warn that the tit‑for‑tat approach could ripple through supply chains that rely on integrated North‑American metal markets. U.S. manufacturers that source Canadian alloy steel for automotive parts, for example, may see input costs rise sharply, while Canadian firms that depend on U.S. aluminum for beverage cans could face similar pressures. The tariffs are expected to raise prices for downstream consumers, from construction firms to appliance makers.

Background: The United States imposed a 25% tariff on Canadian steel and a 10% duty on aluminum in 2022 after Canada failed to meet a deadline for a joint anti‑dumping investigation. Those duties were lifted in 2024 when the two countries reached a “mutual‑respect” agreement that included a joint review mechanism. However, the Biden administration recently re‑activated higher tariffs, citing concerns over alleged subsidies and dumping by Canadian producers. Under World Trade Organization rules, a country may impose retaliatory measures if it believes another’s tariffs are unjustified, a principle Canada is invoking now. Historically, the North American metal market has been tightly integrated, with the United States, Canada and Mexico accounting for the majority of each other's steel and aluminum trade. Disruptions can therefore have broader implications for the continent’s manufacturing sector.

Analysts note that while the immediate fiscal impact is measured in the tens of billions, the longer‑term effect could be a slowdown in cross‑border investment and a push for firms to diversify their supply sources. Both governments have signaled a willingness to negotiate, but the path to de‑escalation remains uncertain as each side tests the limits of trade policy tools.

The tariffs will remain in place pending a formal dispute‑resolution process, and both Ottawa and Washington have indicated they will monitor the economic fallout closely.