Fifty percent tariffs on Canadian imports officially took effect after a deadline passed without a trade agreement, marking a significant escalation in the economic dispute between the United States and Canada. Last-minute talks between the Trump administration and Canadian Prime Minister Mark Carney's government failed to bridge the gap, ending hopes of a negotiated reprieve.

The tariffs, which represent a dramatic increase from prior rates, cover a broad range of Canadian goods and are expected to raise costs for American businesses and consumers who rely on Canadian imports. Canada is one of the United States' largest trading partners, and economists have warned that a prolonged standoff could disrupt supply chains in industries ranging from energy and agriculture to manufacturing and automotive production.

Canadian officials expressed frustration with the breakdown, signaling that Ottawa would consider retaliatory measures in response to the new duties. The Carney government had pushed for a negotiated framework that would address U.S. concerns without resorting to sweeping tariff increases, but those efforts ultimately fell short ahead of the deadline.

The failure of negotiations marks a new low point in U.S.-Canada trade relations, a relationship historically characterized by deep economic integration under successive free trade agreements. The situation has drawn comparisons to earlier trade disputes during Trump's first term, though analysts note the current tariff levels are substantially higher.

Markets reacted with concern to the news, and business groups on both sides of the border called on governments to resume talks. The coming weeks are expected to bring further clarity on whether either side is prepared to return to the negotiating table or whether the tariffs will remain in place for the foreseeable future.