A new tariff wall just went up between the US and Canada

At 12:01 a.m. on September 8, Canada imposed counter-tariffs of 15%, 25%, or 50% on roughly $27.6 billion of US imports across about 700 product classifications — matching, dollar-for-dollar, the US rates on the same goods. The heaviest hit lands on metals: existing Canadian counter-tariffs on US steel and aluminum jumped from 25% to 50%. Other targeted sectors read like a distributor’s catalog — agricultural equipment, appliances, pulp and paper, plastics, electronics, furniture, and dairy. Ottawa paired the move with a $7.5 billion support package for affected businesses, and exempted goods already in transit.

The retaliation answers a US escalation. On August 22, after trade talks collapsed, the US imposed an additional 50% tariff on roughly $20 billion of Canadian goods under Section 338 of the Tariff Act of 1930 — a provision that had gone unused since 1949. Canada called its response “dollar for dollar.” For anyone sourcing across the border, the practical takeaway is volatility: rates are now moving in tit-for-tat steps, and the legal tools being reached for are older and blunter than the modern Section 232/301 regime distributors had adapted to.