Canada will impose dollar-for-dollar counter-tariffs on $27.6 billion worth of U.S. goods starting September 8, after trade talks with Washington collapsed and the U.S. moved to slap a 50 per cent tariff on Canadian exports. Ottawa is pairing the retaliation with a $7.5 billion support package for workers and businesses, on top of nearly $25 billion already committed since the trade fight began.
It’s not the first time Canada has run this play. Between 2018 and 2019, Canada matched U.S. steel and aluminum tariffs with its own retaliatory measures for almost exactly a year before both sides stood down. That earlier round has already been studied closely by Statistics Canada and academic economists, and the numbers offer a rare, evidence-based preview of what this new, larger fight could cost — a question none of Tuesday’s announcement coverage actually answered.
A much wider net than 2018
The 2018-19 dispute was narrow: the U.S. taxed Canadian steel at 25 per cent and aluminum at 10 per cent, and Canada mirrored that with matching tariffs on a relatively contained list of American products. This round is structurally different. Finance Minister François-Philippe Champagne’s countermeasures span steel, dairy, home appliances, agricultural equipment, pulp and paper, electronics, furniture, and clothing, with rates of 15, 25 or 50 per cent depending on the product. Some categories — steel and aluminum derivatives, furniture, apparel — are being hit at 50 per cent, double the harshest rate Canada applied in 2018. That breadth matters: a tariff war confined to industrial metals mostly hits business balance sheets, while one that reaches dairy, appliances and clothing shows up directly on store shelves.
What the last tariff war actually cost
Research published in Canadian Public Policy and Statistics Canada’s own trade analysis give a concrete accounting of the 2018-19 fight. Relative to non-tariffed goods, the value and volume of Canadian steel and aluminum exports fell by roughly half once tariffs took hold, with about $16.6 billion in exports affected. The distortion to domestic supply and demand — economists’ measure of pure economic waste from the tariffs, separate from who “won” or “lost” — averaged about $42 million a month and topped $464 million by the time both countries dropped their tariffs in May 2019. On the consumer side, the damage was real but contained: because only about 13 per cent of the average Canadian’s consumption basket is exposed to imported goods, the inflationary hit stayed modest even as input costs rose for manufacturers. Producers also weren’t defenseless — many rerouted steel and aluminum shipments to Mexico, the U.K. and China to offset lost U.S. sales.
The open questions this time
Those cushioning factors are exactly what’s uncertain heading into September. Rerouting worked in 2018 partly because global trade conditions were calmer; today’s tariff-heavy environment gives Canadian exporters fewer easy alternative markets to absorb redirected goods. And because this round explicitly targets consumer categories like dairy and appliances rather than just industrial inputs, the 13-per-cent import-exposure buffer that kept 2018’s inflation impact modest may not hold the same way. Ottawa’s $7.5 billion package — built around EI flexibility, a new Worker Retention and Retraining Program, and the $2 billion Canada Strong Diversification Fund — is essentially a bet that faster, targeted support can do what rerouted exports did last time. Whether it works will depend on how long the standoff runs past September 8, and whether trade talks with Washington resume before the deadweight losses start compounding the way they did last time.
Attribution: via Department of Finance Canada and CP24 News. Original coverage: cp24.com. Official release: canada.ca.
Sourcing notes: Core facts (tariff rates, effective date, $27.6B and $7.5B figures) verified against two independent sources — the official Dept. of Finance Canada release and CP24 News coverage of the same announcement. Historical 2018-19 comparison data sourced from Statistics Canada’s trade analysis and the peer-reviewed article “The Cost of Standing Up to Protectionism: Price and Welfare Impacts of Canada’s 2018 Retaliatory Tariffs” (Canadian Public Policy). No fabricated figures. Note: this article was drafted 2026-08-25 during a Zapier outage and stashed in Slack; recovered and published once Zapier access was restored.
