Canada didn't just retaliate. It copied the tariff schedule line by line.

What happened. Talks collapsed late on Friday, 21 August. The following day, the United States imposed a 50% tariff on $27.6 billion of Canadian goods under Section 338. On Tuesday, 25 August, Finance Minister François-Philippe Champagne set out Canada's response: counter-tariffs on roughly 700 American products, in three bands: 15%, 25% and 50% effective 12:01 a.m. on 8 September 2026.

The design is the story. Champagne's description was precise: the measures match US tariffs "dollar for dollar, rate for rate." That is not rhetoric; it is a specification. The dollar value is matched against the $27.6 billion Washington hit. The rates are matched band for band. Where Canada already had countertariffs at a lower level, steel and aluminum sat at 25%; they are being raised to 50% specifically to match the American rate, not to exceed it.

What sits in each band. The 50% band covers steel and aluminum, furniture, clothing and apparel, and a long consumer tail: perfumes and makeup, smartphones, milk products, tableware and kitchenware, plywood and paper products, honey, molasses and malt extract, doors, windows and frames, and cutlery. The 25% band covers seafood, large kitchen appliances, cheese and curd, carpets and textiles, and certain steel and aluminum derivatives. The 15% band is narrow air-conditioning machines.

Who actually pays. A tariff is collected at the border from the importer, not the exporter. A 50% Canadian surtax on American cutlery is paid by the Canadian firm bringing it in and passed toward Canadian buyers. The pressure on the American producer is indirect: their goods become less competitive in a market they had been selling into. This is why the consumer tail matters. Steel and aluminum hurt industrial supply chains; makeup, smartphones, and kitchenware are felt on shelves, quickly and visibly, on both sides of the argument.

Why matching is not the same as maximizing. Ottawa could have gone further. It has not. Matching produces three properties that escalation does not. It is legible; every Canadian rate can be traced to an American one, so nobody has to argue about proportionality. It is capped, matching its own ceiling, and Canada cannot drift into an escalation it did not choose. And it is reversible — a mirror can be dismantled the moment the thing it reflects is dismantled, without either side conceding anything beyond what the other concedes.

The exemption that shows the intent. The list contains no energy countermeasures. Canada is the largest supplier of crude oil to the United States, which is the single most powerful lever it holds. Leaving it untouched, in a package explicitly framed as matching, is a deliberate signal: this is a calibrated response inside an existing framework, not the opening of a wider front. Read alongside the mirror design, the omission says the door is being held open.

Why the effective date matters. The measures were announced on 25 August and take effect on 8 September. That is a fourteen-day gap, and it is not administrative lead time. It is a negotiating window, publicly scheduled. Both governments now have a fortnight in which the American tariffs could be withdrawn and the Canadian mirror could be dismantled before a single dollar is collected. Champagne's characterization of the rejected American proposal, "They asked too much of Canada and offered too little," describes a negotiation that failed, not one that has ended.

What this does to the numbers. Roughly $27.6 billion of trade in each direction now carries a surtax at rates up to 50%. For context, that is a fraction of the Canada–US goods relationship, which runs into the hundreds of billions annually. This is a targeted package, not a general trade embargo. But the categories are chosen for visibility rather than volume, which means the political effect will run ahead of the macroeconomic one.

What happens next is checkable. Three dates and one number. Whether the American tariffs are withdrawn before 8 September — that is the test of whether the window was real. Whether the Canadian order takes effect as published at 12:01 a.m. that day, unchanged. Whether either side extends into energy, which would mark the end of the matching logic. And the number to watch afterwards is import volumes in the 50% categories: a mirror tariff that produces no trade diversion has failed as leverage, and one that produces a great deal has succeeded at a cost to Canadian buyers.