Canada’s dollar-for-dollar surtaxes on C$27.6 billion of American goods take effect at 12:01 a.m. Tuesday, but as of Monday morning importers and brokers still had no Order in Council and no CBSA customs notice to file against
OTTAWA, September 7, 2026
Canada’s largest single act of trade retaliation in the current dispute with the United States becomes law in less than 24 hours, and the customs brokers who will have to administer it spent the weekend without the legal instrument that creates it.
At 12:01 a.m. Eastern on Tuesday, September 8, surtaxes of 15, 25 and 50 per cent attach to roughly C$27.6 billion worth of United States goods entering Canada. The Department of Finance announced the measure on August 25, framing it as an exact mirror of Washington’s action: every American product on the list carries the same rate the United States applied to the equivalent Canadian good. Finance Minister François-Philippe Champagne put the formula plainly when he announced it. “Today, I’m announcing that Canada will match the US tariffs dollar for dollar, rate for rate,” he said, according to reporting by Wood Central and Bernama.
What has not arrived is the paperwork. On September 4, the Canada Border Services Agency advised the Canadian Society of Customs Brokers that implementation guidance would not be released before September 7. The reason is procedural but consequential. As the customs brokerage Buckland set out in a client advisory citing the CSCB, the counter-tariffs “must first be approved and published through an Order in Council (OIC) before the CBSA can issue its related Customs Notice and implementation guidance,” and “the CBSA does not expect the required Order in Council to be approved and published prior to September 7, 2026.”
The practical effect is that importers may have a single business day, and possibly only a few hours of it, to reconcile the government’s published product list against the operative legal text, load new classifications into their systems, and decide which shipments to accelerate, hold or reroute. Buckland’s advice to clients was blunt: avoid relying on preliminary information as final implementation guidance until the official Order in Council and Customs Notice are released.
How the measure is built
The architecture of Canada’s response is deliberately symmetrical. Finance Canada’s published list assigns each targeted American product the rate that Washington assigned to its Canadian counterpart, producing three tiers rather than a single across-the-board figure.
The 50 per cent tier is the largest and captures the goods Ottawa considers most closely tied to the American measures. According to a product-level analysis published by Blake, Cassels & Graydon LLP, it includes steel and aluminum in primary and semi-finished forms, covering ingots, bars, rods, wire, tubes and pipes; dairy concentrates, milk powders, whey products and casein; chemical wood pulp, envelopes and cartons; plywood, veneered panels and laminated wood; consumer electronics including smartphones, monitors and video game consoles; apparel across suits, jackets, dresses, shirts, sweaters and gloves; plastics and rubber articles such as floor coverings, tableware and bags; cosmetics and personal care products including perfumes, make-up and hair preparations; and sports equipment such as golf clubs and exercise machines.
The 25 per cent tier covers sawn coniferous wood and softwood lumber, plywood in certain forms, household articles of steel and aluminum including cookware and kitchenware, washing machines and dryers and dishwasher parts, carpets and textile floor coverings, knives and cutlery, and cheeses.
The 15 per cent tier is the narrowest and lands on capital equipment: fork-lift trucks and industrial handling equipment, parts for harvesting and agricultural machinery, air conditioners, and moulds for metal, rubber and plastics.
The Blakes timeline bulletin, in its version dated September 4, counts 629 HS codes on the revised list. Several news outlets have described the measure as covering more than 700 American products, a figure that traces to the government’s own framing on August 25 and counts products rather than tariff lines. Wood Central, reviewing the forest products chapters, reported that the list was cut down from 874 items published on August 26 after fish and seafood were removed.
Two structural features matter more to importers than the headline rates.
The first is that the new surtaxes are not designed to stack. Blakes reports that the Department of Finance has told stakeholders the new tariffs are not intended to apply in addition to existing measures. Where Canada already imposed a 25 per cent counter-tariff on American steel and aluminum, that rate rises to 50 per cent to match the American figure rather than compounding on top of it. Existing counter-tariffs outside the new list, including the surtax on American motor vehicles that has been in force since April 9, 2025 under the United States Surtax Order (Motor Vehicles 2025), remain in place independently.
The second is the origin test. The surtaxes apply only to goods that qualify to be marked as United States goods under the Determination of Country of Origin for the Purpose of Marking Goods (CUSMA Countries) Regulations. The customs brokerage GHY has flagged a trap in that construction: American-origin goods that do not qualify for CUSMA preferential treatment may end up paying both the most-favoured-nation duty and the new countermeasure duty, a double exposure that will not be obvious from the product list alone.
Goods already in transit to Canada on the day the measures come into force are exempt. Importers claiming that exemption will need documentation establishing shipment status and timing, and both GHY and the brokerage community have warned that the burden of proof sits with the importer.
Relief exists, but the cash-flow timing is punishing
Ottawa has left its existing remission machinery in place and intends to extend it to the new measures. Finance Canada’s guidance, quoted by GHY, states that “Product and company-specific remission that has been implemented under the United States Surtax Remission Order will apply to the new tariff measures, in accordance with the terms of the Order. For example, steel goods currently eligible for remission of the 25% tariff would benefit from relief of the 50% tariff.” That extension is subject to Governor in Council approval, which is part of the same package of instruments that had not been published as of the weekend.
New remission requests remain available under the government’s framework for cases where inputs cannot be sourced domestically. The government also extended horizontal relief earlier this summer. Amendments to the United States Surtax Remission Order (2025), registered as SOR/2026-154 and published in the Canada Gazette on July 1, pushed relief that was set to expire on June 30, 2026 out to July 1, 2027 for aluminum and steel goods and motor vehicles used for public health, health care, public safety and national security purposes; aluminum goods used in manufacturing, processing, food and beverage packaging or agricultural production; and aluminum and steel goods used in manufacturing motor vehicles, aerospace products and related parts. A companion instrument, SOR/2026-155, extended the auto and aerospace input exemption under the Steel Derivative Goods Surtax Order by the same year.
The operational warning from the brokerage community concerns how relief is claimed rather than whether it exists. Both GHY and the trade advisory firm CentsIQ have stressed that remission should be claimed at the time of entry through an authorization code on the customs declaration. Claiming it afterward, through a refund application, means waiting several months for money back. For a mid-sized importer bringing in American steel inputs at a 50 per cent surtax, the difference between a code at the border and a refund claim in the spring is a working capital problem, not an accounting one.
What triggered it
The sequence that produced Tuesday’s measures ran fast.
On July 20, President Donald Trump signed three presidential proclamations imposing an additional 50 per cent tariff on a broad range of Canadian goods, using Section 338 of the Tariff Act of 1930. According to a client advisory from C.H. Robinson, the proclamations were numbered 11046 covering alcoholic beverages, 11047 covering dairy and 11048 covering motor vehicles. Multiple law firms, including Holland & Knight and Wiley, have noted that no president had used Section 338 to impose tariffs since the provision was enacted in 1930. Bloomberg described it as a never-before-used clause of a 1930 law.
The tariffs were originally scheduled for August 19 and were suspended for three days at the last minute. In the interval, negotiations that had been running for months collapsed.
Prime Minister Mark Carney announced the break in a statement issued from Ottawa on the night of August 21. “Throughout, our goal has been to secure the best deal for Canadians, never a deal at any price or on any deadline,” he said. “However, that progress has not been enough to meet our objectives for Canadians. As a result, this evening, I have decided to suspend trade negotiations with the U.S. and have directed Canada’s negotiators to return to Ottawa. They have worked hard, in good faith, to defend the interests of Canadians throughout these negotiations up until the very last minute. However, last-minute changes in the U.S. proposed terms were unfair, uneconomic, and called into question the reliability of any deal.”
The American tariffs took effect at 12:01 a.m. on August 22. Carney’s account of the sticking points, given to reporters and reported by Bloomberg, identified three: Washington offered to lower the 25 per cent tariff on non-American vehicle content to 15 per cent but refused to extend relief to medium and heavy-duty trucks, a category that includes production slated for Ford’s plant near Toronto; the United States sought limits on Canada’s trade agreements with third countries; and American negotiators pressed demands on cultural and French-language matters that Ottawa found unacceptable.
Carney’s language that week was unusually direct for a prime minister discussing a treaty partner. “You’re at war when you get attacked. We got attacked,” he told reporters in Ottawa, according to Bloomberg reporting carried by SupplyChainBrain. He also said the government took the retaliatory step “reluctantly,” acknowledging it would raise costs for Canadians, hit American companies that had done nothing, and make cooperation between the two countries harder.
Three days later, Champagne announced the counter-tariff list alongside a support package.
Ottawa’s cushion
The C$7.5 billion package announced on August 25 sits on top of what Finance Canada describes as nearly C$25 billion in support provided since the American tariffs began. Its components are aimed at liquidity and labour rather than at compensating for tariff costs directly.
The Regional Tariff Response Initiative received an additional C$1.5 billion, delivered through the regional development agencies. The Business Development Bank of Canada opened a C$500 million liquidity stream branded Pivot to Grow, with targeted programs for forestry, steel and aluminum, and lowered the minimum revenue threshold for applicants to C$1 million. A new Canada Strong Diversification Fund received C$2 billion for shovel-ready projects and capital maintenance, administered through the Strategic Response Fund. C$3.5 billion went to what the government calls Rapid Response Supports for Workers and Employers, including extended Employment Insurance flexibilities, workplace training and a new Worker Retention and Retraining Program. The Large Enterprise Tariff Loan Facility, administered by the Canada Enterprise Emergency Funding Corporation, received additional flexibilities.
Champagne tied the package to the retaliation in a single sentence. “When the United States asked too much and offered too little, we chose to stand up for Canadians,” he said in the Finance Canada release. “Our dollar-for-dollar, rate for rate counter-tariffs as well as a multi-billion dollar support package will protect workers, farmers, families, and businesses as we build a stronger, more resilient, and more diversified Canadian economy.”
Dominic LeBlanc, President of the King’s Privy Council for Canada and the minister responsible for Canada-United States trade, used the same release to make the political case. “Canadians expect their government to stand up for them and their interests,” he said. “As the United States impose unjustified tariffs, Canada’s government is focused on building our strength at home and protecting our economy.”
The reaction is not uniformly supportive
Business groups have split their response along a predictable line: broad endorsement of the principle, sharp criticism of the design.
Dan Kelly, president of the Canadian Federation of Independent Business, delivered the toughest assessment of the relief architecture. “While we appreciate that the government is trying to move quickly, at first glance it looks like small business owners are being served the usual alphabet soup of complicated programs,” he said in a statement on August 25. “They will be challenging for small business owners to figure out, let alone use.”
Kelly also raised the point that most coverage of Canadian retaliation has underweighted. “While I respect Canada’s need to respond to the U.S. threat, the giant list of counter tariffs will create their own severe challenges for many small businesses who have already done what they can to seek new sources of supply,” he said. “Canada’s support programs need to be available for companies that use, import or distribute U.S. products too.”
CFIB attached a specific ask to that statement: extend the suspension of the federal excise tax on gasoline and diesel, which was set to expire on September 7, one day before the counter-tariffs took hold. Kelly called the timing the worst possible. On September 4, according to a GHY advisory, the government extended the suspension to January 2027.
Dennis Darby, president and chief executive of Canadian Manufacturers and Exporters, made the same structural point from the manufacturing side. “Canada has every right to respond to unjustified U.S. tariffs,” he said in an August 25 statement. “However, counter-tariffs can also increase costs for Canadian manufacturers that depend on U.S. inputs, particularly small manufacturers with limited ability to change their supply chains. The government must continue providing timely tariff remission where essential goods cannot be sourced competitively or efficiently in Canada.”
Darby has also put a figure on the damage already done. He has said that even before the new tariffs, Canadian exports to the United States had fallen roughly 15 per cent over the previous year, accompanied by tens of thousands of layoffs.
Candace Laing, president and chief executive of the Canadian Chamber of Commerce and a member of the Prime Minister’s Advisory Committee on Canada-United States Economic Relations, framed the American action rather than the Canadian one, but her assessment of the arithmetic applies in both directions. “A whopping, non-absorbable tariff is not sustainable or viable for business,” she said on August 22. “For a small Canadian exporter operating on tight margins, this isn’t an abstract trade dispute. It means looking at your orders, your payroll and your employees and asking what you can still afford.”
Labour has pushed for more. Lana Payne, national president of Unifor, welcomed the countermeasures and immediately asked for an industrial strategy to go with them. “The Canadian counter-tariffs are a good first response, but we need to take action at home to keep workers on the job by fast-tracking procurement dollars, implementing national industrial strategies, and calling on corporate Canada to step up and Buy Canadian,” she said in an August 25 release.
On the dairy file, where Canada is being tariffed and is tariffing simultaneously, David Wiens, president of Dairy Farmers of Canada, told Cheese Reporter that Canadians “believe in the importance of having control over our food supply and ensuring that Canada’s strong domestic dairy sector is not compromised.” Mathieu Frigon, president and chief executive of the Dairy Processors Association of Canada, pointed to the underlying balance. “The trade relationship in dairy already massively favors the United States,” he said.
The economics, and the friendly fire
The macro estimates are modest relative to the rhetoric. TD Securities has estimated that the Section 338 tariffs plus Canadian retaliation will remove roughly 0.3 percentage points from Canadian gross domestic product by 2027. National Bank has put 100,000 to 130,000 Canadian jobs at risk if the tariffs persist and governments do not cushion the shock, with unemployment rising about half a percentage point from 6.4 per cent. No major Canadian bank is forecasting a recession from the measures; the prevailing characterisation is a severe sectoral shock with contained macroeconomic consequences.
Markets have been similarly unmoved. On the day Champagne announced the counter-tariffs, the S&P/TSX Composite rose 0.6 per cent and the Canadian dollar was essentially flat, according to Al Jazeera. The currency was trading near C$1.38 to the American dollar as the measures approached.
Incidence estimates favour Canada’s position. The Kiel Institute for the World Economy has calculated that American importers and consumers absorb 96 per cent of the burden of American tariffs, a figure Al Jazeera cited in its coverage. Statistics Canada data puts Canada’s trade surplus with the United States at C$9.9 billion, roughly US$7.1 billion, a fraction of the deficit figures the administration has cited publicly.
Public opinion is behind the harder line. A Leger survey of 1,622 Canadian residents conducted August 15 to 17 found 56 per cent wanted the government to take a hard line and make no further concessions, against roughly a third favouring flexibility. Support was highest in Quebec at 61 per cent and lowest in Alberta at 46 per cent.
None of that changes the position of the Canadian firms caught by their own government’s list. Derek Friesen, who owns PhiBer Manufacturing in Manitoba, told CBC that the trailers making up roughly 70 per cent of his sales are built on frames imported from Iowa, frames that will carry a Canadian surtax starting Tuesday. It is the cleanest available illustration of the warning CFIB and CME have both issued: Canada has more import-dependent small businesses than export-dependent ones, and a mirrored tariff list hits both sides of that ledger.
What importers should do this week
Three actions are time-sensitive.
First, confirm classification and origin before the notice lands. The surtax attaches on the basis of the marking regulations, not on CUSMA preferential origin, and the two tests can diverge. Importers who have been managing CUSMA compliance for preference purposes should not assume that work answers the surtax question.
Second, document in-transit status now for anything crossing this week. The exemption is available but evidentiary, and there will be no retroactive generosity for shipments whose paperwork is thin.
Third, map remission eligibility against the existing United States Surtax Remission Order before filing, and secure the authorization code at entry. The alternative is financing the government’s surtax for several months.
Beyond the immediate week, the structural exposure is that the measures on both sides now reach goods that satisfy CUSMA rules of origin. As McMillan LLP noted in a July bulletin, the American Section 232 national security tariffs “do not exempt Canadian products, even if those products meet the CUSMA rules of origin.” The same is true in reverse for much of what takes effect on Tuesday. Preference utilisation, long the central compliance metric for cross-border trade, is becoming a weaker proxy for actual tariff exposure than it has been at any point since the agreement entered into force.
The government’s remaining discretion sits in the remission framework, and that is where the next several months of lobbying will concentrate. Champagne’s officials have signalled openness to requests where inputs are genuinely unavailable in Canada. Whether that discretion is exercised quickly enough to matter for firms operating on thirty-day terms is the question the brokerage community was asking over the weekend, and it is the same question it was asking about the Order in Council.