Canada Announces Retaliatory Tariffs

Most of the coverage this week has focused on what Washington did to Canadian exporters. That's the wrong half of the story for anyone running a Canadian business.

The measure that will show up in your landed cost on September 8 is Canada's. Ottawa's counter-tariffs apply to U.S. goods coming into Canada at 15, 25 and 50 per cent, across roughly 700 products by the government's count and closer to 900 tariff lines by others. If you buy American inputs, and most Canadian manufacturers, processors and technology firms do, your cost base moves on that date.

U.S. duties compress your revenue on what you sell south. Canadian counter-duties raise your cost on what you buy north. Dennis Darby of Canadian Manufacturers & Exporters made exactly this point when the measures landed, warning that counter-tariffs raise costs for Canadian manufacturers who depend on U.S. inputs, particularly smaller firms with limited ability to reroute supply.

Here's what was actually announced, what it means sector by sector, and what belongs on your executive agenda before September 8.

What happened

Canada and the United States were negotiating through late August. On the night of August 21, talks collapsed. Ottawa's account is that the U.S. proposed terms asking too much of Canada and offering too little in return, and that Canada suspended negotiations rather than accept a bad deal. Prime Minister Carney called the resulting tariffs a miscalculation and described the U.S. demands as uneconomic and unfair.

At 12:01 a.m. on August 22, additional U.S. tariffs of 50 per cent took effect on roughly C$27.6 billion of Canadian goods. Those tariffs flow from three presidential proclamations signed July 20, framed around motor vehicles, dairy and alcoholic beverages. The framing is narrower than the reality. The product lists reach well past those three sectors, covering 554 Canadian tariff lines by one count, and reaching products as varied as cement, hockey sticks and industrial textiles.

The original effective date was August 19. A proclamation signed August 18 suspended the duties temporarily to allow a final round of talks, which is how the date moved to August 22.

Scale matters here, and it cuts against the headlines. USTR puts the covered trade at roughly US$20 billion annually. Analysts estimate that's about 4 to 5 per cent of Canadian exports to the United States, with more than 85 per cent still entering duty-free under CUSMA. This is a concentrated hit rather than a broad one. Which means the first question for any executive team is narrow and factual: are we in the 4 per cent or not.

On August 25, Finance Minister François-Philippe Champagne confirmed Canada would match dollar for dollar and rate for rate. Effective September 8, Canada imposes counter-tariffs of 15, 25 and 50 per cent on U.S. products drawn from those hit by the U.S. measures, with each product's Canadian rate mirroring its U.S. rate. Coverage totals C$27.6 billion of imports, concentrated in steel, dairy, appliances, agricultural equipment, pulp and paper, and electronics.

Alongside it came a C$7.5 billion support package, layered on nearly C$25 billion already deployed over the previous 18 months.

Existing counter-tariffs, including those on autos, stay where they are.

The legal architecture matters more than the rate

Two structural changes deserve board-level attention. Both are easy to miss in the noise about percentages.

CUSMA compliance no longer shields these goods. For 18 months, the working assumption across Canadian industry was that qualifying under CUSMA kept you out of the tariff, and the data supported it. RBC, working from U.S. Census figures, tracked the share of Canadian exports crossing duty-free rising above 90 per cent through 2025 as firms completed origin paperwork. The new U.S. tariffs apply regardless of CUSMA origin. If your trade compliance strategy has been built around certification, and for a great many Canadian exporters it has, that strategy just stopped working for the covered lines.

The authority changed. These tariffs are imposed under section 338 of the Tariff Act of 1930, better known as Smoot-Hawley. It lets the President impose additional duties of up to 50 per cent on a country found to have discriminated against U.S. commerce.

That's a deliberate shift, and the history is worth knowing. In February 2026, the U.S. Supreme Court struck down the tariffs levied under the International Emergency Economic Powers Act, finding them invalid. Section 232 tariffs on steel, aluminum, autos, copper, lumber, semiconductors and pharmaceuticals survived that ruling because they rest on different statutory ground. Section 338 is a third route, and until July 2026 it had never once been used to impose tariffs in its 96-year existence. U.S. officials threatened it against France, Spain, Germany, Australia and Japan in the 1930s and 1940s, then stopped referring to it entirely after 1949, when the GATT made it largely redundant. Morrison Foerster notes that no court appears to have ever interpreted the provision.

Two features make it hard to plan around. It requires no investigation and no consultation with the targeted country before duties are imposed. And the statute doesn't define discrimination, so there's no body of case law setting limits on its reach.

Why does that matter to a CEO rather than a trade lawyer? Because an untested legal authority carries litigation risk, and litigation risk is planning risk. The IEEPA tariffs ran for nearly a year before the Court invalidated them. Companies that assumed permanence made capital decisions they later regretted. Companies that assumed collapse got caught paying duties they hadn't budgeted. Neither assumption is safe here. There is also no expiry date attached to these measures.

There's a third piece of context worth holding. On July 1, 2026, the CUSMA Free Trade Commission conducted the first six-year joint review. The U.S. declined to extend the agreement for a further 16-year term. CUSMA remains in force until 2036, but the parties are now locked into annual reviews. The agreement that has anchored North American supply chain planning since 2020 is on a year-to-year footing.

What's excluded, and why that's strategically significant

The U.S. measures carve out energy, potash, fish and critical minerals, along with anything already captured by Section 232.

Read that list carefully. It's not arbitrary. Those are the categories where the U.S. either depends on Canadian supply or has already built a separate tariff wall. The carve-outs tell you where Washington believes it holds the stronger hand and where it doesn't.

For an executive team, that's usable intelligence. If your product sits in an excluded category, your near-term exposure is indirect, running through input costs, currency and customer demand rather than a duty at the border. If it doesn't, you're in the direct-hit category and the exclusions tell you which arguments have already worked on the U.S. side.

Sector by sector

Manufacturing

Manufacturing takes the squeeze from both directions, and it's the sector where the September 8 date bites hardest.

On the export side, the U.S. lists reach deep into industrial production: machinery including hydraulic turbines, refrigeration equipment and agricultural machinery; industrial chemicals and fuel additives; plastics packaging, rubber seals and gaskets; industrial textiles; wood and paper products including pulp, boxes and labels.

On the import side, Canada's counter-tariffs hit steel and aluminum products at 50 per cent, up from the 25 per cent that previously applied. Appliances, agricultural equipment, pulp and paper, and certain steel and aluminum derivatives land at 25 per cent.

Then there's a compounding effect most cost models miss. Customs brokers are flagging that a product of U.S. origin that doesn't qualify under CUSMA can face both the most-favoured-nation rate and the new countermeasure duty. Origin, classification and CUSMA eligibility all need to be confirmed together to see true exposure. Firms that check only one of the three will underestimate.

Manufacturing has a second file worth watching. Commerce opened Section 232 investigations into robotics and industrial machinery on September 2, 2025, alongside a parallel probe into medical equipment. Neither has produced a proclamation as of this writing. Companies importing production equipment into the U.S., or exporting it there, have a window to make submissions that closes the moment one is signed.

If you run a manufacturing business, the practical question before September 8 is narrow: which specific tariff lines in your bill of materials are on the September 8 list, and what's the landed cost delta per unit. Everything else is downstream of that number.

Technology

The tech read is a tale of two businesses.

Hardware is directly exposed. Phones, cameras, monitors, circuit boards and GPS devices sit on the U.S. list. Canadian counter-tariffs name electronics as a target category. If you build, assemble or distribute physical devices across the border, you're in it from both sides.

Semiconductors sit on a separate track under Section 232, at 25 per cent. The Trade Commissioner Service describes that measure as applying to a narrow subset of semiconductors and derivatives, with exemptions for goods used in U.S. domestic production, data centres, research and development, and certain consumer and civil industrial applications. If chips are in your bill of materials, the exemption structure is worth reading closely rather than assuming exposure.

Software and services are not. Tariffs apply to physical goods crossing a border. SaaS revenue, licensing, cloud services and professional services don't attract duty.

That asymmetry is worth naming plainly at the executive level, because it creates a structural advantage for Canadian technology firms with services-weighted revenue at exactly the moment their hardware-exposed competitors are absorbing cost shocks. It also sharpens a strategic question some boards have been circling for a while: how much of the business is goods and how much is service, and does the current environment change the answer.

One caution. The absence of tariffs on digital services doesn't mean the absence of policy risk. Canada rescinded its Digital Services Tax in June 2025 to keep negotiations alive. Digital trade is a live file in any renewed negotiation, and it sits outside the tariff schedule entirely.

Energy

Energy is the clearest relative winner, and Canadian energy executives should understand precisely why before they relax.

Energy is excluded from the new U.S. tariffs. So are critical minerals and potash. Canadian energy exports keep tariff-free access on the covered measures.

The exposure runs through capital cost instead. Canada's counter-tariffs put 50 per cent on U.S. steel and aluminum products and 25 per cent on certain derivatives. Energy infrastructure is steel-intensive. Transmission builds, storage installations, nuclear refurbishment and pipeline work all consume large volumes of fabricated metal, and a meaningful share of specialized components come from U.S. suppliers. Hydraulic turbines appear on the U.S. list.

For project developers, this lands in the middle of the largest electricity build Ontario has run in decades. Cost assumptions baked into bids submitted months ago now need re-examination. Where an escalation clause exists, this is when it earns its keep. Where one doesn't, the conversation with the counterparty should be happening now rather than after the first invoice.

The strategic opportunity is real, though. Being on the excluded list during a trade conflict is a position of strength in Washington and in Ottawa alike. Energy firms are better placed than they've been in years, and positions like that decay if they aren't used.

Pharmaceuticals and healthcare

Pharma sits outside the Section 338 measures, for a reason that offers no comfort. Patented pharmaceuticals were already captured under a separate Section 232 action, so there was nothing left to add.

The April 2, 2026 proclamation covers patented pharmaceuticals listed in the FDA's Orange Book or Purple Book, along with their active ingredients and key raw materials. The standard rate is 100 per cent.

The implementation is staged, and the proclamation text is explicit about it. Duties took effect at 12:01 a.m. on July 31, 2026 for the companies named in Annex III, and take effect September 29, 2026 for all other companies. For most Canadian-connected importers, that second date is the one that matters, and it lands three weeks after Canada's counter-tariffs.

The rate structure rewards negotiation, which is the point of it. Products from the EU, Japan, South Korea and Switzerland face 15 per cent under existing trade commitments, and the UK 10 per cent. Companies with a Commerce-approved onshoring plan face 20 per cent. Companies that combine an onshoring agreement with a most-favoured-nation pricing agreement with HHS reach zero through January 20, 2029.

Generic pharmaceuticals and their ingredients are excluded from Section 232 tariffs, in the proclamation's own words, at this time. Law firm analyses read biosimilars as excluded as well. That carve-out shelters a large share of Canadian generic manufacturing, and the qualifier at this time is doing real work in that sentence.

Healthcare providers and distributors face a quieter problem. Canada's remission for goods used for public health, healthcare, public safety and national security purposes ran to June 30, 2026 under the December 2025 extension. Institutions that built procurement budgets around that relief should verify their current position before assuming it carries forward.

Medical technology is the file to watch. Commerce initiated a Section 232 investigation on September 2, 2025 covering personal protective equipment, medical consumables and medical equipment including devices, and it remains listed as open. No proclamation has been issued as of this writing. Companies in that space still have a window to shape the outcome, and it closes the moment one is signed.

Food and beverage

Food and beverage absorbed the most pointed political targeting, because two of the three U.S. proclamations name the sector directly.

The Dairy Proclamation attacks Canada's tariff rate quota system. Its product list runs to milk and cream powder, concentrated dairy products, casein and whey, molasses and glucose, fructose and lactose syrups, bakery mixes and doughs, non-alcoholic beer, hop cones and peppermint essential oils. The Alcohol Proclamation responds to provincial liquor boards pulling U.S. products from shelves, and covers beer, wine and spirits, plus a scattering of items with no obvious connection to alcohol, including hockey equipment, wooden kitchenware and certain papers.

Note what the dairy dispute actually turns on. The U.S. position is that Canada discriminates by restricting quota eligibility to producers, processors and distributors while excluding retailers. This is a long-running disagreement, and a binational panel found in Canada's favour under the CUSMA dispute mechanism in 2023. The U.S. has now routed around the dispute mechanism using domestic tariff authority.

Canadian counter-tariffs hit U.S. dairy including cheese, along with fish and seafood, at 25 per cent. Food processors buying American dairy inputs face higher costs from September 8. A separate 10 per cent provisional safeguard on canned vegetable imports has been running since June 19, excluding the U.S., Mexico, Chile, Israel and developing countries.

For food and beverage executives, the honest read is that supply management is now the explicit target of U.S. trade policy. Whatever your position on the system, plan for the possibility that it becomes a bargaining chip in any resumed negotiation. Companies whose business models assume its permanence should stress-test that assumption.

Defence

Defence is the sector where the news is mostly opportunity, and where the least executive attention is currently being paid relative to the dollars in play.

Defence isn't a meaningful tariff story. It's a procurement story, and the procurement numbers are extraordinary.

Canada announced in March 2026 that it had hit the NATO 2 per cent of GDP target for the first time, spending roughly C$63 billion in 2025-26, described as the largest year-over-year increase in generations. Budget 2025 allocated C$81.8 billion over five years. The commitment runs to 5 per cent of GDP by 2035, split between 3.5 per cent core defence and 1.5 per cent related investment.

The delivery machinery has been rebuilt to match. The Defence Investment Agency was announced in October 2025 to centralize and accelerate procurement. Canada's first Defence Industrial Strategy launched in February 2026.

The Buy Canadian Procurement Policy Framework took effect December 16, 2025, and the specifics matter more than the slogan. Federal defence and construction procurements valued at C$25 million or more that contain at least C$250,000 of steel, wood products or aluminum must use Canadian-produced material where Canadian supply exists. A companion policy applies a pricing preference favouring Canadian suppliers in strategic procurements. And amendments effective December 15, 2025 narrowed what the Canadian International Trade Tribunal can review, which effectively removes the route for challenging a procurement on Canadian-supplier or Canadian-content grounds. If you're a foreign-owned supplier to the Canadian government, that last point deserves a careful read.

And there's an export channel that gets almost no attention in Canadian boardrooms. Canada signed the final Canada-EU SAFE agreement at the Munich Security Conference in February 2026, becoming the first non-EU state to conclude a bilateral agreement under the SAFE Regulation. SAFE is a €150 billion loan instrument supporting European military acquisition. Canadian firms gained access to that market at precisely the moment U.S. market access became less reliable.

Read those three developments together. Buy Canadian is redirecting domestic spend toward Canadian suppliers. SAFE opens European demand. The trade conflict is making U.S. supply chains less attractive to Canadian buyers. For a Canadian defence or dual-use firm, that's the most favourable policy alignment in decades, and it's being allocated through processes that reward companies who engage early.

The three relief channels

Executives generally ask the same question at this point: what can we actually recover. There are three routes, and they operate on completely different logics.

Remission

Remission provides relief from tariffs or refunds of tariffs already paid. Finance confirmed on August 25 that the framework remains open for exceptional relief.

The government considers requests in two circumstances: where inputs cannot be sourced domestically, nationally or regionally, or reasonably from non-U.S. sources; and case by case, where other exceptional circumstances could severely harm the Canadian economy.

The bar is deliberately high. Finance's own framing is that remission is an exception to the rules, granted only where exceptional and compelling circumstances outweigh the rationale for the tariff in the first place.

The process is where most companies underestimate the work. A request goes to Finance, is assessed in consultation with other departments, and may be tested against domestic producers who are consulted on whether they could supply the good. A recommendation goes to the Minister of Finance, who has authority under section 115 of the Customs Tariff to recommend remission to the Governor in Council. An Order in Council is required for it to take effect.

Three implications follow.

First, this is an evidence exercise, not a lobbying exercise in the caricatured sense. A strong submission documents sourcing attempts, quantities, specifications, timelines, comparable products, market data and corroborating third-party support. Weak submissions assert hardship without proving unavailability.

Second, domestic producers get a say. If a Canadian supplier steps forward claiming they can meet your requirements, you'll be directed to them. Knowing who else can make your input before you file changes how you frame the request.

Third, timing is unpredictable. Finance has been unable to specify review timeframes given request volumes and procedural steps. Treat remission as a medium-term recovery mechanism, not a cash flow solution.

The C$7.5 billion package

These are the near-term liquidity instruments, and they're more specific than most summaries suggest.

The Regional Tariff Response Initiative gets an additional C$1.5 billion through the seven Regional Development Agencies, effective September 2026. The non-repayable contribution cap rises from C$1 million to C$3 million, and now covers demonstrated liquidity needs rather than only pivot or capital investment plans. Liquidity support runs up to C$2 million.

BDC gets a second C$500 million liquidity stream through Pivot to Grow, open to tariff-affected companies regardless of sector, with loans from C$250,000 to C$5 million and interest-only payments over 36 months. The application process is being simplified. Critically for mid-market firms, the minimum revenue threshold for BDC's tariff programs drops to C$1 million.

The Canada Strong Diversification Fund adds C$2 billion as a new stream of the Strategic Response Fund, aimed at shovel-ready projects supporting ongoing capital maintenance, with a fast-track one-step review.

Rapid Response Supports for Workers and Employers carries C$3.5 billion, including extended EI flexibilities and a new Workforce Retention and Retraining Program merging Work-Sharing and the Worker Retention Grant, with up to C$1,000 per participant for training and administrative costs.

The C$10 billion Large Enterprise Tariff Loan facility gains flexibility: liquidity support extends from 24 to 36 months of company needs, and maximum loan terms from 10 to 15 years.

Finance has signalled it will keep assessing programs and may expand existing measures to newly affected sectors. That last sentence is the one worth underlining. Program scope is still being written, and sectors that make a documented case for inclusion have a real chance of getting it.

Diversification and procurement

The third channel is demand substitution. Buy Canadian in federal procurement, the SAFE agreement for defence and dual-use exports, the Trade Commissioner Service for market diversification, and the major projects pipeline that Ottawa is explicitly tying to job placement through JobBank.

This is the slowest channel and the most durable one. Companies that treat the current disruption as a reason to restructure where they sell will be in a different position in three years than companies that spend those years filing remission requests.

What belongs on the executive agenda

Before September 8. Map your bill of materials against the counter-tariff list at the tariff line level. Confirm origin, classification and CUSMA eligibility together, since exposure depends on all three. Model landed cost at 15, 25 and 50 per cent for affected inputs. Identify which contracts have escalation clauses and which don't, then start the conversations on the ones that don't.

Within 30 days. Decide whether you have a remission case, and be rigorous about it. Evidence of failed domestic sourcing is the centre of the file. Assess eligibility against the C$7.5 billion programs, noting the lowered BDC revenue threshold, because a lot of mid-market firms that were previously ineligible now qualify. Brief your board on the Section 338 litigation risk in both directions.

Within 90 days. Decide your position on the policy questions your sector faces, and whether you intend to advocate for it. Program scope is unsettled. So is the shape of any resumed negotiation. Both are being decided now by people who will weigh the submissions in front of them.

Ongoing. Watch four indicators: signals on resuming negotiations, the CUSMA annual review cycle now that the 16-year extension was declined, pending Section 232 investigations covering medical technology and other categories, and any U.S. legal challenge to the Section 338 authority.

The judgment call underneath all of this

Every executive team facing this is really answering one question: is this a shock to absorb or a change to restructure around.

The evidence points away from a quick resolution. Negotiations collapsed rather than paused. The U.S. moved to a novel legal authority after losing on the previous one. CUSMA lost its long-term extension. Canada has now committed roughly C$32 billion in support to affected businesses and workers and is designing programs for a prolonged conflict.

Companies that treat this as weather will keep absorbing costs while waiting for conditions to change. Companies that treat it as climate will restructure sourcing, revisit market mix and engage on the policy decisions that are still open.

Which is right for your business depends on your exposure, your balance sheet and your time horizon. What isn't defensible is failing to make the call deliberately.

Where advocacy fits

Two things are being decided right now by government, and both are open to influence.

Program design is unfinished. Finance has said explicitly that it will assess expanding existing measures to newly affected sectors. Sectors that document their case get considered. Sectors that stay quiet get whatever the general design produces.

Negotiating priorities are unfinished. Both governments have kept the door open, and whenever talks resume, someone will decide which sectors get protected and which become trade-offs. Supply management is already named. Others will be. Those decisions get shaped by which industries made their case credibly, early, and with evidence.

What determines the outcome is arriving with a documented position at the moment the decision is live, and knowing which official actually holds the pen.

Selvam Public Affairs works across federal, provincial and municipal governments on exactly these files, with current registrations spanning energy, defence, taxation and finance, government procurement and economic development. If your organization is assessing remission, program eligibility or its position ahead of resumed negotiations, the useful first conversation is about your specific exposure and what's realistically winnable.

Request a government relations assessment with Selvam Public Affairs

This briefing reflects publicly available information as of August 26, 2026. Tariff measures are changing rapidly and the details here should be verified against current government sources before decisions are made. This is not legal, customs or tax advice.