Prime Minister Carney confirmed it on August 25: Canada's retaliatory tariffs on U.S.-origin goods take effect September 8, 2026. You have 14 days. If you're importing anything from the United States, that's not enough time to be casual about this.
Trade talks collapsed. Trump's 50% tariffs on Canadian exports are staying, and now they're hitting CUSMA-compliant goods too, which is a line most people didn't think he'd cross. Canada's response is proportional and it's coming fast. The question isn't whether this affects your supply chain. It almost certainly does. The question is whether you're ready to declare correctly on day one, or whether you're going to spend October explaining a compliance error to CBSA.
This post walks you through what's changing, what remission relief still exists, how to audit your affected tariff codes before September 8, and how to make sure your CARM declarations don't blow up in your face when the new rates kick in.
What Carney Actually Announced
On August 25, 2026, Prime Minister Mark Carney confirmed that Canada will impose retaliatory surtaxes on U.S.-origin goods starting September 8, 2026. This follows the breakdown of bilateral trade negotiations and Trump's decision to extend his 50% tariff regime to include CUSMA-compliant Canadian goods, which had previously been partially shielded.
The retaliatory measures build on the surtax framework Canada has been running since early 2025. If you've been tracking the Canada Gazette, Part II, Volume 160, you've seen the regulatory amendments coming. If you haven't been tracking it, now is the time to start.
What makes September 8 different from earlier rounds is scope. Previous retaliatory measures were targeted: steel, aluminum, specific consumer goods. This round is broader. More HS chapters are in play. And because it's moving fast, the administrative guidance from CBSA is still catching up to the political announcement.
McCarthy Tétrault flagged this clearly in their recent guidance: CBSA's interpretive framework is actively trying to narrow who qualifies for relief, not expand it. Don't assume your goods are covered by remission just because a colleague's similar goods were last spring.
The Remission Orders: What Relief Still Exists and What Expired
Here's where importers get into trouble. They hear "remission order" and assume it's a blanket exemption. It's not. It's a specific, time-limited, condition-based relief mechanism. And the conditions matter enormously.
EY reported that CBSA extended surtax remission for two additional months. PwC's Tax Insights confirmed Finance Canada extended relief from Canadian surtax for various U.S.-origin goods imported into Canada. That extension runs to November 30, 2026, according to the CBSA newsroom update.
So some relief is still on the table. But "some" is doing a lot of work in that sentence.
The remission orders are goods-specific and condition-specific. To qualify, your goods generally need to meet criteria like:
- The goods are U.S.-origin under CUSMA rules of origin
- You can demonstrate the goods were contracted or ordered before a specific cutoff date
- The goods fall within the specific HS codes listed in the remission order, not just adjacent codes
- You've maintained the documentation to support the claim at time of importation
McCarthy Tétrault's guidance is worth reading carefully here. CBSA has been issuing interpretive positions that narrow the scope of who qualifies. If your goods are borderline, don't assume you're in. Get a written opinion or an advance ruling before September 8 if you can.
A manufacturer we work with imports U.S.-made industrial components. They assumed their goods qualified for remission because a similar product their competitor imports did. Different HS code. Different condition. No remission. They ate the surtax and then had to go back and amend declarations. That's expensive and it's avoidable.
Check the specific remission order text in the Canada Gazette, Part II, Volume 160. Match your HS codes exactly. Don't interpret generously on your own behalf.
Auditing Your Supply Chain Before September 8
You have two weeks. Here's how to use them.
Step 1: Pull Your U.S.-Origin Import History
Go into your CARM client portal and pull every commercial import from the United States in the last 12 months. Sort by tariff treatment code. You're looking for anything declared under tariff treatment code 10 (MFN), 11 (CUSMA), or any treatment that indicates U.S. origin.
Don't rely on your memory or your supplier's word. Pull the actual CADs. You need the HS codes, the declared values, and the tariff treatment codes on paper in front of you.
Step 2: Cross-Reference Against the Affected HS Codes
The retaliatory surtax measures are HS-code-specific. Finance Canada publishes the schedule of affected goods. As of August 25, 2026, the full schedule for the September 8 measures is being finalized, but it builds on the existing surtax lists from earlier 2025 and 2026 rounds.
For each HS code in your import history, you need to know: is this on the list? If yes, what's the new surtax rate? Does a remission order apply?
This is not a ten-minute job. For a mid-size importer with 40 to 60 active product lines from the U.S., expect this to take a full day with your broker. Do it now, not September 7.
Step 3: Verify Your Origin Documentation
Origin is going to be scrutinized heavily. CBSA knows importers will try to re-route goods or claim non-U.S. origin to avoid the surtax. They've seen it before and they'll be watching for it.
If your goods are genuinely not U.S.-origin, make sure your CUSMA certificates or origin declarations are current, accurate, and on file. If your goods are U.S.-origin and you're claiming remission, make sure your documentation supports every condition of the remission order.
Claiming a tariff treatment you can't support is not a paperwork error. It's a misrepresentation. Under the Customs Act provisions CBSA outlines in D11-6-6, that can trigger penalties starting at $1,000 per occurrence under the Administrative Monetary Penalty System, and it escalates fast if there's a pattern.
Step 4: Talk to Your Suppliers Today
Some U.S. suppliers will try to absorb the surtax. Some will pass it through. Some will offer to ship from a third country. You need to know which scenario you're in before September 8, because it affects your declared value, your tariff treatment, and your landed cost calculations.
If a supplier offers to re-invoice through a Mexican or Canadian intermediary to avoid the surtax, be very careful. CBSA's transaction value rules under D-Memorandum D13-4-5 require you to declare the price actually paid or payable. Artificial re-routing that doesn't reflect a genuine change in origin or ownership is the kind of thing that ends with a CBSA audit and a very uncomfortable conversation.
CARM Declarations Under the New Surtax: What to Get Right
This is where the compliance rubber meets the road. The surtax is collected at the border through the normal CAD process, but the way you code the declaration matters.
Tariff Treatment Codes
If your goods are U.S.-origin and subject to the surtax, you'll need to declare them under the appropriate tariff treatment and then apply the surtax as an additional duty. Your broker should be on top of this, but you should understand what's happening on your own declarations.
Goods eligible for remission still need to be declared correctly. The remission is claimed through a specific mechanism, not by simply leaving the surtax line blank. If your broker isn't clear on the exact coding for remission claims under the September 8 measures, that's a conversation you need to have before the first shipment arrives.
For a deeper look at how CARM handles tariff treatment declarations and financial security requirements, the CARM readiness resources on this site walk through the current portal workflows.
Value for Duty
The surtax is applied to the value for duty. If your U.S. supplier has increased their prices in response to the trade situation, your value for duty goes up, which means your surtax goes up. Make sure your declared values reflect what you're actually paying. Don't try to split invoices or undervalue goods to reduce the surtax base. CBSA's valuation team has seen every version of that approach.
Financial Security in CARM
Here's something importers don't always think about until it's too late. Your financial security in CARM, whether that's a surety bond or cash deposit, needs to cover your duty liability. If the surtax significantly increases your total duty exposure on U.S.-origin goods, your existing security amount might not be adequate.
CBSA can put a hold on your release privileges if your security is insufficient relative to your import activity. With surtax rates potentially adding 25% or more on top of existing duties, importers who were running close to their security limits need to review that now.
Log into your CARM client portal, check your current security amount, and estimate what your monthly duty liability looks like with the new surtax applied. If the numbers are close, contact your surety provider or your broker this week.
What Happens If You Get It Wrong on Day One
Honestly, CBSA tends to be somewhat pragmatic in the first few weeks of a major tariff change. They know the guidance is still evolving. But "somewhat pragmatic" is not the same as "won't penalize you."
Under AMPS, a coding error on tariff treatment that results in underpayment of duties is a C016 violation. First occurrence for a large importer: $4,400. If it's a pattern across multiple entries, that number multiplies. And if CBSA determines the misrepresentation was intentional, you're in a different category entirely.
More practically, if you declare the wrong tariff treatment and underpay the surtax, CBSA will issue a detailed adjustment statement. You'll owe the surtax plus interest. The interest rate on customs debt is currently calculated at the prescribed rate under the Customs Act. It's not catastrophic per entry, but across a high-volume import program, it adds up quickly.
The smarter move is to flag uncertainty upfront. If you're not sure whether a remission order applies to a specific shipment, talk to your broker before it arrives. You can also request an advance ruling through CBSA, though with 14 days until implementation, the timeline is tight. Still worth asking.
For guidance on how advance rulings work and when they make sense, the advance rulings section covers the process and typical timelines.
Industries Most Exposed Before September 8
Not every importer is equally at risk. Some sectors have much higher U.S.-origin exposure and are going to feel this immediately.
Food and Beverage
A lot of food manufacturing inputs come from the U.S. Packaging materials, ingredients, processing equipment. Many of these were already subject to earlier rounds of surtax. September 8 may expand the list or increase rates on goods that had partial relief.
Manufacturing and Industrial
Machine parts, tooling, raw materials. If your production line depends on U.S.-origin components and you don't have an alternative supplier, you're absorbing this cost. The question is whether you can pass it through or whether it compresses your margin.
Consumer Goods and Retail
Retailers who source U.S.-branded goods or have U.S.-origin private label products need to look at their pricing models now. The landed cost calculation changes on September 8. Your retail price may need to change too, and that takes time to implement.
Agriculture and Agri-Food
Some agricultural inputs have been partially protected by remission orders. With the November 30 extension confirmed, there's some runway. But you need to verify your specific goods are covered and document it properly.
Practical Checklist: What to Do Before September 8
- Pull all U.S.-origin import records from the last 12 months from your CARM client portal.
- List every HS code you're importing from the U.S. and cross-reference against the Finance Canada surtax schedule for September 8.
- For each affected HS code, determine whether a remission order applies and whether your goods meet every condition.
- Verify your origin documentation is current and on file for all goods where you're claiming CUSMA treatment or non-U.S. origin.
- Call your U.S. suppliers and confirm their pricing, shipping arrangements, and any changes they're making in response to the tariffs.
- Review your CARM financial security amount and compare it to your projected duty liability with surtax applied.
- Brief your customs broker on every affected product line so they can code declarations correctly from day one.
- If you have borderline remission cases, request an advance ruling or get a written broker opinion before the first shipment.
- Set up an internal process to flag any new U.S.-origin purchase orders so they go through a surtax impact review before you commit.
Frequently Asked Questions
My goods are CUSMA-compliant. Does that mean I'm exempt from the surtax?
No. This is the part that caught a lot of importers off guard. Trump's 50% tariffs are now hitting CUSMA-compliant Canadian goods, and Canada's retaliatory measures apply to U.S.-origin goods regardless of CUSMA status. CUSMA preferential tariff treatment and the surtax are separate things. You can still claim CUSMA rates on the base tariff and still owe the surtax on top of that. They're not mutually exclusive.
I heard there's a remission order that covers my goods until November 30. Do I still need to do anything?
Yes. The remission doesn't apply automatically. You need to declare correctly at time of importation and your documentation needs to support the remission claim. If CBSA audits the entry and your paperwork doesn't hold up, you'll owe the surtax retroactively plus interest. Confirm with your broker exactly how the remission is claimed on the CAD and make sure your supplier documentation matches the conditions in the order.
What if my goods are in transit from the U.S. on September 8? Which rate applies?
Generally, the rate in effect at the time of accounting, meaning when the goods are released and the CAD is filed, is what applies. Goods that are physically in transit on September 8 but don't clear customs until after that date will typically be subject to the new surtax. There are sometimes transitional provisions for goods that were shipped before a specific date, but you need to check the specific regulatory text for the September 8 measures. Don't assume in-transit goods are grandfathered without confirming it.
My U.S. supplier is offering to re-invoice through their Canadian subsidiary to avoid the surtax. Is that okay?
It depends entirely on whether there's a genuine commercial transaction with the Canadian entity. If the Canadian subsidiary actually takes title, bears risk, and the goods are legitimately imported by that entity, that's a different supply chain arrangement. If it's just a paper exercise to change the invoice and the goods are still effectively U.S.-origin coming straight from the U.S. facility, that's the kind of arrangement CBSA will unwind in an audit. The value for duty rules require you to declare the price actually paid or payable in the underlying transaction. Get legal advice before you restructure anything.
How do I know if my CARM financial security is enough?
Log into the CARM client portal and check your current approved security amount. Then take your average monthly duty payments from the last three months and add the projected surtax on your U.S.-origin goods. CBSA generally wants your security to cover at least one month of duty liability, though the actual requirement depends on your import profile and release privileges. If the surtax pushes your projected monthly liability above your current security amount, contact your surety bond provider or your broker immediately. Running short on security can result in CBSA requiring payment before release, which kills your cash flow.
Can I apply for an advance ruling before September 8 to confirm my tariff treatment?
You can apply, but with 14 days left, you're unlikely to get a ruling back in time. CBSA's standard processing time for advance rulings is typically 30 days. That said, it's still worth submitting one for ongoing clarity, and in the meantime, get a written opinion from your customs broker. A broker opinion isn't binding on CBSA the way a ruling is, but it demonstrates due diligence if a question comes up later. It also helps you make a business decision now rather than waiting for certainty that may not arrive before your next shipment.