US Section 338 tariff swap lands October 30 — Canadian exporters and cross-border supply chains in play

The swap

Effective October 30, 2026, the Trump administration is pulling Section 338 tariffs off some Canadian goods and slapping them onto others. Off the list: certain paper and plastic products, refrigeration and packaging equipment, agricultural machinery, seaweed and algae products. Newly covered: shampoos, cocoa powder products, window air-conditioning units, archery equipment, and some canoes.

This is US import policy, not Canadian, but it matters for Canadian importers in two ways. First, if you’re sourcing any of these categories from the US or managing inventory across the border, the tariff environment just shifted under your suppliers. Second, trade policy moves like this tend to trigger reciprocal noise. CBSA hasn’t announced anything, but the last time Section 338 tariffs moved, Canada responded with its own tariff adjustments on US goods within the quarter.

What Section 338 actually does

Section 338 of the Trade Expansion Act gives the US president authority to impose tariffs on specific goods from specific countries without the usual Congressional process. It’s narrower than Section 232 (national security) or Section 301 (unfair trade practices), and it’s been used as a negotiating lever. The Trump administration has been using it intermittently since 2025 to pressure trade partners on unrelated issues — midterm politics, border enforcement, agricultural market access.

The October 30 swap appears to be political manoeuvring ahead of the US midterms. Some of the goods coming off the tariff list (agricultural machinery, packaging equipment) are manufactured in swing districts. Some of the goods going on (window AC units, shampoos) are not.

For Canadian importers, the takeaway is not the specific product list — most of you are importing INTO Canada, not exporting these categories to the US. The takeaway is that tariff certainty is not a thing right now, and if you’re filing CADs under CUSMA origin claims or managing duty drawback programs that assume stable rates, you need to watch reciprocal risk.

Cross-border supply chain implications

If your Canadian operation sources packaging equipment or refrigeration units from a US supplier, and that supplier was pricing in a Section 338 tariff that just disappeared, your next quote might drop. Conversely, if you’re buying window AC units or canoes from the US and they just got added to the tariff list, your supplier’s landed cost into the US market just went up — and if they export to you from a US warehouse, that inventory positioning math changes.

The bigger issue is timing certainty. Cross-border shipments under CUSMA get duty-free treatment if they qualify, but qualification requires documented origin, and origin verification can take months if CBSA or US Customs decides to audit. If tariffs are moving every quarter, importers managing dual inventory (stock in Canada, stock in the US, cross-border fulfillment) lose the ability to lock in duty treatment for advance planning.

We’re seeing this on the brokerage side already. Importers who filed CUSMA preference claims in Q2 are getting verification requests in Q4, and by the time the verification closes, the tariff environment has moved. The claim might still be valid, but the financial planning assumption that justified the cross-border shipment is stale.

Canadian reciprocal watch list

Canada has not announced retaliatory measures yet, but the pattern from 2025 suggests a response within 60 to 90 days if the tariffs stay in place. The last time the US added Canadian goods to a Section 338 action, Canada responded with its own tariff adjustments on US-origin goods in the same HS chapters — not identical products, but close enough to send a signal.

If you’re importing any of the following categories from the US, you should plan for potential Canadian tariff noise in Q1 2027:

• HS 3305 (hair care preparations, including shampoos)
• HS 1806 (chocolate and cocoa preparations)
• HS 8415 (air conditioning equipment)
• HS 9506 (sporting goods, including archery equipment)
• HS 8903 (certain pleasure craft, including canoes)

CARM’s Statement of Account will show any new duties in the month they’re assessed, but by that point you’ve already filed the CAD and posted the RPP bond. If CBSA adds a tariff mid-month and you’re releasing prior to payment, your bond utilization spikes before you see the invoice. That’s the kind of thing that shows up as a cash flow surprise two weeks later when the Statement of Account posts and your RPP bond headroom is gone.

If you’re running tight on your financial security under CARM, and you’re importing any of these categories from the US at volume, now is the time to model a 10% or 25% tariff scenario and see whether your current bond sizing still works. We run that math regularly for clients managing duty and trade compliance programs — it’s not a complex model, but it requires knowing your monthly import volume by HS code and your current RPP bond limit.

CUSMA origin and the tariff swap

CUSMA origin claims are still the dominant duty mitigation tool for US-origin goods, and the tariff swap does not change the basic qualification rules. If a good qualifies for CUSMA preference, it enters Canada duty-free regardless of what the US does on its side.

The complication is when a good is assembled in the US from components that originate elsewhere. A window AC unit might have a compressor from China, a fan motor from Mexico, a control board from Taiwan, and final assembly in Ohio. If it qualifies as US-origin under CUSMA’s product-specific rules of origin, it enters Canada duty-free. If it does not qualify, it enters at the MFN rate for China-origin goods (or wherever the non-qualifying component came from), and you’re filing the CAD with a different tariff treatment than your supplier assumed.

The Section 338 swap does not change any of that classification or origin math, but it does mean your US supplier might be re-evaluating their own sourcing and assembly footprint. If the tariff on window AC units is now 10% or 25% on the US side, and your supplier was assembling in Ohio to serve both the US and Canadian markets, they might shift assembly to Mexico or Canada to avoid the tariff. That could change the origin profile of the goods you’re importing, which changes your CUSMA claim.

If you’re currently importing any of the newly covered categories from the US under a CUSMA preference claim, verify the origin documentation with your supplier in the next 60 days. If they’re changing their supply chain in response to the new US tariff, your origin profile changes, and your CAD filing changes with it.

Practical steps

If you’re importing from the US in any of the five HS chapters listed above, pull your last three months of CAD filings and check your current duty treatment. If you’re claiming CUSMA preference, confirm the origin documentation is current and that your supplier has not shifted sourcing or assembly in the last quarter. If you’re paying MFN duty, model what a 10% or 25% Canadian retaliatory tariff would do to your landed cost and your RPP bond utilization.

If you’re managing cross-border inventory (stock in Canada, stock in the US, fulfillment in both directions), review your transfer pricing and duty drawback assumptions. The tariff environment is moving faster than annual planning cycles, and assumptions that were safe in Q2 are not safe in Q4.

If you’re running close to your RPP bond limit, talk to your broker about resizing before the next Statement of Account posts. CARM’s monthly assessment cycle means you see the duty spike two to four weeks after the shipment clears, and by that point you’re already into next month’s release volume. We’ve seen importers hit their bond ceiling mid-month because a tariff change they did not plan for ate their headroom.

The Section 338 swap is a US policy move, but the cross-border and reciprocal implications are real for Canadian importers managing tight duty budgets and cross-border supply chains. This is not the last tariff adjustment we’ll see before year-end.

If your RPP bond math feels stale or you’re sitting on CUSMA claims that assume a supply chain your US supplier just changed, that’s a sizing conversation worth having this week. Get in touch.

Source: CSCB