New U.S. Section 338 Tariffs on Canadian Goods — What Cross-Border Shippers Need to Know

On July 20, 2026, the U.S. Executive Branch announced new Section 338 tariffs on Canadian goods. These new proclamations under Section 338 of the Tariff Act of 1930 each impose an additional 50% tariff on certain Canadian goods exported into the United States. The tariffs take effect 30 days after signing, approximately August 19, 2026.

If you're a Canadian business exporting goods into the United States, our job is to help you understand what this means for your cross-border operations and figure out what to do about it before the clock runs out.

What's Actually Happening

Three separate proclamations each cover a different category of Canadian goods. The US administration framed the measures around three sectors where it claims Canada applies differential treatment to American products: motor vehicles, alcoholic beverages, and dairy. The covered goods span a wider range than just those sectors. Wine, cement, and hockey sticks are among the examples cited in the fact sheet.

The carve-outs matter too. The following are explicitly excluded from these Section 338 tariffs:

Energy products
Potash
Goods already subject to Section 232 tariffs, which includes steel, aluminum, copper, trucks, automobiles, timber, lumber, and pharmaceuticals
Fish and certain critical minerals

If your products fall cleanly into an excluded category, these proclamations may not change your cross-border cost structure directly. But if your products are anywhere near the covered categories, or if you're not entirely sure, that's worth clarifying before August 19.

The Detail That Changes the Calculation for Many Shippers

Here's the part that's creating the most questions in conversations we're already having with clients:

These tariffs apply regardless of CUSMA/USMCA preferential status.

That's a significant departure from how many Canadian exporters have been managing their tariff exposure. CUSMA qualification has been a meaningful tool. Proper origin documentation, regional value content compliance, and certificate of origin management have all been part of how shippers legitimately reduced duty costs on cross-border freight.

For covered goods under these Section 338 proclamations, that tool doesn't apply. The additional 50% duty stacks regardless of whether a good qualifies under CUSMA.

That doesn't mean there's nothing to be done. It means the analysis needs to start from a different place: classification accuracy, valuation, which specific proclamation applies or doesn't to a given product, and whether there are other legitimate pathways worth examining. That's exactly the kind of work we do.

What Canadian Exporters Should Be Asking Right Now

If you're moving goods from Canada into the US, these are the practical questions worth working through before August 19:

Which proclamation, if any, covers my product? Three separate proclamations cover different product sets. Knowing which one applies, or whether your product falls outside coverage entirely, is the starting point for everything else.

Is my tariff classification current and accurate? Classification matters in every tariff environment. In this one, it matters more. A product description or HS code that hasn't been reviewed recently could be placing goods in a covered category unnecessarily, or missing an exclusion that applies.

What does my landed cost actually look like now? A 50% additional duty on a covered product is a real number that affects pricing, margins, and competitiveness in the US market. Shippers need an honest picture of that before the next shipment moves, not after.

Are there legitimate pathways I haven't explored? We don't look for loopholes. But we do look hard at proper classification, substantial transformation analysis, valuation reviews, and every other legitimate tool available, because that's what being knowledgeable about these rules actually means in practice. Sometimes there's a legitimate approach that hasn't been considered yet. We'd rather find that before the tariff hits than after.

What We're Doing From Our End

We've been monitoring these proclamations since they were announced and we're already in conversations with clients about what this means for their specific product lines and cross-border flows.

The honest reality of the current trade environment, and we've said this to clients directly, is that the rules are moving faster than anyone can fully anticipate. What we can offer is current knowledge, honest analysis, and the willingness to dig into the details for each client rather than give the same generic answer to everyone.

That's been our approach through every tariff development in the last few years. Steel surtaxes, Section 232 measures, CUSMA implementation, de minimis changes. We stay current so our clients don't have to track all of this themselves.

These Section 338 proclamations are the newest chapter in a trade environment that hasn't stopped moving. We'd rather help you navigate it before August 19 than help you untangle the consequences after.

A Note on What's Still Developing

Implementation details, including how CBSA and CBP apply these proclamations at the border in practice, and whether any further guidance or modifications follow, are still developing as of this writing. We'll update this post as more clarity emerges.

What's confirmed: the effective date is approximately August 19, 2026. The additional duty rate is 50% on covered goods. CUSMA preferential status does not exempt covered goods from these tariffs.

If you export Canadian goods into the US and you want to understand how this affects your shipments, reach out now. We're a Toronto-based team, we're working through this in real time alongside our clients, and we'll give you a straight answer on what we know and what's still unclear.

That's the most useful thing we can offer right now.