Nine days ago we wrote about the USMCA review opening as a slow, six-year-mandated process. Washington did not wait for it. On July 20, 2026, the White House announced new 50% tariffs on a slate of Canadian goods — including dairy, alcohol, and motor vehicles — under Section 338 of the Trade Act, effective August 19. Four days later, on July 24, the 10% Section 122 global surcharge that took effect in February expired on its statutory 150-day clock and was immediately replaced by new Section 301 tariffs of 10-12.5% on goods from 60 countries, Canada included, covering an estimated 99.4% of all US imports.
This is not the treaty review working itself out over years. It is unilateral executive tariff action running on its own clock, in parallel with the review — and for anyone moving freight across this border, the two tracks now have to be watched separately.
What is actually new, and what is not
It is easy to lose the tariff stack under a pile of section numbers. Here is where things stand as of this week:
- Section 232 (steel and aluminum): 25%, unchanged. Not new, not part of this week’s news, still in force.
- Existing softwood lumber and dairy levies: unchanged, and now sit alongside the new goods-specific tariffs below rather than being replaced by them.
- NEW — Section 338, 50% tariffs on select Canadian goods, effective August 19. The named categories so far are dairy, alcohol, and motor vehicles, plus a broader “other goods” bucket that a customs broker needs to review line by line — it is the least defined part of the announcement and the one most likely to catch a shipper off guard.
- NEW — Section 301, 10-12.5% tariffs on 60 countries including Canada, in force since July 24. This is not really new spending for most Canadian shippers — it replaced the Section 122 surcharge the same goods were already paying, so the near-term cash impact is closer to a rate adjustment than a fresh cost.
The headline number — 50% — belongs only to the Section 338 list and only after August 19. Do not let it get generalized in your planning to freight that is not on that list.
Carney says these tariffs breach USMCA. That is not settled.
Prime Minister Mark Carney has said publicly that the new auto tariffs violate USMCA outright — a live legal and political dispute layered directly on top of the review process, not a side issue from it. That claim has not been tested or resolved, and it will not be resolved before August 19. Plan around the tariffs as announced, not around the outcome of a dispute that has not started.
It is also worth noticing what has not happened yet: there have been no formal bilateral negotiating rounds between the US and Canada on any of this. The US and Mexico, by contrast, have already held three formal rounds, with a fourth scheduled for September. If your mental model of “the USMCA talks” has all three countries moving in lockstep, that model is wrong this week — Mexico is negotiating on a defined track, and Canada currently is not.
The freight data says something more specific than “volumes are down”
It would be easy to write “cross-border freight is soft” and move on. The real pattern is sharper than that, and it matters for how you read your own numbers. Cross-border freight overall has grown year over year for most months since last October. But per Landline Media’s reporting, that growth has been carried by Mexico — particularly computer and electronics exports — while Canadian-origin freight volumes have declined in most months from February 2025 through May 2026.
In other words: this is not a border-wide slowdown. It is a shift in where growth is happening, and Canadian lanes are on the losing side of that shift. If your volumes are down and you are assuming it is a broad freight recession, check that assumption — it may be specific to Canada, which changes what you should do about it.
Industry sentiment matches that read. Craig Watson, VP at Uber Freight Canada, described the mood as “on alert” but not panicked — carriers are treating the August 19 date as a 30-day negotiating window rather than a locked-in cost, since a deal or a carve-out in the next three weeks is entirely plausible.
What to actually do before August 19
- Get your SKU list against the Section 338 categories now, not in mid-August. Dairy, alcohol, and motor vehicles are named; if you ship anything adjacent, get your broker’s read on the “other goods” bucket before it becomes a surprise on a landed-cost report.
- Do not assume USMCA-compliant goods are automatically exempt from Section 338 the way they were carved out of the earlier Section 122 surcharge. That exemption pattern held for the last tariff round; it has not been confirmed for this one. Verify it with your broker rather than carrying the old assumption forward.
- Re-check your certificates of origin. Every prior tariff round in 2026 has increased scrutiny on USMCA origin claims, and this one will be no different — see our notes on shoring up origin documentation if that paperwork has gone stale.
- Make sure your CARM registration and security are current — see our CARM breakdown — because more classification scrutiny at the border means less tolerance for an importer who is not properly set up on the Canadian side.
- Talk to your carrier about capacity, not just cost. With growth concentrating in Mexican lanes, Canadian-lane capacity is being priced and allocated differently than it was a year ago. A carrier that tells you this and adjusts is worth more right now than one quoting last year’s rate card.
How Alpha Trans is holding the line
Tariff swings do not change what we control: CT-PAT, FAST, PIP, SmartWay, HAZMAT, and CSA certifications, dual bonding, and 200 company tractors running Windsor-Detroit (including the new Gordie Howe crossing), Fort Erie-Buffalo, and Sarnia-Port Huron. Our compliance team tracks section numbers and effective dates for a living so your shipment does not become the one that finds out about a new tariff at the booth.
August 19 is three weeks away. Get your exposure mapped now — talk to our cross-border team before the rate changes, not after.