Importing from the United States or Canada can mean paying 0% duty — or not — and the difference comes down to a single document: the USMCA (T-MEC) certificate of origin. But that benefit isn’t automatic just because you bought from a U.S. supplier. The goods have to qualify as originating under the treaty’s rules of origin, and the certification has to be done right. A “Made in USA” product isn’t enough. Here’s how preferential treatment works, what triggers it, and the mistakes that knock it down.
What the certificate of origin is and what it’s for
It’s the document that proves goods are originating in the USMCA region (Mexico, United States, Canada) and therefore qualify for preferential tariff treatment — usually 0% duty. Without a valid certification, those same goods pay the most-favored-nation (MFN) duty, which can range from a few points to double digits depending on the tariff code.
In other words: the certificate of origin is the key that unlocks the preferential duty. No key, you pay the general rate.
Origin is not the same as where it ships from
This is the most expensive misunderstanding. Where it’s shipped from is not the same as where it’s considered originating. A supplier in Texas can sell you a product assembled there with inputs from third countries (components from Asia, say). The shipment leaving Laredo doesn’t make it “USMCA originating.” What decides origin are the treaty’s rules of origin applied to that specific product.
Rules of origin: how goods “qualify”
USMCA defines, product by product, what’s needed for goods to be originating. The main criteria:
| Criterion | What it means |
|---|---|
| Wholly obtained | Produced entirely in the region (crops, minerals, etc.) |
| Change in tariff classification | Non-originating inputs “shift” tariff codes when transformed — a tariff shift |
| Regional value content (RVC) | A minimum percentage of value must be regional (transaction-value or net-cost method) |
| Product-specific rules | Each code has its rule in the treaty’s rules-of-origin annex |
There’s also the de minimis rule: if the value of non-originating inputs that don’t meet the tariff shift is below a certain threshold (generally 10% of the value of the goods), it can still qualify. And some sectors — automotive is the emblematic case — have tougher rules: higher RVC percentages and labor value content requirements.
The practical takeaway: whether you qualify depends on your product’s tariff code and the real composition of its inputs. It’s not an opinion; it’s a technical analysis.
How origin is certified under USMCA
Unlike the old NAFTA, USMCA doesn’t require a pre-printed official form. Origin is proven through a certification that can sit on any document (even the invoice) as long as it contains the minimum data elements the treaty requires (Annex 5-A), including:
- Who certifies (exporter, producer or importer) and their details.
- Exporter, producer and importer information.
- Description and tariff classification (to the 6-digit Harmonized System level) of the goods.
- The applicable origin criterion.
- The period covered (one shipment or a blanket period of up to 12 months).
- Signature and date.
A key USMCA point: the certification can be issued by the exporter, producer or importer. If you do it as the importer to claim the preference, you take on responsibility that the goods actually qualify — and for having the backing if you’re audited.
What happens if the certification is wrong — or doesn’t qualify
| Situation | Consequence |
|---|---|
| Claiming preference without a valid certification | Treatment denied; you pay MFN duty + differences |
| Goods that don’t actually qualify | Tax assessment for omitted contributions, surcharges and fines |
| Certification with incomplete or wrong data | Preferential treatment rejected; authority query |
| Origin verification (audit) with no backing | Retroactive denial of the benefit across all operations in the period |
The authority can launch an origin verification and look backward. If it concludes the goods didn’t qualify, it doesn’t just deny the preference on the single shipment: it denies it on all operations in the period, with the accumulated differences. That’s why the certificate of origin isn’t paperwork: it’s a technical declaration you must be able to defend with the producer’s documentation.
The most common SME mistake
Assuming that “since I buy it in the U.S., it comes in at 0%” and asking the supplier to “just put the certificate” without checking whether the goods actually meet their code’s rule of origin. If the product was assembled in the U.S. with Asian components that don’t achieve the tariff shift or the minimum RVC, it’s not originating — and the certification, though signed, is false as to origin. When the verification comes, the Mexican importer is the one who pays the differences. Requesting the certificate isn’t the same as being entitled to it.
How it fits with the rest of the clearance
Origin isn’t analyzed in a vacuum:
- It starts with the tariff classification, because the rule of origin and the MFN duty you’d compare against both depend on it.
- It’s reflected in the customs value, because RVC is calculated on values and the benefit is measured against the duty you’d pay without preference.
- And it materializes in the customs clearance, where the preferential treatment is claimed on the entry.
At TradeWay
USMCA preferential treatment is one of the biggest — and most poorly captured — savings in foreign trade. Because we handle the full operation — forwarding, clearance and consulting under a single point of contact — we can:
- Analyze whether your goods truly qualify as originating under their code’s rule, before assuming 0%.
- Validate the certification of origin so it has the minimum elements and withstands a verification.
- Quantify the real saving of preferential treatment versus the MFN duty, so you know how much is at stake.
If you import from the United States or Canada and aren’t sure your product qualifies, get in touch today and we’ll review it before your next shipment.
