USMCA and CUSMA Compliance – Without the Big-Firm Markup

USMCA and CUSMA are the same agreement; the U.S. calls it USMCA, Canada calls it CUSMA, Mexico calls it T-MEC. If your product moves between any two of these three countries, getting rules of origin right can eliminate duty entirely, and getting it wrong can turn into a CBP or CBSA assessment with penalties. We help small and mid-size importers do it right, and claim up to four years of back-refunds where it wasn’t done right before.

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Why USMCA/CUSMA matters more than most importers realize

USMCA/CUSMA is the most valuable tariff preference available to North American businesses. Done correctly, it zeroes out duties on qualifying goods. Done incorrectly, it creates audit exposure on both sides of the border.

Three things make it tricky:

The rules of origin are product-specific. Each HS code has its own origin rule: change in tariff classification, regional value content, or both. Getting the rule wrong is the most common mistake.
The certification of origin is not a form; it’s a data requirement. Any of the exporter, producer, or importer can prepare it, but it must contain nine specific data elements and be backed by records for 5 years (U.S.) or 6 years (Canada).
Refunds go back four years in Canada and one year in the U.S. (with exceptions). If you’ve been importing without claiming USMCA preference when you could have, there’s likely money on the table.

What actually qualifies

A good isn’t automatically USMCA/CUSMA-eligible just because it was made in North America. To qualify, a product has to meet one of the following rules, depending on its HS classification:

Wholly obtained. Grown, mined, fished, or harvested entirely in Canada, the U.S., or Mexico.
Produced exclusively from originating materials. Every input is already USMCA/CUSMA-originating.
Tariff shift. Non-originating inputs undergo a specified change in HS classification during production in North America.
Regional Value Content (RVC). Enough of the product’s value comes from the region. RVC is calculated using either the net cost method (typically 60%+) or the transaction value method (typically 65%+).
De Minimis. A limited tolerance for non-originating inputs that don’t meet the tariff shift rule (usually 10% by value).

Product-specific rules override the general rules. Automotive, textile, and agricultural goods have their own annexes.

The six-step USMCA/CUSMA workflow we use with clients

HS classification confirmation. The origin rule depends on the code. If the code is wrong, everything downstream is wrong.
Bill-of-materials origin analysis. Walk every input back to its source country. Non-originating inputs trigger the tariff-shift or RVC test.
Rule selection and documentation. Decide which origin rule applies and document why. This is the audit trail.
Regional Value Content calculation (where needed). Net cost or transaction value, modeled and documented.
Certification of origin preparation. Nine required data elements, signed by exporter, producer, or importer.
Record retention setup. 5-year retention in the U.S., 6-year retention in Canada. Records have to cover supplier affidavits, production records, and the calculations themselves.

Done once, this framework handles every shipment of the same product. Done wrong, each shipment compounds the exposure.

Claiming USMCA/CUSMA refunds retroactively

If preferential treatment wasn’t claimed at entry but the goods did qualify, both countries allow retroactive claims:

Canada (CBSA): File a B2 Adjustment Request within 4 years of accounting for the goods. This is one of the most generous refund windows available to any Canadian importer.
U.S. (CBP): File a post-importation claim under 19 USC 1520(d) within 1 year of importation, with the certification of origin in hand at the time of filing.

For Canadian SMEs in particular, the 4-year CUSMA refund window is often the single biggest recovery opportunity sitting on the balance sheet.

How we work

We engage with importers on three kinds of USMCA/CUSMA work:

Origin analysis and certification program setup. Once-off for a product line or SKU portfolio, with an ongoing maintenance plan.
Retroactive refund claims. B2s in Canada, 1520(d)s in the U.S., with documentation and rationale that will survive verification.
Audit defense. Representation and preparation when CBP or CBSA asks for substantiation of a claim already made.

No long-term contracts. Fees scoped to the work.

Frequently asked questions

What’s the difference between USMCA, CUSMA, and T-MEC?

They’re three names for the same agreement. The U.S. uses USMCA (United States-Mexico-Canada Agreement). Canada uses CUSMA (Canada-United States-Mexico Agreement). Mexico uses T-MEC (Tratado entre México, Estados Unidos y Canadá). The legal text is identical across all three; only the name differs.

Who can sign the USMCA certification of origin?

Any one of the exporter, the producer, or the importer can complete the certification. The choice is strategic: the importer can certify only if it has enough information about how the goods were produced, which usually means relying on exporter or producer data anyway.

How long do I have to claim a CUSMA refund in Canada?

CBSA allows importers up to four years from the date goods were accounted for to submit a B2 Adjustment Request claiming CUSMA preferential treatment retroactively. This is one of the longest refund windows in Canadian trade law.

How long do I have to claim a USMCA refund in the U.S.?

CBP allows a post-importation claim under 19 USC 1520(d) within one year of importation. The claim requires a certification of origin in hand at the time of filing; you cannot build the certification after the fact to support an old entry.

What records do I need to keep?

Importers, exporters, and producers must retain: the certification of origin, supplier affidavits, production records, bills of materials, and any regional value content calculations. Retention is 5 years in the U.S., 6 years in Canada.

What happens if CBP or CBSA denies my USMCA claim?

In the U.S., file a protest under 19 USC 1514 within 180 days of liquidation. In Canada, request a further review or appeal under the Customs Act. In both cases, the priority is preserving filing deadlines first and building the merits case second.

Do I need a customs broker or a trade consultant?

A customs broker handles the entry filings. A trade consultant builds the origin program: the classification logic, the certification process, the supplier documentation system, and the refund strategy. Most SMEs benefit from both, but the consulting work is what actually determines whether the preference is available.

What’s the biggest mistake importers make with USMCA/CUSMA?

Assuming the exporter’s certification of origin is enough. The importer of record bears the ultimate liability for the accuracy of the claim. If the exporter’s certification is wrong, CBP and CBSA come after the importer, not the exporter. Independent verification is cheap insurance.

Ready to claim what you’re owed?

If you import regularly between Canada, the U.S., or Mexico and you’re not claiming USMCA/CUSMA preference, or you’re claiming it without a documented origin analysis, there’s work to do.