U.S. Section 301 tariff proposal on Brazil goods: Canadian importers with triangular supply chains should check CUSMA origin now

Key Takeaways

• If you import finished goods assembled in the U.S. using Brazilian inputs, your CUSMA claim may collapse the day the U.S. exporter loses regional value content.
• CBSA verifies CUSMA origin by tracing inputs back through the supply chain; a tariff change in one country can invalidate your preferred-rate claim in Canada.
• File your CAD at MFN duty rates if you cannot confirm whether the U.S. exporter still qualifies for CUSMA after absorbing Brazilian input tariffs or substituting suppliers.
• Triangular supply chains with Brazil-origin steel, textiles, or electronics should audit their origin trail before CBSA does it for them under a formal verification.

U.S. tariff changes upstream can break CUSMA claims downstream

USTR published a Federal Register notice proposing a 25% tariff on imports from Brazil under Section 301 authority, with a July 6 public hearing. The tariff itself applies only to goods entering the United States. Canadian importers who bring Brazilian goods directly into Canada will not see a tariff change on their CAD.

But many Canadian importers do not source finished goods directly from Brazil. They buy from U.S. manufacturers who use Brazilian inputs: steel coil, textiles, electronics sub-assemblies. Those U.S. goods enter Canada under CUSMA origin claims at zero or reduced duty. The day the U.S. supplier absorbs a 25% input tariff or substitutes a non-NAFTA supplier to avoid it, the regional value content calculation can flip. Your CUSMA origin claim collapses, and CBSA origin verification will catch it eventually.

This is not speculative risk. CBSA traces inputs back through the supply chain when it verifies CUSMA origin under Article 5.9. If the U.S. exporter no longer qualifies because Brazilian content exceeded the de minimis threshold or the tariff classification jump no longer works, your CAD carries a false origin declaration. CBSA re-assesses at MFN rates, demands retroactive duty, and piles on interest dating back to the original release.

Triangular supply chains and CUSMA origin math

CUSMA Article 4.2 defines originating goods using three tests: wholly obtained, tariff shift plus regional value content (RVC), or tariff shift alone. Most manufactured goods rely on RVC, which means you must prove that a minimum percentage of the good’s value comes from CUSMA territory (62.5% under the net-cost method for most products, 75% under transaction-value for some).

Brazilian inputs count as non-originating materials. When a U.S. manufacturer uses Brazilian steel to make an automotive part and the steel represents 20% of the net cost, that 20% sits outside the CUSMA calculation. Add a 25% tariff to that steel, and the U.S. manufacturer will either absorb the cost and shrink margin or substitute Chinese, Mexican, or U.S.-origin steel to preserve CUSMA qualification.

If they absorb the cost and do nothing, the part still qualifies. If they substitute and the new supplier is not CUSMA-originating, the RVC calculation may still work. But if they switch to a non-originating input and do not recalculate, the part loses CUSMA origin. Your Commercial Accounting Declaration at the Canadian border claimed a CUSMA rate based on the old certificate. CBSA verification will ask for production records, supplier declarations, and purchase invoices. The numbers will not match.

What CBSA verification looks like when origin falls apart

CBSA can verify origin within five years of import under CUSMA Article 5.9. The written request for information goes to the importer on record. You have 30 days to provide a signed certificate of origin, supplier declarations tracing all non-originating materials, and production records proving the tariff shift and RVC calculation.

If the U.S. exporter substituted suppliers after your shipment cleared and cannot reconstruct the input trail, you will not have the documents. CBSA denies the CUSMA claim, re-assesses the entry at MFN rates under Customs Act section 59, and issues a Notice of Re-determination. You owe the duty difference plus interest at the Bank of Canada average rate plus six percentage points, compounded monthly from the date of original release per Customs Act section 33.6.

If you claimed the preference on a dozen entries over two years, the re-assessment bill can exceed the value of the compliance staff time you saved by not auditing the supply chain.

File at MFN if you cannot confirm origin

You are not required to claim CUSMA origin on every eligible good. If your U.S. supplier cannot confirm whether Brazilian input tariffs will force a supplier change, file your CAD at MFN duty rates. Pay the higher duty at time of entry, obtain release, and revisit the origin question later.

You have four years from the date of accounting to file a CARM Portal adjustment request under Customs Act section 74 if you later obtain clean origin documentation. The refund takes six to eight weeks once CBSA accepts the claim. This sequence is slower and ties up working capital, but it is safer than filing a CUSMA claim you cannot defend.

If you are posting an RPP bond for release prior to payment, the MFN duty amount will draw more security. A typical mid-market importer posts a bond equal to the highest monthly K84 statement over the prior twelve months. Switching from zero-duty CUSMA claims to 6.5% MFN claims (the rate for many HS 8471 electronics, for example) can push your bond minimum from CAD 50,000 to CAD 80,000. Run that math before you decide.

Audit your CUSMA origin trail now

If you import finished goods from the U.S. and those goods contain Brazilian inputs in steel (HS 72), textiles (HS 50-63), or electronics (HS 85), ask your U.S. exporter three questions:

• Do you source any inputs from Brazil today?
• If the U.S. imposes a 25% tariff on those inputs, will you substitute suppliers or absorb the cost?
• If you substitute, will the replacement supplier be CUSMA-originating?

If the answer to the third question is uncertain, request an updated CUSMA certificate before your next shipment. Do not assume the old certificate still works. CBSA does not grandfather origin claims when upstream supply chains change.

A proactive compliance audit catches invalid claims before CBSA does. If you discover that past entries carried false origin declarations, you can file a Voluntary Disclosure under CBSA’s VDP program and avoid AMPS penalties. The penalty floor for an incorrect origin declaration is CAD 400 per contravention under the Master Penalty Document. Multiply that by the number of entries over the past five years if CBSA finds it first.

We also see this issue land on the warehouse floor at FENGYE: goods arrive under CUSMA claims, CBSA flags the entry for origin verification, and the importer cannot produce the supplier declarations. The shipment sits in sufferance until the documentation arrives or the importer agrees to pay MFN duty. Either way, dwell time climbs and the inbound schedule falls apart.

One tariff change, five borders later

The proposed Section 301 tariff on Brazil is a U.S. policy decision. Canadian importers who buy directly from Brazil will not see a duty change at the Canadian border. But importers who source U.S.-made goods with Brazilian inputs need to treat this as a CUSMA origin audit trigger. CBSA will verify the claim eventually. If the U.S. exporter substituted inputs and did not recalculate RVC, your CAD carries a false declaration.

File at MFN if you cannot confirm the origin trail. Audit your supply chain now if you rely on CUSMA preferences for goods with Brazilian content. The refund process under Customs Act section 74 exists for a reason, and it is cheaper than a CBSA re-assessment with five years of compounded interest.

If your last dozen CAD filings claimed CUSMA origin and you do not have supplier declarations tracing every input back to originating territory, that is the file we pull first when audit season arrives. Get in touch.

Frequently Asked Questions

What is a Section 301 tariff and why does it matter to Canadian importers?

Section 301 is a U.S. trade-law mechanism that imposes unilateral tariffs on goods from specific countries. When the U.S. raises tariffs on Brazilian inputs, U.S. manufacturers may substitute suppliers or absorb higher costs, which can change the regional value content (RVC) calculation required under CUSMA Article 4.2 and invalidate your Canadian CUSMA origin claim.

How does CBSA verify CUSMA origin on a Commercial Accounting Declaration?

CBSA can issue a written request for origin documentation under CUSMA Article 5.9 within five years of import. You must provide a signed certificate of origin, production records, and supplier declarations proving the good qualifies under the product-specific rule of origin in Annex 4-B. Failure to respond within 30 days can result in denial of preferential treatment and retroactive duty assessment.

If my U.S. supplier switches from Brazilian steel to Mexican steel, do I need to refile my CAD?

No. Your original CAD reflects the origin claim at time of import. If the supplier changes inputs after your shipment cleared, that affects future shipments only. You should ask the U.S. exporter for an updated CUSMA certificate before your next CAD filing to avoid claiming a preference you no longer qualify for.

What happens if CBSA denies my CUSMA claim after verification?

CBSA will re-assess the entry at MFN duty rates under Customs Act section 59, issue a Notice of Re-determination (Form B2), and demand payment within 30 days. Interest accrues from the original release date at the Bank of Canada average rate plus 6 percentage points per Customs Act section 33.6.

Can I defer the decision on CUSMA origin and claim it later?

Yes. File your CAD at MFN rates, pay the higher duty, and obtain release. You have four years from the date of accounting to file a CARM Portal adjustment request with supporting origin documentation under Customs Act section 74. This is safer than filing a false CUSMA claim you cannot defend.

Do Brazilian goods imported directly into Canada face the proposed U.S. tariff?

No. The proposed 25% U.S. tariff applies only to goods entering U.S. commerce. Canadian importers bringing Brazilian goods directly into Canada pay Canadian MFN duty rates or preferential rates under bilateral agreements. Check the Canadian Customs Tariff for current HS 6-digit rates.

Should I audit my CUSMA origin claims now or wait until CBSA requests verification?

Audit now. A proactive compliance review catches invalid claims before CBSA does. If you discover an error, you can voluntarily correct past entries under the Voluntary Disclosures Program and avoid AMPS penalties, which start at CAD 400 per contravention under the Master Penalty Document.

Source: Supply Chain Dive