CUSMA review at six years: what Canadian importers need to watch

Key Takeaways

• CUSMA hits its six-year review in 2026, and any changes to automotive or textile rules of origin will ripple straight into your CAD filing requirements and CBSA origin verification workload.
• If the U.S. tightens content thresholds or tweaks de minimis treatment, expect CBSA to mirror those changes in how they audit preference claims on northbound shipments.
• Origin declarations filed today under existing criteria may face retroactive scrutiny if rules shift mid-cycle, so document supplier affidavits and regional value-content worksheets now.
• Talk to your broker before 2026 if you run high-volume automotive, apparel, or steel imports claiming CUSMA preference; template origin statements may need revision once negotiations close.

CUSMA at six years: review window opens in 2026

The National Association of Manufacturers called CUSMA—known in the U.S. as USMCA—the most pro-manufacturing trade deal in history, then promptly published a wish list for the six-year review. That review opens in mid-2026, three years after CARM Phase 2 Release 3 pushed all Canadian import filings onto the Commercial Accounting Declaration. If Washington pushes for tighter automotive rules of origin or stricter textile yarn-forward provisions, the changes will show up in your CAD preference fields within weeks of the amendments taking effect.

For Canadian importers claiming CUSMA tariff preference on high-volume categories like automotive parts, apparel, steel, or machinery, the next eighteen months are the time to audit your origin documentation, supplier affidavits, and regional value-content worksheets. CBSA origin verification teams run thousands of audits each year, and any rule tightening will raise the bar for what counts as acceptable proof.

What U.S. manufacturers want, and why Canadian brokers care

The NAM report asks for faster customs processing, streamlined certificate-of-origin procedures, and clarifications on product-specific rules of origin—especially automotive and textiles. None of that sounds threatening until you realize that “clarification” usually means “make the test harder.” If the U.S. succeeds in raising North American content thresholds for passenger vehicles from 75 percent to something higher, or tightening the labor value-content formula, CBSA will mirror those criteria when auditing your preference claims on goods moving north.

We file CADs claiming CUSMA preference every day. The current Chapter 5 certificate-of-origin process works: the importer, exporter, or producer completes the cert, you declare preference on the CAD, and CBSA releases the shipment under tariff treatment 20. But the moment Washington and Ottawa agree to amend Annex 4-B automotive provisions, every blanket certificate on file will need review. Supplier affidavits that passed muster in 2023 may no longer cover the new content formula in 2027.

Origin verification scope will widen before it narrows

CBSA already runs a high audit rate on automotive and textile imports because those sectors have product-specific rules and tight thresholds. If the review tightens rules, expect verification letters to arrive faster and dig deeper. A typical origin verification under Customs Act section 42.01 asks for bills of material, HS 6-digit classification of every input, production records, and third-party cost breakdowns. If your supplier in Michigan or Monterrey cannot produce a regional value-content worksheet that matches the new formula, CBSA will deny the preference claim and assess MFN duty retroactively.

The four-year lookback window means any CAD filed today remains open to reassessment until 2028 or later. Document your origin now. We routinely see clients scrambling to reconstruct supplier cost data two years after the fact when CBSA sends a verification letter. By then, the supplier has changed ERP systems, the production manager has moved on, and the cost breakdown is gone.

What changes to watch between now and mid-2026

Three categories matter most for Canadian importers:

Automotive rules of origin

CUSMA already requires 75 percent regional value content for passenger vehicles and light trucks, with additional labor value-content and steel-and-aluminum purchase requirements. If NAM and its Mexican counterparts push that number higher, the ripple hits Canadian assembly plants, tier-one suppliers, and every importer bringing finished vehicles or major sub-assemblies across the border. Your customs brokerage team will need updated supplier declarations and revised origin templates before the new rules go live.

Textile and apparel yarn-forward rules

CUSMA requires that yarn, fabric, and finished garments all originate in North America to qualify for preference. Any softening of that rule helps apparel importers; any tightening raises duty costs overnight. Textile traders should talk to their brokers now about whether existing certificates of origin will survive the review, or whether you need to renegotiate terms with suppliers in the U.S. and Mexico before 2026.

De minimis and express thresholds

CUSMA’s express-shipment chapter sets de minimis at CAD 150 for duty and CAD 40 for tax. If the U.S. lobbies to raise or eliminate those thresholds to level the playing field with low-value e-commerce, Canadian express carriers and freight forwarders will see filing-requirement changes within months. That shift would force more low-value parcels through formal CAD entry instead of courier low-value statements, raising clearance costs for cross-border e-commerce sellers.

What to do with your existing CUSMA claims

If you currently claim CUSMA preference on recurring shipments, review your documentation stack:

• Blanket certificates of origin: valid for 12 months, covering identical goods. If your supplier’s production process or input sourcing has changed since the cert was signed, get a new one before CBSA asks.
• Supplier affidavits: many importers rely on a producer’s statement that goods qualify. If rules change, that statement may no longer be accurate. Ask your supplier to confirm the new criteria in writing.
• Regional value-content worksheets: automotive and certain machinery categories require detailed RVC calculations. If the formula changes, your worksheet template will need revision.
• HS 6-digit classification of inputs: CBSA matches your finished-good HS code and your inputs’ codes to the product-specific rule in Annex 4-B. Misclassification at the input level can disqualify the entire claim.

We keep origin templates and RVC calculators updated in the CARM Client Portal for clients who file under standing authority. If you self-file CADs, make sure your internal compliance team has access to the current CUSMA text and the CBSA D-memoranda that interpret it.

Cross-border warehousing and CUSMA claims

If you run a bonded or sufferance warehouse in Canada and receive CUSMA-origin goods from the U.S., remember that preference is claimed on the CAD at the time of release into Canadian commerce, not at the time the goods enter the warehouse. FENGYE LOGISTICS operates sufferance facilities near the Port of Montreal, and we see regular confusion over when to complete the certificate of origin and when to declare preference. The rule: you claim preference when you file the CAD for home consumption, not when the goods land on the dock.

If your supplier ships under bond and you store the goods in sufferance for weeks before releasing them, make sure the certificate of origin is dated and signed before the CAD goes in. CBSA will reject a cert signed after the import date, and you will pay MFN duty while you sort it out.

Timing: when will amendments take effect?

The six-year review starts in mid-2026. Negotiations typically run six to twelve months, followed by parliamentary or congressional ratification, depending on the scope of changes. Small administrative tweaks can take effect within months; significant rule amendments may not go live until 2027 or early 2028. CBSA will publish implementation notices and updated D-memoranda once Canada signs the amendment protocol.

If you import high volumes under CUSMA preference, plan to revisit your origin documentation in Q1 2026. By the time the review concludes, you want your supplier agreements, cost breakdowns, and blanket certificates already compliant with the likely changes. Retroactive fixes are expensive: CBSA can reassess duties for up to four years, and if your origin claim was wrong at the time of filing, the duty bill plus interest adds up fast.

Final thought

CUSMA works. The tariff preference is real, the duty savings are measurable, and the certificate-of-origin process is lighter than the old NAFTA 434 form. But trade agreements are never finished. The 2026 review will bring changes, and the ones that matter most to Canadian importers will show up first in origin verification letters and CAD coding errors.

If your import program leans heavily on CUSMA preference, especially in automotive, textiles, or steel, this is the year to document your supply chain and confirm your suppliers can prove origin under tighter rules. We run origin audits and RVC calculations for clients who want to know where they stand before CBSA asks. Get in touch if you need a second set of eyes on your certificates or your CAD template before the review lands.

Frequently Asked Questions

When does the CUSMA six-year review start?

The agreement entered force July 1, 2020, so the first formal review opens in mid-2026. CBSA and the Canada Border Services Agency will participate alongside U.S. and Mexican trade officials to assess whether the text needs amendment.

What happens to my existing CUSMA origin claims if the rules change?

CBSA applies the tariff treatment and origin criteria in effect on the date of importation. If new rules take effect after your goods clear, your CAD filing stands as filed. If changes are retroactive, CBSA can request supporting documentation under Customs Act section 42.01 for up to four years post-release.

Do I need a certificate of origin for every CUSMA shipment?

No. Under CUSMA Chapter 5, the importer, exporter, or producer may complete a certificate of origin for shipments valued over CAD 3,300. Below that threshold, you still claim preference on the CAD but documentation requirements are lighter. CBSA can still verify.

How often does CBSA run origin verification audits on CUSMA claims?

CBSA publishes annual compliance stats through its Departmental Results Reports, showing thousands of origin verifications each year. Automotive and textile sectors see higher audit rates because rules of origin are product-specific and complex.

Will a stricter CUSMA affect my RPP bond or release times?

Probably not directly. Your RPP bond size is driven by total duty and GST at risk over 30 days. If tighter origin rules disqualify some preference claims, your effective duty liability rises and your surety may ask for a higher bond. Release timing stays the same unless CBSA flags a shipment for origin verification.

Should I refile old CADs if CUSMA rules change?

Only if the new rules are more favourable and you want to claim a refund. You have four years from the date of payment to file a CARM correction or drawback request. If the new rules are stricter, CBSA will notify you if they intend to reassess; you don’t need to self-report.

What origin documentation does CBSA want to see during a verification?

Supplier affidavits, bills of material showing HS 6-digit classification of inputs, regional value-content worksheets, and a completed certificate of origin signed by the exporter or producer. If you claim automotive preference, expect requests for production records and third-party material cost breakdowns.

Can I use a blanket certificate of origin for recurring CUSMA shipments?

Yes. A blanket certificate covers multiple shipments of identical goods for up to 12 months. You still declare the preference on each CAD and reference the blanket certificate number. Keep a copy on file for CBSA verification and update it annually or when your supplier’s production changes.

Source: Supply Chain Dive