Key Takeaways
- CUSMA Article 34.7 triggers a formal review by 1 July 2026; if no agreement is reached, parties may withdraw on six months' notice, making July 2029 the earliest possible exit date.
- Commercial Accounting Declarations filed today already rely on CUSMA preferential origin; any mid-review tariff changes will require updated HS classifications and new security calculations for RPP bonds.
- CBSA origin verifications under CUSMA Article 5.9 continue during the review period, so certificates of origin must remain audit-ready for the full four-year retention window.
- Importers with dual-sourcing (Mexico and non-CUSMA) should model MFN duty exposure now, before rate schedules change and before your CARM Client Portal bond is undersized.
CUSMA review window closes 1 July 2026
The USMCA (known in Canada as CUSMA) includes a sunset clause: Article 34.7 requires all three parties to jointly review the agreement by 1 July 2026 and decide whether to extend for another sixteen years. If no consensus is reached, any country may withdraw on six months' notice, making 1 January 2027 the earliest possible exit and 1 July 2029 the final sunset date if all three parties choose to leave.
For Canadian importers filing Commercial Accounting Declarations under CARM, the question is not political. It is operational: if preferential origin rates disappear mid-year, what happens to your release prior to payment bond security, your supplier agreements, and your cash-flow model?
What CUSMA origin claims mean on a CAD today
Every time you file a CAD through the CARM Client Portal and claim CUSMA preferential origin, you are certifying that the goods meet the Chapter 4 rules of origin, that you hold a valid Certificate of Origin, and that the exporter or producer has signed the certificate within the required window. CBSA accepts the claim at release and collects duty at the preferential rate (often zero for industrial goods, or a reduced rate for textiles and auto parts).
If CUSMA lapses or is renegotiated with new schedules, those same goods will pay the MFN (Most Favoured Nation) rate under Column 1 of the Customs Tariff. For many HS 6-digit codes, that rate is 6 to 8 percent higher. For dairy, poultry, and some textiles, the gap is wider.
The immediate compliance risk is not that you filed wrong last week. It is that your RPP bond security is sized on trailing duty liability, and if MFN rates kick in, your monthly K84 statement will show insufficient coverage. CBSA will either hold your next shipment until you top up the bond, or suspend release prior to payment altogether.
Origin verification continues during the review period
CUSMA Article 5.9 allows CBSA to verify origin for four years after import. That window does not pause during the review period. If you claimed preferential treatment on a CAD filed in January 2025, CBSA may request your Certificate of Origin and supporting production records any time before January 2029, regardless of whether CUSMA is extended, amended, or withdrawn.
We see CBSA verification requests pick up in Q4 and Q1 every year, when the agency closes out its audit targets. If your certificates are missing supplier signatures, have the wrong date range, or cite the wrong tariff classification, CBSA will re-rate the entry at MFN and assess the duty difference plus interest. Under AMPS (Administrative Monetary Penalty System), a missing or incomplete certificate can also trigger a penalty ranging from CAD 500 to CAD 2,000 per occurrence.
The practical takeaway: keep your origin documentation audit-ready for the full retention window, even if the trade agreement itself is under review.
RPP bond security and the MFN rate shock
Release prior to payment bonds are sized at 10 percent of your trailing twelve-month duty and GST liability, with a CBSA-set minimum (typically CAD 25,000 for most mid-market importers). If preferential rates revert to MFN, your monthly duty bill rises, and your existing bond may no longer cover the minimum CBSA requires.
For importers who move 300–500 entries per month of Mexico-origin goods, the gap can be material. A product line that pays zero duty under CUSMA but 6.5 percent MFN will add tens of thousands of dollars to your monthly accounting, and your surety will want the bond increased before CBSA flags the shortfall on your K84 statement.
We routinely see importers scramble to top up RPP bond security after a tariff schedule change, because they modelled cash flow on preferential rates and did not budget for the MFN delta. If you have high-volume lines from Mexico or the US, run the MFN numbers now and confirm your bond headroom with your broker.
Dual-sourcing and tariff-engineering before July 2026
If your supplier has operations in both Mexico and a CETA-eligible country (EU member states, plus the UK under the Canada-UK TCA), you can split purchase orders and claim CETA origin for goods that actually originate in the EU. CETA is not under review, and its preferential rates remain valid regardless of CUSMA's outcome.
The catch: CETA rules of origin are product-specific, and many require a higher regional value content threshold than CUSMA. Automotive parts under CETA, for example, must meet a 55 percent net cost calculation, whereas CUSMA allows a 62.5–75 percent threshold depending on the component. If your supplier cannot meet CETA's origin test, the CETA claim fails, and you pay MFN duty regardless.
Tariff engineering takes time. Suppliers need to pull bills of material, run value-content worksheets, and verify that subcomponents meet the tracing rules. If you wait until 1 July 2026 to ask, you will be negotiating supplier terms and re-booking freight while your competitors have already locked in CETA-origin supply.
Our compliance team runs origin feasibility reviews for dual-sourced SKUs. We pull the CUSMA and CETA rules of origin for your HS code, compare the regional value content thresholds, and flag which supplier locations can support which certificates. The goal is not to pick the cheapest origin, it is to pick the one that survives a CBSA verification and keeps your import duty predictable when trade agreements change.
Warehousing and deferral risk if MFN rates kick in mid-year
If you hold inventory in a bonded or sufferance warehouse, duties are not payable until you file the CAD for domestic release. If CUSMA lapses or is amended mid-year, goods released after the effective date will pay the new rate schedule, even if they arrived under the old agreement.
For importers who use FENGYE's Montreal sufferance warehouse to defer duty on high-volume seasonal goods, that timing matters. If you bring in 40,000 units in May 2026 under CUSMA preferential rates, store them in bond, and release them piecemeal through Q3, any release after the schedule change will pay MFN duty. The arbitrage you planned on disappears.
The safer play: model your release cadence now, and decide whether to pull forward domestic release before 1 July 2026 or accept the MFN rate risk. Neither answer is wrong, but waiting until June to decide leaves you no buffer if CBSA processing times slip or if your warehouse provider has a backlog.
What to do before the review deadline
Run your MFN duty exposure for every Mexico-origin and US-origin line you import. Pull the HS 6-digit code, check the Customs Tariff Column 1 rate, and multiply by your trailing twelve-month volume. That number is your cash-flow risk if CUSMA preferential rates go away.
Review your RPP bond security and confirm you have headroom for a 20–40 percent duty increase. If your bond is already close to the CBSA minimum, top it up now, before the K84 statement flags a shortfall.
Audit your CUSMA Certificates of Origin and make sure every certificate filed in the last four years is signed, dated, and retained with the supporting production records. If CBSA opens a verification during the review period, missing documentation will cost you the preferential rate plus interest and penalties.
If you have dual-sourcing options, ask your supplier to run a CETA origin feasibility analysis now. If the goods can qualify under CETA, you have a hedge. If they cannot, you have time to find a new supplier or accept the MFN rate.
We file CADs every day where CUSMA origin claims are the difference between zero duty and a five-figure monthly bill. When the review window closes and tariff schedules change, that delta hits cash flow immediately. Get in touch if you want to model the numbers before July.
Frequently Asked Questions
When does CUSMA expire if the review fails?
CUSMA Article 34.7 requires a joint review by 1 July 2026. If parties do not agree to extend, any country may withdraw on six months' notice, making 1 January 2027 the earliest possible withdrawal date and 1 July 2029 the sunset if all parties exit. The agreement does not auto-expire on 1 July 2026.
Do I still claim CUSMA origin on my CAD filings during the review?
Yes. Until CBSA publishes a formal tariff-schedule amendment, your Commercial Accounting Declaration should continue to claim preferential origin where goods qualify under CUSMA Chapter 4 rules of origin. Failing to claim when eligible costs you the MFN delta immediately.
What happens to my RPP bond if CUSMA preferential rates disappear?
Release prior to payment bonds are sized on trailing import duty and GST. If preferential rates revert to MFN, your monthly duty liability rises, and CBSA will flag insufficient security on your next CARM K84 statement. We routinely see RPP minimums jump 20–40 percent when origin claims fall off for a single high-volume HTS line.
Can CBSA audit my CUSMA certificates of origin after the review starts?
Yes. CUSMA Article 5.9 permits origin verification for four years after import. CBSA origin verifications continue during the review period, and any Certificate of Origin signed before July 2026 remains subject to audit through its retention window.
Should I dual-source now or wait until July 2026?
Model the MFN duty cost now. If your Mexico-origin line pays zero under CUSMA and 6.5 percent MFN, and you import 500 entries per year, that gap will hit your cash flow the day the schedule changes. Waiting until July 2026 leaves you four weeks to negotiate supplier terms and re-book freight.
Does CARM Phase 2 change how I file preferential origin?
No. The CARM Client Portal replaced the old B3 form with the Commercial Accounting Declaration, but the tariff treatment field and certificate upload requirements remain identical. You still declare origin at line level, and CBSA still pulls certificates during verification.
What is the MFN duty rate for my HTS code if CUSMA goes away?
Check the CBSA Customs Tariff schedule for your HS 6-digit code. Column 1 (MFN) rates apply to all WTO members, including Mexico and the US, if preferential agreements lapse. Our HS classification tool shows both MFN and preferential rates side by side.
Can I switch from CUSMA to CETA mid-year if my supplier has EU operations?
Yes, but only if the goods actually originate in the EU under CETA rules of origin. You cannot retroactively claim CETA for goods that left Mexico. If your supplier manufactures the same SKU in Poland, you can split your purchase orders and file separate CADs with CETA origin certificates going forward.
Originally published at https://www.canflow-global.com/en/insights/cusma-renewal-uncertainty-and-what-it-means-for-your-cad-filings/.
