Mexico–US–Canada Trade 2026: USMCA Rules of Origin, IMMEX Manufacturing and the Joint Review
The United States–Mexico–Canada Agreement (USMCA, known as T-MEC in Mexico) replaced NAFTA on 1 July 2020, and 2026 turned out to be its most consequential year yet: the treaty's first six-year joint review took place on 1 July 2026. For manufacturers, exporters and anyone structuring a North American supply chain, here are the rules that matter now.
What USMCA does
USMCA keeps most North American trade tariff-free — provided goods originate in the region under the agreement's rules of origin. Non-originating goods face each country's MFN (most-favoured-nation) tariffs instead. The agreement also modernized NAFTA with chapters on digital trade, labor standards (including Mexico's labor reform commitments), the environment, and stricter automotive content rules.
Rules of origin: the automotive core
Autos are where the rules bite hardest. To cross borders duty-free, passenger vehicles, light trucks and core parts must meet a 75% regional value content (RVC) threshold (net cost method), phased in from 66% in 2020 to the full 75% by 2023. Supporting thresholds:
| Category | RVC requirement |
|---|---|
| Passenger vehicles, light trucks, core parts | 75% |
| Principal parts | 70% |
| Complementary parts | 65% |
On top of that: 70% of a vehicle producer's steel and aluminum purchases (by value) must originate in North America, and from 2027 all steel manufacturing processes must occur within a USMCA country. There are also labor value content (LVC) rules requiring a share of production by workers earning at least US$16/hour. If your product cannot document origin to this standard, the 0% USMCA rate is off the table — origin certification and supplier affidavits are the paperwork that makes or breaks the claim.
IMMEX: Mexico's manufacturing engine
The IMMEX program (Industria Manufacturera, Maquiladora y de Servicios de Exportación) is the legal chassis behind most export manufacturing in Mexico. Authorized firms may temporarily import raw materials, components, inputs, machinery and equipment for processing, transformation, repair or export services, while deferring import duties (IGI), VAT (IVA) and applicable countervailing duties. The taxes only become payable if the goods are not exported, re-exported, or converted to a definitive import within the legal deadlines (for example, 18 months for inputs).
In practice: a company sets up (or contracts) a Mexican operation, imports components duty-deferred under IMMEX, assembles or processes them with Mexican labor, and exports the finished goods — most often to the United States — with USMCA origin treatment where the content rules are met. The classic maquiladora model, modernized.
Beyond autos: de minimis, digital trade and labor
Two more USMCA features matter for smaller operators:
- De minimis thresholds for express shipments: Mexico allows duty-free entry up to US$117 (and tax-free up to US$50); Canada allows C$150 duty-free (C$40 tax-free); the US keeps its US$800 threshold. For e-commerce sellers shipping into Mexico, the US$117 line is the number to design around.
- Digital trade chapter: no customs duties on electronic transmissions, no forced data localization as a condition of doing business, and legal validity for e-signatures — the framework behind cross-border SaaS and digital services.
- Labor chapter: Mexico's 2019 labor reform (secret-ballot union votes, independent labor courts) was a USMCA condition. Facilities can face the agreement's Rapid Response Labor Mechanism — a complaint-driven process that has already been used against Mexican auto-parts and manufacturing plants. If you operate or source from Mexican factories, labor compliance is now a trade-compliance issue.
The 2026 joint review: what actually happened
Article 34.7 of USMCA required the three countries' Free Trade Commission to meet on the 6th anniversary (1 July 2026) and decide whether to extend the agreement for another 16 years. The confirmed outcome:
- The Commission met virtually on 1 July 2026.
- The United States declined to extend USMCA in its current form; Mexico and Canada supported extension.
- The agreement remains fully in force — its 16-year term runs to 1 July 2036.
- Under Article 34.7, the parties now hold annual joint reviews until all three confirm extension in writing.
- On 5 October 2026, USTR opened a public consultation ahead of the 2027 annual review.
What is not confirmed: any renegotiated terms. Changes to RVC percentages, steel/aluminum rules, or the resolution of US tariff concerns are all speculation until a text is published. Plan around the rules as they stand.
Tariff benefits in practice
| Scenario | Treatment |
|---|---|
| Goods meeting USMCA origin rules | 0% duty between the three countries |
| Goods failing origin | MFN tariff of the importing country applies |
| Manufacturing inputs imported temporarily under IMMEX | IGI/IVA/countervailing duties deferred until export or definitive import |
| US Section 232 / IEEPA-type tariffs (where in effect) | Separate from USMCA — check current US measures independently |
Next steps
- Map your bill of materials against the 75%/70%/65% RVC thresholds and the 70% steel/aluminum rule before assuming duty-free treatment.
- If manufacturing in Mexico for the US market, evaluate IMMEX authorization (or a shelter/contract-manufacturing partner already holding it) — the duty deferral is often the difference between a viable and unviable cost structure.
- Watch the annual review cycle, not the headlines: the agreement is in force through 2036, but each annual review (next: 2027) is a window where terms could change. Build origin documentation that survives an audit under either outcome.
- Get origin certifications from suppliers in writing — a USMCA claim without supplier affidavits is an audit waiting to happen.