USMCA Wasn’t Extended. It Didn’t Expire. Here’s What Changed.

On July 1, 2026, the United States declined to join Canada and Mexico in extending the USMCA. The agreement did not expire, and it still runs to 2036.

Had all three governments confirmed, the term would have been extended by a new 16-year period running from the review, moving the expiry from 2036 to 2042.

The review itself did not change the agreement. What changed around it was the cost of falling outside it, and the value of being able to prove that your product qualifies.

Tariff treatment described here is current as of September 11, 2026. Product-specific treatment depends on HTS classification and applicable exclusions.

What the July 1 decision changed, and what it did not

Nothing inside the agreement changed that day. Not a duty rate, not a rule of origin, not a dispute procedure.

The mechanism is simple enough. Article 34.7 ends the agreement 16 years after it took effect, which was July 1, 2020, unless all three governments confirm in writing that they want another 16-year term. On July 1 the United States did not confirm. Mexico and Canada did.

That decision did not shorten anything. The agreement runs to July 1, 2036 either way. Ending it sooner requires six months of written notice under Article 34.6, and no government has given that notice.

What the decision produced is an annual review cycle. And Article 34.7 is explicit that the parties do not have to wait for one of those meetings: at any time between the conclusion of a review and the agreement’s expiry, all three governments can extend the term by another 16 years simply by confirming in writing.

That is where the legal clock sits. It is a different thing from where the politics sit. If the negotiation itself is the open question rather than the operating consequences, the review process is covered in the USMCA 2026 review.

Why preference claims jumped from half to 80 percent

The best evidence for how manufacturers respond when USMCA qualification becomes more valuable arrived before the 2026 review.

Before 2025, USMCA preference was claimed on roughly half of US imports from Mexico. By July 2025 that share was about 80 percent, according to the Federal Reserve Bank of Dallas in August 2026. In July 2026, 80.2 percent of imports from Canada and Mexico combined claimed a USMCA exemption, per the Penn Wharton Budget Model.

The reason matters. When the tariff outside USMCA was relatively small, many companies concluded that certification, documentation and regional-sourcing costs were not worth the savings. When the gap widened, that calculation changed.

The jump does not tell us exactly how companies adjusted. Some may have changed sourcing. Others may simply have documented and claimed preference that previously was not worth the administrative effort. What it does show is that behavior changed quickly once qualifying was worth more.

Made in Mexico is not the same as USMCA qualified

Made in Mexico does not automatically mean USMCA qualified. It is the most expensive misunderstanding in this category, and it costs money quietly.

Country of origin and USMCA originating status are separate customs determinations. A product can be treated as a product of Mexico without satisfying the USMCA rule required to receive preferential tariff treatment.

This is the distinction that decides your duty bill, and it is the one most often missed. For most manufactured goods, the analysis starts with these principal pathways:

There is no single North American content percentage that applies across the board. The rule follows the product’s tariff classification, which is why two goods coming off the same line can reach different answers.

So a plant in Monterrey can produce a good that is properly treated as a product of Mexico but does not qualify for USMCA preference. In that case the US importer may owe the ordinary tariff schedule duty and the additional 10 percent Section 301 tariff that took effect July 24, 2026, unless a product-specific or sectoral exemption applies.

Here is the part worth underlining. At entry, the Section 301 action exempts products of Mexico entered free of duty under USMCA. That means qualifying is not enough; the preferential treatment has to be claimed and supported. USMCA does provide a post-importation process for qualifying goods when preference was not claimed at entry, generally within one year, subject to CBP requirements.

That is what changed the economics of USMCA qualification over the past eighteen months. Whether your operation runs under an IMMEX program or your own structure, the qualification question is the same one.

What qualification does not do

Qualifying under USMCA does not make every tariff disappear. Some products carry duties that sit outside the agreement entirely, and those are charged on the product rather than on where it was made.

Since April 6, 2026, the Section 232 duties on covered steel, aluminum and copper articles and derivatives apply to the full customs value of the imported product, regardless of metal content. Metal content still matters, because it determines whether an article is covered at all and which rate applies. It is no longer the base the duty is calculated on.

The rules are granular in ways that reward reading them. One June 2026 provision gives a defined set of mobile industrial equipment and machinery from Canada and Mexico that qualify for USMCA preference a duty assessed on non-US content rather than full value, subject to a minimum effective duty of 15 percent. It does not apply to steel and aluminum products generally. That is the lesson in miniature: the answer follows the tariff code, not the country.

Do not assume one tariff rule answers the whole question. Some products fall under separate Section 232 rules, and those rules can change how Section 301 applies. The Section 301 action does not reach goods classified under a specified list of Section 232 provisions covering metals, autos and auto parts, medium and heavy duty vehicles and parts, wood products, semiconductors and patented pharmaceuticals, so the two do not stack in those cases. The answer follows the product classification, not the country on the carton.

For passenger vehicles and light trucks that qualify for USMCA preference, the importer may submit US-content documentation for a model line to the Secretary of Commerce. Where Commerce approves that model line, the 25 percent Section 232 tariff applies to the vehicle’s non-US content rather than its full value. If US content is overstated on an approved model line, the tariff can apply retroactively and prospectively to the full value of every vehicle in that model line imported by that importer.

Three ways a USMCA claim fails an audit

What this means for your operation

If you already produce in Mexico, your immediate duty exposure did not change because the agreement was not extended on July 1. What matters today is whether your products qualify under the rules now in force, whether you are actually claiming preference, and whether you can substantiate that qualification on demand.

If you are still deciding, design your sourcing and bill of materials with the applicable product-specific rule in mind, rather than assuming production in Mexico is enough. The site decision and the origin decision are separate questions, and the second is the one that shows up in landed cost.

That analysis belongs before the plant is designed around a sourcing plan, not after. You should know how your major inputs will enter Mexico, what happens to them there, what records the operation will have to maintain, and which finished goods require a closer USMCA or tariff analysis before you commit.

Where Tetakawi fits in the due diligence

If you are evaluating a Mexico operation, Tetakawi can help build that operating picture before you commit.

As part of our Mexico due diligence, Tetakawi performs customs and trade analysis around the proposed operation. Bring your intended bill of materials, source countries, product classifications and shipping flows, and we can work through the applicable USMCA rule of origin, the likely qualification path, Section 301 and Section 232 exposure, and the Mexican import, export and inventory control structure the operation would need to support.

There is still a boundary. The US importer of record retains its responsibilities to CBP, and where a company needs a formal legal position or certainty from Customs, its broker, trade counsel or a CBP binding ruling may be appropriate.

What we can do is make sure they are working from a clean operating picture of what enters Mexico, what happens to it, and what leaves.

That boundary matters because of where the liability sits. Your broker can file the entry, but the importer still owns the liability. Under US customs rules, payment to a broker does not relieve the importer if the duties are not paid correctly, and a commercial agreement between parties can allocate costs without changing what customs authorities require of the importer of record.

The paperwork works the same way. A certification of origin may be completed by the importer, the exporter or the producer, and the records behind it may sit with any of them or with suppliers. Who signs the certification does not eliminate the importer’s own responsibility for the entry and applicable duties. Exporters and producers also have their own certification and recordkeeping obligations.

For companies that go forward, we provide access to the Mexican operating entity and trade program, along with import and export administration, at our Manufacturing Campuses. That is where the Mexican side of the evidentiary chain gets built: the trade program, the required inventory controls, the import and export records, and the compliance discipline behind them. Those records do not replace your US origin analysis. They are what proves what actually moved into, through and out of the Mexican operation.

The question worth bringing is not whether Mexico still makes sense. It is which of your products qualify today, whether you are claiming it, and whether you can prove it.