Short answer: A product qualifies for USMCA (United States-Mexico-Canada Agreement) preference when it meets the product-specific rule that Annex 4-B of the agreement assigns to its tariff heading or subheading. In the United States those rules sit in General Note 11 of the HTSUS (US Harmonized Tariff Schedule). The HTS code of the finished good tells you which rule applies, and the HTS codes of the non-originating inputs tell you whether the required tariff shift happened. Where the rule offers a regional value content (RVC) test instead, you calculate it by the transaction value method or the net cost method, and you keep a certification of origin and the supporting records for five years.
A USMCA claim usually goes wrong before anyone opens a spreadsheet: the finished good sits in the wrong subheading, so the team tests the wrong rule, or nobody has classified the imported parts at all. Below, the method in order, then two products carried through it: an industrial pump and an automotive lamp based on a CBP ruling. Rates, rules and program status were checked against the USMCA text on ustr.gov, 19 CFR Part 182, CBP rulings HQ H344538 and HQ H350927, USITC Publication 5443 and USTR’s July 2026 joint review statement on October 16, 2026.
How does USMCA origin work in four steps?
USMCA origin works as a fixed sequence. Article 4.2 gives four ways to be originating: wholly obtained or produced in the region, produced only from originating materials, meeting the Annex 4-B product-specific rule, or (outside Chapters 61 to 63) a fallback RVC of 60% under transaction value or 50% under net cost where parts and good share a heading or subheading. Manufactured goods with imported parts almost always take the third route.
- Classify the finished good to the subheading and read its rule in Annex 4-B (General Note 11(o) in the HTSUS).
- Split the bill of materials into originating and non-originating inputs, and classify every non-originating input.
- Test the tariff shift for each non-originating input, apply the 10% de minimis allowance if some inputs fail, and run the RVC where the rule requires or offers it.
- Complete the certification of origin, claim preference on the entry, and keep the records.
Step 1: how do you find the rule for the finished good?
You find the rule by classifying the finished good first, because Annex 4-B is organized by HS chapter, heading and subheading, and the rule for one subheading can differ sharply from its neighbor. The HTSUS reproduces the rules in General Note 11, and CBP rulings cite them by chapter and rule number, for example “GN 11(o), Chapter 84, rule 40”. Rules require a change of chapter, heading or subheading, often with exclusions (“except from heading 40.09 through 40.17”), and many offer an RVC as an alternative or add one to a narrower shift.
Many rules for goods that can go into vehicles, such as the Chapter 40 rules for rubber hoses and belts, carry a footnote: if the good is for use in a vehicle of Chapter 87, the automotive appendix to Annex 4-B applies. That appendix lists parts in tables (A.1, A.2, B, C and others) with their own RVC thresholds. Going into a car does not put a part in a table: in HQ H344538 (September 11, 2025), CBP noted that subheading 8413.60 is not listed in the automotive appendix, although the pump was built for a passenger vehicle transmission.
Step 2: why classify every non-originating input?
Every non-originating input needs its own HTS code because the tariff-shift test compares each input’s classification with the finished good’s. Materials of undetermined origin count as non-originating in the RVC formula (Article 4.5). In practice the bill of materials needs four extra columns: subheading, country of origin, originating status (backed by a supplier certification or written representation) and value.
This is the slowest part of the job: a pump with 60 purchased parts needs 60 classifications. TariffWolf’s bulk classification service gives each line of a full bill of materials a 6-digit HS code, citing the section and chapter notes, the GRIs applied and the CBP rulings behind it, and it sends low-confidence lines to an in-house classifier, so the tariff-shift test starts from codes you can defend in a verification. Where a rule or the entry needs more digits, your classifier or broker chooses them.
How does tariff shift work with the de minimis allowance?
Tariff shift works by asking whether each non-originating input moved from the classification the rule allows into the classification of the finished good. If every non-originating input makes the required change, the good is originating under that rule. If one input fails, Article 4.12 gives a second chance: the good is still originating when the value of all non-originating materials that fail the shift is no more than 10% of the good’s transaction value (adjusted to exclude international shipping) or of its total cost.
Take the Annex 4-B rule that covers heading 40.10 (conveyor and transmission belts of vulcanized rubber) together with heading 40.11 (new pneumatic tires): “A change to heading 40.10 through 40.11 from any other heading, except from heading 40.09 through 40.17.” A Mexican belt maker using imported compounded rubber and polyester fabric passes easily. If the same plant bonds on imported molded rubber cleats that classify in heading 40.16, those cleats fail the shift, and because this rule has no RVC alternative, the 10% de minimis is the only way the belt can still qualify.
De minimis has limits. Annex 4-A switches it off for listed agricultural goods such as dairy, sugar, certain juices and instant coffee. Textiles use weight instead of value (Article 6.1): failing materials may be up to 10% of the good’s total weight, with elastomeric content capped at 7%, and for Chapters 61 to 63 the limits apply to the component that determines the classification. Where the rule also carries an RVC, de minimis materials still count in VNM.
Regional value content: transaction value or net cost?
Regional value content measures the share of a good’s value not attributable to non-originating materials. Under the transaction value method, RVC = (TV – VNM) / TV x 100, where TV is the customs value of the good adjusted to exclude international shipping costs and VNM is the value of non-originating materials, including materials of undetermined origin. Under the net cost method, RVC = (NC – VNM) / NC x 100, where net cost is total cost minus sales promotion, marketing and after-sales service costs, royalties, and the shipping, packing and interest costs the agreement excludes.
The importer, exporter or producer may choose either method unless the rule provides only a net cost option (Article 4.5, paragraphs 1 and 6). The threshold comes from the rule, not from Article 4.5. Many general rules use 60% under transaction value or 50% under net cost; automotive goods carry higher figures. The table lists the thresholds this guide uses and where each one was confirmed.
| Good | RVC threshold | Where it comes from |
|---|---|---|
| Pumps of subheadings 8413.11 to 8413.82 (rule with parts from 8413.91 to 8413.92) | 60% transaction value or 50% net cost | GN 11(o), Chapter 84 rule 40, as quoted in HQ H344538 |
| Fallback route in Article 4.2(d) | 60% transaction value or 50% net cost | USMCA Article 4.2(d) |
| Table C complementary parts for passenger vehicles and light trucks (for example lamps of 8512.20) | 65% net cost or 75% transaction value | Automotive appendix Article 3.5, as quoted in HQ H350927 |
| Table B principal parts for passenger vehicles and light trucks (for example a water pump) | 70% net cost | 19 CFR Part 182 Appendix A, Section 4, Example 1; USITC Publication 5443 |
| Passenger vehicles, light trucks and the core parts in Table A.2 | 75% | USITC Publication 5443 (full phase-in July 1, 2023); USTR fact sheet |
| Heavy trucks | 70% for the vehicle, phased in through July 1, 2027 | USITC Publication 5443 |
| Vehicle producer’s steel and aluminum purchases | 70% must originate in North America | 19 CFR 182.94 (producer obligation); USITC Publication 5443 |
Two points from that table are often misstated. Net cost is not compulsory for every automotive good: in HQ H350927 CBP accepted 75% under transaction value as an alternative to 65% under net cost for Table C lamps. And the 70% steel and aluminum figure is a purchasing test that 19 CFR 182.94 places on the vehicle producer. It is not a product rule for steel parts; USITC Publication 5443 notes that a melted-and-poured condition on the producer’s steel purchases starts July 1, 2027. Vehicles also carry a labor value content (LVC) requirement: 40% for passenger vehicles and 45% for light trucks, measured as the share of the vehicle’s value from high-wage labor, meaning plants paying an average base wage of at least US $16 per hour (19 CFR 182.95).
Worked example: an industrial pump
The first example is a hypothetical centrifugal process pump made in Monterrey and sold to a US chemical plant. Assume it classifies in subheading 8413.70 (other centrifugal pumps). The rule that GN 11(o) gives for subheadings 8413.11 through 8413.82, as quoted in HQ H344538, has two branches: (A) a change from any other heading, or (B) a change from subheadings 8413.91 through 8413.92 (pump parts), provided the RVC is at least 60% under transaction value or 50% under net cost. The figures below are invented for illustration.
| Input | Subheading (example) | Origin | Value per pump | Branch (A) shift? |
|---|---|---|---|---|
| Cast iron volute casing | 8413.91 | China | $95 | No |
| Impeller | 8413.91 | India | $40 | No |
| Electric motor | 8501.52 | China | $120 | Yes |
| Mechanical seal | 8484.20 | Germany | $30 | Yes |
| Bolts | 7318.15 | Taiwan | $6 | Yes |
| Stainless shaft | Originating (US mill, supplier certification) | US | $35 | Not tested |
Branch (A) fails because the casing and impeller are pump parts of heading 84.13, the same heading as the pump. De minimis does not rescue it: the failing materials are $135 against an adjusted transaction value of $900, or 15%, above the 10% ceiling. Branch (B) allows the change from 8413.91 if the RVC is met. Every non-originating input counts in VNM, so VNM = $95 + $40 + $120 + $30 + $6 = $291.
- Transaction value method: ($900 – $291) / $900 x 100 = 67.7%, which clears 60%.
- Net cost method, assuming a net cost of $760: ($760 – $291) / $760 x 100 = 61.7%, which clears 50%.
The pump is originating under branch (B). HQ H344538 shows the same pattern with real figures for a transmission fluid pump of 8413.60 made in Canada: branch (A) failed on materials of heading 84.13, de minimis failed at about 18%, and the transaction value RVC of 77.5% cleared 60%. In both cases the outcome turned on a classification question before any arithmetic: which purchased components fall in heading 84.13. Get that wrong and you run the wrong branch of the rule.
Worked example: an auto part
The second example follows HQ H350927 (October 9, 2025), in which CBP ruled on headlamps, side lamps and tail lamps of subheading 8512.20 made in Mexico as original equipment for US passenger vehicles and light trucks. The lamps are Table C complementary parts. The product-specific rule 85.31 reads, in substance, (A) a change to 8512.10 through 8512.40 from any other heading, or (B) a change from subheading 8512.90 (parts), with an RVC that the rule text sets at 60% transaction value or 50% net cost. Article 3.5 of the automotive appendix overrides those figures for Table C parts used in passenger vehicles and light trucks, so CBP held the applicable RVC to be 75% under transaction value or 65% under net cost. Article 3.5 also says a Table C part is originating if it meets the applicable change in tariff classification, so branch (A) needs no RVC at all.
Now apply it to a hypothetical headlamp with an adjusted transaction value of $120 and a net cost of $100. The non-originating inputs are a housing and reflector assembly from China classified in 8512.90 ($20), an LED light module from Malaysia classified outside heading 85.12 ($10) and a connector ($2). The housing fails branch (A) because it is a part of the same heading. De minimis fails too: $20 is 16.7% of $120. So the lamp needs branch (B), and VNM is $32.
- Transaction value method: ($120 – $32) / $120 x 100 = 73.3%, which misses 75%.
- Net cost method: ($100 – $32) / $100 x 100 = 68%, which clears 65%.
The headlamp qualifies, but only on net cost; a team that stopped after the transaction value calculation would have paid MFN duty on an originating part. Source the housing in Mexico and branch (A) is met with no RVC at all. The labor value content and steel and aluminum purchasing requirements attach to the vehicle producer, not the lamp maker.
What goes on the certification of origin, and what records do you keep?
USMCA has no prescribed certificate form. Under 19 CFR 182.12 the certification may be written or electronic, may appear on an invoice or other document (other than one issued in a non-USMCA country), and may be completed by the importer, the exporter or the producer. Annex 5-A of the agreement lists nine minimum data elements:
- Whether the certifier is the importer, exporter or producer
- Certifier
- Exporter
- Producer
- Importer
- Description and HS tariff classification of the good
- Origin criteria
- Blanket period
- Authorized signature and date
The US regulation adds that the classification must be given to six or more digits, the certification must name the applicable General Note 11 rule and carry the statement in 182.12(a)(5), and it may be in English, French or Spanish. A blanket certification may cover identical goods over up to 12 months, and a certification is valid for four years from completion. None is needed for commercial importations of originating goods worth $2,500 or less, unless CBP finds shipments were split to avoid the requirement (182.14). The claim is made by putting “S” or “S+” in front of the HTSUS subheading on the entry summary (182.11(b)), and originating goods are also exempt from the merchandise processing fee (19 CFR 24.23(c)(3)).
The importer must keep the records showing the good qualified, including the certification and transport records, for at least five years from importation (182.15); a certifying exporter or producer keeps its records for five years after the certification date (Article 5.8). A usable origin file for one SKU holds the rule text tested, the classified bill of materials with origins and values, supplier certifications for every input treated as originating, the shift, de minimis and RVC worksheets with the cost records behind net cost, and the certification tied to a BOM revision number.
Is USMCA still in force after the 2026 joint review?
Yes. At the July 1, 2026 joint review the United States did not agree to renew the agreement in its current form; USTR’s statement says “the USMCA is not renewed. However, the Agreement remains in force,” and the parties now hold annual reviews under Article 34.7. Preferences and rules of origin continue as before. As of October 2026, USMCA-qualifying goods of Canada and Mexico are also exempt from the 2026 forced-labor Section 301 duty, while the 50% Section 338 duties on listed Canadian goods apply whatever the USMCA status.
Common mistakes that sink USMCA claims
The most expensive mistake is classifying the finished good loosely. A lamp entered under a parts subheading, or a pump entered as a part of a machine, sends you to a different rule, and the whole analysis is then built on the wrong test. The second is treating Mexican or Canadian assembly as origin. Assembly in the region is where the analysis starts.
Smaller errors recur too. Teams read “from any other heading” and miss the “except from” list after it, apply de minimis to a dairy or sugar product that Annex 4-A excludes, run only the transaction value method, or guess whether a part is in an automotive appendix table. The quietest one is a blanket certification left running after a supplier change, so it describes a bill of materials that no longer exists.
Related reading
- Is your product covered by Section 232? Scope by HTS line and the metal content rules
- The forced-labor Section 301 tariff: 9903.05 headings by country, rates and exemptions
- Reading the General Interpretative Rules Correctly
- How to calculate US import duty when tariffs stack on one HTS line
Frequently asked questions
Does USMCA require a certificate of origin form?
No. USMCA has no official form; a certification can be on an invoice or any other document, in writing or electronically, as long as it contains the nine minimum data elements in Annex 5-A. In the US, 19 CFR 182.12 also requires the classification to six or more digits, the applicable General Note 11 rule and the certification statement.
What is the USMCA de minimis rule?
Under Article 4.12, a good that fails its tariff shift because of some non-originating materials is still originating if those materials are worth no more than 10% of the good’s adjusted transaction value or total cost. Textiles use weight instead (10% of total weight, with elastomeric content capped at 7%), and Annex 4-A excludes certain agricultural goods from de minimis altogether.
What RVC percentage does USMCA require?
It depends on the product-specific rule. Many general rules use 60% under transaction value or 50% under net cost. Complementary auto parts in Table C used in passenger vehicles and light trucks need 65% under net cost or 75% under transaction value, principal parts in Table B need 70% under net cost, and passenger vehicles, light trucks and their core parts face 75%.
Is USMCA still in effect in 2026?
Yes. The United States declined to renew the agreement at the July 1, 2026 joint review, but USTR stated that the agreement remains in force, and the parties now review it annually. Preferential treatment and the rules of origin continue unchanged as of October 2026.
A USMCA claim stands or falls on two things you can check before the goods ship: the correct HTS code for the finished good and each non-originating input, and the product-specific rule in General Note 11 that those codes point to. Get those right, keep the bill of materials and cost records behind the RVC calculation, and the certification becomes a document you can defend in a verification.
If you have bills of materials that still need HTS codes before anyone can run the tariff-shift test, TariffWolf’s bulk classification service returns the finished good and each input line at the 6-digit level with the notes and rulings behind it, and sends uncertain parts to a classifier for review. Your origin analysis then starts from codes you can explain.
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Sources
- USMCA Chapter 4, Rules of Origin (Articles 4.2, 4.5, 4.12; Annexes 4-A and 4-B)
- USMCA Chapter 5, Origin Procedures (Annex 5-A minimum data elements)
- USMCA Chapter 6, Textiles and Apparel (Article 6.1 de minimis by weight)
- 19 CFR Part 182, United States-Mexico-Canada Agreement
- CBP ruling HQ H344538 (September 11, 2025), transmission fluid pump
- CBP ruling HQ H350927 (October 9, 2025), automotive lamps
- USTR statement on the USMCA joint review (July 2026)
- USITC Publication 5443, USMCA Automotive Rules of Origin: Economic Impact and Operation, 2023 Report