USMCA RVC 75 Percent Auto Parts: Compute the Regional Value Content

USMCA Annex 4-B Appendix sets the most demanding rule of origin in any US free trade agreement: 75 percent regional value content on core auto parts, plus a 70 percent USMCA-region purchase requirement on steel and aluminum, plus a 40 to 45 percent labor value content on finished vehicles. For Tier-1 and Tier-2 auto parts importers, USMCA qualification is the single biggest tariff determinant.

This guide walks through the regulatory framework, the two RVC computation methods, the documentation required, and three worked examples for typical lanes.

Three nested rules

USMCA auto rules apply in three layers:

1. Article-level rule of origin (75 percent RVC on core parts). Each shipment of a covered HTS line must satisfy the 75 percent RVC for the article itself.
2. Producer-level steel and aluminum 70 percent. The producer of a vehicle or core part must certify, on a calendar-year basis, that 70 percent of its steel and aluminum spending was sourced from USMCA-region suppliers.
3. Vehicle-level labor value content (40 to 45 percent). Vehicle assemblers must certify the labor portion meeting wage and labor share thresholds.

For most parts importers, only rules 1 and 2 apply. The vehicle LVC is the OEM's responsibility, not the supplier's.

RVC computation methods

Transaction Value method:

RVC equals (TV minus VNM) divided by TV, times 100.

Where TV = transaction value of the article when sold to a related or unrelated party at the producer's premises, and VNM = value of non-originating materials used in production.

Net Cost method:

RVC equals (NC minus VNM) divided by NC, times 100.

Where NC = total cost incurred in production minus sales promotion, marketing, after-sales service costs, royalties, shipping and packing costs, and non-allowable interest. VNM is the same.

Net Cost is mandatory for vehicles and core parts when transaction value is unreliable (e.g., related-party transfer pricing). Transaction Value is generally simpler when the article is sold at arm's length.

What counts as non-originating

Materials from outside the USMCA region (Mexico, Canada, US) are non-originating. Specifically:

• Chinese, Korean, Japanese, German, or other extra-USMCA materials count as non-originating at full value.
• USMCA-region materials that themselves fail to qualify as originating (e.g., a Mexican-assembled component using mostly Chinese inputs) count as non-originating at full value, unless the de minimis rule applies (typically 10 percent).
• Labor and overhead in the USMCA region are part of the producer's value-add, not the VNM.

Worked example: Mexican engine block

A Mexican engine block plant produces aluminum engine blocks for a US OEM. HTS 8409.91 (parts for spark-ignition engines). Article transaction value $400 per unit.

Non-originating materials: 38 (Germany bushings) + 65 (China conrod) = 103.

RVC (TV) = (400 minus 103) divided by 400 = 74.25 percent.

This article does NOT qualify. The threshold is 75 percent. We are 0.75 percentage points short. The German bushings or the Chinese connecting rod must be re-sourced to USMCA, or the producer must move to Net Cost method to see if a different calculation crosses 75 percent.

Net Cost adjustment: assume non-allowable costs are $24 of the $400 transaction value, so NC = $376.

RVC (NC) = (376 minus 103) divided by 376 = 72.6 percent.

Net Cost is worse here. Re-sourcing is required. The cheapest move is replacing the $14 bolt set or the $22 gaskets with a higher USMCA value, or replacing the connecting rod with a Mexican supplier.

Worked example: USMCA-qualifying suspension strut

Canadian-assembled suspension strut, HTS 8708.80.65. Transaction value $180.

Non-originating: 18 (Japan top mount).

RVC (TV) = (180 minus 18) divided by 180 = 90 percent.

Qualifies easily. The Canadian producer issues a USMCA certificate of origin per shipment using the transaction value method.

The duty calculation on this article at $180 unit value, importing 10,000 units:

Effective rate 7.8 percent. USMCA wipes MFN and 122. Section 232 derivative still hits the Canadian steel content. If the Canadian producer can certify the steel is Canadian-melt within an active TRQ allocation, the 232 layer also zeros and the entry effective rate drops near zero.

Worked example: failing-to-qualify engine block routes through Vietnam

The same Mexican engine block that failed at 74.25 percent USMCA RVC could try a Vietnamese assembly route to avoid the duty disadvantage. The economics:

Effective rate 21.8 percent. Compare to the Mexican engine block under USMCA qualification (effective rate 0 to 7 percent if it cleared 75 percent RVC). The qualification gap drives the supplier-routing decision. Most Tier-1 producers find the marginal cost of re-sourcing a single component to qualify under USMCA is cheaper than absorbing 21 percent landed cost on the Vietnamese alternative.

Documentation

• Per-shipment USMCA certificate of origin signed by the producer, exporter, or importer.
• Bill of materials with HTS line, origin, and value per non-originating input.
• Producer self-declaration on the steel and aluminum 70 percent purchasing rule for the calendar year.
• Mill test reports for steel and aluminum identifying smelt or melt country.
• Records retained for 5 years from the date of importation.

Run your USMCA qualification now

The LandedFees calculator includes the chapter 87 USMCA rule of origin with both transaction value and net cost methods, the steel and aluminum 70 percent producer check, the Section 232 derivative split, and the qualification-failure routing analysis to compare USMCA vs. non-USMCA lanes.

Calculate a USMCA auto-parts shipment

Section 122 status as of June 20 2026

The May 7 2026 Court of International Trade ruling in Oregon v. United States (consolidated with Burlap and Barrel v. United States) struck down the Section 122 proclamation. The Federal Circuit issued an administrative stay on May 12 2026, so CBP is still collecting the duty pending appeal. Importers paying now should preserve protest rights and refund claims in case the government loses on the merits. The underlying Section 122 authority sunsets July 24 2026 under the statutory 150-day ceiling, regardless of the appeal outcome, unless Congress extends or a fresh proclamation restarts the clock.

Citations

• USMCA Annex 4-B Appendix (Provisions Related to the Product-Specific Rules of Origin for Automotive Goods): https://ustr.gov/sites/default/files/files/agreements/FTA/USMCA/Text/04_Rules_of_Origin.pdf
• USMCA RVC computation, Article 4.5: USMCA text Chapter 4
• CBP USMCA implementation guidance: https://www.cbp.gov/trade/priority-issues/trade-agreements/free-trade-agreements/USMCA
• 19 CFR 182 (USMCA regulations): https://www.ecfr.gov/current/title-19/chapter-I/part-182