Complete guide to USMCA (CUSMA/T-MEC) rules of origin for electronic components and semiconductors. When do electronics qualify for 0% duty? Regional Value Content thresholds, tariff shift rules, and practical examples for procurement teams.
The United States-Mexico-Canada Agreement (USMCA), which replaced NAFTA in July 2020, allows qualifying goods manufactured within the US, Mexico, and Canada to enter any of the three countries at 0% duty. For electronics procurement, this is enormously significant: a $100,000 BOM sourced from Mexico and qualifying under USMCA pays zero import duty — versus 35% from China or 10% from Taiwan/Malaysia. The 2026 tariff environment has made USMCA qualification more valuable than ever, with Section 122 surcharges (10%) and Section 301 tariffs (up to 25%) adding substantial cost to non-USMCA imports.
Not all electronics made in Mexico automatically qualify. USMCA uses two primary tests: (1) the Tariff Classification Change (TCC) rule, also called the tariff shift rule, and (2) the Regional Value Content (RVC) test. For most electronics covered under HTS Chapter 85 (Electrical machinery and apparatus), the default rule requires a change in tariff heading (4-digit level), with an RVC of at least 35% under the Net Cost method or 45% under the Transaction Value method. In practice, this means the finished product must incorporate a sufficient amount of North American content to count as 'made in North America.' An iPhone assembled in Mexico from all Chinese components would likely NOT qualify. A PCB assembly using US-sourced chips and Mexico-assembled boards likely WOULD qualify.
Regional Value Content is calculated as (Net Cost − Non-Originating Materials) ÷ Net Cost × 100. For Chapter 85 electronics, USMCA requires a minimum 35% RVC under the Net Cost method. This means at least 35% of the manufacturing cost must come from North American content (US + Mexico + Canada). Labor costs, manufacturing overhead, and shipping within the USMCA region count toward RVC. Components sourced from Taiwan, South Korea, Japan, or China do NOT count. For high-component-count products like microcontroller boards, reaching 35% North American RVC often requires sourcing key ICs from US distributors (which adds an originating-content argument) or manufacturing with significant North American value-added.
The tariff shift rule provides an alternative path to USMCA qualification without calculating RVC. For many electronics, the rule requires a change from any other chapter (except specific exceptions) to Chapter 85 heading. This is achievable when electronics manufacturing in Mexico involves transforming sub-assemblies or materials from a different tariff classification into a finished electronic product. For example: raw PCB laminates (HTS Chapter 39 plastics) assembled into a populated PCB (HTS Chapter 85) represents a tariff shift and may qualify. Always work with a licensed customs broker to confirm tariff shift eligibility for your specific product.
To claim USMCA preference, the importer must maintain a Certificate of Origin and supporting documentation for a minimum of 5 years. The exporter or producer must complete the USMCA Certification of Origin (there is no standard CBP form — any document with the required 9 data elements is acceptable). Your Mexico EMS provider or contract manufacturer must be able to provide this certification with each shipment. CBP may audit USMCA claims and request underlying cost data to verify RVC calculations. Incorrect USMCA claims can result in penalty duties, back-duty assessment, and potential fraud charges.
The 10% Section 122 global surcharge (currently in effect for all electronics imports) includes FTA exemption language. USMCA-qualifying goods are generally exempt from the Section 122 surcharge based on the free trade agreement carve-out in the executive order. However, this exemption is product-specific and depends on whether the goods qualify under USMCA Chapter 85 rules. Consult with a licensed customs broker to confirm Section 122 exemption status for your specific USMCA imports. If confirmed, this means qualifying Mexico electronics face 0% total effective duty — a 35-point advantage over China.
| Source / Scenario | Rate | Notes |
|---|---|---|
| Mexico (USMCA-qualifying) | 0% | Both MFN and Section 122 exempt |
| Mexico (non-USMCA) | 10% | Section 122 only |
| Taiwan / Malaysia / South Korea | 10% | Section 122 only |
| China (semiconductors 8541/8542) | 60% | Section 301 (50%) + Section 122 (10%) |
| United States (domestic) | 0% | No import duty on domestic goods |
No. Simple assembly of foreign components in Mexico does not automatically qualify for USMCA. The goods must meet either the tariff shift rule or the Regional Value Content threshold for their specific HTS code. Work with a customs broker to evaluate your product.
No. Only materials originating in the US, Mexico, or Canada (the USMCA territory) count toward RVC. Materials sourced from China, Taiwan, South Korea, or any other non-USMCA country do not count.
USMCA allows blanket certifications covering multiple shipments within a 12-month period. The certification must be on file with the importer and available to CBP upon request. You do not need to present the certificate at entry but must maintain it.
CBP may request the underlying cost records supporting the RVC calculation or tariff shift analysis. If the goods are found not to qualify, CBP will assess the normal duty rate (+ interest) retroactively. Intentional false USMCA claims can result in significant civil penalties.
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