What Is Section 301? Understanding US Tariffs on Chinese Imports

Section 301 tariffs are additional customs duties imposed on imports from China under Section 301 of the Trade Act of 1974. These tariffs are layered on top of the standard MFN duty rate, meaning a product with a 5% MFN rate and a 25% Section 301 tariff carries an effective duty rate of 30%. Introduced in 2018 by the Trump administration and maintained with modifications by subsequent administrations, Section 301 tariffs now cover approximately $370 billion worth of Chinese imports — roughly 66% of all goods the US imports from China. The stated purpose is to address China's practices related to technology transfer, intellectual property theft, and innovation.

Current Section 301 Tariff Rates (2026)

Section 301 tariffs are organized into four original lists plus a restructured set of strategic sector rates:

• List 1 ($34B) — 25% tariff on 818 product lines including industrial machinery, electronics components, and medical devices.
• List 2 ($16B) — 25% tariff on 279 product lines including semiconductors, chemicals, motorcycles, and railway equipment.
• List 3 ($200B) — 25% tariff on approximately 5,745 product lines covering a broad range of consumer and industrial goods.
• List 4A ($120B) — 7.5% tariff on approximately 3,900 product lines including consumer electronics, apparel, and footwear.
• Strategic sector increases (2024-2026) — Electric vehicles: 100%. Semiconductors: 50%. Solar cells: 50%. Steel and aluminum: 25%. EV batteries and critical minerals: 25%. Ship-to-shore cranes: 25%. Medical gloves, syringes, PPE: 25-50%.

How Section 301 Works Legally

Section 301 of the Trade Act of 1974 authorizes the US Trade Representative (USTR) to investigate and take action against foreign trade practices that are "unreasonable, unjustifiable, or discriminatory" and burden US commerce. The process involves: (1) USTR initiates an investigation or responds to a petition. (2) USTR conducts an investigation, typically lasting 6-12 months. (3) If violations are found, USTR proposes tariff actions and holds a public comment period. (4) The President approves the final tariff list. (5) Tariffs are implemented and collected by CBP on top of existing duty rates. The WTO has ruled that US Section 301 tariffs on China violate international trade rules, but the US has effectively blocked enforcement of the ruling by blocking appointments to the WTO Appellate Body.

Section 301 Exclusions

USTR periodically grants product-specific exclusions that temporarily remove certain items from Section 301 tariffs. Exclusions are granted when: (1) the product is only available from China, (2) the tariff causes severe economic harm to the petitioner, or (3) the product is not strategically significant. Exclusions are typically granted for 12 months and can be extended. Granted exclusions are retroactive — importers can file for a refund of Section 301 duties paid during the exclusion period. As of 2026, most exclusions have expired and the exclusion process has become increasingly restrictive.

Strategies to Reduce Section 301 Exposure

• Supply chain diversification — Source from countries not subject to Section 301 tariffs. Vietnam, India, Thailand, and Mexico are the most common alternatives.
• Nearshoring to Mexico — Manufacture in Mexico and qualify for USMCA duty-free treatment. This eliminates both MFN duties and Section 301 tariffs.
• Foreign Trade Zones (FTZ) — While FTZ designation doesn't eliminate Section 301 tariffs for goods entering US commerce, it provides duty deferral and inverted tariff benefits for manufacturers.
• Duty drawback — If you import from China and export products, you can recover up to 99% of all duties paid, including Section 301 tariffs.
• Tariff engineering — Redesign products or source components differently to shift to a non-covered HTS code. This requires careful classification analysis.
• First Sale valuation — If your supply chain involves a middleman, you may be able to declare the "first sale" (manufacturer to middleman) as the customs value instead of the higher price you paid, reducing the duty base.
• Monitor exclusion opportunities — Track Federal Register notices for new exclusion processes and submit petitions when your products qualify.

Common Compliance Pitfalls

• Transshipment fraud — Routing Chinese goods through Vietnam, Malaysia, or other countries without substantial transformation does not change the country of origin. CBP is aggressively investigating and penalizing this practice.
• Incorrect classification to avoid tariffs — Deliberately misclassifying goods to a non-covered HTS code is fraud. CBP uses AI-assisted data analysis to detect anomalies.
• Undervaluation — Declaring a lower customs value to reduce the duty amount is illegal and subject to severe penalties including seizure.
• Ignoring Section 301 changes — Rates and covered products change periodically. Failing to track these changes leads to underpayment or overpayment.

How Camtom Helps with Section 301 Management

Camtom's AI platform automatically identifies whether a product is subject to Section 301 tariffs based on its HTS classification and country of origin. Our engine calculates the total duty impact — MFN rate plus Section 301, 232, and any AD/CVD orders — giving you the true landed cost before goods ship. For companies exploring supply chain diversification, our platform compares the total duty cost of sourcing from China vs. alternative countries, including USMCA-qualifying Mexican production. This intelligence is essential for making informed sourcing decisions in the current trade environment.

Want to understand your Section 301 exposure? Try Camtom's free tariff lookup to see the total duty rate for your products, or schedule a demo to explore supply chain optimization strategies with our team.