Section 301 Tariffs on Chinese Imports: 2026 Compliance Guide for US Importers

Section 301: The Tariff That Changed Global Trade

Section 301 of the Trade Act of 1974 authorizes the United States Trade Representative (USTR) to impose tariffs on foreign goods in response to unfair trade practices. Since 2018, Section 301 tariffs on Chinese imports have covered approximately $370 billion worth of goods across four Lists (1, 2, 3, and 4A), with duty rates ranging from 7.5% to 100% depending on the product category and List assignment.

As of 2026, these tariffs remain in effect for the vast majority of covered products. Understanding whether your goods fall under Section 301, at what rate, and whether any exclusion or exemption applies is not optional for US importers — it is a fundamental compliance requirement with penalties for non-compliance reaching 20% of the underpaid duty plus interest.

Section 301 Coverage by List (2026 Status)

How to Determine If Your Product Is Subject to Section 301

1. Identify the correct 10-digit HTSUS code for your product. This is the fundamental step. An incorrect HTS classification can cause you to miss Section 301 applicability entirely — or apply it where it does not belong. Use our HTS Tariff Database to search for your product's correct classification.
2. Check whether the HTS code appears in the relevant List annex. The USTR publishes official annexes listing every HTS subheading subject to Section 301. These are available at USTR.gov. Each List has its own annex. Your customs broker should perform this check as a standard part of entry preparation — but the legal responsibility for correct classification and duty payment rests with the importer of record, not the broker.
3. Determine the country of origin. Section 301 applies to products of China. If your product is manufactured in China but undergoes substantial transformation in a third country, it may no longer be considered a product of China for Section 301 purposes. The substantial transformation test is complex and fact-specific — engage a trade attorney for borderline cases.
4. Apply the correct duty rate. The Section 301 duty is additional — it stacks on top of the normal MFN (Most Favored Nation) duty rate. If your product has an MFN rate of 3% and is subject to List 3 (25%), your total duty rate is 28%. This is calculated on the entered value (transaction value of the merchandise).

The Exclusion Process

The USTR periodically opens exclusion request windows for specific product categories. Exclusions are product-specific, not importer-specific — if a particular HTS subheading receives an exclusion, all importers benefit. Exclusion requests must demonstrate that: (a) the product is not available from sources outside China, (b) the tariff causes severe economic harm to the US requesting party, and (c) the product is not strategically important under "Made in China 2025" or similar industrial policy programs. Exclusion requests are public — your competitors can see what you are requesting and why. Consult trade counsel before filing.

Retroactive Relief: What If You Overpaid?

If you paid Section 301 duties on a product that should have been excluded, you may be entitled to a refund. File a Post-Summary Correction (PSC) or Protest (CBP Form 19) within 180 days of the date of liquidation. For exclusion-based refunds where the exclusion was granted after your entry was liquidated, the timeline may be extended — consult with a customs attorney on the specific facts of your case. Do not assume it is too late. Many importers leave significant refunds unclaimed because they did not know the exclusion was retroactive.

CBP Enforcement Trends for 2026

US Customs and Border Protection has signaled three enforcement priorities for 2026 that directly affect Section 301 compliance: (a) country of origin verification for transshipment through third countries — CBP is increasing physical inspections of goods routed through Vietnam, Malaysia, and Mexico where Chinese origin is suspected but not declared, (b) HTS misclassification audits focusing on consumer electronics, machinery parts, and textile articles where importers have historically misclassified products to avoid List 3 applicability, and (c) antidumping/countervailing duty crossover — products subject to both Section 301 duties and AD/CVD orders face cumulative duty rates that can exceed 200%. These are enforcement priorities, not theoretical risks.

Practical Steps for Importers

1. Audit your HTS classifications now. Do not wait for a CBP audit. Review every HTS code you use for products from China. Verify each classification against the current HTSUS and the USTR List annexes.
2. Document your country of origin determinations. For any product where substantial transformation is claimed, maintain written documentation of the analysis — the manufacturing steps performed in each country, the change in name/character/use, and the value added in each location. If CBP challenges your origin determination, this documentation is your defense.
3. Track exclusion windows. Subscribe to USTR email alerts and monitor trade publications. When an exclusion window opens for your product category, file promptly. Exclusion requests are time-limited — a missed window may not reopen.
4. Review your customs broker's work. Your broker files entries on your behalf, but you are legally responsible for their accuracy. Periodically pull entry summaries for Section 301-covered products and verify the HTS classification, duty rate, and origin declaration. Brokers make mistakes. The importer pays for them.

Disclaimer: This guide provides general trade compliance information. It does not constitute legal advice, customs brokerage services, or trade consulting. Importers should consult qualified customs attorneys and licensed customs brokers for guidance on their specific import operations. PoliteDraft does not provide customs brokerage or legal services.