China Section 301 List 3 (Modification) (25% additional duty)

This is a U.S. trade measure under Section 301, a law that allows additional duties or other actions in response to certain foreign trade practices. “List 3” identifies a group of products covered by the measure, while “Modification” indicates that the covered product list or treatment has been changed. The parenthetical duty description signals an additional duty that may apply on top of the product’s ordinary customs duty; confirm the currently applicable treatment in official tariff data.

The measure typically affects products that are classified under specified Harmonized Tariff Schedule of the United States (HTSUS) subheadings and entered for consumption from China, subject to the measure’s scope and any exclusions or special rules. It matters because the importer of record may owe the additional duty, and an incorrect HTSUS classification, country-of-origin analysis, or claim of an exclusion can lead to underpayment, delays, or compliance exposure. Classification and applicability questions may require a customs broker or trade attorney’s review.

What to check

• Confirm the product’s HTSUS classification using its material, function, and essential characteristics; do not rely only on a supplier’s code.
• Check the measure’s current product coverage and whether the exact HTSUS subheading is included after any modification.
• Verify the product’s country of origin under U.S. marking and substantial-transformation rules; shipping from another country does not automatically change origin.
• Check official guidance for exclusions, exclusions’ scope, entry requirements, and any applicable expiration or reinstatement information.
• Confirm how the additional duty is reported and calculated with current CBP instructions or a qualified customs professional.