For Canadian products entered on or after October 30, 2026, 22 listed HTSUS classifications are removed from the 50% Section 338 duty under 9903.03.14, and 100 additional classifications become subject to it.

A Section 338 measure is a U.S. trade action that can impose additional duties on imported goods from a named country. The measure works through HTSUS (Harmonized Tariff Schedule of the United States) classifications and may change which tariff lines receive an additional duty, including exclusions and newly covered classifications. It typically affects importers, customs brokers, and businesses bringing covered merchandise into the United States.

For an importer, the key issue is whether the product’s correct HTSUS classification and country of origin match the scope of the measure. The additional duty is generally applied on top of the ordinary customs duty and other applicable trade measures, so a classification change can affect landed cost, entry filing, and compliance. Confirming the result may require customs-broker or trade-counsel review, especially when the product has multiple components or a complicated origin.

What to check

• Confirm the product’s complete HTSUS classification, including any applicable Chapter 99 reporting number, using the official tariff text.
• Check the measure’s scope to see whether the classification was removed, added, or remains covered, and verify the measure’s entry-date rule.
• Determine the product’s country of origin under U.S. customs rules; the shipping country is not always the origin country.
• Review whether other exclusions, special programs, quotas, or additional duties also apply to the same entry.
• Ask a licensed customs broker or qualified trade professional to review uncertain classifications, origin analyses, and entry declarations.