U.S. Section 301 duty: what Vietnam exporters must check before shipping

Vietnam exporters and U.S. importers should recalculate landed cost before confirming a United States-bound shipment. The U.S. Trade Representative's final Section 301 action imposes an additional 12.5% duty on products of Vietnam, except products covered by the notice's exemptions. The measure applies to goods entered for consumption, or withdrawn from warehouse for consumption, from 12:01 a.m. U.S. Eastern time on 24 July 2026.

This is commercially significant because the United States was Vietnam's largest export market in the first half of 2026, with USD 86.5 billion of exports according to Vietnam's Ministry of Industry and Trade. It is not, however, a 12.5% charge on every container loaded in Vietnam.

What the official action covers

USTR applied the 12.5% rate to products of Vietnam but excluded the categories and tariff lines identified in its final notice and annexes. General exemptions include informational materials, donations, accompanied baggage and articles or parts already subject to Section 232 tariffs. Product-specific exemptions are listed by U.S. Harmonized Tariff Schedule provisions.

Vietnam's Ministry of Industry and Trade estimates that, after U.S. exemptions, the measure covers about 37% of the current value of Vietnam's exports to the United States. That figure is an aggregate estimate, not a test for an individual shipment. The applicable result still depends on the product's U.S. tariff classification, country of origin, entry date and the exact exemption language.

The short transit exception in the USTR notice covered qualifying goods loaded before the measure began and entered before 12:01 a.m. Eastern time on 28 July. That window has now closed. Current bookings should therefore be costed under the operative rules, not the expired transition.

Five checks before cargo handover

• Ask the U.S. importer or customs broker to confirm the final 10-digit HTSUS code, the applicable Chapter 99 line and any exemption in writing for the exact product.
• Confirm country of origin separately from port of loading. Consolidation, transshipment or final assembly in Vietnam does not by itself settle U.S. origin.
• Build a lot-level traceability file linking the bill of materials, suppliers, production sites, purchase records and transport documents to the finished goods.
• Separate ocean freight and carrier surcharges from import duty in the quotation. The Section 301 duty is a border measure, not a carrier freight surcharge.
• Confirm in the sales contract who bears unexpected duty and clearance costs, then save the broker calculation and the version of the official notice used for the booking.

Why traceability now belongs in the shipment file

Vietnam's Ministry of Industry and Trade advises exporters to map direct and deeper-tier suppliers, retain records for raw materials and components, classify supplier risk and prepare a rapid-response verification file. It notes that exposure can arise from an input or an intermediate production step, not only at the final factory.

That recommendation matters operationally. Commercial invoice, packing list and bill of lading remain necessary, but they may not connect the finished product to upstream inputs. For textiles, the file may need to reach cotton, fibre, yarn, fabric, dye and trims; for electronics or energy products, it may need to cover components, semiconductors, batteries, photovoltaic materials and minerals.

Concrete impact on Vietnam freight

The immediate freight impact is on quotation quality, document readiness and release planning. A DDP or landed-cost offer that omits an applicable 12.5% duty can create a large commercial dispute even when the ocean freight is correct. Missing or inconsistent upstream records can also slow a response if the importer or U.S. authority asks for verification.

No official source used here predicts a uniform freight-rate increase or delay for every Vietnam–U.S. shipment. The duty outcome is shipment-specific, and the USTR action can be modified. Exporters should use a licensed U.S. customs broker or trade counsel for classification and entry decisions.

Vietnam issued Decree 292/2026/ND-CP on 22 July 2026, adding a prohibition on imports of goods produced wholly or partly through forced labor. Its official effective date is 5 September 2026, so it was issued but not yet effective on this article's date. Vietnam's Ministry of Industry and Trade says it will continue engaging U.S. authorities so that Vietnam's legal and enforcement progress is reflected in future tariff treatment.

Confidence is high for the 12.5% rate, effective date, exemptions framework and Vietnam decree dates because they come from official U.S. and Vietnamese texts. Confidence is medium for shipment-level exposure until the importer or broker confirms the exact HTSUS classification, origin and exemption status.