Economy March 23, 2026

Thailand Given April 15 Deadline to Respond to U.S. Section 301 Inquiry

Commerce ministry warns failure to file written comments could lead to U.S. tariff action affecting several export sectors

By Avery Klein
Thailand Given April 15 Deadline to Respond to U.S. Section 301 Inquiry

Thailand has been instructed to submit written comments to the United States by April 15 in response to a Section 301 trade probe, the country's commerce ministry said. Officials warned that failure to mount a defence could leave Thai exports subject to U.S. tariffs. The probe targets alleged excess production capacity across a range of sectors and includes a separate inquiry into imports tied to forced labour, with no specific source country named.

Key Points

  • Thailand must submit written comments to the U.S. on the Section 301 probe by April 15; failure to respond could result in a tariff - this affects export sectors and trade relations.
  • The probe covers alleged excess production capacity in autos, machinery parts, fish, fish oil, animal feed and garments - sectors tied to manufacturing and agricultural export markets.
  • A separate U.S. investigation targets imports of goods made with forced labour, but no particular source country has been named; Thailand remains in talks with the U.S. on tariff and non-tariff issues.

Thailand must furnish written comments to U.S. authorities on the Section 301 trade investigation by April 15, the Thai commerce ministry said on Monday. The ministry's remarks followed a briefing by Chotima Iemsawasdikul, director general of the Department of Trade Negotiations, who cautioned that failing to present a defence could expose the country to tariff measures.

Chotima noted that Thailand is one of 16 countries the United States has placed under investigation under Section 301 of the Trade Act of 1974. The probe scrutinises alleged excess production capacity in several Thai export sectors. Specifically, the investigation covers autos, machinery parts, fish, fish oil, animal feed and garments.

In addition to capacity-related questions, there is a separate U.S. case examining imports of goods made with forced labour. Chotima emphasised that, in that particular case, no specific source country has been identified by the investigators.

Officials said Thailand continues to engage in discussions with U.S. counterparts following an earlier joint statement addressing both tariff and non-tariff matters. Those talks remain underway as Thai negotiators seek to resolve outstanding issues.

The commerce ministry statement also recalled that Thai goods had previously been subject to a 19% U.S. tariff. That measure has since been superseded by Washington's new global tariff framework.

Separately, Chotima reported progress on regional trade negotiations, saying talks on a Thailand-European Union free-trade agreement are at the midpoint. Thailand is pressing to finalise the FTA within the current year, she said.

The U.S. inquiry and the potential for tariffs touch on a wide cross-section of Thailand's export base. The named sectors - autos, machinery parts, fish and fish oil, animal feed and garments - represent areas where trade policy outcomes could affect production, pricing and market access. Ongoing bilateral discussions with the United States and parallel negotiations with the EU will shape near-term trade dynamics for Thai exporters.


Background limitations: The ministry's announcement and Chotima's remarks provide the scope and deadlines for the U.S. reviews but do not include details on evidence, timelines for any subsequent determinations, or the identities of the other 15 countries under investigation. The forced labour inquiry is noted as having no specific source country identified in the information released.

Risks

  • If Thailand does not adequately defend its position by the April 15 deadline, U.S. tariffs could be applied - this poses direct downside risk to exporters in autos, machinery parts, fish and garments.
  • The forced labour inquiry carries uncertainty because investigators have not identified a specific source country, leaving scope and implications unclear for affected supply chains and importers.
  • Ongoing but unresolved negotiations with the United States on tariff and non-tariff measures create near-term policy uncertainty for Thai exporters and trading partners.

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