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Section 301Under investigationPublished March 10, 2026

USTR Initiates Section 301 Investigations Into Structural Excess Manufacturing Capacity Across 16 Economies

USTR launched Section 301 investigations into 16 economies over structural excess capacity in sectors including steel, aluminum, autos, batteries, semiconductors, chemicals, and electronics.

Authority
Section 301
Status
Under investigation
Effective
Comments due April 15, 2026; hearings May 5 to 8, 2026
Rate
No statutory cap on Section 301 rates

What this affects

Countries
ChinaEuropean UnionJapanMexicoVietnamIndiaSouth KoreaTaiwanSingaporeSwitzerlandNorwayIndonesiaMalaysiaCambodiaThailandBangladesh
Product categories
SteelAluminumAutosBatteriesSemiconductorsChemicalsElectronics

The update

USTR launched Section 301 investigations into China, the EU, Japan, Mexico, Vietnam, India, Korea, Taiwan, Singapore, Switzerland, Norway, Indonesia, Malaysia, Cambodia, Thailand, and Bangladesh over structural excess capacity in manufacturing sectors including steel, aluminum, autos, batteries, semiconductors, chemicals, and electronics.

Impact

These investigations are widely viewed as the legal pathway to reimpose tariffs at or near pre-SCOTUS levels once the temporary Section 122 surcharge expires on July 24. Section 301 tariffs have no rate cap and no built-in expiration.

What to watch

These investigations are widely viewed as the pathway to reimpose tariffs once the temporary Section 122 surcharge lapses. Section 301 tariffs have no rate cap and no built-in expiration.

How to prepare

  1. 1
    Check whether your origin country is on the list

    Sixteen economies covers most of the alternatives a China plus one plan would consider.

  2. 2
    Map your SKUs to the named sectors

    Sector coverage is where the product lists will come from.

  3. 3
    Model a higher rate on the affected lines

    Section 301 has no rate ceiling and no automatic expiry.

  4. 4
    Get origin evidence ready per SKU

    Any relief or exclusion argument later starts with provable origin.