Section 232 Tariffs

Additional US tariffs imposed under Section 232 of the Trade Expansion Act of 1962 on imports the President determines to threaten US national security. Currently active on steel and aluminum (50%), copper, imported autos and covered auto parts, medium and heavy trucks, and wood products. Stack on top of MFN duty.

Section 232 tariffs are additional US import duties imposed when the President, advised by the Department of Commerce, finds that imports of a product threaten US national security. The legal basis is Section 232 of the Trade Expansion Act of 1962. Unlike Section 301 (which is China-specific and tied to intellectual-property findings), Section 232 applies by product category to imports from virtually any origin.

Active Section 232 measures in 2026. Steel and aluminum (50% since June 2025, 25% for the UK), copper (50%), passenger vehicles and light trucks and covered auto parts (25%), medium and heavy trucks (25%) and buses (10%) since November 2025, and timber and wood products. Derivative products pay on their steel, aluminum or copper content.

How Section 232 stacks. Section 232 is layered on top of the MFN duty rate listed in the HTS for the product. For Chinese-origin steel, the order is: MFN duty + Section 301 (List 3, 25%) + Section 232 (50%) + any anti-dumping/countervailing duty. The combined burden on a single Chinese-origin steel SKU can exceed 75% of customs value before fees.

Country arrangements. The EU, Japan and South Korea pay 15% all-in on vehicles and parts under their 2025 arrangements, UK cars within a quota pay 10%, and UK steel and aluminum pay 25%. Canada and Mexico lost their steel and aluminum exemption in March 2025; USMCA-qualifying vehicles pay only on non-US content.

Verifying current scope. The official source is the proclamation published in the Federal Register and the corresponding Commerce/USTR product list. Dutiable's Section 232 lookup tool surfaces the current scope and effective rate by HS code.

Also searched: section 232 · 232 tariffs · national security tariff · steel section 232 · aluminum section 232 · auto section 232

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