Section 232 National Security Tariffs

Section 232 of the Trade Expansion Act of 1962 allows the US to impose tariffs or quotas on imports that threaten national security. These measures are implemented in the HTS under Chapter 99 and currently cover steel, aluminum, and copper articles and their derivatives, semiconductors, and automobiles, with rates that vary by country of origin.

Base HTS rates apply first; Section 232 adds additional duties where applicable. Use our tariff calculator or GET /api/v1/tariffs/resolve with hts and origin to get base tariffs and applicable Section 232 measures.