All rate data is sourced from official U.S. government publications. Secondary and news sources are used for context only — never for rate calculations.
Office of the U.S. Trade Representative
Section 301 tariff lists, exclusion processes, and China-specific actions.
National Archives
All proposed and final tariff-related rules, proclamations, and Federal Register notices.
U.S. International Trade Commission
The official HTS code lookup with base MFN duty rates for every product classification.
U.S. Customs and Border Protection
Entry procedures, binding rulings, and country of origin guidance from CBP.
Federal Register
Presidential proclamations that create, modify, or suspend tariff programs.
Dept. of Commerce
Section 232 national security tariff investigations and proclamation tracker.
Estimate only. Confirm all duty rates with your licensed customs broker before filing entry.