Section 301 of the Trade Act of 1974 authorizes additional duties on imports from countries with unfair trade practices. Today, it's how the US levies extra tariffs on listed goods from China.
Passed in 1974, Section 301 lets the USTR impose tariffs when a trading partner violates trade agreements. Since 2018, it's been used to tariff four lists of China-origin goods (List 1, 2, 3, 4A) at rates from 7.5% to 25% with new rates up to 100% on strategic products.
Over 10,000 HTS codes are listed. Electronics, machinery, furniture, apparel, EVs, solar cells, medical devices, steel, aluminum. If it ships from China, assume 301 applies until you've checked the list.
The USTR publishes periodic exclusions narrowly-written carve-outs identified by HTS subheading and product description. InstaDuty auto-checks active exclusions against each line item and flags eligibility.
Every invoice line is cross-referenced against the live 301 list, the current exclusion list, and the origin country. If 301 applies, it's added transparently to the landed cost with the exact list and rate shown.
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