Section 301 vs IEEPA/Reciprocal Tariffs: What’s the Difference

Section 301 is China-specific and product-specific: it targets listed HTS codes from China. IEEPA / reciprocal tariffs are broader: they are imposed under emergency economic powers and can sweep across many products and sometimes many countries. Both stack on top of your base MFN duty, but they are administered separately and reported with different Chapter 99 subheadings at entry.

Section 301 derives from the Trade Act of 1974, following a USTR investigation into China’s trade practices. The additional duties are organized into lists (tranches), each with its own rate. Whether 301 applies to you depends entirely on your 10-digit HTS code being on a covered list — so two seemingly similar products can face very different 301 treatment.

Because it is list-based, 301 also has an exclusion process: specific products have been excluded (and re-included) over time, which is another reason to check current status rather than assume.

IEEPA-based tariffs are declared under a declared national emergency and have been used for broad “reciprocal” measures applied across large groups of imports. They can change on very short notice, which makes them the hardest layer to plan around. The practical implication: treat any IEEPA rate you look up as a snapshot, not a permanent figure.

For a China-origin product, the math is usually: base MFN duty + any applicable Section 301 + any applicable IEEPA/reciprocal + any Section 232 (if materials qualify) + MPF/HMF fees. They are additive, which is why a “low base rate” product can still face a high total if multiple programs apply.

Start from your exact 10-digit HTS code (see our HTS code guide). Then verify current coverage on the official USITC HTS and the USTR/CBP channels, because both lists are revised. Our China Tariff Calculator lets you enter each applicable rate separately so you can model a stack without guessing whether one program “includes” another.

Build your estimates with every plausible layer included, then update them right before each shipment. The base rate is stable; the additional-tariff layers are not. A plan that ignores them is the most common way importers lose margin.