How classification is decided
The Harmonized Tariff Schedule of the United States is maintained by the US International Trade Commission, and CBP applies it at entry. Classification follows the General Rules of Interpretation in order, starting with the wording of the headings and the legal notes to each section and chapter, and only then moving to the more specific subheadings. International explanatory notes are not binding in the United States but are often consulted for guidance. The answer depends on what the product actually is and sometimes on how it is principally used, so two products that look alike can classify differently. A supplier's code from another country may share only the first digits with the US number, and marketing names do not control the answer.
Why a classification change costs more than duty
A different classification can change the general duty rate and also whether additional tariffs tied to trade actions apply. Those programs have changed repeatedly; tariffs imposed under emergency-powers authority were held invalid by the Supreme Court in early 2026, and the refund process is still developing, so current status should be checked. Classification can also determine whether goods need approval from another agency, although antidumping and countervailing duty orders are defined by their written scope rather than by tariff number. If CBP believes past entries were misclassified, it may seek unpaid duties, and penalties depend on how careful the importer was.
Rulings, protests, and the record
A binding ruling request lets CBP decide the classification of a specific product before you import it, and existing rulings on similar goods are publicly searchable. If CBP changes a classification at liquidation, a protest can be filed within a limited window, and a denied protest can be taken to the Court of International Trade. Gather product specifications, samples or photos, a breakdown of materials and function, past entries and rulings you relied on, and your broker instructions. Comparing your product with the headings in play tells us whether a ruling, a protest, a correction of past entries, or no action is the sensible step.
