Reviewed by Sasha Božič, Licensed Customs Broker

To find the HTS code for a product, describe the product precisely, search the Harmonized Tariff Schedule published by the U.S. International Trade Commission, work down from heading to 10-digit number using the General Rules of Interpretation, and check CBP rulings on similar products. The first six digits are shared internationally. The last four are specific to the U.S.
Write down what it is, what it is made of, how it works, what it is used for and whether it is a part, a complete article or a set. Most classification mistakes start with a vague description.
Search the HTS at hts.usitc.gov by product terms, then read the section and chapter notes for the headings that come up. Notes often include or exclude products explicitly.
Search CBP's CROSS database for rulings on similar products. Rulings show how CBP has applied the rules.
At the 10-digit level, read the general rate, any special rates for trade programs, and any Chapter 99 duties tied to that number. See HTS Chapter 99.
Is the HTS code the same as Schedule B? No. Schedule B numbers are used for exports. The first six digits usually line up.
Can I use my supplier's code? Treat it as a starting point. Foreign codes often match at six digits and not at ten.
What if it is still unclear? Request a binding ruling.
Caspian reviews your catalog classifications against the schedule and rulings. See HTS classification services and common classification errors.
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