Supplier HS Code Validator

How the 6, 8, and 10-digit codes relate

The international Harmonized System maintained by the World Customs Organization is a 6-digit framework — 21 sections, 99 chapters, and roughly 5,300 subheadings. Every WCO member country uses the same first 6 digits for any given product. Countries then add their own national subdivisions to differentiate products for tariff and statistical purposes.

China extends the international code to 8 digits in its national tariff schedule (the China Customs Commodity Code). The United States extends it to 10 digits in the Harmonized Tariff Schedule of the United States (HTSUS). The first 6 digits are interchangeable: a Chinese HS 8471.30 is also a US HTS subheading 8471.30. Beyond digit 6, the schedules diverge. A single Chinese 8-digit code can correspond to several US 10-digit codes, each with a different duty rate.

This is the source of the most common entry mistake: an importer copies the supplier's 8-digit code straight onto a CBP entry. The entry is rejected, or it's accepted at the wrong duty rate, and the error compounds across every shipment until CBP issues a CF-28 or CF-29.

Worked example: Chinese HS 8471.30 → US HTS

A Chinese supplier ships portable digital data processing machines under HS 8471.30. The international 6-digit subheading is “portable automatic data processing machines, weighing not more than 10 kg, consisting of at least a central processing unit, a keyboard, and a display.” In the US HTSUS, that same 6-digit subheading expands into multiple 10-digit codes depending on the exact device type: laptop computers, tablet computers, certain handheld devices, and so on. The duty rates and Section 301 status differ.

The validator at the top of this page runs the prefix search for you and shows every matching US 10-digit code with its base duty rate, Section 301 list (if applicable), and IEEPA / AD-CVD overlay. The right choice depends on the actual product specification — weight, exact device class, function. Compare each description against your commercial invoice and product spec before filing.

When the converter returns several matches

It is normal for a 6 or 8-digit input to return 3–10 matching US codes. Several strategies narrow the field:

• Read the chapter and section notes. The HTSUS chapter notes contain legal definitions that exclude or include specific items. A note can shift a borderline product from one subheading to another.
• Apply GRI 3 if more than one subheading is plausible. The General Rules of Interpretation prefer the more specific description (GRI 3(a)), then the essential character of a composite article (GRI 3(b)), and finally the heading that appears last in numerical order (GRI 3(c)).
• Check the rate disparity. If the candidate codes have similar duty rates, the practical risk is low; if one is free and another is 15%, choosing wrong is expensive — verify with care or request a binding ruling.
• Search CROSS for prior rulings.CBP's Customs Rulings Online Search System contains binding rulings on tens of thousands of products. A ruling on a similar article is strong persuasive authority.

When the converter is not enough

Two situations require more than a prefix lookup. First, when the product doesn't cleanly fit the international 6-digit subheading the supplier used — this is common for assembled goods, multi-function devices, kits, and items that combine materials. In those cases the supplier's code may itself be wrong, and you need a full classification rather than a conversion. Use the AI classifier for those products.

Second, when the duty difference between candidate US codes is large and the shipment volume is meaningful, a CBP binding ruling under 19 CFR Part 177 provides legal certainty. CBP typically issues a New York ruling within 30 days and binds itself prospectively. The ruling is your strongest defense if CBP later challenges the classification on a CF-28 or audit.

Country of origin still matters

Converting a Chinese HS code to a US HTS code does not change the country of origin. Even when the US HTS code is correctly identified, the goods remain Chinese-origin and continue to be subject to Section 301 tariffs (List 1–4A rates) plus the IEEPA country tariff on top of the base HTS rate. The duty stack is what most importers underestimate, not the base rate alone. Use the country selector above to apply the overlay flags to your specific origin.