In short: Every product you import needs a Harmonized Tariff Schedule (HTS) code before it can legally enter the United States. The first 6 digits are internationally standardised; the US adds 2-4 more digits (the full HTSUS code) that set your exact duty rate. Classify incorrectly and you risk overpaying duty, underpaying duty (which brings penalties and back-payment demands), or triggering a CBP hold while the shipment is reclassified. The safest approach is to classify before you order production, not after the goods arrive at port.

Last updated: July 31, 2026

What is an HS code, and why does it matter for importing from China?

An HS code is a standardised numerical classification used by customs authorities worldwide to identify traded products. The World Customs Organization maintains the first 6 digits, which are the same in almost every country. Individual countries — including the US — extend this with additional digits for their own tariff schedule. In the US, this full code is called the HTSUS (Harmonized Tariff Schedule of the United States), and it typically runs to 10 digits.

Your HS/HTS code determines three things: the duty rate you'll pay, whether your product needs additional permits (FDA, CPSC, FCC, USDA, depending on category), and how CBP risk-screens your shipment.

How do I find the right HS code for my product?

Start with a product description that matches how customs thinks, not how you market it. "Silicone kitchen spatula" classifies differently than "silicone baby feeding spoon," even though they're similar materials. Search the HTSUS directly via the US International Trade Commission's tariff database, using material composition and primary function as your search terms. Check the General Rules of Interpretation (GRI) when a product could fit more than one heading — classification follows a strict hierarchy (essential character, most specific description, then the heading that appears last numerically). Cross-check against your supplier's export documentation — Chinese factories often list an HS code on their commercial invoice, but treat this as a starting point, not a guarantee, since export-side codes don't always match US import classification. Get a binding ruling from CBP if you're unsure and the duty difference is material — CBP will issue a written ruling you can rely on for that exact product going forward.

Worked example: classifying a silicone kitchen tool

The key lesson: classification follows the material and function that gives the product its essential character, not the most visible or most marketed material.

What happens if I classify a product incorrectly?

Three outcomes are common. First, you could overpay duty for years without realising it, because nobody at your business is checking. Second, you could underpay, which CBP can identify in an audit — leading to back-duty demands plus penalties. Third, and most disruptive, your shipment can be held at port for reclassification, which delays delivery and adds storage fees. First-time importers usually discover a classification problem only when a shipment gets flagged, which is the most expensive time to find out.

Do I need a customs broker to classify my products?

You're not legally required to use one, but most first-time importers do, because misclassification risk outweighs the broker fee. A licensed customs broker (or a sourcing partner with in-house compliance support) can classify your product correctly before you place a production order, so the duty rate is known and budgeted for in advance — not discovered at the port.

Frequently asked questions

Is the HS code the same as the country of origin marking?

No. The HS code classifies what the product is for duty and compliance purposes. Country of origin marking is a separate labelling requirement showing where the product was made — both are required, and neither substitutes for the other.

Can two very similar products have different HS codes?

Yes, frequently. Small differences in material composition, function, or even packaging can shift a product into a different heading with a different duty rate — this is exactly why the "essential character" test in the worked example matters.

Where can I check current US duty rates by HTS code?

The US International Trade Commission's HTS database is the authoritative source, and it's updated periodically — always check the current version rather than relying on a code you used a year or two ago.

Does my Chinese supplier's invoice HS code count as my official classification?

No. It's a useful reference point, but the importer of record is responsible for correct US classification, regardless of what appears on the supplier's export paperwork.

What if my product could reasonably fit two different HS codes?

This is common enough that the General Rules of Interpretation exist specifically to resolve it. When the duty difference is significant, requesting a binding ruling from CBP removes the ambiguity for future shipments of the same product.

How Epic Sourcing helps

Classification is one of the quieter risks in importing from China — easy to get wrong, expensive to get wrong for long enough. Epic Sourcing's bilingual teams on the ground in China and Vietnam work classification into the sourcing process from the start, so your landed cost estimate reflects the right duty rate before you commit to production. See our related guide on Import Duties & Taxes: China to South Africa and our blog on How to Read a Chinese Factory Quote, plus our quality control and factory audit service. Get in touch to have your next product's classification reviewed — no pressure, no obligation.