HS Code vs HTS Code: What's the Difference?

If you've ever imported goods into the United States, you've likely heard both "HS code" and "HTS code" used interchangeably. They're related, but not the same thing — and the distinction matters when you're filing with US Customs and Border Protection (CBP).

The Harmonized System (HS) — the global foundation

The Harmonized System is a standardised international nomenclature for classifying traded goods. It's maintained by the World Customs Organization (WCO) and used by more than 200 countries.

Every product gets a 6-digit HS code. The first two digits identify the chapter, the next two the heading, and the last two the subheading. For example:

- 85 = Chapter 85 (Electrical machinery) - 8518 = Heading 8518 (Microphones, loudspeakers, headphones) - 8518.30 = Subheading (Headphones and earphones)

Those first 6 digits are identical whether you're importing into Germany, Japan, or Brazil. That's the point — a common language for trade.

The HTS — the US extension

The Harmonized Tariff Schedule of the United States (HTSUS, commonly called HTS) takes the 6-digit HS code and adds 4 more digits — giving a 10-digit code unique to the US tariff schedule.

For example, wireless headphones might be: - HS code: 8518.30 (global, 6 digits) - HTS code: 8518.30.2000 (US-specific, 10 digits)

Those extra 4 digits are used to set specific duty rates, track trade statistics, and apply quota restrictions. They're maintained by the US International Trade Commission (USITC) and updated regularly.

EU and UK equivalents

The EU uses 8-digit codes under the Combined Nomenclature (CN). The UK uses 10-digit codes under the UK Global Tariff (UKGT) since Brexit.

So the same product could have: - HS code: 8518.30 (universal, 6 digits) - EU CN: 85183000 (8 digits) - UK tariff: 8518300000 (10 digits) - US HTS: 8518.30.2000 (10 digits)

The first 6 digits will always match across all four. The national extensions diverge.

Why the difference matters

When filing a US customs entry, CBP requires the full 10-digit HTS code — not just the 6-digit HS code. Filing the wrong 10-digit code can result in:

- Incorrect duty payments (under or over) - Cargo holds or examinations - Penalties for material misstatements - Complications with quota-controlled goods

For e-commerce sellers shipping internationally, knowing the 6-digit HS code is usually sufficient for most markets. But when goods cross into the US in commercial quantities, you need the full HTS code.

How to find the right HTS code

The USITC maintains the official HTS at hts.usitc.gov. You can search by keyword or browse by chapter. CBP also maintains CROSS — a database of binding tariff rulings — which shows how CBP has classified similar products historically.

For most e-commerce sellers, the practical approach is: 1. Start with the 6-digit HS code (AI tools or the official WCO resources) 2. Look up the 4-digit national extension for your specific destination market 3. Verify against a prior ruling in CROSS (US) or EBTI (EU) if the classification is complex