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Customs & Classification

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

May 20264 min read

Both codes classify physical goods for customs — but they're not interchangeable. Using the wrong one on US import documents can delay your shipment and trigger CBP penalties. Here's the definitive answer.

The one-line answer

An HS code is a 6-digit international code used in 190+ countries. An HTS code is the US extension of that code — 10 digits — used specifically for US import entries to determine the exact duty rate and quota status.

Side-by-side comparison

AspectHS CodeHTS Code (US)
Full nameHarmonized SystemHarmonized Tariff Schedule
Managed byWorld Customs Organization (WCO)US International Trade Commission (USITC)
Used in190+ countries (international standard)United States only
Code length6 digits10 digits (6 HS + 4 US-specific)
Example6109.10 (cotton t-shirts)6109.10.0012 (men's cotton t-shirts)
PurposeUniversal product classification & trade statsUS duty rates, import quotas, trade stats
Update cycleEvery 5 years (WCO HS Revision)Updated continuously by USITC
Required onExport documents, commercial invoices globallyUS import entry documents (CBP Form 7501)

Breaking down a real HTS number

Take a men's cotton t-shirt. Its HTS number is 6109.10.0012:

61HS Chapter — Articles of apparel and clothing accessories, knitted or crocheted
6109HS Heading — T-shirts, singlets and other vests, knitted or crocheted
6109.10HS Subheading — Of cotton (6-digit HS code)
6109.10.00US tariff paragraph (8-digit)
6109.10.0012Full 10-digit HTS — Men's or boys' (US statistical suffix)

Which one do I use on my documents?

US import entry (CBP Form 7501)

Full 10-digit HTS code required

Determines duty rate, quota, ADD/CVD applicability

Commercial invoice (any country)

6-digit HS code acceptable

Most customs authorities accept 6 digits; more is always fine

Export declarations (EEI / AES)

Schedule B code (US export)

Schedule B is the US mirror of HTS for exports — different suffix digits

Shopify product listings

6-digit HS code minimum

Shopify's Duties & Import Taxes uses the 6-digit code to calculate duties at checkout

EU import entry (SAD form)

8-digit CN/TARIC code

EU uses its own Combined Nomenclature (CN) — starts with the same 6-digit HS base

How to find the right code for your product

The fastest method is AI classification — describe your product in plain English and get the correct 6-digit HS code (and 10-digit HTS for US imports) in seconds. Manual lookup through the USITC HTS database works but is slow for large catalogs.

Free AI HS / HTS lookup

Type a product description — the AI returns the 6-digit HS code, suggests the US 10-digit HTS suffix, and shows the applicable duty rate.

Try free lookup

Bulk-classify your entire product catalog

Zentria Flow assigns HS and HTS codes to hundreds of SKUs at once — with confidence scores, duty rates, and compliance notes for every product.

Zentria Brain