HS Code vs HTS Code: What's the Difference?
HS codes are the 6-digit WCO nomenclature used worldwide. HTS codes are the US 10-digit extension. Includes classification examples and lookup workflow.
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Short version: the HS code is the 6-digit international standard from the World Customs Organisation. The HTS code is the 10-digit US extension of the HS, maintained by the US International Trade Commission. Every US import entry uses the 10-digit HTS.
The structure
Take a mens' cotton t-shirt as an example:
- Chapter 61: Articles of apparel and clothing accessories, knitted or crocheted
- Heading 6109: T-shirts, singlets and other vests, knitted or crocheted
- HS-6 subheading: 6109.10: Of cotton (this is the international HS code)
- HTS-8 subheading: 6109.10.00: Of cotton, not specified (US extension)
- HTS-10 statistical: 6109.10.00.12: Men's or boys' (final 2 digits are US statistical)
The first 6 digits (6109.10) are identical worldwide. The last 4 (00.12) are US-only.
Who maintains what
- HS is maintained by the World Customs Organisation. Updated every 5 years (HS 2017, HS 2022, HS 2027 forthcoming).
- HTS is maintained by the US International Trade Commission. Republished every few weeks with rate changes, proclamation modifications, and Chapter 99 overlays.
- Schedule B is maintained by the US Census Bureau for exports.
Where the divergence matters
For most consumer goods the last 4 HTS digits are trivial statistical detail. For four categories they matter significantly:
- Textile and apparel (Chapters 50-63): US statistical detail splits by fibre content, gender, and construction. A misdeclared 10-digit code can trigger a Textile Interdiction from CBP's Office of Trade.
- Chemicals (Chapters 28-38): EPA and TSCA requirements attach at HTS-10 for specific CAS numbers.
- Electronics (Chapters 84-85): FCC and DOE Energy Star flags attach at HTS-10. Wrong code can force a redelivery.
- Steel and aluminum (Chapters 72-76): Section 232 quota and derivative-full-value rules attach at HTS-10.
Lookup workflow
Use both, in this order:
- Start with the HS-6 to identify the international chapter and heading. WCO's browser or LandedFees HTS lookup both work.
- Drill into the US HTS-10 for the exact statistical subheading and duty rate.
- Cross-check Chapter 99 overlays for Section 232/301/122/CAPE additions.
- Confirm the classification against USITC's binding-ruling database (CROSS) to avoid known-mistake patterns.
Common mistakes
- Filing HS-6 on a US entry: rejected by ACE.
- Using an HS code from the exporter's country: valid for HS-6 only. Digits 7-10 must be US-derived.
- Relying on an HS code printed on the commercial invoice: the invoice HS is advisory and does not bind the US classification.
Related terms
Primary sources
- WCO HS 2022 Nomenclature: wcoomd.org
- USITC Harmonized Tariff Schedule (live): hts.usitc.gov
- 19 CFR 152 (Classification): ecfr.gov
- 19 USC 1484 (Entry of merchandise): uscode.house.gov
Frequently asked questions
How long is an HS code vs an HTS code?
An HS code is 6 digits. An HTS code is 10 digits: the first 6 match the international HS, and the last 4 are US-specific statistical detail added by USITC. Every country extends the WCO 6-digit HS to 8 or 10 digits with its own domestic subheadings.
Can I use an HS code on a US customs entry?
No. The Automated Commercial Environment (ACE) rejects entries with fewer than 10 digits. The HTS code is mandatory for CBP filings. HS is only sufficient for pre-classification research, WCO reference, or trade-statistics analysis.
Are the first 6 digits of the HTS always the same as the HS?
Yes, by treaty. The World Customs Organisation revises the HS every 5 years (HS 2017, HS 2022, next revision HS 2027) and member countries including the US, EU, UK, China, Japan, and India are bound to keep the first 6 digits aligned. National subheadings (digits 7-10 in the US, 7-8 in most EU countries) can diverge.
What's a Schedule B code and how does it relate?
Schedule B is the US export classification schedule maintained by Census. It uses HS chapter and heading structure but the last 4 digits diverge from HTS. Use Schedule B for exports and HTS for imports. Cross-reference tables exist on the Census Foreign Trade site.
Who is legally responsible for the classification decision?
The Importer of Record. Even if a customs broker or freight forwarder enters the HTS on the 7501, the IOR carries statutory Reasonable Care liability under 19 USC 1484. Misclassification penalties range from lost duty to 4x the value under 19 USC 1592 fraud provisions.
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