HS Code Classification Guide
Understanding the Harmonized System (HS) — the universal language of international trade.
What Is the HS?
The Harmonized System is a standardized system of names and numbers to classify traded products. Maintained by the World Customs Organization (WCO), it's used by over 200 countries.
Structure
HS codes follow a hierarchical structure:
8542.31.0000
│ │ │
│ │ └── National subdivisions (country-specific)
│ └───── Subheading (6 digits, international standard)
└────────── Chapter (2 digits)
| Level | Digits | Example | Description |
|---|---|---|---|
| Chapter | 2 | 85 | Electrical machinery |
| Heading | 4 | 8542 | Electronic integrated circuits |
| Subheading | 6 | 8542.31 | Processors and controllers |
| National | 8-10 | 8542.31.0000 | Country-specific classification |
International vs National
The first 6 digits are standardized worldwide. Every country that uses the HS uses the same 6-digit codes.
Countries then add their own digits for national tariff purposes:
| Country | Total Digits | Extra Digits |
|---|---|---|
| WCO Standard | 6 | — |
| United States (HTS) | 10 | 4 national digits |
| European Union (TARIC) | 10 | 4 national digits |
| United Kingdom | 10 | 4 national digits |
| India (ITC-HS) | 8 | 2 national digits |
How to Classify Goods
- Identify the product — What is it made of? What is its function?
- Find the chapter — Browse the 97 chapters for the best match
- Find the heading — Within the chapter, find the 4-digit heading
- Find the subheading — The 6-digit subheading narrows the classification
- Find the national code — The remaining digits for the destination country
General Rules of Interpretation (GRI)
The WCO provides 6 rules for resolving classification ambiguity:
- GRI 1 — Classification is determined by the section/chapter/heading text
- GRI 2(a) — Incomplete or unfinished articles classified as complete if they have the essential character
- GRI 2(b) — Mixtures and combinations classified by the material/component that gives essential character
- GRI 3 — When two or more headings apply, use the most specific
- GRI 4 — Classify by the heading for the most similar goods
- GRI 5 — Cases, containers, packing materials follow the goods they contain
- GRI 6 — Apply the same rules at the subheading level
Common Mistakes
- Using the wrong number of digits for the destination country
- Classifying by use rather than composition/form
- Using outdated codes (HS is revised every 5 years)
- Not considering the General Rules of Interpretation
HS Updates
The WCO revises the HS every 5 years. The current version is HS 2022. National tariff schedules are updated more frequently (quarterly for the US HTS).