HS-2, HS-4, and HS-6: what stays global
The WCO Harmonized System defines a common structure. Up to six digits (HS-6), classification is the same for every member country. Beyond that, each customs territory publishes its own tariff lines—such as the US HTS, India ITC-HS, or EU TARIC.
HS-2 (chapter)
Two digits (01–97) group broad product families—for example chapter 61 for knitted apparel. Our chapter directory lists every HS-2 title with section context.
HS-4 (heading)
Four digits refine the category within a chapter (e.g. 6105 for knitted shirts). Heading notes and exclusions are where many classification disputes are decided.
HS-6 (subheading)
Six digits are the international “line” used for statistics and FTA comparisons. National schedules extend HS-6 with additional digits for duty, quotas, and reporting—without changing the first six digits.
Common HS structure questions
Frequent user-style questions that come up while moving from chapter to heading and final HS-6 line.
- What does n.e.c. mean in HS codes?
- How to classify cotton yarn for import?
- How to classify dyed cotton fabrics?
- How do I determine the right HS code for my fabric?
- How do I find the right HS code for my product?
- How to determine the correct HS-6 code?
- How do I determine the correct HS code for my shipment?
- How to classify unexposed photographic film?
- How to determine the correct HS code for chemicals?
- How do I determine the correct HS code for my fabric?
- How do I determine the fiber content for classification?
- How to classify unbleached cotton fabrics?
Long-tail classification topics
Specific search-style topics users check when two codes look similar.
- how to choose the right HS-6 subheading
- How to classify cotton yarn with less than 85% cotton
- Understanding HS codes for organic chemicals
- understanding HS codes for seafood products
- understanding textile material classifications
- What does n.e.c. mean in HS codes?
- Guidelines for importing lightweight cotton fabrics
- How to avoid misclassification with HS codes
- How to classify cotton yarn with 85% cotton content
- Understanding HS codes for inorganic chemicals
- Understanding HS codes for wood products
- customs regulations for frozen fish imports