Customs classification and tariff codes.
Customs systems rely on structured commodity descriptions. The most common reference is the Harmonized System (HS), which provides a shared code structure for goods. This site provides an overview of what customs classification is, how HS-style codes are structured, and where they are commonly used.
This site does not check or confirm commodity codes. It does not validate, certify, or provide results. It is an independent reference site and is not affiliated with any customs authority.
1) What it is
Definition, purpose, and who uses customs commodity codes in practice.
2) How it's structured
HS chapters and headings, common digit lengths, and neutral format examples.
3) Where it's used
Declarations, tariffs, import VAT context, trade statistics, and compliance workflows.