Harmonized System (HS)

The Harmonized Commodity Description and Coding System generally referred to as "Harmonized System" or simply "HS" is a multipurpose international product nomenclature developed by the World Customs Organization (WCO).

It is set out in the Annex to the International Convention on the Harmonized Commodity Description and Coding System. Definition of the HS provided in the Convention: the HS means the Nomenclature comprising the headings and subheadings and their related numerical codes, the Section, Chapter and Subheading Notes and the General Rules for the interpretation of the Harmonized System, set out in the Annex to this Convention.

The HS comprises about 5,000 commodity groups; each identified by a six-digit code, arranged in a legal and logical structure and is supported by well-defined rules to achieve uniform classification.

The system is used by more than 200 countries and economies as a basis for their Customs tariffs and for the collection of international trade statistics. Over 98 % of the merchandise in international trade is classified in terms of the HS. 

The HS contributes to the harmonization of Customs and trade procedures, and the non-documentary trade data interchange in connection with such procedures, thus reducing the costs related to international trade.

It is also extensively used by governments, international organizations and the private sector for many other purposes such as internal taxes, trade policies, monitoring of controlled goods, rules of origin, freight tariffs, transport statistics, price monitoring, quota controls, compilation of national accounts, and economic research and analysis. The HS is thus a universal economic language and code for goods, and an indispensable tool for international trade.

The explanation provided by WCO Academy, which offers online courses related to the topic, e.g. Harmonized System - Textiles, Harmonized System - Industry & Construction, Harmonized System - Chemicals.