HS Codes (Harmonised System)

Harmonised System (HS) codes are the international language for classifying traded goods, maintained by the World Customs Organization and used by more than 200 countries for customs tariffs, trade statistics, and, increasingly, as a reference layer in public procurement systems that involve the cross-border supply of physical goods.

What is the Harmonised System?

The Harmonised System organises all physical goods into a hierarchy of sections, chapters, headings, and subheadings, producing a six-digit international code. Countries may extend the system to eight or ten digits for national tariff and statistical purposes, but the first six digits are universal. A hydraulic excavator, for example, carries HS heading 8429 regardless of where it is manufactured or imported. Because HS codes travel with goods through customs, procurement officers awarding supply contracts sometimes reference them to define technical specifications precisely and to monitor import duties that affect the total cost of an international bid.

HS codes describe physical goods only, unlike unspsc or cpv-common-procurement-vocabulary which cover both goods and services. For services classification, the UN's cpc-central-product-classification system is the international counterpart.

Why HS codes matter for bidders

If you supply physical goods to international buyers, HS codes affect your bid in two practical ways. First, tender specifications for supply contracts frequently reference the HS chapter or heading to define exactly what is being procured, so knowing the correct code for your product confirms you are quoting against the right item. Second, import duties based on HS classification directly affect your delivered cost, and a misclassified code can expose you to unexpected tariff charges or customs delays after contract award. Suppliers bidding on cross-border goods contracts should verify the HS classification of their products, model the import duty for the destination country, and factor both into pricing before submitting.

FAQ

How many digits is an HS code?

The internationally standardised portion is six digits. Countries extend this to eight or ten digits for national purposes, but the first six are identical worldwide under the Harmonised System.

Are services covered by HS codes?

No. HS codes classify physical goods only. Services are covered by separate systems such as the UN's Central Product Classification (cpc-central-product-classification) or, in EU procurement, the cpv-common-procurement-vocabulary.

Who maintains the Harmonised System?

The World Customs Organization (WCO) maintains and updates the Harmonised System, typically revising the nomenclature every five years to reflect changes in technology and trade patterns.