HS code

# HS code The Harmonized Commodity Description and Coding System, universally known as the HS, is the World Customs Organization's international product classification for traded goods. Its six-digit codes form the common language of customs worldwide: they determine duty rates, import controls and trade statistics for virtually every physical product crossing a border. ## Key facts - The HS is maintained by the World Customs Organization (WCO) and used by more than 200 countries and customs territories. - The international level has six digits; countries extend codes to 8, 10 or more digits for national tariffs. - HS classifications cover about 98 percent of merchandise in international trade, grouped into roughly 5,300 commodity descriptions. - The system is organised into 21 sections and 99 chapters, arranged broadly from raw materials to manufactured goods. - Correct classification determines the duty rate, applicable import licences, trade remedies and statistical reporting. - The WCO updates the HS roughly every five years; HS 2022 is the current edition and HS 2027 is under development. - Interpretation follows the six General Rules of Interpretation (GRI), applied in strict hierarchical order. ## How the HS is structured The six digits of an HS code are read in pairs. The first two digits are the chapter: for example, chapter 85 covers electrical machinery and equipment. The next two digits are the heading within the chapter, such as 8517 for telephone sets and other apparatus for communication networks. The final two digits are the subheading, narrowing further, such as 8517.12 for smartphones. Reading left to right, each step adds specificity, which is why classification is often described as moving from the general to the particular. The 21 sections group related chapters, starting with live animals and foodstuffs, moving through chemicals, plastics, textiles, metals and machinery, and ending with special categories such as works of art. Chapters 98 and 99 are reserved for special national use, and chapter 77 is held in reserve for future needs. This structure means that where a product sits in the HS reflects what it is made of and what it does, which is exactly what customs needs to apply the right treatment. National tariffs build on the six-digit base. The European Union uses the Combined Nomenclature with eight digits and the TARIC system with ten digits for measures such as anti-dumping duties. The United States uses the ten-digit Harmonized Tariff Schedule (HTS), and the United Kingdom uses the ten-digit UK Global Tariff. The first six digits are identical across all these systems, so a classification agreed at six digits is valid worldwide, while the extra digits are purely national. ## The General Rules of Interpretation Classification disputes are settled by the six General Rules of Interpretation, which must be applied in order. GRI 1 states that classification is determined by the terms of the headings and any relevant section or chapter notes: the legal text comes first. GRI 2 covers incomplete, unfinished and unassembled goods, and mixtures, allowing classification of goods presented in a form that is not yet the finished article. GRI 3 deals with goods that could fall under two or more headings, such as sets and composite goods. It applies a hierarchy: the most specific description wins; if that fails, the component giving the goods their essential character decides; and if that fails, the heading occurring last in numerical order applies. GRI 4 is a fallback to the goods most akin to the product, GRI 5 covers packing materials and containers, and GRI 6 extends the same principles to classification at subheading level. Section and chapter notes carry the same legal force as the headings themselves and frequently decide close cases, for example by defining terms or excluding certain goods from a chapter. Experienced classifiers read the notes before the headings, because a note can remove a product from the chapter where its description seems to fit. ## Why classification matters for market access The HS code is the key that unlocks the tariff. Duty rates in every customs tariff are indexed by HS code, so two similar products in different headings can face very different duties. Classification also triggers regulatory controls: import licensing, product safety checks, sanitary and phytosanitary measures, export controls and trade remedies such as anti-dumping duties are all defined by HS code ranges. Rules of origin under free trade agreements also operate through the HS. Preferential origin criteria are frequently expressed as a change of tariff classification: a product qualifies as originating if non-originating materials undergo processing that moves the finished good into a different heading or chapter. An incorrect HS code can therefore destroy a claim to zero duty under an agreement. Trade statistics, market research and compliance screening all use HS codes as well. Companies monitor import volumes by HS code to size markets, and denied-party and sanctions screening systems use them to flag controlled goods. Getting classification right at the product development stage avoids costly re-engineering of supply chains later. | Digit level | Example | Who defines it | |---|---|---| | 2 digits (chapter) | 85: electrical machinery | WCO, international | | 4 digits (heading) | 8517: communication apparatus | WCO, international | | 6 digits (subheading) | 8517.12: smartphones | WCO, international | | 8 digits (CN subheading) | 8517.12.00 | EU, national | | 10 digits (TARIC / HTS) | 8517.12.00.50 (illustrative) | EU / US, national | ## Binding rulings and managing classification risk Because classification determines money, disputes are common. Most major customs administrations offer binding classification rulings: the EU issues Binding Tariff Information (BTI), valid for three years across all member states, and US Customs and Border Protection issues CROSS rulings. A binding ruling gives legal certainty for planning, provided the goods exactly match the description in the application. Companies should classify products before the first shipment, document the reasoning with reference to the GRIs and the relevant notes, and keep samples, specifications and bills of materials that support the chosen code. Where a product is genuinely ambiguous, seeking a binding ruling is cheaper than defending a reassessment with back duties and penalties. Classification should be reviewed when products change. A design modification, a new function or a change in composition can move a product to a different heading. Periodic audits of the codes used in customs declarations catch drift before it becomes a compliance incident, and they often uncover duty-saving opportunities where a more precise subheading carries a lower rate. Many companies centralise classification in a product master database that links each SKU to its HS code, the reasoning behind it and any binding rulings obtained. This prevents different offices or brokers from declaring the same product under different codes, which is a classic trigger for customs audits. Training purchasing and engineering teams to flag specification changes to the trade compliance function keeps the database accurate as products evolve. ## HS revisions and staying current The WCO revises the HS roughly every five years to reflect changes in technology and trade patterns. HS 2022, which entered into force on 1 January 2022, added classifications for new products such as drones, smartphones were already covered, and expanded coverage of e-waste, tobacco products and dual-use goods. Each revision renumbers some codes and deletes others, so companies must map their product codes across editions. The next edition, HS 2027, is under development through the WCO's Harmonized System Committee. National tariffs implement each revision on their own timetables, and correlation tables published by the WCO and national administrations map old codes to new ones. Contracts, origin calculations and binding rulings that reference specific codes should be checked against each new edition, because a renumbered code can silently invalidate a ruling or a preferential origin claim. ## Frequently asked questions Who decides the correct HS code for my product? The importer or exporter is responsible for declaring the correct code, applying the General Rules of Interpretation. Customs can challenge the declaration. For certainty, apply for a binding ruling from the customs administration of the importing country. Is the six-digit HS code the same everywhere? Yes. All contracting parties apply the same six-digit codes. Differences appear only at eight digits and beyond, where countries add national subdivisions for duty rates and measures. Can one product have more than one plausible HS code? Frequently. Composite goods, multifunction devices and novel products often fit more than one heading. GRI 3 resolves these cases through specificity, essential character and numerical order, in that sequence. What is the difference between the HS, the CN and the HTS? The HS is the six-digit international system. The CN (Combined Nomenclature) is the EU's eight-digit extension, and the HTS (Harmonized Tariff Schedule) is the US ten-digit extension. TARIC adds further EU subdivisions for specific trade measures. How often does the HS change? Roughly every five years. The current edition is HS 2022 and the next is HS 2027. Companies should track revisions because renumbered codes affect duty calculations, rulings and origin claims. What happens if I classify incorrectly? Customs can reassess the goods, collect the duty shortfall, and impose penalties and interest. Systematic errors can trigger audits. Voluntary disclosure and binding rulings are the standard ways to manage this risk. ## Sources - WCO Harmonized System overview - US Harmonized Tariff Schedule search - UK Global Tariff lookup