One of the most common misconceptions among importers is that an HS code is a single, universal number. While the first six digits are indeed standardised across all WCO member countries, every country adds its own national extensions beyond those six digits. The result is that the same physical product can have different full codes in different countries — with different duty rates, licensing requirements, and regulatory conditions attached to each.
The Universal Six-Digit Core
All 200+ WCO member countries and territories agree on the first six digits of every HS code. This universal core covers chapters (2 digits), headings (4 digits), and subheadings (6 digits). When a trader in South Korea ships to a buyer in Brazil, both parties can reference the same six-digit code to identify the product unambiguously.
This international standardisation is what makes global trade statistics possible. The United Nations Comtrade database, which tracks trillions of dollars in trade flows, is built on the six-digit HS foundation.
The United States: 10-Digit HTS Codes
The United States uses a 10-digit Harmonized Tariff Schedule (HTS) code for imports. The first six digits follow the international HS standard. Digits seven and eight form the US statistical suffix at the heading level. Digits nine and ten are the statistical suffix at the subheading level, used to gather US-specific trade data.
Crucially, the US HTS duty rates are attached to the 10-digit level, not the six-digit level. Two products might share the same six-digit HS code but have completely different duty rates at the 10-digit level. This distinction is particularly important for products subject to Section 301 tariffs (China-origin goods) and Section 232 tariffs (steel and aluminium).
The European Union: CN and TARIC Codes
The EU uses an 8-digit Combined Nomenclature (CN) for import and export statistics. For calculating duties and applying trade measures, the EU extends codes to 10 digits using the TARIC (Integrated Tariff of the European Union) system.
The EU maintains a single tariff for all 27 member states, meaning a product entering France and a product entering Germany will be classified identically in theory. However, individual member states may apply different VAT rates and some may have additional national measures.
- 8 digits: CN code — used for Intrastat (trade between EU member states) and export declarations
- 10 digits: TARIC code — adds anti-dumping duties, tariff suspensions, and import/export licensing requirements
China: 13-Digit HS Codes
China operates one of the world's most detailed national tariff extensions. The Chinese HS code system uses 13 digits — the world's longest national extension. The first eight digits follow the international HS framework closely, but digits nine through thirteen are Chinese national extensions used for statistical and regulatory purposes.
Importantly, the 13-digit codes in China are split between import and export use. A product may have different codes depending on whether it is being imported or exported. This asymmetry creates confusion for businesses that assume a single code covers both directions.
India: 8-Digit ITC-HS Codes
India uses 8-digit Indian Trade Classification (ITC-HS) codes. The classification system is maintained by the Directorate General of Foreign Trade (DGFT) and the Central Board of Indirect Taxes and Customs (CBIC). India adopted the HS 2022 revision, but the transition was gradual and some older codes remain in circulation in trade documents.
India's import tariff structure is notably complex, with basic customs duty, additional customs duty (IGST), and various cess charges all determined by the 8-digit code. Free trade agreements with ASEAN, Japan, South Korea, and the UAE further complicate the duty landscape.
Australia: 10-Digit Working Tariff
The Australian Border Force uses a 10-digit Working Tariff classification. Australia has adopted HS 2022 and its national extensions align closely with the international standard. One notable feature of Australian tariff classification is the distinction between general and preferential tariff rates — the preferential rate applying to goods from countries with which Australia has FTAs.
Practical Implications for Importers
Understanding national code extensions is not merely academic — it has direct financial consequences:
- A product with a 0% duty at the six-digit level may face a 5% or 25% rate at the national extension level
- Anti-dumping duties are typically applied at the national extension level, not the six-digit level
- Licence requirements, import quotas, and prohibitions are attached to national codes
- Rules of origin calculations under FTAs are often performed at the national extension level
- Export rebates and drawbacks in the origin country are also code-dependent
TIP
When preparing a shipment, always verify the correct code under the destination country's national tariff — not just the six-digit international code. Use the official government tariff database for the destination country, as third-party databases can be outdated.