HS Codes Explained: Structure, Classification, Examples & HS 2028 Update

The Harmonized System (HS) is the international product-classification framework used as the basis for customs tariffs and trade statistics around the world. For supply-chain and trade professionals, the HS code affects much more than paperwork: it can influence duty, import restrictions, certificates, preferential treatment, reporting and customs risk.

As of 2026, HS 2022 remains the current edition in force. The World Customs Organization (WCO) has published HS 2028, which will become effective on 1 January 2028. Businesses should therefore maintain current HS 2022 classifications while preparing for codes that may change under HS 2028.

What Is an HS Code?

An HS code is a numerical classification assigned to a traded product under the Harmonized Commodity Description and Coding System maintained by the WCO. The international HS classification is standardized to six digits. Individual countries or customs unions may add additional digits for national tariff, statistical or regulatory purposes.

HS Code Structure: 2, 4 and 6 Digits

For example, Chapter 08 covers edible fruit and nuts. Within it, heading 0805 covers citrus fruit. The six-digit level then divides the heading into more specific product groups. The exact national tariff code may continue beyond six digits depending on the importing country.

HS Code vs Tariff Code

The terms are often used interchangeably, but they are not always identical. The HS code refers to the internationally standardized six-digit classification. A tariff code or national tariff line normally includes additional digits used by a particular customs administration.

That means a six-digit HS classification may be the same internationally while the complete import code differs between Bahrain, the United States, the European Union, India or another market.

How to Classify a Product

Good HS classification should start with the product itself, not with a supplier’s old invoice or a keyword search. A practical workflow is:

1. Define the product accurately. Gather composition, function, material, manufacturing method, technical specifications, packaging and intended use.
2. Identify possible sections, chapters and headings. Use the wording of the tariff rather than relying only on common product names.
3. Apply the General Rules for the Interpretation of the Harmonized System (GIRs). Classification is governed by the legal structure of the HS, including headings and relevant section/chapter notes.
4. Review legal notes and explanatory material. Exclusions, composition thresholds and product-specific wording can change the result.
5. Select the correct six-digit HS subheading.
6. Extend the code using the importing country’s national tariff schedule.
7. Document the classification rationale. Keep specifications, decisions, rulings and supporting evidence.
8. Review classifications periodically. Product changes, tariff amendments or HS revisions may require reclassification.

Why Accurate Classification Matters

• Customs duty: different tariff lines may carry different rates.
• Import taxes and fees: classification can influence the customs treatment applied.
• Licences and controls: some products require permits, inspection or certificates.
• Preferential origin: rules of origin are commonly linked to HS headings or subheadings.
• Trade remedies: anti-dumping, safeguard or other trade measures can be product-code specific.
• Trade statistics: customs administrations use HS-based data to compile international trade statistics.
• Customs compliance: repeated or material misclassification can lead to reassessment, delays, penalties or disputes depending on local law.

Practical Classification Example

Assume a buyer is importing a packaged food product. The commercial description “snack mix” is not enough to determine the HS code. The classifier may need to know:

• the ingredients and percentage composition;
• whether the product is roasted, cooked, preserved or otherwise prepared;
• whether it is predominantly nuts, cereals, fruit or another material;
• the form in which it is presented; and
• the relevant legal notes and subheading wording.

This is why copying the code used for a vaguely similar product can create compliance risk.

Common HS Classification Mistakes

• Using a supplier’s code without checking the importing country’s tariff schedule.
• Classifying from a short marketing description instead of technical product information.
• Assuming the same 8- or 10-digit code applies in every country.
• Ignoring section and chapter notes.
• Using duty rate as the reason for choosing a classification.
• Failing to update classifications after a product composition or specification change.
• Continuing to use an old code after an HS revision without checking the correlation.

HS 2022 and the HS 2028 Update

The WCO identifies HS 2022 as the seventh edition of the Harmonized System. It is currently used worldwide as the international classification standard. The WCO has also published the eighth edition, HS 2028, which will enter into force on 1 January 2028.

The WCO has released correlation tables between HS 2022 and HS 2028. These are useful for transition planning, but the WCO notes that the correlation tables are guides and do not themselves constitute legal classification decisions.

How Businesses Should Prepare for HS 2028

• Maintain a controlled master list of current HS 2022 classifications.
• Identify high-volume, high-duty and regulated items first.
• Map existing six-digit codes against the WCO 2022–2028 correlation tables.
• Check whether descriptions, headings or subheadings change.
• Review the national tariff implementation in each importing country before 2028.
• Update ERP, customs broker instructions, item masters and compliance documentation in a controlled manner.

Useful Fields in an HS Classification File

Interview Question: How Would You Determine an HS Code?

A strong answer is: I would first gather complete technical information about the product, then review the relevant tariff headings, legal notes and the General Rules for Interpretation. After identifying the six-digit HS classification, I would confirm the importing country’s national tariff line and document the rationale rather than relying only on a supplier’s historical code.

Related SCMANA Guides

• Import Customs Clearance: Document Checklist
• Incoterms Explained
• Customs Duty, Taxes and Tariffs

References

• World Customs Organization, HS Nomenclature 2022 Edition
• World Customs Organization, HS Nomenclature 2028 Edition
• World Customs Organization, Correlation Tables HS 2022–2028