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6 HS Code Classification Rules Master Before Customs Declaration.

Detailed 6 HS code classification rules by WCO to help businesses classify import/export goods accurately, reducing duty risks and customs delays.

8 min readUpdated

Looking up HS codes should not be done by intuition, let alone relying solely on the commercial product name on an invoice or supplier's description. A single product can go by many commercial names, but for customs declaration, the HS code must be determined based on the nature of goods, chapter notes, heading/subheading descriptions, and classification rules.

This is why declarants must master the 6 HS code lookup rules before declaring. These rules provide a clear classification logic, rather than picking codes by habit, Google search, or old experience.

Each rule handles a different classification situation, from chapter notes to detailed subheadings.

Why master the 6 HS code lookup rules before declaring?

An HS Code is not just a sequence of numbers filled on a declaration. The HS code directly affects import duty, VAT, product policies, licenses, specialized inspection, C/O and related documents.

In practice, many errors arise because the declarant only looks at the commercial name. For example, 'coffee' can refer to unroasted green coffee beans, roasted ground coffee, or 3-in-1 instant coffee, all of which have different HS codes, leading to different tax rates and regulatory conditions.

Therefore, before using any lookup tool, businesses should understand basic HS Code classification principles. If you need a broader workflow, check out the article on how to look up HS codes to understand the path from product description to declared code.

RuleCore ContentWhen to Use
Rule 1Based on chapter notes, heading and subheading descriptionsFirst step in classifying goods
Rule 2AIncomplete, disassembled, or blank productsWhen goods are unfinished but have the essential character of finished goods
Rule 2BMixtures or combinations of multiple materialsWhen product consists of multiple ingredients or materials
Rule 3APrefer headings with the most specific descriptionWhen goods can belong to multiple headings
Rule 3BClassify by the component giving the essential characterWhen goods are retail sets, combos, or multi-material
Rule 3CChoose the heading that appears last in numerical orderWhen Rules 3A and 3B cannot be applied
Rule 4Classify by the most-akin goodsWhen cannot be determined by previous rules
Rule 5ASpecially shaped cases, boxes, and containersWhen packaging is designed specifically for the product
Rule 5BOrdinary packagingWhen packaging is only used for packing and transport
Rule 6Compare at the same subheading levelWhen going from heading to subheading and detailed code

Rule 1: Read chapter notes and legal descriptions before choosing a code

Rule 1 is the foundation of the entire HS determination process. Section, chapter, or sub-chapter titles only help the declarant orient where the goods might be located in the tariff. However, these titles are not enough to conclude the final HS code.

Declarants need to read section notes, chapter notes, heading and subheading descriptions. This is the only basis for determining whether the goods actually belong to the chapter or heading under consideration.

For example, a product may look like it belongs to a certain chapter, but the chapter notes exclude that product and lead to another chapter. Conversely, if the tariff has a very specific description for the product, and the notes do not exclude it, the declarant can prefer that description.

Rule 2: Unfinished goods and mixtures

Rule 2A: Incomplete, disassembled, or blank products

Rule 2A applies to incomplete, unfinished, disassembled or unassembled articles, and blanks. If an unfinished article has the essential character of the complete or finished article, it is classified as if it were finished (e.g., a car missing its wheels is still classified as a car). This rule also applies to disassembled goods imported for transport convenience (such as knock-down furniture). However, if the goods require significant further processing or have excess parts not needed for assembly, this rule does not apply.

Rule 2B: Mixtures and combinations of materials or substances

Rule 2B applies to mixtures and combinations of materials or substances. If a product consists of multiple ingredients or materials belonging to different headings (e.g., 3-in-1 instant coffee consisting of coffee, sugar, milk powder, creamer), it cannot be classified by looking at individual components alone. One must determine which material or component gives the product its essential character and how it is marketed and used by consumers.

Rule 3: When goods can belong to multiple headings

Rule 3A: Prefer headings with the most specific description

The heading which provides the most specific description shall be preferred to headings providing a more general description. For example, an electric shaver or hair clipper could fall under electric hand tools, but the tariff contains a specific heading for 'Shavers, hair clippers and hair-removing appliances, with self-contained electric motor,' which must be preferred.

Rule 3B: Classify by the component giving the essential character

Applies to mixtures, composite goods consisting of different materials, and goods put up in sets for retail sale. Such goods are classified according to the material or component that gives them their essential character. The essential character may be determined by primary function, role in the set, value, quantity, weight, or material. For example, a coffee gift set containing roasted coffee, an aluminum filter, a glass cup, and a spoon. If the buyer chooses the set mainly for the coffee, then the coffee is the component providing the essential character for classifying the entire set.

Rule 3C: Choose the heading that appears last in numerical order

When goods cannot be classified under Rule 3A or 3B, they shall be classified under the heading which occurs last in numerical order among those which equally merit consideration. This is a last resort and only applied after thorough comparison yields no result under 3A and 3B.

When goods can belong to multiple headings, Rule 3 provides 3 branches A, B, C to determine the correct code.

Rules 4, 5 & 6: Most-akin goods, packaging and subheadings

Rule 4: Classify under the heading appropriate to the goods to which they are most akin

Rule 4 is used when goods cannot be clearly classified according to previous rules. In this case, the product is classified under the heading appropriate to the goods to which they are most akin in terms of description, characteristics, composition, functions, and intended use. This is common for new or unique products not explicitly described in the tariff.

Rule 5A: Specially shaped cases, boxes, and containers

Applies to specially shaped cases, boxes, bags, or containers designed to hold a specific article or set of articles, suitable for long-term use and presented with the articles for which they are intended. These containers are classified with the articles they contain (e.g., a glass case presented with glasses, a musical instrument case). However, if the container gives the whole its essential character (very high value or distinct independent use), it should not be classified with the main product.

Rule 5B: Ordinary packaging

Applies to packaging materials and packing containers normally used for packing and imported with the goods (such as plastic bags, cardboard boxes, PP bags). Ordinary packaging is classified with the goods inside. However, this rule is not binding for packaging suitable for repetitive use.

Rule 6: Compare at the same subheading level

Rule 6 is used when classifying goods at the subheading level. After determining the correct 4-digit heading, classification into subheadings (6-digit or 8-digit) must be done by comparing subheadings at the same level (e.g., a one-dash subheading should only be compared with another one-dash subheading). Do not rush to choose codes without drilling down to the correct level.

Example of applying the 6 rules to coffee HS code lookup

Suppose a business needs to declare unroasted Robusta coffee beans, not decaffeinated, in 60kg bags for export. This seems simple, but if the description is unclear — green beans, roasted, instant, or a gift set — the classification direction can differ.

With Rule 1, the declarant needs to check the chapter and headings related to coffee, while reading descriptions carefully to determine: unroasted vs roasted, decaffeinated vs not.

With Rule 2A, unroasted green coffee is not disassembled goods or a product blank. However, if it were a disassembled coffee roaster, we should apply this rule.

With Rule 2B, if the goods are pure coffee, mixtures rarely arise. But for 3-in-1 instant coffee, we must consider the ingredients and the product's essential character to apply Rule 2B.

With Rule 3B, if the goods are a gift set of coffee, filter, cup and spoon, we determine which component gives the essential character. If the buyer chose it primarily for coffee, coffee is the key element.

With Rule 5B, a PP or jute 60kg sack is typically ordinary packaging for transport and storage, which does not alter the goods' nature.

Finally, Rule 6 requires the declarant to drill down to the subheading level to distinguish unroasted vs roasted, decaffeinated vs not, before concluding the detailed code.

Although all coffee, the state of processing, ingredients, and purpose of use can lead to different classification directions.

How to mitigate risks when determining HS codes

To mitigate risks in HS code determination, businesses should standardize product information before lookup. Product descriptions must be comprehensive: not just the commercial name, but also materials, composition, functions, processing state, packaging, catalogs, images, and related documents.

Declarants should also document the classification basis, including chapter notes, heading/subheading descriptions, reasons for excluding other codes, and reasons for choosing the final code. This documentation helps businesses defend their classification during customs audits or reviews.

For complex items, companies can use supporting tools for a quick initial assessment. You can perform an AI-powered HS code lookup on Gexim to get suggested classification directions, necessary reference notes, and verification points before filing.

FAQ

Must the 6 HS code lookup rules be applied in order?+
Yes. Declarants should follow the sequence from Rule 1 to Rule 6. Do not skip to later rules without checking the earlier ones, as each rule only applies in specific situations.
What is the difference between Rule 2A and Rule 2B?+
Rule 2A relates to incomplete, disassembled, or blank products. Rule 2B relates to goods that are mixtures or combinations of multiple materials or substances.
When is Rule 3C used?+
Rule 3C is used only when Rules 3A and 3B cannot be applied. This is the last resort when the most specific description or essential character cannot be determined.
Can I look up an HS code by product name only?+
Not recommended. Product name is just the starting point. To determine the HS code, you must examine the true nature, composition, usage, processing state, chapter notes, heading and subheading descriptions.

Conclusion

The 6 HS code lookup rules are a critical foundation for logical product classification rather than guesswork. Understanding Rules 1, 2A, 2B, 3A, 3B, 3C, 4, 5A, 5B, and 6 significantly reduces the risk of incorrect codes, wrong duties, or lack of classification basis in customs declarations.

Before declaring, start with clear product descriptions, check chapter notes, compare at the correct subheading level, and save the classification basis. For complex goods, you can try AI-powered HS code lookup on Gexim for helpful directions before entering the HS code on your declaration.

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Dựa trên cơ sở dữ liệu hải quan và biểu thuế cập nhật mới nhất, Gexim AI giúp bạn đối chiếu, phân tích bản chất hàng hóa và gợi ý mã HS chính xác chỉ trong vài giây.

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HS code6 rulesProduct classificationCustoms clearance
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