HS nomenclature updates 2026: impact on your classifications

The HS nomenclature is updated in 2026. Learn which changes matter for importers and how to prevent classification errors.

Pillar context

The Harmonized System for the description and coding of goods, universally known as the HS nomenclature, forms the backbone of international trade classification. Every five years the World Customs Organization revises this nomenclature, and the latest update introduces changes with direct consequences for tariff classifications, origin determinations, and compliance processes of European importers.

What changes in the HS 2026 update

The seventh edition of the Harmonized System introduces more than three hundred changes compared with the previous version. These range from merging existing codes to splitting broad categories into more specific subdivisions, from moving products between chapters to introducing entirely new codes for product types that did not exist in earlier editions.

New product categories

A significant portion of the changes concerns products that have grown in importance in recent years. Electric vehicles and their components receive more detailed subdivisions. Semiconductors and advanced electronics are classified more precisely. Sustainable materials and recycled content receive their own codes where they previously fell under broader categories.

For importers of these product groups, this means existing classifications must be reviewed. A product correctly classified under the previous nomenclature may require a different HS number under the new one. This potentially affects the applicable tariff, the rules of origin that apply, and the documentation that must accompany the declaration.

Merged and split codes

In addition to new codes, existing codes are merged or split. For mergers, the impact is generally limited: two codes become one, and the new code covers the same product range. For splits, the impact is greater: importers must determine under which of the new codes their products fall, and this assessment must be documented.

Splits are particularly relevant for companies claiming preferential origin. The rules of origin in free trade agreements are linked to specific HS codes. When a code is split, it can happen that the origin rule for one new code is more favourable than for the other. An incorrect choice can lead to wrongly claiming or missing preferential tariffs.

Moves between chapters

Some products are moved to a different chapter of the nomenclature. This potentially has the greatest impact, because chapter boundaries often determine the applicable rule of origin. A product moving from chapter 39 to chapter 84 thereby falls under an entirely different set of origin rules, potentially with different requirements for local value addition or processing.

Impact on origin determinations

The relationship between HS classification and origin determination is fundamental. Free trade agreements define rules of origin per HS code or per group of codes. When those codes change, the applicable rule of origin potentially changes as well.

Tariff shift rules

Many rules of origin are based on the tariff shift principle: a product acquires the origin of the country where it undergoes a change of tariff heading. When HS codes change, products that previously met a tariff shift may no longer do so, or vice versa. This requires a reassessment of all products for which a preference claim is made on the basis of tariff shift.

Value rules

For rules of origin based on local value addition, a change in HS code typically has less direct impact. However, if a product moves to a different group of codes for which a different value percentage applies, the calculation must be adjusted.

Specific processing rules

For products subject to specific processing rules, it must be verified whether the new classification still falls under the same processing rule. When a product moves to a different position, an entirely different processing requirement may apply.

Impact on CBAM reporting

The HS nomenclature changes also affect CBAM reporting. The Carbon Border Adjustment Mechanism identifies products falling under the mechanism by HS codes. When codes change, it must be verified whether products previously outside CBAM scope now fall within it, and vice versa.

Scope changes

The European Commission has linked the CBAM product list to specific HS codes. During the transition to the new nomenclature, the Commission publishes a concordance table indicating which new codes correspond to the former CBAM codes. Importers must check their product portfolio against this concordance table and update their CBAM registration and reporting accordingly.

Emissions data linkage

When a product receives a new HS number, the linkage with corresponding emissions data must be checked and repaired if necessary. Default values and benchmarks are linked to specific product categories, and a change in classification can mean that a different default value or benchmark applies.

Practical steps for importers

The transition to the new HS nomenclature requires a structured approach. The following plan covers the key actions.

Step 1: Inventory of affected products

The first step is identifying all products in the portfolio for which the HS code changes. The World Customs Organization publishes correlation tables indicating the corresponding code in the new nomenclature for each code. The compliance team must apply these tables to the product portfolio and document the results.

Step 2: Reassessment of classifications

For each affected product, the classification under the new nomenclature must be confirmed. For mergers, this is generally straightforward. For splits and moves, a substantive reassessment is needed, testing product specifications against the new code descriptions.

Step 3: Impact on origin determinations

For each product for which a preference claim is made, the applicable rule of origin under the new classification must be verified. If the rule changes, it must be assessed whether the product still meets the new rule. If not, the preference claim must be discontinued or an investigation must determine whether an alternative rule can be satisfied.

Step 4: Adjustment of supplier declarations

Supplier declarations contain HS codes. When codes change, suppliers must be informed and new declarations must be requested containing the correct new codes. This is also a good moment to renew declarations that were outdated on other grounds.

Step 5: Update of systems and databases

Tariff classification databases, ERP systems, and customs declaration software must be updated with the new codes. It is essential that all systems are updated simultaneously to prevent discrepancies between the classification in one system and another.

Step 6: Training and communication

The compliance team, logistics department, and relevant suppliers must be informed about the changes and their impact. Training should focus on the specific changes affecting the company, not the full set of three hundred-plus amendments.

Step 7: Validation and monitoring

After implementation, it must be verified that all declarations use the correct new codes, that preference claims are supported by valid declarations with the right codes, and that CBAM reporting contains the correct product identification.

Common pitfalls

Previous nomenclature changes have consistently revealed the same errors. Awareness of these pitfalls helps avoid them.

Automatic code conversion without validation

Some systems offer automatic conversion from old to new codes based on concordance tables. This works well for one-to-one mappings but can introduce errors in splits where human judgement is needed. Automatic conversion must always be validated.

Forgotten origin impact

Many companies focus primarily on tariff classification during a nomenclature change and forget the impact on origin determinations. Both must be assessed simultaneously, because a correct classification with an incorrect origin assessment is as problematic as a classification error.

Late adjustment of supplier declarations

Supplier declarations are often the last component to be updated. This creates a period where the classification in the system does not match the code on the supplier declaration. This discrepancy is a common finding during customs audits.

Missing documentation of the reassessment

It is not sufficient to update the codes. The compliance dossier must document why a particular new code was chosen, who performed the assessment, and on what basis. This is essential for the audit trail.

The role of automation

Nomenclature changes underscore the importance of automated compliance processes. Manually adjusting hundreds of product codes, with corresponding reassessments of origin rules and updates to supplier declarations, is time-consuming and error-prone.

Automated systems can load concordance tables and automatically indicate which products are affected, which reassessments are needed, and which suppliers must be contacted. They also maintain consistency between classification, origin determination, and supplier declarations, flagging discrepancies before they cause problems during a customs audit.

Conclusion

The HS nomenclature update 2026 is more than a technical exercise. It touches the core of the compliance process: correct classification is the foundation on which tariff treatment, origin determination, and CBAM reporting rest. A structured approach to the transition protects against errors and creates an opportunity to improve the classification process structurally.

Next step

Want to know which products in your portfolio are affected by the HS 2026 update and what the impact is on your origin determinations? See how PSRA detects classification changes and automatically flags the consequences for your compliance dossiers.

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Related definitions

  • HS classification: HS classification is the assignment of the correct goods code to a product based on characteristics and use.
  • BOM: A BOM is the bill of materials: the structured composition of a product.
  • Audit trail: An audit trail records who did what, based on which source data, and with what decision logic.