Combined Nomenclature (CN) Codes Explained | EU Goods Classification
A Combined Nomenclature code, usually called a CN code, is the European Union’s 8-digit goods classification used for customs declarations, tariff application, and trade statistics. It builds directly on the Harmonized System by using the same first 6 digits and then adding 2 EU digits for additional EU detail.
CN is the EU’s working classification for physical goods at the border. If a product is being declared for customs purposes or reported in EU merchandise trade statistics, the CN code is the core reference point used to identify the good.
The Combined Nomenclature is published each year for application from January 1. That means classification users should record the CN year used in any filing, dataset, or audit trail, especially when working across multiple years.
CN code anatomy
CN codes are hierarchical. The first 6 digits come from the global Harmonized System. The last 2 digits add EU-specific detail used for customs and statistical purposes inside the European Union.
The HS level provides the global product foundation. The added CN digits provide the extra EU level of detail used in EU customs and trade reporting.
Good CN classification is not just code matching. The product has to fit the legal meaning of the section, chapter, heading, and HS subheading before the CN subheading is selected.
HS vs CN vs TARIC
These systems are related, but they are not the same and should not be treated as interchangeable.
| System | Digits | Scope | Primary purpose |
|---|---|---|---|
| HS | 6 | Global | International goods nomenclature for customs and merchandise trade statistics |
| CN | 8 | European Union | EU customs and statistical nomenclature built on HS |
| TARIC | 10+ | European Union | Integrated EU tariff database that adds tariff and regulatory measures to CN |
If you want the global foundation behind CN, see Harmonized System (HS).
How to read a CN code
This example shows how a product classification narrows from broad legal categories to a specific CN code.
Plastics and articles thereof; rubber and articles thereof
Plastics and articles thereof
Waste, parings and scrap, of plastics
Of other plastics
Of polymers of propylene
The final 2 digits add EU specificity. Borderline cases are resolved using legal interpretation rules and explanatory guidance.
General Rules for the Interpretation
Accurate CN classification is a legal interpretation process. The General Rules for the Interpretation are the formal rules used to resolve ambiguity, mixtures, composite goods, incomplete goods, and situations where more than one heading seems possible.
What the rules do
- Define how headings, section notes, and chapter notes are applied
- Help classify incomplete, unfinished, mixed, or composite goods
- Provide a sequence for resolving multiple plausible headings
- Support more consistent classification outcomes
Why they matter
- Small product differences can change tariff treatment
- Misclassification can lead to delays, reassessments, or penalties
- Clear interpretation logic makes compliance easier to defend
- Professional classification work relies on this rule-based approach
A practical workflow is to start with the wording of the heading and the relevant section and chapter notes, then use the interpretation rules when ambiguity remains.
Binding Tariff Information
For higher-stakes classification questions, the EU provides Binding Tariff Information, usually called BTI. A BTI is a legal decision issued by an EU customs authority on the tariff classification of a product, and it is generally valid throughout the EU for 3 years.
- Useful for complex or hard-to-classify goods
- Helpful for recurring shipments and material duty exposure
- Supports more consistent internal compliance documentation
- Applies to the goods as described in the ruling
If the product is complex or the classification outcome has a meaningful duty impact, BTI can provide more certainty than repeated internal reclassification.
Applications of CN codes
- Customs declarations for goods entering or leaving the EU
- Tariff and measure application through the EU customs system
- Merchandise trade statistics and statistical reporting
- Support for quotas, restrictions, anti-dumping measures, and other trade controls
Common classification pitfalls
Matching by description alone
Classification is not simple keyword matching. Product names can be misleading if the legal wording points somewhere else.
- Fix: check notes and compare competing headings before choosing a code
Ignoring materials or composition
Many headings depend heavily on what the product is made of and how it is manufactured.
- Fix: document composition, function, and production stage before classifying
Treating kits as one obvious item
Sets, kits, and composite goods can trigger specific interpretation rules rather than straightforward heading selection.
- Fix: review the rules for sets, mixtures, and composite goods
Assuming the code never changes
CN is updated annually, and HS-level changes can also shift code boundaries over time.
- Fix: record the CN year used and revalidate classifications when the annual update takes effect
Primary sources
For official structure, annual publication, tariff layering, and BTI guidance, use these primary sources:
FAQ
- Is CN the same as HS?
No. HS is the global 6-digit goods classification. CN uses the same first 6 digits and adds 2 EU digits. - Is CN the same as TARIC?
No. CN is the 8-digit EU nomenclature layer. TARIC is the integrated EU tariff system that adds tariff and regulatory measures on top of CN. - How are borderline products classified?
Borderline cases are resolved using the General Rules for the Interpretation together with the relevant section notes, chapter notes, and explanatory guidance. - What is BTI and when should it be used?
BTI is a legal customs decision on tariff classification. It is most useful for complex goods, higher-value shipments, or recurring products where classification certainty matters. - Does the UK use CN?
CN is the EU goods nomenclature. The UK uses its own tariff and statistical systems after Brexit, so UK classification work should be checked against current UK-specific customs resources.