EU Combined Nomenclature (CN Codes): How the EU Classifies Imports and Why US Exporters Should Care

What Is the Combined Nomenclature?

The Combined Nomenclature (CN) is the EU's official system for classifying goods. Every product entering or leaving the European Union gets assigned an 8-digit CN code that determines:

The customs duty rate under the Common Customs Tariff
Whether trade defense measures apply (anti-dumping duties, countervailing duties, safeguards)
Whether CBAM carbon border fees kick in
Statistical tracking across all 27 EU member states
Eligibility for preferential rates under trade agreements

Think of it as the EU's version of the US HTS code system. Same concept, different execution. Both build on the same international foundation — the World Customs Organization's Harmonized System (HS) — but diverge after the first 6 digits.

Legal basis: Council Regulation (EEC) No 2658/87, updated annually. The current version (CN 2026) took effect January 1, 2026, under Implementing Regulation (EU) 2025/1926.

CN Code Structure: How the 8 Digits Work

A CN code is built in layers. Each layer adds specificity:

| Digits | Level | Scope | Example | |---|---|---|---| | First 2 | Chapter | Broad category | 85 = Electrical machinery | | First 4 | Heading | Product group | 8507 = Electric accumulators (batteries) | | First 6 | Subheading | International HS standard | 8507.60 = Lithium-ion batteries | | All 8 | CN subheading | EU-specific detail | 8507.60.00 = Li-ion accumulators |

The first 6 digits are identical worldwide — a lithium-ion battery is 8507.60 whether you're in Berlin, Bangkok, or Baltimore. Digits 7 and 8 are where the EU adds its own subdivisions for tariff and statistical purposes.

By the numbers: The CN contains 21 sections, 99 chapters (Chapter 77 is reserved), approximately 1,228 headings, and over 14,000 eight-digit subheadings.

CN vs HTS vs TARIC: The Classification Pyramid

This is where most people get confused. There are four overlapping systems, and they all start from the same base:

| System | Digits | Who Uses It | Purpose | |---|---|---|---| | HS Code | 6 | 200+ countries (WCO) | International baseline — covers 98% of world trade | | CN Code | 8 | EU (exports + statistics) | EU tariff classification and trade statistics | | TARIC Code | 10 | EU (imports) | Adds trade measures: anti-dumping, quotas, CBAM | | US HTS Code | 10 | United States (USITC) | US import classification and duty rates |

The critical thing to understand: digits 1–6 match across all four systems. A product classified as HS 8507.60 is 8507.60 everywhere on the planet. But digit 7 onward? Completely different between the US and EU.

A US HTS code of 8507.60.00.20 (lithium-ion batteries for vehicles) has no equivalent in the EU system beyond those first 6 digits. The EU's 8-digit CN code for the same product will have different 7th and 8th digits, and the 10-digit TARIC code adds EU-specific measures on top.

Practical example — exporting auto parts:

You're a US manufacturer shipping catalytic converters (HS 8421.39) to Germany. Your US HTS code might be 8421.39.01.00. For the German customs declaration, you need the 8-digit CN code: 8421.39.35 (catalytic converters for motor vehicles). Same first 6 digits, different national extensions. Your freight forwarder or EU customs broker should determine the correct CN code — never assume your US HTS suffix transfers.

When You Need TARIC (10 Digits)

CN codes (8 digits) are enough for EU exports and statistical reporting. But for imports into the EU, customs declarations require the full 10-digit TARIC code. The extra 2 digits encode:

Anti-dumping duties (e.g., on Chinese steel)
Tariff quotas and suspensions
CBAM reporting obligations
Sanctions and embargoes
Preferential duty rates under trade agreements

You can look up TARIC codes at the EU TARIC database or through Access2Markets.

How to Find the Right CN Code

Step 1: Start with Your HS Code

If you already know your US HTS code, you have the first 6 digits of your CN code. That narrows the search significantly.

Step 2: Use the EU's Official Tools

Access2Markets — the most user-friendly option. Browse by product description, get the CN code, and see the applicable duty rate, trade agreements, and required documents all in one place.
TARIC Consultation — the raw database. More comprehensive but harder to navigate. Updated daily.
EBTI Database — searchable archive of all Binding Tariff Information decisions. If someone already classified a product like yours, the ruling is here.

Step 3: When in Doubt, Get a BTI Ruling

A Binding Tariff Information (BTI) decision is a legally binding classification ruling from an EU customs authority. It's valid for 3 years across all 27 member states — if French customs says your product is CN 8507.60.00, German and Italian customs must honor that.

The scale: EU customs authorities issue roughly 50,000 BTI decisions per year. Germany alone handles over 56% of them. The EBTI database passed 1 million total decisions in 2018.

BTI applications take 30 days for acceptance plus up to 120 days for a decision. If you're importing regularly and the classification is ambiguous, it's worth the wait. Without a BTI, different ports may classify the same product differently — and you'll eat the difference.

What Changed in CN 2026

The CN gets updated annually, but the 2026 edition (Regulation 2025/1926, effective January 1) is more significant than usual. The EU added approximately 27 new codes and removed about 13, with a clear focus on the green energy transition.

New Codes for Batteries and Energy Storage

2841.90.40 — Lithium nickel manganese cobalt oxides (NMC cathode materials)
3801.10.10 — Artificial graphite powder with ≤0.05% ash content (anode material)
8507.90.31 — Battery separators made of plastic film, max 40 micrometers thick

These reflect the EU's push to track battery supply chain materials separately — partially driven by the EU Batteries Regulation and its due diligence requirements.

New Codes for Renewable Energy

3818.00.11 — Photovoltaic wafers of doped silicon
7308.20.10 — Tubular wind turbine steel towers and tower sections
8412.90.60 — Wind turbine blades
New subheadings in Chapter 85 for hydrogen fuel cell generators and MPPT (Maximum Power Point Tracking) inverters

Why This Matters for US Businesses

If you're exporting battery materials, PV components, or wind energy equipment to the EU, your products now have more specific CN codes. This means:

More granular duty rates — some new codes carry different rates than the broader codes they were carved out of
CBAM tracking — several new codes fall under CBAM reporting requirements
Trade statistics — the EU can now track green tech trade flows at a level it couldn't before

Check your codes. If you were using a broader CN code before 2026, your product may now require a more specific one. Using the old code isn't just inaccurate — it can trigger an audit.

CBAM: When Your CN Code Triggers Carbon Fees

The Carbon Border Adjustment Mechanism (CBAM) entered its definitive phase on January 1, 2026. Importers of certain carbon-intensive goods must now purchase CBAM certificates based on the embedded emissions of their products.

CBAM applies based on CN code. Your product's 8-digit CN code determines whether CBAM applies. Six sectors are covered:

| Sector | CN Code Chapters | Approx. Codes Covered | |---|---|---| | Iron & Steel | 72, 73 | ~47 | | Aluminium | 76 | ~14 | | Fertilizers | 28, 31 | ~7 | | Cement | 25 | ~5 | | Hydrogen | 28 | 1 | | Electricity | 27 | 1 |

The nuance people miss: not every product within a covered chapter is included. Aluminium car doors? Not covered. Aluminium nuts and bolts? Covered. The CN code is what determines the boundary, not the material alone.

New TARIC document codes for CBAM declarations (effective 2026): Y128 (authorized), Y238 (pending authorization), Y137 (de minimis exemption — up to 50 tonnes/year for certain sectors).

The Cost of Getting Classification Wrong

Here's a statistic that should get your attention: industry estimates suggest 30–40% of tariff codes used in EU customs declarations are incorrect. Two in every five shipments potentially misclassified.

Why It Happens

Trusting supplier codes without verification. Your Chinese or Vietnamese supplier's code is based on their country's system. The first 6 digits might match, but digits 7–8 (CN) or 9–10 (TARIC) won't. You're legally responsible as the importer, not the supplier.
Failing to update after annual CN changes. The CN changes every January 1. Products that used to fall under one code may shift to a new one. A synthetic handbag manufacturer in one documented case used an outdated code for three years — resulting in retroactive fines and duty reassessment.
Misclassifying multi-function products. A kitchen tool made of metal and plastic? Classification depends on "essential character" under the General Rules of Interpretation (GRI), not the most obvious material. These edge cases generate the most disputes — and the most penalties.
Ignoring chapter and section notes. The legal notes at the start of each CN chapter can override what seems like an obvious classification. In one ruling, calf hutches made of plastic were classified as plastic articles (higher duty) rather than prefabricated buildings because they lacked human height and weren't fully enclosed.

What Penalties Look Like

EU customs penalties are not harmonized — each member state sets its own. That makes the risk unpredictable:

| Country | Penalty Range | |---|---| | Spain | €200 to €600,000; up to 600% of evaded duties | | Denmark | DKK 1,000 to 100,000 per day | | Romania | Up to 10 years imprisonment for serious fraud | | Estonia | 1–30 days imprisonment |

About 52% of member states apply both administrative and criminal penalties. Another 30% use only criminal sanctions. Post-clearance audits can look back 3 years, and assessments typically include underpaid duty plus interest plus penalties of 50–200%.

EU Customs Reform: What's Coming

On March 26, 2026, the EU Council and Parliament agreed on the most sweeping customs reform since the Customs Union was created in 1968:

EU Customs Data Hub — a single platform replacing 100+ national customs IT systems. It will use AI and machine learning to automatically classify goods, determine tariff rates, and verify preferential treatment eligibility. Operational for e-commerce goods July 2028, mandatory for all goods by March 2034.
New EU Customs Authority (EUCA) — a decentralized agency based in Lille, France, coordinating enforcement across member states.
E-commerce shakeup — platforms become responsible for ensuring customs duties and VAT are paid at the point of purchase.

For classification specifically, the Data Hub's AI engine could reduce misclassification rates dramatically. But that's still years away. In the meantime, get your codes right the old-fashioned way.

July 2026: Low-Value Import Rule Changes

Starting July 1, 2026, EU imports under €150 (including IOSS consignments) will face a flat €3 customs duty per tariff subheading instead of a blanket exemption. If you're a US seller shipping low-value goods to EU consumers, this changes your cost structure.

Frequently Asked Questions

What is the difference between a CN code and an HS code?

An HS code is the 6-digit international standard used by 200+ countries. A CN code extends the HS to 8 digits with EU-specific subdivisions. The first 6 digits of any CN code are the HS code — identical worldwide. Digits 7 and 8 are where the EU adds its own classification detail for tariff and statistics purposes.

Can I use my US HTS code to find the EU CN code?

Partially. The first 6 digits of your HTS code match the CN code's first 6 digits (both are based on the HS). But digits 7–10 are completely different between the US and EU systems. Use the shared 6-digit HS code as a starting point, then look up the correct 8-digit CN code in the EU TARIC database or Access2Markets.

How often does the Combined Nomenclature change?

Annually. The European Commission publishes the updated CN by October 31, effective January 1 the following year. Most years involve minor adjustments — splitting or merging subheadings, aligning with WCO updates. The global HS framework itself undergoes a major revision every 5 years (next expected in 2028).

What happens if I use the wrong CN code?

At minimum: duty reassessment (you'll pay the correct rate retroactively, plus interest). At maximum: administrative fines up to €600,000 (Spain), daily penalty payments (Denmark), or criminal prosecution (Romania, Estonia). EU customs can audit the previous 3 years of declarations. The practical advice: if you're not sure, apply for a Binding Tariff Information (BTI) ruling before you ship.

Which CN codes trigger CBAM?

Products in six sectors: iron & steel (Chapters 72–73), aluminium (Chapter 76), fertilizers (Chapters 28, 31), cement (Chapter 25), hydrogen (2804.10.00), and electricity (2716.00.00). The full list of covered CN codes is in Annex 1 of the CBAM Regulation. Not every CN code within those chapters is covered — the specific subheading determines whether CBAM applies.

What US Businesses Should Do Next

Exporting to the EU? Cross-reference your US HTS codes with the 8-digit CN equivalent using Access2Markets. The first 6 digits match; digits 7–8 need verification.
Sourcing from the EU? Your EU supplier's CN code gives you the HS base for finding the correct US HTS code. Use our HTS search to find the full 10-digit US classification.
Importing CBAM-covered goods? Check whether your product's CN code falls under CBAM Annex 1. If it does, you'll need an EORI number and a CBAM declarant account.
Shipping low-value goods to EU consumers? The €150 de minimis exemption ends July 2026. Factor the new €3/subheading duty into your pricing.
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