Tariff Classification — How to Classify Goods for Customs
Tariff classification is the cornerstone of customs compliance. Every imported or exported product must be assigned the correct code in the Harmonized System (HS), Combined Nomenclature (CN), or TARIC before it can clear customs. The code you choose determines duty rates, VAT, anti-dumping duties, licensing requirements, and trade policy measures. Getting it wrong can result in financial penalties, shipment delays, and legal liability. Whether you are a customs consultant advising clients, a compliance manager overseeing import operations, or new to customs classification, this guide walks you through the General Interpretive Rules (GIR 1-6), a step-by-step classification process, and how Celna24's AI-powered tools can accelerate your workflow.
What Is Tariff Classification?
Tariff classification is the process of assigning the correct customs code to goods within a structured nomenclature. In the EU this means finding the right 8-digit CN code (Combined Nomenclature), which is built on the international 6-digit HS code maintained by the World Customs Organization (WCO). The 10-digit TARIC code then adds EU trade measure specifics on top.
The classification you choose determines:
- Conventional (MFN) and preferential duty rates
- VAT rate applicable in the member state of import
- Anti-dumping and countervailing duties
- Licensing and certification requirements
- Tariff quotas and duty suspensions
- Import prohibitions and restrictions (dual-use goods, hazardous substances)
- CBAM obligations (Carbon Border Adjustment Mechanism)
- Rules of origin for preferential trade agreements
Classification is governed by the General Interpretive Rules (GIR), a set of six rules established by the WCO that must be applied in a strict sequential order. Responsibility for correct classification lies with the declarant — the importer, exporter, or their customs broker. Customs authorities verify the classification and may reclassify goods if they disagree, potentially triggering penalties and back-payments.
AI-Powered Classification — Celna24's Advantage
Traditional tariff classification requires deep expertise in the nomenclature, years of experience with the General Interpretive Rules, and access to extensive BTI databases. Celna24's AI classification wizard changes this by making expert-level classification suggestions available to anyone:
- AI Intelligent Search — describe your product in plain language (e.g., “industrial robot arm for welding, 6-axis, payload 20kg”) and our AI will suggest the most likely CN/TARIC codes ranked by confidence score.
- Trained on 85,000+ real BTI rulings — our machine learning models are trained on actual Binding Tariff Information decisions issued by EU customs authorities, not generic product descriptions.
- BTI examples for every suggestion — each AI result includes relevant BTI decisions showing how similar products have been officially classified, giving you real precedents to reference.
- Integrated duty calculator — once you have the code, calculate duty, VAT, and total import costs in one click without leaving the platform.
While AI dramatically speeds up the initial classification process, the results should always be verified against the official nomenclature text and the General Interpretive Rules. For goods where classification has significant financial impact, we recommend confirming the AI suggestion with a Binding Tariff Information (BTI) application.
The General Interpretive Rules (GIR 1-6)
The General Interpretive Rules are the legal framework that governs how goods are classified in the Harmonized System and, by extension, in the Combined Nomenclature and TARIC. The rules are applied sequentially — you start with GIR 1 and only move to the next rule when the previous one does not resolve the classification. Every customs consultant and compliance manager must understand these rules thoroughly.
GIR 1 — Headings, Section Notes and Chapter Notes
Classification is determined first and foremost by the wording of the headings and the relevant Section and Chapter Notes. Section and chapter titles are provided for ease of reference only and have no legal force. The Notes, however, are legally binding and may exclude certain goods, define specific terms, or extend the scope of a heading. GIR 1 resolves the vast majority of classification cases — estimated at over 90% of all goods.
GIR 2(a) — Incomplete or Unfinished Articles
Any reference to an article in a heading includes that article in an incomplete or unfinished state, provided it has the essential character of the complete article. This also covers articles presented unassembled or disassembled (e.g., a robot arm shipped in components is still classified as a robot arm).
GIR 2(b) — Mixtures and Combinations
Any reference to a material or substance in a heading includes mixtures or combinations of that material with other materials. Goods consisting of more than one material are classified according to GIR 3.
GIR 3(a) — Most Specific Description
When goods are classifiable under two or more headings, the heading providing the most specific description takes priority. For example, “medical examination gloves” (specific) takes precedence over “articles of vulcanised rubber” (general).
GIR 3(b) — Essential Character
Composite goods, sets, and mixtures that cannot be classified by GIR 3(a) are classified by the material or component that gives them their essential character. Essential character may be determined by the nature of the material, its bulk, weight, value, or the role it plays in the use of the goods.
GIR 3(c) — Last Applicable Heading
If neither GIR 3(a) nor GIR 3(b) resolves the classification, the goods are classified under the last heading in numerical order among those equally meriting consideration.
GIR 4 — Most Analogous Heading
Goods that cannot be classified under GIR 1 through 3 are classified under the heading appropriate to the goods to which they are most akin (analogous). This rule is rarely used and typically applies to novel products not yet covered by the nomenclature.
GIR 5 — Cases and Containers
Specially shaped or fitted cases and containers are classified together with the articles they are designed to contain. General-purpose packing materials and containers presented with the goods are also classified with them, unless they are clearly suitable for repetitive use.
GIR 6 — Subheading Classification
Rules 1 through 5 apply mutatis mutandis to subheadings within the same heading. Only subheadings at the same level are comparable (one-dash with one-dash, two-dash with two-dash). GIR 6 governs the narrowing from a 4-digit heading to a 6-digit HS subheading and then to an 8-digit CN code.
Step-by-Step Classification Process
Follow these steps to classify any product in the Combined Nomenclature. For customs consultants and compliance managers, this is the standard workflow that should be followed for every new product:
Step 1: Identify the Product
Prepare a precise description covering the product's material composition, function, end use, state (finished, unassembled, in parts), and degree of processing (raw, semi-finished, finished). The more detailed the description, the easier the classification. Include technical specifications, photographs, and material safety data sheets where available.
Step 2: Use AI to Get Initial Suggestions
Enter your product description into Celna24's AI Intelligent Search. The AI will return a ranked list of suggested CN/TARIC codes with confidence scores and real BTI examples. This provides a strong starting point and often identifies the correct code immediately, especially for common products.
Step 3: Find the Relevant Section (I-XXI)
Browse the 21 Sections of the Combined Nomenclature in the Customs Tariff to confirm the broad category. Remember: Section titles are for orientation only (GIR 1) — always read the legally binding Section Notes.
Step 4: Read Section and Chapter Notes
Section and Chapter Notes have legal force and override any heading text. They define which products are included or excluded, provide special definitions, and set classification criteria. Skipping the Notes is the most common and most serious classification mistake.
Step 5: Determine the Heading, Subheading, and CN Code
Apply GIR 1 to find the 4-digit heading, then use GIR 6 to narrow to the 6-digit HS subheading and 8-digit CN code. If the product could fall under multiple headings, apply GIR 3 (specificity, essential character, last heading) to resolve the conflict.
Step 6: Check TARIC for Trade Measures
The 10-digit TARIC code adds trade measures on top of the CN code — anti-dumping duties, tariff quotas, suspensions, and surveillance. Always verify your code in the TARIC database to identify any additional measures that apply.
Step 7: Calculate Duties with the Duty Calculator
Use Celna24's Customs Calculators to compute the exact import costs: conventional duty, preferential rate (if applicable), anti-dumping duty, VAT, excise, and total landed cost.
Common Classification Mistakes
Based on customs practice and BTI decisions, these are the most frequent errors made during tariff classification:
Classifying by Trade Name Instead of Technical Composition
The nomenclature does not classify goods by their brand or trade name. What matters is the material, function, and end use. A “power bank” is not a tariff heading — you need to determine whether it is a lithium-ion accumulator, a portable charger, or another type of device.
Ignoring Section and Chapter Notes
Section and Chapter Notes have legal force. They can exclude goods from a Chapter, define terms differently from everyday usage, or set specific criteria. Skipping the Notes is the most common cause of misclassification.
Using a General Heading When a More Specific One Exists
GIR 3(a) requires you to use the most specific description available. Choosing a catch-all or residual heading when a more precise one covers your product is incorrect and will be flagged in customs audits.
Not Checking Annual CN Updates
The Combined Nomenclature changes every year. Codes can be added, deleted, or rearranged. A code from last year may no longer exist or may now cover a different product. Always classify using the current version of the nomenclature.
Binding Tariff Information (BTI)
A Binding Tariff Information (BTI) is an official administrative decision issued by a customs authority that confirms the tariff classification of specific goods. In the EU, a BTI is legally binding across all 27 member states for a period of 3 years from the date of issue. It provides the highest level of legal certainty available for tariff classification.
A BTI is particularly valuable when dealing with:
- New or innovative products that may not fit neatly into existing headings
- Complex composite goods with multiple materials or functions
- High-value shipments where a duty rate difference could be significant
- Products where you have received conflicting classification opinions
- Products subject to anti-dumping duties where correct TARIC digits are critical
In the EU, BTI applications are submitted electronically through the EBTI system. You will need to provide a detailed product description, and including samples, technical data sheets, and photographs will help the customs authority reach a decision more quickly. The cost of applying for a BTI is typically zero or minimal, while the potential savings from correct classification can be substantial.
Tariff Classification Examples
The following products frequently pose classification challenges. Here are their correct CN codes, duty rates, and the classification reasoning:
| Product | CN Code | Duty | Classification Note |
|---|---|---|---|
| Industrial robot arm (6-axis) | 8479 89 97 00 | 1.7% | Machines with individual functions, n.e.s. (Ch. 84 Note applies) |
| Lithium battery pack (Li-ion) | 8507 60 00 00 | suspended | Lithium-ion accumulators; duty suspension supports EU green transition |
| Medical examination gloves (latex) | 4015 11 00 00 | 2.7% | Surgical/medical gloves of vulcanised rubber; GIR 3(a) — specific heading prevails |
These examples illustrate common classification dilemmas: the robot arm must be classified by function (not as a “motor” or “arm”), the lithium battery benefits from an EU duty suspension to support the energy transition, and medical gloves are classified under the specific medical heading (4015) rather than the general rubber articles heading. When in doubt, use AI-Powered Search or apply for a BTI decision.
Related Topics
- CN Code — the 8-digit Combined Nomenclature used in the EU
- HS Code Guide — the international 6-digit Harmonized System
- TARIC Guide — the EU Integrated Tariff (10 digits) with trade measures
- UK Commodity Code — 10-digit UK tariff code for post-Brexit trade