What Is a Commodity Code?
A commodity code is a number that classifies a product for customs purposes. In the UK, commodity codes are based on the international Harmonised System (HS) developed by the World Customs Organisation, extended to 10 digits for UK trade.
The correct commodity code determines:
- The rate of customs duty payable on import
- Whether import or export licences are required
- Eligibility for preferential duty rates under trade agreements
- Whether trade remedies (anti-dumping or countervailing duties) apply
- VAT treatment in some cases
The Structure of a UK Commodity Code
A full UK commodity code has 10 digits, structured as follows:
- Digits 1-2: Chapter (broad product category — e.g., 09 = coffee, tea, spices)
- Digits 1-4: Heading (more specific category)
- Digits 1-6: Subheading (international HS code, used globally)
- Digits 1-8: Combined Nomenclature (CN) code (EU-aligned)
- Digits 1-10: Full UK commodity code (UK-specific subdivisions)
How to Find the Right Commodity Code
Finding the correct commodity code requires working through the UK Global Trade Tariff — a classification system organised into 21 sections and 97 chapters.
The classification process involves:
Step 1: Section and Chapter Identify the broad category of your product. For example, textiles are in Section XI (Chapters 50-63).
Step 2: Heading Within the chapter, find the heading that best describes your product. Read the chapter notes carefully — they define what is and is not included.
Step 3: Subheading Refine to the 6-digit subheading level, then to 8 digits and 10 digits.
Step 4: Check the duty rate and any conditions Once you have a code, check the applicable duty rate, any preference rates available, and any licensing requirements.
Common Classification Mistakes
Classifying by material rather than function The HS prioritises the function of a product over its material composition in many cases. A steel tool is classified as a tool, not as steel.
Using a previous code without checking for updates The UK Tariff is updated annually. Codes can be changed, merged, or split. Always verify that the code you are using is current.
Relying on descriptions rather than the legal text The legally binding classification is determined by the tariff schedule text and the General Rules of Interpretation — not by product descriptions provided by suppliers.
Applying the wrong chapter when goods could fit several The General Rules of Interpretation provide a hierarchy for resolving classification disputes. Knowing these rules is essential for accurate classification.
Binding Tariff Information (BTI)
If you are uncertain about the correct classification for your goods, you can apply to HMRC for a Binding Tariff Information (BTI) ruling. A BTI is a written decision from HMRC confirming the correct commodity code for a specific product.
A BTI provides legal certainty — HMRC is bound by the ruling, and you can rely on it for customs clearance purposes. However, BTIs are product-specific and cannot be used for similar but different products.
The Consequences of Misclassification
Incorrect commodity codes can lead to:
- Underpayment of duty — HMRC can issue post-clearance demand notices (C18) going back up to 3 years (10 years for fraud)
- Overpayment of duty — you may be paying more than necessary
- HMRC penalties — for negligent or deliberate misclassification
- Import/export licence violations — if a controlled goods code was missed
- Supply chain disruption — goods held at customs pending reclassification
Summary
Commodity code classification is one of the most technically demanding aspects of customs compliance. It requires knowledge of both the tariff schedule and the specific characteristics of your products. Our classification specialists are available to review your product range, assign accurate codes, and provide written classification rationales for your records.