Commodity Code Guide for UK Importers and Exporters

A commodity code can change the landed cost of a shipment before it has even left the supplier’s warehouse. This commodity code guide explains how UK businesses can classify goods correctly, avoid preventable customs delays and build accurate duty, VAT and freight costs into their buying decisions.

For an importer, the code affects the customs duty rate, import controls and potential reliefs. For an exporter, it can determine whether licences, certificates or destination-country restrictions apply. A code that looks close enough can still be wrong, particularly for goods with mixed materials, specialist functions or multiple components.

What is a commodity code?

A commodity code is the number used to identify goods for customs and international trade purposes. It is based on the Harmonised System, usually called the HS system, which is used internationally to classify products by their nature, material, purpose and level of processing.

In the UK, imports generally require a 10-digit commodity code. Exports commonly use an eight-digit code. The first six digits are broadly recognised internationally, while the remaining digits provide the additional detail required for UK and destination-market customs treatment.

The description on a commercial invoice is not a substitute for a commodity code. Describing goods as “parts”, “samples”, “equipment” or “clothing” may help a carrier understand the consignment, but it is rarely specific enough for a customs declaration. Customs authorities need to know what the goods are, what they are made from, how they work and, in many cases, what they are intended to do.

Why the right code matters to your shipment

Correct classification is a cost-control issue as much as a compliance task. The commodity code determines the duty rate applied to the customs value of the goods. It may also identify whether import VAT applies in the usual way, whether a quota is available, or whether anti-dumping duties and other trade measures apply.

The operational impact can be just as significant. Certain foods, animal products, chemicals, medicines, timber products, electronics and controlled goods may require additional checks or supporting documents. If the declared code does not match the cargo, customs may query the entry, hold the goods or amend the classification. This can result in storage, demurrage or delivery delays, depending on the mode of transport and location of the freight.

For exporters, classification supports accurate export declarations and helps overseas customers assess their own import duties. It also plays a part in screening goods against sanctions, export controls and licensing requirements. This is particularly relevant for technology, machinery, components and goods with potential military or dual-use applications.

A lower duty rate should never be the reason for selecting a code. Classification must reflect the product itself. Choosing a code because it appears commercially favourable creates exposure to reassessments, penalties and disrupted supply chains.

Commodity code guide: how to classify goods correctly

Start with the product, not the wording your supplier happens to use. Supplier catalogues and overseas invoices can be useful evidence, but the supplier’s HS code may not provide the level of detail needed for a UK declaration. It may also have been selected for another country’s tariff schedule.

Build a complete product description

Before searching for a code, collect the facts that distinguish the item from similar products. For most commercial goods, this includes the product name, its intended use, principal material, composition by percentage where relevant, technical specification, method of operation and whether it is complete or a part.

For example, “steel fitting” is too broad. Is it a threaded pipe fitting, a structural component, a vehicle part or a furniture fitting? “Electronic device” is also inadequate. Customs classification can depend on whether the item measures, transmits, records, controls or simply supplies power.

Photographs, product data sheets, material safety data sheets, drawings and user manuals can all help establish the correct classification. For textiles, include fibre percentages. For food products, provide ingredients and processing details. For machinery and electrical goods, the function is usually more important than the trade name.

Follow the tariff structure, not just a keyword search

Commodity codes sit within chapters, headings and subheadings. A keyword search can provide a useful starting point, but it does not make the result correct. Similar terms may appear in several chapters because the tariff separates goods by material, function, industry use or degree of manufacture.

Read the legal notes for the relevant section and chapter, then compare the product against the wording of the possible headings. Classification rules help determine whether a mixed or composite product should be classified by its essential character, its main material or as a separate item.

This is where common errors arise. A rechargeable torch, for instance, is not classified simply as a battery product because it contains a battery. Its principal function is illumination. Likewise, a kit sold as one retail set may need a different approach from its individual components.

Check measures attached to the code

Once a likely code has been identified, check what it triggers. The duty rate is only one part of the picture. Review whether the goods are subject to licensing, health controls, product safety requirements, sanctions restrictions, quotas, anti-dumping measures or documentary evidence requirements.

Origin should also be checked separately. Commodity code and origin are connected in the customs declaration, but they answer different questions. The code identifies what the goods are; origin identifies where they are deemed to have been made under the relevant customs rules. Goods shipped from China via a European warehouse do not automatically gain EU origin.

Where a UK trade agreement may offer reduced or zero duty, eligibility depends on satisfying the agreement’s rules of origin and holding the right evidence. Preferential duty cannot be claimed merely because the supplier is based in the partner country.

Keep a classification record

For repeat imports or exports, maintain a record of each approved commodity code. Include the full product description, technical evidence, supplier details, country of origin, date checked and the reasoning behind the decision. This makes declarations faster and more consistent when different members of the team arrange shipments.

Review codes when the product changes, even if the change appears minor. A new material, upgraded specification, additional function or revised product bundle can alter the classification. Tariff measures can also change, so established codes should be checked periodically rather than copied indefinitely.

Codes for parts, samples and replacement items

Parts are one of the most misunderstood categories. A part is not automatically classified with the finished product it is used in. Some tariff headings specifically cover parts, while others exclude general-use items such as screws, springs, fasteners or electrical components. The correct answer depends on the product’s design, whether it is solely or principally used with a particular machine, and the applicable chapter notes.

Commercial samples also require classification. Their low value, promotional purpose or lack of resale value does not remove the requirement for an accurate commodity code. There may be reliefs in specific circumstances, but these should be assessed before shipment rather than assumed at clearance.

Replacement goods need the same care. A replacement component sent under warranty can still attract duty and VAT unless a relevant customs procedure or relief is available and correctly used. The commercial invoice should explain the transaction clearly, but the classification remains based on the goods themselves.

When to seek classification support

Straightforward, regularly traded goods may be manageable in-house once a clear product record is available. More complex goods deserve a closer review before the shipment is booked. This includes assemblies, machinery, chemicals, food, textiles, medical items, electrical equipment, high-value products and goods that might be controlled.

The cost of checking early is usually modest compared with correcting a declaration after arrival. A freight forwarder can review invoice descriptions and supporting documents alongside the planned route, while a customs specialist can help identify the practical implications of a proposed classification. For high-risk or high-volume products, a formal tariff classification decision may be appropriate.

At Milky Way Logistics, we coordinate customs documentation with the chosen air, sea, road or multimodal service, helping customers provide the detail needed for accurate declarations before cargo moves.

Prepare the information before requesting a freight rate

When requesting a freight quotation, supply a clear description of the goods and the commodity code where known. Include the origin, value, quantity, Incoterms, collection and delivery points, packaging dimensions and any dangerous-goods details. This allows duty and VAT considerations, documentation needs and carrier restrictions to be identified alongside the transport cost.

If the code is uncertain, say so. It is far better to resolve a classification question before cargo reaches a port, airport or border. A properly described product, supported by evidence and checked against the tariff, gives your shipment the best chance of clearing promptly and arriving with costs under control.