A lorry booked for the port, stock ready to dispatch and a commercial invoice prepared can still be held up by one missing detail: the correct EORI number. Knowing how to obtain an EORI number before your first shipment is a straightforward but essential part of setting up for customs. It identifies your business to customs authorities and is used throughout the declaration process.
For UK and Ireland businesses, the detail matters. The EORI number you need depends on where your business is established, where goods are moving and whether Northern Ireland is involved. Getting this right early helps you avoid declaration rejections, last-minute clearance issues and unnecessary pressure on your transport team.
What an EORI number does
EORI stands for Economic Operators Registration and Identification. It is the reference number customs authorities use to identify a business involved in importing or exporting goods. Your EORI is entered on customs declarations and may also be needed for related border processes, including safety and security filings or transit movements.
Think of it as the customs identity for your business. It is not a replacement for a VAT number, a commodity code, a deferment account or an authorisation. Each has a separate role. However, an EORI number is often the first item a customs agent, freight forwarder or declaration system needs before goods can be cleared.
The business named as importer or exporter on the declaration should normally use its own EORI. Even where a customs agent completes the declaration on your behalf, the declaration is being made for your business and its customs responsibilities still need to be clear.
How to obtain an EORI number in Great Britain
A business established in England, Scotland or Wales that imports into or exports from Great Britain will usually need an EORI number beginning with GB. Apply through HMRC before goods move. Do not wait until the collection date or until a shipment has reached the border.
The application is completed online. You will be asked for information that enables HMRC to identify the business and understand its trading activity. This can include your business name and address, company registration details where applicable, VAT registration details or Unique Taxpayer Reference, contact details, and information about the type and expected value of goods you trade.
Make sure the legal entity on the application matches the entity that will buy, sell, import or export the goods. This is particularly relevant for group companies, sole traders and businesses using a trading name. A mismatch between the EORI holder, the invoice and the declaration can create questions at clearance stage.
HMRC advises allowing time for the number to be issued. Many applications are processed quickly, but customs planning should never depend on same-day approval. Apply before you commit to a first import or export, and keep the confirmation safely with your customs records.
Check whether you already have a GB EORI
Before applying, check whether your business has already been assigned one. This is worth doing if you are VAT registered, have traded internationally before, or have changed staff, systems or customs agents. Duplicate applications create avoidable administration and can leave teams using inconsistent reference data.
Your finance, procurement and logistics teams should all hold the same verified EORI information. It should also be configured correctly in your customs software and shared with the agent processing any declarations for you.
Northern Ireland: when an XI EORI may be required
Northern Ireland has specific customs arrangements, so a GB EORI is not always enough. Businesses involved in certain movements between Northern Ireland and the EU may require an EORI number beginning with XI. This is commonly relevant where the business needs to make customs declarations or use EU customs systems for Northern Ireland-related trade.
The exact requirement depends on the movement and your role in the supply chain. For example, sending goods from Great Britain to Northern Ireland, moving goods from Northern Ireland into the EU, or acting as the importer of record can produce different declaration and identification requirements.
Do not assume that an XI number replaces a GB number in every scenario. Some businesses need both, particularly where their operations span Great Britain, Northern Ireland and EU markets. Confirm the required identifier against the actual goods flow before setting up a shipment or instructing a carrier.
EORI registration for businesses established in Ireland
A business established in the Republic of Ireland should arrange its EORI registration through Revenue. Irish businesses generally use an EORI beginning with IE for customs activity. Registration and access arrangements are managed through Revenue systems, including ROS where relevant.
This distinction is important for traders on the UK and Ireland corridor. An Irish business importing goods into Ireland needs the appropriate Irish customs identification. A UK supplier exporting to Ireland needs its own UK EORI for the UK export side. One party's EORI does not cover the other party's customs obligations.
Where a business is established outside the UK or EU, the position can be more complex. The place of establishment, the customs procedure, the importer of record and the type of representation used by the customs agent all affect which EORI is needed. In that situation, obtain advice before goods are shipped rather than trying to correct the structure after arrival.
Information to prepare before you apply
The EORI application itself is not difficult, but accuracy matters more than speed. Have your core business details available and check them against the documents used in your supply chain. That means invoices, purchase orders, transport instructions, VAT records and company registration details should point to the same legal entity.
It is also sensible to establish the basics of your customs process at the same time. Identify who will make import and export declarations, who will pay or account for duty and import VAT, and who will provide commodity codes, customs values and origin information. An EORI number allows the declaration to identify you, but it does not answer those other customs questions.
If you are planning regular trade, record the number in a controlled master-data process rather than relying on it being copied into emails. One incorrect digit in a declaration can lead to a rejection or a clearance query at the point goods need to move.
Common EORI mistakes that delay goods
The most common issue is applying too late. A number may be needed before the declaration can be submitted, so a shipment booked before registration is complete creates an avoidable risk.
Another is using the wrong entity's EORI. This happens when a parent company, warehouse operator, freight forwarder or overseas supplier is named by mistake. The right answer depends on who is acting as importer or exporter and how the customs declaration is structured.
Businesses also sometimes confuse the EORI with a VAT number. Although the references can be related, they are not interchangeable. Enter the EORI where the customs system requests an EORI, and ensure the VAT treatment for the import is considered separately.
Finally, an EORI should not be treated as a one-off compliance task. If your company changes legal structure, address, VAT status or trading footprint, review the data held by customs authorities and the information stored in your declaration system. A change that seems administrative can affect how declarations are accepted and audited.
Put the EORI into a workable customs process
Once issued, provide your EORI to the people and systems that need it: your customs agent, freight forwarder, carrier where requested, and internal declaration team. Limit access to approved users, but make sure it is available when operational staff are preparing shipment data.
For businesses processing declarations in-house, build validation into the workflow. The EORI should be linked to the correct declarant and trader roles, while other declaration data is checked before submission. This reduces rekeying and gives staff a clearer audit trail when a query arises.
The right operating model depends on your shipment volumes and in-house knowledge. Some businesses choose to outsource declarations while they establish their procedures. Others use customs software to process declarations in-house, supported by training and expert help for unusual movements. A hybrid approach can work well when routine imports are frequent but specialist trade still needs review.
Custran supports that practical approach across UK and Ireland customs activity, combining declaration software with agency processing, training and operational support when teams need an extra pair of experienced hands.
An EORI number is a small piece of data with a large operational impact. Apply early, verify the number against the trade route, and make it part of a controlled declaration process. That gives your team a better chance of keeping goods moving when the pressure is on.