What Is a GB EORI Number? Guide For US Shippers

GB EORI Number An EORI beginning with GB that is generally needed to import goods into or export goods from Great Britain. This identifier links a business to its customs records for movement of goods to and from Great Britain after the UK left the EU. American exporters, freight forwarders, and 3PLs that trade directly with Great Britain use the GB EORI Number in customs declarations, in communication with HM Revenue & Customs (HMRC), and on shipping documentation where required.

Although the letters "GB" are fixed, the rest of the identifier is an alphanumeric code assigned by the UK customs authority. For many US-based organisations the GB EORI Number is an administrative prerequisite before a freight arrives in Great Britain or before goods are exported from Great Britain to the United States. It acts as the single reference HMRC uses to check trader status, duties, VAT registration links, and any associated authorisations such as an Economic Operator Authorisation or AEO status.

Why The Identifier Exists

The UK requires a consistent identifier so customs systems can associate declarations, duty calculations, licences, and any audit activity with the right legal entity. After Brexit, businesses dealing with Great Britain cannot rely on an EU-issued EORI to appear in UK databases. A GB EORI Number signals to border systems that the trader is known to HMRC and that the trader can be assessed for import VAT, customs duty, and any applicable controls such as sanitary or phytosanitary checks.

Who Needs One

Not every party in a supply chain needs to have a GB EORI Number, but at least one party responsible for customs formalities (importer of record or exporter of record) must have one when goods cross the UK border. Common scenarios:

• UK-based importers or exporters: Must have a GB EORI to transact with HMRC for declarations and duty payments.
• Non-UK businesses with a UK presence: Branches, subsidiaries or VAT-registered offices trading with GB should register for a GB EORI.
• Foreign traders without UK establishment: If they act as importer/exporter of record in customs declarations they will need a GB EORI; otherwise their UK agent or customs representative will use its own GB EORI.

How It Appears In Practice

A typical GB EORI Number begins with GB followed by up to 12 characters (often the company's VAT number or a unique HMRC allocation). You will see the GB EORI on commercial invoices, import/export declarations (customs entries), and in electronic messages between carriers and customs systems (e.g., CHIEF or CDS interfaces previously or currently used by HMRC). When a US freight forwarder submits a declaration, the GB EORI identifies who is responsible for duties and applicable controls.

Common Pitfalls For US Operators

• Assuming EU EORI Suffices: An EU-issued EORI starting with an EU member-state prefix does not replace a GB EORI for transactions involving Great Britain.
• Wrong Party Registered: Using the seller's EORI when the buyer is the importer of record leads to mismatched records and possible hold-ups at the border.
• Delays In Application: Applying too late can block customs clearance—apply well before first movement to GB.

Practical Example

A midwest US manufacturer sells components to a UK assembler and agrees the UK buyer will be the importer of record. The UK buyer must provide their GB EORI Number to the shipper and freight forwarder before arrival so the forwarder can lodge the import declaration under the buyer's GB EORI. If the buyer does not have a GB EORI, the forwarder can lodge under its own EORI where authorised, but that creates accounting and duty payment implications that must be agreed in advance.

Tips For Smooth Use

• Verify Up Front: Ask trading partners for their GB EORI early in the onboarding process and store it in your WMS/TMS and accounting system.
• Match To VAT Records: Where possible, check the EORI against VAT registration numbers; this reduces rejection risk in automated checks.
• Use A Representative Carefully: If a customs agent declares on your behalf, formal authorisations and clear contractual responsibility should be documented.

In short, the GB EORI Number is the basic customs identifier the UK uses to link a trader to its import/export records. For US shippers and carriers, confirming which party will use a GB EORI and ensuring it is present on declarations and shipping paperwork will avoid most common border delays.