EORI Number Explained: GB, XI, and Who Actually Needs One

EORI is searched around 14,800 times a month in the UK, with another 6,600 looking specifically for how to check one — a figure that says a good deal about how often a supplier's number turns out to be wrong. HMRC owns the application form and should: this guide covers the parts the form does not answer. Whether you need one at all, why there are two prefixes, what to have in front of you before you start, and what it costs you when goods are already moving and the number is not there.

What is an EORI number and what is it for?

An EORI number is an Economic Operators Registration and Identification number: a single reference that identifies a trader to customs across every declaration they make. It identifies the party, not the goods and not the movement — which is the distinction that makes sense of everything else. One EORI covers every consignment you ever declare; an MRN covers one declaration, and a GMR covers one vehicle crossing. HMRC issues it, and the gov.uk application covers movements between Great Britain, Northern Ireland or the Isle of Man and other countries. Our EORI glossary entry gives the short definition.

Do you actually need one?

You need an EORI number if you move goods between Great Britain and another country, and specifically a number starting GB. The test is whether you are named on a customs declaration, not whether you think of yourself as an importer — which catches people out. Three cases that surprise people: a UK business buying from abroad on DDP terms may still be named as importer; a sole trader selling internationally needs one as much as a limited company; and a business outside the UK that imports into GB in its own name needs a GB EORI even with no UK establishment. If you are moving goods only between two UK addresses, you need nothing at all — see arranging a UK delivery from overseas.

What is the difference between a GB and an XI EORI number?

The prefix follows the territory, and you may need both.

HMRC operates separate application forms for GB and XI, so holding one does not get you the other. The XI route has its own eligibility check before you apply.

What do you need to hand before applying?

Four or five items depending on who you are, and gathering them first turns a stalled application into a short one. (1) Your Standard Industrial Classification code, which is on the Companies House register for your own company. (2) Your VAT number and the effective date of registration, both on the VAT registration certificate — the date is the field most often guessed wrong. (3) Your Unique Taxpayer Reference. (4) A National Insurance number, if you are an individual or a sole trader. A business not based in the UK does not need a UTR or a SIC code, which removes the commonest blocker for an overseas applicant.

How long does an EORI application take?

Usually immediate, and up to 5 working days where HMRC needs to run checks on the application. That gap is the planning risk rather than the number itself: a consignment booked for Tuesday on the assumption of an instant number can sit while a check runs. Two practical responses. Apply before you have a shipment rather than alongside one — there is no cost or obligation in holding an unused EORI. And if you are importing through an agent, confirm which EORI will appear on the declaration before the goods move, because an agent cannot invent one for you.

What does an EORI number look like?

A GB EORI is the prefix GB followed by a twelve-digit identifier; for a VAT-registered business that identifier is normally built from the VAT registration number with three trailing digits. The practical use of knowing the shape is validation: a number that is the wrong length or lacks the territory prefix will fail at declaration rather than at the border, which is a slower and more expensive place to discover it. If you want certainty rather than a pattern match, use the gov.uk checking services rather than inferring the number from a VAT certificate yourself.

How do you check whether an EORI number is valid?

Through HMRC's own checker, and the volume of people searching for it — `check eori number` is searched around 6,600 times a month in the UK — says something about how often a supplier's number turns out to be wrong. Check it in two situations: before you name a counterparty as importer or exporter on a declaration, and when a declaration is rejected and you are working backwards through the fields. A valid-looking number belonging to a dissolved company behaves exactly like an invalid one. For a counterparty you do not know, the EORI check and a Companies House look-up together are worth the five minutes.

Is an EORI number the same as a VAT number?

No, and conflating them is the most expensive misunderstanding in this area. A VAT number registers you for a tax; an EORI number identifies you to customs. The confusion is understandable because a GB EORI for a VAT-registered business is derived from the VAT number, so they look related — but a business can hold one without the other. You can be VAT registered with no EORI, which blocks your first import, and you can hold an EORI while not VAT registered, which HMRC provides a separate application form for. Our EORI versus VAT entry separates them field by field.

Does an Incoterm decide who needs the EORI?

No. The Incoterm allocates who should handle clearance; customs law decides who must hold a number to do it. The two come apart most often on DDP, where a seller agrees to clear goods into the buyer's country and then discovers it needs an EORI and a VAT registration there. Prefer DAP and let the buyer clear with their own number, unless you genuinely hold registrations at the far end. We cover the whole set in Incoterms 2020 explained, and the contract-drafting consequences there rather than here.

What else does an EORI unlock?

It is a prerequisite rather than an endpoint, and three downstream systems will not accept you without it.

So an EORI application is the first step in a chain, not a one-off form. See GVMS and the GMR explained and NCTS explained.

What happens if you ship without one?

The declaration cannot be made, so the goods stop — and they stop somewhere expensive. In practice the consignment sits at a port or an airport cargo shed accruing storage while someone applies for a number that takes up to 5 working days to issue if a check runs. The cost is rarely the duty; it is the storage, the missed delivery slot and sometimes a return leg. This is also why a carrier cannot rescue you: we move goods and present documents, we are not the declarant and cannot hold an EORI on your behalf. See customs broker for who can.

Do individuals and sole traders need one?

Sole traders yes, private individuals generally no — and the line is commercial purpose rather than company structure. A sole trader importing stock is an economic operator and needs an EORI exactly as a limited company does, supplying a National Insurance number in place of a company's details. A private individual receiving a personal parcel does not, because the courier or the seller handles the declaration. The grey zone is the hobby seller crossing into trading volumes, where the honest answer is that if you are importing to resell, you are trading.

What should an overseas business know before applying?

That it is possible without a UK presence, and simpler than most assume. A business not based in the UK does not need a Unique Taxpayer Reference or a SIC code — two of the items that otherwise come from Companies House — which removes the usual objection that you cannot apply without a UK company. What you do need is to decide who is named on the declaration: your own entity with a GB EORI, or a UK buyer or agent with theirs. Deciding that before the goods move is the difference between a smooth first import and an expensive education. For a movement entirely inside the UK, none of this applies at all.

Where does the carrier fit?

Outside the EORI entirely, and it is worth being blunt about it. T&C Logistics moves goods and carries documents; we do not act as declarant, do not submit to CDS and cannot hold or use an EORI on your behalf. Clearance is coordinated through partner customs agents. Goods in transit are insured to £50,000 on our own vehicles and up to £1,000,000 via partner carriers, with public liability cover of £1,000,000 — carrier liability, which is a different thing from duty exposure. Our European road freight and international shipping pages cover the transport, and terms the cover.

Can one business hold more than one EORI number?

Yes, and larger traders routinely do — one per territory where they have customs activity. A UK group importing into both Great Britain and Northern Ireland holds a GB and an XI number; a group with an EU subsidiary holds that member state's number as well. The failure mode is not holding several but using the wrong one on a declaration, which produces a rejection that reads as a system error rather than as a data error. Keep a single list of which number belongs to which entity and territory, and give the agent the one that matches the direction of the movement rather than the one you used last time.

What happens to your EORI if the business changes?

It follows the legal entity, so a change of entity means a change of number — and this catches people mid-restructure. A change of trading name, address or telephone number is an amendment to the existing registration, and HMRC takes those on a form. A genuinely new entity, however created, is a new economic operator and needs its own EORI, and the old number does not transfer with the goodwill. Two practical consequences: do not let a declaration be made under a dissolved company's number, and if you are mid-transition, confirm which entity is named on the entry before the goods leave.

How does the EORI sit alongside the other references on one journey?

Four references, one journey, and only the first belongs to you rather than to the movement.

A driver can be carrying all four at once. Each is covered in its own guide: GVMS and the GMR, NCTS and transit, and the GMR glossary entry.