Get the commodity code wrong and everything downstream goes wrong with it: the duty rate, the import VAT, the licences you may need, even whether your goods can enter the country at all. A legally binding classification decision removes that guesswork. In the UK, binding tariff information is exactly what many importers search for — but the system you actually apply to now depends on where you trade. This guide explains what changed, which ruling covers Great Britain, and how to secure one before your goods move.
What “binding tariff information” means in the UK today
Historically, traders across the UK and EU relied on Binding Tariff Information (BTI) — a written decision from the customs authority confirming the correct commodity code for a specific product, legally binding on both sides. After Brexit the UK split this into two routes. If you import into Great Britain (England, Scotland, Wales), you apply for an Advance Tariff Ruling (ATaR). If you move goods in Northern Ireland or the EU, the BTI system still applies. The purpose is identical: a decision you can rely on, tied to one clearly described product.
BTI vs ATaR — which one applies to you
The dividing line is geography, not product type:
- Great Britain imports/exports → Advance Tariff Ruling (ATaR).
- Northern Ireland / EU movements → Binding Tariff Information (BTI), applied for through HMRC’s registration route for the EU Customs Trader Portal, which needs an XI EORI number.
Both give you a uniquely referenced, non-transferable decision — only the person legally entitled to use it can rely on it. If your supply chain touches both GB and NI, you may need separate rulings. A broker experienced in UK–Poland classification work can confirm which route fits each leg of your movement before you commit.
How to apply for an Advance Tariff Ruling
For Great Britain, HMRC runs ATaR through the online service. You apply either through your business tax account — by choosing “get online access to a tax, duty or scheme” — or directly via the ATaR application service if you do not have a business tax account. Either way you sign in with Government Gateway credentials. You describe the goods precisely: composition, function, and any technical detail that affects classification. Vague descriptions are the most common reason a decision is delayed or refused.
Crucially, you must apply before your customs procedures are complete. HMRC states that decisions cannot be made retrospectively, and it will not process an application from someone who has already cleared the goods or who is not actually planning to import them.
How long it takes — and how long it lasts
According to HMRC guidance, “HMRC will reply to your application in 30 to 120 days” for an Advance Tariff Ruling; for BTI, HMRC “aims to reply to your application within 120 days.” Build that lead time into your planning — a ruling is only useful if it lands before you need to declare.
Your decision states the start date for its period of validity. HMRC does not publish a single fixed duration on the application page, so check the validity period printed on your own ruling and confirm the current position on GOV.UK rather than relying on figures from third-party sites. If a rate or classification basis changes, a ruling can be affected — so treat it as authoritative for your product, but stay alert to updates.
When a ruling won’t help you
An ATaR or BTI decision is powerful but narrow. It covers the exact product described, for the party named, and only when applied for in time. It will not fix a code retrospectively, it does not transfer to another company, and it is not a substitute for accurate declarations at the border. Pair it with correct customs procedure codes and complete documentation so the binding classification actually flows through to your entry.
Checklist: getting a binding UK classification decision
- Confirm your route: ATaR (Great Britain) or BTI (Northern Ireland / EU).
- Hold a valid EORI and Government Gateway sign-in before you start.
- Write a precise product description — composition, function, technical specs.
- Apply before customs procedures are completed (no retrospective decisions).
- Allow 30–120 days for a reply and plan shipments around it.
- Record the reference and the start date of validity from your decision.
- Check current rules on GOV.UK; verify any duty figure against the UK Trade Tariff.
Mini-FAQ
Is binding tariff information still available in the UK? Yes, but split by location: Great Britain uses the Advance Tariff Ruling (ATaR), while Northern Ireland and the EU continue to use BTI.
How long does an Advance Tariff Ruling take? HMRC states it will reply in 30 to 120 days, so apply well ahead of shipping.
Can I get a ruling after my goods have arrived? No. HMRC does not make decisions retrospectively and will refuse applications where the goods have already cleared customs.
Is a ruling transferable to another company? No. Decisions are non-transferable and can only be used by the person legally entitled to them.
Sources (gov.uk): Apply for an Advance Tariff Ruling; Apply for a Binding Tariff Information decision.
