T1 vs T2 Transit Declarations: What's the Difference?

T1 vs T2 Transit Declarations: What's the Difference?

If you move goods through the UK, the EU or any of the other Common Transit Convention (CTC) countries, sooner or later you will be asked to lodge either a T1 or a T2 transit declaration. The two look similar in NCTS but cover very different situations — and getting it wrong can lead to delayed shipments, customs debt and enquiry procedures.

This guide explains what each one means, when to use it, and what the practical paperwork looks like.

What Is a Transit Declaration?

A transit declaration places goods under a customs procedure that allows them to move between countries under continuous customs supervision, without paying import duty or VAT at every internal border. The duty becomes payable only if the goods are diverted into free circulation — for example, sold inside the EU rather than moved through it.

Two key declaration types exist under the Common Transit Convention:

• T1 — for "external" transit
• T2 — for "internal" transit

Both are now lodged electronically through NCTS (the New Computerised Transit System), in its current Phase 5 release (NCTS5).

T1 Transit Declarations — External Transit

A T1 is used to move goods that have not (yet) been released into free circulation in the EU customs territory. In practice this typically covers:

• Goods imported from outside the EU and moving onward under customs supervision (for example, goods arriving at Rotterdam destined for Germany via Belgium without being cleared at the first port)
• Goods leaving an EU customs warehouse for export through another EU member state
• Goods moving from the UK to the EU (or vice versa) where they have not yet been cleared into either customs territory

Because the goods are not "free circulation" goods, the customs debt that would arise if they were diverted is potentially significant — so a T1 movement almost always requires a financial guarantee.

T2 Transit Declarations — Internal Transit

A T2 is used to move Union goods (or goods of equivalent status) under continued customs supervision between two points where this supervision is required. The most common scenarios are:

• Goods moving between the EU mainland and certain EU enclaves (for example, San Marino, the Channel Islands or specific tax territories)
• Goods crossing non-Union territory while keeping their Union status (the classic "Switzerland transit" between EU member states)
• Movements in specific bilateral arrangements where T2 is required by law

T2 is essentially a way to prove and protect Union status during a movement, rather than placing non-Union goods under temporary supervision.

The Practical Difference at the Border

For the driver and haulier, the day-to-day paperwork looks almost identical:

• A TAD (Transit Accompanying Document) printed from NCTS travels with the goods
• The TAD carries an MRN (Movement Reference Number) as a barcode
• At every office of transit and the office of destination, the MRN is scanned and the movement progressed in NCTS

What changes is the risk and guarantee profile, the commodity classification (in some cases) and the discharge requirements behind the scenes.

Common Mistakes We See

In our day-to-day work with hauliers and freight forwarders, the most common errors are:

1. Wrong declaration type — issuing a T1 where the goods clearly retain Union status, or a T2 where the goods are non-Union (this is the single biggest cause of NCTS rejections in our experience).
2. Insufficient guarantee — using a comprehensive guarantee with no remaining headroom, or no guarantee at all where one is required.
3. Misaligned office of destination — the declared office of destination does not match the actual route, leading to "no arrival" enquiries.
4. Late discharge — the movement reaches its destination but is not properly presented to customs, leaving the MRN open and the guarantee blocked.

How We Help

Whether you need a T1 or a T2, we lodge the declaration directly into NCTS5, generate the TAD, manage the guarantee and stay in touch through the office of departure → transit → destination lifecycle. If a movement runs into trouble — diversion, late arrival, enquiry — we deal with HMRC and the relevant EU customs offices on your behalf.

If you are not sure which declaration type your shipment needs, contact us with the route and goods information — we will tell you, and lodge it the same day.