What is a T1?
A T1 transit document is a customs movement document issued under the Common Transit Convention (CTC). It allows goods that are not in free circulation in the destination customs territory to be transported between CTC contracting parties without paying import duty or VAT at each border crossing.
In practice, a T1 is what allows a truck full of Turkish electronics, Asian textiles or US machinery to enter the EU at one port, drive through several Member States, and exit to the UK — without clearing customs at every internal border. Customs duty and VAT are only paid once the goods are released into free circulation at the office of destination.
Who can issue a T1?
Only an authorised trader holding a valid transit guarantee can lodge a T1 declaration on the NCTS (New Computerised Transit System). In practice, this means you go through:
- a customs broker / freight forwarder with NCTS access; or
- a haulier authorised as a consignor; or
- (rarely) yourself, if your business holds NCTS authorisation and a comprehensive guarantee.
For most importers, working with a specialist broker is faster and removes the need to put up your own guarantee.
What information goes on a T1?
A T1 declaration on NCTS Phase 5 typically requires:
- Consignor (sender) and consignee (recipient) details with EORI numbers
- Office of departure (where the movement starts) and office of destination (where it ends)
- Itinerary — listing the customs offices to be crossed
- Goods description, commodity code, gross and net weight
- Number and type of packages, container numbers if applicable
- Total invoice value and currency
- Means of transport (vehicle plate, trailer plate)
- Transit guarantee reference number (GRN)
- Seals affixed to the vehicle or container
When the declaration is accepted, NCTS generates a Movement Reference Number (MRN) and the Transit Accompanying Document (TAD), which must travel with the goods.
How does the movement work in practice?
- Lodge declaration: The broker submits the T1 to NCTS at the office of departure. MRN is issued.
- Office of departure release: Customs accept the declaration and release the goods for transit. The TAD (with a barcode for the MRN) is printed and handed to the driver.
- Itinerary: The truck travels through the planned route. At each intermediate border, customs scan the barcode and confirm transit.
- Office of destination: The truck arrives at the customs office shown as the destination. The carrier presents the TAD and customs records the arrival in NCTS.
- Discharge: If everything matches, NCTS closes the movement. The transit guarantee is released and the goods can now be entered into free circulation (with a separate import declaration).
Common reasons a T1 fails
- Incorrect or missing office of destination — the truck cannot be released
- Itinerary does not match actual route → diversion request needed
- Seal numbers do not match the declaration
- Driver bypasses the office of destination — opens a customs debt against the guarantee
- Late discharge — automatic enquiry initiated by HMRC or EU customs
A specialist broker monitors movements in NCTS in real time and intervenes before any of these escalate into a costly enquiry.
When you need a T1
You need a T1 whenever non-Union goods are moving:
- From a non-Union country (e.g. Turkey, China, USA) through the EU to the UK
- From the UK through the EU to another country
- Between two UK locations under transit (e.g. inland clearance from port to a customs warehouse)
- Between the EU and another CTC contracting party (Norway, Switzerland, Iceland, etc.)
If you are moving Union-status goods only through Union territory, transit is generally not required. If you are unsure, our team can review your movement and tell you whether you need a T1, T2 or no transit declaration at all.
Need help with a T1?
We lodge T1 transit declarations on NCTS, provide the comprehensive guarantee, monitor the movement from departure to discharge and step in immediately if anything goes wrong en route. Most T1s are issued within the hour. Get in touch for a quote.