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NCTS & CTC Updates27 February 2026

The Common Transit Convention: A Practical Overview

What the CTC Is — and Isn't

The Common Transit Convention (CTC) is the multilateral agreement that lets goods move under one customs transit procedure across the customs territories of its contracting parties. In day-to-day operations, it is the legal source of T1 and T2 transit declarations, the New Computerised Transit System (NCTS), and the Comprehensive Guarantee model.

The CTC is not a free trade agreement. It does not change the duties payable on goods — it only changes how and when those duties are accounted for during cross-border movements. Goods still need to be classified, valued and ultimately cleared at the destination; the CTC simply lets them move there without paying duty at every intermediate border.

Who Is In and Who Is Out

The contracting parties to the CTC currently include:

  • The United Kingdom
  • All EU member states (the EU as a single customs territory is a contracting party)
  • The EFTA states: Norway, Iceland, Switzerland, Liechtenstein
  • Türkiye
  • North Macedonia
  • Serbia
  • Ukraine

That gives the CTC a clean footprint across Europe and the eastern Mediterranean, but excludes the rest of the world. A movement from China to Germany cannot run end-to-end as a CTC transit — only its EU/UK/EFTA-and-friends leg can.

What Joining Did for the UK

When the UK left the EU customs union on 1 January 2021, it joined the CTC as an independent contracting party (with prior agreement from the existing parties). That was a deliberate continuity move: it meant UK-EU road and rail transit could carry on much as before, instead of every load being treated as a fresh import / export at the border.

The practical consequences:

  • A T1 from Türkiye can cross Bulgaria, Romania, Hungary, Austria, Germany, the Netherlands, France and the UK on the same declaration.
  • Union goods moving via Great Britain can preserve their Union status via a T2.
  • The UK uses NCTS (its own implementation, now on Phase 5) compatible with the EU and EFTA versions.
  • The UK runs a Comprehensive Guarantee authorisation regime broadly aligned with EU rules.

This is the framework that lets companies like ours act for clients regardless of which side of the Channel a movement starts.

How the CTC Maps onto Day-to-Day Filing

When we tell a client "we'll do a T1 through CTC", that means:

  1. We file a transit declaration into the UK's NCTS at the Office of Departure (e.g. Dover, Folkestone, Felixstowe).
  2. The declaration carries a CTC procedure code that signals the route through contracting-party territory.
  3. The guarantee is one we hold under our HMRC-issued CGU authorisation.
  4. The TAD travels with the goods through Offices of Transit in the EU and onwards.
  5. The Office of Destination — anywhere in CTC territory — discharges the movement and lets the goods be cleared for import.

We don't have to file separate declarations for each EU border crossing because the CTC harmonises the procedure across all of them.

Authorisations the CTC Unlocks

The CTC also underpins a set of authorisations that smart operators eventually move toward:

  • Authorised Consignor (ACR). Lets you release transit movements from your own premises without physically presenting goods at an Office of Departure. Huge time saving for high-volume operators.
  • Authorised Consignee (ACE). Mirror of ACR at the destination — discharge happens at your warehouse.
  • Use of seals of a special type (SSE). Approved high-security seals that customs trust without per-movement seal inspection.
  • Comprehensive Guarantee with reduced or 0% cover — only available with a strong compliance record (often combined with AEO).

Each of these is a separate HMRC application, and each unlocks meaningful operational efficiency for high-volume transit users. They are also a way to demonstrate compliance maturity to customers and partners.

Where Operators Get the CTC Wrong

A few patterns we see:

  • Treating a CTC movement as a free trade agreement. It isn't. Duty is still due at the destination based on the destination tariff, origin rules and value.
  • Filing imports as transits at the border. Sometimes you actually want to import at the first port of entry; sometimes transit inland is genuinely better. The choice should be deliberate, based on warehouse location, cash flow and inspection risk.
  • Missing CTC option for status preservation. Companies move Union goods via Great Britain on a T1 instead of a T2 because "the broker said T1 is fine". That can quietly cost duty later.
  • Not investing in ACR / ACE early enough. Many operators do hundreds of movements a year still presenting physically at the border. ACR / ACE pay back fast.

What We Do Under the CTC

At Transit Declaration we operate as an HMRC-authorised customs agent under our own CGU. We file under the CTC every working day across:

  • T1 and T2 declarations into NCTS Phase 5
  • Authorised Consignor / Consignee setups for clients (or working with theirs)
  • Cross-border movements between the UK, the EU and the EFTA states
  • Mixed CTC + TIR routes from Türkiye and the wider region

If you'd like a walk-through of how CTC would work for a specific route or a specific operational pattern — what authorisations would help you, where the cost would come from, what the risks are — get in touch.