UK customs office codes for CDS declarations
HMRC has published the official list of UK customs office codes required for data element 512 of the Customs Declaration Service (CDS). These codes are essential for shippers, freight forwarders, and customs brokers filing declarations under the UK's post-Brexit customs regime. The codes identify which customs office processes each declaration and must be accurately completed to avoid submission errors or delays.
Photo: Diana ✨ / PexelsHMRC has released updated guidance on UK customs office codes for the Customs Declaration Service, published 2 June 2026.
What are customs office codes?
Customs office codes are mandatory identifiers used in data element 512 of CDS declarations. Each code corresponds to a specific UK customs office responsible for processing import, export, and transit declarations. Selecting the correct code ensures your declaration is routed to the appropriate authority and processed without delay.
Who needs this information?
Anyone filing declarations through CDS must use the correct customs office code:
- Freight forwarders preparing CDS submissions on behalf of importers and exporters
- E-commerce merchants self-declaring goods under UK customs rules
- Customs brokers and declaration-service providers
- SMB exporters managing outbound shipments
- Importers clearing goods at UK ports and airports
Incorrect or missing codes will result in declaration rejections, triggering resubmission cycles and clearance delays.
Where to find the codes
The complete list of UK customs office codes is available in Appendix 14 of HMRC's guidance publication. The codes are organized by port, airport, inland clearance depot, and other processing locations across the UK.
According to HMRC:
Find the Customs Office Codes for use with the Customs Declaration Service (Appendix 14).
Shippers should reference this appendix whenever preparing a CDS declaration to verify the correct office code for their point of entry or export.
What this means for shippers
Verify the correct customs office code for your UK entry point or exit location and configure it in your CDS system before submitting declarations. Using an incorrect code will cause rejection and delays. Download Appendix 14 now and update your declaration templates accordingly. Review /landed-cost to ensure all customs procedures and cost estimates account for the correct office routing.
