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New deadline for supplementary declarations when moving goods between GB and Northern Ireland

Updated: Mar 1, 2023

British traders moving goods from Britain to Northern Ireland have been advised of a new deadline on supplementary declarations.

Since the Northern Ireland Protocol came into force in 2021, many traders have been using Simplified Frontier Declarations instead of full declarations when moving goods between Great Britain and Northern Ireland. The regulation at the time was that the supplementary declaration should be sent and accepted by the 4th working day of the following month. For example, if you brought goods in December 2022 and used an SfD, you had until 6th January (since 1st was a Sunday and 2nd a bank holiday) to complete the supplementary declaration process.

However, a recent change to the EU’s Union Customs Code, now states that traders have until the 10th calendar day of the following month. Under these new rules, goods brought in February 2023 would need to be fully declared by 10th March 2023.

Need help trading with or via Northern Ireland?

  • The Chamber can help you with your customs declarations processes and complete these on your behalf through our Chamber Customs services. Please see here for more information or email / call 0161 393 4314 if you would like to discuss our services in more details.

  • If you are a trader experiencing issues with trading with Northern Ireland, feel free to contact us. We are always looking for constructive feedback which we can voice on behalf of our members and customers to local and national government. Just drop us an email to

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