Post-Brexit Customs Explained – The New Rules in Simple Words

Understanding the Shift: Why Did Customs Rules Change?

Brexit changed everything for UK–EU trade. Before 2021, moving goods between the UK and EU felt like shipping between regions. Now, it's international trade — and that means customs declarations, duties, and new procedures.

The UK leaving the EU's customs union and single market brought back border checks, document requirements, and compliance headaches. But don’t worry — we’ll break it all down in simple terms.

‍

The Key Changes After Brexit

1. Customs Declarations Are Now Mandatory

Every commercial shipment between the UK and EU now requires a customs declaration — whether by land, sea, or air. No exceptions.

‍You need to submit a declaration for:

"Imports into the UK from the EU""Exports from the UK to the EU"

‍

Brexit made trade more complex, but with the right knowledge and partner, it doesn’t have to be a nightmare. Customs Flow Declare exists to support small and medium businesses navigating this new landscape.

2. Duties and VAT May Apply

Depending on the origin of the goods and the trade agreement terms, duties and VAT may be payable at the border. The UK–EU Trade and Cooperation Agreement (TCA) offers tariff-free trade only if goods meet “rules of origin” requirements.

3. EORI Numbers Are Essential

To trade internationally, you must have an Economic Operator Registration and Identification (EORI) number.

UK EORI: Required for imports/exports from the UK
EU EORI: Required if you're based in the EU or handle goods entering the EU

‍

Practical Steps for Businesses

1. Keep Accurate Records

Prepare invoices, packing lists, commodity codes, and transport documents. If you're using an agent, they’ll need all this to prepare your declaration.

2. Classify Your Goods Properly

Every product must be classified under the correct HS (Harmonised System) code. This determines duties, taxes, and rules of origin.

3. Decide: Handle Declarations Yourself or Use an Agent?

You can:

• Register and submit declarations through HMRC yourself (complex),
• Or outsource it to a customs intermediary like Customs Flow Declare — fast, compliant, and hassle-free.

‍

Common Pitfalls to Avoid

How Customs Flow Declare Helps You

We're here to simplify post-Brexit customs for your business.

• No jargon, just clear guidance
• Fast declarations at competitive prices
• Fully digital process with document upload
• Peace of mind — no missed steps

Final Thoughts

Brexit made trade more complex, but with the right knowledge and partner, it doesn’t have to be a nightmare. Customs Flow Declare exists to support small and medium businesses navigating this new landscape.

‍