Compliance
For most of the past five years, European importers have been able to ease gradually into the new post-Brexit customs regime. Grace periods, deferred declarations, and a degree of enforcement leniency gave businesses time to build their systems. That time is now over. As of Q1 2026, full documentary and physical border controls are in effect across all commodity categories entering the UK from the EU, and new outbound requirements affect EU-destined goods from the UK in turn. What was once a matter of paperwork is now a live operational constraint — one that can and does stop freight at the border.
This article lays out the key changes, explains the concepts that most importers still have wrong, and gives you a practical framework for building a documentation workflow that can scale as your trade volumes grow.
The UK's Border Target Operating Model (BTOM), fully implemented in January 2025, eliminated the last of the staged compliance windows. Importers can no longer defer customs entries — every consignment entering the UK from the EU now requires a full import declaration at the point of entry. This applies to goods moving from EU to Great Britain; Northern Ireland continues to operate under different rules under the Windsor Framework.
The practical implications are significant. Goods that previously moved freely on the strength of a commercial invoice now need a complete customs entry including commodity code, customs value, origin, and applicable duties. If any of these elements are incorrect or missing, the shipment will be held at the border pending clarification. In peak periods — Q4 and post-summer restock seasons — this can mean 2 to 4 day delays even for minor documentation errors.
Two administrative requirements that seem straightforward in theory cause the most problems in practice: EORI registration and commodity code assignment.
An Economic Operator Registration and Identification (EORI) number is mandatory for any business importing goods into or exporting goods from the UK or EU. Without one, your freight forwarder cannot file a customs declaration on your behalf. If your business ships internationally — even occasionally — you need a UK EORI and, if you have a presence or regular trade in the EU, an EU EORI as well.
Commodity codes (HS codes) determine the applicable duty rate and any associated controls or licences. There are over 9,000 commodity codes in the UK Trade Tariff, and the difference between an incorrect and correct code can mean the difference between 0 percent and 12 percent duty. More critically, some commodity codes trigger additional documentary requirements — phytosanitary certificates, CITES permits, or import licences — that cannot be obtained after the fact at the port.
"We see more delays caused by incorrect commodity codes than by any other single issue. Businesses classify their goods once, usually when they first start importing, and then never revisit it. Trade tariffs change, product specifications change, and the original code becomes wrong over time." Thomas Rauer, Head of Compliance
The UK-EU Trade and Cooperation Agreement (TCA) allows goods with sufficient UK or EU content to move duty-free between the two territories. This is called preferential origin. The catch is that claiming preferential treatment requires you to prove that your goods genuinely meet the origin rules — and those rules are specific, product-category dependent, and in many cases quite demanding.
The two most common errors we see:
If you are unsure whether your goods qualify for preference under the TCA, the safest approach is to have your customs broker conduct an origin analysis before your next shipment. The cost of that analysis is typically less than the duty exposure from a single incorrect claim.
Most customs problems are documentation problems. The freight itself moves fine — it is the paperwork that holds it up. A scalable documentation workflow has three components:
Standardised templates. Every commercial invoice you send to customs needs to include: supplier and buyer name and address, EORI numbers for both parties, a full description of goods (not a trade name), commodity code, quantity, unit price, total customs value, country of origin, and Incoterms. If any of these are missing, your forwarder cannot file the declaration without going back to you.
A commodity code register. Maintain a master list of your products, their commodity codes, any applicable quotas or licences, and the date of last review. Review it annually and after any significant change to your product range or sourcing.
Archiving obligations. Customs declarations must be retained for 4 years in the UK and 10 years in most EU member states. Your records need to include not just the declarations themselves but the supporting commercial documents used to compile them.
Your freight forwarder is your first line of customs defence, but only if they have the right capabilities. When evaluating a forwarder for compliance-sensitive freight, ask:
At Meridax, our customs team files declarations in-house and holds AEOC status for both UK and EU operations. Every new client account is reviewed against their current commodity code register before their first shipment, and we flag compliance risks proactively rather than waiting for a border hold to escalate the issue.
The customs landscape will continue to evolve — further BTOM phases are expected in 2026 and 2027, and EU import control system (ICS2) requirements for air and express freight are already in force. Building the right systems and partner relationships now is significantly cheaper than managing the consequences of getting it wrong at the border.
