How Brexit-related paperwork still affects UK exporters cash flow

Years after the UK's departure from the European Union, many small and medium-sized exporters are still grappling with a persistent, cash-flow-crushing side effect: payment delays on their EU invoices. While the headlines have moved on, the administrative friction at the border has not. For many businesses, the "seamless trade" promised has been replaced by a frustrating cycle of document queries, customs holds, and clients who—quite reasonably from their perspective—refuse to pay for goods they haven't yet received.

This article breaks down the specific Brexit-related documentation issues that are still tying up UK exporters' cash flow. We will explore why a simple error on a form can halt a shipment for weeks, how this impacts your client's willingness to pay, and the practical steps you can take to get your paperwork right, minimise delays, and ultimately, get your cross-border invoices paid faster.

The Disconnect: Your Invoice vs. Their Goods

The fundamental problem is a disconnect between your accounting process and the physical journey of your goods. You ship a product to a client in France, Germany, or Spain and, following your standard procedure, you issue an invoice with 30-day payment terms. In your accounts receivable ledger, the clock starts ticking.

But for your EU client, the process has only just begun. Your shipment is no longer a simple intra-community delivery; it is now an import. It must clear customs, be inspected, and have all duties and taxes assessed and paid before it can be released. If there is a single query on your commercial invoice, a missing EORI number, or an incorrect commodity code, the shipment can be held in a warehouse at the port of entry for days or even weeks.

From your client's point of view, they have not received the goods. They cannot sell them, use them, or verify them. Why would they pay an invoice for something that's stuck in a customs depot in Rotterdam or Calais? This is the hard reality that short-circuits traditional payment terms and leaves your cash flow in limbo.

The Paperwork Traps That Stall Payments

The "red tape" of post-Brexit trade isn't just a vague inconvenience; it's a specific set of documents where errors have direct financial consequences. Understanding these pressure points is the first step to fixing the problem.

The Commercial Invoice: More Than Just a Bill

Before Brexit, a commercial invoice for an EU sale was a relatively simple affair. Now, it's a critical customs document. Missing or incorrect information is the number one cause of shipments being delayed.

Common errors include:

• Missing EORI Numbers: Both the UK exporter (a GB EORI number) and the EU importer (an EU EORI number) must have one. Forgetting to include both on the commercial invoice is an immediate red flag for customs officials.
• Vague Goods Descriptions: "Computer parts" is not enough. You need to be specific: "100x Model 745Z Graphics Processing Units". A vague description forces customs to open the shipment for inspection, causing delays.
• Incorrect Valuations: The value declared must be accurate. Under-declaring to try and save the client duty is illegal and will lead to fines and severe delays if caught.
• Missing Commodity Codes: Every product has a Harmonised System (HS) code, also known as a commodity code. This code determines the rate of duty and tax. If it's missing or incorrect, the entire customs calculation is wrong.

Rules of Origin: The Key to Zero Tariffs

The UK-EU Trade and Cooperation Agreement (TCA) allows for tariff-free trade (i.e., no customs duties) for most goods. However, this is not automatic. You must prove that your goods "originate" in the UK.

This is done via a "Statement on Origin" included on your commercial invoice. The problem arises when:

• The goods don't qualify: If your product is mostly made from components imported from China and only assembled in the UK, it may not meet the origin requirements. If you incorrectly claim it does, your client will be hit with an unexpected tariff bill and will likely dispute your invoice.
• The statement is worded incorrectly: The TCA specifies the exact wording for the statement. Deviating from this can lead to customs rejecting the preferential tariff treatment.

For a client expecting zero tariffs, receiving a surprise bill for customs duty is a major shock. They will almost certainly withhold payment on your main invoice until the issue is resolved, which can be a lengthy and complex process.

The Customs Declaration Itself

While you or your freight forwarder will submit the formal customs declaration (the C88/SAD form), the information on it is drawn directly from your commercial invoice. An error on the invoice leads directly to an error on the declaration. This can result in the system automatically flagging your shipment for physical inspection (Route 1 or Route 2 clearance), turning a process that could take minutes into one that takes many days.

"But My Terms are 30 Days!" – When Contracts Meet Commercial Reality

A common and understandable frustration for UK exporters is seeing an invoice become 60 or 90 days overdue while a client cites customs delays. You might point to your terms and conditions, which clearly state "Payment due 30 days from date of invoice." You might even have the legal right to charge late payment interest under the Late Payment of Commercial Debts (Interest) Act 1998.

Legally, you may be in the right (depending on the governing law of your contract). Commercially, however, insisting on payment can be disastrous for your client relationship. If the delay was caused by an error in your paperwork, your client will feel, justifiably, that they should not have to bear the cash flow burden.

The hard truth is that for EU exports, "date of delivery" is no longer when the courier picks it up from your warehouse. In the mind of your client, it's the date the goods clear customs and arrive at their warehouse. Acknowledging this reality is key to adapting your processes.

Proactive Steps to Get Your EU Invoices Paid Faster

You cannot control the customs processes in every EU member state, but you can control the quality of your own documentation. Being meticulous upfront is the single most effective way to protect your cash flow.

1. Create a Pre-Shipment Document Checklist

Before any EU-bound shipment leaves your premises, it must be checked against a rigorous list. Do not leave this to chance.

• EORI Numbers: Is your GB EORI number on the invoice? Have you got your client's EU EORI number and is it correct?
• Client Details: Are the full legal name and address of the consignee correct?
• Commodity Codes: Has every single item in the shipment been assigned the correct HS code? Use the UK Government's Trade Tariff tool to look these up.
• Valuation: Is the value of the goods (excluding VAT) accurate and declared in the correct currency?
• Rules of Origin: Do your goods qualify for UK origin? If yes, is the precise, legally-mandated Statement on Origin included on the invoice?
• Incoterms: Have you clearly stated the agreed Incoterm (see below)?

2. Get Serious About Incoterms

Incoterms are a set of globally recognised rules that define the responsibilities of sellers and buyers. For post-Brexit trade, the two most common are Delivered at Place (DAP) and Delivered Duty Paid (DDP). Choosing the right one and stating it on your invoice is not a trivial detail; it defines who is responsible for customs clearance and who pays the import costs.

Incoterm	Who Handles EU Customs Clearance?	Who Pays EU Import VAT & Duty?	Risk for UK Exporter
DAP (Delivered at Place)	The EU Client (Importer)	The EU Client (Importer)	Lower financial risk, but payment can be delayed if the client struggles with customs clearance. You are reliant on their competence.
DDP (Delivered Duty Paid)	The UK Exporter (Seller)	The UK Exporter (Seller)	Higher financial risk and admin burden. You pay for everything to get the goods to the client's door. However, it gives the client a simple, fixed price and eliminates customs delays as a reason for non-payment.

Many small businesses default to DAP, putting the onus on the client. However, this is often the root cause of payment delays, as the client may be inexperienced with importing. Offering DDP terms can be a powerful commercial advantage, as it provides price certainty and a seamless experience for your EU customer. You simply calculate the duties and taxes, add them to your cost, and manage the entire process through your courier or freight forwarder. The client receives the goods with no extra hassle, meaning they have no reason to delay payment.

3. Work With a Competent Freight Forwarder or Customs Broker

Unless you are a large business with a dedicated logistics department, managing customs declarations yourself is a false economy. A good freight forwarder or customs broker is an investment, not a cost. They will:

• Check your commercial invoice for errors before submission.
• Correctly classify your goods and manage the declarations.
• Act as a single point of contact if customs have a query.
• If you ship DDP, they can manage the payment of duties and VAT on your behalf.

Their expertise can be the difference between a shipment sailing through customs and one being stuck for three weeks.

What to Do When an Invoice is Already Overdue

If you're already in a situation where payment is being held up by a customs issue, reactive chasing is unlikely to work. You need to become a problem-solver.

1. Stop Chasing, Start Diagnosing: Pick up the phone. Don't just ask "Where is our money?". Ask "What is the specific problem holding up the shipment? Can you forward me the email from the customs agent?" Get the details. Is it a query on the commodity code? A problem with the origin statement?
2. Collaborate to Resolve: Work with your client and your freight forwarder to provide the necessary information. This might involve sending a revised commercial invoice or providing technical specifications to justify a commodity code. Be proactive and helpful.
3. Confirm Resolution and Set a New Payment Date: Once the goods have been released, send a polite email confirming this. State clearly: "Further to our conversation, we're pleased the customs issue is now resolved and you have received the goods. As agreed, payment for invoice [number] will now be made by [new date]."
4. Automate the Follow-Up: Once a new, firm payment date is agreed, the last thing you want is for it to fall through the cracks again. This is where updating the due date in your accounting software and using an automated chasing tool can be invaluable. A system like InvoiceReminder can take that new date and automatically resume a professional chasing sequence if the new deadline is missed, ensuring you stay on top of it without manual effort.

By shifting from a purely financial conversation to a collaborative, logistical one, you not only solve the immediate problem but also build trust with your client, making future transactions smoother.

Frequently asked questions

My EU client wants me to pay the import VAT and duties. Should I agree?

This means they are asking you to ship on Delivered Duty Paid (DDP) terms. It involves more work and financial outlay for you, as you will be responsible for all costs to get the goods to their door. However, it can make you much easier to buy from and can eliminate customs delays as a reason for non-payment. You must price this service correctly, building the estimated duty, VAT, and brokerage fees into your quote.

What is an EORI number and why do I need one for EU exports?

An EORI (Economic Operators Registration and Identification) number is a unique ID used to track and register customs information in the EU and UK. As a UK business exporting to the EU, you need a GB EORI number to clear your goods through UK customs. Your EU client needs an EU EORI number for their country to clear the goods upon arrival. Both numbers are mandatory and should be included on the commercial invoice.

Can I charge late payment interest on an invoice delayed by customs?

If your contract's governing law is that of the UK, you are legally entitled to charge interest and compensation under the Late Payment of Commercial Debts (Interest) Act 1998 once an invoice is overdue. However, if the delay was caused by an error in your own paperwork, attempting to enforce this could severely damage your client relationship. It is often more commercially astute to resolve the issue collaboratively and agree on a new payment date.

How do I find the correct commodity (HS) code for my products?

The UK Government provides an official online tool called the Trade Tariff. You can use it to look up the correct 8-digit or 10-digit commodity code for your products when exporting. Classifying your goods correctly is critical, as this code determines the duty rate and any specific licensing requirements. If you are unsure, a customs broker or freight forwarder can provide expert guidance.

My contract doesn't mention which country's law applies. Can I still use UK late payment law against an EU client?

This can be complex. If your contract does not contain a "governing law and jurisdiction" clause, determining which country's laws apply can be difficult and may depend on various factors. For all B2B contracts, especially cross-border ones, it is best practice to include a clause that clearly states which country's laws will be used to interpret the contract and resolve disputes (e.g., "This agreement shall be governed by and construed in accordance with the law of England and Wales").

Automate Your Follow-Up, Focus on Your Business

The administrative burden of post-Brexit trade is a significant drain on the time and resources of UK small businesses. While getting the customs paperwork right is the crucial first step, efficiently managing the subsequent payment collection is just as important. Manually chasing overdue invoices—especially those complicated by cross-border issues—is time you could be spending on growing your business.

InvoiceReminder helps UK businesses and their accountants automate this process. It connects directly to Xero, QuickBooks, Sage, and FreeAgent to send scheduled, escalating payment reminders for your invoices. Instead of you having to manually track due dates and draft follow-up emails, the system does it for you, helping you maintain consistent pressure on your accounts receivable ledger. The Free plan is currently available at no cost and includes unlimited email reminders. InvoiceReminder is built by the team behind WeCovr, which has arranged over 1,000,000 insurance policies in the UK and is authorised and regulated by the Financial Conduct Authority. It helps you spend less time chasing and more time navigating the complexities of international trade.