Small Errors, Big Overpayments
In the complex world of customs compliance, a single misclassified commodity code can lead to overpayments amounting to hundreds of thousands of pounds for some businesses. Despite the diligence of in-house teams, the sheer scale of the task means that misclassifications are inevitable, and finding them to correct can be like finding the proverbial needle in a haystack.
Barbourne Brook specialises in uncovering these well-hidden overpayments and turning them into lucrative reclaims. To date, we have claimed over £8.4 million for clients.
Understanding the Harmonised System in Customs Classification
Harmonised System (HS) codes are the international language for classifying products for customs purposes. They are used by over 200 countries to streamline taxes and monitor trade. Each HS code dictates the tariff applied to an imported or exported product. Without precision, businesses risk either overpaying taxes or facing penalties for misclassification. Under the intense pressure of meeting urgent demands for sales, inaccuracies in classification are inevitable.
“
As an experienced customs consultancy, we regularly see a link between in-house teams working at a frantic pace to get goods into the country and the frequency of human error. There are over 5,000 HS codes to choose from (translating into 16,737 commodity codes here in the UK), and the process can be very tricky, especially when the product could fit into multiple categories. One approach to this problem is to choose the code with the higher rate, which reduces the risk during an HMRC audit but also increases the cost of sales.
Adam Wood
Chief Commercial Officer, Barbourne Brook
In some cases, there are discrepancies between the language and terminology used within the trade and that used by HMRC, which causes confusion. In a tribunal between a toy importer and HMRC where the correct duty rate on figurines was debated at length, the classification of individual items came down to some very intricate points, such as:
- Whether the superhero figure represented a human or non-human
- Whether the figures were dolls or statuettes
- Whether figures that came with additional items constituted a figure with accessories or a play set
Case Study: Barbourne Brook Customs Compliance Solutions
Where an incorrect classification code has been used and a business has overpaid customs duty, there is an opportunity for a reclaim.
In a past project, Barbourne Brook successfully reclaimed over £1 million on behalf of a large retail client, by working with the client’s in-house HS classification team to review customs activity.
The organisation had submitted over 58,000 lines of customs declarations over a three-year period, which needed to be analysed for potential misclassifications.
Using highly refined methodology and expertise to analyse the data, Barbourne Brook quickly identified incorrect codes on just 336 lines relating to 31 different products.
58,000+
declaration lines reviewed
336
lines corrected
31
products affected
£1m+
reclaimed
By extracting these lines, making some changes in HS codes and submitting a retrospective amendment to HMRC, the business was able to make a £1 million reclaim that had a significant impact on its profit and loss accounts.
“
These types of projects are not conceptual. They can turn into significant cash injections and ongoing savings for businesses that diligently seek external assistance.
Barbourne Brook consultants have access to an array of tools that are not typically available to in-house teams, including additional explanatory notes, global databases of classification decisions, court cases and committee meeting notes from several government bodies.
The team draws on an extensive pool of knowledge with over 100 years of collective classification experience, across all industries. In marginal cases, consultants take a deep dive into the details and find the lowest possible rate whilst maintaining compliance. If the case warrants, it is also possible to apply for a formal ruling in the form of an Advance Tariff Ruling.
Adam Wood
Chief Commercial Officer, Barbourne Brook
Assistance for Companies Importing Goods into the UK
It can be uncomfortable drawing on the expertise of an external consultancy to verify and potentially improve the work of an in-house team, but with such a vast quantity of data and unavoidable opportunities for oversights, it is often the only way to ensure best practice. Our clients see our services as a surgical tool to complement the existing work being done in-house.
Finding the right details in a vast sea of data is not solely focused on looking harder, it is about looking smarter.
In the world of international trade, precision pays.
Risk-Free Engagement
Barbourne Brook offers customs duty reclaim services on a contingent arrangement. This means there is no upfront investment and payment is a percentage of a successful reclaim, once the funds have cleared back from HMRC. The time window for reclaim opportunities is three years from import.
If you would like to verify your declaration history and get clarity over potential overpayments, contact Adam Wood at Barbourne Brook for a no-obligation conversation about how this service could work for your business.
Contact Us
For further information, or to discuss any aspect of your customs duty, call Adam Wood for a confidential, no-obligation conversation on 01905 914031.
Or email Adam Wood at [email protected]
Sources and Notes
UK commodity code count: UK Trade Tariff database via the Customs Data Hub, November 2026.
This article is general information and not legal, tax or customs advice.
Contact Our Team …
Related Posts
What You Can’t Explain, You Can’t Control: The Visibility Gap in Supply Chain Customs
A supply chain director who has told…