The Trader Support Service (TSS) is a free, government funded service provided on behalf of HMRC to help businesses move goods between Great Britain and Northern Ireland. Launched in 2020, it supports traders of all sizes to comply with the Windsor Framework, the arrangements governing the movement of goods into Northern Ireland after Brexit.
Through the TSS portal, registered businesses can have customs declarations, safety and security declarations and related processes completed on their behalf at no cost, alongside access to guidance, training and specialist customs support.
While the TSS submits declarations for you, your business must enter and provide all the information associated with each movement, and legal responsibility for customs compliance stays with you. BKR helps you get the most from the Trader Support Service, from TSS registration and onboarding to setting up accurate commodity codes, customs values and origin data. We also advise on the UK Internal Market Scheme (UKIMS), goods “not at risk” of entering the EU and duty reimbursement, and help resolve TSS queries and errors so your goods keep moving between GB and NI.
BKR has a dedicated and experienced team of customs professionals who submit TSS declarations on behalf of businesses moving goods between Great Britain and Northern Ireland. We have submitted thousands of TSS declarations for our clients, managing both ongoing monthly declarations and backlogs of overdue historic declarations.
Our team take the time to understand your business, your freight activities and how your goods move, so we can provide accurate, high quality support and ensure your goods are declared compliantly to HMRC through the TSS portal. Because our team are trained in both the Trader Support Service and traditional customs declarations on CDS, we bring practical experience, efficient use of systems and a strong understanding of customs compliance to every declaration we submit, including the correct use of TSS document codes.
One of the most common challenges traders face on the TSS portal is selecting the correct document codes. TSS document codes, also known as customs document codes or CDS document codes, tell HMRC which certificates, licences, invoices and supporting documents apply to your goods, or confirm that a waiver or exemption applies. Using the wrong document code can lead to rejected declarations, delays at the border or incorrect duty being charged. BKR’s team are trained in every TSS and CDS document code and can quickly identify exactly which codes your goods require.

At BKR, we deliver integrated Trader Support Service (TSS) solutions designed to reduce your administrative burden, ensure total compliance, and keep your GB-to-NI supply chain moving seamlessly.
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Clearing historic TSS backlogs
We understand that the Trader Support Service has been challenging for many businesses, and this has often left a backlog of outstanding TSS declarations. We work with your business to identify and complete overdue supplementary declarations promptly, and we provide weekly progress updates until your TSS backlog is fully cleared.
Ongoing TSS Declarations
BKR supports many businesses with their ongoing monthly TSS declarations. We typically set up a secure SharePoint site where you can upload invoices and supporting documents, and we provide clear contact details and work instructions setting out exactly what we need from you. This keeps the process simple and ensures your TSS declarations are submitted accurately and on time.
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TSS training and workshops
If you would prefer to bring your TSS declarations in house, we provide comprehensive TSS training and workshops tailored to your goods and declarations, covering the TSS portal, commodity codes, customs values and TSS document codes. Many clients continue to use us to cover holidays and busy periods, or to handle complex declarations when they arise.
Speak With An Advisor
Let us know a little bit about how we can help and one of our customs experts will be in touch to arrange a consultation at the next mutually convenient date.
Schedule a free 30-minute consultation with one of our Advisors
Toby Spink
Director
Elizabeth Weldon
Head of Operations
Georgina Halls
Head of Advisory
Let us know a little bit about how we can help and one of our customs experts will be in touch to arrange a consultation at the next mutually convenient date.
Contact us using the details below, or simply fill out the contact form:
Duty management services help businesses manage customs duty liability, declarations, reporting, and compliance when operating customs special procedures such as customs warehousing, inward processing, and outward processing. A strong duty management system helps businesses maintain the records, controls, and audit trails required by HMRC, while reducing the internal burden of running these procedures. For many businesses, customs management services are a practical way of simplifying customs processes and improving compliance.
Many businesses choose to outsource duty management services because the ongoing administration of customs special procedures can be complex, time-consuming, and resource intensive. Outsourced customs support can include outsourced customs brokerage, record keeping, customs reporting, and customs declaration support, allowing businesses to benefit from specialist expertise without building a large in-house function. This approach can help reduce costs, improve compliance, and make customs management more efficient.
A specialist duty management service can help businesses operate customs warehousing and inward processing authorisations in a compliant and efficient way. This includes managing stock records, duty liability, movement tracking, declarations, and reporting to HMRC. For businesses using a customs warehouse or operating under an inward processing authorisation, effective customs compliance support is essential to maintain the procedure and achieve duty saving on imports.
Yes, duty management services can help businesses reduce customs costs by improving the operation of customs special procedures and identifying opportunities for customs duty savings. Procedures such as customs warehousing, inward processing, and outward processing can offer valuable cash flow and duty advantages when managed correctly. By improving compliance, reporting, and procedural control, a well-run duty management system can support long-term import duty savings and more effective customs planning.
A full duty management service can include customs declaration support, import and export declaration support, record keeping, compliance monitoring, stock management, customs brokerage services, IT integration, and account management. It can also include support with a customs special procedures application, HMRC engagement, internal process design, and the ongoing management of the authorisation after approval. This gives businesses access to fully managed customs support and helps simplify customs processes across the wider supply chain.
A duty management service may be right for your business if you are struggling to manage a procedure internally, importing goods with high duty exposure, reworking goods before re-export, or looking for stronger customs compliance support without increasing internal headcount. Businesses using customs warehousing, inward processing, outward processing, or other HMRC special procedures often benefit from customs process outsourcing and specialist customs management services. Where cash flow, compliance, and operational efficiency are priorities, outsourced customs support can be a highly effective solution.