Celní systém CDS ve Spojeném království: Co se změnilo oproti CHIEF
Úvod
For three decades, the way goods crossed the UK border was defined by a single piece of software. The Customs Handling of Import and Export Freight system, known to everyone in the trade simply as CHIEF, went live in 1994 and quietly processed declarations through the years of the Single Market, the Brexit referendum and the pandemic. Today it no longer exists as a working option. HMRC closed CHIEF for import declarations on 30 September 2022 and for export declarations on 4 June 2024, which means the Customs Declaration Service, or CDS, is now the only platform for UK customs declarations.
Many people describe the switch as a software upgrade. In practice it was closer to a change of language. CDS asks for different data, works out duties and measures in a different way, handles payments and corrections differently and produces different reports. Clearance instructions written in the CHIEF era, with their references to box numbers and legacy procedure habits, remain a common source of rejected declarations and delayed containers even now.
This article looks at the move from a freight forwarding point of view. It sets out the migration timeline, compares the two systems side by side, explains the data and payment changes that matter most to importers, and then brings the story up to date with what HMRC has changed since go-live, including the free Get Customs Data service and the steady run of CDS releases through the autumn of 2026. Along the way it covers what shippers moving cargo from China should prepare before a container sails, and where a forwarder such as Topway Shipping fits into the process.
Why HMRC Replaced CHIEF
CHIEF was built in an era when most UK trade with Europe moved without a customs declaration at all. After Brexit, declaration volumes rose sharply and the age of the platform began to show. Industry commentary describes a legacy system that was increasingly difficult to maintain and not flexible enough for post-Brexit trade. CDS was designed around a data structure aligned with the Union Customs Code, which gave HMRC a more standardised data set and a platform that could be extended without rewriting its foundations.
The road to switching off CHIEF was anything but smooth. According to reporting at the time, HMRC originally intended to complete the replacement in March 2020, the target then moved to March 2023, and the final closure of CHIEF for exports settled on 4 June 2024. In between, the government chose to keep investing in CHIEF and ran the two systems in parallel, with CHIEF handling Great Britain imports while CDS dealt with Northern Ireland movements until it could be scaled to cope with the volume.
Trader readiness was a recurring worry. HMRC’s own trader research from March 2023 found that 39 per cent of the traders surveyed had registered for CDS, with a further 13 per cent planning to do so, and that only just over half of exporters knew CHIEF would stop accepting export declarations. HMRC later wrote to more than 220,000 businesses ahead of the import deadline and offered a free rehearsal service so that firms could practise on a dummy version of the platform before going live.
| Datum | Milestone |
| 1994 | CHIEF goes live as the UK’s customs declaration system. |
| od 2018 | CDS begins rolling out, initially for import declarations. |
| 30 September 2022 | CHIEF closes for import declarations. Imports must be declared on CDS. |
| Březen 2024 | All businesses can move their export declarations to CDS. |
| 4 června 2024 | CHIEF closes for export declarations. The NES XML and email service also closes for export submissions. |
| 13 November 2025 | The free Get Customs Data service launches, replacing paid MSS reports. |
| 31 2026 března | Contracts for the paid customs data service end. |
The practical lesson from the timeline is that CDS is no longer a transition project. It is a mature, constantly updated production system, and the interesting questions now concern how it behaves day to day and how often it changes.
Northern Ireland adds a further layer. Traders using XI EORI numbers have their own set of rules under the Windsor Framework, and HMRC has issued separate notices on Northern Ireland movements, including the end of indirect exports from Northern Ireland in November 2025 and an update to Northern Ireland movements from 13 April 2026. Anyone whose supply chain touches Northern Ireland should read CDS release notes with that in mind, because a change that is cosmetic for Great Britain can be material for XI traders.
CHIEF and CDS Side by Side
It helps to see the two systems laid out against each other before digging into the detail. The table below summarises the differences that a shipper or importer is most likely to notice.
| Vzhled | HLAVNÍ | CDS |
| Představeno | 1994 | Phased in from 2018 |
| Datová struktura | Box-based layout following the Single Administrative Document | Individual data elements aligned with the Union Customs Code |
| Zprávy | EDIFACT-style messages, usually through Community System Providers, with NES web for smaller exporters | XML declarations through API-connected software, plus an HMRC online service for simple exports |
| Tariff logic | Commodity code and procedure checked against the tariff, with relatively few cross-field checks | Duties, preferences and restrictions derived from commodity code, origin, procedure and additional codes, with cross-validation between fields |
| Platby | Deferment arrangements tied to CHIEF | Payment methods and agent authority set up within CDS |
| Datové zprávy | Paid MSS reports | Free Get Customs Data service since November 2025 |
| Stav dnes | Closed (imports 30 September 2022, exports 4 June 2024) | Sole UK customs declaration platform |
The table hides the biggest difference, which is one of philosophy. CHIEF let you fill in a form and checked that the result was plausible. CDS interrogates the declaration, deriving what should apply from the commodity code, the origin and the procedure, and then rejecting anything that does not fit together. That is why experienced declarants who could key CHIEF entries without thinking had to relearn their craft, a point made repeatedly by trade bodies during the migration.
The change of messaging format matters as well. Software vendors and in-house IT teams that had built integrations to CHIEF had to rebuild them for CDS, and smaller traders who relied on a bureau or on web-based tools had to wait for those providers to catch up. For importers that use a broker or forwarder this is largely invisible, but it explains why some agents were slower to offer full CDS capability than others.
The Data Shift: Where Most Rejections Begin
From boxes to data elements
Anyone trained on CHIEF learned to think in boxes. A procedure went in one box, a commodity code in another and the supporting documents in a third. In CDS the same information is broken down into numbered data elements, such as 5/15 for country of origin, each validated individually and in combination with others. Training specialists warned at the time that the data declared in CDS differs from CHIEF and that CDS introduces elements with no CHIEF equivalent, because the aim was to standardise data sets in a way that other trading nations could recognise.
The declaration is also layered. Some information applies to the whole declaration, while other details must be given for every commodity line. A declaration cannot simply be translated from an old CHIEF template. The underlying clearance instruction has to be rebuilt around the way CDS asks its questions.
Commodity codes, tariff measures and additional codes
CDS leans heavily on the online tariff. The ten-digit commodity code determines which measures apply to the goods, and many of those measures can only be satisfied by declaring an additional code. Trade remedies are the clearest example for China-origin cargo. Where anti-dumping or countervailing duties apply, the rate often depends on which producer made the goods, so a producer-specific code or an all-other-companies code has to be declared alongside the commodity code. A broker who relies on the commodity code alone, without checking the measures attached to that line, will either see a rejection or risk paying the wrong amount.
Origin and preference
Origin has become one of the most closely policed fields in the declaration. Country of origin sits in data element 5/15 and preferential origin in 5/16, and CDS Release 5.1.0, delivered on 28 March 2026, updated the cross-check between the two. HMRC published further guidance on preference codes and origin data for tariff measure derivation in the same period. One specialist commentary on the release noted that HMRC has kept adjusting how the system validates and interprets declaration data since launch, with origin and preference the main areas of attention.
Most Chinese-made goods enter the UK at the standard third-country rate, so preference claims are rarely in play. The risk lies elsewhere, in mixed consignments where goods made in another country are packed alongside Chinese goods in the same container, or where supplier paperwork shows inconsistent origin statements. Every item line needs a clean and consistent origin story before it is filed, because CDS will test it.
Customs value and apportionment
Valuation is the part of the declaration that most directly affects the duty bill, and CDS gives it less room to hide. The customs value of imported goods in the UK includes the cost of transport and insurance up to the point of entry, so the freight charge on the ocean bill of lading becomes part of the dutiable amount. When a container holds several commodity lines, that freight has to be apportioned across them in a sensible and consistent way. Spreading it evenly by line, rather than by value or weight, can overstate or understate the duty on individual items and sit badly with an audit trail.
This is why shippers should not treat the freight invoice as an afterthought. Brokers need the final freight and insurance figures at the time of declaration, and a forwarder that issues clear, itemised charges makes it far easier to get the value right. For e-commerce importers with thin margins, an incorrectly stated value is not only a compliance risk but a cost one, because duty and import VAT are both calculated from it.
Documents, status codes and procedure codes
Supporting documents work differently too. In CDS, certificates, licences and other evidence are declared using document codes and status codes that tell HMRC whether a document is attached, held on file or not required, and the tariff dictates which combinations are acceptable for a given commodity line. Procedure codes capture the requested and previous procedure, with additional procedure codes for special situations such as returned goods or inward processing, and many tariff measures are tied to them.
None of this is exotic, but it punishes improvisation. A clearance instruction that says standard import and usual codes is no longer enough, because the right answer for one line of a shipment may be wrong for the next. The table below shows the main data points and the problems that typically arise on China-origin cargo.
| Datový bod | What CDS expects | Typical issue on China-origin cargo |
| Kód komodity | Ten-digit code matching the goods, checked against the online tariff | Supplier provides only a six-digit HS code, or a code used for another market |
| Additional codes | Measure-specific four-character codes where trade remedies or restrictions apply | Producer-specific anti-dumping code missing from the declaration |
| Země původu | Declared consistently with any preference claim | Mixed-origin cartons shipped under one code |
| Dokumenty | Document code and status code permitted by the tariff for that line | Certificate held on file but the wrong status declared |
| Vlastní hodnota | Value including transport and insurance to the UK border, apportioned correctly | Freight not spread across lines in an LCL consolidation |
| EORI and authority | Importer and declarant EORI numbers subscribed and linked correctly | Agent not authorised or importer EORI not registered for CDS |
Registration, Access and Payment
Before any declaration can be made, a trader needs a GB or XI EORI number and a CDS subscription linked to a Government Gateway account. Subscription is done online using the business’s Government Gateway user ID and EORI number, and it is a step that many importers who always relied on an agent skipped under CHIEF. Under CDS it is worth doing even if you never file a declaration yourself, because the reports, payment arrangements and agent permissions all hang off that subscription.
Most importers do not file their own declarations. A broker or forwarder files through CDS-compliant software, and the importer’s job is to give the agent clear authority and accurate instructions. The type of representation matters. Under direct representation the agent acts in the importer’s name, while under indirect representation the agent becomes jointly liable for the customs debt, which is why many agents price indirect representation differently and may ask for security or prepayment.
Payment is the other practical change. Duty and import VAT are settled through payment methods set up in CDS, typically a duty deferment account backed by a direct debit instruction, a cash account or immediate payment. Trade advisers urged firms during the migration to authorise a preferred payment method as part of their CDS preparations, and the same advice holds for new importers today. Where an agent uses the importer’s deferment account, the account holder must authorise that agent within CDS, and a missing authorisation is a classic reason for a declaration to stall on the day the container arrives.
Many VAT-registered importers also use postponed VAT accounting, which allows import VAT to be accounted for on the VAT return rather than paid at the border. It remains available under CDS and is worth confirming with your broker so that the declaration, the statement and the return all line up.
How the Declaration Lifecycle Works Now
Pre-lodgement, arrival and release
Importers and brokers commonly submit declarations before the goods arrive, which lets the clearance decision be made quickly once the cargo reaches the port. That speed comes with a catch. In 2024 the British International Freight Association reported that pre-lodged import entries which were rejected on arrival could not be amended and resubmitted, so traders had to cancel and file a new declaration to clear the goods. Whether or not that behaviour has since been refined, the lesson is to treat pre-lodgement as a discipline of getting data right first time rather than a way of buying time.
Supplementary declarations and adjustment deadlines
Where simplified procedures are used, a supplementary declaration completes the picture after the goods have been released. HMRC publishes the last dates for late item input and adjustments each year, and they follow a simple pattern tied to the customs and VAT period. For goods cleared in a given month, the deadline is the 10th of the following month, giving ten calendar days. As this article is written in early November 2026, the date for October goods is only a week away.
| Declaration period | Last date for late item input and adjustments | Calendar days available |
| 1 do 30 září 2026 | 10 October 2026 | 10 |
| 1. až 31. října 2026 | 10 November 2026 | 10 |
| 1 na 30 Listopadu 2026 | 10 December 2026 | 10 |
| 1 na 31 prosinec 2026 | 10 2027 ledna | 10 |
There is a small twist. Late supplementary declaration estimates are normally due by 5pm on the 10th, but for a few months the deadline is brought forward. The estimate for September 2026 was due by 5pm on 9 October 2026, and the estimate for December 2026 is due by 5pm on 8 January 2027. Importers with deferment accounts should build these dates into their month-end routine, because a late adjustment can mean an extra payment or a missed correction.
Record keeping is the quiet companion to all of this. HMRC expects customs records to be kept for four years, and the Get Customs Data service now lets a business compare what it has on file with what HMRC holds for the same period. A sensible routine is to reconcile each month’s report against invoices, bills of lading and broker statements, and to raise any differences with the broker while the adjustment window is still open.
Exports Under CDS
Exporters had a later but no less demanding migration. The NES XML and email service stopped accepting export declarations on 4 June 2024, and smaller businesses that previously used NESweb were directed to HMRC’s Make and Manage an Export Declaration Online service. Larger exporters moved to CDS-compatible software, which in many cases meant rebuilding the links between their declaration systems and their inventory and movement messaging.
Under CDS, export declarations are tied to consignment references and movement messages so that arrival at the export location and departure can be reported against the declaration. Exporters who used inventory linking under CHIEF had to make sure that declarations, consignment references and movement messages all line up in the new environment.
CDS is also increasingly enforcing by validation what used to be guidance. Release 5.1.0 on 28 March 2026 stopped Chapter 99 commodity codes 99050000 and 99190000 from being used on export declarations, enforcing existing rules about how personal items should be declared. Separately, HMRC published notice NTE 2026/06 confirming a communication issue between the UK export licensing systems LITE and SPIRE and CDS earlier this year. It is a reminder that export declarations depend on the health of connected government systems, and that exporters of controlled goods should keep an eye on trader notices.
Common Rejections and How to Avoid Them
Most rejected or delayed declarations trace back to a handful of causes. The table below groups them by the reason CDS reacts the way it does and by the preventive step that works best in practice.
| Problém | Why CDS reacts | Jak tomu zabránit |
| Outdated or incorrect commodity code | Measures, duty and documents are derived from the code, so a wrong code changes everything downstream | Classify against the current UK online tariff and keep a product master file reviewed by a specialist |
| Origin and preference mismatch | Release 5.1.0 tightened cross-checks between origin and preference data | Collect origin statements per item line and do not claim preference without proof |
| Missing additional code | Trade remedies and restrictions require specific codes | Check measures attached to each commodity line, especially for producer-specific duties |
| Wrong document status | The tariff defines which document codes and statuses are acceptable | Agree in advance which certificates are attached and which are held on file |
| Agent or payment not authorised | CDS requires explicit authority for each account | Authorise the agent and payment method before the first shipment |
| CHIEF-era instructions | Box numbers and old procedure habits do not map to data elements | Rewrite standing clearance instructions in CDS terms |
One further point deserves emphasis. Because CDS validates at submission, errors surface as rejections immediately rather than as queries weeks later. That is useful, but it also means problems appear when the container is already at the port and storage and demurrage clocks are running. The cheapest place to fix an error is before the cargo sails.
Planned maintenance is another timing factor. Major CDS releases are often delivered at weekends with a scheduled outage, and HMRC has advised declarants to submit before the downtime to avoid delays. When Release 5.1.0 went live on the evening of 28 March 2026, for example, HMRC warned that transit declarations on the connected NCTS system might also be delayed. Shippers with cargo due to arrive on a release weekend should ask their broker whether declarations can be lodged early.
What Has Changed Since Go-Live
Free customs data reports
The most welcome development for importers was the arrival of the free Get Customs Data for Import and Export Declarations service on 13 November 2025. It replaced the Management Support System reports that businesses previously had to pay for, with one adviser reporting a price of around £240 plus VAT per report type per year. HMRC ended the contracts for the paid service on 31 March 2026.
The new service lets businesses download reports based on the declarations made under their name in CDS. Reports can be requested by month, and data goes back four years from the date of the request. In March 2026 adviser commentary noted that the service had gained 15 new fields across three reports and that reports now use the date of clearance rather than the date of entry for their start and end dates, which aligns them with the former paid service. From 1 April 2026 the service was also updated so that reports could include data for XI EORI numbers.
The service also changes expectations. A trade body quoted in the press said that businesses now have no excuse for not checking that they have paid the correct duties, because the data needed to do so is free. Importers should ask their broker to grant access within the service, or set up their own access, and use it for regular reconciliation of duty paid against the value and classification of goods.
A steady release cadence
CDS is not a static system. HMRC issues numbered releases several times a year, each with guidance that tells declarants how to complete declarations differently. The 2026 sequence has been busy.
| Uvolnění | Datum | Headline changes |
| 5.1.0 | 28 2026 března | Updated origin and preference cross-validation, blocked two Chapter 99 codes on exports, and introduced excise changes including additional code X399 and excise tax type 399, which entered the Online Tariff on 11 May 2026 |
| 5.1.0.2 | 29 2026 dubna | Absorbed the cancelled 5.1.0.1 release, bringing validation changes and new goods location codes |
| 5.2.0 | Guidance published 8 May 2026 | Further declaration changes described in HMRC release guidance |
| 5.2.1 | 30 July 2026 | Minor release with no system downtime |
| 5.3.0 | 26 September 2026 | Delivered with a scheduled maintenance window during which CDS was unavailable |
| 5.3.0.1 | 22 October 2026 | Further declaration validation requirements and additions to CDS code lists |
The practical message is that CDS release guidance should be treated as part of the shipping calendar. Brokers’ software will adapt, but shippers’ data must adapt too, and new validations tend to catch exactly the sloppy fields that previously slipped through.
Co přijde dál
HMRC’s longer-term plan for a Single Trade Window, intended to reduce duplicated data requirements across border agencies, has been through a pause. HMRC announced in November 2024 that development in the 2025 to 2026 financial year was paused so that government could take stock, and in May 2026 it invited stakeholders to complete a survey to help shape the next phase of design. For now, CDS remains the central platform, and anyone planning around a replacement should plan for CDS first.
What This Means for China to UK Shipments
For goods moving from China to UK ports, CDS has shifted the centre of gravity of customs compliance upstream. The declaration is only as good as the commercial invoice, packing list and product data behind it, and those documents are created in a factory in Guangdong or Zhejiang weeks before anyone in the UK sees the cargo. A forwarder that understands both ends of the journey can close that gap.
Getting the data right before the cargo sails
Topway Shipping, headquartered in Shenzhen, has provided cross-border e-commerce logistics solutions since 2010. Its founding team has more than 15 years of experience in international logistics and customs clearance, with a strong focus on China to US transportation. The discipline that trade requires, accurate classification, consistent origin and valuation, and documents that match the cargo physically loaded, is exactly what CDS now demands on UK imports as well.
In practice that means collecting the right information at the booking stage rather than the arrival stage. Product descriptions need to be specific enough for a broker to select a ten-digit commodity code with confidence. Invoices should show unit values and any freight or insurance charges clearly, because customs value includes transport and insurance to the UK border. Cartons in LCL consolidations should be labelled so that mixed-origin or mixed-classification goods can be separated on the declaration.
FCL, LCL and clearance timing
Topway Shipping offers flexible full container load and less than container load ocean freight services from China to major ports worldwide. The choice between the two has CDS consequences. An FCL shipment for a single importer usually produces a single declaration with a handful of item lines, which keeps the data tidy. LCL cargo may carry goods for several consignees with different codes, values and additional measures, so the quality of the shipper’s data matters even more. Planning the clearance around the vessel’s arrival, including pre-lodgement where appropriate, helps avoid storage charges at the port.
Beyond the port
Because Topway Shipping’s services span the entire logistics chain, including first-leg transportation, overseas skladování, customs clearance and last-mile delivery, customs data does not have to be handled in isolation. Information captured at the origin warehouse can follow the cargo through the clearance stage, into a bonded or overseas warehouse and onto final delivery. For e-commerce sellers that need predictable delivery dates, that continuity reduces the chance that a rejected declaration silently adds days to the schedule.
| Fáze | What Topway Shipping coordinates | Why it matters under CDS |
| Booking and cargo data | Collection of invoices, packing lists and product descriptions at origin | Provides the raw material for commodity codes, origin and value |
| Doprava na první etapu | Vyzvednutí a konsolidace v Číně | Keeps cargo documentation tied to the physical goods |
| Námořní přeprava | FCL and LCL services from China to major ports worldwide | Determines declaration complexity and arrival timing |
| Celní odbavení | Clearance support as part of the end-to-end chain | Ensures declared data matches what was shipped |
| Skladování v zahraničí | Storage and handling after arrival | Supports controlled release and inventory accuracy |
| Doručení na poslední míli | Final delivery to the customer or marketplace warehouse | Protects delivery promises when clearance runs to plan |
The importer of record question deserves special attention for cross-border e-commerce sellers. Whether goods are sold on delivered duty paid or delivered at place terms, someone must hold the EORI number, be named on the declaration and be responsible for the duty and VAT. Sellers who assume that the carrier or the marketplace takes care of this often discover otherwise when a consignment is held. Agreeing the incoterm, the importer of record and the payment route in writing before the first shipment avoids most of these surprises.
For importers new to the UK, a sensible first step is to agree the data package that must accompany every shipment, and to decide who holds the EORI, who is the declarant and how duty will be paid. A forwarder with a customs background can help settle those questions before the first booking rather than after the first rejection.
Závěr
The move from CHIEF to CDS was not simply the replacement of an ageing computer system. It changed what information a declaration must contain, how that information is checked, how duties and taxes are paid, and how traders obtain their own data afterwards. CHIEF closed for imports on 30 September 2022 and for exports on 4 June 2024, and since then CDS has become a living platform that HMRC adjusts every few months, most recently with the releases of 2026 that tightened origin and preference validation and added further code list requirements.
For shippers, the safest approach is to treat customs data as part of the supply chain rather than a paperwork task at the end of it. Get the classification, origin, value and authority right before the cargo sails, keep an eye on HMRC’s release guidance, use the free Get Customs Data reports to check what has actually been declared, and work with a forwarder that understands both the Chinese origin and the UK destination. Topway Shipping, with its customs clearance experience and full-chain service from first-leg transport to last-mile delivery, is set up to help importers do exactly that.
Nejčastější dotazy
Q: Can I still use CHIEF for any customs declaration?
A: No. HMRC closed CHIEF for import declarations on 30 September 2022 and for export declarations on 4 June 2024. CDS is now the sole platform for UK customs declarations.
Q: Do I need my own CDS subscription if my broker files for me?
A: In many cases your broker can file on your behalf, but you still need a valid EORI number and should subscribe to CDS if you want to manage payment arrangements, authorise agents or access your own data through the Get Customs Data service.
Q: Is the paid MSS reporting service still available?
A: No. The free Get Customs Data service launched on 13 November 2025 and replaced it, and contracts for the paid service ended on 31 March 2026.
Q: When is the next deadline for adjusting October 2026 declarations?
A: HMRC’s published schedule gives 10 November 2026 as the last date for late item input and adjustments for goods cleared between 1 and 31 October 2026.
Q: How can Topway Shipping help with UK-bound cargo from China?
A: Topway Shipping provides FCL and LCL ocean freight from China to major ports worldwide, together with first-leg transportation, customs clearance support, overseas warehousing and last-mile delivery, so that shipment data and clearance planning are handled within one logistics chain.