The complete guide for UK importers navigating post-Brexit customs rules, HMRC requirements, and the biggest shake-up to parcel duty thresholds in decades.
Let's be frank: UK import compliance has never been more complicated — or more consequential — than it is right now. Between post-Brexit trade rules, the UK's growing web of bilateral agreements, the overhaul of the Customs Declaration Service, and the looming end of the £135 customs duty threshold, businesses importing from China, Vietnam and beyond are dealing with a level of regulatory complexity that can genuinely hurt your margins if you get it wrong.
At Epic Sourcing, we've been helping UK businesses source from Asia since 2015. We've dealt with HMRC directly on duty classifications, helped clients save thousands through UKVFTA preferential rates, and watched too many importers receive surprise duty bills that a little upfront knowledge would have avoided. This guide distils that experience into something practical.
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UK import compliance is the process of correctly declaring goods entering the United Kingdom to HMRC, applying the right tariff classification (HS code), calculating and paying the correct customs duty and VAT, and meeting all applicable product safety standards such as UKCA marking. Getting it right means paying the right amount — not more, not less — and avoiding delays, penalties, or seizures at Felixstowe or Southampton.
UK customs rules have been in continuous flux since the 2020 Trade and Cooperation Agreement with the EU. For businesses importing from Asia — particularly China and Vietnam — the key changes have happened more quietly, and their implications are only now becoming clear to many importers.
The post-Brexit UK Global Tariff (UKGT) replaced the EU Common External Tariff and is the baseline duty rate applied to most imports from countries without a UK free trade agreement. For goods from China — which currently has no comprehensive FTA with the UK — you're largely paying UKGT rates. These range from 0% on many industrial components to 12% on clothing, 4–6.5% on consumer electronics, and higher on certain protected sectors such as ceramics and footwear.
Meanwhile, the UK has been building a network of independent trade agreements. The UK-Vietnam Free Trade Agreement (UKVFTA) has been in force since January 2021 and is now mature enough that the duty savings are substantial. The UK joined the CPTPP in December 2024, opening preferential routes for goods from member nations. The UK-India trade agreement has been in advanced negotiation, with significant implications for businesses sourcing from South Asia.
The headline number that anchors this: the UK imported approximately £71 billion of goods from China in the twelve months to March 2025. The vast majority of those businesses are exposed to full UKGT rates — which makes HS code accuracy and supply chain structure critically important for cost management.
HMRC has significantly expanded its post-clearance audit capacity since 2022. Businesses misclassifying goods — accidentally or otherwise — are increasingly being found and issued retrospective duty assessments covering up to three years of imports. The cost of wrong HS codes isn't just a missed payment on one shipment; it can be a six-figure liability stretching back years.
Every product you import into the UK must be classified under a Harmonised System (HS) code. This is a legal requirement, not optional. The HS code determines your duty rate, any import restrictions or licences, and how your shipment is processed at Felixstowe or Southampton.
The Harmonised System is a globally standardised six-digit code maintained by the World Customs Organisation. In the UK it's extended to a ten-digit commodity code on the UK Trade Tariff:
A full UK commodity code looks like 8517120000. You can look up any product on the UK Global Online Tariff at trade-tariff.service.gov.uk — HMRC's official tool.
Here's where most UK importers go wrong: they use the code their Chinese supplier provides, copy a code from a similar product, or pick something broadly relevant and hope for the best. The problem is that small differences in product specification can shift you between codes with dramatically different duty rates.
If you regularly import a product and are unsure about its HS code, you can apply to HMRC for a Binding Tariff Information decision. This gives you a legally binding code for three years. It takes time but is worth it for high-volume imports where the duty difference between codes is significant. A customs broker can help you apply.
Rules of origin determine where a product is considered to "come from" for trade purposes. This isn't necessarily where it was physically assembled — it's a legal determination based on international trade rules. It matters enormously because your duty rate depends on the product's origin.
If you're importing from Vietnam and want to benefit from zero or reduced duty rates under the UKVFTA, you need to prove the goods genuinely originate in Vietnam. Simply shipping goods from a Vietnamese warehouse doesn't make them Vietnamese in origin — specific rules govern how much processing or transformation must happen in Vietnam for goods to qualify.
Wholly obtained: The product is entirely produced in that country — raw agricultural goods, extracted minerals, fish caught in its territorial waters.
Substantially transformed: For manufactured goods, the UKVFTA uses one of three tests: Change of Tariff Heading (CTH), Value Added Rule, or Specific Process Rule. Each defines how much genuine Vietnamese manufacturing must occur for origin to be established.
There is a well-documented pattern of goods manufactured in China being shipped to Vietnam for minimal processing — re-labelling, re-packaging, minor assembly — and then exported to the UK claiming Vietnamese origin to benefit from UKVFTA rates. This is customs fraud. HMRC takes it seriously, and the penalties are severe.
Legitimate Vietnam sourcing means working with factories that genuinely manufacture your goods in Vietnam — sourcing local or ASEAN materials where possible, performing substantial production operations within Vietnam, and maintaining documentation that proves it. If your Vietnamese supplier cannot provide a verified certificate of origin and cannot clearly explain where materials come from, that is a serious red flag.
To claim preferential rates under the UKVFTA, you need either a EUR.1 movement certificate issued by Vietnamese customs authorities, or a Statement on Origin from a Registered Exporter. Keep these documents for at least four years — HMRC can audit preference claims retrospectively.
The £135 customs duty de minimis threshold has been a defining feature of UK small-package importing since Brexit. Currently, goods with a customs value of £135 or less are exempt from customs duty at import — though VAT still applies. That is changing. The UK government has announced plans to reform and ultimately remove this threshold, driven by concerns about unfair competition from overseas sellers exploiting low-value relief to undercut domestic retailers.
| Business Model | Current Position | Impact | Action Required |
|---|---|---|---|
| Drop-shipping from China | Many parcels under £135, no duty | High — every parcel attracts duty | Rethink unit economics; move to bulk model |
| Bulk import for UK fulfilment | Already paying duty on commercial shipments | Low — already fully compliant | Ensure HS codes are optimised |
| Amazon FBA sourcing | Duty paid on inbound FBA shipments | Medium — low-value SKU margins squeezed | Review SKU profitability; consolidate |
| UK brand, private label sourcing | Pays full duty on commercial shipments | Minimal — properly structured | Confirm HS codes; explore UKVFTA savings |
The specific implementation timeline for the £135 threshold reform will be confirmed by HMRC. Check gov.uk/hmrc for the latest. The direction of travel is clear — plan for the change now rather than scrambling when it lands.
If you're importing physical products into Great Britain that previously required CE marking, you need to understand UKCA — the UK Conformity Assessed marking that replaced CE for the GB market post-Brexit. This is an area where a significant number of UK importers have been getting away with non-compliance for longer than they should, and that window is narrowing.
Products destined for Northern Ireland must continue to meet EU requirements and can carry CE marking. Great Britain (England, Scotland, Wales) requires UKCA.
Your Chinese supplier's standard CE certification is for the EU — UKCA is your responsibility as the UK importer. If goods are held at Felixstowe for missing UKCA documentation, the liability is yours. Always clarify compliance requirements before placing an order.
The Product Safety and Metrology Act 2024 updated the UK's overarching product safety framework, giving government powers to implement a modern, consolidated product safety regime for Great Britain. UK businesses importing regulated products should have this legislation on their compliance radar.
An EORI number is your unique identifier for UK customs purposes. You cannot import or export commercially without one. It takes roughly a week to obtain from HMRC and is free. If you've been using a customs broker or freight forwarder's EORI, stop — using someone else's EORI puts customs liability on them and creates an administrative mess.
HMRC's Customs Declaration Service (CDS) replaced the legacy CHIEF system, which closed for imports in 2024. All UK customs declarations are now processed through CDS. Payment options include immediate payment or a Duty Deferment Account, which allows monthly batched payments and significantly improves cashflow for regular importers.
| Document | Purpose | Issued By |
|---|---|---|
| Commercial Invoice | Declares value, quantity, description, and parties | Your supplier |
| Packing List | Detailed breakdown of contents per carton/container | Your supplier |
| Bill of Lading / Airway Bill | Shipping contract and title document for goods | Freight carrier |
| Certificate of Origin | Proves origin — essential for preferential duty claims | Exporter / Customs authority |
| Customs Declaration (CDS) | Formal import declaration to HMRC | You or your customs broker |
| Product Safety Documentation | UKCA declaration of conformity, test reports | Manufacturer / UK importer |
The UK-Vietnam Free Trade Agreement came into force in January 2021 and has matured into one of the most useful tools available to UK importers willing to diversify beyond China. The UKVFTA eliminates duties immediately on approximately 65% of goods traded between the UK and Vietnam, rising to 99.2% duty elimination over time.
For UK businesses sourcing the right products from genuine Vietnamese manufacturers, Vietnam can be materially cheaper on a landed, duty-paid basis — even if the ex-factory price is higher than equivalent Chinese production.
Let's make this concrete. A UK business importing cotton clothing from China pays 12% customs duty. The same product genuinely manufactured in Vietnam enters the UK at 0% under UKVFTA. On a CIF shipment value of £50,000, that's £6,000 saved on a single shipment — £24,000 per year on quarterly shipments.
You need three numbers: your annual import value from China for the product, the UKGT duty rate on your HS code, and whether the product can be genuinely manufactured in Vietnam. If the annual duty saving exceeds the cost of switching supplier, the business case for Vietnam sourcing may be compelling — even before considering lower Vietnamese labour costs.
| Factor | China | Vietnam | Advantage |
|---|---|---|---|
| UK duty — clothing | 12% (UKGT) | 0% (UKVFTA) | Vietnam ✓ |
| UK duty — footwear | 8–17% | 0% (UKVFTA) | Vietnam ✓ |
| UK trade agreement | None (UKGT applies) | UKVFTA (in force Jan 2021) | Vietnam ✓ |
| Sea freight to UK | ~25–30 days | ~30–35 days | China ✓ |
| Manufacturing capacity | Vast — almost any product | Growing — strong in textiles, electronics, furniture | China ✓ |
| Minimum order quantities | Generally lower MOQs available | Typically higher MOQs | China ✓ |
| Labour costs | Rising — approx £4–6/hr equiv. | Lower — approx £2–3/hr equiv. | Vietnam ✓ |
| UKCA compliance support | Good — many factories experienced with EU/UK exports | Variable — check factory export history | China ✓ |
For many UK businesses, the right answer is not exclusively China or Vietnam, but a thoughtful allocation of your product range based on where the compliance and commercial factors align best for each category.
Book a free 30-minute consultation with Epic Sourcing UK. We'll look at your current supply chain, HS codes, and duty exposure — and give you an honest assessment of where you stand.
Book Your Free ConsultationAt Epic Sourcing, UK import compliance is part of every sourcing conversation we have with clients — because the duty structure, origin requirements, and product safety obligations shape which suppliers you work with, how you structure orders, and what your actual landed cost looks like.
Our entry-level service for UK businesses sourcing existing products with your branding. Ideal for testing a product concept with lower capital outlay.
Full sourcing for businesses building their own branded product with customised specifications. Includes compliance documentation support.
Our comprehensive product development service for businesses creating genuinely new products requiring full engineering and compliance oversight.
We have teams based in Shenzhen and Yiwu, and a growing Vietnam operation. Every service tier includes our team's import compliance guidance, because getting you to a landed, compliant product at the right cost is the job.
If you discover an incorrect HS code, seek professional advice from a customs broker or specialist solicitor before taking any action. Incorrect classification can result in either overpayment (recoverable via a C285 amendment to HMRC) or underpayment (triggering a retrospective duty demand covering up to three years). HMRC's post-clearance audit capacity has expanded significantly since 2022, and businesses that self-correct proactively tend to receive considerably more favourable treatment than those caught in an audit.
You are legally entitled to make your own customs declarations through CDS, and some businesses with regular, high-volume imports of the same goods develop this capability in-house. For most UK importers — especially those with varied product ranges or occasional shipments — using a customs broker is the practical and financially sensible choice. A good broker typically saves far more in correct classification and duty management than they cost in fees. At Epic Sourcing, we work with trusted UK customs brokers and can refer you to one appropriate for your product type and volume.
Yes — for many product categories the UKVFTA duty saving is real, substantial, and commercially material. The key conditions are that goods genuinely originate in Vietnam under UKVFTA rules of origin, and your product is in a category where Vietnam has meaningful manufacturing capacity. Textiles, footwear, furniture, certain electronics, and sporting goods are strong examples. We recommend calculating the duty saving against your specific product and volume before making a supply chain switch — something we do as part of our onboarding process for every client.
No. This is origin misdeclaration — customs fraud that is illegal in the UK, China, and Vietnam. Simply transshipping goods through Vietnam does not constitute Vietnamese origin under UKVFTA rules. If you import goods claiming Vietnamese origin that do not genuinely meet the rules, you are liable for back-duties, penalties, and potentially criminal investigation. A supplier making this offer is a serious red flag about their compliance culture generally.
Start by auditing your current exposure: which imports benefit from the de minimis threshold today, and what would duty add to your per-unit cost? For businesses built around low-value direct-from-China parcel flows, assess whether a consolidated sea freight model makes more commercial sense. Then ensure your HS codes are correct so you're paying the right amount when duty applies to all imports. Finally, explore UKVFTA Vietnam sourcing as a partial duty offset. Epic Sourcing can help with all three steps — book a free consultation to get started.
Whether you're starting your first import, reviewing your duty exposure, or exploring Vietnam sourcing as a UKVFTA strategy, Epic Sourcing UK can help. Book a free 30-minute consultation — no sales pitch, just practical advice.
Epic Sourcing UK • 71-75 Shelton St, London WC2H 9JQ • hello@epicsourcing.co.uk
