Let's have a frank conversation about customs duty — because if you're importing products into the UK from China, Vietnam, or anywhere else outside Great Britain, this is the one area where ignorance genuinely costs money. Not a little money. Significant money.
UK customs duty is not a flat fee, a rounding error, or something you can leave to your freight forwarder to sort out. It's a structured system of tariff codes, valuation rules, and compliance obligations that, if managed correctly, can be minimised legally. If managed badly — or ignored — it creates surprise bills at the port, potential HMRC penalties, and deals that looked profitable on a spreadsheet but aren't in practice.
And 2026 is not a quiet year for UK customs. The Low Value Import (LVI) reforms are reshaping how low-value parcels enter the UK, the Border Target Operating Model (BTOM) continues to roll out new data requirements, and HMRC's enforcement of overseas seller obligations is tightening considerably. This guide covers everything you need to know — from the absolute basics of how duty is calculated, through to the specific reforms affecting the market this year and the legitimate strategies for reducing your duty bill.
This guide is for: UK business owners, brand founders, Amazon sellers, and buyers who source products from China, Vietnam, or other manufacturing hubs and import them into Great Britain. Whether you're planning your first container or managing your fiftieth, this will clarify the rules, highlight where savings are available, and explain exactly what the 2026 LVI reforms mean for your business.
Customs duty (also called import duty or import tariff) is a tax levied by the UK government on goods imported from countries outside Great Britain. It is separate from VAT and is calculated as a percentage of the declared customs value of the goods, with the rate determined by the product's commodity code under the UK Global Tariff (UKGT).
Customs duty is one of the most underestimated costs in importing. It's not hidden — HMRC publishes every duty rate publicly on the UK Trade Tariff — but many new importers either don't know to look, or underestimate how quickly duty accumulates across a shipment of any real scale.
Consider a UK retailer importing £50,000 of wooden furniture from China. A typical wooden furniture commodity code carries a 5.5% duty rate. That's £2,750 in duty alone, before you've added 20% import VAT on the dutiable value (the customs value plus the duty). Do that calculation wrong and you're not just off on your landed cost — you've potentially submitted an inaccurate import declaration to HMRC, which carries its own penalties.
Now multiply that across a business doing six to twelve container imports a year, and the financial impact of correct tariff classification and legitimate duty relief strategies becomes very substantial indeed. At Epic Sourcing, we've helped UK businesses recover thousands of pounds annually simply by ensuring their commodity codes were correct and their UKVFTA origin eligibility was actually being claimed.
Beyond cost, the compliance dimension matters more than ever. HMRC has significantly increased scrutiny of import declarations in recent years, particularly for goods arriving from China. Under-declaration of value, incorrect origin claims, and misclassified commodity codes are all active enforcement priorities. The question isn't whether HMRC might check — it's whether your declarations will hold up when they do.
The honest answer is that most UK importers could be doing this better. This guide is designed to close that gap.
Since leaving the EU Customs Union, the UK operates its own tariff schedule: the UK Global Tariff (UKGT). Every product that enters Great Britain must be classified under a 10-digit commodity code that determines the applicable duty rate. You can look up any commodity code using the UK Trade Tariff tool at trade.gov.uk — HMRC's official classification reference.
Commodity codes are structured hierarchically: the first 6 digits are internationally standardised under the World Customs Organisation's Harmonised System (HS), used by customs authorities worldwide. The remaining 4 digits are UK-specific. Getting the code right matters enormously — different codes on what appear to be similar products can carry wildly different duty rates. Certain synthetic textiles attract zero duty, whilst cotton-based equivalents can carry rates of 12% or more. The difference between two adjacent commodity codes can be thousands of pounds on a single container.
Commodity classification is both a science and, at times, an art. For complex products — especially anything that could fall into multiple categories — it's worth consulting a licensed customs broker or applying directly to HMRC for a Binding Tariff Information (BTI) ruling. A BTI gives you legal certainty: HMRC must accept the classification you've been given, removing all classification risk.
Never simply use the commodity code your supplier puts on their export invoice. Chinese suppliers operate under China's customs tariff schedule, which shares the first 6 digits with the UK system but diverges significantly after that. Their classification reflects their export obligations — not the correct UK import classification. Always verify commodity codes yourself against the UKGT, or instruct a UK customs broker to do so.
UK customs duty is calculated on the customs value of the goods — and the customs value is not simply what you paid for them. Under the WTO Customs Valuation Agreement (which HMRC follows), the primary method of customs valuation is the transaction value: the price actually paid or payable for the goods, adjusted to a CIF (Cost, Insurance, and Freight) basis for UK imports.
This means your customs value includes the supplier invoice price (FOB value), plus the cost of international freight to the UK port of entry, plus marine insurance (if applicable). The full calculation works as follows:
| Cost Element | Example (£50,000 order, 5.5% duty) | Notes |
|---|---|---|
| FOB Value (goods) | £50,000 | Price paid to supplier |
| + Sea Freight (China → Felixstowe) | £2,800 | Approx. cost of a 20ft container |
| + Insurance | £150 | Typically ~0.3% of cargo value |
| = Customs Value (CIF) | £52,950 | Duty is calculated on this figure |
| × Duty Rate (5.5%) | £2,912 | Import duty payable — not reclaimable |
| × 20% VAT (on CIF + Duty) | £11,172 | Reclaimable via PVA if VAT-registered |
| Total border charges | £14,084 | Of which £2,912 is a real cost |
These are two entirely distinct charges and it's important not to conflate them. Import duty is a customs tariff — a trade tax — and it is not reclaimable under any circumstances. It is a real, permanent cost to your business. Import VAT is the UK's standard 20% VAT applied at the point of importation, and for VAT-registered businesses it is reclaimable through Postponed VAT Accounting (PVA) on your quarterly VAT return. No cash changes hands at the border; you simply include it on your VAT return and it nets out.
Non-VAT-registered businesses cannot reclaim import VAT, which significantly increases their effective landed cost per unit. For businesses approaching the £90,000 VAT registration threshold, the ability to reclaim import VAT through PVA is often a compelling reason to voluntarily register before the threshold is reached.
An Economic Operators Registration and Identification (EORI) number is your unique identifier for all customs interactions with HMRC. If you're importing goods into Great Britain from outside the UK — even on a one-off basis — you need an EORI number. Without one, your goods will be held at the port and cannot be cleared through customs.
Applying for a UK EORI number (which begins with "GB") is free and done through the HMRC website. Most applications are processed within five business days, though online applications often receive an immediate decision. If you're also importing into Northern Ireland (which remains within the UK-EU Single Market for goods under the Windsor Framework), you'll additionally need an XI EORI number — a frequently overlooked complication for UK businesses with Northern Ireland-side operations or distribution.
Some freight forwarders will use their own EORI number on your import declaration if you haven't provided yours. This means the formal import record is registered in their name, not yours — creating potential compliance issues if HMRC subsequently queries the declaration. As the buyer and actual importer, HMRC may still hold you responsible for the accuracy of the declaration regardless of whose EORI was used. Always obtain your own EORI number before importing.
The Customs Declaration Service (CDS) is HMRC's current customs IT platform, which fully replaced the legacy CHIEF system. All UK import and export declarations must now be submitted through CDS. If you're working with a customs broker or freight forwarder, they will typically handle CDS submissions on your behalf — but as the importer of record, you are legally responsible for the accuracy and completeness of every declaration.
CDS requires more detailed data than the old CHIEF system, including additional commodity-level information, supporting document references, and enhanced consignment data. This increased data requirement is deliberate: HMRC uses the richer dataset to enable more targeted risk profiling and compliance checking. The practical implication for importers is that your paperwork needs to be thorough and consistent — commercial invoices, packing lists, certificates of origin, and any applicable product compliance certificates all need to be available and to match the declaration.
One critical feature of CDS is support for Postponed VAT Accounting (PVA), which allows VAT-registered importers to account for import VAT on their VAT return rather than paying it upfront at the border. If you're importing regularly and not yet using PVA, speak to your customs broker immediately — it's a significant cash flow advantage that every VAT-registered importer should be using.
The Incoterms (International Commercial Terms) specified in your purchase contract determine who is responsible for freight, insurance, and customs clearance. This matters significantly for duty liability and for understanding your true all-in landed cost.
Most experienced UK importers use FOB or DAP terms and manage UK customs clearance through a trusted UK-based customs broker. This keeps you in control of the compliance process and ensures the import records are in your name.
"Low Value Imports" (LVI) refers to individual parcels and consignments of goods entering the UK at relatively low declared values — primarily individual B2C parcels shipped directly from overseas manufacturers or sellers to UK consumers. The explosive growth of platforms such as Temu, Shein, and AliExpress has driven an enormous increase in the volume of these small parcels entering the UK, creating customs enforcement challenges, competitive distortions for UK-compliant retailers, and increasing pressure on the Border Force's parcel processing capacity at hubs including Heathrow and East Midlands Airport.
Since January 2021, the UK has operated a two-tier system for VAT on imported goods arriving in low-value B2C consignments:
The problem, as HMRC and UK retailers have consistently highlighted, is compliance. A significant proportion of overseas sellers shipping parcels valued under £135 directly to UK consumers have either failed to register for UK VAT, or have structured their shipments — sometimes artificially splitting orders, sometimes under-declaring values — to avoid the requirements. The result has been a two-tier market where compliant UK retailers collect and remit VAT on every sale, whilst non-compliant overseas sellers compete at prices that effectively exclude VAT. This is both legally wrong and commercially damaging to legitimate UK businesses.
The 2026 LVI reform programme represents the UK government's and HMRC's most significant tightening of low-value import enforcement and marketplace obligations to date. Key elements include strengthened marketplace liability, enhanced customs data requirements, and BTOM data standards. Combined with risk-profiling systems, this makes parcel-level enforcement increasingly viable at scale.
If you're importing goods commercially in volume: the LVI reforms primarily target B2C parcel flows. The reforms do not change the fundamental customs duty framework for commercial bulk imports — container loads, pallet shipments, and wholesale consignments have always required full declarations and duty payment.
Under no circumstances under-declare the value of goods on import declarations. This constitutes customs fraud. HMRC actively investigates it. Penalties include recovery of unpaid duty plus interest, civil penalties of up to 100% of the unpaid amount, and in serious cases criminal prosecution.
If you're importing commercial volumes of goods for resale in the UK, the LVI reforms do not directly change your existing obligations. You already submit full customs declarations, pay duty at the correct commodity code rates, and account for import VAT. What the reforms do affect is the competitive landscape around you — as overseas low-value parcel sellers are brought into compliance, the effective price advantage they've enjoyed over UK-compliant importers will erode.
The UK-Vietnam Free Trade Agreement (UKVFTA) came into force in January 2021 and offers substantial duty savings for goods with sufficient Vietnamese origin. Under the agreement, 65% of UK tariff lines on Vietnamese goods were eliminated immediately, with the remainder phasing down over time — the agreement ultimately covers 99.2% of tariff lines at full implementation.
| Product Category | China → UK (Standard Rate) | Vietnam → UK (UKVFTA Rate) | Annual Saving (£200k order) |
|---|---|---|---|
| Clothing & Apparel (cotton) | 12% | 0–4% (phasing to 0%) | Up to £24,000 |
| Footwear (leather) | 8% | 0% | £16,000 |
| Furniture (wooden) | 5.5% | 0% | £11,000 |
| Bags & Luggage (textile) | 3.7% | 0% | £7,400 |
| Consumer Electronics | 0–3.7% | 0% | Up to £7,400 |
| Gym & Sports Equipment (metal) | 2.7% | 0% | £5,400 |
For UK businesses that import goods for further processing or re-export, HMRC offers duty relief schemes including Inward Processing Relief (IPR), Customs Warehousing, Returned Goods Relief, and Temporary Admission. These require HMRC authorisation and carry specific record-keeping obligations, but for the right business models they represent entirely legal and substantial duty savings.
This is the single most common error. Some importers accidentally use codes with lower duty rates, creating underpayment liability. Others overpay for years. The fix: use the UK Trade Tariff, consult your customs broker, and consider a BTI ruling for complex products.
If your Vietnamese supplier is REX-registered and your goods meet the UKVFTA rules of origin, you may be legally entitled to zero or reduced duty — but you have to actively claim it. Many importers don't know to ask for this. Over a year of shipments, the unclaimed saving can easily run to tens of thousands of pounds.
HMRC requires customs duty to be calculated on the CIF value — the landed cost of goods at the UK port of entry, including international freight and insurance. Many importers base their customs value on the supplier invoice price alone, omitting freight and insurance costs.
Paying import VAT at the border rather than through Postponed VAT Accounting is an unnecessary cash flow burden for VAT-registered businesses. Ask your customs broker to enable it on your next shipment — there is no downside.
Your Chinese or Vietnamese supplier knows their country's export customs procedures, not UK import requirements. As the importer of record in the UK, you are legally responsible for the accuracy of your UK import declarations.
At Epic Sourcing, we work with UK businesses every day who are building supply chains from China and Vietnam. Helping you think through the customs and compliance picture is part of what we do from the very first conversation.
from £699
We find you a verified, compliant supplier with an established track record of exporting to UK customers — someone who understands documentation requirements and their obligations around origin certification.
Learn more about White Label →from £1,899
Full product development with a manufacturer capable of providing complete compliance documentation — test reports, UKCA marking where required, and origin documentation for UKVFTA claims. We help you capture duty-saving opportunities from the outset.
Learn more about Private Label →from £3,299
For established UK businesses looking to build exclusive, direct supplier relationships with full commercial and compliance infrastructure. We evaluate Vietnam sourcing options specifically to maximise UKVFTA preferential duty rates.
Learn more about Secret Label →Standalone service
Before you commit commercial volumes to a supplier, we verify their business legitimacy, export track record, and documentation capabilities — including whether they can provide compliant origin certificates for UKVFTA claims.
Learn more about Supplier Verification →Book a free consultation with the Epic Sourcing UK team. We'll look at your current product categories, identify duty saving opportunities through UKVFTA or HMRC relief schemes, and make sure your supply chain is set up for compliance from the start.
Book Your Free ConsultationIn principle, yes — customs duty applies to all goods imported into Great Britain from outside the UK, with rates determined by the commodity code under the UK Global Tariff. In practice, many goods carry a 0% duty rate (particularly consumer electronics, certain raw materials, and goods covered by preferential trade agreements such as UKVFTA), so the effective duty bill varies significantly by product category. For commercial importers shipping container loads or pallet quantities, duty has always been payable and declarations have always been required.
These are separate taxes addressing separate obligations. The £135 threshold applies specifically to how VAT is collected on low-value B2C imports — for goods sold at or below £135 directly to UK consumers, VAT is collected at the point of sale rather than at the border. Customs duty is an entirely separate charge based on commodity codes. For business-to-business importing — which covers the vast majority of Epic Sourcing's clients — both duty and import VAT apply and must be declared accurately on every import entry.
There are two conditions to satisfy. First, the goods must genuinely originate in Vietnam under the UKVFTA rules of origin — generally meaning they were wholly produced or underwent sufficient manufacturing transformation there. Second, you need valid proof of origin: either an EUR.1 movement certificate issued by Vietnamese customs, or a statement of origin from a REX-registered Vietnamese exporter. Ask your Vietnamese supplier directly whether they are REX-registered and whether your specific product qualifies.
No. PVA is available exclusively to businesses registered for UK VAT. If your business is below the £90,000 threshold and not voluntarily registered, import VAT must be paid at the border as part of customs clearance. For businesses approaching the threshold, the ability to use PVA is one practical financial reason why voluntary registration makes sense even before the compulsory threshold is reached.
HMRC has a statutory power to raise assessments for underpaid customs duty for up to three years from the date of the relevant import entry, and up to 20 years in cases of deliberate non-compliance. If you discover a systematic error, voluntary disclosure to HMRC before they identify the issue themselves typically results in substantially reduced penalties. Accurate record-keeping for a minimum of four years from the import date is strongly recommended.
Customs duty doesn't have to be a cost you simply absorb. With the right sourcing strategy — verified suppliers, accurate documentation, and a genuine understanding of the relief schemes and trade agreements available to you — it's a manageable and often reducible part of your landed cost. The Epic Sourcing UK team works with British businesses on exactly this every day.
Epic Supply Chains UK Ltd · 71-75 Shelton St, London WC2H 9JQ · hello@epicsourcing.co.uk
