MIB (Merchandise in Baggage) is a simplified UK customs procedure designed for passengers bringing commercial goods — things not intended for personal use — into Great Britain. Source: HMRC, "Bring commercial goods into Great Britain in your baggage". The procedure replaced the old system of oral declarations and paper C3 forms in 2021 — today almost everything happens online, and the paper Red Channel is used only for physical inspection.
The EasyClearance team regularly takes calls from Polish e-commerce brands, manufacturers and design studios flying to trade fairs in London, Birmingham or Manchester with a suitcase full of samples, asking: "is this legal? is there duty? do I need CDS?". The answer is: yes, legal — if you stay inside the limits. Below we show when the answer is yes, and when it is absolutely no.
Typical MIB users among our clients: a Polish furniture maker flying with upholstery swatches to Clerkenwell Design Week; an e-commerce studio taking 40 units of natural cosmetics to a pop-up store in Shoreditch; an artisan blacksmith from Podkarpacie taking individual pieces to a Manchester gallery; a ceramicist exhibiting at London's Collect fair. For each of them, the cost of a full CDS clearance for a single suitcase would be disproportionate to the value — MIB solves that problem.
| Criterion | MIB threshold | What it means in practice |
|---|---|---|
| Customs value | ≤ £1,500 | Net commercial invoice price + freight + insurance to the UK border |
| Gross weight | ≤ 1,000 kg | Almost always met with a suitcase — the limit exists for small-van deliveries |
| Mode of transport | Passenger | Plane, Eurostar, private car, ferry as a foot/car passenger. NOT: your own van or lorry in commercial mode |
| Type of goods | Non-controlled | No excise, no SPS, no CITES, no dual-use, no weapons, no medicines |
The £1,500 figure is customs value, not retail price. If you have 10 units at £160 each + £50 freight = £1,650 → already outside MIB. Source: HMRC guidance — value thresholds.
For each of the above categories the full route kicks in: pre-lodgement declaration in CDS, often permits (MHRA, APHA, Border Force), sometimes T1 transit, sometimes an ENS. Don't try to work around it — the cost of a penalty for misclassification at the Red Channel is typically 2–3× higher than the cost of a proper clearance through an agent.
Since 2021, HMRC has maintained a dedicated online form at gov.uk/bringing-commercial-goods-into-great-britain-in-your-baggage. Below is the real sequence from the perspective of a Polish business owner flying into Heathrow.
The form is in English and requires a Government Gateway login (if you have a GB EORI) or an ad-hoc registration. You enter:
The system calculates import VAT (standard 20%) and duty per the UK Global Tariff. You pay online by card. Keep the MIB reference — that's your proof at the border and for the Polish tax office.
Regardless of whether you filled in the declaration online in advance — at the terminal you go through the Red Channel. There a Border Force officer:
Source: UK Border Force — arriving in the UK, declaring goods.
Customs value is not the same as selling price or purchase invoice price. The UK uses the transaction method: price paid or payable + adjustments. For a Polish firm flying goods to the UK, the elements are:
Example: a Polish jewellery maker brings 15 pendants at £80 net to a pop-up in London. Goods value: £1,200. No freight (personal baggage), no insurance. Customs value = £1,200 → fits inside MIB. Import VAT 20% = £240. Duty per HS code for silver: check preferential origin; under the UK–EU TCA with a correct statement on origin — 0% duty. Total cost: £240 VAT + your own time. Without MIB: agent clearance £70–85 + the same VAT. Saving: £70–85.
Second example: the same maker has 22 pendants at £80 = £1,760 customs value → outside the MIB threshold. The gov.uk system will block the declaration. The full route is required: PL export with IE-599, UK import on CDS via an agent.
| Terminal | Where the Red Channel is | Specifics |
|---|---|---|
| Heathrow (T2, T3, T4, T5) | After baggage reclaim, before the exit — "Goods to declare" sign | Most formalised; the Red Point Phone is always available if an officer is not present |
| Stansted | Directly after the baggage hall | Often lightly staffed at night — use the Red Point Phone |
| Dover (ferry passenger) | After leaving the ferry, on exit from the port | Pull over at "UK Customs check" — do not drive into the green lane |
| Channel Tunnel / Folkestone | Cheriton terminal, before boarding LeShuttle → "UK controls" area | PRE-departure control — you must declare BEFORE entering the UK, not after |
| St Pancras (Eurostar) | Customs point at the platform exit | Rarely used for MIB — needs flagging to the train manager |
The EasyClearance team advises clients driving a private car with samples through the Channel Tunnel to always complete the MIB online at least 24 h in advance and carry a printed PDF confirmation — the pre-entry control on the French side is strict, and "I'll do it on the spot on my phone" often ends with being turned back into a holding area and a 2-hour delay.
UK MIB is only half the puzzle. For the Polish tax office to recognise the movement as a 0% VAT export, you need the Polish IE-599 document from an export declaration on PUESC. If the export is not declared on the Polish side, HMRC accepting the goods in the UK is irrelevant — the tax office will treat the goods as not exported and add back 23% VAT.
Two options for baggage:
More in our pillar: Exporting PL → UK — complete guide and No IE-599 — what to do?.
Samples have a customs value. Even if you are not selling them in the UK, a Border Force officer expects a pro-forma invoice with a realistic market value. Writing "sample value £1" for a suitcase of £800 worth of cosmetics = suspicion of VAT evasion.
MIB does not apply when the mode of transport is commercial. If you have a Polish company-branded van, then even with £200 of goods you must follow the full route: Polish export declaration, GMR via GVMS UK, UK import declaration. A commercial van driver without a GMR will not board the ferry or pass through the Channel Tunnel.
That's no longer a UK import — but there's a potential Polish intra-Community acquisition/reverse import issue on the way back. A separate topic; don't confuse it with MIB.
Perfume = alcohol = excise. A whisky sample for a UK client = excise. A bottle of liqueur as a "gift" for a trading partner = excise. These goods exclude MIB. The only route: full declaration + Excise Duty calculation. See Importing alcohol from the UK — excise and duty.
A common scenario: you take 20 samples to a Birmingham trade fair, sell 12, come back with 8. What about those 8 from a customs perspective? Three options:
The EasyClearance team advises: if you always come back with more than 50% of the goods, consider an ATA Carnet instead of MIB. The carnet cost (~£180–300 + deposit) often pays for itself on the second trip because you don't pay UK import VAT. MIB is more cost-effective when your trip is a one-way sale (the goods stay with the UK buyer for good).
| Item | Amount (typical) |
|---|---|
| UK import VAT (20% on customs value + duty) | ~£300 on £1,500 |
| UK duty (per HS code; often 0% thanks to the UK–EU TCA) | £0–£150 |
| Online declaration fee | £0 (gov.uk) |
| EasyClearance advice (HS classification, threshold check, invoice preparation) | from £55 / filing |
| Cost of an error (penalty for understated value) | 2–3× the original VAT + goods detained |
Compared with a full CDS clearance (for value > £1,500): add the agent fee £70–£85, GMR £0, occasional ENS £50 — see Cheap UK customs clearance — how to choose an agent.
Yes — provided customs value ≤ £1,500, weight ≤ 1,000 kg, you're travelling in a passenger vehicle, and the goods are not controlled or excise. Then you complete the MIB online declaration at gov.uk.
£1,500 customs value (commercial invoice + freight + insurance to the UK border). Above — a full CDS declaration through an agent.
Yes, if you're travelling in a passenger car as a passenger. The declaration must be submitted ONLINE before entry, and at the terminal you choose the UK customs route.
Yes. They must carry a pro-forma invoice with a realistic market value. "Sample value £0" is not accepted by Border Force.
With excise, SPS (meat/dairy/plants), CITES, dual-use, medicines, value > £1,500, weight > 1,000 kg, commercial transport (van/lorry). Each of those cases requires a full CDS declaration.
For a one-off low-value import — not always. For regular activity (for example monthly trips with samples) a GB EORI is essential and simplifies the process. See GB EORI — how to get one.
You need the IE-599 document from the Polish AES system plus the UK MIB reference. The UK MIB alone is not enough — the export must be declared on the Polish side.
Border Force can reassess the customs value. Your defence: a detailed invoice with market prices, proof of payment (transfer, contract), and optionally correspondence with the UK buyer. Understating value is the single most common reason for penalties and goods being detained at the Red Channel.
Merchandise in Baggage is a real, legal and low-cost route for Polish small businesses taking samples, business gifts or a small stock run to a UK trade fair. It works if you stay inside the four limits (£1,500, 1,000 kg, passenger vehicle, non-controlled goods) and you submit the online declaration on gov.uk before entry. Outside those limits there are no "shortcuts"; a full CDS declaration and a customs agent are mandatory, and the penalty for trying to avoid them usually exceeds the cost of doing it properly.
The EasyClearance team helps Polish businesses at both ends: the Polish export filing (IE-599) + MIB, or a full UK import clearance. If you're not sure which route you fall into — drop us a line and we'll check it in 30 minutes.