The practical answer

For goods sent to Great Britain in a consignment worth GBP 135 or less, the overseas seller is meant to charge UK VAT at the point of sale and no Customs Duty is due on non-excise goods. Above GBP 135, normal import rules apply: the carrier collects import VAT, and Customs Duty where the tariff sets one, before delivery. A VAT-registered lab that gives the seller its VAT number on a small order accounts for the VAT itself instead.

Evidence, method & source dates ↓

What this guide covers and what it does not

This is the money side of buying from outside the UK. Whether a product can lawfully be sold or imported at all is a separate question, covered in the site's guide to UK rules for research peptides. Here we follow GOV.UK and HMRC pages read on 30 October 2026 to work out who charges VAT, when duty appears, what the carrier bills and which reliefs a research institution might use. [1] [2]

We did not place an import order or receive a carrier bill, and Royal Mail's and Parcelforce's fee pages are not quoted here, so this guide gives no handling-fee amount; check those carriers' fee pages. GOV.UK says the carrier sends a bill listing the exact fees, so budget for a fee line you will only see on that bill. [2] Rules differ for Northern Ireland; the figures below are for Great Britain unless stated.

The GBP 135 line: who charges VAT

The GBP 135 limit applies to the whole consignment, not each item. GOV.UK defines the value as the intrinsic value: the price the goods were sold for, excluding transport and insurance unless they are built into the price and not shown separately on the invoice. Unless items are sent separately, the seller adds the values of everything in the parcel together. [1]

At or under GBP 135 into Great Britain, the seller must charge and account for UK VAT at the point of sale. No Customs Duty is charged on non-excise goods at that value. [1] [2] Above GBP 135, normal VAT and customs rules apply at import, and you pay the VAT before delivery or when you collect the parcel. [1] [2]

Northern Ireland is different. The GOV.UK VAT page describes separate treatment for consignments of GBP 135 or less sent there from outside the UK and EU, and its wording on who accounts for that VAT is not fully consistent, so confirm with the seller. Customs Duty in Northern Ireland also depends on whether the courier treats the goods as at risk of entering the EU; for a business recipient, at-risk goods are charged the EU rate at any value unless a relief or waiver is claimed. [1] [2]

Situation (Great Britain)Who accounts for VATCustoms DutyWhat you see at the door
Consignment at or under GBP 135, private or non-registered buyerSeller, at the point of sale [1]None on non-excise goods [2]Nothing to pay if the seller charged VAT
Consignment at or under GBP 135, buyer gives a UK VAT numberBuyer, by reverse charge; seller does not charge VAT [1]None on non-excise goods [2]Nothing to pay at the door
Consignment over GBP 135Import VAT collected at the border [1] [2]Charged at the tariff rate for the goods and their origin [2]Carrier bill for VAT, duty and any fee; parcel held about 3 weeks [2]
Gift worth GBP 39 or lessNo VAT [2]Not relevant for a purchaseNot applicable to a lab purchase

How VAT and duty are calculated above GBP 135

GOV.UK gives the order of calculation. Customs Duty is charged on the price paid for the goods plus postage, packaging and insurance. VAT is then charged on the total: goods, postage, packaging, insurance and any duty owed. [2] The standard VAT rate is 20 percent. [3] Duty rates depend on the type of goods and where they originate; GOV.UK points to the Trade Tariff service to look them up. [2] The tariff page is not quoted here, so the examples below carry duty as a variable rather than a number; look up your rate in the Trade Tariff service.

Origin matters as well as the dispatch country. Under the UK-EU Trade and Cooperation Agreement, a reduced rate of Customs Duty applies only to goods that originate in the EU and meet the agreement's conditions. The importer claims it with a statement on origin that the exporter adds to the invoice, or with the importer's own knowledge. If the importer cannot supply the information HMRC asks for, the preference claim can be denied and the reduced rate does not apply. A claim can also be made after import, within 3 years, with valid proof of origin. [4] A parcel shipped from an EU warehouse is not automatically EU-origin.

If you overpay, GOV.UK names the refund routes: form BOR 286 when Royal Mail or Parcelforce delivered the goods, form C285 for other couriers. [2]

Worked examples

Example A, small order from a US seller to a university lab in England. Goods GBP 120, delivery GBP 20 shown separately. The intrinsic value is GBP 120, so the consignment is under the limit. The seller should charge UK VAT at sale. Where delivery is part of the same contract, VAT on the delivery charge follows the goods, so 20 percent on GBP 140 is GBP 28 and the invoice total is GBP 168. [1] [3] [5] No duty, and nothing should be due at the door. If the lab is VAT-registered and gives its number, the seller charges no VAT and the lab accounts for it by reverse charge. [1]

Example B, larger order from an EU seller. Goods GBP 400 plus GBP 30 shipping and insurance, so the GBP 135 limit is exceeded. Duty base: GBP 430. If the tariff rate for the goods is r percent and no origin preference is claimed, duty is GBP 4.30 times r. VAT is 20 percent of (GBP 430 plus duty). At a zero duty rate, VAT is GBP 86 and the carrier bill is GBP 86 plus any fee the carrier lists. [2] [3] If the goods are EU-origin and the invoice carries a valid statement on origin, a reduced duty rate may apply; VAT still applies. [4]

The difference between the two examples is who pays VAT, and when. In A the seller has collected VAT before dispatch. In B, VAT is collected at the border, and the parcel waits until someone pays.

LineExample A (GBP 120 goods)Example B (GBP 400 goods)
Value tested against GBP 135120 (delivery shown separately) [1]400 [1]
Duty baseNo duty on non-excise goods [2]430 (goods, postage, insurance) [2]
Duty04.30 x tariff rate r [2]
VAT at 20 percent28, charged by the seller [3] [5]86 at r = 0, collected at import [2] [3]
Paid at the doorNothing expectedVAT, duty and any carrier fee on the bill [2]

Reliefs research institutions ask about

Scientific instruments relief: GOV.UK offers relief from Customs Duty and VAT for scientific instruments and apparatus imported for non-commercial research or education. Universities, NHS teaching hospitals, approved colleges and public health laboratories do not need prior approval; other bodies apply to the National Imports Reliefs Unit first. The relief covers instruments, apparatus, and their spare parts and tools. The page does not mention chemicals or reagents, and it says VAT relief applies only to goods used for medical or veterinary research, training, diagnosis or treatment, with a separate declaration. [6] Do not assume a peptide is an instrument.

Charity-funded equipment, VAT Notice 701/6: zero rating for eligible bodies, including non-profit research institutions, when the purchase is paid for with charitable or donated funds. The notice says chemical reagents used up in operating equipment are not equipment and do not qualify, though substances directly used for testing or mixing may fall under a separate relief for certain charities. It also applies to imports, with the importer lodging a declaration of eligibility at import. [7] Ask your finance office before relying on either route for consumables.

Records: the scientific instruments relief page says to keep records for at least 4 years, and the UK-EU origin guidance says the same for origin records. [4] [6]

Questions to put to a supplier before you order

Peptides EU is one example of why these questions matter. Its FAQ lists the United Kingdom as a destination, but its shipping page describes only intra-EU delivery without customs clearance and gives no UK rate or import-charge wording. [8] [9] A UK order from it is an import, and the page we read does not say who pays the charges.

  • For orders at or under GBP 135: are you registered to charge UK VAT, and will the invoice show it?
  • Will delivery and insurance appear as separate lines on the invoice?
  • For orders over GBP 135: who is the importer, and will you ship duties-unpaid or duties-paid?
  • Can you add a statement on origin to the invoice, and in which country were the goods made?
  • Will you split one order into several parcels? (Values are added together unless items are sent separately.) [1]
  • Which carrier delivers in the UK, so you know whose bill and fee to expect?

Questions before you decide

Do I pay VAT at the door on a lab order under GBP 135?

Not in Great Britain if the seller charged UK VAT at sale, which GOV.UK says the seller must do for consignments of GBP 135 or less. The carrier collects VAT only on purchases above GBP 135, gifts above GBP 39 and excise goods.

Does shipping count towards the GBP 135 limit?

Not when shown separately on the invoice. GOV.UK defines the value as the price of the goods, excluding transport and insurance unless they are built into the price and not shown separately.

Can a university avoid import VAT on peptides?

Not by default. The scientific instruments relief covers instruments and apparatus, and Notice 701/6 says chemical reagents consumed in operation are not equipment. A VAT-registered body can account for VAT by reverse charge on small orders, and your finance office should confirm any relief before you order.

Check the underlying evidence

Sources & review dates

Sources are documentary evidence. They do not establish firsthand testing of a listed supplier.