Ecommerce Finance

IOSS and OSS for UK sellers: which scheme applies, and the GB vs NI split that rival content gets wrong.

The EU introduced IOSS and OSS in July 2021 to simplify VAT compliance for cross-border e-commerce into and within the EU. The two schemes are frequently confused in seller content, and the GB-vs-NI split is the most common error: <a href="https://www.gov.uk/guidance/register-to-report-and-pay-vat-on-distance-sales-of-goods-from-northern-ireland-to-the-eu">OSS</a> is a Northern Ireland mechanism for NI-to-EU distance sales; GB sellers do not distance-sell under OSS. <a href="https://www.gov.uk/guidance/check-if-you-can-register-for-the-vat-import-one-stop-shop-scheme">IOSS</a> is the relevant scheme for GB sellers shipping low-value consignments to EU consumers, and GB sellers must use an EU-established fiscal intermediary to register. Getting the wrong scheme, or assuming the other party handles it, creates unaccounted EU VAT obligations.

Key considerations.

IOSS in plain English: single registration for low-value EU consignments from outside the EU

<a href="https://www.gov.uk/guidance/check-if-you-can-register-for-the-vat-import-one-stop-shop-scheme">IOSS (the Import One Stop Shop)</a> lets a business register once to account for import VAT on low-value B2C consignments shipped from outside the EU to EU consumers, rather than registering separately in each member state where a consumer buys. IOSS is optional: without it, EU import VAT is collected from the consumer at the border, typically with a customs clearance fee added. Sellers using IOSS collect the destination country's VAT at checkout and remit it via the single IOSS registration.IOSS applies to consignments of an intrinsic value not exceeding <a href="https://vat-one-stop-shop.ec.europa.eu/one-stop-shop_en">€150, the ceiling set by EU law</a>. Do not confuse it with the UK's £135 import rule, which is a different figure in a different jurisdiction: the <a href="https://www.gov.uk/guidance/check-if-you-can-register-for-the-vat-import-one-stop-shop-scheme">gov.uk IOSS page</a> covers the UK and NI side of the picture.

Why GB sellers need an EU-established fiscal intermediary for IOSS

<a href="https://www.gov.uk/guidance/check-if-you-can-register-for-the-vat-import-one-stop-shop-scheme">HMRC confirms</a> that businesses established outside the EU (including in Great Britain) must appoint an EU-established fiscal intermediary to register for IOSS and file on their behalf. The intermediary assumes joint and several liability for the VAT. Intermediary fees add to the cost of IOSS compliance, so whether IOSS is cost-effective depends on your EU B2C volume, average order value relative to the €150 ceiling, and the administrative cost of the alternative (per-country import VAT collected at the border from the consumer).

OSS and Northern Ireland: the correct split

Northern Ireland's dual EU/UK VAT status under the Windsor Framework means that goods moving from Northern Ireland to EU consumers qualify as intra-EU distance sales for VAT purposes. <a href="https://www.gov.uk/guidance/register-to-report-and-pay-vat-on-distance-sales-of-goods-from-northern-ireland-to-the-eu">HMRC's OSS guidance</a> confirms that NI sellers can use the OSS Union scheme to report and pay VAT on those NI-to-EU distance sales once they exceed <a href="https://www.gov.uk/guidance/check-how-to-report-and-pay-vat-on-distance-sales-of-goods-from-northern-ireland-to-the-eu">the £8,818 (€10,000) a year distance-selling threshold</a>.GB sellers are outside the EU. Goods shipped from Great Britain to EU consumers cross an EU external border; they are imports into the EU, not intra-EU distance sales. OSS does not apply to GB sellers' EU sales. This is the most common error in rival content on this topic.

EORI numbers: GB for GB movements, XI for NI movements

<a href="https://www.gov.uk/eori">An EORI (Economic Operators Registration and Identification) number</a> is required to move goods into or out of the UK. A GB EORI (prefix GB) covers movements involving Great Britain. An XI EORI (prefix XI) is needed for movements involving Northern Ireland. Sellers who ship to the EU from both GB and NI warehouses may need both. The XI EORI is also relevant to the OSS/NI position: it identifies the NI goods movement for customs and VAT purposes.

How we help.

IOSS vs OSS vs country-by-country assessment

We assess your EU sales volumes, consignment values and fulfilment model to identify the correct approach for your EU VAT obligations and whether IOSS, OSS (for NI sellers) or country-by-country registration is the right route. Service: <a href="/services/selling-into-the-eu">selling into the EU</a>.

IOSS intermediary coordination for GB sellers

We coordinate IOSS registration with an EU-established fiscal intermediary, advise on the monthly IOSS return data requirements and review checkout pricing for VAT-inclusive accuracy across EU destination countries.

OSS assessment and compliance for Northern Ireland sellers

We assess OSS eligibility and registration for Northern Ireland sellers with NI-to-EU distance sales, including the EORI requirements and the NI-specific VAT accounting position. See also: <a href="/vat/deemed-supplier-establishment">establishment status</a>.

Common questions

What is the difference between IOSS and OSS?

IOSS (Import One Stop Shop) is for sellers outside the EU shipping low-value goods to EU consumers: one registration covers import VAT across all EU member states. OSS (One Stop Shop) Union scheme is for intra-EU distance sales: goods that start in one EU country and are sold to consumers in another. GB sellers are outside the EU and ship as imports, so IOSS is their scheme (if they use one); OSS is an NI mechanism for NI-to-EU distance sales.

Do I need IOSS as a UK (GB) seller?

It is optional, not mandatory. Without IOSS, EU import VAT on your low-value consignments is collected from the consumer at the EU border, typically with a clearance fee. Using IOSS lets you include EU VAT in the checkout price, which improves conversion for EU buyers. Whether it is cost-effective depends on your EU volume and the intermediary fee. <a href="https://www.gov.uk/guidance/check-if-you-can-register-for-the-vat-import-one-stop-shop-scheme">HMRC IOSS guidance</a>.

Do I need an EU intermediary for IOSS?

Yes. GB-established sellers (established outside the EU) cannot register for IOSS directly; they must appoint an EU-established fiscal intermediary who registers and files on their behalf. The intermediary assumes joint liability for the VAT. <a href="https://www.gov.uk/guidance/check-if-you-can-register-for-the-vat-import-one-stop-shop-scheme">Source: HMRC</a>.

Can a Great Britain seller use OSS?

No. EU OSS covers intra-EU distance sales: goods moving from one EU country to a consumer in another. GB is outside the EU; goods shipped from Great Britain to EU consumers are imports, not intra-EU distance sales. IOSS is the relevant simplification scheme for GB sellers' low-value EU consignments.

Does OSS apply to Northern Ireland sellers?

Yes. NI's dual EU/UK VAT status means NI-to-EU sales of goods qualify as intra-EU distance sales. <a href="https://www.gov.uk/guidance/register-to-report-and-pay-vat-on-distance-sales-of-goods-from-northern-ireland-to-the-eu">HMRC confirms</a> that NI sellers can use OSS to report those sales once they pass <a href="https://www.gov.uk/guidance/check-how-to-report-and-pay-vat-on-distance-sales-of-goods-from-northern-ireland-to-the-eu">£8,818 (€10,000) a year</a> of distance sales to EU consumers.

Do I need a GB or XI EORI number?

A GB EORI is needed for GB import and export movements. An XI EORI is needed for movements involving Northern Ireland. Sellers shipping from both GB and NI locations may need both. <a href="https://www.gov.uk/eori">Apply for an EORI number on gov.uk</a>.