EU VAT for E-Commerce Sellers: IOSS, OSS, and the 2021 Rules Explained

If you sell goods to customers in the European Union — whether from the US, UK, China, or anywhere else — EU VAT is your problem. The rules changed dramatically on July 1, 2021, abolishing the old €22 VAT exemption and introducing two new schemes: IOSS and OSS.

Many e-commerce sellers still don't understand these rules, which is why packages get held at customs, customers face unexpected charges at delivery, and sellers lose business to competitors who get it right. This guide explains exactly what changed, what you need to do, and the practical implications for your business.

Before July 2021: the old rules

Before the reform, the EU had a de minimis VAT threshold of €22. Goods imported from outside the EU with a value below €22 could enter without VAT. This threshold was widely abused — sellers would systematically undervalue shipments, and cross-border competition was distorted because EU-based sellers had to charge VAT while non-EU sellers often didn't.

For goods above €22 but below €150, the importer (often the customer) had to pay VAT at the border, usually collected by the postal operator or courier. This created a terrible customer experience: buyers received unexpected bills days after ordering, often refusing delivery.

For goods above €150, normal import procedures applied: customs declaration, duty assessment, and VAT payment.

What changed on July 1, 2021

The EU overhauled its VAT rules for e-commerce with four major changes:

1. Abolished the €22 VAT exemption All goods imported into the EU are now subject to VAT, regardless of value. There is no minimum threshold. A €5 keyring from an overseas seller now attracts VAT.

2. Introduced IOSS (Import One Stop Shop) for B2C shipments up to €150 Sellers can register for IOSS in one EU member state and collect VAT at the point of sale for all EU countries. The goods then clear customs without additional VAT collection at the border.

3. Introduced OSS (One Stop Shop) for EU-to-EU B2C sales EU-based sellers can register for OSS to handle VAT on cross-border sales within the EU through a single registration, instead of registering in every member state.

4. Made online marketplaces "deemed suppliers" For goods sold through marketplaces like Amazon, eBay, and Zalando, the marketplace is now responsible for collecting and remitting VAT — not the seller. This shifted enormous compliance burden to platforms.

IOSS: Import One Stop Shop

IOSS is the key scheme for non-EU sellers shipping goods to EU customers.

How it works: You register for IOSS in one EU member state (or use an IOSS intermediary if you're outside the EU). When a customer orders, you charge them VAT at the rate of their country — just like a domestic retailer would. You display the VAT-inclusive price at checkout. The goods are then imported using your IOSS number, and customs clears them without collecting VAT at the border (because you've already collected it). You then file a monthly IOSS return and pay the collected VAT to your registration country, which distributes it to the relevant member states.

The €150 limit: IOSS only applies to individual consignments with an intrinsic value of €150 or less. "Intrinsic value" means the value of the goods themselves, excluding transport and insurance. If a single shipment exceeds €150, IOSS cannot be used and normal import VAT procedures apply.

Who needs IOSS: - Non-EU sellers shipping directly to EU consumers - EU sellers shipping from outside the EU to EU consumers - Anyone whose goods are sold B2C in the EU at consignment values up to €150

How to register for IOSS

If you're based outside the EU: You cannot register for IOSS directly — you must appoint an EU-based IOSS intermediary. The intermediary registers on your behalf, files returns, and is jointly liable for VAT. This is a regulatory requirement, not optional.

IOSS intermediaries are typically tax advisors, accountants, or specialist compliance services. Costs vary from €50-500/month depending on volume and complexity.

If you're based in the EU: You can register directly through your national tax authority's IOSS portal. The EU has a unified IOSS registration system that gives you a single IOSS number valid across all 27 member states.

After registration: - You receive an IOSS number (format: IMxxxyyyyyyyyyy) - Include this number on all customs declarations for qualifying shipments - File a monthly VAT return (even in months with zero sales) - Pay VAT monthly — the registration country distributes to member states

Important: Your IOSS number is sensitive. Carriers and customs agents use it to clear shipments. Do not share it publicly.

What happens without IOSS

If you ship to EU customers without IOSS, one of two things happens:

Option 1: The courier/postal service collects VAT at delivery The carrier acts as the importer, pays VAT at the border, and then charges the customer upon delivery (plus a handling fee, often €5-15). The customer receives a surprise bill. Many customers refuse delivery, leaving you with return shipping costs and a lost sale.

Option 2: The customer clears customs themselves For postal shipments, customers may receive a customs notice and must pay VAT plus a postal handling fee before collecting their parcel. This is a terrible customer experience and a common reason for negative reviews.

Neither option is acceptable in a competitive market. If you sell in the EU without IOSS, you're at a structural disadvantage versus competitors who offer VAT-inclusive pricing.

OSS: One Stop Shop for EU-to-EU sales

OSS is designed for EU-based sellers making cross-border sales within the EU. Before OSS, if an EU seller exceeded the distance selling threshold (€10,000 per year across all EU countries), they had to VAT-register in each destination country.

OSS eliminates this burden. An EU seller registers for OSS in their home country and uses that single registration for all intra-EU B2C sales. They file one quarterly OSS return covering all EU sales, and the tax authority distributes the VAT to the relevant countries.

The €10,000 threshold: EU sellers below €10,000 in cross-border B2C sales per year can apply their home country VAT rate to all EU sales. Above €10,000, they must use destination country VAT rates (either through OSS or individual registrations).

OSS does not cover: - Imports from outside the EU (that's IOSS) - B2B sales (those use reverse charge) - Goods subject to special procedures (excise goods, etc.)

Marketplaces: Amazon, eBay, and the deemed supplier rules

For sellers using online marketplaces, the 2021 reform made the marketplace the "deemed supplier" for VAT purposes in two scenarios:

1. Non-EU seller, goods shipped from outside EU, value ≤ €150: The marketplace collects and remits VAT. The seller's revenue is VAT-exclusive.

2. Any seller, goods in EU fulfillment centres (e.g. Amazon FBA), shipped B2C: The marketplace collects and remits VAT.

What this means in practice: - If you're a non-EU seller using Amazon FBA in Europe, Amazon handles EU VAT collection and remittance for B2C sales - You still need your own VAT registrations for B2B sales, sales from your own website, or situations where the deemed supplier rules don't apply - Marketplace VAT compliance does not replace your obligations for non-marketplace sales

Amazon's VAT Services: Amazon offers a VAT Services program that handles VAT registration and filing in multiple EU countries for FBA sellers. If you're doing significant FBA volume, this is worth investigating.

Common mistakes and how to avoid them

1. Undervaluing goods to stay under €150 Customs authorities actively screen for systematic undervaluation. Penalties are severe. The €150 IOSS threshold is based on the genuine intrinsic value of goods.

2. Not including IOSS number on customs declarations If your IOSS number is missing from the customs declaration, the parcel will be treated as a non-IOSS shipment and VAT will be collected at delivery. Brief your logistics provider carefully.

3. Using one IOSS number for multiple sellers Each seller must have their own IOSS number. Sharing IOSS numbers between unrelated businesses is illegal.

4. Shipping a single order as multiple parcels to stay under €150 Customs authorities are aware of this practice. If a single order is split into multiple packages from the same seller to the same customer, the €150 threshold is assessed on the total order value.

5. Ignoring OSS once you exceed €10,000 If your total intra-EU cross-border B2C sales exceed €10,000 in a calendar year, you must apply destination country VAT rates. Using your home country rate on all sales above this threshold is incorrect.

UK VAT after Brexit

The UK left the EU VAT system on January 1, 2021 — six months before the EU reformed its own rules. The UK has its own parallel system:

Under £135 imports B2C: Overseas sellers must register for UK VAT and collect it at point of sale (same logic as EU IOSS, but no separate "scheme" — it's a standard UK VAT registration with simplified import rules for sub-£135 goods).

Over £135: Normal UK import procedures apply. The buyer pays import VAT (and potentially customs duty) at the border.

Marketplaces: For goods sold through UK marketplaces (eBay, Amazon, etc.) by overseas sellers, the marketplace is responsible for UK VAT — same deemed supplier logic as the EU.

A non-EU seller operating in both EU and UK markets needs: IOSS registration (or intermediary) for EU, plus separate UK VAT registration. These are entirely separate systems.

Key takeaways

- The €22 VAT exemption was abolished July 1, 2021 — all EU imports are now subject to VAT - IOSS lets non-EU sellers collect EU VAT at checkout and clear customs without border VAT collection — for B2C shipments up to €150 - Non-EU sellers must appoint an EU IOSS intermediary to register - Without IOSS, customers face surprise charges at delivery — damaging conversion and reviews - OSS simplifies intra-EU cross-border VAT for EU sellers above the €10,000 threshold - Amazon and major marketplaces handle VAT as "deemed suppliers" for qualifying sales - The UK has its own parallel system (not IOSS) for imports under £135 - Customs classification (HS code) determines whether goods are zero-rated or standard-rated VAT — misclassification can mean overpaying or underpaying VAT