IOSS Registration: The Complete Guide for Non-EU Sellers Selling to Europe

Since July 2021, selling low-value goods to EU consumers without an IOSS (Import One-Stop Shop) number has become significantly more complicated — and significantly more expensive for your customers. Packages arriving at EU borders without an IOSS number face import VAT charges plus customs handling fees at delivery, creating exactly the kind of friction that kills conversion rates and generates negative reviews.

If you ship goods from outside the EU to European customers — whether directly from China, from a UK warehouse, from the US, or through any third-party logistics provider outside EU borders — IOSS is almost certainly relevant to your business.

What Is IOSS and Why Was It Created?

Before July 2021, goods valued under €22 imported into the EU were exempt from VAT. This created a massive competitive imbalance: non-EU sellers (primarily from China) could offer products VAT-free at prices that EU-established businesses — who had to charge 20% or more — could not match.

The EU abolished the €22 exemption as part of the 2021 VAT e-commerce package. Now, all goods imported into the EU are subject to VAT from the first euro. To simplify the collection of this VAT for low-value consignments (under €150), the Import One-Stop Shop was created.

With IOSS, the seller collects VAT at checkout using the customer's country's VAT rate, declares it monthly via a single IOSS return, and the package is released at EU customs without further VAT charges. The customs declaration references the IOSS number as proof that VAT has been accounted for.

IOSS vs OSS: What's the Difference?

Who Must Register for IOSS?

IOSS is technically optional — but the alternative is considerably worse for your customer experience. Without IOSS, each package must be individually assessed at the EU border, import VAT is charged to the recipient at delivery (along with a handling fee from the courier, typically €5–€25 per parcel), and delivery times extend significantly.

As a practical matter, any seller shipping goods valued under €150 directly to EU consumers from outside the EU should have IOSS if they want a competitive customer experience.

You must use IOSS if:

• You sell via a marketplace (Amazon, eBay, Etsy, etc.) and ship directly from outside the EU — unless the marketplace has its own IOSS number (see below)
• You sell via your own website (Shopify, WooCommerce, etc.) and ship from outside the EU
• You use a fulfilment centre outside the EU (including UK, US, and China) to ship to EU customers

You do NOT need IOSS if:

• All your goods are already in the EU before sale (use OSS or local registrations instead)
• Your goods are valued over €150 per consignment (standard import rules apply)
• You sell exclusively via a major marketplace that uses its own IOSS number and handles VAT collection on your behalf (Amazon does this for FBA sellers in many cases — check your specific setup)

Benefits of IOSS for Marketplace Sellers

For sellers shipping directly from outside the EU (not using Amazon FBA in the EU), IOSS provides significant competitive advantages:

Seamless customs clearance. Packages with a valid IOSS number clear customs automatically in most EU countries. No delays, no customs examination queues, no additional charges for the customer.

Competitive pricing. You display the total price including VAT at checkout — what the customer sees is what they pay. Competitors without IOSS surprise their customers with unexpected charges at delivery, leading to returns, refusals, and negative reviews.

Faster delivery times. Customs clearance with IOSS is typically same-day to next-day. Without IOSS, packages can be held for 3–10 business days for VAT assessment.

Single monthly return. Instead of VAT registrations in 27 EU countries (or wherever your customers are), you file one IOSS return per month covering all EU destination countries.

How to Register for IOSS: Step-by-Step

Non-EU sellers registering for IOSS must appoint an EU-established intermediary to act on their behalf. The intermediary is jointly and severally liable for IOSS VAT obligations — they take on legal responsibility for ensuring your returns are filed and VAT is paid. This is a significant responsibility, which is why finding a reputable IOSS intermediary matters.

EU-established sellers can register for IOSS directly without an intermediary, but most use a service provider for the administrative convenience.

Registration process:

1. Choose your EU registration country. As a non-EU seller, you can register in any EU member state. Ireland and the Netherlands are popular because of their efficient online registration systems and English-language services.
2. Select an IOSS intermediary established in your chosen registration country. Your intermediary will typically handle the registration on your behalf.
3. Complete the registration application via the relevant country's tax portal (e.g., Revenue Online Service in Ireland). Required information includes: business name, address, country of establishment, tax identification number, bank account, and estimated annual sales to EU consumers.
4. Receive your IOSS number. This is issued within 1–3 weeks in most countries. It takes the format IM + country code + 12 digits (e.g. IMIE0000000001 for Ireland).
5. Configure your systems. Add the IOSS number to your shipping labels, customs declarations, and checkout/invoicing system. Your courier needs the IOSS number on every applicable shipment.
6. Start collecting VAT at checkout. Apply the VAT rate of each EU customer's country to their order total. Most e-commerce platforms (Shopify, WooCommerce) support this natively or via plugins.

Monthly IOSS Reporting: What's Required

IOSS returns are due monthly — by the last day of the month following the reporting month (so January sales are due February 28/29, February sales are due March 31, etc.).

Each monthly IOSS return must report, for each EU destination country:

• Total value of goods sold to consumers in that country (excluding VAT)
• Applicable VAT rate
• VAT collected
• Number of transactions (in some countries)

Payment of the VAT shown on the return is due on the same date. IOSS does not allow payment by instalments — the full amount must be remitted by the monthly deadline.

Record-keeping requirement: IOSS sellers must keep records of all IOSS transactions for 10 years. These records must be available electronically upon request from any EU member state tax authority (not just the registration country). Records must include: description of goods, destination country, date of sale, VAT rate applied, VAT amount, customer details, and customs declaration reference.

Common IOSS Errors (and How to Avoid Them)

• Using the IOSS number for goods over €150. IOSS applies only to consignments under €150. If you split a €200 order into two parcels of €100 each to "game" the limit, this is specifically prohibited and detectable by customs authorities. Each consignment value must reflect the actual goods in that shipment.
• Applying wrong VAT rates. You must use the destination country's VAT rate, not a single universal rate. Different EU countries apply different rates, and some products (food, books, medicine) qualify for reduced rates in some countries but not others. Using the wrong rate creates discrepancies that trigger audits.
• Not including the IOSS number on customs declarations. The IOSS number must appear on the electronic customs declaration (CN22/CN23 equivalent in the new system) for every applicable shipment. Many sellers have the number but fail to configure their shipping labels correctly.
• Forgetting goods excluded from IOSS. Some goods cannot use IOSS regardless of value: excise goods (alcohol, tobacco), means of transport, investment goods, and new means of transport. These require standard customs clearance.
• Missing monthly deadlines. IOSS has zero tolerance for late returns — three consecutive late returns result in exclusion from the scheme with a two-year re-registration ban. Monthly filings must be automated or actively managed.

IOSS and Marketplace Facilitation Rules

If you sell through a major marketplace (Amazon, eBay, Etsy, Allegro, etc.), the marketplace may already be handling IOSS on your behalf under the "deemed supplier" rules.

Under EU deemed supplier rules, when a marketplace facilitates a sale of goods imported from outside the EU (value under €150), the marketplace is treated as the seller for VAT purposes. Amazon, eBay, and Etsy all have their own IOSS numbers for goods sold through their platforms.

This means: if you sell via Amazon and ship from China or another non-EU location, Amazon typically handles the IOSS VAT on those transactions — you do not need your own IOSS number for Amazon marketplace sales. However, this only applies to marketplace-facilitated sales. If you also sell via your own website and ship from outside the EU, you need your own IOSS number for those sales.

Always verify with the specific marketplace what their IOSS coverage includes — rules vary between platforms and may change.

Penalties for IOSS Non-Compliance

Non-compliance with IOSS obligations can result in:

• Exclusion from the IOSS scheme — if you miss three consecutive monthly returns, you are excluded for 2 years. Without IOSS, your packages face individual customs clearance and customer-paid import VAT, killing your EU business.
• Financial penalties per country — each EU member state can impose penalties for underpaid or incorrectly reported IOSS VAT. Rates vary from €100 (minor errors) to 20%+ of VAT due for persistent non-compliance.
• Intermediary liability — your IOSS intermediary is jointly liable for unpaid IOSS VAT. If you fail to pay, they will pursue recovery from you, and may terminate the intermediary arrangement.
• Customs detention of shipments — if customs authorities discover your IOSS number is invalid, expired, or being used for ineligible goods, shipments can be detained and customers charged additional duties at delivery.

Frequently Asked Questions

Do I need IOSS if I already have VAT registrations in EU countries?

If you ship goods from outside the EU, yes — local EU VAT registrations do not cover imported goods. IOSS is specifically for goods at the point of importation. Your local VAT registrations cover goods already in the EU (e.g. Amazon FBA stock).

Can I use the same IOSS number for multiple brands or businesses?

An IOSS number is issued to a specific legal entity. If you operate multiple businesses through different legal entities, each needs its own IOSS registration. However, if you sell multiple brands through the same company, one IOSS number covers all of them.

What exchange rate do I use for IOSS returns?

If you sell in currencies other than euros, use the European Central Bank exchange rate published on the last day of the reporting month. Most e-commerce accounting tools that support IOSS handle this automatically.

My goods are shipped from a UK warehouse. Do I need IOSS?

Yes. Goods shipped from the UK (post-Brexit, outside the EU) into the EU are imports and subject to IOSS rules if valued under €150. Many UK-based direct-to-consumer brands selling to EU customers need IOSS.

What happens to packages without IOSS when they arrive at EU customs?

Without IOSS, the package is assessed for import VAT at the border based on declared value. The customs authority issues a tax demand to the recipient (via the courier), who must pay before the package is released. The courier typically adds a handling fee of €5–€25. The customer experience is poor, and return rates on such orders are significantly higher.