Selling to EU Customers From Outside Europe? Here's How IOSS Changes Your VAT Obligations

What IOSS Replaced and Why the EU Changed the Rules

Before July 2021, low-value parcels entering the European Union from outside Europe could arrive without triggering VAT collection, as long as the shipment value sat below €22. That threshold was introduced decades ago when cross-border e-commerce barely existed. By the time the EU finally abolished it, billions of euros in VAT revenue were leaking out of the system annually, and domestic EU retailers were competing at a structural disadvantage against overseas sellers who effectively offered customers a hidden subsidy.

The July 2021 reform closed the loophole entirely. The old €22 floor was removed, meaning every commercial shipment entering the EU is now subject to VAT regardless of value. In its place, the EU introduced the Import One-Stop Shop (a registration-and-remittance mechanism designed to allow non-EU sellers to handle VAT efficiently at checkout rather than forcing EU consumers to deal with customs charges upon delivery).

The change matters enormously for customer experience. When VAT is collected at checkout via IOSS, the parcel moves through EU customs quickly because the VAT liability has already been settled. When it isn't, the parcel enters a lengthy customs clearance queue, the buyer gets an unexpected invoice from the postal carrier, and the return rate climbs. Many buyers simply refuse to pay the clearance fee and the parcel is abandoned.

The €150 Threshold: What Falls Under IOSS and What Doesn't

IOSS applies to consignments with an intrinsic value at or below €150. The intrinsic value is the value of the goods themselves: it excludes transport and insurance costs. If a single parcel contains multiple items and the combined value exceeds €150, the whole shipment falls outside the IOSS framework and must instead go through standard customs import procedures at the EU border.

This creates a practical consideration for sellers with wide product ranges. An order that combines multiple lower-cost items can quickly breach the €150 ceiling. Sellers who routinely dispatch multi-item orders at the €100 to €140 range should map their order data carefully, because a meaningful proportion of shipments will be ineligible for IOSS and will require alternative handling.

Products subject to excise duty (tobacco and alcohol) are excluded from IOSS regardless of value. These must always clear customs through standard import procedures even if the monetary threshold would otherwise place them within IOSS scope.

For guidance on how the €150 threshold compares to de minimis rules in other major markets, see e-commerce de minimis and VAT thresholds by country.

How to Register for IOSS as a Non-EU Seller

Non-EU businesses cannot register for IOSS directly with every EU member state. Instead, they must appoint an EU-based intermediary (a fiscal representative who holds a licence to register and act on the seller's behalf). The intermediary registers in a single EU member state of their choice, and that single registration covers all 27 member states. The seller remits VAT to the intermediary, who reports and pays it to the relevant national tax authority each month.

Choosing an intermediary is a commercial decision. Established freight forwarders, accountancy firms specialising in international VAT, and dedicated IOSS service providers all offer this role. Fees vary considerably, so sellers shipping moderate volumes into the EU should model the costs alongside the operational benefits before committing.

Once registered, the seller receives an IOSS identification number. This number must be included on every qualifying shipment's customs declaration. It is the signal to EU customs that VAT has been collected at source and that the parcel can proceed without further VAT assessment.

Collecting VAT at Checkout: The Technical Side

The practical mechanics of IOSS require the seller's checkout system to calculate and collect the correct EU VAT rate for the customer's member state at the time of purchase. VAT rates differ by country and by product category: the standard rate in Hungary runs above 27%, while Luxembourg sits below 17%. Some categories, including books and certain food items, attract reduced rates that vary further by country.

This means a rigid flat-rate approach to VAT collection will either overcharge some customers or undercharge others. Under-collection creates a liability gap that the intermediary and seller must cover from their own funds. Sellers using major e-commerce platforms often benefit from built-in VAT calculation logic, but sellers operating on custom storefronts need to either integrate a tax engine or use pre-built third-party middleware that handles EU rate tables.

The VAT collected must be remitted monthly regardless of the volume of sales. Even in months with very low EU revenue, the reporting obligation stands.

What Happens to Shipments Where IOSS Wasn't Applied

Parcels entering the EU without a valid IOSS number go into the standard import VAT queue. The carrier or postal operator typically acts as a customs agent, advances the VAT payment on the buyer's behalf, and then invoices the buyer for the tax plus a handling fee. That handling fee (commonly between €5 and €15 depending on the carrier) is where buyer satisfaction collapses. Customers who ordered a €30 item and receive a €40 delivery demand are unlikely to shop with that seller again.

There is no grace period. A parcel without IOSS compliance does not get any preferential treatment because the seller intends to register. The mechanism only works when the IOSS number is present on the customs declaration at the time of import.

For a detailed breakdown of the full IOSS registration and compliance workflow, the EU IOSS for non-EU sellers: cross-border VAT collection guide covers the process step by step.

Marketplace Platforms That Handle IOSS on Your Behalf

Sellers who list on major marketplace platforms (Amazon's EU stores, eBay, Etsy, and similar) may find that the marketplace itself acts as the deemed supplier for IOSS purposes. Under EU law, platforms that facilitate sales by non-EU sellers are responsible for collecting and remitting VAT on those sales. In practice, this means the marketplace collects VAT at checkout, includes its own IOSS number on outbound parcels, and handles monthly remittances without the seller needing to register separately.

This is a significant operational simplification for sellers who sell exclusively through qualifying platforms. The obligation transfers to the platform as long as the sale passes through the marketplace's payment system. However, sellers who operate both a marketplace presence and a direct-to-consumer storefront will need separate IOSS compliance for their own-channel sales, since the marketplace's IOSS number only covers transactions processed through that platform.

Record-Keeping and Monthly Reporting Obligations

IOSS registrants must maintain records of all EU sales for at least ten years. These records should detail the transaction date, the buyer's member state, the description and value of goods, the VAT rate applied, and the VAT amount collected. Monthly VAT returns must be submitted by the last day of the month following the reporting period, so January sales are reported by the end of February.

Failure to file or pay on time can result in the intermediary's registration being suspended and ultimately deregistered, at which point all in-transit shipments become subject to standard customs clearance until a new intermediary is appointed. The EU takes IOSS compliance seriously and has mechanisms to delist intermediaries who fall behind on remittances, so sellers should vet their intermediary's operational track record before signing up.