EU VAT OSS Guide 2026 for E-Commerce Sellers
VATAi TeamEU VAT One Stop Shop (OSS): A Practical 2026 Guide for E-Commerce Sellers
Selling across multiple EU countries does not always mean filing a separate VAT return in every destination market. For eligible B2C sales, the EU VAT One Stop Shop (OSS) lets e-commerce sellers declare and pay VAT through a single Member State while applying the VAT rate of the customer’s country.
However, OSS only covers specified transactions. Inventory storage, imports, domestic sales and B2B transactions can still trigger local VAT obligations. This guide explains how Union OSS, Non-Union OSS and IOSS work, which sales each scheme covers and when local VAT registration may still be required in 2026.
Last updated: 23 July 2026 • Approximately 10 minutes to read
OSS in one sentence
The EU VAT One Stop Shop is an optional electronic system that allows businesses to report and pay VAT on specified cross-border B2C sales through one EU Member State instead of registering for those sales in every customer country.
What Is the EU VAT One Stop Shop?
The VAT One Stop Shop—usually shortened to OSS—was introduced as part of the EU's e-commerce VAT reforms on 1 July 2021. It is designed for specified business-to-consumer transactions where the VAT is due in an EU country other than the seller's usual country of VAT reporting.
Without OSS, an online seller making cross-border B2C sales could need VAT registrations and returns in several EU destination countries. When the sales qualify, OSS allows the seller to submit one special return through its Member State of identification. That country then distributes the declared VAT to the Member States where the customers are located.
Important: OSS is a reporting simplification, not a separate tax and not a universal replacement for domestic VAT registrations.
Source: European Commission figures published in July 2025.
How Does OSS Work?
For a typical eligible sale, the seller identifies where the customer is located, charges the VAT rate applicable in that country, records the transaction correctly and includes it in the relevant OSS return.
The seller pays the total VAT due to the tax authority in the Member State of identification. That authority is responsible for transmitting the relevant amounts to the Member States of consumption.
Union OSS, Non-Union OSS and IOSS Compared
There is no single scheme that covers every e-commerce transaction. The correct option depends on where the business is established, what it sells and where the goods are located when the sale begins.
Union OSS
Mainly used for intra-EU distance sales of goods and certain cross-border B2C services. It can also cover specified domestic sales made by deemed-supplier marketplaces.
Non-Union OSS
Used by businesses with no EU establishment to report eligible B2C services supplied to consumers in the EU.
IOSS
Used for qualifying distance sales of goods imported into the EU in consignments with an intrinsic value not exceeding €150.
A quick way to identify the likely starting point
This is a simplified screening guide. Establishments, stock locations, marketplace involvement, supply chains and product type can change the result.
How Does the €10,000 EU-Wide Threshold Work?
The EU replaced the former country-by-country distance-selling thresholds with a single €10,000 EU-wide threshold. This threshold can apply to intra-EU distance sales of goods and certain telecommunications, broadcasting and electronic services.
The threshold only applies when the supplier is established in one EU Member State and the combined value of covered supplies does not exceed €10,000, excluding VAT, in both the current and preceding calendar year. It does not apply to non-EU sellers, distance sales of imported goods or B2C services other than telecommunications, broadcasting and electronically supplied services.
When the threshold is exceeded, VAT is generally due in the customer’s country from the sale that takes the total above the limit. A business may also opt to apply destination-country taxation before exceeding the threshold; that choice is generally binding for two calendar years.
OSS Returns, Payments and Record Keeping
Registration is only the beginning. Sellers need reliable transaction data, VAT-rate logic and filing controls to remain compliant.
Return frequency
Union OSS and Non-Union OSS returns are filed quarterly. IOSS returns are filed monthly.
Filing deadline
The return and payment are generally due by the end of the month following the relevant tax period.
VAT calculation
Sales must be separated by Member State of consumption and by the applicable standard or reduced VAT rate.
Records
OSS records must be retained electronically for 10 years from the end of the year in which the transaction occurred.
Typical records include the Member State of consumption, type and date of supply, taxable amount, VAT rate, VAT payable, payment information and evidence used to determine the customer's location. These records must be available electronically to the relevant tax authority on request.
Input VAT is not deducted through the OSS return. VAT incurred on business expenses in a Member State of consumption generally has to be recovered through the applicable VAT refund procedure or a domestic VAT return where the seller is registered.
Does OSS Replace Local VAT Registration?
Not always. OSS can reduce destination-country registrations for eligible cross-border B2C sales, but many operational models still create domestic VAT obligations.
OSS may simplify
- Eligible intra-EU distance sales to consumers
- Eligible cross-border B2C services
- Qualifying imported distance sales under IOSS
Local VAT may still be required
- Holding inventory in an EU country
- Importing goods in your own name
- Moving your own stock between EU countries
- Making domestic sales not covered by a special scheme
- Making B2B transactions or other out-of-scope supplies
For example, an Amazon seller using fulfilment centres in Germany and Poland may still need domestic VAT registrations in both countries because inventory is stored and moved there—even if eligible distance sales to consumers in other Member States are reported through Union OSS.
Three Simplified OSS Examples
These examples are illustrative. The contractual seller, marketplace role, establishment, dispatch point and supply chain must be checked before selecting a scheme.
Common OSS Mistakes E-Commerce Sellers Should Avoid
Domestic sales, B2B sales and stock movements may need different reporting.
Once destination taxation applies, the customer's country and product VAT rate matter.
Warehousing stock can create local registration and filing obligations.
IOSS is specifically for qualifying imported consignments not exceeding €150.
Marketplace, payment and logistics data should be checked throughout the period.
Customer-location data must support the VAT treatment applied.
OSS Readiness Checklist
Frequently Asked Questions About EU VAT OSS
Is OSS mandatory?
No. OSS is an optional simplification. If a business does not use it, the business may need to register and report VAT directly in each relevant Member State of consumption.
Can a non-EU business register for OSS?
Yes. Depending on its transactions, a non-EU business may use Non-Union OSS, Union OSS for qualifying intra-EU distance sales of goods, and/or IOSS. The registration route and intermediary requirements depend on the scheme.
Can a business use more than one scheme?
Yes. The schemes cover different supplies. For example, an EU-established business may use Union OSS and IOSS, while a non-EU business could potentially use all three schemes if its activities meet the conditions.
Do I need a VAT number before registering for Union OSS?
Yes. Union OSS uses the valid domestic VAT identification number allocated by the Member State of identification. A seller without one must obtain it before registering for Union OSS.
What happens if I store products in several EU countries?
Storing goods usually creates local VAT obligations in the stock country. Union OSS may still be used for eligible cross-border B2C sales, but it does not remove every registration or domestic filing obligation linked to inventory.
Does IOSS apply to every imported order below €150?
No. The sale must meet the IOSS conditions, and goods subject to excise duty are excluded. The €150 limit applies to the intrinsic value of each consignment.
How often are OSS and IOSS returns filed?
Union OSS and Non-Union OSS returns are quarterly. IOSS returns are monthly. The filing and payment deadline is generally the end of the month following the reporting period.
Not Sure Which OSS Scheme Applies?
VATAi supports e-commerce businesses with VAT registration, filings and ongoing compliance across key European markets. Our team can help assess your sales flows, inventory locations and reporting requirements.