EU VAT Registration 2025: When You Must Register and How the OSS System Works

VAT is the tax that most consistently catches small businesses and freelancers off-guard when they start selling into European markets. The rules are genuinely complex and they changed significantly with the EU VAT reform that came into effect in July 2021. Understanding when you need to register, which system you use, and what filing obligations follow is not optional knowledge for anyone selling goods or services to European customers.

This guide covers the core scenarios: selling services to EU businesses, selling services or digital products to EU consumers, selling physical goods to EU customers, and what businesses established outside the EU (including UK businesses post-Brexit) need to do. It focuses on the practical steps and the common mistakes rather than exhaustive legal detail.

The fundamental VAT principle: tax where the customer is

EU VAT works on the destination principle. VAT is charged at the rate of the country where the customer is located and paid to that country's tax authority. For a business selling identical products to customers in Germany, France, and Italy, this theoretically means dealing with three different VAT rates and three different tax authorities. The entire OSS and IOSS system was created to manage this administrative complexity.

The nature of the customer matters enormously. B2B transactions (selling to VAT-registered businesses in other EU countries) and B2C transactions (selling to individuals or non-VAT-registered customers) are treated differently. This distinction drives most of the complexity in EU VAT compliance.

B2B sales: the reverse charge mechanism

When you sell services to a VAT-registered business in another EU country, the reverse charge mechanism typically applies. Under reverse charge, you do not charge VAT on your invoice. Instead, your business customer in their own country accounts for VAT on the purchase. They report it on their own VAT return as both output and input VAT, which in most cases nets to zero and costs them nothing.

From your perspective as the seller, you issue an invoice with zero VAT and include a note on the invoice stating that reverse charge applies. You do not need to register for VAT in your customer's country. You do need to verify that your customer has a valid EU VAT number, which you can check through the European Commission's VIES (VAT Information Exchange System) database at ec.europa.eu/vies. Charging VAT on a transaction where reverse charge should apply, or failing to check the customer's VAT registration, creates compliance problems.

Physical goods sold between EU businesses also use the intra-community supply mechanism, which is an extension of the reverse charge principle to goods. The seller applies zero-rated VAT on the invoice and the buyer accounts for acquisition VAT in their country. EC sales lists are required to report these transactions.

B2C sales: the EU-wide threshold and OSS

The situation changes significantly when selling to consumers (non-VAT-registered individuals) in other EU countries. Since July 2021, there is a single EU-wide distance selling threshold of €10,000 per year for B2C sales across all EU countries combined. Once your total B2C sales to EU customers in countries other than your own country exceed €10,000 in a calendar year, you must charge VAT at the rate of each customer's country.

The One Stop Shop (OSS) is the system that makes cross-border B2C sales administratively manageable. Instead of registering for VAT separately in every EU country where you have customers, you register for OSS in your home EU country and submit a single quarterly return covering all your EU sales. The tax authority in your home country distributes the VAT to the relevant member states. OSS is optional but almost always the right choice for businesses that have crossed the €10,000 threshold.

Digital services and the MOSS/OSS history

Digital services (software, online courses, streaming content, app downloads, and similar electronic services) have been subject to destination-based VAT for EU consumers since 2015. Previously, there was a Mini One Stop Shop (MOSS) specifically for digital services. This was absorbed into the broader OSS system in 2021.

If you sell digital products to EU consumers, you are required to charge VAT at the customer's country rate from the first euro of sales, with no de minimis threshold for digital services. This rule applies regardless of where your business is established. A sole trader in Australia selling online courses to French consumers is required to charge French VAT. The OSS or IOSS systems allow this to be reported through a single registration rather than requiring separate registrations in each EU country.

Import One Stop Shop for goods under €150

For businesses selling physical goods to EU consumers where the goods are shipped from outside the EU and the value is below €150 per consignment, the Import One Stop Shop (IOSS) system allows simplified VAT collection at the point of sale. When you use IOSS, you register in one EU member state, collect VAT from the customer at checkout based on the destination country's rate, and file a monthly IOSS return. Goods correctly declared under IOSS are released at EU customs without a further VAT charge.

Without IOSS, VAT on low-value imports is collected at the border by customs, which typically involves the recipient paying an unexpected charge at delivery, a poor customer experience that often leads to disputes and returns. For businesses with significant e-commerce sales to EU consumers, IOSS is close to mandatory if you want to avoid systemic friction in your fulfillment process.

UK businesses selling to EU customers post-Brexit

UK businesses are no longer part of the EU VAT system but still have obligations when selling to EU customers. For B2B sales with the reverse charge, the process from the seller's side is largely unchanged: you issue invoices without VAT and your EU customer accounts for it. Your invoices should reference that the supply is outside the scope of EU VAT for services, or is an export for goods.

For B2C sales from the UK to EU consumers, UK businesses cannot use the EU OSS system directly since the UK is no longer an EU member. Options include registering for VAT in one EU member state (which gives access to the EU OSS from that registration), using a fiscal representative in an EU country, or using platforms and marketplaces that have their own VAT compliance arrangements for cross-border EU sales. For digital services, many UK-based platforms use Ireland or another EU country as their EU VAT registration base.

Country-specific VAT registration thresholds for domestic activity

The €10,000 EU threshold applies to cross-border B2C sales. Each EU country also has its own domestic VAT registration threshold, which applies to businesses established in that country selling to customers in the same country. These domestic thresholds vary considerably. Germany's threshold is €22,000. France's is €85,800 for goods and €34,400 for services. The Netherlands has a similar structure. Some EU countries have very low or zero domestic thresholds, meaning businesses must register for VAT from their first sale.

The domestic small business exemptions in Germany and the Netherlands are particularly useful for freelancers and small service businesses that operate locally. Under Germany's Kleinunternehmerregelung, businesses below the threshold do not charge VAT on their invoices and do not file VAT returns, which significantly reduces administrative burden. The trade-off is that you also cannot reclaim VAT on business purchases, so the scheme is most beneficial for service businesses with low input costs.