IOSS and OSS in 2027: What cross-border e-commerce sellers need to know

What is changing on 1 January 2027?

According to the European Commission, minor legislative clarifications effective 1 January 2027 will impact users of OSS and IOSS. These are part of the Single VAT Registration (SVR) pillar of the ViDA package, adopted in March 2025. The changes include a new correction mechanism for OSS, improved IOSS control tools with additional information required before import, and monthly listings per Member State of consumption.

For sellers, this means you may need to provide more data about your sales before goods are imported, and you will likely see more detailed reporting from tax authorities. These changes aim to reduce fraud and administrative burdens over time, but they require you to adapt your record-keeping and data transfer processes. It is important to note that these are not a complete overhaul; the existing legal framework for OSS and IOSS remains in place, and the 2027 updates are incremental.

The European Commission published revised Explanatory Notes and OSS guidelines on 24 July 2026 to reflect these changes. You should review them to understand exactly how the new requirements will affect your business.

• Read the Revised Explanatory Notes and OSS guidelines published on 24 July 2026.
• Plan for additional IOSS data before import and monthly listings per Member State.
• Understand the new OSS correction mechanism to fix errors efficiently.

How to verify your current situation

Before making any changes, determine whether you actually need to use IOSS or OSS. The One Stop Shop (OSS) covers distance sales of goods within the EU and certain services, while the Import One Stop Shop (IOSS) covers goods imported into the EU from third countries with a value not exceeding 150 euros. If you sell B2C goods cross-border, you likely qualify for one of these schemes, but thresholds and conditions apply.

Start by reviewing your sales channels and volumes. For OSS, you need to check whether your annual distance sales exceed the EU-wide threshold of 10,000 euros (excluding VAT), which triggers the requirement to charge VAT at the destination country's rate. For IOSS, the key is whether you are importing low-value goods into the EU and want to simplify your VAT obligations at the point of sale.

Even with the 2027 changes, the fundamental eligibility criteria have not changed in the documents we reviewed. However, the European Commission emphasizes that you should always refer to the latest official guidance, as implementation details may evolve. If you are unsure about any requirement, seek professional advice from a VAT expert or use the official resources on the Taxation and Customs Union website.

Also, be aware that the ViDA package includes other elements that may affect you later, such as deemed supplier rules for platforms starting 1 July 2028 and Digital Reporting Requirements in 2030. While the 2027 changes are your focus now, it is wise to consider the longer-term roadmap.

• Confirm your distance selling threshold status: below 10,000 euros may remain domestic.
• Check if your goods meet the IOSS value limit of 150 euros.
• Review your sales channels to see if you are already using OSS or IOSS.
• Note that 2027 changes do not alter these core eligibility rules.

Practical steps to prepare for 2027

First, audit your current VAT compliance process. Document which EU member states you sell to and what VAT rates you apply. Ensure that your e-commerce platform or internal system can handle the additional data fields that may become required for IOSS, such as more detailed item information before import.

Second, review your correction procedures. The new OSS correction mechanism is designed to make it easier to correct previously reported returns. Familiarize yourself with this mechanism and ensure your accounting team or service provider knows how to use it correctly. This can help you avoid unnecessary compliance costs.

Third, if you use the IOSS scheme for importing goods, coordinate with your logistics partners. The requirement for 'additional information before import' means you need to transmit data to customs in a timely and accurate manner. Work with your carriers or customs brokers to ensure they are aware of the 2027 changes and can handle the new data requirements.

Finally, set up alerts for any updated guidelines. The European Commission published revised explanatory notes on 24 July 2026 specifically for the 2027 changes-make sure you read them. Also, check the official EU portal regularly or subscribe to updates from the Taxation and Customs Union to stay informed about any further modifications.

• Audit your current reporting data and update systems for IOSS information needs.
• Learn about the new OSS correction mechanism and train your team.
• Coordinate with logistics partners for IOSS import data changes.
• Subscribe to official EU updates for ongoing changes.

What remains unchanged and what to watch for

The core benefits of the OSS and IOSS schemes remain unchanged: you can use a single portal to declare and pay VAT for cross-border sales, avoiding multiple VAT registrations. The 2027 changes are mainly about fine-tuning the system, not about introducing a completely new way of reporting.

However, there are other ViDA measures you need to be aware of for the future. For instance, from 1 July 2028, new deemed supplier rules will apply to platforms facilitating short-term accommodation rental and passenger transport by road. In 2030, Digital Reporting Requirements will affect cross-border B2B transactions, which might have an indirect impact on your operations if you sell B2C.

Also, from 1 January 2025, there is already a special scheme for small businesses that can benefit SMEs selling across borders. This scheme might offer you an alternative to OSS if you qualify. Its interaction with the new rules is something you should explore.

Staying informed is key. The taxation landscape in the EU is evolving, and being proactive can save you time and money. Keep an eye on the official European Commission pages for VAT special schemes and ViDA for the latest updates.

• The single portal advantage of OSS/IOSS continues in 2027.
• Future ViDA measures: platform rules by 2028 and new reporting in 2030.
• Consider the SME scheme available since 2025.
• Always check official sources for updates.

Common pitfalls to avoid

One common mistake is assuming that IOSS automatically applies to all low-value imports. Remember that IOSS is optional and requires a specific registration in one EU member state. Also, if you sell through an online marketplace, the marketplace might be considered the deemed supplier for VAT, meaning you may not need to use IOSS yourself-check your agreements.

Another pitfall is ignoring the difference between OSS and IOSS. OSS is for distance sales of goods already in the EU, while IOSS is for imports from third countries. Using the wrong scheme can lead to compliance errors and penalties. Always verify which scheme applies based on where your goods are located at the time of sale.

Do not forget that the 2027 changes may require you to update your data collection practices. If you do not gather the necessary data now, you might face delays or fines when the new IOSS requirements take effect. Start testing your data flows with your logistics partners well in advance.

Finally, avoid relying on outdated information. The official guidelines were updated in July 2026, and these supersede older documents. If you are getting advice from a third party, ensure they have access to the latest official guidance.

• Do not assume IOSS applies automatically; registration is needed.
• Understand the differences between OSS and IOSS to avoid misuse.
• Start testing data flows early for new IOSS requirements.
• Use the latest official guidelines, not outdated summaries.