E-invoicing in Belgium is coming: Tips for a smooth start
The transition to electronic invoicing via Peppol is well underway. The numbers show that we are on the right track, but they also reveal that many businesses are still postponing their actual start. This can lead to practical problems in the near future. It’s time to look ahead and take action.
Current status: Many registrations, Little usage
In the last week of December 2025, over 800,000 Peppol IDs were registered, out of a total of 1.2 million VAT numbers. This is an encouraging signal, as more and more businesses are taking the step towards Peppol, and the number of registrations continues to accelerate.
However, there is a clear gap between registration and actual use. During the same period, only about 3 million Peppol invoices were sent per month. According to estimates from the Federal Public Service BOSA, this number should rise to 40 million invoices per month. This gap indicates that many companies are registered but have not yet actively implemented Peppol invoicing.
What if you’re not ready yet?
For businesses that are not fully operational in time, the government allows a tolerance period of up to three months under certain conditions. While this provides some breathing room, it is not a long-term solution. Companies that fail to meet e-invoicing obligations after this period risk sanctions, such as fines or other administrative measures. More information on the consequences of not being ready in time can be found in this blog.
Because many companies postpone their start until the last moment, we expect practical start-up issues at the beginning of 2026. Think of incorrect data, incompatible systems, or invoicing delays. Proper preparation is therefore essential.
How to get started smoothly with Peppol: Tips & Tricks
To avoid problems and ensure a smooth Peppol launch, these practical tips will help you get on track:
1. Start small and test gradually
Begin today with a limited number of customers or suppliers to test the Peppol process. This allows you to identify and resolve any teething problems before rolling out Peppol widely within your organization.
2. Check your master data
Ensure that all information in your ERP or invoicing system is correct and up-to-date, including:
Company numbers
Peppol IDs (such as KBO or GLN numbers)
Email addresses (for example, for reminders)
Correct contact persons
Accurate data forms the foundation of smooth electronic invoicing.
3. Communicate proactively with your network
Inform your customers and suppliers in a timely manner. A simple email is enough to indicate whether you are already ready with Peppol or when you will be. This helps avoid surprises and misunderstandings.
4. Set clear agreements on Peppol IDs
Invoices are not always sent based on the company number. Sometimes a GLN number or another Peppol ID is used. Make it clear which Peppol ID should be used and when. More explanation on the different types of Peppol IDs can be found in our blog.
5. Monitor your invoicing and Cash Flow
Especially during the start-up phase, keep a close eye on your invoicing. This prevents payment delays and ensures that your cash flow and operational continuity are not jeopardized.
Conclusion
Peppol is no longer a story of the future, it is a reality every business must face. Those who test, communicate, and optimize now will avoid stress and problems later. By starting today, you will truly be ready tomorrow.
