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From January 2026, e-invoicing through Peppol will become mandatory for businesses across Belgium. This regulation is designed to streamline invoicing processes, to lower administrative costs related to paper invoices and to improve transparency in international trade. While the advantages are evident, the road to compliance is far from straightforward for many organisations.
The main difficulty lies in existing ERP systems. Most of these solutions were developed long before e-invoicing regulations became relevant, which means they are not by default equipped to handle the requirements of Peppol. To comply, organisations need to ensure that their systems can generate and process invoices in the UBL standard, while also guaranteeing a secure and reliable connection to a certified Peppol Access Point. Beyond these technical aspects, companies must align their internal processes with new compliance obligations, which often proves to be a complex and time-consuming task.
The challenges are even greater within the energy sector, where invoicing processes are among the most complex. Companies must deal with different invoice types, highly variable consumption data and a dense set of regulatory requirements. For this reason, the transition to Peppol and UBL standardisation cannot be approached as a purely technical exercise. It requires a deep understanding of sector-specific processes and of how business and regulatory dimensions intersect in practice.
This is precisely where TAG can add value. By combining in-depth ERP knowledge with functional and technical analysis and our many years of sector experience, we help companies bridge the gap between regulatory requirements and business operations. In practice, this means assessing the readiness of existing systems and identifying compliance gaps, before moving on to translating invoices into fully Peppol-compliant formats. We make sure that the correct invoice blocks are included, that they are properly converted into UBL and that the entire process passes validation checks so invoices can be delivered without errors. At the same time, we design fallback scenarios that guarantee business continuity. If a delivery fails, automated reporting and follow-up flows ensure that the issue is detected immediately and resolved without disrupting financial operations. In addition, we translate complex regulations into practical processes, for example by clarifying VAT obligations and determining which customers are subject to mandatory e-invoicing and which are exempt.
Through this approach, which combines technical expertise with regulatory insight and sector-specific knowledge, we help energy companies turn compliance into opportunity. The result is a smoother invoicing process, stronger interoperability with partners and an organisation that is fully prepared for the 2026 e-invoicing landscape.
The 2026 deadline is approaching quickly, and preparing early will make the transition smoother and less disruptive. If you would like to understand how ready your organisation is for Peppol, or if you want to explore how compliance can be turned into a real business advantage, our team is here to help. Get in touch with us to discuss your specific situation and take the first step towards a future-proof invoicing process.
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