UBL Invoice Viewer Blog

What is a UBL/XML invoice?

From January 2026, all VAT-registered companies in Belgium will be required to use electronic invoicing. This means invoices must be issued and received in a standardized format called UBL/XML. But what does that actually mean in practice? And how can you deal with these files that are often hard to read?

How to easily read a UBL/XML invoice ?

Understanding a format that’s not as readable as it looks…

Why e-invoicing will become mandatory: what self-employed professionals need to know for 2025–2026

E-invoicing is no longer a futuristic idea: it is rapidly becoming a reality for European businesses, especially for freelancers and small companies. By 2025–2026, several countries (including Belgium) will require the issuance and receipt of structured electronic invoices, most commonly in the UBL/XML format.

But why this major shift? And more importantly: what does it mean for a self-employed professional who wants to keep working efficiently without completely changing their daily habits?

This article provides a clear and practical overview.