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The Ultimate Guide to Belcotax

The Ultimate Guide to Belcotax and How Ordolio Can Simplify Your Association Administration.

Welcome to this in-depth blog post about Belcotax, an essential tool for Belgian associations, and how our latest integration with Ordolio can simplify the management of your tax obligations. Belcotax is a crucial link in the administrative chain for associations that need to provide tax certificates. In this article, we delve deep into what Belcotax is, how it works, and most importantly, how Ordolio represents a revolutionary step forward in this regard.

What is Belgotax?

Belcotax is an online platform developed by the Belgian Federal Public Service Finance for electronically submitting tax certificates. Since 2022, it has become mandatory for Belgian associations to submit these certificates themselves online through Belcotax-on-web. This system significantly simplifies the procedure but also brings new challenges, especially for associations without extensive IT support.

The Challenge of Tax Returns

The process requires associations to upload an XML file containing detailed information about all members who participated in paid activities eligible for tax certificates. This file must have a specific structure and be filled out correctly, which can be quite a task.

Belgotax on Web via Ordolio

How Ordolio helps !

At Ordolio, we understand the complexity of this process and have developed a seamless solution that integrates with Belcotax. Our tool automatically generates the necessary XML file for your association, based on the activities and member data you provide. This not only saves you time but also significantly reduces the risk of errors.

Belgotax on Web via Ordolio

Generating an XML file: A Look Under the Hood

When you ask us to generate an XML file, we thoroughly examine all relevant paid activities and gather information about the participating members. To qualify, a member must be registered and under 14 years old on the day(s) of the activity. In addition, the member’s and parent’s national identification numbers are required, as Ordolio utilizes this detail to generate accurate certificates.

Certifying Authority and Belcotax Number

Another important aspect of the declaration is setting up your certifying authority and Belcotax number. We will guide you through this process, from identifying your certifying authority to applying for a Belcotax number if you don’t already have one.

XML to BOW: the last step

After generating the XML file, it is necessary to convert it to a BOW file for the final submission to Belcotax. We provide guidance for this step, although your organization is responsible for submitting the declaration.

External Sources and Best Practices

Managing tax certificates is a complex process that requires knowledge of both tax legislation and technological tools. For organizations looking to delve deeper into the specifications of Belcotax or seeking best practices, we recommend consulting the official website of the Belgian Federal Public Service Finance and relevant tax manuals. These resources provide valuable insights and updates on tax obligations.


Belcotax is a vital component in the administration of Belgian associations. With Ordolio’s Belcotax integration, the process of submitting tax certificates becomes significantly streamlined, allowing you to focus more on what truly matters: supporting the goals and enabling learning within your association.

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Start IT @KBC

Great news

Ordolio is pleased to announce that we have been selected for the prestigious Start it Accelerate | @KBC programma!

Start IT @KBC

And it doesn't end...

We have been selected for the Microsoft for Startups Founders Hub program!

This incredible opportunity will allow us to accelerate our mission to help clubs and youth movements streamline their administrative tasks while respecting the privacy of their members.