The application Filing CBSO

The new Filing application for the preparation, validation and filing of annual accounts will be operational from 4 April 2022.

To access the new Filing application, we use CSAM, the government portal. The Filing application provides both the preparation of annual accounts and the filing to the Central Balance Sheet Office of files created via the application or via commercial accounting packages.

Click here to access FILING (CBSO)


Logging in with commercial certificates will remain possible until further notice, and certainly until 24/12/2023. 

The supported Certificate Authorities (CA) can be found here.

Digital keys and terms of use


Filing Quick guide : Guide de démarrage rapide (FR)Snelstartgids (NL)

Filing : Manuel d’utilisation (FR) - Gebruikershandleiding (NL)

Webservices : Documentation technique (FR)Technische documentatie (NL)

General protocol for filing annual accounts or consolidated annual accounts via the Internet (French -  Dutch - German)

Protocol for the annual accounts and consolidated accounts filed via the Internet as a PDF file (FrenchDutch - German)

Protocol for the annual accounts filed via the Internet as a structured data file (XBRL). This document is intended for developers of software used to establish annual accounts which will be filed at the National Bank of Belgium through an electronic data file (available in English only).