Fiscal subject related
Technical description
It provides a detailed description of the system's high-level design, key technical elements, and main functionalities, including how the FDM manages and transmits business transactions to FPS Finances. The document is targeted at manufacturers who are interested in producing FDMs for the Belgian market and is intended to guide developers and analysts in implementing the required functionalities. The document is only available in English and is in draft form, subject to updates.
You can access the English version of this technical document on our Fiscal Portal at the following link: API-protocol between FDM & Fincloud
Other news from Belgium
New updates to technical specifications published by FPS Finance for GKS 2.0 cash register systems in Belgium

The Belgian FPS Finance has released updates to the technical specifications for GKS 2.0 cash register systems, with version 1.9 now available. These updates detail the operation and communication between the cash register system and the fiscal data module. Read more
VIDA regulation adopted—what does that mean for business?
The EU adopted the VAT in the Digital Age (ViDA) package on March 11, 2025, introducing major changes to the VAT system starting January 1, 2027. Key reforms include mandatory digital VAT reporting by 2030, new VAT collection rules for online platforms, and expanded One-Stop Shop (OSS) registration to simplify cross-border compliance. Additional measures, such as mandatory e-invoicing, phasing out... Read more
FPS Finance in Belgium updated technical documentation for GKS 2.0 concerning communication with TA as well as communication between CRS and FDM

FPS Finance has released updates to the technical documentation for GKS 2.0, focusing on communication between the Fiscal Data Module (FDM) and the Tax Authority (TA). Version 1.04 of the API protocol between FDM and FINCLOUD includes text improvements and minor corrections in section 12.5, while version 1.8 of the CRS-FDM communication document adds clarifications on B2B invoicing and VAT receipt printing. Read more
Slovenia: EU Targets Unsafe E-Commerce Imports with New Measures
The European Commission is tightening regulations on e-commerce imports to address the surge of unsafe and counterfeit goods, particularly from China, by reforming customs rules and increasing product safety checks. Key measures include removing the duty exemption for low-value parcels, introducing a potential customs fee, establishing priority control areas, and launching an EU-wide product safet... Read more
Is the usage of certified cash register systems expanding to other sectors in Belgium?

Belgium's federal government plans to expand the use of certified cash register systems (black boxes) beyond the HORECA sector to other fraud-sensitive industries, though specific sectors have yet to be confirmed. Small-scale businesses with annual revenues below €25,000 will remain exempt, but the calculation method for this threshold may be revised. Read more
The FPS Finance has published a new POS Certification Guide for GKS 2.0 solutions in Belgium.

The FPS Finance in Belgium has published a new POS Certification Guide for GKS 2.0 solutions, providing detailed instructions on the certification process. The guide includes an application form, testing procedures, required documentation, and step-by-step guidance to ensure compliance. Read more
FPS Finance in Belgium releases updates to technical documentation—Use Cases for GKS 2.0.

Belgian Tax Authority – The FPS Finance has published updates to the technical documentation for new GKS 2.0 solutions. The update concerns Use Cases for new cash register systems 2.0, specifically UseCases BasicSet POS_FDM, which include how various transactions are handled. Read more