In November 2021, a Draft Royal Decree was published by the Chancery of the Prime Minister of Belgium, aiming to expand the scope of the existing e-invoicing mandate for certain business to government (B2G) transactions by implementing mandatory e-invoicing for all transactions with public administrations in Belgium. This obligation was already in place for suppliers of the centralised public entities of certain regions (Brussels, Flanders, Wallonia). However, going forward, it will include all public entities in all Belgian regions.
Source Sovos