Several organisations such as think tanks, academic and EU institutions have issued studies and reports relating to the tax system in Belgium.

Agoria
American Chamber of Commerce
European Commission
Febiac
HIVA K.U. Leuven
High Council of Finance
Itinera
OECD
Steunpunt fiscaliteit & begroting K.U. Leuven
- Regionalisering vennootschapsbelasting.
- Regionalisering personenbelasting