The FRS-FRNS (Fonds de la recherche scientifique) constitutes a major source of funding for fundamental research, with an annual average of €12m for research contracts, and €27m in research remits awarded to the ULB.

FNRS support is awarded based on scientific excellence alone, and comes in various forms: permanent or temporary research positions, funding for teams, funding for large pieces of equipment, scientific exchange credits, prizes, etc.