In the title compound, [Fe(H(2)O)(6)][FeBr(3)(CO)(3)](2), both Fe atoms have an octa-hedral coordination and the bromide carbonyl complex has a fac-stereochemistry. The [Fe(H(2)O)(6)](2+) octa-hedron has point symmetry and is slightly compressed along one O-Fe-O axis. The [FeBr(3)(CO)(3)](-) anion has point symmetry 1 and mean bond lengths of Fe-Br = 2.455 (5) Å and Fe-C = 1.809 (2) Å. The cation and anion complexes are mutually linked via O-H⋯Br hydrogen bonds with O⋯Br distances of 3.340 (3) to 3.388 (3) Å.