In the centrosymmetric title complex, [Ni(C(7)H(3)FNO(3)S)(2)(H(2)O)(4)], the Ni(II) atom exhibits a slightly distorted trans-NiN(2)O(4) octa-hedral coordination. The nitro-gen donors are provided by two 5-fluoro-saccharinate ligands and the oxygen donors are provided by four water mol-ecules. The crystal structure features O-H⋯O and bifurcated O-H⋯(F,O) hydrogen bonds, the latter involving the F atom of the 5-fluoro-saccharinate ligand.