The title compound, C(14)H(15)BrO(4)S, was prepared by the oxidation of ethyl 2-(5-bromo-3-ethyl-sulfanyl-1-benzofuran-2-yl)acetate with 3-chloro-peroxy-benzoic acid. The crystal structure is stabilized by aromatic π-π inter-actions between the benzene rings of neighbouring mol-ecules [centroid-centroid distance = 3.814 (9) Å], and possibly by weak C-H⋯π inter-actions. In addition, the crystal structure exhibits three inter-molecular C-H⋯O non-classical hydrogen bonds. The ethyl group bonded to carboxyl-ate O atom is disordered over two positions, with refined site-occupancy factors of 0.686 (18) and 0.314 (18).