In the title compound, C(13)H(12)ClNO(3)S, the dihedral angle between the two aromatic rings is 73.94 (9)°. An intra-molecular C-H⋯O hydrogen bond occurs. In the crystal, inter-molecular N-H⋯O hydrogen bonds connect the mol-ecules to centrosymmetric dimers, forming an R(2) (2)(8) ring motif. The packing is consolidated by C-H⋯O hydrogen bonds and weak π-π inter-actions [centroid-centroid distances = 3.81 (3) and 3.81 (3) Å].