In the mol-ecular structure of the title compound, C(9)H(11)NO(3)S, the N-H and C=O bonds are anti to each other, while the amide H atom is syn with respect to the ortho-methyl group in the benzene ring. The C-S-N-C torsion angle is -58.2 (2)°, indicating a twist in the mol-ecule. In the crystal, N-H⋯O hydrogen bonds link the mol-ecules into chains along the c axis.