In the title compound, C(9)H(9)N(3)O(3)S, the benzene ring and the N-carbamothio-ylacetamide unit are oriented at a dihedral angle of 54.82 (4)°. The dihedral angle between the ring and its attached nitro group is 28.54 (12)°. An intra-molecular, bifurcated N-H⋯(O,O) hydrogen bond generates two S(6) rings. In the crystal, inversion dimers linked by pairs of N-H⋯S hydrogen bonds generate R(2) (2)(8) loops. Weak C-H⋯O inter-actions link the dimers.