In the title compound, C9H10BrClN2S, the di-methyl-thio-urea group is twisted from the benzene ring plane by 54.38 (6)°. In the crystal, the amino groups are involved in the formation of N-H⋯S hydrogen bonds, which link the mol-ecules into chains along [010]. Weak C-H⋯Cl inter-actions further link these chains into layers parallel to the ab plane.