In the title compound, C(14)H(14)ClN(3)OS, the 4,6-dimethyl-pyrimidine ring and the chloro-benzene ring subtend a dihedral angle of 80.0 (2)°. The length of the Csp(2)-S bond is significantly shorter than that of the Csp(3)-S bond. The crystal structure is stabilized by inter-molecular N-H⋯O, C-H⋯O and C-H⋯N hydrogen bonding, and C-H⋯π inter-actions.