The title compound, [PdCl(C(14)H(23)N(5))]Cl·0.25H(2)O, is a pseudopolymorph of the previously reported compound [PdCl(C(14)H(23)N(5))]Cl·2H(2)O [de Mendoza et al. (2006 ▶). Acta Cryst. E62, m2934-m2936]. The cationic complex and chloride anion are disordered over two positions each in a 0.584 (4):0.416 (4) ratio. The geometry about the Pd atom is distorted square-planar. The pyrazole rings are almost perpendicular, forming a dihedral angle of 86.6 (6)° to each other, to mitigate steric conflict between their methyl groups.