The Pd–Si–C system was critically assessed by means of the CALPHAD technique. The solution phases (liquid, face-centered cubic, graphite and diamond) were modeled with the Redlich–Kister equation. The compounds Pd 21 Si 4 , αPd 2 Si and βPd 2 Si, which have a homogeneity range, were treated as the formulae (Pd, Si) 21 Si 4 , α(Pd, Si) 2 Si and β(Pd, Si) 2 Si by a 2-sublattice model with Pd and Si on the first sublattice, Si on the second one, respectively. The intermetallic compounds, Pd 5 Si, Pd 3 Si, Pd 9 Si 2 , Pd 14 Si 3 , PdSi, Pd 39 Si 20 , Pd 19 Si 10 , Pd 15 Si 4 in the Pd–Si system and SiC in the Si–C system were treated as stoichiometric compounds. A set of self-consistent thermodynamic parameters of the Pd–Si–C system was obtained.