Despite its relative simplicity, the empirical model achieves a high 97 % accuracy within the dataset. Out of the 2,032 complexes considered, only 60 exhibit discrepancies in their ground state spin assignments with respect to the computations. Most of the disagreements occur for square pyramidal complexes featuring Fe(III), Co(II), and Ni(II) with relative metal radii close to the cut-off values. Our empirical model is indeed unable to assign the IS state to square pyramidal Fe complexes, which would require an additional cut-off value.