Multimolecular excited states of Pt(II) complexes have been discussed in multiple detailed theoretical and experimental studies published over the years. The excited state of such aggregated states involves the dz2 orbitals of metal centres in the HOMO with the LUMO being mostly distributed over the cyclometallating ligands, which gives rise to metal-metal-toligand charge-transfer (MMLCT) triplet states. Although it is vital for the molecules to align in a way to allow a close contact between the metal centres, the attraction between the two molecules appears not to be exclusively related to the metalophillic property of Pt(II) ions. This work demonstrates a very simple approach to predicting excited state properties in aggregates of platinum(II) complexes using DFT/TDDFT methods and provides a tool for predicting the key features of their luminescence spectra. The luminescence of these aggregates is rationalised with SOC-TDDFT, demonstrating there to be no significant differences in the radiative decay rates between monomeric and dimeric complexes. Excimer/dimer formation is very common among platinum(II) complexes, but very few works contain sufficient quality photophysics data suitable for the purpose of this work. These carefully chosen complexes are shown in the Fig. . They present a selection of complexes with a differently coordinated central ion, including mono-and dinuclear examples, with a wide range of energy of the bimolecular excited state. Term 'bimolecular excited state' will be used for the purpose of this work as there is essentially no distinction in the computational model of excited state dimer and excimer.