In this study, the authors investigate the economic feasibility of an energy community investing in renewable energy sources (RES). The estimation is based on the optimisation of the total annual average electricity costs of a typical study case that uses historical load and RES generation data and follows the directives of the Greek recent legislation for energy communities. The operation of a local energy market is compared with other available RES pricing mechanisms, such as self-consumption, feed-in-tariff and net metering.