The reform of Spain’s regional financing system finds itself once again on the agenda of the central government, albeit three years behind schedule. The debate is a recurrent one and far from straightforward, given that all reforms have their winners and losers, at least, relatively speaking.The outcome of the latest negotiations will usher in the sixth regional financing model since the process of decentralization was set in motion; though in a dynamic and changing world, it is both normal and desirable that the financing system be revised with a certain frequency.