This text explains how the Decentralized Management Index (IGD) – the main instrument for Bolsa Família interfederative coordination – works. The IGD is an indicator of the quality of decentralized management of Bolsa Família and the Unified Registry. Based on it, the federal government transfers funds to states and municipalities. The higher the IGD, the greater will also be the value of the funds transferred. The document presents the creation of the IGD, its strategic importance, how the funds can be spent, etc.