This paper presents a summarized picture of the Brazilian Social Insurance System, both in terms of the system that cover workers in private sector - Regime Geral de Previdência Social (RGPS) (General Regime for Social Security) - and in terms of the various systems that cover public servants hired under the civil service unified regime - Regime Jurídico Único (RJU) (Pension Regime for Government Workers). After a brief analysis of its historical evolution, a diagnosis of the current situation will be presented. Finally, the various reforms are evaluated in terms of their economic impact for the 2000-2030 time horizon. The conclusion is that, despite substantial deficit reductions, further reforms are crucial to restore equilibrium.