Brazilian fiscal federalism has sought to optimize efficiency in the allocation of public sector resources through the strengthening of local government. However, the Brazilian federalist system has been complex in terms of the accommodation of revenues and expenses among the federated entities. The process of political and fiscal decentralization, intensified in the country after the 1988 constitution, brought greater autonomy to the municipalities and, on the other hand, greater responsibilities and expenses. In order to deal with this paradox (I do not know if the word paradox is good), new institutional arrangements, combining independence with integration, have been fostered by the role of municipalities in order to foster social development and improve management indicators Supervisor. In this sense, this study seeks to assess whether participation in inter-municipal public consortia improves the fiscal management indicators of municipalities. In Brazil, the Federation of Industries of Rio de Janeiro (Firjan) has been releasing the Firjan Fiscal Management Index (IFGF) since 2007, which takes into account five dimensions: own revenues, personnel expenses, investments, liquidity, and debt costs. Firjan ranks municipalities in four levels of management: difficult, critical, good and excellent. Thus, considering the profile of the mayor, vertical and horizontal coordination of management, generation of employment and income, population and population density, a logit panel ordered for the period 2006 to 2016 was estimated, with a total of 57,371 observations. The results showed that municipal fiscal management is positively influenced by participation in municipal public consortia. Municipalities increase the likelihood of advancing to higher levels of fiscal management by participating in this institutional arrangement. The results were also positive in the decomposition by dimensions, with the exception of the cost of debt.