The austerity policies implemented in Portugal because of the bailout agreement between the Portuguese Government and the Troika include measures to increase performance and reduce costs. An analysis of local government efficiency and an assessment of its determinants is highly relevant for policy purposes, particularly when new efforts to decentralize are being discussed. The aim of this research is to evaluate the efficiency of the 278 mainland municipalities in Portugal using a two-stage procedure, combining data envelopment analysis in the first phase with fractional response models in the second. The analysis is performed for 2010 and 2015, before and after the Troika’s intervention in Portugal. Results show a similar pattern for both years, in the two stages. The results also indicate that there is no structural changes from 2010 to 2015, suggesting that the reforms implemented in municipalities did not succeed.