The acquisition of electricity in the Free Contracting Environment - FCE - is a consolidated alternative of cost reduction, since it allows the previous contracting of the energy to be consumed at a freely negotiated price among market players. The objective of this study was to demonstrate, through a case study, how the acquisition of electric energy in the FCE can help reduce organizational costs and generate significant economic results. Methodologically, it was an explanatory research, with quanti-qualitative approach, whose instruments of data collection were the bibliographical research and documentary analysis coming from a case study. The analysis of the data occurred through electronic spreadsheets, graphics, and, finally, content and comparative analysis. The results demonstrate the cost reduction, of the R5,000,000.00(fivemillion“reais”),alowerpaybackinlessthantwomonths,andalsoanInternalRateofReturn−IRR−of365 5.000,000,00 (cinco milhões de reais), payback inferior a dois meses e uma Taxa Interna de Retorno – TIR de 365%
