Facilitated by the global digitalization efforts and the proliferation of innovative technologies in the past decade, the cost of energy management solutions has decreased and they became widely available on the market. As Energy Performance Contracts (EPC) allows customers implementing energy efficiency measures to repay the project costs through the savings they achieve, a key aspect is to provide an instrument for a transparent and secure measurement and verification (M&V) of the benefit generated, both in terms of energy savings and cost. In this regard, FinSESCo provides a toolchain of innovative applications to generate and control the project data, manage investors, collect IoT data from the implementation premise and assess the savings achieved through the project. In this regard, the paper presents a M&V tool implemented within the FinSESCo toolchain for measuring the benefits achieved as a result of EPC implementation.