Policies for steering energy efficiency projects have multiple implications. Among others: economic opportunity, decrease of greenhouse gas emissions, security of supply, technological development. One of the key new instruments foreseen to support energy efficiency improvements is the energy efficiency certificate (EEC). Focusing on the industrial business case, the objective of this study is twofold. First, the paper analyses and discuss the energy performance contract, second it shows how EECs concur in supporting the investment. Specifically, results suggest that thanks to this instrument the payback time would be around 20% below the baseline hypothesis