This document defines the minimum requirements for an energy performance contracting (EPC). The energy performance improvement actions (EPIAs) are meant to achieve a guaranteed level of energy efficiency improvement and other agreed energy performance related criteria irrespective of the quantity, use, or types of energy consumed. This document is intended to be applied to EPIA(s) on existing assets. The requirements are set in order to provide: " transparency throughout the whole process that will result in the Energy Performance Contract, " cost effectiveness in relation to the benefits generated by the energy efficiency measure, " a quality assurance, risk mitigation and risk allocation toolkit, " material information necessary for financial and technical calculations for both beneficiary and energy service provider. The document is applicable to energy service providers and beneficiaries regardless of their type, size, complexity or geographical location. This document may be used by financial institutions and other stakeholders of the process. NOTE This document can be used in conjunction with Eurostat and International Accounting Standards Board (IASB) guidance