Based on the CBA and CBCA methodology of ENTSO-G and ENTSO-E and ACER guidelines REKK has developed a modelling based methodology to monetize the social benefit effects of electricity and gas infrastructure projects. The methodology has been applied for the infrastructure projects that were submitted to the Hungarian energy regulator by the project promoters. Based on the REKK CBA evaluation a cross check of the CBAs and CBCAs submitted by the project promoter was provided.