The aim of this study was to demonstrate the diversity of formation of the costs of electricity, heat and transport fuels. Using the data available in the literature and own research has shown that at the present stage of development, only energy from waste biomass is able to compete with conventional energy. Past trends suggest that in the future, thanks to technological progress RES can be competitively priced compared to conventional sources. Until then require financial support to new technologies can be applied on a scale sufficient to ensure their profitability.