The study was conducted under the order of the Lithuanian Association of Heat suppliers aiming to examine the differences in heat prices of Lithuanian district heating (DH) companies by assessing the influence of state policy, decisions of municipalities and activities of heat suppliers and impact on the final prices. During the investigation, heat supply companies were evaluated according to different economic and technological indicators, thus identifying the problematic district heating companies. Solutions for optimizing the cost of heat production, operation and transmission were provided in the study.