This paper presents the results of the study "Research of approaches to the consolidated interregional tariff formations implemented as part of the common state pricing policy in electricity industry”. The authors study the regional differentiation of electricity grid tariffs in Russia and reveal the principles of the consolidated interregional tariff formation. According to the results of the research, the electricity price differentiation factors occurring at the different pricing levels have been revealed. For non-household customers, the main factor of electricity price differentiation is the electricity network transmission tariff differentiation, which accounts for a high percentage of the electricity price structure. The regional differentiation between max and min electricity network tariffs could be as high as 400 to 800%. Practical recommendations for abandoning the electricity price differentiation as part of the implementation of the consolidated interregional tariff formation have been established.