A great number of researches are aimed at solving such issues as the theory of financial reporting, usefulness of information for investors, optimization of the information field of reporting. These problems are particularly acute due to the need for reporting information on the ESG behavior of business in the context of the socio-economic development paradigm. In this regard, the purpose of the work is to define the role of the concept of social responsibility in the development of accounting methodology and the development of an innovative approach to financial reporting. This study is conducted on the basis of general scientific and special methods: systematic approach, comparison, induction, analysis and synthesis, modeling. As a result of the study: it is substantiated that the identification of ownership relations within the ESG-behavior contributes to the recognition of its effect as an element of financial reporting; it is argued that the effect of ESG-behavior on the perimeter of financial reporting informativeness; the evaluation of the concept of social responsibility in the development of financial reporting theory is given. The study concludes that it is necessary to develop an eclectic approach to financial reporting, combining economic and social approaches, with elements of the legal approach, which predetermines the improvement of accounting methodology. The study has scientific significance for the improvement of accounting methodology and practical importance for determining the prospects for the development of the accounting system in the Republic of Moldova in the context of the transition to the socio-economic reporting paradigm.