This graduate thesis deals with the topic of corporate social responsibility (CSR), which represents a modern business trend where companies, in addition to making a profit, take responsibility for the impact on the environment. The paper defines CSR, traces its development since the 1960s and analyzes its levels, dimensions, models, strategies and standards, and explores the benefits that CSR brings to companies, as well as the challenges in its implementation. A special focus of the paper is the analysis of CSR on the example of Hrvatske elektroprivreda (HEP), where corporate management, financial results and the way in which HEP takes care of their employees, the community and the environment are presented. Research was also conducted through a CSR survey on companies operating in Croatia. The aim of the paper is to research CSR as an important business concept and analyze its application on the example of HEP, with the addition of the perspective of other Croatian companies. The methods of description, induction, deduction, analysis and synthesis, and surveying were used. The paper ends with an analysis of research results and a conclusion.