Over the last few years, corporate social responsibility is frequently discussed, as well as the way in which it affects the welfare of the community in which company operates. Corporate social responsibility (CSR) represents daily business activities which have multiple beneficial effects on the various stakeholders, and it consists of three basic categories: environmental, social and economic (triple bottom line). In the Republic of Croatia, reporting on corporate social responsibility is voluntary, as well as the reporting on any other non-financial activities, and every company decides for itself whether to report on corporate social responsibility, how often and to which extent. However, on January 1st 2017., EU Directive 2014/95 comes into force by which non-financial reporting becomes mandatory for all Member States of the European Union. The main objective of this Master thesis was to explore the way in which Croatian companies report on corporate social responsibility, and for that purpose 79 reports from 2014. were analyzed. Reports are available on the official websites of the observed companies. The analysis has revealed the indicators that appear in the reports and their use, depending on the industry sector and the type of report, was analyzed. Global Reporting Initiative provides companies with the instructions on how to present non-financial data to the public, and the GRI Guidelines are one of the most commonly used frameworks for non-financial reporting in the world. Precisely for this reason the use of the GRI Guidelines in the reports of Croatian companies was analyzed. The results of the conducted analysis provide a detailed insight into the practices of Croatian companies when it comes to reporting on socially responsible aspect of the business.