This study is available in both English and Polish and includes an analysis of domestic and international accounting standards applicable to business combinations. It also features a review of literature available on the subject as well as practical information and case studies. In conclusion, the report proposes enhancements to existing legislation to ensure compliance with EU laws and regulations, in particular with Directive 2013/34/EU of the European Parliament and of the Council of 26 June 2013 on the annual financial statements.