Diploma thesis Analysis of cross border mergers in Czech Republic and Hungary consists of two parts theoretical and practical one. The first part briefly describes general terms that are necessary for better understatement in terms of mergers and acquisitions. The first half of the theoretical part focuses on key steps and regulations (law, accounting and taxes) that need to be fulfilled to make a cross border merger in Czech Republic. In the second half, the same steps are being analyzed, but from the Hungarian point of view. The last part, the practical one, shows the accomplished cross border mergers in Hungary from years 2013 to 2017. The main goal of the thesis is to explore the legal, accounting and tax aspects of cross border mergers in Czech Republic and in Hungary.