The objective of this paper is to examine cultural differences as the reason for failures of trans-borderinvestment projects in the Polish banking sector. By investment projects we mean all projects with theparticipation of foreign investors, which involved a merger, an acquisition, or the establishment of a new bankbased in Poland and subject to Polish supervision and legal regulations. The analysis included all transactionsof this type which took place in the Polish banking sector in the years 1994-2010. The sample comprised 31projects: 16 mergers and acquisitions and 15 establishments of new banks. The results do not confirm most ofthe earlier findings on the subject, which showed a clear connection between cultural dimensions and risktaking. Unlike most other research, our study showed that cultural factors have no significant influence uponrisk taking in banking by strategic investors in the Polish banking sector. Only the dimension of power distanceproved to explain the reasons for failures. The results can be applied broadly, both as a tool for supporting thedecision making in case of new investment projects, and for evaluation of the existing transactions taking placein the Polish banking sector.