Nowadays tax frauds are frequently met within corporate environment. The higher effort of individuals might be considered as a stimulus for a rising number of such frauds. This paper examines the particular relation between the difficulties the individuals face in the process of accomplishment of their duties as being employees and their willingness to evade on paying taxes. The seminar paper takes therefore into account recent studies based on real-effort experiments in order to generate a solid argumentation of a possible relation between the exerted level of effort and tax evasion The results of the studies, which were investigated, confirm the existence of a relation between the two elements mentioned before. More precisely, the paper reveals consequently that individuals who perform high effort tasks are more prone to accept the risks regarding tax evasion and generally the employees are usually adjusting their effort in terms of tax fluctuations.