This paper discusses the issue of perceptions and their influence on economic processes focusing on corruption perception. The higher the perceived corruption in an organization is, the more probable it is that a person dealing with that organization would offer a bribe, thus supporting corruption. Since corruption perceptions are rarely based on actual experience, they might describe reality inadequately. In this case the sources of corruption perceptions might facilitate or diminish the actual corruption level. This paper provides an empirical analysis of the association between corruption perception and the willingness to give bribes as well as the influence of different sources of corruption on corruption perception in Ukraine.