The main goal of this paper is to analyse the institutions in the area of electricity generated from renewable energy sources, with detailed focus on feed-in tariffs. Firstly policy introduction and literature overview is described. Regarding methodology, presented research is based on a standard economic methods, consisting of the methods of comparative analysis, deduction and synthesis. Based on the results, we can say that the institutional environment for all renewable energy sources in the Czech Republic is not similar, moreover it is not similar even for the same energy sources. Furthermore, the development of feed-in tariffs does not represent suitable environment for the support of electricity generated from renewable energy sources, since the predictability of the development of feed-in tariffs for new electricity power plant is very hard - the policy of economic support differs in particular years