The aim of this thesis is to analyse the EUs State aid policy framework in regard to renewable energy support schemes; further the application of such in Austria and the United Kingdom. The impact of the general State aid prohibition and the ‚Guidelines on State aid for environmental protection and energy will be assessed therein. In thhe Guidelines the Commission defines State aid schemes that are considered compatible with the internal market due to the contribution towards the EUs climate change goals. The Commission intends to integrate renewable energy sources into competitive markets and increased European integration in the mid-term future. At the end, the support schemes in Austria and the UK will be assessed and compared. Whereas the UK was an early-adoptor of market-based instruments for energy, Austria tended to be reluctant in recent years. It remains to be seen how these instruments change given the EUs pressure through State aid guidelines, and if the UK could proof to be an example for other Member States.