Faced with potentially failing to meet its 2020 national target for renewable energy sources (RES) despite considerable progress, Poland is implementing a new renewable energy law. At the Vienna Forum on European Energy Law, Dr. Jan Rączka provided an overview of the law, which enters into force in April 2015. He explores the motivations behind the legislation and the implications that these changes are likely to have on the development of renewable energy sources in Poland. The Polish regulator intends to implement RES auctions as an instrument to reduce the costs of supporting renewables, eliminate overcompensation for some technologies, develop a more balanced portfolio of RES, and achieve congruence with EU state aid rules.