This Practice Note provides a detailed overview of the Contracts for Difference (CfD) subsidy regime introduced under the Electricity Market Reform (EMR) to support the deployment of renewable and other low carbon electricity generation. It includes details of CfD support that has been awarded to date, the key entities involved in the CfD regime, the statutory mechanisms for granting CfD support, and the key terms of the standard form contract granted to renewable generators who win CfD support through the competitive allocation mechanism. The Practice Note also explores ancillary subsidies which are connected to the CfD regime, such as the Clean Industry Bonus (CIB) for offshore wind projects.