With carbon prices expected to rise, the World Wildlife Fund estimates that, by 2030, the EU Emissions Trading Scheme could deliver revenues of €200 bn to EU Member States. The Regulatory Assistance Project sees potential for this new source of substantial funds to help deliver a just energy transition, including by prioritising energy efficiency of the worst quality homes to lift EU citizens out of energy poverty. Programmes in the Czech Republic, France and Germany validate that such an approach delivers additional benefits.