The prices for electricity and heat have risen sharply recently. This puts pressure on low-income households in particular, as they have less financial leeway to deal with the high prices. In many cases, the obvious savings options have already been exhausted. At the same time, worthwhile investments in energy-efficient household appliances, such as a new refrigerator, usually cannot be made without additional financial support. However, support programmes to increase energy efficiency in low-income households should not only focus on purely financial support, but combine the offer with targeted behavioural incentives to achieve the greatest possible success. This is the result of a recent ZEW policy brief by ZEW Mannheim and Heidelberg University, which is based on an empirical analysis of the “Energy-Saving Check”, a joint initiative of the German Caritas Association and the Bundesverband der Energie- und Klimaschutzagenturen.