Climate change and energy poverty are two sustainability challenges that can be addressed through deep-energy retrofits for homes. This systematic review identifies which factors influence the achievement of energy retrofits for households vulnerable to energy poverty. It covers both energy-poor households and the landlords or building owners of energy-poor households. The results identify a range of influential factors across several themes: financial, policy and organizational, trust and communication, technical, attitudes and values, and health. Health and quality of life are particularly influential motivating factors among households vulnerable to energy poverty, as is the presence of trust and communication between stakeholders. Multiple financial considerations are also important, such as the availability of no-cost retrofit options and the prospect of lower energy and maintenance costs. Lastly, government requirements to retrofit and minimum energy standards are motivating, particularly in the social housing sector. These findings and the lack of focus on energy poverty within the energy retrofit literature and policies point to a need for further research on this topic, and for retrofit policies specifically targeted to households vulnerable to energy poverty. Policy relevance Energy retrofit policies targeting households vulnerable to energy poverty could be more effective if they: Improve access to low or no-cost retrofit options alongside tenant protection mechanisms Include requirements for resident consent and engagement Build capacity to collect, centralize and publicize information about building stocks to align retrofit projects with necessary upgrades Disseminate knowledge of retrofit programs through trusted communicators Increase stakeholders’ understanding of retrofit benefits Take a holistic approach by emphasizing the co-benefits of energy retrofits in energy-poor households Implement government requirements to pursue energy retrofits aligned with overarching government climate policies, particularly for publicly owned housing.