Knowledge from academic design research projects does not always help design professionals to actually strengthen their work. Based on a multi-case study, this paper describes how researchers view the impact of their design research projects on design practice and what they do to achieve this. Even in projects where impact on design practice is a stated ambition, several challenges can stand in the way, such as a lack of funding opportunities and unclarity on the needs of design practice. The paper provides tips for researchers and funding parties who want to inform design practice by research, including tips to operationalize design practice roles.