Introduction The work-to-retirement transition involves a process of psychologically and behaviourally distancing oneself from the workforce that is often accompanied by other social changes. The person is confronted with new social roles, expectations, challenges and opportunities that can influence lifestyle and well-being. In the scientific literature, we find recent reports of interventions aimed at improving health and well-being in people at retirement age. However, there is still a gap of knowledge on how different interventions during retirement might improve health status. We intend to conduct a scoping review with the aim of describing interventions for improving well-being across the retirement transition. Methods and analysis The methodological framework described by Arksey and O'Malley; the Joanna Briggs Institute guidelines as well as the Preferred Reporting Items for scoping reviews and Preferred Reporting Items for Systematic Reviews and Meta-analysis Protocols statements will be followed. Eligibility criteria comprise of: (a) all type of original studies, review articles or reports published on journals as well as grey literature; (b) describing interventions to improve the well-being in adults across their retirement transition; (c) including participants before, during and after retirement; (d) all publications must describe variables associated with participants' physical and/or psychological and/or social well-being and/or perceived quality of life related to these; (e) no language restriction and (f) published from January 2000 to March 2019. The main findings will be summarised using a narrative descriptive synthesis approach and grouped following the population, concept and context principles. A stakeholder meeting will be held to provide feedback on the findings and to develop next steps in research and practice. Ethics and dissemination Approval from a research ethics committee is not required, as no personal information will be collected. We plan to disseminate our research findings at different levels: scientific community, clinical and social arenas, as well as to healthcare leaders and policymakers and general population. The project has been registered at Open Science Framework with the name TRANSITS: work to retirement transition project.