The Finnish Evaluation of Social Services group (FinSoc) aims to enhance knowledge of social work evaluation methodology and promote evidence-based social work in Finland. FinSoc gathers information on effective social work evaluation measures and models. It also develops new evaluation methods and supports social services evaluation research. However, further development is still needed, such as national evaluation instruments, higher education in evaluation, and integrated research and practice structures. Social work evaluation poses challenges due to its complexity and need to consider multiple contexts and perspectives.