Successful collaboration between professionals working in multisectoral services for people with disabilities requires access to data on the client’s work ability. This study examines work ability data needs, availability, and acquisition in social and health care services and employment services and explores possible differences between these service sectors. A cross-sectional survey was carried out using a self-developed questionnaire based on Choo’s information management process model, the Work Ability House model and previous research on work ability data. The questionnaire was targeted at physicians, nurses, physiotherapists, psychologists, and experts who support the work ability of people with disabilities and who work in primary health care, specialised health care, social services or employment services. The findings indicate that data on clients’ self-perceived health status is more frequently available than data on self-perceived work ability. This variability in data availability exists across professional sectors, highlighting the need for enhanced data management practices related to work ability assessment and support among professionals in social and health care services and employment services. The study underscores the importance of increasing professionals’ willingness to discuss work ability issues with working-age clients, particularly in primary health care and social services. These findings are pertinent in terms of enhancing multisectoral collaboration among professionals who need to comprehensively assess and support the work ability and employment of people with disabilities. Also, the study provides a diverse list of individual pieces of data related to work ability.