Assessment and support of the work ability and function is an elementary responsibility of health care. The focus of assessment lies in the remaining functional capacity and its sufficiency with respect to occupational demands. Objective and subjective perspectives, personal resources and limitations, and the subject's relationship to the environment are taken into account according to biopsychosocial models of work ability. We recommend three useful self-report measurement tools for work ability and function. Return-to-Work-Readiness Questionnaire (RTW-RQ), Return-to-Work Self-Efficacy (RTW-SE) and Sheehan Disability Scale (SDS). These tools structure an interactive evaluation providing possibilities for follow-up. They provide means to discuss one's personal resources and limitations and to promote return-to-work.