Introduction Research into the relationship between the subjective perception of clinical change and the objective evidence of the same is very limited. Less is known about the relationship between clinical judgments by mental health experts and the patient's perception of symptom change, in particular across different diagnostic groups. Aims and objectives This study aims to determine the level of concordance between the HONOS as a tool for clinical outcome monitoring and the self-reported change in psychopathology in a total sample of psychiatric patients as well as stratified by their primary diagnosis at admission. Methods A consecutive sample of patients admitted to a Swiss psychiatric hospital for either alcohol use disorders, schizophrenic psychoses, mood disorders, anxiety and somatoform disorders, or personality disorders, was assessed using the Brief Symptom Inventory (BSI) at admission and at discharge. The HoNOS were rated by the responsible clinicians. Complete data of admission and discharge were available from approximately 600 cases. Reliable change index (RCI) will be calculated to determine a clinically meaningful change based on the HoNOS scores. Concordance of RCI and change in BSI scores will be explored and compared between different diagnostic groups. Results and conclusions According to our preliminary results from this ongoing evaluation program, we hope to provide a step towards a deeper understanding of the interrelationship between clinical judgments and the course of subjectively experienced mental health problems. Disclosure of interest The authors have not supplied their declaration of competing interest.