The objective of this prospective cohort study was to examine the effectiveness of an outpatient neuropsychological rehabilitation programme for patients with acquired brain injury (ABI) and their relatives. The participants were 26 ABI patients with a mean age of 44.7 (SD 11.7) years and 24 caregivers. Mean time since injury was 3.0 (SD 3.6) years. The intervention consisted of a patient-tailored process-oriented neuropsychological rehabilitation programme focusing on facilitation of the adaptation process. Repeated measurements were taken prior to treatment (T0), directly after treatment (T1) and 6 months later (T2). Primary outcome measures were cognitive failures (CFQ), quality of life (SA-SIP30), and individualised goals (GAS). Patients improved significantly on individualised goals between T0 and T1 (p < .01). This effect retained at T2. There were no significant differences on CFQ and SA-SIP30. The programme had a positive effect on attainment of the patient's individual goals. This was not associated with a higher level of participation or a better quality of life.