OBJECTIVE Consultation-liaison psychiatry (CLP) researchers have not yet developed accepted quality indicators to measure efficiency or effectiveness. The purpose of this paper is to combine objective and subjective quality indicators to assess hospital-based CLP service utilisation, efficiency and effectiveness. METHODS Service utilisation rate was calculated over the service's first four years. Patient characteristics and objective quality indicators relating to response timeliness in 2012 were examined. Totally, 41 staff and 52 consecutive patients completed evaluation surveys to subjectively evaluate effectiveness. RESULTS The utilisation rate increased initially and then slightly declined to 1.03 per cent of all hospital admissions. In 2012, 91.5 per cent were seen on the same referral day and 99.4 per cent by the next day. The benchmark for urgent referrals was not met (77.4 per cent). Patients rated involvement with the CLP service a positive experience (90 per cent), but were less clear about follow-up plans (68 per cent). Staff believed that the service improved the patients' hospital course (98 per cent) and was communicated well (93-95 per cent). Only 63 per cent agreed that relevant CLP education was provided and 76 per cent rated follow-up plans as clear. CONCLUSIONS This CLP service was evaluated by measuring utilisation rates, referral response timeliness and consumer feedback. Referral to contact time is a useful objective quality indicator but should be combined with subjective yet standardised measures surveying service recipients (patients and referring staff) to be comprehensive and meaningful.