Active Day Patient Treatment (ADAPT) is a well-established 3 week intensive cognitive-behavioural, interdisciplinary pain management program for patients with disabling chronic pain. The aim of this analysis was to conduct an economic analysis of patient-related effects of ADAPT using hospital administrative data, specifically, to compare the costs and health outcomes for patients 1 month after participating in the program, with the preprogram period when they were receiving standard care. This retrospective cohort study included 230 patients who completed ADAPT (including follow-ups) between 2014 and 17 at the Pain Management and Research Centre at the Royal North Shore Hospital in Sydney, Australia. Data on pain-related healthcare utilization and costs before and after the program were assessed. Primary outcome measures were labour force participation for patients’ average weekly earnings and cost per clinically meaningful change in Pain Self-efficacy Questionnaire, Brief Pain Inventory (BPI) Severity, and BPI interference scores (n = 224). We estimated patients, on average, earned $59 more each week at 1 month follow-up compared with baseline. The cost per clinically meaningful change in pain severity and interference score based on the BPI severity and BPI interference were AU$9452.32 (95% CI: $7031.76-$12,930.40) and AU$3446.62 (95% CI: $2851.67-$4126.46), respectively. The cost per point improvement and per clinically meaningful change in the Pain Self-efficacy Questionnaire were $483 (95% CI: $411.289-$568.606) and $3381.02, respectively. Our analysis showed a better health outcome, reduced healthcare services’ cost, and reduced number of medications taken 1 month after participating in ADAPT.