['The purpose of this study was to determine the relationship of frailty and 6-month postoperative costs.', 'Subjects aged ≥ 65 years undergoing elective colorectal operations were enrolled in a prospective observational study. Frailty was assessed by a validated measure of function, cognition, nutrition, comorbidity burden, and geriatric syndromes. Frailty was quantified by summing the number of positive characteristics in each subject.', 'Sixty subjects (mean age, 75 ± 8 years) were studied. Inpatient mortality was 2% (n = 1). Overall, 40% of subjects (n = 24) were considered nonfrail, 22% (n = 13) were prefrail, and 38% (n = 22) were frail. With advancing frailty, hospital costs increased (P < .001) and costs from discharge to 6-months increased (P < .001). Higher degrees of frailty were related to increased rates of discharge institutionalization (P < .001) and 30-day readmission (P = .044).'] Does frailty predict increased hospital and six-month healthcare cost following colorectal surgery in older adults?