Length of hospital stay is a quality metric in joint arthroplasty. Rapid recovery protocols have safely reduced the average length of hospitalization, but it is unclear whether there is a difference in complication and readmission rates between patients discharged the day of surgery or on postoperative day 1 (POD 1). We calculated 30-day complication and readmission after total knee arthroplasty (TKA), total hip arthroplasty (THA), and unicompartmental knee arthroplasty (UKA) based on day of discharge