Objective: To compare cost and perioperative outcomes of robotic, videoassisted thoracoscopic surgery (VATS), and open surgical approaches to pulmonary lobectomy.Methods: Patients who underwent pulmonary lobectomy between 2012 and 2017 at a single tertiary referral center were reviewed. Propensity score adjustment by inverse probability of treatment weighting (IPTW) was used to balance baseline patient characteristics. The primary outcomes of the study were direct hospital cost and perioperative outcomes, including operative time, complications rates, and length of stay. Indirect cost and charges were secondary financial outcomes.From the