While anecdotal evidence suggests that performance-based contracts (PBCs) may foster innovation in buyer-supplier relationships, the understanding of the underlying mechanisms is limited to date. The purpose of this paper is to draw on transaction cost economics and agency theory to develop a theoretical model that explains how PBCs may lead to innovation. Using data on 106 inter-organizational relationships from the Dutch maintenance industry, the authors investigate how the two main features of PBCs – low-term specificity and performance-based rewards – affect incremental and radical innovation. The authors find that term specificity has an inverse-U-shaped effect on incremental innovation and a non-significant negative effect on radica...