ABSTRACTInnovative firms often involve customers in their product development to drive innovation outcomes. However, few have empirically examined how this division of innovative labour affects innovation performance. Drawing on prior studies and the knowledge-based theory of the firm, we theorise conditions under which customer codevelopment benefits innovation performance. By examining panel data from Swiss firms, we provide the first empirical account of the performance effects of customer codevelopment based on a large-scale survey sample. We find that a firm's absorptive capacity reinforces the relationship between customer codevelopment and innovation performance. We elaborate on the implications of these findings for the literatures on customer codevelopment and open innovation.