The present study builds a typology of organizational knowledge in business services and empirically examines the effects of knowledge on innovation performance. It is suggested that firms differ with respect to their knowledge creation approaches and that these approaches have implications for firms‘ innovation activities. A conceptual framework of knowledge assets with degrees of tacitness and collectiveness as the principal axes is used to ground the empirical analysis. The organizational knowledge framework is empirically operationalized using survey data from 167 business service firms and supplementary case study evidence from 16 other firms. It is found that business service improvements and new service introductions are significantly associated with collectively held knowledge, such as codified service solutions or team-based competences and procedures. In contrast, relying solely on tacit knowledge held by individuals may hamper innovation. The results also suggest that tacit collective knowledge is more closely associated with new service introductions, whereas explicit collective knowledge is associated with service improvements. Tacit collective knowledge is thus conducive. A managerial implication is that new service introductions necessitate team competences and routines, whereas incremental service improvements are more likely if procedures are in place to codify services into explicit solutions or technologies. Thus, the knowledge management approach should depend on the strategic orientation of the service firm toward continuous improvement of existing services or development of completely new services.