Deciding what value to offer to customers is a key managerial task in differentiating a service in the market and in satisfying customer needs better than competitors. This task is more critical for B2B services because customer satisfaction results from both the customer’s actual experience with the service and the ongoing interactions a customer has with the service provider. Previous research supports this view by showing that a service’s performance and relational value offerings are paramount in driving customer satisfaction; however, the distinct effect of each of these value offerings on customer satisfaction has not been fully explained. Using a multi-informant design and data from 173 B2B service firms, our study provides a deeper understanding of how the outcomes of performance and relational value vary at different levels of customer participation and supplier collaboration in a B2B service project. This deeper understanding helps managers to identify precisely the conditions under which a specific configuration of performance and relational value offerings is more or less influential with respect to customer satisfaction.