Abstract. The lack of a good understanding of customer needs within eservice initiatives caused severe financial losses in the Norwegian energy sector, resulting in the failure of e-service initiatives offering packages of independent services. One of the causes was a poor elicitation and understanding of the e-services at hand. In this paper, we propose an ontologically founded approach (1) to describe customer needs, and the necessary e-services that satisfy such needs, and (2) to bundle elementary e-services into needs-satisfying e-service bundles. The ontology as well as the associated reasoning mechanisms are codified in RDFS to enable software support for need elicitation and service bundling. A case study from the Norwegian energy sector is used to demonstrate how we put our theory into practice.