Given the weak internal revenue mobilisation capacity of Local Governments in many developing countries, this paper explores the role of Faith-Based Organisations (FBOs) in filling resource gaps of the Keta Municipal Assembly (KeMA) in Ghana. We make a case for the establishment of mechanisms for FBOs to increase their investment in the provision of basic services. The study employed both qualitative and quantitative designs using the case study approach focusing on FBOs and KeMA. Interview guides were used for 12 key informants sampled purposively while questionnaires were administered to 60 FBO leaders and five officers at the Assembly. The FBO leaders were randomly selected from the 26 communities across the Municipality. The findings reveal that the FBOs have the capacity and willingness to fill the Assembly’s resource gaps. However, KeMA had not collaborated effectively with the FBOs to adequately harness the resources of FBOs. The study recommends that KeMA should work more closely with FBOs in order to leverage their resources to implement development projects.