Evaluation and economics each have distinct approaches to valuing. These approaches are traditionally separated by disciplinary boundaries. However, they can and should be combined. Value for money (VFM), in particular, is a shared domain of the two disciplines, because it is an evaluative question about the economic problem of resource use. A theoretical and practical model for combining valuing approaches has been developed through doctoral research. This article presents and reflects on an example – an international development programme where VFM has been assessed using mixed methods (qualitative, quantitative and economic). Under this approach, evaluative reasoning provides the means for integrating economic values with other criteria and evidence. Deliberation with stakeholders strengthens the valuing process, enhancing validity, credibility and use.