Assessing business models’ sustainability impacts has become necessary to help firms transition towards a more sustainable and circular economy. Most firms face multiple challenges in developing sustainable business models. Many of these challenges can be solved by assessing the sustainability impacts of various business model designs. Various sustainability assessment tools and processes have been developed, each fitting different organizational needs in the sustainable business model innovation process. This paper seeks to develop a deeper understanding of this organizational process by analyzing the extant sustainability assessment frameworks and tools for business models and synthesizing the findings into a set of design principles (as meta-artifacts). We draw on a systematic literature review using a qualitative meta-synthesis approach. The proposed design principles can serve as guidelines in helping a company integrate sustainability assessment into its business model innovation process. The paper concludes by presenting a research agenda for future work in this area.