Any development in flame-retardant polymers should essentially meet sustainability and circularity requirements. Bearing in mind net-zero horizon drawn for 2050, selection of flame retardants (FRs) for polymers takes a deep root in circularity policies. This chapter discusses the convergence of FR selection, and the principles of circular economy (CE) in an academic context, emphasizing life-cycle assessment (LCA) concept. It summarizes and outlines the critical matter of fire safety within various industries, such as textiles and electronics by delving into the latest advancements in bioresource FRs. The chapter highlights the environmental concerns and the toxicity associated with the conventional FRs, reminding the need for emerging halogen-free alternatives among sustainable and renewable resources. The essential role of LCA in providing a global perspective on the environmental impacts of FRs throughout their life-cycle journey is discussed. This analysis involves decision-making processes and the latest sustainable fire safety solutions. Furthermore, strategies falling within the field of CE, such as optimizing FR product design, waste management, and policy frameworks, are reviewed. This chapter also discusses potential prospects, including the widespread adoption of bio-based alternatives, further understanding of the concept of a greener future, and FR recyclability framed by CE.