Sustainable development is increasing in importance with restrictions on emission and carbon footprint. Similarly, both energy and resources efficiency is required, together with cost-efficiency. The current paper focuses on carbon footprint, energy usage, and material use efficiency of semisolid metal casting. A detailed analysis is made on the RheoMetal process, which is benchmarked against conventional HPDC casting. The analysis includes the gating system and the importance of the use of primary or secondary material. It furthermore includes a discussion of process yield and benefits based on process capability.