In the UK, Argus has launched the world’s first calculated prices for e-SAF (electrolytic sustainable aviation fuel). The modelled production costs will support offtake agreement negotiations and provide new transparency to help the energy industry address environmental requirements. E-SAF as a pioneering technology is more expensive than bio-SAF and conventional jet fuel. The new Argus calculated costs for e-SAF production in November 2025 show it is currently 13 times the cost of conventional jet fuel and 3.5 times the cost of bio-SAF (produced using the HEFA SPK pathway) in northwest Europe.