The Sustainable Aviation Fuel (SAF) Mandate secures demand for SAF by:
obligating the supply of an increasing amount of SAF in the overall UK aviation fuel mix, and incentivising SAF supply through the award of tradeable certificates with a cash value.
The SAF Mandate starts in 2025 at 2% of total UK jet fuel demand, increasing linearly to 10% in 2030 and then to 22% in 2040.

From 2040, the obligation will remain at 22% of total UK jet fuel demand until there is greater certainty regarding SAF supply.

According to government estimates, the SAF Mandate could deliver up to 6.3 megatonnes of carbon savings per year by 2040.