Green light for green flight: The UK’s new SAF revenue certainty mechanism explained

Aviation’s race to net zero is gaining altitude, powered by Sustainable Aviation Fuel (SAF). Following the 2025 launch of the SAF Mandate, which secures a guaranteed level of demand, the UK is now delivering the final piece of the puzzle - the Revenue Certainty Mechanism (RCM). But how will this new scheme reshape investment, and what does it mean for the future of flight?
 

INTRODUCTION

SAF plays a central role in reducing fossil fuel emissions during flight, and improving its production and usage is a core target for the current Government. Last year saw the introduction of the SAF Mandate, a key policy mechanism which establishes demand by requiring a certain percentage of SAF to be used for any flight. Furthermore, the SAF Bill, which enters the Report Stage on 4 February 2026 and is expected to receive Royal Assent this year, provides the legislative powers to underpin the RCM and gives further clarity to aircraft operators.

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