Green Gas Support Scheme guidance
This guidance is for biomethane producers wishing to apply to the scheme, tariff guarantee holders, and scheme participants. This is also relevant for associated industries and organisations, consumer groups and the public sector.
This guidance covers:
- eligibility and how to apply to the scheme
- how tariff rates are determined
- participant obligations once registered,
- and how to submit periodic data and receive payments.
- It also sets out the scheme’s audit regime and compliance processes, along with other aspects of Ofgem’s administration.
Ofgem's administration of the associated Green Gas Levy (GGL) is outlined in the Green Gas Levy Guidance.
Version 3.0 of the Green Gas Support Scheme Guidance is the current guidance that reflects the latest regulation amendments which became law on 16 October 2026.
The changes to the scheme include:
- details of the extension to the scheme commissioning window, enabling a stage 3 application to be made until March 2030.
- changing when sustainability audits are required, moving from registration anniversary dates to scheme years.
See the subsidiary document, 'Updates to GGSS guidance v3.0', for a summary of proposed changes made.
Main document
Subsidiary documents
All updates
Version 3.0 with a summary of updates published on 16 October 2026 with details of scheme changes.
Draft version 3.0 with a summary of updates published on 28 September 2026 with details of upcoming scheme changes.