Green Gas Support Scheme: budget management

Update: 10 December 2025

New regulations are expected to come into effect in early 2026 to extend the commissioning deadline of the Green Gas Support Scheme (GGSS) from 31 March 2028 to 31 March 2030. While this extension will be subject to the standard parliamentary scrutiny, the aim is to provide new applicants with an additional two years to commission plants, begin injecting biomethane into the gas grid and make their stage 3 application for GGSS registration. The proposed extension aims to maximise deployment and the associated carbon savings that can be achieved through the scheme. 

The deadline for submitting new stage 1 applications will remain 31 March 2028. Under the current regulations the standard tariff lifetime is 15 years but if participants commission beyond 31 March 2028, their tariff length will not be extended and will end by 31 March 2043. For example, if an applicant has a commissioning date of 31 March 2030 (the final date possible under the extension), they would receive a tariff lifetime of 13 years.

Applicants who applied before 10 December 2025 will need to retain their original commissioning date. If this is not achievable, they may choose to withdraw and submit a new application. Please note that re-entry will be subject to the scheme’s eligibility criteria and conditions at the time of reapplication and is not guaranteed.

Applicants who submit stage 1 applications on or after 10 December 2025, but before the proposed regulations come into effect, must apply with a commissioning date no later than 31 March 2028. If the commissioning deadline becomes unachievable for an applicant in this category after the proposed regulations come into force, the date may be revised to a later date (no later than 31 March 2030) without the applicant needing to withdraw or reapply, provided they meet the necessary requirements under the regulations.