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Department for Energy Security and Net Zero gov.uk

Notice: Green Gas Support Scheme (GGSS): open to applications

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Regulations to extend the commissioning deadline of the Green Gas Support Scheme (GGSS) from 31 March 2028 to 31 March 2030 came into force on 16th October 2026.

This extension provides eligible 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 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 remains 31 March 2028. The maximum tariff lifetime remains 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 will receive a tariff lifetime of 13 years.

The Green Gas Support Scheme (GGSS) provides tariff support for plants producing biomethane via anaerobic digestion which is injected into the gas grid. Tariffs are calculated to compensate plants for the building of new infrastructure to produce biomethane and ongoing operation costs.

It is funded by the Green Gas Levy which is applied to all licenced fossil fuel gas suppliers.

The scheme follows the Non-Domestic Renewable Heat Incentive (RHI) Scheme which closed to new applicants on 31 March 2021.

The GGSS launched on 30 November 2021. It is open to applications until 31 March 2028. The commissioning deadline for eligible applicants is 31 March 2030.

Registered participants will receive tariff payments for up to 15 years.

Two separate budget caps have been set for the scheme:

  • the Applications Budget Cap (AB): a cap against which applications to the scheme are checked to ensure that there is available budget based on their estimated production and resulting spend
  • the Overall Scheme Expenditure Budget Cap (OSEB): set above the AB, this cap is used to set the Green Gas Levy.

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    Department for Energy Security and Net Zero — imported from official source
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    https://www.gov.uk/government/organisations/department-for-energy-security-and-net-zero.atom ATOM
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    October 16, 2026 09:30
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    https://www.gov.uk/government/publications/green-gas-support-scheme-ggss#2026-10-16T09:...

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