Skip to main content
Notice

Green Gas Support Scheme: budget management

Details of the budget management mechanisms of the Green Gas Support Scheme.

Updates to this page

From:
Department for Energy Security and Net Zero
Published:
26 July 2021
Last updated:
2 November 2026
Show all updates

  1. Green Gas Support Scheme: budget management guidance updated to reflect deadline extension made on October 16

  2. Added GGSS budget caps years and inflation forecast estimates to 2034/35.

  3. Published GGSS budget caps, production factors, and inflation forecasts for 2026-2027.

  4. New regulations are expected to come into effect in early 2026 to extend the commissioning window of the Green Gas Support Scheme (GGSS) to 31 March 2030. Subject to parliamentary scrutiny, applicants have an additional two-years to commission plants and begin injecting biomethane into the gas grid.

  5. We will not publish a Call for Evidence for the 2025 Annual Tariff Review (ATR). The Review will be informed by the 2025 Biomethane Cost Survey, plus wider market intelligence and evidence gathered through regular stakeholder engagement.

  6. Added GGSS budget caps, production factors, and inflation forecasts for 2025-2026.

  7. The degression thresholds in the Budget Management guidance have been amended to reflect the new GGSS closure date of 31 March 2028.

  8. New regulations on the Green Gas Support Scheme which come into effect today (4 June) extend the scheme to 31 March 2028 (previously 30 November 2025).

  9. We have published new GGSS budget caps, production factors and inflation forecast effective from 1 April 2024, and made updates to the GGSS budget management guidance.

  10. We have published new GGSS budget caps, production factors and inflation forecast effective from 1 April 2023, and made updates to the GGSS budget management guidance. 

  11. Budget caps (Table 4) and inflation forecasts (Table 3) have been extended to cover scheme financial years 2026/2027 and 2027/2028, following a regulatory amendment (Statutory Instrument 2022 No.592) which took effect on 1 July 2020.

  12. We have improved the explanation of GGSS budget management mechanisms, and added links to the new Green Gas Support Scheme (GGSS): expenditure forecast statements and tariff change notices page (https://www.gov.uk/government/publications/green-gas-support-scheme-ggss-expenditure-forecast-statements-and-tariff-change-notices).

  13. Inflation estimate for financial year 2025 / 2026 added to table 3.

  14. Updated alongside launch of GGSS.

  15. First published.

Applies to England, Scotland and Wales

Documents

Green Gas Support Scheme: budget management guidance

HTML

GGSS budget caps, production factors, and inflation forecasts for 2026-2027

HTML

GGSS budget caps, production factors, and inflation forecasts for 2025-2026

HTML

GGSS budget caps, production factors, and inflation forecasts for 2024-2025

HTML

GGSS budget caps, production factors, and inflation forecasts for 2023-2024

HTML

Details

The Green Gas Support Scheme (GGSS) has several mechanisms to manage budgets and ensure value for money, while maintaining investor confidence to encourage deployment. These were set out in the March 2021 government response to our consultation.

Regulations came into effect on 4 June 2024 to extend the GGSS to 31 March 2028 (previously 30 November 2025).

These documents provide more detail for applicants and investors on:

  • the budget caps
  • the degression process
  • the Annual Tariff Review
  • the Green Gas Levy

See also details of the Green Gas Levy (GGL), which will fund the GGSS.

Sign up for emails or print this page