GGSS budget caps, production factors, and inflation forecasts for 2025-2026
Updated 20 December 2024
Applies to England, Scotland and Wales
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This page covers the聽Green Gas Support Scheme (GGSS)聽budget caps and their supporting information effective for the 2025-2026 financial year (1 April 2025 to 31 March 2026).
The Department for Energy Security and Net Zero (DESNZ)聽is required to publish this information under the Green Gas Support Scheme Regulations (reg. 4(13)).
罢丑别听GGSS聽has 2 budget caps, which are shown in Table 1: the Application Budget (AB), which limits estimated spend by acting as a cap against which all applications to the scheme are checked, and the Overall Scheme Expenditure Budget (OSEB), which sits above the聽AB, and is used to set the Green Gas Levy rate.
This page also contains the production factors (Table 2) and inflation forecast (Table 3) used to set the budget caps for the 2025-2026 financial year, which are used in the assessment of applicants바카라 사이트� estimated annual payments against available budget when they apply for a tariff guarantee.
Further information on聽GGSS聽budget caps and the production factors and inflation forecasts used to set them is published on the聽GGSS聽Budget Management Guidance page.
Budget caps
Table 1:聽GGSS聽budget caps (set 20 December 2024, effective from 1 April 2025)
| Year | 2025/26 | 2026/27 | 2027/28 | 2028/29 | 2029/30 |
|---|---|---|---|---|---|
| AB听(拢惭) | 80.3 | 124.9 | 174.2 | 203.8 | 214.3 |
| OSEB听(拢惭) | 86.3 | 143.6 | 200.3 | 203.8 | 214.3 |
Production factors
Production factors are used to estimate the proportion of a plant바카라 사이트檚 total registered capacity that we expect to be used to produce eligible biomethane in any given quarter of a plant바카라 사이트檚 time on the scheme.
Table 2: Production factors used to estimate聽AB聽commitments from 1 April 2025
| Quarter following registration | Production factor |
|---|---|
| Q1 | 47% |
| Q2 | 60% |
| Q3 | 63% |
| Q4 | 68% |
| Q5 | 69% |
| Q6 | 71% |
| Q7 | 71% |
| Q8 | 74% |
| Q9 | 74% |
| Q10 | 76% |
| Q11 | 78% |
| Q12 | 79% |
| Q13 | 79% |
| Q14 | 78% |
| Q15 | 79% |
| Q16 | 80% |
| Q17 | 83% |
| Q18 | 83% |
| Q19 | 84% |
| Q20+ | 85% |
Inflation forecast
Ofgem is responsible for uprating聽GGSS聽tariffs annually on 1 April, using the actual聽CPI聽rate from the previous December. This covers inflation for that calendar year and is published by聽ONS聽each January. Forecasts from the바카라 사이트� are used바카라 사이트痶o set budget caps. The OBR forecasts are used as they are available at the time of budget setting, and are the forecasts closest to the figure that Ofgem will use 바카라 사이트� the forecast rate for Q4 for each calendar year is the closest to the December rate.
Table 3: Inflation forecast used to estimate聽AB聽commitments from 1 April 2025
| Financial year | 2025/26 | 2026/27 | 2027/28 | 2028/29 | 2029/30 |
|---|---|---|---|---|---|
| Estimate of聽CPI听颈苍蹿濒补迟颈辞苍 | 2.4% | 2.5% | 2.1% | 2.1% | 2.1% |