Green Gas Levy (GGL): rates, underlying variables, mutualisation threshold for the 2023-2024 financial year
Updated 20 December 2024
Applies to England, Scotland and Wales
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This publication is available at https://www.gov.uk/government/publications/green-gas-levy-ggl-rates-and-exemptions/green-gas-levy-ggl-rates-underlying-variables-mutualisation-threshold-for-the-2023-2024-financial-year
BEIS has a regulatory duty under Regulation 39(2) of the Green Gas Support Scheme Regulations 2021 to publish the Green Gas Levy (GGL) rate for each scheme year (beginning 1 April) by 31 December of the preceding year.
GGL levy rates
The GGL levy rate for the 2023-2024 scheme year (1 April 2023 to 31 March 2024):
- 0.122p per meter per day, equivalent to 45p per meter over the period
Underlying variables
In line with the regulations, the 2023-2024 levy rate has been calculated based on the following variables:
| Variable | 2023-2024 |
|---|---|
| A – Adjustment factor | 1.00653 |
| SB – Projected scheme expenditure * | £37,832,570 |
| SD – Forecast scheme year end surplus | £46,822,210 |
| AA – Ofgem’s total forecasted administration costs | £3,080,000 |
| TY – True-up from scheme year before last | £0 |
| TD – Year end deficit from scheme year before last | £0 |
| QL – Quarterly lag uplift | £15,887,211 |
| H - Headroom | £1,256,645 |
| I – Interest accrued on levy funds held in Ofgem bank account | £0 |
| Ofgem’s estimated administration costs for carrying out a mutualisation process** | £12,500 |
*This corresponds to the GGSS Overall Scheme Expenditure Budget, published on the GGSS: Budget Management page.
**Note that Ofgem’s administration costs for carrying out the mutualisation process is the same value as the mutualisation threshold.
Mutualisation threshold
The mutualisation threshold is any levy shortfall above £12,500.