Green Gas Levy (GGL): rates and exemptions

The Green Gas Levy (GGL) applies to licensed fossil fuel gas suppliers in Great Britain from 30 November 2021 and funds the Green Gas Support Scheme (GGSS). This page contains information that regulations require the government to publish, including the levy rate and maximum collection amount, and approved biomethane certification schemes.

Levy rates

We publish the GGL rates here, including the underlying variables and mutualisation threshold, and the levy Maximum Collection Amount, as required by the Green Gas Support Scheme Regulations 2021:

• the per meter levy rate for the 2025-2026 financial year
• the per meter levy rate for the 2024-2025 financial year
• the per meter levy rate for the 2023-2024 financial year
• the maximum collection amount

The levy rate for each financial year is published by 31 December in the preceding year.

Exemptions and approved certification schemes

Exemptions are available to suppliers whose total gas supply for the duration of a scheme year comprises at least 95% certified biomethane. Suppliers seeking this exemption must prove their biomethane supply levels using retired green gas certificates from a scheme on the approved biomethane certification scheme list.

Administration

Ofgem is the scheme administrator. Their website provides further details on the administration of the GGL.

Background

The GGL will be charged to fossil fuel gas suppliers for the duration of the GGSS. It is set to fund the full costs of the scheme, including all payments to participants, administration costs, and to cover overspend and under-collection risks.

The GGSS will help decarbonise our gas supplies by increasing the proportion of green gas in the grid, through support for biomethane injection. This is part of the government’s wider strategy to decarbonise heat in buildings, as set out in the October 2021 Heat and buildings strategy.

Related links

• GGSS: budget management
• Future support for low carbon heat consultation
• Consultation on a Green Gas Levy
• the government response to both consultations, supported by an Impact Assessment, published September 2021