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Green Gas
Support Scheme (GGSS)
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We help businesses make the most of the Green Gas Support Scheme (GGSS)
Launched in November 2021, the GGSS takes decarbonisation to the next level by incentivising new anaerobic digestion (AD) plants to inject biomethane directly into the UK’s gas grid. This tackles one of the toughest barriers to our legally binding net zero target: heating buildings sustainably. The scheme closes to new applicants on 31 March 2028, so if you're thinking of applying it's important not to delay.
We can support you with the application process onto the scheme, and ensure you make the most of the biomethane production incentives available.
The GGSS is a government-backed scheme designed to boost the production of biomethane, and its input into the national gas grid.
GGSS provides financial support through quarterly payments over 15 years, compensating producers for infrastructure costs and ongoing operations. The GGSS is a key step toward reducing the UK's reliance on fossil fuels and produce greener heating for homes and businesses.
Why Choose GGSS?
What the scheme offers
Under the Green Gas Support Scheme large anaerobic digestion plants can recover much of their £10–£15 million capital outlay through 15 years of quarterly tariff payments.
The biomethane they supplied to the gas grid replaces fossil gas, driving nationwide decarbonisation. Operators can also layer GGSS support with Renewable Transport Fuel Obligation (RTFO) accreditation to earn extra transport-fuel credits and boost revenue.
Who can benefit from the GGSS?
Under the Green Gas Support Scheme (GGSS), only new anaerobic digestion plants with a nearby, capacity-ready gas grid connection are eligible.
Ofgem expects 45–90 projects to register between 30 November 2021 and 31 March 2028. Operators can also secure Renewable Transport Fuel Obligation (RTFO) accreditation to boost revenue.
The GGSS application process
1. Submit an initial application through Ofgem’s GGSS portal to receive a Provisional Tariff Guarantee Notice (PTGN).
2. Reach financial close within three weeks and provide funding evidence to convert the PTGN into a binding Tariff Guarantee.
3. Once your plant is commissioned and injecting biomethane, file the full application for Ofgem to release payments.
How does combined heat and power fit in?
The GGSS supports large anaerobic digestion (AD) plants that inject biomethane into the UK gas grid, while smaller AD sites often run combined heat and power (CHP) engines instead. To qualify, a new plant must fit a gas upgrader and grid entry unit, an investment of roughly £1 million to £3 million only biomethane injection attracts the tariff.
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Without NFU Energy we wouldn’t have started receiving our accreditation income nearly as soon as we did.
Mike Forbes, AGM Forbes
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If you would like more information or discuss what's possible for you, fill out the form below or call 024 7669 6512.
Enquire today
Take the first step towards a more sustainable and cost-effective energy future by speaking with our dedicated team today. Our friendly specialists can help with all of your energy needs.
Or call us on +44 (0) 24 7669 6512