Boiler Upgrade Scheme 2026 (GB)

The Boiler Upgrade Scheme (BUS) is a government-backed grant programme administered by Ofgem on behalf of the Department for Energy Security and Net Zero (DESNZ). It was introduced to accelerate the replacement of gas and oil boilers with low-carbon heating technologies, primarily heat pumps and biomass boilers. The scheme forms a central pillar of the UK's strategy to decarbonise domestic and small commercial heating ahead of the 2050 net zero target.

The BUS is open to owner-occupiers of homes and small non-domestic properties in England and Wales. Properties must have a valid Energy Performance Certificate (EPC) with no outstanding recommendations for loft or cavity wall insulation (unless the property is listed or such insulation is not technically feasible). Scotland and Northern Ireland operate separate incentive frameworks. Crucially, the application must be submitted by an MCS-certified (Microgeneration Certification Scheme) installer on behalf of the property owner — homeowners cannot apply directly.

In 2026, the grant values stand at £7,500 for air source heat pumps (ASHPs), £7,500 for ground source heat pumps (GSHPs) and water source heat pumps, and £5,000 for biomass boilers. These are one-off capital grants paid directly to the installer, who deducts the amount from the customer's invoice. There is a limit of one grant per property, and the existing heating system must currently use fossil fuels or direct electric heating. The scheme is funded until March 2028, though annual budget caps may apply.

To access the grant, property owners should first obtain quotes from MCS-certified installers and ensure the property meets EPC requirements. The installer then registers the application on the Ofgem BUS portal before installation begins. Once the work is completed and confirmed, Ofgem releases the grant payment to the installer. Homeowners are advised to check the Ofgem and GOV.UK websites for the latest eligibility criteria, as scheme rules can be updated. It is also recommended to obtain at least two or three installer quotes to ensure competitive pricing net of the grant.

Note: This article does not constitute legal or financial advice. Please consult a qualified expert or MCS-certified installer for guidance specific to your property and circumstances.

Umsetzungs-Checkliste

1. Check property eligibility: valid EPC with no outstanding insulation recommendations
2. Confirm existing heating system uses fossil fuels or direct electric heating
3. Find a registered MCS-certified installer via the MCS website or Ofgem's approved list
4. Obtain at least two to three quotes (grant is deducted from installer invoice)
5. Ensure installer submits the BUS application to Ofgem before installation commences
6. Confirm installation is completed to MCS standards and documentation is issued
7. Grant payment is made by Ofgem directly to the installer – verify invoice reflects deduction