What is the Boiler Upgrade Scheme?
An overview of the BUS grant, how it provides up to £7,500 towards heat pump installations for UK homeowners and the government’s goal of replacing gas boilers.
How much grant can you get?
Current BUS grant amounts for air-source heat pumps (£7,500), ground-source heat pumps (£7,500) and biomass boilers (£5,000), and how the payment works.
Who is eligible?
The eligibility criteria for the BUS grant, including property type, EPC requirements, existing heating system rules and who cannot apply.
How to apply step by step
A step-by-step guide to the BUS application process, from finding an MCS installer to receiving the voucher, typical timelines and what paperwork you need.
EPC requirements explained
What EPC rating you need for the BUS grant, what to do if your home does not meet the threshold and how to improve your rating before applying.
What the grant covers & does not cover
Which costs the BUS grant can be applied to, what it does not cover (radiators, underfloor heating, insulation) and how to budget for the remaining cost.
Common reasons for rejection
The most common reasons BUS applications are rejected, including EPC issues, ineligible properties, installer errors and how to avoid them.
BUS grant timeline & deadlines
How long the BUS application takes from start to finish, voucher validity periods, the scheme’s extension to 2028 and current processing times.
Combining BUS with other funding
Whether you can combine the BUS grant with ECO4, LA Flex, 0% VAT relief or other schemes, and the rules around stacking funding.
Frequently asked questions
Answers to the most common questions about the Boiler Upgrade Scheme, including landlord eligibility, new builds, second homes and what happens if your installer withdraws.