How much is the BUS grant for a heat pump?

The Boiler Upgrade Scheme offers £7,500 for air source heat pumps (ASHP) and ground source heat pumps (GSHP), and £5,000 for biomass boilers. The grant is paid directly to the MCS-certified installer, who deducts it from your quote. The scheme runs until March 2028.

What are the eligibility criteria for BUS?

You must own the property (or be a landlord), have a valid EPC with no outstanding loft or cavity wall insulation recommendations, replace an existing fossil fuel heating system, and use an MCS-certified installer. New builds and social housing are not eligible. The property must be in England or Wales.

Do I need an EPC for the BUS grant?

Yes, a valid EPC (less than 10 years old) is required. If the EPC recommends loft insulation or cavity wall insulation, these must be installed before the heat pump application is submitted. Other EPC recommendations do not need to be actioned.

Can landlords apply for the BUS grant?

Yes, private landlords can apply for the BUS grant for properties they own and rent out. The same eligibility criteria apply: valid EPC, existing fossil fuel heating, MCS installer, and insulation recommendations addressed.

How long does the BUS grant application take?

Your MCS installer applies on your behalf through the Ofgem portal. Applications are typically processed within 2-4 weeks. The grant voucher is valid for 3 months from issue, during which the installation must be completed. Payment goes directly to the installer.

Boiler Upgrade Scheme (BUS) Grant Calculator

Check eligibility for the BUS grant, calculate the grant amount for ASHP, GSHP, or biomass, and estimate net cost after grant.

Heat Pump / Boiler Type

Technology you are installing

Property Type

Must be owner-occupied or landlord

Current Heating System

What you are replacing

Estimated Installation Cost

Total quoted cost before grant

Have Valid EPC?

Less than 10 years old

Loft Insulation Done?

EPC recommendation addressed

Cavity Insulation Done?

EPC recommendation addressed

How We Calculate This

This calculator checks your eligibility for the Boiler Upgrade Scheme grant and calculates the financial benefit including the grant amount, net installation cost, and payback period.

Grant amounts (2024-2028)

Air source heat pump: £7,500
Ground source heat pump: £7,500
Biomass boiler: £5,000

Key eligibility requirements

Property in England or Wales
Valid EPC with loft/cavity recommendations addressed
Replacing existing fossil fuel heating
MCS-certified installer and equipment
Not a new build or social housing

Frequently Asked Questions

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Last updated: March 2026

All calculations are estimates. Verify with your supplier.