Boiler Upgrade Scheme statistics: March 2026

These statistics show the uptake of the Boiler Upgrade Scheme to date including the number of vouchers applications and redemptions, as well as the costs of installation. Enquiries about these statistics should be directed to: amelia.ash@energysecurity.gov.uk ### Cover Sheet | Boiler Upgrade Scheme (BUS) monthly statistics England and Wales: March 2026 | | | --- | --- | | Statistician responsible: | | | Amelia Ash | | | Amelia.Ash@energysecurity.gov.uk | | | 07436 044 936 | | | Oliver Cook | | | Oliver.Cook@energysecurity.gov.uk | | | Luke Harry | | | Luke.Harry@energysecurity.gov.uk | | | Press enquiries: | | | Matthew Harris | | | Matthew.Harris@energysecurity.gov.uk | | | 0300 068 8084 | | | Publication dates | | | These statistics were published on 30 April 2026. | | | These statistics will next be published on 28 May 2026. | | | A publication timetable for all upcoming DESNZ statistics is available online. | | | Description | | | This spreadsheet forms part of the statistics publication for the Boiler Upgrade Scheme (BUS) produced by the Department for Energy Security and Net Zero (DESNZ). The data presented show the uptake in the scheme to date: number of vouchers applications and redemptions, as well as costs of installation. | | | Data period | | | This workbook contains cumulative, monthly, quarterly and annual data. Figures are published one month in arrears. | | | Amendments | | | Amendments to these published statistics may occur when: a. revised or validated data is subsequently received from a data supplier, for example, due to the approval processes involved there may be a time lag in an application appearing in the figures or an applicant may cancel or re-submit applications in order to change certain details b. a figure was incorrect due to a typographical or similar error c. methodological improvements For cumulative and monthly statistics, these changes will be reflected in the next statistical release. For quarterly and annual statistics, any changes will be updated on a quarterly basis in January, April, July and October. If the revision is considered to be major and has a material impact that could affect decisions made on the basis of the data, then an unscheduled correction will be made as soon as possible, along with an explanation of the revision and any impact. | | | For more information, see the full DESNZ Revisions Policy. | | | Pre-release access | | | Some ministers and officials receive access to these statistics up to 24 hours before release. Details of the arrangements for doing this and a list of the ministers and officials that receive pre-release access to these statistics can be found in the DESNZ statement of compliance with the Pre-Release Access to Official Statistics Order 2008. | | | Statistical disclosure control | | | Some cells in the tables may be suppressed to prevent disclosure. Cost averages that are based on between 1 and 4 underlying records inclusive will be suppressed. Some values greater than 4 may also be suppressed where only one value within the group was suppressed to prevent disclosure. | | | Further information | | | The data tables and accompanying sheets have been edited to meet legal accessibility regulations. | | | Some tables refer to notes. When notes are mentioned, the note marker is presented in square brackets. The note text can be found in the Notes tab. | | | Feedback on this publication is welcomed and can be sent to: | | | amelia.ash@energysecurity.gov.uk. | | ### Contents | Contents | | | --- | --- | | These statistics provide an update on the uptake of the Boiler Upgrade Scheme (BUS). | | | Worksheet name | Worksheet content | | Scheme background | Background to the Boiler Upgrade Scheme (BUS). | | Glossary | Glossary of terms | | Commentary | Headline statistics included in this release | | Charts | Charts visualising some of the main statistics within this release | | Boiler Upgrade Scheme (BUS) tables | | | Cumulative applications and redemptions | | | 1.1 | Number of vouchers by status and technology type, England and Wales, May 2022 to March 2026 | | 1.2A | Number of applications by status, region and technology type, England and Wales, May 2022 to March 2026 | | 1.2B | Number of domestic applications by status, region and technology type, per 10,000 households England and Wales, May 2022 to March 2026 | | Cumulative redemptions by characteristics | | | 1.3 | Number of redemptions paid by fuel type displaced and technology type, England and Wales, May 2022 to March 2026 | | 1.4 | Number of redemptions paid by whether the property is domestic or non-domestic and technology type, England and Wales, May 2022 to March 2026 | | 1.5 | Number of redemptions paid by whether the property is in a rural or an urban classification, England and Wales, May 2022 to March 2026 | | 1.6 | Number of redemptions paid by whether the property is on or off the gas grid, England and Wales, May 2022 to March 2026 | | Monthly | | | M1.1 | Number of monthly applications by status and technology type, England and Wales, May 2022 to March 2026 | | M1.2 | Number of heat pump applications by status, region and month, England and Wales, May 2022 to March 2026 | | Quarterly - updated in January, May, July and October only | | | Q1.1A | Median, lower quartile and upper quartile reported cost (£) and capacity (kW) of redemptions paid by technology type and quarter, England and Wales, May 2022 to March 2026 | | Q1.1B | Inflation adjusted (real) median, lower quartile and upper quartile reported cost (£) of redemptions paid by technology type and quarter in 2025 Q4 prices, England and Wales, May 2022 to March 2026 | | Q1.2 | Number of redemptions paid by Local Authority, England and Wales, May 2022 to March 2026 | | Q1.3 | Number of redemptions paid by Parliamentary Constituency, England and Wales, May 2022 to March 2026 | | Annual - updated in January, May, July and October only | | | A1.1A | Number of applications by status, region and technology type broken down by financial year, England and Wales, 2022/23 to 2025/26 | | A1.1B | Number of domestic applications by status, region and technology type per 10,000 households broken down by financial year, England and Wales, 2022/23 to 2025/26 | | A1.2 | Number of redemptions paid by fuel type displaced and technology type broken down by financial year, England and Wales, 2022/23 to 2025/26 | | A1.3A | Median reported cost (£) of redemptions paid by technology type and capacity band broken down by financial year, England and Wales, 2022/23 to 2025/26 | | A1.3B | Inflation adjusted (real) median reported cost (£) of redemptions paid by technology type and capacity band broken down by financial year in 2025/26 prices, England and Wales, 2022/23 to 2025/26 | | A1.4 | Number of redemptions paid by whether the property is domestic or non-domestic broken down by financial year, England and Wales, 2022/23 to 2025/26 | | A1.5 | Number of redemptions paid by whether the property is in a rural or an urban classification broken down by financial year, England and Wales, 2022/23 to 2025/26 | | A1.6 | Number of redemptions paid by whether the property is on or off the gas grid broken down by financial year, England and Wales, 2022/23 to 2025/26 | | A1.7 | Number of redemptions paid by Local Authority broken down by financial year, England and Wales, 2022/23 to 2025/26 | | A1.8 | Number of redemptions paid by Parliamentary Constituency broken down by financial year, England and Wales, 2022/23 to 2025/26 | | A1.9 | Number of redemptions paid by technology type and fuel type displaced and region broken down by financial year, England and Wales, 2022/23 to 2025/26 | | Notes | | ### Scheme background | Scheme background | | | | | | --- | --- | --- | --- | --- | | In order to meet the UK's target of reducing emissions to net zero by 2050, virtually all heating of buildings will need to be decarbonised. The Boiler Upgrade Scheme (BUS) aims to incentivise and increase the deployment of low carbon heating technologies by providing an upfront capital grant towards the cost of an installation of air-to-water heat pumps (AWHP), air-to-air heat pumps (AAHP), ground source heat pumps (GSHP) and, in limited circumstances, biomass boilers. | | | | | | BUS has three main objectives for 2025/26 to 2029/30: | | | | | | 1) Increase deployment of low carbon heating systems, particularly heat pumps but also heat batteries and in limited circumstances biomass boilers in 390,000 homes and small non-domestic buildings through full budget utilisation between 2025/26 and 2029/30, supporting the aims of the clean energy superpower mission to decarbonise homes and meet Net Zero targets. | | | | | | 2) Contribute to decarbonising heating in England and Wales and to meeting carbon budgets by delivering up to 0.5, 3.4, 4.0 and 4.1 MtCO2e of carbon savings over Carbon Budgets 4, 5, 6, and 7 and 14.0 MtCO2e over the lifetime of the extended scheme. Measured by calculating the renewable heat generated from BUS-funded installations of low-carbon heating technologies. | | | | | | 3) Stimulating demand for low carbon heating technologies via the BUS grant to grow the market. With full budget utilisation, this will subsequently support 13,600 direct full-time equivalent (FTE) and 3,800 indirect FTE up to March 2030, contributing significantly towards realising a 20-25% real terms reduction in the average cost of BUS-supported AWHP installation costs by 2030 relative to 2022/23 (compared to the scheme’s launch). | | | | | | An evaluation of the scheme against its objectives during its initial phase, between 2022/23 and 2025/26, is published on gov.uk. | | | | | | The scheme is administered by the Office of Gas and Electricity Markets (Ofgem) and is an installer-led scheme, meaning that the installer of the low-carbon heating technology submits a voucher application on behalf of the property owner. Ofgem then contacts the property owner, who will need to provide consent and confirm that the installer is acting on their behalf. Ofgem also carries out checks to confirm that the property is eligible before issuing a voucher. | | | | | | A voucher is redeemed when an installer completes an installation and submits a voucher redemption application which is subsequently approved by Ofgem. If approved, the grant will then be paid directly to the installer. The price paid by the property owner is the total cost of the installation less the value of the grant. | | | | | | To be eligible, all BUS installations must be Microgeneration Certification Scheme (MCS) certified. Vouchers are issued on a first come, first served basis, to applicants who meet the eligibility requirements until the budget cap for the financial year is reached. | | | | | | AWHP, AAHP and biomass boiler vouchers are valid for 3 months while GSHP vouchers are valid for 6 months. | | | | | | For more information about the scheme or for details on how to apply for a grant, please see the Ofgem website. | | | | | | The scheme is in its fifth year, with a budget of £400 million for 2026/27. The Government confirmed funding for further years up to 2029/30 through the Warm Homes Plan in January 2026. Across the first four years of the scheme, over £560 million was paid out through grants. | | | | | | Information on the total value of all grants paid to date and how much of the budget is remaining is published by Ofgem on a monthly basis. | | | | | | The current scheme grant values are: • £7,500 towards an air-to-water heat pump • £7,500 towards a ground source heat pump (including water source heat pumps and those on shared ground loops) • £2,500 towards an air-to-air heat pump • £5,000 towards a biomass boiler | | | | | | There have been a number of changes to the scheme and wider policy landscape since the launch of the BUS, including: | | | | | | 23 October 2023: Increase in grant levels for heat pump technologies from £5,000 for air-to-water heat pumps and £6,000 for ground sound heat pumps to £7,500 for both. | | | | | | 8 May 2024: Removal of the requirement to have no outstanding recommendations for loft and cavity wall insulation on the property’s Energy Performance Certificate (EPC) certificate. | | | | | | 29 May 2025: Updates to Permitted Development Rights (PDR) to allow the following without requiring planning permission: a heat pump to be installed within 1 metre of a property boundary; an increase in the size limit for heat pumps to accommodate larger, more efficient models; and allowing for double the number of heat pumps to be installed in a detached home. | | | | | | 21 April 2026: The Government announced that grants towards the cost of air-to-water heat pumps replacing oil or LPG heating systems will be increased to £9,000 for the remainder of the 2026/27 year. The change is expected to come into effect in July. | | | | | | 28 April 2026: Expansion of eligibility for multi-technology installations; the introduction of £2,500 grants for AAHPs; relaxing the requirement for a valid EPC; mandating that installers deduct the BUS grants from upfront costs; mandating the Microgeneration Certification Scheme (MCS) as the sole certification scheme. Statistics on the uptake of AAHPs will be incorporated into this release once the first grants have been paid. | | | | | | These statistics present information on the volumes of BUS voucher applications and redemptions that have taken place over the lifetime of the scheme. More generally, information on the number of heat pumps deployed in the UK is available in the quarterly DESNZ Heat Pump Deployment statistics. | | | | | | Further information | | | | | | Further information about the Boiler Upgrade Scheme and how to apply is available on gov.uk (published: 18 March 2022) | | | | | | Ofgem Boiler Upgrade Scheme Guidance | | | | | | Amendments to the Boiler Upgrade Scheme and how to apply is available on gov.uk | | | | | | Warm Homes Plan (published: 21 January 2026) | | | | | | BUS Extension Final Stage Impact Assessment (published: 25 March 2026) | | | | |