When comparing heat-pump installation prices, homeowners often see two separate forms of financial support: a grant through the Gov Boiler Upgrade Scheme and VAT relief for qualifying energy-saving installations. They are related to home efficiency, but they operate differently.
Understanding both can help you read a quotation correctly and avoid assuming a discount has been applied twice.
What Is the Boiler Upgrade Scheme Grant?
The official Boiler Upgrade Scheme (BUS) operates in England and Wales. It supports eligible owners installing approved low-carbon heating systems through an MCS-certified installer.
Current standard grant values include £7,500 for eligible air-to-water and ground source heat pumps, £2,500 for eligible residential air-to-air heat pumps, and £5,000 for qualifying biomass boilers. Certain off-gas-grid properties replacing oil or LPG with eligible water-based heat pumps may receive £9,000 until 31 March 2027.
Your installer handles the application and should deduct the grant on both the quotation and the final invoice. BUS is not a cash refund paid to homeowners after the work.
What Does 0% VAT Mean?
Under current HMRC guidance, qualifying installations of specified energy-saving materials in residential accommodation can benefit from 0% VAT until 31 March 2027. Eligible technologies include certain fixed air source and ground source heat pumps, subject to the applicable tax rules.
The zero rate is a tax treatment, not an extra £7,500 grant or a payment from Ofgem. Your installer is responsible for applying the correct VAT treatment to the work and equipment. Not every product bought separately or every unrelated building service automatically qualifies.
From 1 April 2027, the published rules generally provide for a reduced 5% VAT rate on qualifying installations unless the law changes. Check the rules applicable on your installation date.
How Do the Grant and VAT Relief Work Together?
Consider a purely illustrative example: an eligible heat-pump installation is quoted at £13,000 with the applicable VAT correctly assessed at 0%, and the household qualifies for a £7,500 BUS grant. The illustrative remaining installation charge would be £5,500.
This example does not mean you subtract another 20% from £13,000. A quote already prepared using 0% VAT does not contain a 20% VAT charge to remove. The actual tax treatment, invoice scope and grant eligibility must be assessed by the installer.
If an offer advertises “£7,500 plus 20% off,” ask for a written explanation of its price basis and the VAT treatment rather than relying on promotional wording.
Which Costs Need Special Attention?
A full project may involve a hot-water cylinder, radiators, controls, electrical work and modifications to pipework. Some work directly connected with a qualifying energy-saving installation may fall within the relevant VAT relief, but unrelated refurbishment work may be treated differently.
Ask for a clear invoice showing the installation cost, the VAT treatment, the BUS grant and the final amount payable. HMRC’s VAT Notice 708/6 is the source for technical tax conditions; if a quotation is complex, ask your installer or a qualified tax adviser for clarification.
Do You Need to Apply for VAT Relief Separately?
In a typical eligible installation, the installer charges the appropriate VAT rate on the invoice; the homeowner does not submit the BUS voucher application or a separate HMRC claim for the zero rate. BUS eligibility and VAT treatment should each be checked independently.
Also note that the VAT relief is broader geographically than BUS: the specific Boiler Upgrade Scheme only applies to England and Wales, while the VAT rules for energy-saving materials have their own UK-wide provisions.
For a detailed starting point on Gov Boiler Upgrade Scheme grant eligibility, visit Berks Insulation’s guide and confirm your installer’s quotation against the latest Ofgem and HMRC information.
FAQs
Is 0% VAT the same as a government grant?
No. One changes the VAT charged on qualifying installation supplies; the other is an eligible heating-installation grant.
Does every heat-pump purchase get zero VAT?
No. The relief has conditions and generally concerns qualifying installed energy-saving materials, not every standalone product purchase.
Will the current 0% rate last indefinitely?
The published relief runs to 31 March 2027, after which qualifying installations generally revert to 5% unless rules change.
Final Thoughts
The smartest way to compare heat-pump quotes is to ask for a transparent breakdown: equipment and work, VAT, BUS grant and final payable price. That is more reliable than combining advertising claims into a guessed total saving.