The UK government’s Boiler Upgrade Scheme offers homeowners a £7,500 grant to help replace gas or oil boilers with a low-carbon heat pump. With energy bills still a major concern for many households, it’s one of the most significant incentives currently available to make the switch to cleaner heating.

If you’ve come across the scheme but aren’t quite sure how it works in practice, here’s a clear and realistic guide.

What does the grant cover?

The £7,500 grant is designed to support the installation of heat pumps, most commonly air source systems, although ground source heat pumps can also qualify.

One of the more convenient aspects of the scheme is how the money is handled. You don’t need to apply for the grant yourself or wait to be reimbursed. Instead, your installer applies on your behalf and the grant is deducted directly from the total cost.

In simple terms, the price you’re quoted is already reduced, so you only pay the difference.

Who is eligible?

The scheme is available to homeowners and landlords in England and Wales. To qualify, you’ll need to own the property and have a valid Energy Performance Certificate (EPC).

Your EPC must not show any outstanding recommendations for loft or cavity wall insulation. This requirement exists because heat pumps rely on homes being reasonably well insulated to perform efficiently.

The scheme is currently set to run until 2028, although funding is allocated each year, so availability may vary over time.

How heat pumps actually work

Heat pumps work differently from traditional boilers. Rather than generating heat by burning fuel, they extract heat from the outside air and transfer it into your home.

Even in cold weather, there is still heat energy in the air. A heat pump captures this energy, compresses it to increase the temperature, and then uses it to heat your radiators and hot water.

Because of this, heat pumps can be highly efficient, often producing several units of heat for every unit of electricity used.

Is a heat pump right for your home?

Heat pumps don’t behave like gas boilers. Instead of short bursts of high heat, they tend to run at lower temperatures for longer periods, maintaining a steady and consistent warmth.

This is where insulation becomes crucial. A well-insulated home keeps that steady heat inside, allowing the system to run efficiently without working harder than it needs to.

In some cases, larger radiators or minor system upgrades may be required to get the best performance. A proper installation should always begin with a heat loss assessment to determine exactly what your home needs.

If that step is skipped, it’s usually a sign to proceed with caution.

What might it cost after the grant?

Costs can vary depending on the size of the property and the complexity of the installation, but many air source heat pump systems fall somewhere between £9,000 and £13,000 before the grant is applied.

With the £7,500 Boiler Upgrade Scheme discount, that brings typical costs down significantly.

For example, Octopus Energy reports that most of their heat pump installations fall between £2,500 and £7,500 after the grant, with an average net cost of around £4,459. Smaller or simpler properties may come in lower, while more complex homes may sit toward the higher end of that range.

Will it reduce your energy bills?

Whether a heat pump will save you money depends on your current heating system and how efficient your home is.

Homes currently using oil, LPG, or electric heating often see the biggest potential savings. For properties on mains gas, the financial benefit can be smaller, but there are still advantages in terms of stability and reduced exposure to future gas price increases.

Electricity pricing also plays a role, so being on a competitive tariff can make a noticeable difference over time.

Where to find more information

The scheme is administered by Ofgem, and all applications are handled through MCS-certified installers. These installers will apply for the grant on your behalf and include it in your quote.

To get started, search for the Boiler Upgrade Scheme on the Ofgem website to check the latest eligibility criteria and find approved installers in your area.

Final thoughts

The Boiler Upgrade Scheme is one of the most generous home energy incentives currently available in the UK. For the right property, it can significantly reduce the upfront cost of switching to low-carbon heating.

That said, the success of a heat pump depends heavily on how well the home is prepared for it. Good insulation and a properly designed system make all the difference.

If you’re considering making the switch, it’s often worth focusing on insulation first. Once that foundation is in place, a heat pump becomes a much more effective and future-proof option.