Home Heat Pump Guide

Is the Heat Pump Grant Worth It?

You have heard that the government offers £7,500 towards a heat pump. That sounds generous. But is it actually worth going through the process? Does the grant make a heat pump a genuinely good financial decision, or does it merely take the edge off what is still an expensive investment?

This is an honest, numbers-driven assessment. We will look at what the grant covers, what it does not, and for which types of homeowner the Boiler Upgrade Scheme grant genuinely tips the balance.

What the Grant Actually Gives You

The Boiler Upgrade Scheme (BUS) provides a flat £7,500 towards the cost of an air source or ground source heat pump installation. This is not a percentage discount — it is a fixed sum, regardless of how much your installation costs.

Your installer applies to Ofgem on your behalf, and once approved, the £7,500 is deducted directly from your invoice. You pay the balance. There is no repayment, no interest, and no ongoing obligation. It is a genuine grant — free money.

Net Cost After the Grant

Here is what homeowners typically pay after the grant, based on real installation costs across the UK:

  • Small property (1-2 bed flat or terrace): Total cost £8,000–£10,000 → Net cost £500–£2,500
  • Medium property (3-bed semi): Total cost £10,000–£12,000 → Net cost £2,500–£4,500
  • Larger property (4-bed detached): Total cost £12,000–£15,000 → Net cost £4,500–£7,500
  • Complex installations: Total cost £15,000+ → Net cost £7,500+

For the majority of homes, the grant reduces the cost to somewhere between £2,000 and £5,000. That is comparable to — or less than — a mid-range gas boiler installation.

The Financial Case: When Is It Worth It?

Scenario 1: Replacing a Gas Boiler

This is the most common scenario and requires the most careful analysis. A new gas boiler costs £2,500 to £4,000 installed. After the BUS grant, a heat pump costs roughly the same — sometimes more, sometimes less depending on the property.

The running cost picture depends on your electricity and gas rates. At current Ofgem cap rates (24.50p/kWh electricity, 6.76p/kWh gas), a heat pump with a seasonal COP of 3.0 costs roughly 8.17p per kWh of heat delivered. A gas boiler at 92% efficiency costs roughly 7.35p per kWh of heat delivered.

That means a heat pump currently costs slightly more to run than gas — about £100 to £150 more per year for a typical home. However, this gap is expected to close and reverse as the government rebalances electricity and gas prices over the coming years.

Verdict for gas boiler replacement: Worth it if you value lower carbon emissions, expect energy prices to shift in heat pumps' favour, or are looking at the 15-20 year picture where the heat pump's longer lifespan (20+ years vs 12-15 for a boiler) delivers significant savings. Marginal if your only concern is minimising costs over the next five years.

Scenario 2: Replacing an Oil Boiler

This is where the grant becomes unquestionably worth it. Oil heating is expensive — typically 8p to 10p per kWh of heat, compared to 8.17p for a heat pump. Oil boilers also require annual servicing, tank maintenance, and replacement every 15 years.

After the £7,500 grant, a heat pump installation for an oil-heated property typically costs £3,000 to £6,000 — and immediately saves £200 to £500 per year in running costs. The payback period on the net investment is often under 10 years, and you eliminate the hassle of oil deliveries, tank maintenance, and volatile oil prices.

Verdict for oil boiler replacement: Absolutely worth it. The financial case is strong even before considering environmental benefits or the fact that oil boilers will eventually become difficult to maintain as the industry contracts. If you heat with oil, apply for the grant now — there is no sensible reason to delay.

Scenario 3: Replacing LPG

LPG is even more expensive than oil, often costing 10p to 13p per kWh of heat. The case for switching to a heat pump with the grant is overwhelming. Read our full LPG comparison for detailed figures.

Verdict for LPG replacement: The strongest financial case of all. The grant makes it a no-brainer.

Scenario 4: Replacing Electric Storage Heaters

Electric storage heaters typically cost 20p to 30p per kWh of heat. A heat pump at COP 3.0 costs roughly 8.17p — a saving of 60% to 70%. After the grant, the net installation cost of £2,000 to £5,000 can be recovered in running cost savings within two to four years.

Verdict for storage heater replacement: Exceptionally worth it. The savings are dramatic and immediate. See our full storage heater comparison.

When Might the Grant Not Be Worth It?

Honesty matters, so here are situations where the grant may not make the heat pump the best financial decision:

  • Your gas boiler is relatively new: If you replaced your boiler in the last three to five years and it is working well, there is no urgent financial reason to switch now. You might wait until it needs replacing.
  • Your property is very poorly insulated: A heat pump in a draughty, uninsulated property will not perform well. You may need to spend thousands on insulation first, which changes the payback calculation. Use the suitability checker to assess your property.
  • You are planning to move soon: If you are selling within two to three years, you may not recoup the net cost through running savings — though a heat pump can increase property value.
  • You cannot meet the eligibility criteria: If your EPC shows outstanding loft or cavity wall insulation recommendations, you will need to address those first. This adds cost but also improves your home's efficiency.

Beyond the Financial Case

Money is not the only factor. The grant also makes the following benefits more accessible:

  • Carbon reduction: A heat pump typically cuts your heating emissions by 50% to 70% compared to a gas boiler, and even more compared to oil or LPG
  • Energy independence: No more reliance on volatile gas or oil markets
  • Cooling capability: Many heat pumps can provide cooling in summer — increasingly valuable as UK summers get warmer
  • Future-proofing: Your home is prepared for tightening energy efficiency regulations and potential future restrictions on fossil fuel heating
  • Property value: Evidence suggests energy-efficient homes command a premium, particularly as EPC ratings become more important for sales and mortgages

How to Claim the Grant

The process is straightforward:

  1. Get quotes from MCS-certified installers
  2. Choose your installer and agree the specification
  3. Your installer applies to Ofgem for the BUS grant
  4. Ofgem approves the application (typically two to three weeks)
  5. Installation takes place
  6. The £7,500 is deducted from your final invoice

You do not need to do any paperwork yourself. The installer handles everything. Use our heat pump calculator to get an initial estimate of costs before requesting quotes.

Common Concerns Addressed

"£7,500 Doesn't Cover the Full Cost"

True, but it was never intended to. A new gas boiler costs £3,000+, and nobody expects that to be free. The grant closes most of the gap between heat pump and boiler costs, making the two options comparable on upfront price. When you factor in the heat pump's longer lifespan (20+ years versus 12-15 for a boiler), the total cost often works out lower.

"I've Heard Heat Pumps Are Expensive to Run"

This is outdated information. At current energy prices, a well-installed heat pump costs roughly the same as gas to run — and significantly less than oil, LPG, or electric heating. As electricity prices fall relative to gas (a stated government objective), heat pump running costs will improve further.

"The Grant Might Increase — Should I Wait?"

There are no current plans to increase the BUS grant beyond £7,500. Waiting carries the risk of the scheme closing, budget caps being reached, or installer availability becoming constrained as demand grows. If you are ready now, apply now.

Frequently Asked Questions

Is the £7,500 heat pump grant means-tested?

No. The BUS grant is available to all eligible homeowners regardless of income. It is not means-tested. Separate schemes like ECO4 provide additional support for low-income households.

Do I have to pay the grant back?

No. The BUS grant is a genuine grant, not a loan. There is no repayment required under any circumstances.

Can landlords get the grant?

Yes. Landlords who own the property and meet the standard eligibility criteria can apply for the BUS grant.

Does the grant cover the hot water cylinder?

Yes. The grant covers the full heat pump system including the unit, hot water cylinder, controls, and installation labour. The £7,500 is deducted from the total invoice.

What if my installation costs less than £7,500?

This is extremely unlikely for a full heat pump installation. If it did happen, the grant would be capped at the actual installation cost — you cannot receive more than the job costs.

How long does the grant application take?

Ofgem typically processes BUS applications within two to three weeks. Your installer submits the application and will keep you updated on progress.