How much does a heat pump cost to install in the UK in 2026?

A typical air source heat pump installation costs roughly £8,000 to £15,000 before any grant. Ground source heat pumps cost more, typically £14,000 to £25,000, due to the groundwork involved. After the £7,500 Boiler Upgrade Scheme grant, most air source installations come down to somewhere between £500 and £8,500.

Are heat pumps cheaper to run than a gas boiler?

On a standard electricity tariff, running costs are close to gas, sometimes slightly cheaper, sometimes slightly more, depending on your home's insulation and the heat pump's efficiency. On a dedicated heat pump electricity tariff, savings are more consistent, typically £200 to £400 a year. If you're currently on oil, LPG, or direct electric heating rather than mains gas, the savings are much larger and more certain, often £600 to £2,400 a year.

How long does it take a heat pump to pay for itself?

It depends heavily on your starting point. If your boiler needs replacing anyway, the extra cost after the grant is small and payback can be close to immediate. If you're replacing a working gas boiler early, typical payback is 4 to 15 years depending on your tariff and insulation. For homes moving off oil or LPG, payback is often faster, commonly 2 to 4 years.

Heat Pump Costs in 2026 vs the Savings You'll Make

The honest version: on a standard tariff, running costs are close to gas — the real case for a heat pump in 2026 rests on the £7,500 grant, a longer lifespan, and (if you switch tariff) a genuine ongoing saving. Here's the real maths, not the marketing version.

What installation actually costs in 2026

Prices vary by property size, system type, and how much pipework or radiator work is needed — but current UK installer quotes cluster fairly consistently:

System	Typical installed cost (before grant)	Typical cost after £7,500 grant
Air source heat pump (2-3 bed)	£8,000 – £12,000	£500 – £4,500
Air source heat pump (4-5 bed)	£10,000 – £15,000	£2,500 – £7,500
Ground source heat pump	£14,000 – £25,000	£6,500 – £17,500

Ranges reflect typical 2026 UK installer quotes for straightforward retrofits. Older properties needing bigger radiators, a new hot water cylinder, or extra groundwork can add £2,000–£5,000 on top.

Worth knowing The grant is applied by your MCS-certified installer directly to your quote — you never handle the £7,500 yourself, and you don't pay it upfront and claim it back later.

Running costs: the part everyone oversimplifies

This is where a lot of marketing gets ahead of the real numbers. At current 2026 Ofgem price cap rates (roughly 24-26p/kWh electricity vs 6-7p/kWh gas), the effective cost of heat from a well-installed heat pump and a well-installed gas boiler are genuinely close — sometimes the heat pump is a little cheaper, sometimes a little more, depending on your home's insulation and the specific efficiency (SCOP) your installer achieves.

Heating source	Typical annual running cost
Gas boiler (standard 3-bed home)	£960 – £1,200
Air source heat pump, standard tariff	£700 – £1,000
Air source heat pump, dedicated heat pump tariff	£400 – £700
Oil, LPG, or direct electric heating (for comparison)	£1,400 – £2,400+

Where the real savings come from

A dedicated heat pump electricity tariff — several suppliers (Octopus, E.ON Next, EDF among them) now offer tariffs with several hours a day of cheaper electricity aimed specifically at heat pump owners, typically 10-17p/kWh instead of the standard ~25p/kWh rate. This is genuinely the single biggest lever on your ongoing running cost.
Switching off oil, LPG, or direct electric heating — if this is your starting point rather than mains gas, the running-cost case is far stronger and much less debatable, often £600-£2,400 a year in savings.
A well-insulated home — heat pumps run most efficiently at lower flow temperatures, which insulation and correctly-sized radiators support. Installation quality and proper sizing matter more to your real-world running cost than almost anything else.

How long does it actually take to pay back?

Payback depends heavily on your specific starting point — there isn't one honest single number, whatever a sales brochure might tell you.

Your boiler needs replacing anyway: the fair comparison is a heat pump against a new gas boiler, not against your old one — and after the grant, the price gap can be small. Payback in this scenario is close to immediate.
You're replacing a working gas boiler early, on a standard tariff: typical payback is long, sometimes 15-30+ years in a well-insulated home already on efficient gas heating — genuinely longer than many heat pumps' working life. Worth being honest with yourself about this scenario.
Same as above, but on a dedicated heat pump tariff: payback typically drops to roughly 4-15 years, since the £200-£400/year saving compounds meaningfully.
You're moving off oil or LPG: payback is usually fastest here, often 2-4 years, because the running-cost gap against oil/LPG is large and consistent.

Be wary of Anyone quoting one single "average payback" figure without asking about your current heating fuel, tariff, and insulation first — those three factors change the answer more than anything else.

The two things that aren't debatable

Lifespan. A well-maintained heat pump typically lasts 20-25 years, against 12-15 years for a gas boiler — meaning a heat pump bought today likely avoids at least one full boiler replacement cycle over its lifetime.
Carbon. A typical home switching from gas to a heat pump avoids in the region of 35 tonnes of CO₂ over 20 years, regardless of exactly how the running-cost maths lands.

What this means for your decision

If your boiler's on its way out, or you're on oil, LPG, or direct electric heating, the case for switching now — while the £7,500 grant is available — is genuinely strong on cost grounds alone. If you're on mains gas with a boiler that's got years left in it, the honest picture is more balanced: you're paying largely for a longer-lasting, lower-carbon system with running costs that are competitive rather than dramatically cheaper, unless you also switch to a heat pump-specific tariff.

The single biggest factor in whether these savings actually materialise is installation quality — correct sizing, correct flow temperature, and genuine MCS certification.

Read: what MCS certification actually checks →

Heat pump costs in 2026 vs the savings you'll make