Costs & Deals
Best heat pump deals UK: how to get a cheap installation in 2026
Last updated 2026-10-26
A typical air source heat pump in the UK costs between £9,000 and £14,000 installed, so it pays to hunt for the best heat pump deal rather than accepting the first price you are quoted. Done properly, buying well can cut £2,000–£4,000 from your final bill without cutting corners on quality.
But the cheapest heat pump deal is not just the lowest sticker price. The best-value installations combine the government’s £7,500 Boiler Upgrade Scheme grant, several competing quotes from MCS-certified installers, a well-timed installation slot, and a correctly sized system that will actually save you money on running costs for the next 15–20 years.
This guide walks through every legitimate way to reduce the cost of a heat pump in the UK in 2026 — grants, seasonal pricing, negotiation, and quote comparison — plus the warning signs that a “bargain” quote will cost you more later.
The £7,500 grant is the biggest heat pump deal in the UK
Nothing a private installer offers will beat the Boiler Upgrade Scheme (BUS), which gives you a £7,500 voucher towards an air source heat pump, deducted directly from your invoice. You never handle the money: your MCS-certified installer applies for the voucher on your behalf and knocks the full amount off your quote.
That makes BUS the anchor of every good deal:
- Typical air source heat pump: £9,000–£14,000 installed, reduced to £1,500–£6,500 after the grant.
- Ground source heat pump: £15,000–£35,000 installed, with a £7,500 grant for a vertical system.
- No income cap and no property-value test: eligibility is only that you are replacing a fossil fuel boiler in an existing home (new-build self-build and social landlords follow different rules).
For the full rules, deadlines and application steps, read our Boiler Upgrade Scheme guide. If you are on benefits or a low income, don’t stop there: the ECO4 scheme can fund a completely free heat pump and insulation, and homeowners in Scotland and Wales have additional schemes. If you qualify for ECO4, that beats any commercial deal.
What actually drives the price of a heat pump quote
Comparing quotes is easier when you know which parts of the job cost the most. A typical £11,000 air source installation breaks down roughly like this:
- Heat pump unit (£4,500–£7,000): the brand, output in kW, and refrigerant type set the base cost. Premium brands like Vaillant, Mitsubishi and Daikin sit at the top of the range — see our best heat pump brands comparison for value picks.
- Hot water cylinder (£1,000–£1,800): most conversions need a larger, low-temperature cylinder for hot water.
- Radiator upgrades (£1,000–£3,500): only if your existing radiators are undersized. Check before you pay — many homes need far fewer replacements than expected, as we explain in our heat pump radiators guide.
- Labour, buffers, controls and commissioning (£2,000–£4,000): a two-to-three day installation, system design and MCS paperwork.
Every legitimate saving below attacks one of those lines without making the system smaller than your home needs. A correctly sized unit matters: an undersized heat pump is a false economy that costs you every winter, so start with our heat pump sizing guide to check the kW figures on each quote.
Seven ways to get the best heat pump deal
- Get at least three MCS-certified quotes. This is the single most effective money-saver. Installers price the same job very differently — differences of £2,000–£4,000 for an identical specification are common. Collect itemised quotes so you can compare like with like, and let each installer know they are competing; many sharpen their pencil when they know two rivals are in play.
- Compare the net price, not the grant headline. Because the £7,500 is a fixed deduction, a cheaper gross quote is always a cheaper net price. Ask explicitly for the gross cost breakdown on every quote. A handful of installers quietly inflate gross prices on grant-backed jobs, so reviewing pre-grant costs across quotes is your protection against paying the grant back to the installer.
- Time your installation for the off-peak season. Installation diaries fill up from late September through February with households racing to beat winter. Ask for a late spring or summer installation and you will often get a faster slot, a keener quote, and more installer attention during commissioning. A shoulder-season job can shave 5–10% off labour.
- Keep the radiators and cylinder you can. Radiator and cylinder upgrades add some of the largest variable costs to a quote. If a room-by-room heat-loss calculation says specific radiators are big enough to run at 45–50°C flow temperature, don’t replace them. Our flow temperature guide explains how lower flow temperatures make more of your existing radiators usable.
- Look for manufacturer spring promotions and cashback. Most large brands (Vaillant, Daikin, Mitsubishi, Samsung) run seasonal promotions in the UK — extended warranty years, free cylinders, or installer cashback that gets passed into your quote. Ask each installer what manufacturer deals are live this quarter; you can only claim if you ask.
- Check regional and local top-up schemes. £7,500 is the headline, but some households stack more support: ECO4 for low-income households, council-led flex schemes, pensioner-focused grants, and Scottish and Welsh home-energy schemes. Local stacking can knock another £1,000–£5,000 off certain installations.
- Negotiate the whole package, not just the unit. If your quotes are close, negotiate on the extras: a free smart control or weather compensation upgrade, electricity tariff advice, and the first annual service are often worth £300–£800 combined and are things installers can throw in cheaply.
Typical heat pump prices after the grant (2026)
| System | Installed price (typical) | BUS grant | You pay |
|---|---|---|---|
| 8–10 kW ASHP, small-medium home, existing radiators kept | £9,000–£10,500 | £7,500 | £1,500–£3,000 |
| 10–13 kW ASHP + new cylinder + some radiators | £11,000–£13,500 | £7,500 | £3,500–£6,000 |
| Large home ASHP + full radiator upgrade | £13,000–£16,000 | £7,500 | £5,500–£8,500 |
| Free ECO4 installation (if eligible) | funded 100% | ECO4 | £0 |
Indicative national ranges as of October 2026. Prices vary by region, property and system specification — always compare itemised quotes.
Red flags: when a heat pump deal is too good to be true
- No MCS certification. If the installer isn’t MCS-certified, the installation won’t qualify for the £7,500 grant and may not meet building regulations. Verify certification before inviting a quote — see our MCS installer checklist.
- No room-by-room heat loss survey. A quote based only on floor area means the unit will be guessed, not sized. Guessing small is the classic way to make a quote look cheap — and it leaves you cold in January.
- A price thousands below every other quote. Check what’s missing: cylinder, radiator work, buffering, filtration or proper commissioning paperwork.
- Pressure to sign today. Genuine grant vouchers don’t vanish overnight. A “one-day-only” discount is a sales tactic, never a real deal.
- Quotes that won’t show the gross (pre-grant) price. Transparency here is non-negotiable for comparing offers.
The deal that matters most: the right installer
A well-installed, correctly sized mid-range heat pump from a good local installer will outperform a premium unit badly fitted — and cost less to run for two decades. When you compare quotes, score installers on the quality of their survey and design work, not only the price. Our how to choose a heat pump installer guide has the full checklist, and our installation process walkthrough shows what a complete job should include.
In short: the best heat pump deal in the UK is the £7,500 grant, locked in with three or more quotes, the cheapest installation season, and a system designed properly in the first place. Cut the price without cutting those three and you’ve won.
Frequently asked questions
What is the best heat pump deal available in the UK right now?
The biggest single discount on any UK heat pump installation is the government’s £7,500 Boiler Upgrade Scheme grant, which is deducted directly from your installation quote. A typical air source heat pump costs £9,000–£14,000 installed, so the grant reduces the price to roughly £1,500–£6,500. Stacking the grant with three or more MCS-certified quotes and an off-peak installation slot is the best way to pay less.
When is the cheapest time of year to buy a heat pump?
Late spring and summer are usually the cheapest times to install a heat pump because installers have empty diaries after the winter rush and are more willing to discount. Demand peaks between September and December when households panic about winter heating, so installation prices and waiting lists are highest then.
Can installers charge more when the £7,500 grant is applied?
Some do inflate quotes when they know a grant is being applied, which is why you should compare the net price you pay across several MCS-certified installers rather than the headline grant amount. Ask each installer for the full pre-grant cost breakdown so quotes are directly comparable.
How many heat pump quotes should I compare?
Get at least three written, itemised quotes from MCS-certified installers. Homeowners who compare three or more quotes typically save 10–20% (£1,000–£2,500) on the same specification of installation compared with accepting the first quote they receive.
Are cheap heat pump deals too good to be true?
Sometimes. Be cautious of quotes that are dramatically cheaper than competitors, as they usually mean a smaller or undersized unit, skipped heat-loss surveys, no radiator or hot water upgrades, or no proper commissioning. Only MCS-certified installations qualify for the £7,500 grant, so verify certification before you commit.
Can I get a free or heavily subsidised heat pump instead of paying?
Yes, if you qualify. The ECO4 scheme can fund a fully free heat pump plus insulation for low-income households on benefits, and schemes like Nest in Wales and Home Energy Scotland offer additional support. Check your eligibility for grant funding before comparing commercial deals.
Want the best possible price on a heat pump? Check your grant eligibility first — the £7,500 Boiler Upgrade Scheme voucher is the biggest discount available on any installation — then compare quotes from MCS-certified installers in your area.
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