Are Heat Pumps Worth It in the UK? (2026)

We're not installers. We don't make money from selling heat pumps. So we can give you the straight answer: heat pumps are an excellent choice for many homes, but they're not right for everyone. The key factors are your current heating system, your home's insulation, the upfront cost you can manage, and whether you value lower carbon emissions.

The £7,500 BUS grant has transformed the economics. Before the grant was increased from £5,000, the payback period for gas boiler replacements was often 10–15 years. Now, with the higher grant and improved heat pump efficiency, payback for a typical gas-heated home is 3–10 years. For oil and LPG homes, it's even shorter.

But “worth it” isn't just about money. Heat pumps future-proof your home against rising gas prices and tightening regulations. The UK government has confirmed that gas boilers will be phased out of new builds and that existing boilers will eventually need replacing with low-carbon alternatives. Installing a heat pump now means you're ahead of the curve, rather than facing a rushed replacement later.

Payback period is the time it takes for your running cost savings to cover the net installation cost (after the BUS grant). Here's what it looks like for different scenarios.

Replacing a gas boiler: 3–10 years

If your net installation cost is £3,000 (after the £7,500 grant) and you save £300 per year on running costs, payback is around 10 years. If your net cost is lower (well-insulated terraced house) or your savings are higher (larger home, higher gas usage), payback drops to 3–5 years. Remember: a heat pump lasts 20–25 years, so you'll enjoy 10–22 years of pure savings after payback.

Replacing an oil boiler: 2–5 years

Oil is significantly more expensive per kWh than gas, and oil boilers are less efficient. Annual savings of £500–£1,200 are typical. With a net heat pump cost of £2,500–£5,000 after the grant, payback is usually 2–5 years. This is the strongest economic case for a heat pump in the UK.

Replacing LPG: 2–5 years

LPG costs are similar to oil, making the payback period equally attractive. If you're on LPG and your boiler is nearing the end of its life, a heat pump is almost always the better investment. You'll also reclaim the space used by the LPG tank.

Replacing electric storage heaters: 1–4 years

Electric storage heaters use electricity at 100% efficiency. A heat pump uses electricity at 300%+ efficiency (COP 3+). Your electricity bill could drop by up to two-thirds. With savings of £800–£1,200 per year, payback can be as quick as 1–2 years.

A heat pump is very likely worth it if:

• You're replacing oil, LPG, or electric storage heating. The running cost savings are substantial and payback is fast.
• Your home has reasonable insulation. Double glazing, loft insulation, and cavity wall insulation (if applicable) make a heat pump work at its best.
• Your gas boiler is over 10 years old. Rather than replacing it with another gas boiler (which will be increasingly obsolete), switching to a heat pump future-proofs your home while the £7,500 grant is still available.
• You care about reducing your carbon footprint. A heat pump produces roughly a quarter of the CO2 of a gas boiler, and this improves each year as the electricity grid gets greener.
• You're planning to stay in your home long-term. The longer you live there, the more savings you accumulate after the payback period.
• You have (or plan to have) solar panels. Solar panels generate free electricity that can power your heat pump, dramatically reducing running costs.

We believe in honest advice. A heat pump may not be the best choice if:

• Your gas boiler is relatively new (under 5 years old). If it's working well and efficient, there's no urgency. But consider switching when it next needs replacing — and keep an eye on the BUS grant, as it won't last forever.
• Your insulation is very poor and you can't afford to improve it. A heat pump in a poorly insulated home will work harder, cost more to run, and may not deliver the savings you expect. Address insulation first.
• You have no suitable outdoor space. Air source heat pumps need an outdoor unit. If you're in an upper-floor flat with no garden or balcony, it may not be practical.
• You're planning to move soon. If you're selling within 2–3 years, you may not recoup the installation cost — though a heat pump can add value to your property and improve its EPC rating.
• The installation requires very extensive work. If your home needs a full radiator replacement, significant insulation upgrades, and electrical work on top of the heat pump installation, the total cost may stretch the payback too far for your budget.

Even in these cases, it's worth getting a free survey and quote. An MCS-certified installer can assess your specific situation and give you exact figures. You might be surprised.

Even if the financial savings are modest for your situation, the environmental benefits are significant. A heat pump in a typical UK home produces around 1 tonne of CO2 per year, compared to 2.7 tonnes for a gas boiler and 4.5 tonnes for an oil boiler.

As the UK electricity grid continues to decarbonise (it's already over 50% renewable), heat pump emissions fall further each year — without you doing anything. By 2035, when the grid is targeted to be fully decarbonised, a heat pump will produce close to zero carbon emissions. A gas boiler will always produce CO2, no matter how green the grid becomes.