No, Your Heat Pump Won't Save You Money on Day One — And That's Fine

I've been fitting heat pumps in west London since 1989, and the question I get asked most often is still the one that tells me we've got a communication problem in this industry: "How much will I save on my energy bills?"

The answer people want to hear is "loads, immediately." The answer I actually give them is "it's a longer term commitment."

Let me be blunt: you're not saving money on day one. You're probably not even saving money in year one. A heat pump is a capital investment that pays back over time — five years, ten years, sometimes longer depending on what you're replacing and how your house performs.

If an installer is promising you instant savings, they're either overselling or they've not done the maths properly. I've watched too many cowboys quote fictitious numbers just to get the signature, and then homeowners end up disappointed when their first winter bill arrives.

Here's what actually happens: you spend £10,000–£15,000 (sometimes more for a complex job) to replace a boiler that might've cost you £2,000–£3,000. Yes, you get the £7,500 BUS grant. Yes, your running costs should drop if you're replacing oil, LPG, or old electric storage heaters. But if you're coming from mains gas in a half-decent modern boiler, your operating costs might actually stay similar or even tick up slightly — especially if your radiators need upgrading or your house isn't well insulated.

The value proposition isn't "free money now." It's decarbonisation, future-proofing, and gradually clawing back that upfront cost over the system's 20+ year lifespan.

Case in point: we did a job recently at Buckingham Palace. Lovely people, they make great tea. Even they understood this wasn't about slashing bills tomorrow — it was about doing the right thing for the long haul and getting ahead of the gas boiler ban.

So if you're getting heat pump quotes right now, ask yourself: are you doing this to cut your bills by half next winter, or are you doing this because you want low-carbon heating that'll still be running brilliantly in 2045? If it's the former, pump the brakes and spend that money on insulation first. If it's the latter, crack on — but go in with realistic expectations.

The other thing I see installers get wrong is quoting too high without ever actually sitting down with the client. They'll fire off a number based on a postcode and a Google Street View screenshot, no conversation, no relationship. Then they wonder why the customer ghosts them.

You need to get to know people. What do they actually care about? Are they lifelong environmentalists or just sick of their oil tank? Do they work from home and need the system silent, or are they out all day and just want low bills? A heat pump isn't an off-the-shelf product — it's a bespoke retrofit that only works properly when the installer understands the house and the humans living in it.

I've been doing this for 35 years across west London and Acton, and the jobs I'm proudest of aren't the biggest or flashiest. They're the ones where the homeowner rings me up two winters later and says, "You told me it'd take time, and you were right — but now I'm paying £600 less a year than my neighbour, and my house is warm all the time."

That's the win. Not day one. Year three.

So if you're thinking about a heat pump: brilliant, do it. Just don't expect magic. Expect physics, patience, and a heating system that'll outlast the next three governments.