How much does a heat pump cost to run in 2026? Real data from UK households

How much does a heat pump cost to run in 2026? Real data from UK households The honest answer: somewhere between £500 and £1,400 a year for most UK homes — but the range is enormous, and where you land inside it has very little to do with your heat pump and almost everything to do with three things: how much heat your home needs, how efficiently your pump turns electricity into that heat, and which electricity tariff you're on. This guide breaks down the real numbers for 2026 using current Ofgem price cap rates and published supplier tariffs. We'll model three real-world household profiles, show what each pays on five different tariffs, and give you a five-minute method to estimate your own cost. If you've already chosen your home and want to know which tariff wins, our data-driven comparison of the best heat pump tariffs for 2026 covers that in detail. Want to skip the averages and see your own number? You can register for a free account, upload your smart meter data, and compare every tariff against your real consumption. The simple formula behind every heat pump bill Every heat pump running cost comes down to one equation: Annual cost = (heat your home needs ÷ your pump's efficiency) × your electricity rate + standing charge In plain English: your home needs a certain amount of heat each year (measured in kWh). Your heat pump produces that heat using a fraction of that much electricity — because it moves heat from the outside air rather than burning fuel. The ratio between heat out and electricity in is the pump's efficiency, called the SCOP (Seasonal Coefficient of Performance). Then you multiply the electricity used by your tariff rate and add the daily standing charge. So a home needing 12,000 kWh of heat, with a pump running at a SCOP of 3.0, uses 4,000 kWh of electricity a year. At the April–June 2026 Ofgem price cap rate of 24.67p/kWh, that's roughly £987 in unit costs, plus around £209 a year in standing charges. Three numbers move that total. Let's take them one at a time. What "average" actually means: three real households There is no single "average" heat pump home, which is exactly why headline figures are so misleading. UK homes typically need anywhere from 8,000 to 17,000 kWh of heat per year depending on size, age and insulation. Here are three realistic profiles. Household Property Annual heat demand SCOP Electricity used Small Well-insulated 2-bed flat or terrace ~6,000 kWh 3.5 ~1,700 kWh Medium 3-bed semi, decent insulation ~12,000 kWh 3.2 ~3,750 kWh Large 4-bed detached, older, solid walls ~18,000 kWh 2.7 ~6,700 kWh Two things jump out. First, the large home doesn't just need three times more heat than the small one — it also runs at a lower efficiency, because older homes need higher flow temperatures and that drags the SCOP down. The gap in electricity used is wider than the gap in heat demand. Second, these are heat figures only. Your heat pump's electricity is on top of the 2,000–3,000 kWh a typical home already uses for everything else. Worked examples: what each home pays on five tariffs Here's the part that matters. The same three households, on five different 2026 tariffs. The standard variable (Ofgem cap) column is the "do nothing" baseline. The others assume the household can shift a realistic share of its heating load into cheap windows — roughly 50% for the time-of-use tariffs, which is achievable with a hot water cylinder and a sensible heating schedule. Tariff Small (~1,700 kWh) Medium (~3,750 kWh) Large (~6,700 kWh) Standard variable (Ofgem cap) ~£629 ~£1,134 ~£1,862 Cosy Octopus ~£480 ~£815 ~£1,310 Intelligent Octopus Go ~£455 ~£790 ~£1,290 EDF Heat Pump Tracker ~£500 ~£860 ~£1,400 E.ON Next Pumped ~£520 ~£900 ~£1,470 All figures include the standing charge (~57p/day, ~£209/year) and are national-average estimates based on published May 2026 tariff rates. Your actual cost depends on your DNO region, payment method, how much load you can genuinely shift, and any supplier price changes since publication. The headline is stark: the medium household saves roughly £320–£340 a year simply by moving from the standard cap to a heat-pump-optimised tariff — without changing a single thing about their home or their pump. For the large household, the saving is over £450 a year. That is the single highest-leverage decision a heat pump owner can make. → See Octopus's heat pump tariffs (referral link — supports this site) → See EDF's Heat Pump Tracker (referral link) The efficiency question: why SCOP 3.5 vs 2.8 is worth £200 a year SCOP is the most underrated number in the whole calculation. Real-world seasonal efficiency for a well-installed UK heat pump typically lands between 2.5 and 3.5. A poorly installed system, or one forced to run at high flow temperatures because the radiators are too small, can drop to 2.0–2.2 — the point at which it stops being cheaper than gas. Take the medium household needing 12,000 kWh of heat. At a SCOP of 3.5 it uses 3,430 kWh of electricity; at 2.8 it uses 4,290 kWh. That 860 kWh difference is worth about £210 a year at cap rates — every year, for the life of the system. The things that move SCOP are almost all fixable: lower flow temperatures, larger radiators, correct sizing, and weather compensation set up properly at install. It's worth far more than most people realise. Cold weather matters too, but less than the headlines suggest. Efficiency does fall on the coldest days, but those days are a small slice of the year. What counts is the seasonal average, not the worst week in January. Standing charges: the invisible £200 a year Before you've used a single unit of electricity, you're paying around 57p a day just to be connected — roughly £209 a year under the Q2 2026 cap. This is the same whether you use the heat pump heavily or barely at all, which means it weighs proportionally heavier on the small, efficient home than the large one. Standing charges also vary significantly by DNO region — there are 14 across the UK, and the gap between the cheapest and most expensive can be 15–20p a day. It's one of the reasons two identical homes in different parts of the country can see meaningfully different bills, and it's built into every regional comparison we run. The costs people forget The unit rate and standing charge are the bulk of it, but a complete picture includes a few extras: Annual service — budget around £150 a year for a maintenance visit. Most manufacturer warranties require it. Occasional refrigerant or component work — uncommon in the first decade, but the circulating pump and expansion vessel are wear items that may eventually need replacing. Immersion backup — most systems have a backup electric immersion heater. If it kicks in often (a sign of an undersized system or a fault), it runs at 100% electricity with no efficiency multiplier, and it's expensive. Worth watching. None of these are large, but they're real, and they're missing from most "running cost" headlines. How to estimate your own running cost in five minutes You don't need to model anything. Two quick methods: From your bills: Find your annual electricity use in kWh (it's on your annual statement). Subtract the roughly 2,500 kWh a typical home uses for non-heating. Multiply what's left by your unit rate. That's your heat pump's annual electricity cost. Add your standing charge. From your smart meter: This is far more accurate, because it captures exactly when you use electricity — which is the whole game on a time-of-use tariff. If you register for a free account and upload your half-hourly smart meter data, the platform will run your real consumption against every tariff and tell you precisely what each would cost you, region included. No estimates, no averages — your actual numbers. Frequently asked questions Is a heat pump cheaper to run than a gas boiler? For a well-installed system on a heat-pump-optimised tariff, usually yes — though by a narrower margin than people expect. The advantage comes from efficiency: a heat pump delivers three or more units of heat per unit of electricity, which offsets electricity costing roughly four times more than gas per unit. On the wrong tariff or with a poor install, the advantage can disappear. How much does a heat pump cost to run per month? For the medium household above, roughly £65–£95 a month on an optimised tariff, but heavily weighted toward winter. Expect summer months (hot water only) to be a fraction of peak winter months. Does cold weather make heat pumps expensive? Efficiency dips on the coldest days, but those days are a small part of the year. The seasonal average is what determines your bill, and a properly set up system handles UK winters fine. What's a good SCOP to aim for? 3.0 or above for a well-designed system; 3.5+ is excellent. Below 2.5 suggests something is worth investigating — usually flow temperature or radiator sizing. The bottom line A heat pump's running cost isn't a fixed number — it's the product of your home's heat demand, your system's efficiency, and your tariff. You can't easily change the first, you can improve the second over time, but you can change the third today, and it's worth hundreds of pounds a year. The fastest way to see your real numbers is to create a free account and upload your smart meter data — we'll compare every UK heat pump tariff against your actual consumption and show you exactly where you stand.