Quick Answer
Typical UK heat pump running costs: £800-£1,400/year (3-bed home, well-insulated). Actual cost depends on: electricity tariff (24-30p/kWh), SCOP rating (3.0-4.5), and home insulation. With Octopus Cosy tariff (15p/kWh off-peak), costs can drop to £600-£900/year.
| Home Type | SCOP Rating | Tariff | Annual Cost |
|---|---|---|---|
| 3-bed semi, EPC C | 3.5 | Standard (27p/kWh) | £1,230/year |
| 3-bed semi, EPC C | 3.5 | Octopus Cosy (15p off-peak) | £740/year |
| 4-bed detached, EPC B | 4.0 | Standard (27p/kWh) | £1,080/year |
| 2-bed terrace, EPC C | 3.2 | Standard (27p/kWh) | £860/year |
| 3-bed semi, EPC D | 3.0 | Standard (27p/kWh) | £1,620/year |
💡 Key Insight
The difference between standard tariff and heat pump tariff can save you £400-£600/year. Octopus Cosy, OVO Heat Pump, and British Gas Heat Pump tariffs offer 15-17p/kWh during off-peak hours (typically midnight-7am).
| Scenario | Heat Pump Cost | Gas Boiler Cost | Difference |
|---|---|---|---|
| 3-bed, standard tariff | £1,230/year | £1,050/year | +£180/year |
| 3-bed, heat pump tariff | £740/year | £1,050/year | -£310/year savings |
| 4-bed, heat pump tariff + solar | £500/year | £1,380/year | -£880/year savings |
Bottom line: On standard electricity tariff, heat pumps cost slightly more to run than gas boilers (£50-£200/year). But switch to a heat pump tariff and you save £200-£400/year. Add solar panels and savings jump to £600-£900/year.
Annual Cost = (Annual Heat Demand ÷ SCOP) × Electricity PriceSCOP (Seasonal Coefficient of Performance) tells you heat pump efficiency. Higher = lower running costs.
Every 0.5 SCOP improvement = ~£150/year savings on a typical 3-bed home.
Better insulation = less heat needed = lower costs.
Upgrading from EPC D to C (loft + wall insulation) can save £300-£600/year.
Lower flow temperature = higher efficiency = lower costs.
Reducing flow temp from 55°C to 50°C can save £100-£200/year.
Heat pumps also provide hot water (via tank). This adds to running costs.
Schedule hot water heating during off-peak hours to minimize costs.
❌ Myth: "Heat pumps are always expensive to run"
Reality: On heat pump tariff (15-17p/kWh off-peak), they're cheaper than gas boilers. On standard tariff (27p/kWh), they cost £50-£200/year more. The tariff matters more than the technology.
❌ Myth: "You need to leave heat pumps on 24/7"
Reality: You can turn them off, but constant low temperature (19-21°C) is more efficient than on/off cycling. Think "low and slow" not "blast and stop."
❌ Myth: "Heat pumps cost £3,000/year to run"
Reality: That's outdated data from poorly-installed systems (2010s). Modern MCS-certified heat pumps with proper sizing cost £700-£1,400/year (typical 3-bed home).
Running costs vary based on your home size, insulation, and electricity tariff. Our calculator uses your postcode to estimate:
Typical UK heat pump running costs (2026):
Compared to gas boiler:
The key to low heat pump running costs: switch to a heat pump electricity tariff (Octopus Cosy, OVO, British Gas), ensure proper installation (correct sizing + flow temp), and improve home insulation where needed.