Heat Pump Running Costs UK 2026: What to Expect
Heat pump running costs depend on your home’s heat demand, your electricity tariff, and the heat pump’s real-world efficiency. A well-designed system running at low temperatures in an insulated home can be cost-competitive, while a poorly designed or oversized system can be expensive. This guide explains what affects running costs in the UK and how to reduce bills in 2026.
What Drives Heat Pump Running Costs?
- Heat demand: insulation, draughts, size, and set temperatures.
- SCOP/efficiency: how much heat you get per unit of electricity over a season.
- Flow temperature: higher temperatures usually reduce efficiency.
- Tariff: unit rate and any time-of-use options.
Heat Pump vs Gas Boiler: Running Cost Comparison
A direct comparison depends on electricity and gas prices and the effective efficiency of each system. A modern condensing boiler can be efficient, but a well-run heat pump can deliver multiple units of heat per unit of electricity.
How to Reduce Heat Pump Bills
- Improve insulation and draught proofing first.
- Run lower flow temperatures where possible.
- Use sensible schedules and avoid rapid temperature swings.
- Maintain the system (filters, airflow, defrost performance).
Still Choosing Heating? Start With Output
Whether you choose a boiler or heat pump, correct sizing is crucial. Use our calculator to estimate the kW output your home needs.
Use the Boiler Size CalculatorFrequently Asked Questions
Are heat pumps cheaper to run than gas boilers?
Sometimes. It depends on electricity vs gas prices, and the heat pump’s seasonal efficiency in your home.
What is SCOP and why does it matter?
SCOP reflects seasonal efficiency. Higher SCOP generally means lower running costs for the same heat demand.
Does underfloor heating reduce running costs?
It can because it often works at lower flow temperatures, which helps heat pump efficiency.
Will a bigger heat pump cost more to run?
Oversizing can lead to inefficient cycling. Correct design and controls matter as much as headline size.
How can I lower my heat pump bills quickly?
Reduce heat demand (insulation/draughts), keep flow temperatures sensible, and use stable setpoints rather than big swings.