Heat Pump Running Cost Calculator
Use our free calculator to compare the estimated running cost of a heat pump with your current heating system.
Adjust your annual energy use, heat pump efficiency, electricity tariff and even add solar panels or a battery to see how your running costs could change.
No email address. No assumptions you can’t change. Just a simple way to explore the numbers.
How the calculator works
There isn’t one answer to the question, "How much does a heat pump cost to run?"
It depends on your home, your heating system and how you use energy.
This calculator lets you explore different scenarios using your own assumptions. As you make changes, your estimated annual running costs update instantly so you can see which factors have the biggest impact.
It’s designed to help you understand the numbers before committing to a full heat pump design.
What you can change
One of the biggest problems with online calculators is that they make lots of assumptions for you.
We’ve done the opposite.
You can adjust the things that really affect running costs, including:
Your annual heating demand
The amount of heat your home needs each year has the biggest influence on running costs. If you already know your annual heating demand, you can enter it directly.
Heat pump efficiency
A more efficient heat pump uses less electricity to produce the same amount of heat.
Use the slider to explore different Seasonal Performance Factors (SPF) and see how efficiency changes your annual running costs.
Your energy prices
Compare standard tariffs with cheaper off-peak rates and see how your choice of tariff affects the cost of running a heat pump.
Solar and battery
If you already generate your own electricity and store it (or thinking about it), your heat pump may be able to use some of that energy instead of importing it from the grid. The calculator estimates how this could reduce your running costs.
Why every home is different
The running cost of a heat pump isn’t determined by the heat pump alone.
A well-designed system in a well-insulated home can be extremely efficient. The same heat pump installed in a different property may produce very different results.
Running costs are influenced by factors such as:
The heat loss of your home
Your heating and hot water demand
Your electricity tariff
Outdoor temperatures
Solar generation and battery storage
How the system has been designed, installed and commissioned
Why homeowners choose dwellow
Straightforward advice, quality installations, and no pressure to decide
Clear estimates
Upfront heat pump estimates, tailored to your home and heating needs. Not guesswork.
Done properly
Heat pump installations designed and installed by certified engineers who know what they’re doing.
No pressure
We won’t push a heat pump if it’s not right, or upsell things you don’t need.
Real people
A friendly, knowledgeable team you can talk to whenever you need clarity or reassurance.
End to end support
From first estimate to installation and beyond, we guide you through the whole journey.
Frequently asked questions
Often, yes, but not always. The answer depends on your home’s heat demand, the efficiency of the heat pump, electricity prices and how well the system has been designed, installed and commissioned.
SCOP stands for Seasonal Coefficient of Performance, or sometimes known as Seasonal Performance Factor. A heat pump with a SCOP of 4 produces around 4 kWh of heat for every 1 kWh of electricity it uses over a typical heating season. Higher SCOP values generally mean lower running costs.
Yes. If your heat pump can use electricity generated by your solar panels, you’ll import less electricity from the grid. Battery storage can increase these savings by storing cheap or surplus electricity for later use.
No. The calculator estimates running costs. It doesn’t assess whether a heat pump is suitable for your home or replace a professional heat loss calculation and system design.
Yes. You can use the calculator as many times as you like and explore different scenarios without creating an account.
