Switching from Oil to Heat Pump UK (2026 Guide)
Last updated: June 2026
If you currently heat your home with oil, switching to a heat pump could reduce your reliance on delivered fuel, improve efficiency and make running costs more predictable. This guide explains costs, savings, suitability, radiator changes and the new £9,000 grant for eligible oil-heated homes.
• Independent UK heat pump researcher
• Reviewed for accuracy
Quick Answer: Is It Worth Switching from Oil to a Heat Pump?
For many UK homes that are off the gas grid, switching from oil heating to a heat pump can make sense. Oil prices can fluctuate heavily, while a well-designed heat pump can offer higher efficiency, more predictable running costs and lower carbon emissions.
The case is usually strongest when the home is reasonably well insulated, has suitable radiators or underfloor heating, and can run at lower flow temperatures.
From 21 July 2026 to 31 March 2027, eligible off-gas-grid homes in England and Wales that currently use heating oil can qualify for a higher £9,000 Boiler Upgrade Scheme grant towards an air source or ground source heat pump.
Key point for oil-heated homes
The new £9,000 grant could make oil-to-heat-pump conversions more attractive, but the system still needs to be designed properly. Radiator sizing, insulation, controls and flow temperature all affect whether the heat pump performs well.
New £9,000 Grant for Oil-Heated Homes
If your home currently runs on heating oil, the upfront cost of switching to a heat pump may be lower than before.
The standard Boiler Upgrade Scheme grant for many eligible air-to-water heat pump installations is £7,500. However, from 21 July 2026 to 31 March 2027, eligible off-gas-grid properties replacing heating oil can get a higher £9,000 grant.
This uplift is aimed at homes and small businesses that are not connected to the gas grid and currently rely on oil or LPG heating.
Standard heat pump grant
Many eligible homes in England and Wales can get £7,500 towards an air-to-water air source heat pump or ground source heat pump.
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Oil/LPG uplift
Eligible off-gas-grid homes replacing oil or LPG can get £9,000 during the temporary uplift period.
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For a full breakdown of current grant rules, see our Heat Pump Grants UK guide.
Is a Heat Pump a Good Alternative to Oil Heating?
For UK homes not connected to mains gas, oil heating has traditionally been one of the most common options. However, fuel deliveries, changing oil prices and boiler efficiency can make long-term costs harder to predict.
A heat pump can be a strong alternative because it uses electricity to move heat rather than burning fuel directly. In the right home, this can mean significantly better efficiency and more stable running costs.
If your home uses LPG rather than oil, read our guide to replacing an LPG boiler with a heat pump.
Why oil homes can suit heat pumps
Homes currently using oil are often already used to higher or less predictable heating costs. That can make the efficiency benefits of a well-designed heat pump more noticeable than in a home switching from mains gas.
Oil vs Heat Pump Running Costs
Oil prices can fluctuate depending on fuel markets and delivery costs, while electricity tariffs are usually easier to compare. A heat pump also uses energy differently because it can deliver several units of heat for every unit of electricity used.
Oil Heating
- Highly dependent on fuel price changes
- Requires oil deliveries and storage
- Can be expensive in larger or older homes
- Efficiency depends on boiler age and condition
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Heat Pump
- Much higher efficiency when designed well
- No oil tank or fuel deliveries
- More predictable electricity-based running costs
- Performance depends on flow temperature and setup
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The final comparison depends on oil price, electricity tariff, insulation, radiator sizing and how efficiently the heat pump runs. For a full breakdown, see our Heat Pump Running Costs UK guide.
How Much Does It Cost to Switch from Oil to a Heat Pump?
A typical air source heat pump installation often costs around £8,000 to £15,000 before grants, although larger or more complex oil-heated homes can cost more.
Oil-heated homes are often rural, detached or older properties, so the final quote may depend heavily on heat loss, radiator sizes, pipework, hot water setup and access around the property.
With the temporary £9,000 oil/LPG grant uplift, an eligible £13,500 installation could fall to around £4,500 before non-eligible extras. A £15,000 installation could fall to around £6,000.
What Needs to Change When Switching from Oil?
Switching from oil to a heat pump is not always a simple boiler swap. The heating system needs to be designed around lower flow temperatures and steady operation.
Radiators
Heat pumps operate at lower temperatures than oil boilers. This means some homes may need larger radiators or system adjustments so rooms can stay warm without forcing the heat pump to run too hot. See our guide on whether you need new radiators for a heat pump.
Hot water system
Many oil systems already use a hot water cylinder, which can make switching simpler than replacing a combi boiler. However, the cylinder still needs to be suitable for the heat pump setup.
Controls and thermostats
Heat pumps usually work best with steady, consistent control rather than aggressive on/off schedules. The right smart thermostat for a heat pump can help improve usability, scheduling and comfort.
Zoning for larger homes
Many oil-heated homes are larger rural properties. In these cases, smart TRVs for heat pumps can help manage room-by-room comfort, especially where some rooms overheat while others take longer to warm up.
Best Heat Pumps for Oil-Heated Homes
Not all heat pumps are equally suited to larger, older or rural homes. When switching from oil, the system may need to handle higher heat demand, larger hot water usage and a wider range of room sizes.
The best choice is not always the most powerful unit. It should be matched to the home’s heat loss, radiator output, noise requirements and available outdoor space.
See our guide to the best air source heat pumps UK to compare suitable systems.
How to Maximise Savings After Switching
Once installed, the biggest savings usually come from how the system is designed, commissioned and used day to day.
- Keep flow temperatures as low as practical while maintaining comfort.
- Use a smart thermostat for steady, sensible control.
- Avoid frequent on/off cycling where possible.
- Keep room temperatures consistent rather than repeatedly boosting.
- Improve insulation and reduce draughts where practical.
- Use smart TRVs carefully in larger homes where room-by-room control matters.
- Track electricity use so you can spot inefficient patterns early.
Accessories such as energy monitors, smart plugs and temperature sensors can help you understand how your system is performing. See our Heat Pump Accessories guide.
Oil Tank Removal and Practical Considerations
Switching away from oil may also involve practical changes around the property. You may no longer need the oil tank, oil deliveries or boiler flue, but removal and making-good work may not always be included in a standard heat pump quote.
Before agreeing to a quote, check whether it includes:
- Decommissioning the existing oil boiler
- Oil tank removal or isolation
- Making good around the old boiler location
- Hot water cylinder checks or replacement
- Electrical work for the outdoor unit
- Controls, commissioning and user handover
This is one reason it is important to compare the full scope of each quote, not just the headline price after grant.
Is It Worth Switching from Oil to a Heat Pump?
For many UK homes, especially those off the gas grid, switching from oil to a heat pump can be one of the stronger heat pump use cases.
It is more likely to be worth considering if:
- Your home is reasonably well insulated.
- Your radiators can work at lower flow temperatures or can be upgraded.
- You want to reduce reliance on oil deliveries and oil price changes.
- You qualify for the standard Boiler Upgrade Scheme or the £9,000 oil/LPG uplift.
- You are willing to run the heating differently from a traditional oil boiler.
If you are still weighing up the decision, read our full guide on whether heat pumps are worth it.
Frequently Asked Questions
Can I replace an oil boiler with a heat pump?
Yes, many oil boilers can be replaced with a heat pump, but the home needs to be assessed properly. Radiators, insulation, hot water setup, outdoor space and flow temperature all affect suitability.
How much is the grant for oil-heated homes?
From 21 July 2026 to 31 March 2027, eligible off-gas-grid homes in England and Wales that currently use heating oil can get a £9,000 Boiler Upgrade Scheme grant towards an air source or ground source heat pump.
Is a heat pump cheaper to run than oil heating?
It can be, especially in a well-insulated home with a properly designed system. The comparison depends on oil price, electricity tariff, heat pump efficiency, flow temperature and how the heating is used.
Will I need new radiators?
Some oil-heated homes need larger radiators because heat pumps work best at lower flow temperatures. Others may only need a few upgrades depending on heat loss and radiator output.
Do I still need an oil tank?
No, not once the oil system is fully replaced. However, tank removal or decommissioning may not always be included in the standard heat pump installation quote, so check this with the installer.
Are oil-heated homes good candidates for heat pumps?
They can be. Off-grid oil-heated homes often have a stronger financial case than homes replacing mains gas, especially when the home is suitable and the higher £9,000 grant applies.
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Sources & Further Reading
This guide uses official and independent sources for Boiler Upgrade Scheme grant amounts, oil/LPG grant changes, heat pump costs and system suitability.
Related Guides
Next Step
If you currently use oil heating, the next step is checking the grant rules and comparing the full installation cost against likely running costs.