Heat Pump vs LPG Cost Comparison UK 2026

If you heat with LPG, you are paying some of the highest energy bills in the country -- and a heat pump could cut those costs substantially. At the October 2026 electricity price cap, a heat pump in a typical 3-bed home is cheaper to run than LPG whenever you pay more than about 56p per litre, and every extra 10p per litre adds around £185 a year to the saving. With the £9,000 BUS grant for off-gas homes replacing LPG (until 31 March 2027), LPG households have one of the strongest financial cases to switch in the UK.

LPG prices have been volatile, delivery charges add up, and there is no Ofgem price cap protecting you the way mains gas customers are protected. This guide compares the full costs of heat pumps versus LPG heating -- from installation to running costs to long-term payback. If you live in a rural area without mains gas, this comparison could change how you heat your home.

For a broader view of all heat pump costs in the UK, start with our main cost guide. This page focuses specifically on the LPG comparison that matters most to off-grid homeowners.

Current LPG Heating Costs in the UK

LPG (liquefied petroleum gas) is delivered by tanker and stored in a tank at your property. It is the most common heating fuel for rural homes not connected to the mains gas network. But it comes at a premium.

LPG Fuel Prices

LPG prices vary by supplier, region, contract and delivery size, and we have not found a reliable current UK average for domestic bulk LPG. Use the price per litre on your last delivery invoice and convert it to a price per kilowatt-hour of heat delivered:

• LPG energy content: approximately 7.11 kWh per litre
• LPG boiler efficiency: 89-92% for a modern condensing model
• Effective cost per kWh of heat: your price per litre ÷ (7.11 × 0.9), so roughly your pence-per-litre figure ÷ 6.4

LPG is usually more expensive per unit of heat than mains gas (capped at 7.97p/kWh for 1 October 2026 to 31 December 2026). And unlike gas, LPG has no regulatory price cap, so prices can spike significantly during cold winters when demand surges.

Typical Annual LPG Heating Bills

For a three-bedroom rural home with an annual heat demand of 12,000 kWh:

• LPG consumption: approximately 1,875 litres per year (at 90% boiler efficiency)
• Annual fuel cost: 1,875 × your price per litre (every 10p per litre is about £185 a year)
• Tank rental (if applicable): £50 to £120 per year
• Annual boiler service: £80 to £120
• Total annual cost: fuel cost plus £80 to £240 for rental and servicing

For a larger four-bedroom detached property (18,000 kWh heat demand), you would burn about 2,810 litres a year, so the annual LPG bill is 2,810 × your price per litre before tank rental and servicing.

Heat Pump Costs for the Same Properties

Installation Costs

Government figures put the median installed price of an air source heat pump at £12,908, with the middle half of installations between £11,128 and £15,627 (DESNZ Boiler Upgrade Scheme statistics, 2026 Q2, before the grant). The Boiler Upgrade Scheme provides £9,000 towards an air-to-water or ground source heat pump that replaces LPG in a home without mains gas (21 July 2026 to 31 March 2027, England and Wales), bringing the net price down significantly:

• Median installation: £12,908 total cost, about £3,900 after the £9,000 grant
• Middle half of installations: about £2,100-£6,600 after the grant; larger homes tend to sit at the upper end

Rural properties often suit heat pumps well. There is usually plenty of outdoor space for the unit, and noise is less of a concern with distant neighbours. The main consideration is ensuring adequate insulation, which some older rural homes may need improving. Check our suitability checker to see how your property stacks up.

Running Costs

Using the same three-bedroom home with 12,000 kWh heat demand, a heat pump with a seasonal COP of 3.0 at the Ofgem price cap electricity rate of 26.32p per kWh (1 October 2026 to 31 December 2026):

• Electricity consumed: 4,000 kWh (12,000 / 3.0)
• Annual electricity cost: about £1,053
• Annual service cost: £100 to £150
• Total annual cost: approximately £1,155 to £1,205

With a time-of-use electricity tariff (an illustrative blended rate of 18p/kWh; check the supplier’s current rates), the electricity cost drops to approximately £720, bringing the total to around £820 to £870.

Head-to-Head Annual Cost Comparison

For a three-bedroom rural home (12,000 kWh heat demand), comparing fuel and electricity only:

• Break-even LPG price (standard tariff): about 56p per litre. Above that, the heat pump is cheaper to run
• Annual saving: about £185 for every 10p per litre you pay above 56p, plus about £330 more on an illustrative 18p/kWh time-of-use tariff

For a four-bedroom detached (18,000 kWh heat demand), the heat pump uses about 6,000 kWh (about £1,580 a year at 26.32p/kWh):

• Break-even LPG price (standard tariff): again about 56p per litre
• Annual saving: about £280 for every 10p per litre you pay above that, more on a time-of-use tariff

If you also generate electricity with solar panels, a proportion of the heat pump's consumption costs nothing at all, pushing savings even higher.

Payback Period Analysis

The payback period depends on your net installation cost after the BUS grant, the LPG boiler you would otherwise have to buy, and your annual savings, which depend on your LPG price. Payback (years) = (net installation cost − cost of a replacement LPG boiler) ÷ annual saving.

With the £9,000 grant, the net cost of a median installation is close to the price of a new LPG boiler, so payback can be short if your LPG price is well above break-even. These calculations use October 2026 electricity prices -- if LPG prices rise or electricity levies are rebalanced (as the government has indicated), the payback shortens considerably.

Use our heat pump calculator to get a payback estimate specific to your property and current fuel costs.

Beyond the Numbers: Why LPG Users Should Consider Switching

Price Stability

LPG prices fluctuate with global oil markets and have no regulatory price cap. Electricity prices, while not immune to volatility, are regulated by Ofgem and increasingly influenced by domestic renewable generation. Switching to a heat pump gives you more predictable heating costs.

No More Deliveries

Running out of LPG in January is a genuine risk for some rural homeowners. Heat pumps run on electricity from the grid -- always available, always on. No more scheduling deliveries, worrying about access for the tanker, or paying premium rates for emergency top-ups.

Tank Removal

Once you switch, the LPG tank can be removed (your supplier will collect it if it is rented). This frees up garden space and removes the associated safety considerations of storing pressurised gas on your property.

Property Value

Moving away from LPG typically improves your EPC rating, which can positively impact property value. Buyers increasingly view LPG dependency as a negative, whilst a modern heat pump is seen as a future-proofed solution. Read more in our guide to whether heat pumps are worth it.

Practical Considerations for LPG-to-Heat-Pump Switches

Radiator Upgrades

Many rural properties with LPG boilers have standard radiators sized for high flow temperatures (70-80°C). Heat pumps work most efficiently at lower flow temperatures (35-45°C), so some radiators may need upsizing. An installer will calculate the heat loss for each room and determine whether existing radiators are adequate. See our guide on whether you need new radiators for a heat pump.

Hot Water Cylinder

If your LPG system has an existing hot water cylinder, it may be reusable with the heat pump. If you currently have a combi boiler setup, you will need a new cylinder installed, which adds to the cost but is included in most installer quotes.

Insulation

Rural properties -- particularly older stone cottages and farmhouses -- can have poor insulation. Improving insulation before or alongside a heat pump installation reduces the size of system needed, lowers running costs, and improves comfort. Loft insulation, cavity wall insulation (where applicable), and draught-proofing are the most cost-effective measures.

Planning Permission

Air source heat pumps generally fall under permitted development rights in England, where the old 1 metre boundary rule was removed on 29 May 2025. Wales has its own rules, so check with your local planning authority in Wales; Scotland differs too. However, properties in conservation areas, listed buildings, or those in national parks may need planning permission. Our installation guide covers the full planning process.

Pairing a heat pump with solar panels for your rural home can offset a significant chunk of the electricity cost, making the economics even more attractive for off-grid properties.

What About Hybrid Systems?

Some LPG users consider a hybrid system -- keeping the LPG boiler as backup while installing a heat pump for most of the year's heating. This can work, but for LPG users the economics are less compelling than for mains gas users. The high cost of LPG means you save more by replacing it entirely than by keeping it as a backup.

A full heat pump replacement, combined with good insulation and correctly sized radiators, can handle even the coldest UK days. The hybrid approach adds complexity and maintenance cost for a backup you should rarely need. For a more detailed comparison of running costs across all fuel types, see our running costs guide.

Frequently Asked Questions

Can a heat pump heat a rural home as effectively as LPG?

Yes, provided the system is correctly sized and the property is reasonably insulated. Modern air source heat pumps operate efficiently down to outdoor temperatures of -20°C or below. The UK rarely experiences temperatures below -10°C, even in northern Scotland. A properly specified system will keep your home comfortable year-round.

What happens to my LPG tank when I switch?

If the tank is rented from your supplier (which is most common), they will arrange collection at no charge. If you own the tank, you can have it decommissioned and removed by a qualified engineer, or sell it. Most suppliers require a notice period, so check your contract terms before switching.

Is the BUS grant available for homes currently using LPG?

Yes. The Boiler Upgrade Scheme is available for properties replacing fossil fuel heating, including LPG boilers. If your home has no mains gas connection and you replace LPG with an air-to-water or ground source heat pump, the grant is £9,000 (21 July 2026 to 31 March 2027, England and Wales); otherwise it is £7,500. You must use an MCS-certified installer, who applies for the grant and confirms eligibility. GOV.UK does not list an EPC or outstanding insulation recommendations as eligibility conditions.

Will I need three-phase electricity for a heat pump?

Most domestic heat pumps up to about 14kW operate on single-phase electricity, which is standard in UK homes. Larger systems (typically for bigger properties needing 16kW+) may require three-phase supply. Your installer will advise during the survey.

How do heat pump running costs compare if LPG prices rise?

A three-bedroom home burns about 1,875 litres of LPG a year, so every 10p per litre rise adds roughly £185 a year to the LPG bill and to the saving from a heat pump. Every price increase for LPG strengthens the case for switching.

Can I get the heat pump installed before the LPG contract ends?

Yes. Most LPG contracts allow you to stop ordering fuel at any time -- the contract typically relates to the tank, not the fuel. You can have the heat pump installed and switch over immediately, then arrange tank removal. Check your specific contract for any early termination clauses on tank rental.