Winter 2026: Which Heating Fuel Offers Real Savings Right Now?
With heating oil at 106.7p/L and electricity at 24.5p/kWh, the gap between fuels is widening. Here's how to pick the cheapest option for your home.
As winter sets in, UK homeowners face a critical choice: which heating fuel will actually save you money over the next three months? Current pricing reveals stark differences between the main options available to British households.
The Price Picture Right Now
Today's rates tell a clear story:
- Heating oil: 106.7p/litre (ex. VAT)
- Mains gas: 6.04p/kWh (Ofgem cap)
- Electricity: 24.5p/kWh (Ofgem cap)
- Wood pellets: 7.2p/kWh
But pence per unit doesn't tell the whole story. You need to compare actual cost per unit of heat delivered — which depends on your boiler's efficiency and heating system type.
What These Numbers Really Mean
Gas remains the cheapest per kilowatt-hour, but only if you have a modern condensing boiler (90%+ efficiency). Older systems waste significant heat. If you're burning gas inefficiently, your real cost climbs fast.
Heating oil sits in the middle, but the headline price masks a crucial fact: oil boilers must be serviced annually and are less efficient than modern gas. You're also exposed to price volatility when you refill. If you use oil, compare current heating oil prices to lock in rates before winter demand peaks.
Electricity at 24.5p/kWh looks expensive — and it is for traditional storage heaters. However, if you're using a modern air-source heat pump, the real cost per unit of heat is much lower due to high efficiency ratios (typically 3:1 or better). Compare electricity rates if you have a heat pump installed.
Wood pellets at 7.2p/kWh offer competitive pricing for those with biomass boilers, though supply chains and storage space limit access for most UK homes.
Your Action: Calculate Your True Heating Cost
Stop comparing pence per unit. Instead:
1. Find your boiler's efficiency rating — check your installation certificate or call your installer
2. Divide the fuel price by efficiency % — this gives your real cost per unit of useful heat
3. Multiply by your estimated winter usage (typically 12,000–20,000 kWh depending on home size and insulation)
4. Compare across fuels using this calculation, not raw headline rates
For example: heating oil at 106.7p/L in an 85% efficient boiler costs roughly 12.5p per kWh of heat delivered — outperforming electricity but trailing modern gas systems.
The Efficiency Angle
Before switching fuels, ask yourself: Is my current system running efficiently? A poorly maintained boiler, leaky radiators, or uninsulated lofts waste money regardless of fuel price. Fixing these issues delivers immediate returns.
Compare mains gas rates if you're unsure whether you're on the best deal, and consider a professional heating audit — many local authorities still offer subsidised checks.
Winter pricing is set. Your heating efficiency isn't.