Cut your
winter bills.
The average UK household spends around £800–£1,000 on energy between October and March. That's roughly double the summer half. But winter bills aren't fixed — there are real, measurable ways to bring them down, from quick behaviour changes to upgrades that pay back within a year.
Where the money goes: heating (gas or electric) accounts for about 60% of a typical winter bill. Hot water is 15–20%. Lighting and appliances make up the rest. The biggest savings come from heating less space, heating it less often, and losing less heat through the fabric of your home.
1. Switch tariff
This is often the single biggest saving available, and it takes 10 minutes. If you've never switched, or you've been on the same deal for more than a year, you're almost certainly paying more than you need to.
Fixed vs variable: the Ofgem price cap sets the maximum for variable (default) tariffs. Fixed deals can be cheaper or more expensive depending on the market — compare both. Fixed deals protect you from price rises but can cost more if prices fall.
Time-of-use tariffs: if you have a smart meter, tariffs like Octopus Go, Cosy, or Intelligent offer cheap off-peak electricity (as low as 7p/kWh vs 24p standard). If you can shift heating, hot water, or EV charging to off-peak hours, the savings are substantial. Our tariff comparison calculator models this for your usage pattern.
Dual fuel vs separate: dual fuel used to guarantee a discount but doesn't always now. Compare both options — sometimes separate gas and electricity suppliers win.
2. Insulate
Insulation is the single best long-term investment for reducing heating bills. It works every winter, forever, with no ongoing cost.
Loft insulation
If your loft has less than 270mm of insulation, topping it up saves £150–£250/year for a typical semi-detached house. DIY cost: £200–£400. Professional installation: £400–£700. Payback: 1–3 years. Use our insulation calculator for your specific home.
Cavity wall insulation
If your home was built between the 1920s and 1990s and has unfilled cavity walls, filling them saves £150–£300/year. Professional-only job: £500–£1,500 depending on property size. Payback: 2–5 years. Check whether your walls are cavity by looking at the brick pattern — if all bricks are the same length (stretcher bond), it's almost certainly cavity.
Draught-proofing
The cheapest form of insulation. Sealing gaps around doors, windows, letterboxes, and where pipes enter walls costs under £50 in materials and saves £60–£90/year. See our keeping warm for less guide for the full approach.
3. Heat smarter
Turn your thermostat down
Every degree you reduce saves roughly 10% on heating. Going from 21°C to 19°C is worth £150–£200/year for an average gas-heated home. Most people adapt within a few days.
Heat only the rooms you use
Turn radiator valves down in rooms you don't use regularly — spare bedrooms, dining rooms, utility rooms. Keep doors closed to those rooms. If you have TRVs, set unused rooms to 1 (frost protection). If you don't, fitting TRVs costs £5–£10 per radiator and lets you zone your heating without a plumber.
Programme your heating properly
Set heating to come on 30 minutes before you need it and off 30 minutes before you leave. If you're out all day, don't heat an empty house. The idea that "it's cheaper to leave the heating on low all day" is a persistent myth — the Energy Saving Trust has tested it and it's not true. You use less energy by heating your home only when you're in it.
4. Get help that's available to you
Warm Home Discount
A £150 one-off discount on your electricity bill, applied automatically for most eligible customers. You typically qualify if you receive Pension Credit (Guarantee Credit element) or are on a low income with high energy costs. Check with your supplier — eligibility rules vary slightly between companies, and some have limited places.
Winter Fuel Payment
Since winter 2024/25, Winter Fuel Payment (£100–£300) is means-tested rather than universal for pensioners. You now need to receive Pension Credit or certain other means-tested benefits to qualify. If you're a pensioner on a low income who hasn't claimed Pension Credit, it's worth checking your eligibility — many eligible people don't claim it, and receiving it unlocks both the Winter Fuel Payment and the Warm Home Discount.
ECO4 — free insulation
The ECO4 scheme provides free loft, cavity, and solid wall insulation for low-income households in EPC D–G properties. It closes 31 December 2026 with no confirmed successor. If you think you might qualify, read our guide and apply now — funding is first-come, first-served.
Warm Homes Local Grant
Up to £15,000 for insulation and heating upgrades, delivered through your local council in England. Eligibility varies by council area. See how it compares to ECO4.
Boiler Upgrade Scheme
If you're considering replacing a gas boiler with a heat pump, the Boiler Upgrade Scheme provides £7,500 towards an air source heat pump. A heat pump running on a time-of-use tariff can cost less to run than a gas boiler — use our heat pump calculator to model the numbers for your home.
Not sure what you qualify for? Run our grants eligibility checker — it covers all current UK schemes.
5. Longer-term upgrades
Solar panels
Solar panels generate less in winter, but they still contribute — a typical 4kW system produces around 30% of its annual output between October and March. Combined with a battery and a time-of-use tariff, solar can reduce winter bills significantly. The 0% VAT rate on solar panels ends March 2027, so installing before then saves 20% on the upfront cost. See our solar guide and solar calculator.
Heat pumps
Air source heat pumps produce 2.5–3.5 kWh of heat for every 1 kWh of electricity. In a well-insulated home on a cheap-rate tariff, they can cost less to run than gas. The £7,500 BUS grant brings the upfront cost down to £4,000–£8,000 for most installations.
Home battery
A home battery lets you charge on cheap off-peak electricity and discharge during expensive peak hours. The saving depends on your tariff and usage pattern — typically £200–£500/year. See our battery storage guide for whether it makes sense for your setup.
Related winter guides
- October 2026 price cap: what changed and how to save — The cap rose 4%. What changed in pounds and 10 ways to claw back £300+.
- How to keep warm for less — 16 practical ways to stay warm without overspending on heating.
- How to prepare your home for winter — Room-by-room checklist to winter-proof your home before the cold sets in.
Published October 2026. Bill estimates based on Ofgem typical domestic consumption values and current price cap rates. Your actual bills will depend on your home, heating system, and usage patterns.