How to Cut Your Energy Bills UK 2026 — 21 Proven Tips

UK energy bills have remained stubbornly high since the 2021–2022 price spike. The Ofgem price cap has helped limit the worst of it, but the typical UK household is still paying significantly more than they were five years ago — and most households have not done nearly enough to reduce their actual consumption.

This guide is 21 practical tips to cut your energy bills in 2026, ranked roughly from the cheapest and easiest to the more involved changes that pay off biggest over time. No gimmicks, no "unplug your phone charger" advice that saves you 14p a year. Just measures that actually move the needle.

Quick Wins — Free or Under £50

1. Turn the thermostat down 1 degree. The Energy Saving Trust estimates this saves around 10% on your heating bill. On a typical UK gas heating bill of £900/year, that is £90 saved for zero cost.
2. Switch to LED bulbs throughout the house. A single LED bulb uses 8–10W less than an old halogen or incandescent. With 20 bulbs in a typical home, switching saves £40–£60 per year. Bulbs cost £2–£5 each and last 15–25 years.
3. Wash clothes at 30°C instead of 40°C. Modern detergents clean effectively at 30°C. Reducing wash temperature saves around 40% of the energy per wash compared to 40°C.
4. Only boil as much water as you need. Overfilling the kettle wastes energy every single time you use it. Boiling a full kettle when you only need one cup uses 3–4 times the energy necessary.
5. Use a slow cooker instead of the oven. A slow cooker uses around 200W over 8 hours (1.6kWh). An oven uses 2,000W for 1 hour (2kWh). Slow cookers are more efficient for most casserole-style meals.
6. Bleed your radiators. Trapped air stops radiators heating fully. If any radiator is cooler at the top than the bottom, it needs bleeding. A bleed key costs under £2 and the process takes under 5 minutes per radiator.
7. Draught-proof doors and windows. Draught-proofing strips cost £5–£15 per door. The Energy Saving Trust estimates this saves £45–£60 per year in a typical home. Simple foam strips from a DIY store do the job.
8. Turn off devices at the wall. UK households waste an estimated £35/year on appliances left on standby. TVs, games consoles and set-top boxes are among the worst offenders.

Heating and Hot Water — The Biggest Bills

9. Install a smart or programmable thermostat. A basic programmable thermostat costs £15–£30 and lets you set different temperatures for different times of day. A smart thermostat (Hive, Nest, tado) costs £100–£200 but learns your habits and can be controlled by app. Savings of £100–£200/year are typical. Many energy suppliers offer smart thermostats free or at a discount.
10. Set the hot water cylinder to 60°C, not higher. Above 60°C is wasteful. Below 60°C risks Legionella. If you have a combi boiler and no cylinder, this tip does not apply.
11. Insulate your hot water cylinder. An uninsulated cylinder loses heat constantly. A cylinder jacket costs £15–£30 and can save £35–£40 per year.
12. Check your boiler pressure and service it annually. A boiler running at incorrect pressure is less efficient. An annual service keeps it running at peak efficiency and catches problems before they become expensive breakdowns. Many insurers include annual servicing in their boiler cover plans.
13. Use thermostatic radiator valves (TRVs) to heat only the rooms you use. Turn radiators down in rarely used rooms. Rooms you do not actively heat do not need to be at living room temperature.

Insulation — The Highest-Return Investment

14. Loft insulation. The single most cost-effective home improvement for energy saving. An uninsulated loft loses up to 25% of your home's heat. Installing 270mm of mineral wool insulation costs £300–£600 for most homes and saves £150–£200 per year. Payback in 2–4 years. Check if you qualify for a free installation under ECO4 (see tip 18).
15. Cavity wall insulation. If your home was built between the 1920s and 1990s, it likely has unfilled cavity walls. Filling them costs £400–£1,000 and saves £100–£200 per year. Again, check ECO4 eligibility first.
16. Draught-proof the loft hatch. The loft hatch is one of the most overlooked draught sources. Self-adhesive foam strips and a cheap latch to press the hatch tight can make a noticeable difference.

Tariffs and Billing — Stop Overpaying

17. Compare energy tariffs every 3–6 months. Fixed-rate tariffs sometimes undercut the Ofgem price cap, particularly for households with predictable usage. Use Uswitch, MoneySuperMarket or the Ofgem comparison tool. Enter your actual kWh usage (from a previous bill) rather than estimating "average."
18. Submit meter readings regularly. If you are not on a smart meter, submit readings monthly to avoid estimated bills. Overestimated bills mean you are lending money to your energy supplier interest-free.
19. Get a smart meter installed. Free from your energy supplier. Shows real-time usage which changes behaviour. Research suggests households with smart meters reduce consumption by 3–5%.

Government Schemes — Free Money on the Table

20. ECO4 scheme. The Energy Company Obligation (ECO4) provides free or heavily subsidised insulation, heat pumps and new boilers to households receiving certain benefits (Universal Credit, Pension Credit, Child Benefit on low income, etc.) or referred by their local council. Check eligibility at gov.uk/energy-company-obligation or call your energy supplier. This is genuinely free and worth checking even if you think you might not qualify — many households are eligible and do not know it.
21. Boiler Upgrade Scheme. If you are considering replacing a gas boiler with a heat pump, the Boiler Upgrade Scheme offers a £7,500 grant for air source heat pumps. Heat pumps are more efficient than gas boilers but have higher upfront costs — this grant significantly improves the economics. Apply through an MCS-certified installer.