How to Cut Your Electricity Bill in Great Britain: A Practical 2026 Guide
UK electricity prices remain significantly higher than pre-2021 levels. The average household electricity bill in Great Britain is around £800–1,000/year — but the range is wide. Some households with flexible tech and smart tariffs are paying £400–600. Others on default tariffs are paying £1,200+.
The gap is largely explained not by how much electricity people use, but by when they use it and what they pay per unit. This guide covers the practical steps, roughly in order of impact.
Step 1: Know What You're Currently Paying
Before anything else, understand your current tariff:
- Unit rate (p/kWh): What you pay per unit of electricity consumed
- Standing charge (p/day): A fixed daily charge regardless of usage
- Total annual cost: Your current bill divided into these components
The average GB unit rate in 2026 is around 24–28p/kWh (within the Ofgem price cap), with a standing charge of 50–60p/day (~£180/year).
If you're on a default tariff from a Big Six supplier and haven't switched recently, you're almost certainly paying more than necessary.
Step 2: Switch to a Competitive Tariff
The energy market has changed significantly since the 2021–2023 crisis period. In 2026, competitive fixed-rate and time-of-use tariffs are available again from challenger suppliers.
For most households without flexible tech: A competitive fixed-rate deal from Octopus, OVO, EDF, or another supplier can save £100–200/year versus default tariff rates.
For households with an EV, battery, or heat pump: Time-of-use tariffs can save significantly more:
| Tariff | Best for | Potential annual saving vs. default |
|---|---|---|
| Octopus Agile | EV + battery, flexible habits | £300–700 |
| Octopus Go | EV, simple overnight charging | £200–400 |
| Octopus Intelligent Go | Smart EV charger, maximum EV savings | £250–500 |
| Octopus Flux | Solar + battery household | £300–600 |
| Octopus Cosy | Heat pump households | £150–400 |
| E.ON Next Drive | EV, alternative to Octopus Go | £200–350 |
The Market Prices view shows how wholesale electricity prices vary through the day — illustrating exactly why time-of-use tariffs create saving opportunities.
Step 3: Shift Flexible Loads to Cheap Windows
Even without switching tariff, reducing consumption during peak periods saves money on economy tariffs and reduces your contribution to grid stress. On a time-of-use tariff, this is where the savings actually land.
The simple rule: Avoid electricity use between 5pm and 8pm on winter weekday evenings.
This is when:
- Wholesale electricity prices peak (gas plants running at full capacity)
- Carbon intensity is at its daily maximum
- Grid stress is highest
Conversely, the lowest-cost, lowest-carbon windows are:
- 11pm–6am on windy nights (overnight)
- 10am–2pm on sunny days (solar peak, March–September)
Shifting these loads makes the biggest difference:
| Load | Shifting opportunity | Estimated saving (Agile tariff) |
|---|---|---|
| Dishwasher | Run overnight or midday (delayed start) | £30–60/year |
| Washing machine | Same as dishwasher | £40–80/year |
| Tumble dryer | Same as dishwasher | £50–100/year |
| EV charging | Overnight smart charging | £200–600/year |
| Hot water (immersion) | Overnight or solar peak | £80–200/year |
Most modern dishwashers and washing machines have a delayed start button. Use it. Set the wash to finish by 7am or start at 11am. This single habit change, applied consistently, is worth £70–140/year on Agile.
Step 4: Understand Your Biggest Energy Users
The average GB household's electricity consumption breaks down roughly as:
| Category | % of consumption | Notes |
|---|---|---|
| Heating and hot water | 15–40% | Much higher if electric heating or heat pump |
| Wet appliances (washing, dishwasher, dryer) | 15–20% | Highly schedulable |
| Cold appliances (fridge, freezer) | 10–15% | Run continuously, not schedulable |
| Lighting | 5–10% | LEDs dramatically reduce this |
| Consumer electronics | 10–15% | Standby loads often significant |
| EV charging | 0–30% | Depends entirely on mileage |
If you're still using halogen or incandescent bulbs, switching to LEDs is the lowest-effort saving available: typical LED retrofit saves £50–80/year in a full house.
If you have an old fridge or freezer (pre-2010), replacing it with an A-rated model can save 30–50% of its running cost.
Step 5: Reduce Standby Waste
Most homes have 200–400W of continuous standby consumption — devices using power when you think they're "off". Common culprits:
- Old set-top boxes and cable/satellite receivers: 10–25W each
- Games consoles in standby: 1–50W depending on model
- Desktop PCs and monitors on standby: 5–15W each
- Network routers and modems: 10–20W (these you generally want to leave on)
- Older TVs with standby lights: 1–5W
A smart plug with energy monitoring (e.g. Shelly, TP-Link Kasa) will show exactly how much any device is drawing. Identify devices drawing more than 5W in standby and either switch them off at the wall or replace them.
Cutting 100W of standby load saves roughly 876 kWh/year — around £220 at average unit rates.
Step 6: Use the 48-Hour Carbon Forecast
The 48-hour carbon intensity forecast on GB Power Insights shows predicted carbon intensity and an indication of cheapest/greenest periods for the next two days. Practical uses:
- Tomorrow morning: Is overnight wind strong enough that late-night charging is very cheap/green?
- Tomorrow afternoon: Will there be a good solar midday window for running appliances?
- Weekend planning: Is Saturday or Sunday better for energy-intensive tasks like laundry?
Even checking once a day and shifting one or two appliance runs saves meaningful carbon and cost over a year.
Step 7: Consider Longer-Term Investments
For those ready to invest, these technologies deliver ongoing savings:
Solar PV (3–4 kWp system): Reduces grid import by 20–40% over the year. Typical cost £6,000–9,000; payback 8–12 years at current prices, shorter with battery or smart export tariff.
Home battery (10 kWh): Enables Agile tariff arbitrage and solar storage. Cost £4,000–8,000; payback 5–9 years in the right setup.
Smart EV charger: If you have an EV, an Ohme or Zappi (£700–1,100 installed) pays for itself in under 2 years through better scheduling.
Heat pump: Replaces gas boiler with a more efficient electric alternative. Cost £8,000–15,000 (with BUS grant reducing this by £7,500); payback depends heavily on insulation quality and gas vs. electricity price differential.
Insulation: Loft, wall, and floor insulation reduce heating demand — benefiting any heating system. Often the highest-ROI investment for an older home.
The Practical Minimum
If you do only three things:
- Switch to a time-of-use tariff if you have an EV, battery, or heat pump
- Schedule your dishwasher and washing machine to run overnight
- Charge your EV overnight rather than when you arrive home in the evening
These three changes alone are worth £300–700/year for a typical EV-owning household — with no investment required beyond a tariff switch and using existing delayed-start functions.
Summary
- Check your current unit rate and compare against available tariffs — switching can save £100–400/year
- Time-of-use tariffs (Agile, Go, Flux) deliver the largest savings for households with flexible loads
- Shift dishwasher, washing machine, and tumble dryer to overnight or midday
- Charge your EV overnight — not when you arrive home at 6pm
- LEDs and standby reduction are quick wins with no ongoing effort
- The Market Prices dashboard shows how electricity prices vary — use it to plan your day
View today's electricity prices and find the cheapest window →