Electricity Cost Calculator UK 2025
Free UK Electricity Cost Calculator 2025. Calculate your electricity costs using Ofgem Energy Price Cap rates. Daily, weekly, monthly and annual estimates.
Last updated: February 2026
Electricity Cost Calculator
Calculate your UK electricity costs using current Ofgem Energy Price Cap rates. See daily, weekly, monthly and annual estimates.
Estimated Annual Electricity Cost
Understanding UK Electricity Costs
Your electricity bill is made up of two main components: the unit rate (the cost per kilowatt-hour of electricity you use) and the standing charge (a fixed daily fee regardless of usage). Both are subject to VAT at the reduced rate of 5%.
The Ofgem Energy Price Cap
Ofgem (the Office of Gas and Electricity Markets) sets a quarterly price cap that limits the maximum unit rate and standing charge energy suppliers can charge customers on standard variable tariffs. The cap does not limit your total bill -- if you use more energy, you pay more.
Price Cap History
| Period | Unit Rate (p/kWh) | Standing Charge (p/day) | Typical Annual Bill |
|---|---|---|---|
| Q1 2025 (Jan-Mar) | 24.50p | 61.64p | £1,738 |
| Q4 2024 (Oct-Dec) | 24.50p | 61.64p | £1,717 |
| Q3 2024 (Jul-Sep) | 22.36p | 61.64p | £1,568 |
| Q2 2024 (Apr-Jun) | 24.50p | 60.99p | £1,690 |
| Q1 2024 (Jan-Mar) | 28.62p | 53.35p | £1,928 |
Average UK Electricity Usage
Understanding how your usage compares to the national average can help you identify whether you are using more than expected and where savings might be possible.
| Household Size | Annual kWh | Daily kWh | Est. Annual Cost |
|---|---|---|---|
| 1 person (flat) | 1,800 kWh | 4.9 kWh | £666 |
| 2 people | 2,700 kWh | 7.4 kWh | £886 |
| 3 people | 3,100 kWh | 8.5 kWh | £985 |
| 4+ people | 4,100 kWh | 11.2 kWh | £1,230 |
| With electric heating | 7,000+ kWh | 19.2 kWh | £1,940+ |
| With EV charging | +2,500 kWh | +6.8 kWh | +£613 |
What Uses the Most Electricity?
| Appliance | Typical Wattage | Hours/Day | Annual Cost |
|---|---|---|---|
| Electric shower | 8,500W | 0.25 | £190 |
| Electric oven | 2,000W | 0.5 | £89 |
| Washing machine | 500W | 1.0 | £45 |
| Fridge-freezer | 150W | 24 | £322 |
| TV (55") | 100W | 4.0 | £36 |
| Kettle | 3,000W | 0.1 | £27 |
| LED lighting (10 bulbs) | 100W total | 5.0 | £45 |
| Laptop | 50W | 6.0 | £27 |
Tips to Reduce Your Electricity Bill
Switch Tariff
Compare fixed-rate deals which may be cheaper than the standard variable tariff. Use comparison sites like Uswitch, Compare the Market, or MoneySuperMarket. Switching takes about 21 days.
LED Lighting
Replace all bulbs with LEDs. An LED uses 75% less electricity than a traditional bulb. Replacing 10 halogen bulbs with LEDs saves approximately £65 per year.
Smart Meter
Get a free smart meter from your supplier. Seeing real-time usage helps most households reduce consumption by 3-5%. The in-home display shows what you are spending in real time.
Turn Off Standby
UK households waste an average of £65 per year on standby power. Use smart plugs or switch off at the wall. TVs, games consoles, and chargers are the worst offenders.
Wash at 30 Degrees
Washing clothes at 30 degrees instead of 40 uses around 40% less electricity. Modern detergents work effectively at lower temperatures.
Efficient Appliances
When replacing appliances, choose A-rated models. An A-rated fridge-freezer uses half the electricity of a D-rated one, saving around £75 per year.
Frequently Asked Questions
Under the Ofgem Energy Price Cap (Q1 2025), the electricity unit rate is approximately 24.50p per kWh for customers on standard variable tariffs in England, Scotland and Wales. Fixed-rate tariffs may be higher or lower. The standing charge is around 61.64p per day.
VAT at 5% applies on top. Rates vary slightly by region.
The Ofgem Energy Price Cap limits the maximum unit rate and standing charge that energy suppliers can charge on default/standard variable tariffs. It does not limit your total bill. The cap is reviewed quarterly and is based on wholesale energy costs, network charges, and policy costs.
It applies in England, Scotland and Wales. Northern Ireland has a separate regulatory system.
The average UK household uses approximately 2,700 kWh of electricity per year, which is about 7.4 kWh per day. Small households (1-2 people in a flat) use around 1,800 kWh, while larger households (4+ people) use around 4,100 kWh. Electric heating, heat pumps, and EV charging can significantly increase usage beyond these averages.
A standing charge is a fixed daily fee paid regardless of energy usage. It covers the cost of maintaining the electricity network, your meter, and government environmental and social obligations. Under the Q1 2025 Ofgem cap, the electricity standing charge is approximately 61.64p per day, adding around £225 per year. Even if you use no electricity, you still pay the standing charge.
The most effective ways include: switching to a cheaper tariff, replacing bulbs with LEDs (saves ~£65/year), turning off standby devices (£65/year), washing at 30 degrees, using a smart meter to monitor usage, upgrading to A-rated appliances, and improving home insulation. If eligible, check for government grants like ECO4 or the Great British Insulation Scheme.
Economy 7 offers cheaper electricity during 7 off-peak hours (usually overnight) but charges more during the day. It is worth it if you can shift at least 40% of usage to off-peak hours. It suits households with storage heaters, immersion water heaters, or those charging electric vehicles overnight. If most of your usage is during the day, a standard flat-rate tariff will be cheaper.
Ofgem Price Cap Q1 2026 Rates Explained
The Ofgem Energy Price Cap is reviewed and adjusted every quarter. For Q1 2026 (January to March 2026), the cap sets maximum rates that suppliers can charge customers on default tariffs. Understanding these rates helps you compare your current deal and spot opportunities to switch.
Unit Rates by Payment Method (Q1 2026)
The price cap varies depending on how you pay for your electricity. Direct debit customers typically get the lowest rates, while prepayment meter customers may pay slightly more.
| Payment Method | Unit Rate (p/kWh) | Standing Charge (p/day) | Typical Annual Bill (Elec Only) |
|---|---|---|---|
| Direct debit | 24.50p | 61.64p | £869 |
| Quarterly bill (on receipt) | 25.27p | 62.34p | £904 |
| Prepayment meter | 24.88p | 61.89p | £886 |
These figures assume typical electricity consumption of 2,700 kWh per year for a medium-usage household. Your actual bill depends on how much electricity you use. The standing charge is payable every day regardless of whether you use any electricity.
Economy 7 and Multi-Rate Tariffs
Economy 7 is a two-rate electricity tariff that charges a cheaper off-peak rate for 7 hours overnight (typically midnight to 7am, though exact times vary by region) and a more expensive peak rate during the remaining 17 hours. This tariff is designed for households with storage heaters or immersion water heaters that can heat up overnight using cheap electricity and release the heat during the day.
Economy 7 is only worthwhile if you can shift at least 40% of your total electricity usage to the off-peak period. If most of your consumption happens during the day (cooking, washing, entertainment), you will likely pay more overall on Economy 7 than on a standard flat-rate tariff. Typical Economy 7 rates under the Q1 2026 cap are approximately 10-12p/kWh off-peak and 30-33p/kWh peak.
Smart Meter Benefits
Smart meters are supplied and installed free of charge by your energy supplier. They send automatic meter readings to your supplier, so you always pay for what you actually use rather than estimated amounts. Key benefits include:
- Accurate billing: No more estimated bills or unexpected catch-up charges.
- In-home display: See your energy usage in real time, in pounds and pence. Research by the Energy Saving Trust shows this helps households reduce consumption by 3-5%.
- Time-of-use tariffs: Smart meters enable tariffs like Octopus Agile, where the price changes every 30 minutes based on wholesale costs. Savvy users who shift usage to cheap periods can save significantly.
- Easier switching: Second-generation (SMETS2) smart meters work with all suppliers, so you can switch without losing smart functionality.
Warm Home Discount Scheme
The Warm Home Discount provides a £150 one-off discount on your electricity bill each winter. You may qualify if you receive Pension Credit (Guarantee Credit) or are on a low income and meet your energy supplier's eligibility criteria. The discount is usually applied automatically between October and March. Check with your supplier to confirm whether you are eligible, as not all suppliers participate in the scheme.
Worked Examples: Electricity Costs for UK Households
Example 1: Single Person in a One-Bed Flat
Annual electricity usage: approximately 1,800 kWh. This household uses a standard flat-rate tariff and pays by monthly direct debit.
| Component | Calculation | Cost |
|---|---|---|
| Unit cost | 1,800 kWh x 24.50p | £441.00 |
| Standing charge | 365 days x 61.64p | £224.99 |
| Subtotal | £665.99 | |
| VAT at 5% | £665.99 x 5% | £33.30 |
| Total annual cost | £699.29 | |
| Monthly cost | £699.29 / 12 | £58.27 |
Example 2: Family of Four in a 3-Bed Semi-Detached House
Annual electricity usage: approximately 4,100 kWh. This family uses a standard tariff and pays by direct debit. They have a tumble dryer, dishwasher, two TVs, and charge an electric car at home adding roughly 2,500 kWh per year.
| Component | Calculation | Cost |
|---|---|---|
| Household unit cost | 4,100 kWh x 24.50p | £1,004.50 |
| EV charging cost | 2,500 kWh x 24.50p | £612.50 |
| Standing charge | 365 days x 61.64p | £224.99 |
| Subtotal | £1,841.99 | |
| VAT at 5% | £1,841.99 x 5% | £92.10 |
| Total annual cost | £1,934.09 | |
| Monthly cost | £1,934.09 / 12 | £161.17 |
Tip: Charging the EV on an Economy 7 off-peak tariff at approximately 11p/kWh would reduce the EV charging cost to around £275, saving over £337 per year on EV charging alone.
More Electricity Cost Questions
Yes, some suppliers offer tariffs with no daily standing charge. However, these tariffs typically charge a higher unit rate (often 3-5p/kWh more) to compensate. A zero standing charge tariff benefits very low-usage households -- for example, a holiday home or second property.
If your annual usage is above 2,000 kWh, a standard tariff with a standing charge will usually be cheaper overall. Always compare the total annual cost of both options using your actual usage figure.
For a standard digital meter, simply note the numbers on the display from left to right, ignoring any numbers after a decimal point or in red. For an Economy 7 meter, you will see two rows: one labelled "Low" or "Night" (off-peak) and one labelled "Normal" or "Day" (peak). Record both readings.
To calculate usage over a period, subtract the earlier reading from the later reading. If you have a smart meter, your in-home display shows daily and weekly usage automatically, and readings are sent to your supplier without you needing to do anything.
No. If you remain connected to the national grid, you will still pay the daily standing charge even if your solar panels generate enough electricity to cover all your usage. The standing charge pays for grid connection and maintenance, not for the electricity itself.
However, solar panels significantly reduce or eliminate your unit costs. Any surplus electricity you export can earn you money through the Smart Export Guarantee (SEG), typically paying 4-15p per kWh exported, depending on your supplier and tariff.
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Last updated: February 2026 | Reviewed with current Ofgem Energy Price Cap rates
Expert Reviewed -- This calculator uses current Ofgem Energy Price Cap rates and is updated quarterly. Last verified: February 2026.