Does this calculator use one shared rate for gas and electricity?

No. Electricity and gas have separate unit rates and standing charges, and the calculator uses each fuel's own values when you enter them.

Where do the current typical figures come from?

The current Ofgem quick-fill retrieves the effective price-cap rates and typical consumption values from PowerGuardian's canonical energy-market record. They are not hard-coded inside the calculator.

Are the ongoing tariff comparisons affected by cashback or referral offers?

No. Tariffs are ranked by their ongoing annual cost. Cashback, referral credits, multi-service discounts and 'up to' offers are shown separately and never deducted from the headline ranking.

Does the price cap limit my total bill?

No. The Ofgem price cap limits unit rates and standing charges only. Your actual bill depends on your energy use, region, meter type and payment method.

Is it worth switching energy supplier right now?

It depends on your current tariff versus the best available deals. Use our comparison and 'should I switch?' tools to see whether a fixed or better variable deal would save you money today.

How long does switching energy supplier take?

A switch typically completes within five working days, and there's a 14-day cooling-off period. Your supply is never interrupted — the same gas and electricity flow into your home.

Are there exit fees for switching?

Some fixed tariffs charge exit fees of around £30–£60 per fuel if you leave early. Variable and rolling tariffs usually have none. Always check before switching.

Will switching supplier interrupt my supply?

No. Switching only changes who bills you; the physical gas and electricity supply continues uninterrupted with no work needed at your home.

Should I choose a fixed or variable tariff?

Fixed tariffs lock your unit rates and protect against rises; variable tariffs follow the market and can fall. If prices are expected to drop, variable can win, but it carries more risk.

PowerGuardian Tools

UK Energy Bill Calculator

Estimate your electricity, gas or dual-fuel bill using separate unit rates and standing charges for each fuel.

See all your savings in one place

Enter your home details once and get personalised savings, supplier picks, recommended actions, calculators and guides on My PowerGuardian.

Go to My Dashboard

Figures reviewed June 2026 and updated monthly where appropriate. All results are estimates.

Fuel type

Electricity & gasElectricity onlyGas only

Rates include VAT (5%)

UK price-cap rates already include VAT. Turn this off only if you're entering ex-VAT figures — VAT is added once.

Effective 2026-07-01 to 2026-09-30. Checked 23/07/2026.

Electricity

Annual usage (kWh)

Enter your annual usage in kWh.

Unit rate (p/kWh)

Enter your unit rate in pence per kWh.

Standing charge (p/day)

Enter your standing charge in pence per day.

Gas

Annual usage (kWh)

Enter your annual usage in kWh.

Unit rate (p/kWh)

Enter your unit rate in pence per kWh.

Standing charge (p/day)

Enter your standing charge in pence per day.

The Ofgem price cap limits unit rates and standing charges, not the total amount a household can pay. Your actual bill depends on your energy use, region, meter and payment method.

Enter valid values for the selected fuel(s) to see your estimated bill.

Recommended for your homeAd

Energy Monitoring Devices

Tapo P110 Smart Plug (Energy Monitoring)

See exactly which appliances are quietly inflating your bill — track real-time watts, kWh and runtime from your phone.

Real-time energy monitoring
Cuts standby/vampire power
Schedule appliances off-peak

Shop on Amazon Typical benefit: ~£40/yr standby savings

Affiliate link — we may earn a small commission at no extra cost to you, which keeps PowerGuardian free and independent.

Frequently Asked Questions

Track your energy use

Independently chosen kit that helps UK households cut energy use.

See all

Energy Monitoring Devices

Tapo P110 Smart Plug (Energy Monitoring)

See exactly which appliances are quietly inflating your bill — track real-time watts, kWh and runtime from your phone.

Real-time energy monitoring
Cuts standby/vampire power
Schedule appliances off-peak

Estimated benefit: ~£40/yr standby savings

Shop on Amazon

Energy Monitoring Devices

Home Energy Monitor (Whole-House)

Track your whole-home electricity use live and find where the kWh are going before the bill lands.

Whole-house live usage
Spot expensive habits fast
App history & alerts

Estimated benefit: Awareness cuts ~5-10% use

Shop on Amazon

Affiliate links — we may earn a small commission at no extra cost to you. This keeps PowerGuardian free and independent.

Compare Your Energy Costs

Use PowerGuardian to understand your energy costs before switching supplier or changing tariff.

View Energy Guides

UK Energy Bill Calculator

See all your savings in one place

Tapo P110 Smart Plug (Energy Monitoring)

Frequently Asked Questions

Track your energy use

Tapo P110 Smart Plug (Energy Monitoring)

Home Energy Monitor (Whole-House)

Compare Your Energy Costs

Explore the Knowledge Centre

Save these results to My Dashboard

Continue Saving Money