How to compare energy tariffs fairly in the UK
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Quick answer: Compare energy on unit rates, standing charges, exit fees, contract length and whether the tariff beats the Ofgem price cap — not headline 'savings' alone. Use annual kWh usage from your bill; typical dual-fuel homes use around 2,700 kWh electricity and 11,500 kWh gas per year.
Energy comparison is a regulated activity in Great Britain. The price cap limits standard variable tariffs but fixed deals may beat or lag the cap depending on wholesale markets. This hub explains fair comparison without naming specific suppliers — verify live quotes on an Ofgem-accredited comparison service.
Price cap vs fixed tariffs
Standard variable tariffs track the cap quarterly — January, April, July and October. Your bill still depends on usage and meter type.
Fixed tariffs lock unit rates for 12–24 months. They can beat the cap when wholesale prices are expected to rise; they can underperform if prices fall.
Compare the full contract cost using your actual annual kWh — not a generic 'typical' household figure alone.
Unit rates, standing charges and exit fees
Low unit rates with high standing charges favour low users poorly — model both components.
Exit fees on fixed deals range from zero to £75+ per fuel. In the last 49 days before a fix ends you can usually switch without penalty.
Economy 7 and smart time-of-use tariffs need usage shifted to off-peak periods to benefit.
Green tariffs and help schemes
Green tariffs certify renewable electricity matching your use — read whether gas includes carbon offsetting or biomethane.
Social tariffs from suppliers reduce bills for qualifying benefit claimants — separate from switching supplier.
Struggling to pay? Contact your supplier early about payment plans and the Priority Services Register.
Common questions
Can I switch if I am in debt to my supplier?
Rules vary — recent debt may block switching until a payment plan is agreed. Contact your supplier before comparing.
Do smart meters help comparison?
They give accurate usage data for quotes and enable time-of-use tariffs — but installation is not mandatory to switch.
Is dual fuel always cheaper?
Not always. Compare electricity-only and gas-only against dual-fuel bundles — sometimes splitting wins.