How to compare energy tariffs after the July 2026 price cap rise
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Unit rates rose about 13% on 1 July for standard variable tariffs. Fixed deals may still beat the cap — compare unit rates, standing charges and exit fees using your actual annual kWh, not headline savings alone.
By Money Guide editorial team
Published:
Ofgem's July–September 2026 cap took effect on 1 July. Households on default tariffs see higher unit rates automatically. The cap limits what suppliers charge per unit — it is not a cap on your total bill, which still depends on usage and meter type.
Fair comparison uses your annual electricity and gas kWh from a recent bill. Typical dual-fuel homes use around 2,700 kWh electricity and 11,500 kWh gas, but your figure may differ materially.
Fixed tariffs lock unit rates for 12–24 months. They can beat the cap when wholesale prices are expected to stay high; they can underperform if prices fall. Exit fees often apply if you leave early — weigh remaining months against potential savings.
Standing charges apply daily even when you use no energy. Social tariffs, Warm Home Discount and supplier hardship schemes sit alongside tariff choice for eligible households.
Use an Ofgem-accredited whole-of-market comparison service for live quotes. Our compare energy tariffs guide, energy tariff comparator and cheap energy deals hub explain the decision framework.