UK Energy Bill Saving
Ofgem reviews the default tariff cap quarterly. The current cap (illustrative): around £1,928/yr for typical dual fuel.
Use the calculator with your current annual bill. UK Ofgem cap typically reviewed January, April, July, October. Switching tariff or installing efficient heating typically saves 10-30%.
Worked examples
£1,928 default cap, 10% saving = £192.80/yr saved.
£2,500 large home, 25% via heat pump and insulation = £625/yr saving.
Sources:
Ofgem default tariff cap
· retrieved 2026-05-12.
Frequently asked questions
How is the Ofgem cap set?
Quarterly, based on wholesale energy prices and operating costs. The cap is on per-unit rates and standing charges, not total bills.
Can I switch and save?
In normal markets, fixed-tariff deals undercut the cap by 5-15%. Volatile markets sometimes have no cheaper deals available.