Ofgem Price Cap Impact Calculator (UK 2026)

What the Cap Actually Caps

The Ofgem price cap is NOT a cap on your bill — it's a cap on unit rates (per kWh) and daily standing charges. Your bill = (usage × unit rate) + standing charge × days. The widely-quoted 'typical household' figure (currently around £1,738/year for the April-July 2025 cap period) assumes specific usage levels: 11,500 kWh/year gas + 2,700 kWh/year electricity for a medium 3-bed home. Heavy users with the same unit rates pay much more. Light users — flat dwellers, energy-conscious households — pay

Standing Charges — The Hidden Tax

Standing charges are a fixed daily fee regardless of usage. As of 2026, these are: electric ~60p/day (£219/year), gas ~32p/day (£117/year). For a household paying £1,738 typical, £336 is standing charges — nearly 20% of the bill. For low-usage households (small flats, single occupants) standing charges can exceed actual usage charges, making moves to lower-standing-charge tariffs (or solar+battery+grid disconnection in extreme cases) financially worthwhile. Ofgem reviews standing charges annuall

Why Your Bill Differs From The 'Typical'

Three factors create individual variation: (1) Insulation quality — a poorly insulated home uses 50-80% more energy than a well-insulated one. Loft insulation, cavity wall insulation, double glazing, draught-proofing can collectively cut bills by 30-40%. (2) Heating habits — turning thermostat from 22°C to 19°C saves 18-25% on gas bills. Heating just used rooms (not whole house) saves similar. (3) Hot water usage — showers vs baths, dishwasher vs hand-wash, washing temperature. A 4-person family

What Reduces Bills More Than Switching

Since the energy crisis began in 2022, switching tariffs rarely beats the cap — the cap IS effectively the deal for most homes. What works better in 2026: (1) Insulation grants — the Great British Insulation Scheme and ECO+ scheme offer free or subsidised loft and cavity insulation for many households. (2) Smart meter + smart tariff — Octopus Tracker or Octopus Agile reward shifting usage off-peak; can save 30%+ for households able to run washing/dishwasher/EV charging overnight. (3) Heat pump (

Not financial advice. This calculator is for general information and education only. Figures are estimates and may not reflect your circumstances. For decisions, consult the FCA register and a qualified financial adviser. See our editorial standards.

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