UnitRate.co.uk

The energy price cap

The cap limits the unit rates and standing charges a default tariff can charge. It is not a limit on your bill — what you pay depends on how much you use.

Cap period now in force1 October to 31 December 2026
Electricity, GB average26.32p per kWh
Electricity standing charge54.83p a day
Gas, GB average7.97p per kWh
Gas standing charge29.68p a day

Source: Ofgem · Period: 1 October to 31 December 2026 · Last updated: 2026-10-01

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What the change costs you

Pick your region and usage. We price the published cap periods against each other so you see pounds a year, not a national headline.

kWh a year
kWh a year

Your yearly cost at capped rates

£1,922

In London at your usage

Electricity now (1 October to 31 December 2026)£875
Gas now£1,047

Source: Ofgem · Period: 1 October to 31 December 2026 · Last updated: 2026-10-01

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Why the headline figure is not your bill

The price cap limits the unit rates and standing charges an eligible default tariff can charge. It is not a maximum bill - what you pay depends on how much energy you use.

The widely quoted annual figure describes a household using typical amounts of gas and electricity, paying by direct debit. Use more and you pay more; use less and you pay less.

When does it change?

Ofgem reviews the cap quarterly and publishes the new levels weeks before they take effect. No later period has been published yet, so we show no figures for one.

Mistakes that change the answer

  • Treating the cap as a maximum bill rather than a cap on rates.
  • Comparing cap periods with different VAT treatment as if they were like-for-like.
  • Assuming the cap applies to a fixed tariff. It does not.

Common questions

Will my energy bill go up?
Only the calculator above can answer that for you, because it depends on your region, payment method and usage.
Is Unit Rate.co.uk part of Ofgem?
No. We are an independent calculator service that imports the figures Ofgem publishes and shows the source and date for every one.

See whether you could pay less

Your results above are based on official Ofgem figures and your own numbers. Switching is optional and nothing here changes what the calculation says.

Compare your tariff against another

Affiliate disclosure — commercial links never change your results or the Ofgem figures we show.

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