What is the October 2026 energy price cap forecast?

Cornwall Insight forecasts a typical annual price-cap figure of £1,729 for October to December 2026 under Ofgem's current typical-use definition. This is £66, or 4%, above the current £1,663 headline figure. It is a forecast, not Ofgem's final cap.

When will Ofgem announce the October 2026 energy price cap?

Ofgem says it will publish the cap for 1 October to 31 December 2026 by 26 August 2026. The new rates, once confirmed, will apply from 1 October.

Will the October forecast affect my fixed energy tariff?

Not while your fixed tariff is active. The price cap limits unit rates and standing charges on default tariffs, including standard variable tariffs. Check your contract end date and any exit fee before deciding whether to change tariff.

How long does it take to switch energy supplier?

Ofgem says a household switch should take up to five working days once you have chosen a supplier and provided the information they need. You can also ask for a later switch date.

Energy Price Cap Forecast October 2026: £1,729 Expected

Cornwall Insight's final forecast, published on 19 August 2026, puts the October to December energy price cap at £1,729 a year for a typical dual-fuel household paying by Direct Debit. That is £66 higher than Ofgem's current £1,663 typical-use headline: a predicted rise of around 4%.

This is a forecast, not the final cap. Ofgem says it will publish the confirmed October level by 26 August, with any new rates applying from 1 October.

The practical question is not whether every household should switch today. It is whether your current tariff, use and contract date leave you exposed to a bill you would rather make more predictable before winter.

Quick answer: should you do anything now?

On a standard variable tariff (SVT): your rates can change with the cap on 1 October. It is worth comparing your current cost with fixed options using your actual gas and electricity use.
Already on a fixed tariff: the forecast does not change your rates while the fix is active. Check your end date and exit fee before doing anything.
Not sure what tariff you have: look at your latest bill for the tariff name, contract end date and annual use in kWh. Taupia can read these details for you and compare live options.

The cap limits unit rates and standing charges on default tariffs. It does not cap what your household spends in total, so a national headline is only a starting point.

What Cornwall Insight is forecasting for October 2026

Cornwall Insight forecasts the October to December cap at £1,729 using Ofgem's current typical household consumption definition: 2,500 kWh of electricity and 9,500 kWh of gas a year.

You may also see a forecast of £1,941. That uses Ofgem's previous, higher typical-use definition, which makes it comparable with the current £1,862 equivalent figure. These are not two different forecasts; they are the same view shown using two different assumed levels of household energy use.

Cornwall Insight's forecast includes national-average direct-debit rates of 26.57p/kWh for electricity and 7.90p/kWh for gas, plus the usual regional variation in standing charges. Your own rates will depend on where you live, how you pay, and the type of meter you have.

Why energy bills are forecast to rise

The forecast points to continued pressure in wholesale energy markets before winter. Cornwall Insight cites uncertainty around the US-Iran conflict, low European gas storage, strong gas demand during the European heatwave, Norwegian production outages and Asian demand for LNG cargoes. It also notes small changes in Ofgem's methodology.

That context matters, but it should not push you into a rushed tariff decision. Forecasts can move before Ofgem announces the final cap, and a fixed deal is only a good fit if it works for your household's actual usage and circumstances.

Who is most affected by the October price-cap forecast?

The forecast matters most if you are on a standard variable tariff or another default tariff. Those tariffs follow the cap's unit-rate and standing-charge limits, so a confirmed October change would apply automatically.

If you are on an active fixed tariff, the cap does not reset your agreed rates. Your decision is more about what happens when the fix ends, whether there is an exit fee, and whether you value certainty over waiting for the confirmed October rates.

Renters and house-sharers should first check who is responsible for the energy account. If you pay the supplier directly and are named on the account, you can usually choose the tariff. If energy is included in your rent, ask your landlord or managing agent how your energy costs are set.

Should you fix your energy tariff before October?

There is no one right answer, but this is a useful decision check:

Find your current tariff, annual kWh use, payment method and contract end date on your bill.
Work out whether you are on a variable tariff or a fixed deal.
Compare the total annual cost of available tariffs, including standing charges and any exit fee.
Decide whether the certainty of a fixed rate is worth more to you than waiting for the confirmed cap.

Ofgem says a household supplier switch should take up to five working days once you have chosen a supplier and supplied the information needed. You can ask for a later switch date, which can be useful if your current fix ends close to October.

If the calculation feels like a lot, upload your bill to Taupia. We read your actual tariff and use, then compare live options against your household profile rather than a generic price-cap average.

When will the October 2026 price cap be confirmed?

Ofgem says it will publish the cap for 1 October to 31 December 2026 by 26 August 2026. Until then, Cornwall Insight's £1,729 figure should be treated as an informed market forecast rather than a final bill level.

When Ofgem publishes the confirmed cap, we will update this guide and our UK energy price-cap hub with the final figure and what it means for households on variable tariffs.