EPI Internal Tools

Ofgem Price Cap Forecaster

Quarterly Default Tariff Cap projections with separate electricity and gas breakdowns, built from the Ofgem Annex 9 methodology. Confirmed quarters use Ofgem published figures; forecast quarters are EPI estimates from the current forward curve.

Introduction to EPI's Ofgem Price Cap Assessment

In 2021, Ofgem's energy price cap for a typical household was around £1,000 a year and had remained relatively stable for some time. That changed rapidly. The cap increased by almost 30%, attracting significant mainstream media attention, before rising again by a further 40% as wholesale energy prices continued to climb.

Before those increases were announced, EPI's founder, Tony Jordan, had already begun monitoring the likely impact of wholesale-market movements by applying Ofgem's published price-cap methodology and estimating future cap levels ahead of the official announcements. This enabled Tony to provide media organisations with both an estimated cap level and an explanation of the wholesale costs and market conditions driving the forecast.

Throughout 2021 and 2022, Tony tracked the cap's development on a daily basis, publishing estimates of how each day's wholesale-price movements affected forthcoming cap periods. Some of those forecasts received national media coverage during the height of the energy crisis.

Price-cap forecasting is now undertaken by a growing number of analysts and organisations. Although it is not Energy Price Intelligence's primary area of focus, EPI continues to monitor the cap and publishes its independent assessment here.

Important note

The Ofgem price cap is not a maximum household bill. Actual bills depend on energy consumption, tariff structure, payment method and other relevant factors.

ConfirmedEPI ForecastIndicative⚡ Electricity🔥 Gas
Scenario Inputs

Adjust wholesale price assumptions to model different cap scenarios. Forecast and indicative quarters recalculate instantly. Confirmed quarters always show Ofgem published figures.

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Presets:
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Forecast data is for analytical purposes only. Not financial or procurement advice.

Sources: Ofgem Annex 9 Methodology, Ofgem Q3 2026 price cap decision, ICE Futures Europe, NBP indices, DESNZ Energy Trends.