Ofgem energy price cap explained
Last reviewed 30 September 2026.
The energy price cap is one of the most talked-about numbers in UK energy, and one of the most misunderstood. It does not cap your bill. It does not guarantee you a specific annual cost. What it does is set a maximum rate that suppliers can charge per unit of energy and per day of standing charge on their default tariff.
For 1 October to 31 December 2026, Ofgem’s confirmed Direct Debit headline is £1,723 per year on the 2026 typical-use benchmark, up 4% from the restated £1,663 July figure. The GB average Direct Debit rates for the October period are 26.32p/kWh for electricity and 7.97p/kWh for gas, with standing charges of 54.83p/day for electricity and 29.68p/day for gas. These are average cap figures, not an Octopus quote: rates vary by region, payment method and meter type. Use Ofgem’s unit-rate and standing-charge tables for the applicable period and region.
For comparison, 1 July to 30 September 2026 has a Direct Debit headline of £1,862 per year on the old typical-use benchmark, or £1,663 on Ofgem’s lower 2026 benchmark. The same Ofgem tables show July’s GB average Direct Debit rates as 26.11p/kWh for electricity and 7.33p/kWh for gas, with standing charges of 57.19p/day and 29.04p/day respectively. The October electricity figures include 0% VAT while gas still includes 5% VAT, so the underlying fuel movements cannot be read from the headline alone.
The Value Added Tax (Supplies of Domestic Electricity) Order 2026 now zero-rates qualifying electricity supplied in England, Wales and Scotland from 1 October 2026 to 31 March 2027. Suppliers are expected to apply the change automatically, including to fixed tariffs. Northern Ireland electricity remains within the reduced-rate rules and gas is not included in the zero rate. Treat it as one part of the October bill calculation, not a guarantee that the whole bill or every electricity rate will fall.
For comparison, the April to June 2026 Direct Debit headline cap was £1,641 per year on the same typical-use basis, with GB average direct-debit rates of 24.67p/kWh for electricity and 5.74p/kWh for gas. Use those older figures only as context for the July rise, not as current prices.
What the price cap actually is
Ofgem, the energy regulator, sets maximum unit rates for electricity and gas, and maximum daily standing charges. These apply to the standard variable tariff (also called the default or “out of contract” tariff) that customers end up on if they don’t actively choose something else.
The cap is reviewed and updated every quarter: January, April, July and October. Ofgem calculates it from wholesale energy costs, network charges, policy costs, operating costs, debt allowances, VAT and other regulated inputs. A fall in the headline cap does not always mean wholesale prices have fallen by the same amount. In the April to June 2026 cap, Ofgem’s published breakdown shows government policy costs falling sharply while network costs rose.
The “typical household” figure
The annual headline assumes a “typical” dual-fuel household and monthly Direct Debit. It is an annualised comparison, not the amount due for a three-month cap period. Always check the consumption benchmark alongside the headline before comparing quarters.
Ofgem updated the typical domestic consumption values from 1 July 2026 because average household use has fallen. Its October announcement uses 2,500kWh of electricity and 9,500kWh of gas for the typical dual-fuel headline. This is why the July period can appear as either £1,862 on the old benchmark or £1,663 on the 2026 benchmark without any change to the underlying July rates.
If you use more than the benchmark, your bill will be higher than the headline figure. If you use less, it will be lower. The cap limits the rate per kWh and per day, not the total you can be charged. A household that uses 20,000 kWh of gas will pay substantially more than one that uses 8,000, even though both are on the capped tariff.
This is the biggest misconception. When people say “my bill is higher than the price cap”, they usually mean their bill is higher than the headline figure. That doesn’t mean their supplier is overcharging. It means the bill is being compared with an average-use example rather than the home’s actual kWh use, region and payment method.
How Octopus relates to the cap
Octopus’s Flexible tariff is its standard variable tariff. Its rates are normally set close to the Ofgem cap and move when the cap changes. It is the fairest Octopus tariff to compare with the headline cap because both are default-tariff style prices.
The smart tariffs work differently:
Agile is not priced from the cap. Rates move with the wholesale market every half hour. Some slots can be above a cap-style unit rate, while others can be much lower. Agile also has its own 100p/kWh maximum import rate for extreme spikes. It can suit households that can shift or automate usage, but it is not a simple cap discount.
Tracker follows a daily wholesale-linked formula plus a fixed margin. Some days may be above a cap-style unit rate and some may be below. It is best judged over your own usage pattern rather than by one good or bad day.
Go and Intelligent Go use a cheap overnight or smart-charging rate alongside a higher day rate. They can work well for EV households that move a meaningful share of use into the cheap window. They can disappoint if most electricity use stays in the day.
Cosy has three rate tiers, with cheaper periods designed around heat-pump use. The question is not whether Cosy is always below the cap; it is whether your heat pump, hot water schedule and home comfort needs can avoid enough of the evening peak.
Flux is a solar and battery import/export route. Standard Flux is the manual solar-and-battery tariff to check against the live Octopus export pages, while Intelligent Octopus Flux is the separate automated battery route with extra eligibility and availability checks. Neither should be judged from the headline price cap alone.
Historical context
The price cap was introduced for default tariffs in 2019, after a separate prepayment cap had already existed. For the first few years it was relatively stable, moving up and down gently in response to moderate wholesale price changes.
Then came the 2022 energy crisis. Global gas prices rose sharply after Russia’s invasion of Ukraine and after post-pandemic demand returned. Ofgem’s calculated cap rose far beyond normal household expectations, then the government’s Energy Price Guarantee limited what households actually paid for a period.
Since that peak, prices have come down but they have not returned to pre-crisis levels. Through 2024, the cap fell from £1,928 in Q1 to £1,568 by Q3, before rising to £1,717 in Q4. In 2025, it moved between £1,738 in Q1, £1,849 in Q2, £1,720 in Q3 and £1,755 in Q4. The April to June 2026 cap was £1,641, then the July to September 2026 cap rose to £1,862 on the old typical-use benchmark. Ofgem restated July as £1,663 on its lower 2026 benchmark and has set October to December at £1,723 on that same basis.
Why the cap matters for tariff choice
The cap gives you a useful benchmark. For a breakdown of how each Octopus tariff works, see our understanding tariffs guide. If a smart tariff saves you 15% compared with Flexible, the cap helps you translate that into a rough pounds-and-pence comparison.
Think of the cap as the “do nothing” baseline. It is close to what you would pay on a standard variable tariff if you made no active tariff choice. A smart tariff is not automatically better; it is a fit question about your home, meter, car, heating, battery and willingness to shift usage.
Quarterly changes and what to watch
The cap changes every three months, which means standard variable prices are not fixed. Cap levels also vary by electricity region, payment method and meter type. Each quarter, check the new cap figures and compare them with your current tariff. If you are on a fixed deal, look at the actual unit rates, standing charges, exit fees and remaining term rather than only the headline annual cap.
The confirmed October to December figures above replace the July to September rates from 1 October, not from the announcement date. A bill spanning that boundary should separate the applicable rate periods. Check your tariff name, unit rates, standing charges and VAT treatment on the statement rather than expecting the national headline percentage to match your whole bill.
Compare the unit rates, standing charges, region, payment method and your own annual kWh use before deciding whether Flexible, a fixed tariff or a smart tariff fits. A national annual headline is only a benchmark, especially when the typical-use definition and electricity VAT treatment have both changed.
If you are choosing between Flexible, a fix or a smart tariff, compare the whole-home cost using your actual usage, day rate, standing charge and smart-meter requirements. Octopus’s October price-change guide explains its supplier-specific treatment; the Ofgem averages are not a substitute for your account rates. A lower-standing-charge pilot is a separate tariff decision and its higher unit rate can offset the standing-charge reduction.
Use Ofgem’s confirmed period and regional tables rather than treating a forecast for a later quarter as an announced rate. The published October figures apply only to 1 October to 31 December 2026.