Energy Bills Guide: UK Energy Bills Explained — Price Cap, Tariffs, Switching and How to Cut Costs

The Ofgem price cap resets every three months: 1 January, 1 April, 1 July, and 1 October. After months of forecast revisions, the October level is now settled.

• Q3 2026 (July–September): £1,663 — in effect now, under Ofgem's new typical-usage definition
• Q4 2026 (October–December): £1,723 — confirmed by Ofgem on 26 August, up 4% (3.6% unrounded)
• Q1 2027 (January–March): around £1,878 — Cornwall Insight's forecast of a further ~9% rise, landing at the peak of winter

The 4% headline understates the recent swing. As recently as 21 July, Cornwall Insight had pencilled October at £1,700 on the new usage basis. Six weeks of rising wholesale gas prices pushed the confirmed figure to £1,723 — and the forecasters' attention has already moved to January.

The rebasing matters more than most headlines admit. From 1 July, Ofgem lowered its assumed "typical" usage to 9,500 kWh of gas and 2,500 kWh of electricity a year, down from 11,500 and 2,700. Households have cut back since the crisis began, and efficiency has improved, so the regulator recalibrated. The unit rates and standing charges did not fall — only the assumed volume did. This guide now uses the new-basis figures throughout (£1,663 for July, £1,723 for October). If you see the older £1,850 July figure quoted elsewhere, it is the pre-rebasing number, not a different cap.

None of this changes the structural point: the typical dual-fuel bill is now around 70% higher than it was at the start of 2021, or roughly £600 a year more than pre-crisis levels. The quarterly bounces are noise around that trend. For context on how energy feeds into the wider cost of living picture, see our savings hub.

Every bill has two parts: the unit rate — pence per kilowatt hour you use — and the standing charge, a fixed daily fee paid even if you use nothing. Both are capped by Ofgem on standard variable tariffs.

For July–September 2026, the cap means the average Direct Debit household pays roughly 27p per kWh for electricity and 6p per kWh for gas, plus daily standing charges of about 57p and 29p. October's rise comes almost entirely from the gas side. Kenward's own framing: gas up 8%, electricity fractionally down after the VAT cut. National averages vary by region, so treat these as a guide, not your bill.

The VAT cut changes the arithmetic — slightly. From October, the government removed the 5% VAT on domestic electricity, worth about £45 a year to the typical household. It narrows the price gap between gas and electricity, which is a deliberate nudge toward heat pumps and electric heating — but £45 against a £1,723 bill is a rounding error, not a rescue.

Three facts most readers get wrong:

1. Wholesale energy is only about a third of the cap. The rest is network costs, policy levies (green schemes, Warm Home Discount), supplier operating costs, and a margin. If wholesale gas halved tomorrow, your bill would not. The MoneyHelper energy advice service breaks this down.
2. How you pay changes what you pay. Direct Debit is consistently cheapest. Standard credit costs £130–£140 a year more. Prepayment meters have been levelled to match Direct Debit standing charges.
3. The cap is not a total bill limit. It caps unit rates and standing charges. Use more energy, pay more. The £1,723 headline assumes you use exactly the typical amount. A large home, electric heating, or a hot tub pushes you well past it.

Three tariff types exist, but one call decides whether you save or overpay: fixed vs variable.

Standard Variable Tariff (SVT) — the default. Capped by Ofgem, reset quarterly. Currently £1,663, rising to £1,723 in October. No exit fees, full flexibility — but you absorb every price move.

Fixed-rate tariff — you lock unit rates and standing charges for 12 or 24 months. Fixed deals are not covered by the cap; Ofgem only monitors them for fairness.

Prepayment — pay before you use. Standing charges are now levelled with Direct Debit.

The confirmed October figure simplifies a decision that spent all summer looking like a coin toss. Kenward's closing line on the Today programme was the tell: fixed tariffs are "available at £100 or more below the October price cap." That means a 12-month fix from roughly £1,620 a year.

Do the maths. A fix at £1,620 locks you £103 a year below the October cap — and if the January forecast of £1,878 materialises, that same fix is £258 a year cheaper through the coldest months. The premium you paid for certainty in May, when the outlook was flat, has now collapsed to zero. You are not paying for insurance; the insured route is cheaper than the uninsured one.

The counterargument still has weight: fixed deals carry exit fees (£25–£75 per fuel), and a political intervention — a social tariff, more levies moved into general taxation — could pull the variable cap down. But that is a bet on the Chancellor, not on the market. The market has already told you where it is going.

Read both sides before deciding: the case for fixing your energy now and the argument for staying on the cap. For the updated September maths, weigh £1,723 in October and £1,878 by January — fix your energy tariff now against the case that the January rise is already priced into fixed deals.

Universal support ended in 2024. What remains is targeted, and the 26 August announcement sharpened the argument over whether it is enough.

Warm Home Discount — a one-off £150 credit on your electricity bill, now confirmed for around six million households this winter. You qualify automatically on the Guarantee Credit element of Pension Credit; some low-income working households qualify too. The scheme reopens in October 2026. Prepayment customers get a voucher. If you are eligible, it just arrives — no application.

Winter Fuel Payment — £200 or £300, means-tested since winter 2024/25. Only those on Pension Credit or certain other benefits now qualify, which removed it from roughly 10 million pensioner households. If you are over State Pension age on a low income, check your Pension Credit eligibility — it unlocks both payments. Full breakdown: Winter Fuel Payment guide.

Cold Weather Payment — £25 for each seven-day period at 0°C or below. Automatic if you qualify. Modest but effortless.

Energy Company Obligation (ECO) — large suppliers fund free or subsidised insulation, boiler replacements and heat pumps for eligible households. Contact your supplier; they will not contact you. Details: UK Energy Grants and Schemes.

Household Support Fund — discretionary council crisis support. Amounts vary by area. Contact your council directly.

What is still missing is the part worth watching. Ofgem has a proposed debt relief scheme on the table, and Energy UK wants a discounted social tariff funded by taxation — it estimates a targeted plan would cost £1.9bn, against the £40bn universal bill protection cost in 2022. Prime Minister Andy Burnham called the increase "difficult" and promised more action; the new Chancellor, John Healey, delivers his first Budget shortly after the higher autumn bills land. Whether that Budget expands support or leaves it frozen is the single biggest political variable in your 2026/27 energy costs.

Switching remains the single largest financial move most households can make, and Ofgem's rules mean you only ever contact your new supplier.

What you need: your postcode, current supplier and tariff, your annual kWh usage (on any recent bill), and whether you are in a fixed-term contract. The switch takes about five working days. Your supply is not interrupted, and you get a 14-day cooling-off period.

Key rules:

• No exit fees on SVTs — leave any time
• Fixed tariffs may charge exit fees — typically £25–£75 per fuel
• SMETS2 smart meters work across suppliers; older SMETS1 meters may lose smart features temporarily
• Moving into a new property puts you on a "deemed contract" — the most expensive rate. Switch immediately
• Debt on your account may block switching. Clear it or agree a repayment plan first

Comparison sites earn commission, so they show the deals they are paid to promote. Use an Ofgem-accredited comparison service and check the independent Citizens Advice comparison tool alongside commercial sites.

One tactic that works: find a target price, then call your current supplier and ask them to match it. Loyalty is rarely rewarded automatically, but retention teams have discretion — especially for long-standing customers.

Standby lights and 30°C washes help at the margin. Against a £1,723 bill, here is what moves it, ranked by impact.

1. Heating controls — saving roughly 10% of your heating bill (£100–£150/year)

Dropping the thermostat 1°C cuts heating use by about 10%. That is physics, not folklore. Programmable or smart thermostats and thermostatic radiator valves mean you heat occupied rooms at occupied times. This is the highest-impact change at near-zero cost. The Energy Saving Trust has detailed guidance.

2. Insulation — saving £200–£400/year, but it needs upfront capital

A quarter of heat escapes through an uninsulated roof, a third through uninsulated walls. Loft insulation costs £300–£500 — free through ECO if you qualify — and pays back within two years. Cavity wall insulation costs more but lasts decades. If you own, insulate first. If you rent, your landlord must reach at least EPC band E, with consultation under way on raising that to C by 2028. Financing options: green mortgages guide.

3. Smart meter with in-home display — saving roughly 3% (£55/year)

Seeing real-time spend changes behaviour. The meter is free; the display makes energy tangible. Not dramatic, but effortless.

4. Appliances — £30–£80/year per upgrade

An A-rated fridge-freezer uses roughly half the electricity of a decade-old C-rated one. But do not replace working appliances for efficiency alone — the payback is too long. Wait until they fail, then buy the best rating you can afford.

5. Heat pumps — £100–£300/year vs gas, but £7,000–£14,000 installed

The Boiler Upgrade Scheme offers £7,500 toward an air source heat pump. The VAT cut and the 8% gas rise are narrowing the running-cost gap between heat pumps and boilers — gas is getting more expensive while electricity is not. Heat pumps make most sense when your boiler is nearing end of life, not as a standalone retrofit.

October is confirmed. The next question is January, and four signals will settle it.

1. The Iran conflict. Wholesale gas prices are 61% higher than late 2025, and the Strait of Hormuz remains the single largest variable in UK energy bills. A collapse sends gas through any remaining observation window; a durable settlement pulls the January forecast down.

2. Europe's gas storage. The summer heatwave reduced stored energy across Europe, which now needs restocking through autumn — competing demand that piles pressure on prices regardless of the Gulf.

3. The debt spiral. Total unpaid energy debt has reached a record £6bn, expected to hit £7bn by year-end. Baringa estimates the cost of covering it could reach £100 on every household's bill by the end of the year — up from about £60 today. The households who pay are quietly subsidising those who cannot, and the number is rising.

4. The Budget. John Healey's first Budget lands soon after the October rise. It will confirm whether the electricity VAT cut extends beyond March 2027, whether the Warm Home Discount expands, and whether a social tariff materialises. The gap between "looking at it" and "doing it" is where your 2027 bill is decided.

Between now and January, the cap will almost certainly rise again. The only question is by how much. If you are on a standard variable tariff, you will feel every point of it. If you can lock a fix at £100 below the October cap, you have bought a winter of certainty at a discount to doing nothing.