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. Here is the full 2026 trajectory, with current Cornwall Insight data.

• Q1 2026 (January–March): £1,758
• Q2 2026 (April–June): £1,641 — a 6.6% drop from Q1, and the year's low point
• Q3 2026 (July–September): £1,862 — confirmed by Ofgem on 27 May, a 13.5% jump. In effect now.
• Q4 2026 (October–December): £1,906 forecast — Cornwall Insight's 21 July update, a 2.4% rise from Q3

The numbers have worsened since June. At the end of that month, Cornwall Insight forecast October at £1,849 — essentially flat. Six weeks later, wholesale gas prices had risen enough to push the forecast to £1,906, even after a 5% VAT cut on electricity that saves the typical household about £44 a year. Without the VAT reduction, the forecast would have been higher still. The Iran ceasefire, brokered in June, provided temporary relief. It has not stabilised prices.

As Cornwall Insight's Dr Craig Lowrey noted on 30 June: "this is a pause, not a resolution to the conflict." A month later, the forecast proved him right.

The TDCV change complicates the headline. From 1 July, Ofgem now assumes a typical household uses 2,500 kWh of electricity and 9,500 kWh of gas annually, down from 2,700 kWh and 11,500 kWh. Under these new Typical Domestic Consumption Values, the July–September cap is £1,663 and the October forecast is £1,700. The unit rates and standing charges are unchanged — Ofgem simply acknowledges that households use less energy than they did a decade ago. When you see both figures quoted, the lower one is the new TDCV; the higher one uses the old definition. Both are correct; neither is misleading. For consistency with historical comparisons, this guide uses the old TDCV figures unless stated otherwise.

For context on how energy feeds into the wider cost of living picture, see our savings hub.

Every energy bill has two components: the unit rate — pence per kilowatt hour you actually use — and the standing charge, a fixed daily fee you pay even if you use zero energy. Both are capped by Ofgem if you are on a standard variable tariff.

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 approximately 57p for electricity and 29p for gas. These are national averages — regional variation matters.

The standing charge adds up. For a typical household, standing charges alone total about £315 per year — paid before a single unit of energy is consumed. Ofgem is reviewing the standing charge structure, and campaigners want it shifted into unit rates so households that conserve energy are actually rewarded. The split structure remains for now.

The VAT cut changes the arithmetic. On 21 July 2026, the government removed the 5% VAT on domestic electricity. This saves the typical household about £44 a year. It also slightly narrows the price gap between electricity and gas — a deliberate policy choice to encourage the switch to electric heating and vehicles. The cut is currently confirmed only until the end of the 2026/27 financial year, so treat it as temporary until the Budget confirms otherwise.

Three other facts about your bill:

1. Wholesale energy is roughly 40% of the cap. The rest is network costs, policy levies (green schemes, Warm Home Discount), supplier operating costs, and a small margin. Even 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. The Direct Debit cap is consistently the cheapest. Standard credit (paying on receipt of a quarterly bill) costs £130–£140 more per year. Prepayment meters have been levelled to match Direct Debit standing charges, removing the historical penalty.
3. The cap is not a total bill limit. It caps unit rates and standing charges. Use more energy, pay more. The headline figure — £1,862 or £1,906 — is for a household consuming exactly the TDCV amount. If you have a large home, electric heating, or a hot tub, your bill will exceed it substantially.

There are three tariff types in the UK energy market, but only one call that determines whether you save or overpay: fixed vs variable.

Standard Variable Tariff (SVT) — The default. If you have never switched or your fix expired, you are on this. Capped by Ofgem, reset quarterly. Currently £1,862 (July–September). No exit fees. Total flexibility. But you ride every price change.

Fixed-rate tariff — You lock unit rates and standing charges for 12 or 24 months. Price certainty. If the cap rises, you are protected. If it falls, you are stuck. Fixed deals are not covered by the cap — Ofgem only monitors them for fairness.

Prepayment tariff — Pay before you use. Now largely levelled with Direct Debit on standing charges. If you have a traditional (non-smart) meter, ask your supplier about a free smart meter upgrade.

The call in August 2026:

Three months ago, this section would have told you the October forecast was flat and the case for fixing was marginal. That advice is now wrong. Cornwall Insight's 21 July revision shows October at £1,906 — a £44 rise. And that forecast was made before the latest oil price spike. On 12 August, the Guardian reported that global oil stockpiles are "rapidly depleting," while Brent crude has been rising. If wholesale costs climb further in the remaining weeks of the October observation window, the actual cap could land above £1,906.

A 12-month fixed deal priced at or below £1,800 — roughly the current cap — now offers genuine protection. At £1,850–£1,900, it is a judgement call on winter. Above £1,900, you are paying for certainty you do not need.

The counterargument: staying variable preserves your right to benefit from any government winter support — and exit fees on fixed deals (£25–£75 per fuel) are real. If the Budget brings a block tariff or moves levies into general taxation, the variable cap could fall. But that is a political bet, not a market one.

For the opposing arguments in full: fix your energy now versus stay on the cap. Both are worth reading before you decide.

Universal energy bill support — the £400 Energy Bills Support Scheme, the Energy Price Guarantee — ended in 2024. What remains is a patchwork of targeted schemes. Here is what you can claim and what changed in 2026.

Warm Home Discount — A one-off £150 credit on your electricity bill each winter. You qualify automatically if you receive the Guarantee Credit element of Pension Credit. Some low-income working households may also qualify. The scheme operates in England, Wales, and Scotland, and is expected to reopen in October 2026. Prepayment customers get a voucher instead. This is the single most reliable support payment — if you are eligible, it just arrives.

Winter Fuel Payment — £200 or £300, but means-tested since winter 2024/25. Only those receiving Pension Credit or certain other benefits now qualify. This change removed the payment from approximately 10 million pensioner households. If you are over State Pension age and on a low income, check your Pension Credit eligibility — it unlocks both the Winter Fuel Payment and the Warm Home Discount. Our full breakdown: Winter Fuel Payment 2025/26.

Cold Weather Payment — £25 for each seven-day period when your area's temperature drops to 0°C or below. Automatic if you receive qualifying benefits. Modest but effortless.

Energy Company Obligation (ECO) — Large suppliers must fund efficiency improvements in eligible homes: free or subsidised loft insulation, cavity wall insulation, boiler replacements, and heat pumps. You may qualify if you receive certain benefits or live in fuel poverty. Contact your supplier — they will not contact you. Full details: UK Energy Grants and Schemes.

Household Support Fund — Discretionary crisis support distributed by local councils. Amounts and eligibility vary by area. Contact your council directly. This fund has been extended repeatedly but remains temporary, creating an annual cliff-edge for families who rely on it.

New in August 2026: Pylons discount. The government confirmed on 12 August that homes near new electricity pylons will receive £250 off their annual energy bills. The first eligible sites have been published. This is not a universal scheme — it only applies to households within a defined proximity of new transmission infrastructure — but it is a genuine new entitlement worth checking if you live near planned or existing pylon routes.

What is still missing: The government's VAT cut on electricity helps, but at £44 a year it is a rounding error against a £1,862 bill. Cornwall Insight and campaigners continue to push for social tariffs, moving policy levies into general taxation, or reintroducing targeted winter support — particularly given the PM's admission on 12 August that current cost of living help is "not enough." The new Energy Secretary, Miatta Fahnbulleh, took office on 20 July. Her first Budget will signal whether support expands or stays frozen.

Switching energy supplier remains the single largest financial move most households can make — and the process is simpler than the inertia suggests. Ofgem's rules mean you only contact your new supplier. They handle everything else.

What you need: your postcode, current supplier name and tariff, your annual usage in kWh (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. 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. Check before switching
• Smart meters (SMETS2) work across suppliers — older SMETS1 meters may temporarily lose smart features during the switch
• If you move into a new property, you default to 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 from suppliers, so they show deals they are paid to promote. Use an Ofgem-accredited comparison service and check multiple sources. The Citizens Advice energy comparison tool is independent and worth consulting alongside commercial sites.

One tactic that works: once you have a target price from a comparison, call your current supplier and ask them to match it. Loyalty is rarely rewarded automatically, but retention teams have discretion — especially if you have been with them for years.

Standby lights and washing at 30°C help at the margin. But against a £1,862 bill, here is what makes a material difference, ranked by impact.

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

Turning your thermostat down by 1°C cuts heating consumption by roughly 10%. That is physics, not folklore. A programmable thermostat or smart system (Hive, Nest, tado°) means you only heat occupied rooms at occupied times. Thermostatic radiator valves (TRVs) let you shut off unused rooms entirely. This is the highest-impact change most households can make today at zero cost — assuming you already have basic controls. The Energy Saving Trust has detailed setup guidance.

2. Insulation — saving: £200–£400/year, but requires 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 (£500–£1,500) but lasts decades. If you own, insulate before anything else. If you rent, your landlord has a legal obligation to bring the property to at least EPC band E, and the government is consulting on raising this to band C by 2028. For financing options, see our green mortgages guide.

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

Seeing real-time spending changes behaviour. Ofgem research shows households with smart meters and IHDs reduce consumption by about 3% on average. It is not dramatic, but the meter is free and the display makes energy tangible.

4. Appliances — saving: variable, £30–£80/year per upgrade

When replacing white goods, the efficiency rating matters. An A-rated fridge-freezer uses roughly half the electricity of a C-rated equivalent from 10 years ago. But do not replace working appliances purely for efficiency gains — the payback period is too long. Wait until they fail, then buy the best rating you can afford.

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

The Boiler Upgrade Scheme offers £7,500 towards an air source heat pump. With the new electricity VAT cut, the running cost gap between heat pumps and gas boilers is narrowing — but the upfront cost remains the barrier. Heat pumps make most sense when your gas boiler is approaching end of life, not as a standalone retrofit. During the August 2026 heatwave, heat pumps also demonstrated a secondary benefit: they can run in reverse to cool homes, functioning as air conditioning in a warming climate. Gas boilers cannot do that.

The next price cap announcement lands in late August, covering October to December. Between now and then, four signals matter.

1. The Iran ceasefire. If it collapses, wholesale gas prices will spike within days, and fixed deals currently on offer will be pulled or repriced. If it holds and negotiations progress, the October cap could land closer to £1,850 than £1,906. The Strait of Hormuz remains the single largest variable in UK energy bills.

2. Oil prices. On 12 August, the International Energy Agency warned that global oil stockpiles are "rapidly depleting". Brent crude was trading above $85. Oil and gas prices are linked — gas extracted as a by-product of oil production, LNG shipping costs tied to fuel prices. Rising oil means rising gas means rising bills.

3. The Bank of England. The BoE held rates at 3.75% on 30 July but explicitly warned it is "ready to raise them if the Iran war escalates". Higher rates do not directly change your energy bill, but they signal the MPC's concern about energy-driven inflation — and they push up mortgage costs for households already squeezed by energy. The rate cycle and the energy cycle are now intertwined.

4. The Budget. Miatta Fahnbulleh's first Budget as Energy Secretary will confirm whether the electricity VAT cut extends beyond March 2027 and whether any additional winter support materialises. The PM's 12 August admission that cost of living support is "not enough" suggests movement is possible. But "possible" is not "promised."

Between now and October, the cap will almost certainly rise. The question is by how much. If you are on a standard variable tariff, you will feel it. If you can lock a fix at £1,800 or below, you have bought yourself a winter of certainty at a reasonable price.