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

The energy price cap is the maximum amount energy suppliers can charge you for each unit of gas and electricity, plus the daily standing charge, if you are on a standard variable tariff (SVT). It is set by Ofgem, the energy regulator, and reviewed every three months. (Source: Ofgem price cap)

Critically, the price cap is not a cap on your total bill — it is a cap on the unit rates and standing charges. If you use more energy than the typical household, you will pay more than the headline figure. The cap is based on typical consumption of 11,500 kWh of gas and 2,700 kWh of electricity per year.

For Q1 2026 (January to March), the price cap for a typical household paying by Direct Debit is £1,758 per year. From 1 April 2026, this drops to £1,641 — a reduction of £117 or 6.6%. The main driver of this decrease is a £130 fall in the cost of government social and environmental schemes, partially offset by a £66 increase in network costs.

The cap applies to customers on standard variable tariffs — also called default tariffs. If you are on a fixed-rate deal, you are not covered by the cap (though Ofgem still monitors fixed deals for fairness). Prepayment meter customers have a separate cap level: £1,597 per year from April 2026, down from £1,711 in Q1.

Your energy bill is made up of two components: the unit rate (what you pay per kilowatt hour of energy used) and the standing charge (a fixed daily fee for being connected to the gas and electricity networks).

From April 2026, the capped rates for Direct Debit customers are:

• Electricity: 24.67p per kWh, with a standing charge of 57.21p per day (£208.82 per year)
• Gas: 5.74p per kWh, with a standing charge of 29.09p per day (£106.18 per year)

These figures include 5% VAT and are averages across England, Scotland and Wales — actual rates vary slightly by region.

Compared to Q1 2026, electricity unit rates are falling significantly (from 27.69p to 24.67p per kWh — an 11% drop), while gas unit rates see a more modest decrease (from 5.93p to 5.74p). However, the electricity standing charge rises from 54.75p to 57.21p per day, reflecting higher network investment costs.

Standing charges are a contentious issue. You pay them even if you use zero energy, meaning households that are very efficient or away from home for long periods still face a baseline cost of around £315 per year just for being connected to the networks. Some campaigners have called for standing charges to be absorbed into unit rates, but Ofgem has so far maintained the split structure.

There are three main types of energy tariff in the UK, and the one you are on makes a significant difference to what you pay.

Standard Variable Tariff (SVT) — This is the default tariff you are placed on if you do not actively choose a deal. Rates move up and down with the price cap each quarter. Most households that have never switched or whose fixed deal has expired will be on an SVT. It is almost never the cheapest option.

Fixed-rate tariff — You lock in a set unit rate and standing charge for a fixed period, typically 12 or 24 months. This gives price certainty: if wholesale energy costs rise, you are protected. However, if prices fall (as they are doing in April 2026), you could end up paying more than the cap. Fixed deals are not covered by the price cap, though Ofgem has rules preventing suppliers from charging excessively above market rates. When your fixed deal ends, you will automatically be moved to the SVT unless you switch again.

Prepayment meter tariff — If you have a prepayment meter (either traditional key/card or smart prepay), you pay for energy before you use it. Prepayment customers historically paid more than Direct Debit customers, but Ofgem introduced levelisation to bring standing charges into line. From April 2026, the prepayment cap is £1,597 per year — actually £44 less than the Direct Debit cap.

Smart meters have made the distinction between prepayment and credit meters less stark, as smart prepayment allows remote top-up and usage monitoring. If you are on a traditional prepayment meter, ask your supplier about switching to a smart meter at no cost.

Several government schemes exist to help households manage energy costs, particularly those on low incomes or who are vulnerable.

Warm Home Discount Scheme — A one-off £150 discount applied directly to your electricity bill each winter. You qualify automatically if you receive the Guarantee Credit element of Pension Credit, or you may qualify on low-income grounds. The discount is available in England, Wales and Scotland (but not Northern Ireland). If you have a prepayment meter, you will usually receive a voucher instead. You do not need to apply unless you are on a low income in Scotland.

Winter Fuel Payment — An annual payment of £200 or £300 (depending on age) to help with heating costs during winter. From winter 2024/25, this is means-tested: only those receiving Pension Credit or certain other benefits qualify, rather than all pensioners. If you are of State Pension age and on a low income, check whether you are eligible for Pension Credit, as it unlocks both the Winter Fuel Payment and the Warm Home Discount.

Cold Weather Payment — If you are on certain benefits and the temperature in your area drops to zero degrees Celsius or below for seven consecutive days, you receive £25 for each qualifying week. This is paid automatically.

Energy Company Obligation (ECO) — A government scheme requiring large energy suppliers to fund energy efficiency (gov.uk/find-energy-certificate) improvements in eligible homes. This can include 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 energy supplier or local authority to check eligibility.

Council Tax rebate and Household Support Fund — Some local authorities offer additional energy-related support through discretionary payments. Check your council's website for details.

For a deeper look at this area, read our guide to Winter Fuel Payment 2025/26.

Switching energy supplier is one of the most effective ways to cut your bills, though the savings depend on market conditions. When wholesale prices are stable or falling, fixed deals can undercut the price cap by a meaningful margin.

To switch, you can use a price comparison service (such as Ofgem-accredited comparison sites) to find the best available tariff. You will need your current usage figures (in kWh, found on a recent bill or your online account) and your postcode. The switching process typically takes 14–21 days, during which your supply is not interrupted.

Key points when switching:

• No exit fees on SVTs: You can leave a standard variable tariff at any time without penalty. Fixed tariffs may have early exit fees (typically £25–£75 per fuel), so check before switching.
• Cooling-off period: You have 14 days after agreeing to a new tariff to change your mind without penalty.
• Smart meters work across suppliers: If you have a SMETS2 smart meter, it will work with your new supplier. Older SMETS1 meters may temporarily lose smart functionality but still work as standard meters.
• Deemed contracts: If you move into a new property, you are placed on a deemed tariff (usually the most expensive option). Switch as soon as possible after moving.

With the price cap falling to £1,641 from April, the gap between fixed deals and the SVT may narrow. If you value certainty and believe wholesale prices could rise later in 2026, locking in a competitive fixed deal now could make sense. If you prefer flexibility, staying on the SVT and benefiting from any further cap reductions is a valid strategy.

Beyond switching tariffs, there are several practical steps that can meaningfully reduce your energy consumption and bills.

Heating controls — Reducing your thermostat by just 1°C can cut heating bills by roughly 10%. Using a programmable thermostat or smart heating controls (such as Hive, Nest, or tado°) allows you to heat your home only when needed. If you have thermostatic radiator valves (TRVs), turn them down in rooms you do not use.

Insulation — Around a quarter of heat is lost through an uninsulated roof and a third through uninsulated walls. Loft insulation is one of the cheapest and most effective improvements, with costs from around £300 (or free through ECO). Cavity wall insulation, draught-proofing, and double glazing all contribute to long-term savings.

Appliance efficiency — Switching to LED light bulbs, using your washing machine at 30°C, and not overfilling the kettle are small changes that add up. Energy-efficient appliances with high ratings (A or B on the new energy label scale) use significantly less electricity than older models.

Monitor your usage — A smart meter with an in-home display lets you see exactly what you are spending in real time. Research shows that households with smart meters and IHDs reduce their energy consumption by around 3% on average. Most suppliers will install a smart meter free of charge.

Consider your payment method — Paying by Direct Debit is typically the cheapest option, as the price cap is lowest for DD customers (£1,641) compared to standard credit (£1,772) or prepayment (£1,597 but with less flexibility). Setting up Direct Debit can save over £130 per year versus paying on receipt of bill.

This article is for informational purposes only and does not constitute financial or energy advice. Energy prices, tariffs, and government schemes are subject to change. For personalised advice on your energy costs, contact your energy supplier or Citizens Advice.