If I'm on the Ofgem price cap, am I guaranteed to pay the headline figure?

No. The headline figure assumes typical consumption for a typical home. If you use more energy, your bill will be higher, even though your per-unit rate is capped. The cap protects the rate you pay per unit, not your total bill.

Can I challenge my energy bill if I think it's wrong?

Yes. Request your actual consumption figures, check they match your bill, and ask your supplier to explain any discrepancies. If they refuse or you disagree, escalate to their complaints team and then to Ofgem if needed.

What if I can't afford my energy bill even under the price cap?

Contact your supplier to discuss a repayment plan, ask about energy social tariffs (discounted rates for households in hardship), or speak to Citizens Advice or StepChange for support with negotiating payment arrangements and accessing local hardship funds.

Does the price cap apply to fixed-rate tariffs?

No. If you're on a fixed rate, the supplier set that rate when you signed up. The cap only applies to standard variable tariffs.

How often does the Ofgem price cap change?

Ofgem reviews and adjusts the cap every three months, based on wholesale energy costs and other factors. Check gov.uk for the current cap dates and amounts.

How does the Ofgem energy price cap actually work?

By Andrew Dunne, founder of Claro · Updated 13 June 2026 · Checked against official gov.uk guidance

The Ofgem energy price cap limits the per-unit price you pay for gas and electricity, plus the daily standing charge. If you use more energy than a typical household, your bill will exceed the headline figure even though your per-unit rate is capped. The cap updates every three months and applies automatically to all households on a standard variable tariff with a regulated supplier.

Your total bill is your actual consumption multiplied by the capped unit rate, plus the capped standing charge. Heavy users, poorly insulated homes, and households with electric heating will consistently pay more than the published cap figure.

The short version:

The cap limits per-unit rates and standing charges, not your total bill amount
High-usage households can pay more than the headline capped figure
The cap applies automatically if you're on a standard variable tariff
Your actual bill = (usage × capped unit rate) + capped standing charge
The cap changes every three months based on wholesale energy costs

What the cap actually limits

Ofgem sets a maximum price per kilowatt-hour (kWh) of electricity and per cubic metre of gas, plus a maximum daily standing charge. These are the per-unit rates your supplier can charge. Ofgem does not set a maximum total bill. A household using twice the typical amount pays roughly twice the capped figure, because it is buying twice as many units at the capped rate.

Why high-usage households exceed the capped figure

The headline cap is calculated using a typical household's assumed consumption. If your home is poorly insulated, you work from home, or you use electric heating, you will use significantly more than that baseline. Each extra unit is charged at the capped per-unit rate, pushing your total above the published figure. The cap protects you from inflated unit rates, not from the cost of heavy usage.

How the cap is set and updated

Ofgem reviews the cap every three months, adjusting it for changes in wholesale energy costs, network charges, and environmental levies. It applies to all customers on a standard variable tariff with a regulated supplier. Fixed-rate tariff customers are not covered; their rate was set at sign-up. If you switch suppliers, the new supplier's charges are capped at the same Ofgem limit.

Check your usage and challenge inaccurate bills

Request your actual consumption figures from your supplier in kWh and cubic metres, not estimates. Multiply your usage by the current capped unit rate and add the standing charge. If the result does not match your bill, ask your supplier to explain the difference. Incorrect billing is common when meters have been estimated rather than read. You have the right to challenge inaccurate bills and request a correction.

Keep your own meter readings as evidence.

Why the cap is not a bill cap, and what to do if you use a lot of energy

Most households hear 'price cap' and assume it limits what they will pay in total. This leads high-usage households to be shocked by bills that exceed the headline figure, even though the supplier is complying with the cap. The cap limits only the per-unit rate and standing charge; it says nothing about total consumption.

If you use significantly more energy than the typical household, you will pay more in total even under the cap. The recourse is to challenge inaccurate billing, apply for energy social tariffs if you are in financial hardship, or set up a formal repayment plan if you fall into arrears. Ofgem and your supplier have a duty to help, but only if you make contact and request support.

When to get professional help

If you believe your bill is inaccurate, escalate in writing to your supplier's complaints team, then to Ofgem if they do not respond within eight weeks. If you cannot afford to pay and are in arrears, contact your supplier immediately to request a payment plan or to ask about energy social tariffs.

If you face disconnection, Citizens Advice, StepChange, or your local council's welfare team can advise you on hardship funds and your consumer rights. You do not need a solicitor for billing disputes or Ofgem complaints; the process is designed for ordinary people.