The single most important thing to know about your energy bill is the unit price and the standing charge
Your energy bill is built from two main costs. The first is the daily standing charge, a fixed fee you pay every day just for being connected to the grid. The second is the unit rate, the price you pay for each kilowatt-hour (kWh) of energy you actually use. A kilowatt-hour is the standard measure of energy consumption, equivalent to running a 1,000-watt appliance for one hour.
Your energy bill is calculated from a daily standing charge (around 60p for electricity, 28p for gas) and a per-kWh unit rate (24.5p for electricity, 6.0p for gas). The Ofgem price cap limits these rates but not your total bill, so using less energy is the best way to save.
- Your bill has two parts: a daily standing charge and a unit rate per kWh.
- Ofgem's price cap limits the maximum unit rate and standing charge.
- The cap is reviewed quarterly in January, April, July, and October.
- Typical annual bill is £1,100 for electricity and £1,000 for gas.
- Actual rates vary by region and payment method like direct debit.
- The single most important thing to know about your energy bill is the unit price and the standing charge
- How the energy price cap sets the maximum you can be charged per unit
- Quick numbers, typical standing charges and unit rates for 2026
- Your energy bill is split into four main sections, usage, charges, payments, and account summary
- How do energy bills work, the direct answer on how your total is calculated
- Eligibility and how to confirm you are on the right tariff
- How to verify your meter readings and supplier charges are accurate
- What to do if your bill seems wrong or you cannot afford to pay
The standing charge covers the fixed costs of maintaining the national grid, meter reading services, and supplier overheads, regardless of how much energy you consume. The unit rate is the variable cost you control, multiplied by the number of kWh you use each month. Understanding these two numbers is the key to reading your bill and comparing tariffs accurately (Ofgem, 2026).
How the energy price cap sets the maximum you can be charged per unit
The energy price cap, set by Ofgem, limits the maximum unit rate and standing charge that suppliers can bill you for a standard variable tariff, also known as a default tariff. This cap is reviewed and updated quarterly in January, April, July, and October, based on wholesale energy market prices, network costs, and policy costs. The cap does not limit your total bill, only the price per kWh and the daily standing charge. The more energy you use, the more you pay (Ofgem, 2026).
Quick numbers, typical standing charges and unit rates for 2026
| Item | Electricity | Gas |
|---|---|---|
| Average standing charge per day | 60p | 28p |
| Average unit rate per kWh | 24.5p | 6.0p |
| Typical annual consumption (medium household) | 2,900 kWh | 12,000 kWh |
| Estimated annual bill at cap rates | £1,100 (approx.) | £1,000 (approx.) |
Actual rates vary by region and payment method, such as direct debit, prepayment, or standard credit. These figures are illustrative averages based on the January 2026 price cap level (Ofgem, 2026).
Your energy bill is split into four main sections, usage, charges, payments, and account summary
Your bill typically contains four clear sections. The usage section shows your meter readings, whether actual or estimated, and the total kWh used over the billing period. The charges section breaks down the standing charge and unit rate charges for both electricity and gas, plus VAT at 5%. The payments section lists the amount due, the date it was taken if on direct debit, or the amount you need to pay. The account summary shows your balance, any credit or debit carried forward, and your estimated annual usage (Ofgem, 2026).
how to read energy bill breakdown
How do energy bills work, the direct answer on how your total is calculated
Your total bill is calculated as: (Daily standing charge × number of days) + (kWh used × unit rate) + VAT at 5%. For dual-fuel customers, this calculation is done separately for electricity and gas, then added together. If you are on a fixed tariff, your unit rates and standing charge are locked for the contract period and are not affected by the price cap (Ofgem, 2026).
For example, a household using 2,900 kWh of electricity and 12,000 kWh of gas over 90 days would pay roughly: (90 × £0.60) + (2,900 × £0.245) + (90 × £0.28) + (12,000 × £0.06) + 5% VAT. This illustrates how the two charges combine to form your total.
Eligibility and how to confirm you are on the right tariff
Most households are on a standard variable tariff, which is covered by the price cap. You can switch to a fixed tariff for price certainty, but fixed tariffs are not protected by the cap. You are eligible for price cap protection automatically if you are on a standard variable tariff with any supplier. To confirm your tariff, check the “Tariff name” on your bill or your online account. If it says “Standard Variable” or “Default”, you are on the capped tariff. Prepayment meter customers are also protected by a separate price cap, which may differ slightly from the direct debit cap (Ofgem, 2026).
How to verify your meter readings and supplier charges are accurate
You must submit regular meter readings to your supplier, at least once a month, to avoid estimated bills. Estimated bills can be higher or lower than your actual usage. You can verify your supplier’s charges by comparing the unit rate and standing charge on your bill against the current price cap levels published on the Ofgem website. If you have a smart meter, your readings are sent automatically, but you should still check your online account for any discrepancies (GOV.UK, 2026).
smart meter accuracy vs manual readings
What to do if your bill seems wrong or you cannot afford to pay
If you believe your bill is incorrect, contact your supplier first. They must investigate and correct any errors within 8 weeks. If you are struggling to pay, your supplier must offer you a payment plan or debt repayment arrangement under Ofgem’s rules. You are protected from disconnection in winter, from October to March, if you are of state pension age or have a health condition. For unresolved disputes, you can escalate to the Energy Ombudsman, a free service, after 8 weeks (Ofgem, 2026).
Frequently Asked Questions
Your energy bill is made up of a daily standing charge (around 60p for electricity, 28p for gas) and a unit rate per kWh (24.5p for electricity, 6.0p for gas). Ofgem sets a price cap on these rates, reviewed quarterly, but your total bill depends on how much energy you use.
The standing charge is a fixed daily fee you pay just for being connected to the grid, covering maintenance, meter reading, and supplier overheads. According to Ofgem, the average standing charge in 2026 is 60p per day for electricity and 28p for gas.
A kilowatt-hour (kWh) is the standard unit of energy consumption, equivalent to running a 1,000-watt appliance for one hour. Your unit rate is the price you pay per kWh, so the more kWh you use, the higher your bill.
The energy price cap, set by Ofgem, limits the maximum unit rate and standing charge suppliers can charge on standard variable tariffs. It is updated quarterly in January, April, July, and October, and does not cap your total bill, only the rates per kWh and daily charge.
Your bill is calculated by multiplying your energy usage in kWh by the unit rate, then adding the standing charge multiplied by the number of days in the billing period. The price cap ensures these rates do not exceed Ofgem's limits.
