Why Is My Energy Bill So High? A Practical Checklist

Opening a bill that is much higher than expected is stressful. Before you panic, work through the possible reasons. Most are explainable, and many can be fixed.

1. Check whether the bill is estimated

An estimated bill can be well above or below what you really used. Look for the word "estimated" or an "E" next to the reading. If it is an estimate, take a real reading and submit it so your supplier can correct the bill. Our guide to taking meter readings explains how.

2. Compare the unit rates and standing charges

Look at the rates on this bill and on the previous one. Prices can change when the Ofgem cap moves or when a fixed deal ends. If you have just moved from a fixed deal to a variable one, your rates may have changed substantially. See our guides on the price cap and fixed and variable tariffs.

3. Compare usage, not just cost

Find the kWh used this period and compare it with the same period last year. Weather and the season matter. A cold month can easily double a gas bill. If your usage is similar but cost has risen, the cause is price. If usage is up, look for a change in your household.

4. Think about what has changed at home

Someone working from home or a new baby or relative in the house.
A new appliance such as a hot tub, a second fridge, an electric heater or an electric vehicle charger.
More tumble drying or more time with the heating on.
A faulty appliance or immersion heater left on.

5. Check your direct debit

If your payment has gone up, it may be because your supplier has reviewed your account. Ask for the calculation they used and compare it with your real usage. Direct debits should reflect your expected annual use, so they can be reviewed if they are too high or too low.

6. Look for billing errors

Check that the meter serial number and readings match your meter, that you are billed for the right tariff, and that any credits or discounts have been applied. Contact your supplier if anything looks wrong.

7. Check for a fault or leak

Turn off everything and see whether your meter is still counting. A meter that keeps running when nothing is on may signal a fault, and you should contact your supplier. A sudden rise in gas use without a change in routine could be a sign of a boiler problem. Have it checked by a Gas Safe registered engineer.

What to do next

Take and submit accurate readings.
Ask your supplier to explain the bill and correct any mistake.
Reduce unnecessary use. Our energy saving guide offers simple starting points.
Compare tariffs and consider switching.
If you are struggling to pay, contact your supplier early. See what to do if you cannot afford your energy bills.

If you cannot resolve the problem with your supplier, the Energy Ombudsman can look into your complaint for free.