Estimated billActual readingRebill

Estimated electricity bill too high? Replace the estimate with evidence

An estimated bill is easiest to challenge when you send a current reading, reading date and photo, then ask for a corrected rebill.

Reviewed: 26 March 2026Focus: UK household energy billingType: Information, not legal advice

Why estimated bills become a bigger problem later

One wrong estimate is annoying. A long chain of estimates is dangerous because it can build a false balance and then end in a large catch-up bill when actual readings finally arrive.

That is why the aim is not just to lower one bill. It is to break the estimate cycle and get the account back onto real readings.

Best evidence and wording

  • Current reading photo.
  • Submission confirmation or screenshot.
  • The statement showing it was estimated.
  • A short request for a corrected bill.

Ask: “This statement appears to use an estimated reading. I have submitted an actual reading of [x] on [date]. Please rebill the account using the actual reading and confirm the corrected balance in writing.”

Frequently asked questions

Can an estimated bill also be too low?

Yes. The risk is that a later actual reading then creates a painful catch-up bill.

Do I need to complain straight away?

Often the first step is simply to submit an actual reading and ask for a rebill. Complain if the supplier ignores that evidence.

Should I send readings every month after an estimate issue?

Usually yes, until the account has clearly returned to accurate billing.