Complaint letterTemplateUK energy bills

Energy bill complaint letter template for UK energy bill problems

This page turns a vague complaint into a structured written case. Use it after you know the actual billing issue and have the evidence ready, not before.

Reviewed: 2026-04-17Focus: UK household energy billingType: Information, not legal advice

Use this template the right way

  1. Replace the placeholders with the exact bill date, issue and evidence.
  2. Keep the complaint narrow. One billing problem is better than five weak paragraphs.
  3. State the correction you want: rebill, balance correction, refund or written explanation.
  4. Attach the supporting evidence with the same wording you use in the letter.

Energy bill complaint letter template

Subject: Complaint about incorrect energy bill dated [date]

Dear [supplier name],

I am making a formal complaint about the energy bill dated [date]. I believe the statement is incorrect because [specific issue: wrong meter reading / estimated reading / catch-up bill / direct debit increase / tariff or standing charge issue].

I have attached the evidence supporting this complaint, including [list the relevant evidence].

Please review the attached evidence and [rebill the statement / correct the balance / explain the calculation / revise the direct debit] and confirm the outcome in writing.

If you disagree, please provide a clear written explanation showing the readings, billed period, rates and account logic used.

Yours sincerely,
[name]

Do not pad the letter with general frustration. The strength comes from specificity and attachments.

Frequently asked questions

Should I call or email about an incorrect bill?

Email is usually better because you can attach the evidence and preserve the exact wording.

Do I need to know the regulation behind the error?

No. A clear factual explanation and the right evidence usually matter more.

What if the supplier keeps saying the bill is correct without explanation?

Ask for a line-by-line explanation and then move to the formal complaint route if they still avoid the actual issue.