Can I Challenge An Estimated Energy Bill?
Yes — and you should if it looks wrong. Estimated bills use predicted usage rather than what you've actually consumed, so they can be far too high (or misleadingly low). Here's how to put it right.
Look for an "E" next to the meter reading on your bill — it means the figure is estimated, not based on a real reading.
How to challenge it
- Take an accurate meter reading. Read your gas and electricity meters and submit the figures to your supplier straight away.
- Ask for a re-bill. Request that they recalculate the bill using your actual reading rather than the estimate.
- Keep records. Photograph your meters with a date, and keep copies of emails and reference numbers.
- Raise a formal complaint if they won't correct it, in writing, and keep the timeline.
- Escalate to the Energy Ombudsman after 8 weeks (or a deadlock letter). It's free and their decision is binding on the supplier.
Your protections
- Back-billing rules: suppliers generally can't bill you for energy used more than 12 months ago if they failed to bill correctly.
- The right to accurate billing: bills should reflect genuine usage where readings are available.
- Free, independent escalation via the Energy Ombudsman if a complaint stalls.
The best long-term fix is to stop estimates happening at all: submit regular readings or use a smart meter. It also helps to understand how suppliers calculate your payments and how to read your energy bill.
Check if you're overpayingHow to Check an Energy Bill for Mistakes
Work through your statement step by step: estimated versus actual readings, unit rates, standing charges and account balance — including a complaint template if your supplier will not correct an estimated bill.
PDF guide · Information checked 1 August 2026 · free, no email required