Enter your energy provider and the issue. Our AI generates a formal complaint letter citing the correct UK energy regulations — the same arguments a consumer rights advisor would use.
No sign-up required. Pay only when you are satisfied with the letter.
BillFight cites the exact regulations for your case — overcharges, billing errors, back-billing disputes and unfair practices all use different rules, and we handle them all.
References the specific licence conditions your energy supplier must follow, including billing accuracy, estimated reads and customer communication standards.
Cites your statutory consumer protection rights including reasonable pricing, service quality and remedies for breach of contract.
If your supplier failed to bill correctly, they cannot back-bill for energy used more than 12 months ago under Ofgem's back-billing rules.
Your supplier must treat you fairly, provide clear information and act in your best interest under Ofgem's Standards of Conduct.
If your supplier does not resolve your complaint within 8 weeks, you can escalate to the Energy Ombudsman for free. We include the escalation path.
Guidance on escalating to the Energy Ombudsman if your supplier rejects your complaint or fails to respond within the statutory timeframe.
No legal knowledge needed. BillFight does the heavy lifting.
Select your supplier, describe the problem — overcharge, estimated bill, back-billing, price cap breach, or service failure. Takes 60 seconds.
A formal letter citing Ofgem regulations, supplier licence conditions, the Consumer Rights Act 2015 and back-billing rules where applicable.
Download your complaint as PDF or copy the text. We tell you exactly where to send it, the deadlines, and how to escalate to the Energy Ombudsman if needed.
“British Gas tried to back-bill me for 18 months of usage. BillFight cited the 12-month rule and they dropped the excess charge within 2 weeks. Saved me £340.”
Karen P.
Bristol
“My estimated bills from OVO were double what I actually used. The complaint letter got them to install a smart meter and refund £180 in overpayments.”
James T.
Manchester
“EDF kept ignoring my meter readings and billing on estimates. BillFight letter referenced their licence conditions. Got a £220 credit within 3 weeks.”
Sarah M.
Leeds
Common questions
Yes. If you have been overcharged, received an unreasonable estimated bill, been back-billed incorrectly, or your energy supplier has breached Ofgem regulations, you have the right to complain. BillFight generates a formal complaint letter citing the specific UK regulations relevant to your situation.
Under Ofgem rules, energy suppliers cannot back-bill domestic customers for energy used more than 12 months ago if the supplier was at fault for not billing correctly. This applies to all licensed energy suppliers in the UK. BillFight automatically cites this rule when your complaint involves historical billing.
If your energy supplier has not resolved your complaint within 8 weeks, or has issued a 'deadlock letter' saying they cannot help further, you can escalate to the Energy Ombudsman for free. The Ombudsman can order compensation, apologies, and practical remedies. BillFight explains the escalation process in every complaint letter.
No. BillFight generates complaint letters based on publicly available UK energy regulations, Ofgem rules and consumer protection legislation. It does not constitute formal legal advice. For complex disputes or legal proceedings, we recommend consulting a solicitor or Citizens Advice.
BillFight works for complaints against any UK licensed energy supplier — including British Gas, OVO Energy, EDF, E.ON, Octopus Energy, Scottish Power, Shell Energy, and all other Ofgem-licensed suppliers. The same core regulations apply to all of them.
No. Enter your complaint details, get your letter. No sign-up, no account, no unnecessary data collection. You can optionally save your complaint for later reference.
Pricing
Only pay if you are satisfied with the letter.
Free assessment of your case before you pay.
Less than a phone call to your energy company.
Most people pay overcharged energy bills because they don't know how to complain effectively. BillFight gives you the same regulatory arguments a consumer rights advisor would use.
No sign-up required. Takes 2 minutes.