The only letter that names the exact Ofgem rule your supplier broke — drafted in 2 minutes, ready to escalate to the Energy Ombudsman.
Disputing a £480 back-bill? Fight it for £19.99 — around 4% of the amount you're disputing, and only if you send the letter.
Free case check first · No sign-up · £19.99 only if you send it
Pick your issue — watch it lock on
We cite the exact clause — not a generic template
Worth fighting
BillFight earns its £19.99 on the bills that are actually worth the fight — the four-figure catch-up, the doubled debit, the back-bill that should never have landed.
A catch-up bill for energy used more than a year ago, where the supplier was at fault for not billing you.
A sudden four-figure bill built on estimates instead of your actual meter reads.
Your monthly payment jumped far above real usage, quietly building the supplier a credit balance.
Under Ofgem's Guaranteed Standards you are due £30 when a supplier misses a booked appointment.
Three rules, one right answer
A generic template gives every complaint the same words. Different problems are protected by different law — the matching engine names the one that actually applies to you.
A supplier can't recover charges for energy used over 12 months ago where it was at fault for not billing you correctly.
A large catch-up bill lands for energy you were never properly billed for.
Suppliers must handle complaints fairly and promptly. Unresolved after 8 weeks — or a deadlock letter — unlocks the free Energy Ombudsman.
You complained, and 8 weeks passed with no fair resolution.
Billing must be performed with reasonable care and skill, and where no price was agreed, a reasonable charge is implied by statute.
You were overcharged, or the service fell below a reasonable standard.
How it works
No legal knowledge needed. No account. BillFight does the heavy lifting.
Pick your supplier and describe the issue. Sixty seconds, no account, no card. We run a free case check first.
The engine matches your situation to the exact Ofgem rule, licence condition or consumer-law section — and drafts a formal letter around it.
Download as PDF or copy the text. We tell you where to send it, the deadlines, and how to take it to the Energy Ombudsman after 8 weeks.
An honest comparison
Free templates and generic builders exist — we'd rather tell you the truth about them than pretend they don't. It is not about price. It is about whether the letter names the rule that wins.
Generic wording for every complaint. You cite nothing specific — and the supplier knows it.
A real lawyer, a real invoice, and days of back-and-forth for a single bill dispute.
The exact licence condition your supplier broke, cited in a formal letter — ready in 2 minutes.
| Capability | Free templates CAB · Resolver | £3 generic builder | BillFight |
|---|---|---|---|
| Names the specific rule for your situation | |||
| Cites the exact licence condition / statute | generic | ||
| Matched to your issue, not one-size-fits-all | |||
| Energy Ombudsman escalation path included | sometimes | ||
| Ready to send in 2 minutes | |||
| Tells you the deadlines that apply |
Pricing
A one-off £19.99 — no monthly plan, unlike DoNotPay. Pay once, for one letter that's yours to keep and send.
Free case check before you pay. You only pay when you're ready to send.
Often less than a single month's overcharge.
Independent — not affiliated with Ofgem, the Energy Ombudsman or any supplier. Escalating to the Ombudsman yourself is always free; you're paying for the cited letter that gets there fastest.
Common questions
Yes. If you have been overcharged, received an unreasonable estimated bill, been back-billed incorrectly, or your 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 cites this rule automatically when your complaint involves historical billing.
If your supplier has not resolved your complaint within 8 weeks, or has issued a 'deadlock letter', you can escalate to the Energy Ombudsman for free. The Ombudsman can direct financial awards of up to £10,000, plus apologies and practical remedies. BillFight explains the escalation process, and the deadlines that apply, 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.
Any UK licensed energy supplier — British Gas, OVO, EDF, E.ON, Octopus, Scottish Power, Shell Energy and every other Ofgem-licensed supplier. The same core regulations apply to all of them.
No. Enter your details, get your letter — no sign-up, no unnecessary data collection. You can optionally save a complaint for later reference.
Most people overpay because they don't know which rule protects them. BillFight names it, drafts the letter, and shows you exactly where to send it.
Fight my billNo sign-up · Free case check · Takes 2 minutes