Can You Appeal an Energy Ombudsman Decision?

There is no appeal button inside the Energy Ombudsman scheme. What you have instead is a choice — accept, or reject and go elsewhere — and the deadline for making it is shorter than most people think.

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The word "appeal" doesn't really apply to the Energy Ombudsman. There's no panel above it that reconsiders the merits of your case, and no internal escalation route where a more senior decision-maker looks at it again just because you disagree with the outcome. What the scheme gives you is a final decision — and then a choice about what to do with it.

Is an Energy Ombudsman decision binding?

An Energy Ombudsman decision is only binding on the supplier, and only once you, the customer, accept it. Ombudsman Services runs the scheme as the Ofgem-approved alternative dispute resolution provider for the energy sector, and its process is designed to be one-sided in this specific way: the supplier is bound the moment you say yes, but you're not bound at all until you do (Ofgem). If you accept, the supplier has to comply — usually a redress payment, a bill correction, or both — and Ombudsman Services expects that to happen within 28 days of your acceptance (Ombudsman Services).

If you don't accept it, nothing is enforced against you, and nothing is enforced against the supplier either. The decision simply lapses. That's the trade-off worth understanding before you do anything else: rejecting a poor decision costs you nothing procedurally, but it also doesn't automatically hand you a better one.

How long do I have to take a complaint to the Energy Ombudsman?

The deadline people miss isn't the one for rejecting a decision — it's the one for getting to the ombudsman in the first place. You have to refer a complaint to the Energy Ombudsman within 12 months of your supplier's final response letter, or after eight weeks have passed with no final response at all (Citizens Advice). Miss that window and the ombudsman route closes, regardless of how strong the underlying complaint is.

Once you have a decision in hand and you're unhappy with it, there's no separate statutory clock ticking down on your response — but there's a practical one. Evidence goes stale, contact details change, and suppliers become harder to reach the longer a dispute sits unresolved. Dinmore Bell's general advice to clients is not to sit on a rejected decision for months before deciding what to do next.

The decision letter itself sets a deadline for accepting, and that one matters more than it looks. A decision that has not been accepted by the date in the letter does not bind the supplier, so a business that meant to accept, got busy and let the date pass has not preserved its position. It has lost a binding outcome it could have banked and kept only a claim it now has to run itself.

Can my business use the Energy Ombudsman at all?

Businesses sit awkwardly across the scheme's boundary, and it is worth establishing which side you are on before anything else, because it decides which route you are on. Ofgem defines a microbusiness as one with fewer than 10 full-time-equivalent staff and turnover or balance sheet total of no more than £2 million, or one using no more than 100,000 kWh of electricity or 293,000 kWh of gas a year. Since August 2025 the scheme has also taken small businesses: fewer than 50 staff and turnover of at most £6.5 million (or a balance sheet total of £5 million), or consumption of no more than 200,000 kWh of electricity or 500,000 kWh of gas (Energy Ombudsman). A business can qualify on one fuel and not the other.

Above that line the ombudsman route is not available, and the argument has to be run commercially and, if necessary, through the courts. The businesses this catches are the ones in the middle: a growing operator that qualified when the contract was signed and does not now, or a group where one site qualifies and three do not.

Before you decide, check what the decision actually covered

If your complaint said "our bills are too high" and your evidence was three invoices, the decision will be about three invoices. Businesses that get more out of the process build the account before they build the argument: the full billing history in date order, every meter reading with its source, the exchange record showing what the supplier was told and when, the contract or renewal terms actually in force for each period, and a schedule setting out what you were charged against what you should have been charged. The difference between those two numbers is the claim. Everything else is context.

If the decision missed a period, a meter or a site that was genuinely part of the complaint, that is worth raising directly with Ombudsman Services before the acceptance deadline. Errors of fact and omissions are handled differently from disagreements about the outcome, and the two are worth separating in your own head before you write. Which brings you to the question of what to do if it is a disagreement.

What can I do if I disagree with the ombudsman's decision?

First, in narrow cases, you can ask Ombudsman Services to look again at its own decision — but this isn't a merits appeal. It's reserved for cases where there's been a genuine procedural failure: evidence you submitted wasn't considered, or there's been an administrative error in how the case was handled. Disagreeing with the outcome on the facts doesn't qualify.

Second, you can bring a claim in the County Court. Because you were never bound by the ombudsman's decision unless you accepted it, going to court afterwards doesn't require you to overturn anything — you're simply pursuing the underlying dispute (usually breach of contract or billing error) through a different forum. Claims of the size typical in energy disputes are usually dealt with on the small claims track, which is designed to be manageable without a solicitor conducting the whole case (GOV.UK). There is more time than the ombudsman's own 12-month window suggests, because the court route runs on the general limitation period for contract claims in England and Wales:

Six years is a legal backstop, not a reason to delay: evidence goes stale long before the clock runs out.

Third — and this is the one people overreach on — judicial review. It's available in theory, but only on public law grounds: that Ombudsman Services acted unlawfully, unfairly, or irrationally in reaching its decision, not that it reached the wrong conclusion on the facts. Judicial review doesn't re-run your case. It's expensive, has a strict three-month time limit, and is very rarely the right tool for an energy billing dispute. Dinmore Bell would only recommend exploring it where there's a genuine procedural failing, not as a substitute for disagreeing with the amount awarded.

Is it worth going to court instead?

The honest answer is: usually only when the sum involved is meaningful, the evidence is strong, and the supplier's conduct is clearly wrong rather than merely disappointing. Small claims proceedings are relatively low-cost and don't carry the same costs-shifting risk as higher tracks, but they still take time and require you to marshal your own evidence coherently. Where a business — rather than a domestic consumer — is disputing a supplier's conduct, the commercial contract terms often sit outside the ombudsman scheme altogether, which changes the calculation considerably.

This is where Dinmore Bell's energy ombudsman disputes service does the groundwork most founders don't have time for: working out whether the underlying dispute is actually stronger outside the ombudsman scheme, what a court claim would need to show, and whether the supplier's exposure makes a negotiated resolution more likely once litigation is a credible threat rather than an idle one. One dispute Dinmore Bell took through this route — an overbilling case resolved in the client's favour — turned on exactly this: the ombudsman's initial position undervalued the billing error, and the stronger outcome came from continuing to press the point rather than accepting the first number offered.

Where a specialist is needed

Bringing or defending a County Court claim, and certainly any application for judicial review, involves reserved legal activities — rights of audience and formal litigation conduct that sit outside what Dinmore Bell does directly. Where a dispute reaches that stage, Dinmore Bell instructs the right specialist, briefs them properly on the commercial facts, and holds the budget and the outcome throughout, so the founder isn't managing a barrister or solicitor relationship on top of running the business.