Energy Ombudsman vs Ofgem: when to escalate where (and why most businesses choose the wrong route)

Why most businesses pick the wrong route first

When a UK business has a serious unresolved dispute with its energy or water supplier, the instinct of the finance director or office manager is usually to "go to the regulator" — meaning Ofgem in energy, or Ofwat in water. They write to the regulator, expecting an investigator to take up the file. They then receive a polite but firm response explaining that the regulator does not handle individual customer complaints and redirecting them to the relevant Ombudsman scheme — Energy Ombudsman for energy, CCW (the Consumer Council for Water) for water. By that point, three to six weeks have been lost, the eight-week deadlock clock with the supplier may have run out, and the customer's position has weakened.

This guide explains the actual division of responsibility and gives a decision tree that gets your dispute to the right place first time. The short version is: individual disputes go to the Ombudsman; systemic licence-condition breaches go to the regulator. But the detail matters, because a few categories of issue do sit with the regulator directly, and a few categories of issue have to be taken through both routes in sequence.

What Ofgem actually does

Ofgem is the UK regulator for the gas and electricity markets. Its statutory remit, set out in the Gas Act 1986 and the Electricity Act 1989 as amended, is to protect the interests of existing and future consumers. It does this through three main mechanisms:

• Setting and enforcing supplier licence conditions. The Standard Licence Conditions cover everything from microbusiness protections to back-billing, complaint handling, smart-meter rollout obligations, vulnerable-customer treatment, and (from 2024) intermediary commission disclosure. Ofgem can fine, censure or revoke licences where suppliers breach these conditions systematically.
• Setting network charges and technical codes. Ofgem approves the DUoS, TNUoS and BSUoS methodologies, sets the price control on monopoly network operators, approves the Standard Conditions of the Distribution Connection and Use of System Agreement, and oversees the industry codes that govern settlement and metering.
• Running the price cap and consumer-protection programmes. The default tariff price cap, the Priority Services Register framework, the Faster Switching programme and the Warm Home Discount all sit within Ofgem's programmatic remit.

What Ofgem does not do is investigate individual customer disputes. If a single customer has a back-billing dispute, an estimated-read disagreement, an erroneous transfer, a smart-meter installation failure or a supplier-customer-service complaint, Ofgem will redirect to the Energy Ombudsman.

The exceptions — where you would write to Ofgem directly — are narrow. They include: evidence of a systemic breach affecting a class of customers (rather than just you); evidence of a TPI or supplier failing to comply with the 2024 commission-disclosure rules across multiple contracts; or a structural concern about a code, charge methodology or licence condition that warrants a regulatory consultation. Most individual businesses never need to write to Ofgem directly.

What the Energy Ombudsman actually does

The Energy Ombudsman is an independent dispute-resolution scheme approved by Ofgem under the Alternative Dispute Resolution Directive. It is operated by Ombudsman Services, a not-for-profit organisation based in Warrington. Membership of the scheme is mandatory for all UK domestic energy suppliers and for non-domestic suppliers serving microbusinesses; many also extend voluntary membership to larger non-domestic customers.

The Energy Ombudsman handles individual disputes where the customer has gone through the supplier's own complaints process, has reached either deadlock or eight weeks without resolution, and brings the dispute within twelve months of the initial complaint. The scheme is free for customers; suppliers pay a per-case levy.

What the Energy Ombudsman can do:

• Investigate the dispute by reviewing both sides' evidence.
• Issue a binding decision on the supplier requiring it to take a specific action — issue a corrected bill, refund a sum, apologise, restore a tariff, reverse an erroneous transfer.
• Award compensation for inconvenience and consequential loss, typically up to £10,000 (the limit is set by the scheme rules and is reviewed periodically).
• Require the supplier to identify and correct similar errors affecting other customers, where the case reveals a systemic issue.

What the Energy Ombudsman cannot do:

• Investigate disputes that have not been to the supplier's own complaints process first.
• Investigate disputes brought outside the twelve-month window from the initial complaint.
• Make decisions about the legality of a contract clause, the construction of a tariff, or the rate at which a network charge is recovered — these are questions for the courts or for Ofgem at the policy level.
• Investigate complaints by businesses that do not qualify as microbusiness on the relevant tests, where the supplier has not extended voluntary scheme membership to larger customers.

The eight-week deadlock rule

Both routes are gated by the supplier's own complaints process. The Standard Licence Conditions require every supplier to operate a fair and accessible complaints process, to acknowledge complaints in writing, to set out a complaint reference number, and to provide a final response — known as a "deadlock letter" — within eight weeks where the complaint has not been resolved sooner. The eight-week clock starts when you formally raise the complaint, not when the underlying issue first arose.

Three things can happen at the eight-week mark:

• The supplier resolves the complaint. They issue a corrected bill, a refund, an apology, or whatever is appropriate. The dispute is closed.
• The supplier issues a deadlock letter. They state in writing that they will not resolve the complaint to your satisfaction. This is your authorisation to escalate to the Energy Ombudsman.
• The supplier neither resolves nor issues deadlock. Eight weeks pass without a final response. You have the right to escalate to the Energy Ombudsman without a deadlock letter. The Ombudsman will accept the case on the basis of the eight-week limit having passed.

For microbusinesses, this eight-week rule is enforceable against the supplier — failing to handle a complaint within the timeframe is itself a licence-condition breach. For larger non-domestic customers, the position is more nuanced: the Ombudsman scheme does not apply by default, the eight-week rule is not enforced against the supplier, and the practical recourse may be to commercial dispute resolution rather than ADR.

A decision tree for getting your dispute to the right place

The following walks through the routing logic in order. Apply each step in sequence:

1. Have you raised the issue with the supplier in writing? If no — do that first. Use the supplier's formal complaints address (not the general billing address). Get a complaint reference number and the date of receipt confirmed. Without this, neither the Ombudsman nor the regulator can help.
2. Has it been less than eight weeks since you raised the complaint formally? If yes — keep working through the supplier's process. Push for a written response. Most disputes are resolved within this window if pursued; the Ombudsman cannot accept the case until the window has elapsed or you have received deadlock.
3. Has the supplier resolved the complaint to your satisfaction? If yes — the dispute is closed. If no — go to step 4.
4. Does the dispute fall within the Ombudsman's scope? Specifically: is this a billing dispute, a customer-service complaint, an erroneous transfer, a back-billing case, a smart-meter installation issue, a microbusiness rollover-notification dispute, or a similar individual-customer matter? If yes — escalate to the Energy Ombudsman. If no — go to step 5.
5. Is the dispute about a supplier or TPI behaviour that affects multiple customers? Is it about a systemic licence-condition breach, an apparently unlawful contract clause being applied across the supplier's book, or non-compliance with the 2024 intermediary commission-disclosure rules? If yes — write to Ofgem with the evidence. They will not resolve your individual dispute, but they may open a market investigation that benefits you and the wider customer base. Continue to pursue the Ombudsman in parallel for your individual remedy.
6. Are you a non-microbusiness whose supplier does not extend voluntary Ombudsman membership? If yes — the practical routes are: a formal pre-action letter under the Practice Direction on Pre-Action Conduct, mediation through a commercial mediation provider, or proceedings in the County Court (for sums under £100,000) or the High Court. We can advise on which is proportionate; for many disputes it is the pre-action letter that produces the resolution.
7. Is this a water dispute? The same eight-week rule applies. The escalation route is to the Consumer Council for Water (CCW) rather than the Energy Ombudsman. CCW handles water disputes via a different process but with broadly equivalent powers; Ofwat is the policy-and-licence-condition regulator equivalent to Ofgem.

When to use both routes

For the small set of cases that involve both an individual remedy and an apparent systemic breach, the right approach is to pursue both routes in parallel. The Ombudsman addresses your individual position; Ofgem addresses the wider market issue. They do not interfere with one another, and a regulator-side investigation does not slow or pause the Ombudsman-side dispute resolution.

An example we see often: a microbusiness customer whose contract was placed by a TPI without commission disclosure, in apparent breach of the 2024 supplier-licence rule. The individual remedy — a recalculation of the unit rate to remove the undisclosed commission, or termination without penalty — sits with the Ombudsman. The systemic question — whether the TPI is doing this to multiple customers and whether the supplier is enabling the breach — sits with Ofgem. The customer should pursue both.

Another example: a smart-meter installation that has caused billing chaos for one customer, where the supplier's installation processes appear systemically flawed. The individual position is with the Ombudsman; if the customer becomes aware that other customers have had similar problems with the same installation team or process, the systemic question is with Ofgem.

Building the file

Whether you take a dispute to the Ombudsman or to Ofgem, the quality of the file you build determines the speed and the outcome. Five items should be in every file:

• The contract. The signed copy, with all schedules. If you do not have it, request it from the supplier in writing — they are required to provide it.
• Twelve months of bills. Itemised, in date order. Every line on every bill should reconcile to the contract; where it does not, that is itself a finding.
• The complaint trail. Every email and letter to and from the supplier, in date order, with the complaint reference number on every page. Telephone calls should be summarised in writing to the supplier and the summary should be in the file.
• The independent benchmark. Where the dispute is about price or rate, an independent benchmark of what comparable contracts in the same period priced at gives the Ombudsman or Ofgem a calibrated reference point.
• The legal or regulatory position. The specific licence condition, contract clause or industry code that the dispute turns on, cited and quoted. Saying "the supplier behaved badly" is not enough; saying "the supplier failed to provide written contract-end notification within the 49-to-1-day window required by Standard Licence Condition 22B.4" is what moves the case.

This is the file we build alongside customers in our compliance casework. Where the customer has the time and capacity to build it themselves, we are happy to review and supplement; where they do not, we build it from scratch on a fixed-fee basis and represent through the Ombudsman process.

What a good outcome looks like

A successful Ombudsman case typically produces three elements: a corrected bill or billing position, a sum of compensation for inconvenience and consequential loss, and a written apology or behaviour commitment from the supplier. The compensation element is usually modest in absolute terms — a few hundred to a few thousand pounds — but the corrected billing position is often the much larger number. A customer who has been wrongly billed at deemed rates for nine months following a change of tenancy may receive thousands of pounds in corrected billing on the supply itself, and a few hundred pounds in compensation for the inconvenience.

A successful Ofgem-side outcome looks different. Ofgem may open a market investigation, issue a request for information to the supplier, ultimately impose a fine and require the supplier to identify and remediate all similarly affected customers. Customers contributing to a successful Ofgem investigation rarely receive direct individual remedy — that comes through the Ombudsman side — but the structural change to the supplier's practice is the longer-term value.

Common errors and how to avoid them

The errors we see most often in business disputes:

• Going to Ofgem first. Almost always slower. Go to the Ombudsman for individual disputes; copy in Ofgem only where there is a wider market issue.
• Letting the eight-week clock run without a written record. If the conversation has only happened over the phone, the Ombudsman cannot help. Put it in writing.
• Missing the twelve-month Ombudsman window. The Ombudsman cannot accept disputes brought more than twelve months after the initial complaint. Where the underlying issue is older, the initial complaint date is what matters; if the complaint was raised inside twelve months, the underlying period can extend further back.
• Assuming the Ombudsman covers larger non-domestic disputes. Many non-microbusiness customers find at the deadlock stage that their supplier does not extend voluntary scheme membership, and the practical route is commercial dispute resolution. Confirm scheme membership before relying on the Ombudsman route.
• Failing to ground the dispute in a specific rule. "The supplier behaved unfairly" rarely succeeds. "The supplier breached Standard Licence Condition X by doing Y on date Z" usually does.

If your supplier dispute has run beyond the eight-week deadlock and you are unsure which route is the right one, that is exactly the territory of our compliance casework. Send us the file and we will tell you, plainly, which route applies and how strong the case is before any costs are incurred.