TL;DR
- Octopus Energy has held the top spot in Citizens Advice's quarterly supplier rating every quarter since Q2 2023, scoring 4.7 out of 5 in the Q4 2025 release.
- Complaints still happen, mainly on billing accuracy after a supplier-of-last-resort migration, smart meter comms failures, and resolution speed on heat pump and EV tariff edge cases.
- The formal route runs: in-app or email complaint -> escalation team -> deadlock letter -> Energy Ombudsman. The Ombudsman route is free for the customer and decisions are binding on the supplier.
- Customers can submit to the Energy Ombudsman after 8 weeks without resolution, or earlier if Octopus issues a deadlock letter. Most cases close within 6 to 10 weeks of submission.
- Guaranteed Standards of Performance compensation (Ofgem-set, around £30 to £40 per missed obligation) pays out automatically for certain failures, separate from any Ombudsman award.
Last reviewed: May 2026
Octopus Energy outperforms the rest of the UK retail energy sector on most service metrics, but it is also the largest domestic supplier by customer count after absorbing Bulb in 2022 and a series of smaller failures since. Scale alone produces a steady stream of complaints, and the routes for resolving them are not always obvious to a frustrated customer. Most cases never need to leave the supplier's own escalation team. The ones that do should follow a specific path.
Where Octopus complaints actually come from
The Q4 2025 Citizens Advice supplier rating put Octopus on 4.7 out of 5, the highest in the sector by a comfortable margin. The same dataset shows the bulk of remaining complaints clustered in three areas. Billing accuracy after migration from a failed supplier (mostly Bulb legacy customers but also smaller migrations) is the largest cluster. Smart meter comms failures and the resulting estimated bills sit second. EV and heat pump tariff edge cases, mainly around incorrect off-peak band billing or smart-charge integration, sit third.
Less common but more difficult are debt-recovery disputes involving prepayment customers who came across from a failed supplier with disputed opening balances. These can sit unresolved for months because the underlying data from the failed supplier was incomplete.
The catch is the data lag. Bulb migration started in late 2022 and concluded in 2023. Some opening-balance disputes from that migration were still being resolved in early 2026 when settlement audits surfaced new discrepancies. Customers caught in those cases need patience and good record-keeping.
The first move: in-app and email
The fastest route into Octopus's complaints process is the in-app message thread on the Octopus website or mobile app. The supplier's published service standard targets a response within 24 hours for a first-line message; for many simple cases (a duplicate direct debit, a missed reading, a wrong tariff move) the issue resolves in that first exchange.
Email to hello@octopus.energy reaches the same queue. Phone calls land in a different queue with longer waits but the same agents.
The escalation team is named and reachable. Each Octopus customer is assigned to a small team, displayed in the dashboard. The named team approach is unusual in the sector and produces faster resolution because the agent already has the context. Customers should keep all complaint correspondence inside a single thread; switching between email, phone, and chat fragments the record.
When to escalate inside Octopus
If a first-line response does not resolve the issue or does not match the customer's understanding of the facts, the customer can ask for the case to be escalated. The internal escalation team at Octopus is called the Operations Resolution Team. Reaching them is a matter of writing "please escalate this case" in the message thread; there is no separate phone line.
The escalation team has the authority to issue a goodwill payment, correct a billing error retroactively, override a tariff move, and trigger a smart-meter engineer visit. Most escalations close within 5 working days of being raised.
Where it breaks: cases that depend on a third party (the Data Communications Company, a previous supplier's records, or the customer's bank for direct debit reversals) take longer. Octopus cannot always control the timeline on those.
The deadlock letter and what it actually means
If the case is not resolved after 8 weeks, or if Octopus decides earlier that there is no further movement possible, the supplier issues a deadlock letter. The letter triggers the customer's right to escalate to the Energy Ombudsman.
A deadlock letter is not a refusal to engage. It is a formal acknowledgement that the supplier has exhausted its internal route. The letter includes the case reference, the position of Octopus on each disputed point, and an explicit statement that the customer can take the case to the Ombudsman.
Customers can also submit to the Ombudsman after 8 weeks without a deadlock letter, simply by demonstrating that the complaint was made and not resolved. The 8-week rule is set by Ofgem licence condition; the Ombudsman applies it consistently.
Submitting to the Energy Ombudsman
The Energy Ombudsman is the independent dispute resolution body for the GB domestic energy market. Submission is free for customers and can be made online, by phone, or by post. The Ombudsman handles each case in three stages: validation, investigation, and decision. The full process typically takes 6 to 10 weeks.
A summary of what the Ombudsman can award gives a sense of scale.
| Award type | Typical range | Notes |
|---|---|---|
| Financial correction | Variable | Refund of incorrect charges, rebilling at correct rate |
| Goodwill / inconvenience | £25 to £200 | For service failure, missed appointments, delays |
| Apology and action | Non-monetary | Often the only remedy on data and process issues |
| Compensation for distress | Up to £500 | Rare; usually for vulnerable customer harm |
The Ombudsman decision is binding on the supplier and optional for the customer. If the customer accepts the decision, Octopus must implement the resolution within 28 days. If the customer rejects, they retain the right to pursue the matter through court.
Guaranteed Standards of Performance compensation
Separate from the complaint process, Ofgem operates a system of automatic compensation payments called the Guaranteed Standards of Performance (GSOP). Failures that trigger GSOP payments include missed engineer appointments, late refunds at switch close, and unexplained delays restoring supply after a metering issue. The current GSOP amounts, last updated by Ofgem on 1 April 2024 and unchanged in the May 2026 review, are around £30 per failure for most categories.
GSOP payments are supposed to be automatic. Suppliers issue them without the customer needing to claim. In practice, customers sometimes have to remind the supplier; Octopus's record on automatic GSOP payouts is among the better in the sector but not perfect.
A customer who suspects a missed GSOP payment can raise it through the standard complaint channel. The payment is non-discretionary and the supplier cannot refuse if the trigger condition was met.
Practical advice for any Octopus complaint
Keep the case in one thread. Use the in-app message thread or one email address; do not switch channels mid-complaint. Each switch resets the agent context and adds days.
Take dated photos of meter readings when raising any billing dispute. Even smart meter customers should snap a manual reading at the moment a complaint starts. The reading is admissible evidence at the Ombudsman stage.
Note every interaction with a date and reference number. The Ombudsman case file is built from this evidence. Customers who keep good logs win more often.
Be specific about the remedy sought. "Refund of £X for the period Y to Z" is actionable. "Better customer service" is not.
If the issue involves a vulnerable customer (elderly, on the Priority Services Register, dependent on medical equipment), say so explicitly in the first message. Suppliers and the Ombudsman both apply faster handling for vulnerable cases.
When to consider switching as part of the resolution
For some cases the relationship has broken down beyond the point a resolution can repair. Customers can switch to a different supplier mid-complaint without losing the right to continue the case. The Ombudsman handles cases against the supplier in question regardless of current supply status.
The Ofgem switching rules updated in May 2022 require any switch to complete within five working days. A customer can leave Octopus, finish the complaint with the Ombudsman, and the case is processed normally.
That option is the safety valve. Most Octopus customers do not use it. The complaint resolution rate at first contact remains higher than at any other major UK supplier in the most recent Citizens Advice data.
The Citizens Advice rating methodology and what it captures
Citizens Advice has published a quarterly UK supplier rating since 2014, scoring suppliers on a 5-point scale across multiple service metrics. The methodology, updated most recently in 2024, weights five components: complaints per 10,000 customers (35%), customer service ease of contact (20%), billing accuracy (15%), switching transfer (15%), and customer commitment score (15%).
Octopus's consistent top-of-table position reflects strong scores across all five components, not just one dimension. The supplier's complaint volume per 10,000 customers ran at around 22 per quarter through 2025, well below the sector mean of 65. Ease of contact scored high because the named-team model delivers fast response. Billing accuracy ran above sector average because of the supplier's smart-meter-first architecture.
The methodology has limitations. It does not measure outcomes for customers whose complaints reached the Energy Ombudsman, which is a separate dataset. It also weighs ease of contact partly through call-centre wait times, which is a metric Octopus performs well on partly because the supplier routes customers to written channels first.
For customers using the rating as a sign-up signal, the Citizens Advice score is a reasonable proxy for general service quality but should be supplemented by checking specific tariff terms and the supplier's own published service KPIs. Octopus publishes a monthly customer service report that is more granular than the Citizens Advice quarterly rating.
Editorial disclaimer. Kaeltripton is an independent UK finance publisher. This article is general information for UK adults making their own decisions, not regulated financial advice. Complaint timelines, compensation thresholds, and supplier processes change. Figures reflect Octopus, Ofgem, Citizens Advice, and Energy Ombudsman publications dated before the last-reviewed date at the top of this page. For complaints, refunds, or vulnerable-customer protection the formal route runs through the supplier first and then the Energy Ombudsman.
FAQ
How long is the wait before escalating to the Energy Ombudsman?
Eight weeks from the date the complaint was first raised, or earlier if Octopus issues a deadlock letter. Both routes give the customer the same right of escalation.
Is there a customer-side fee to use the Energy Ombudsman?
No. The service is free to the customer. The supplier pays a case-handling fee to the Ombudsman.
What if the Ombudsman's decision is unsatisfactory?
The customer can reject the decision and pursue the matter through court. If accepted, the decision is binding on the supplier within 28 days.
Is compensation available while remaining a customer?
Yes. Lodging a complaint or going to the Ombudsman does not affect the customer's supply or tariff. Octopus cannot terminate a contract in response to a complaint.
What happens to a complaint after switching supplier?
The complaint continues against Octopus through the existing channel. Switching does not close the case.
Does the named-team approach apply to new customer complaints?
Yes. Every Octopus customer is allocated to a named team from sign-up. The team handles routine queries and complaints; escalation to the Operations Resolution Team is available for complex cases.