UK energy supplier complaints, 2026 Q2
Energy bills are the easiest place for a supplier to mess things up - wrong meter readings, surprise back-bills, frozen direct-debits, you’ve heard the stories. Ofgem and Citizens Advice publish a quarterly league table of which suppliers customers complain about most, and which resolve issues fastest. Here’s the data.
Data last updated: Ofgem 2026 Q2
Complaints per 100 customer accounts
Lower is better. Industry average for 2026 Q2: 0.9 per 100 accounts.
| Rank | Provider | Tier | |
|---|---|---|---|
| 1 | Octopus Energy | 1.2 per 100 accounts | Silver |
| 2 | Bulb Energy | 1.5 per 100 accounts | Gold |
| 3 | E.ON Next | 2.1 per 100 accounts | Silver |
| 4 | EDF Energy | 2.9 per 100 accounts | Standard |
| 5 | Utility Warehouse | 3.1 per 100 accounts | Standard |
| 6 | Shell Energy | 3.5 per 100 accounts | Standard |
| 7 | British Gas | 3.5 per 100 accounts | Standard |
| 8 | E.ON | 3.9 per 100 accounts | Standard |
| 9 | Scottish Power | 4.1 per 100 accounts | Below average |
| 10 | SSE | 5.3 per 100 accounts | Below average |
| 11 | Utilita | 7 per 100 accounts | Below average |
| 12 | Supplier C | 8 per 100 accounts | Below average |
| 13 | Supplier E | 8 per 100 accounts | Below average |
| 14 | Supplier A | 12.5 per 100 accounts | Below average |
Complaining about one of these suppliers?
Describe what happened and we’ll draft the letter - free to start.
How we score
Composite ratings combine the complaints rate (weight 0.5) and next-day resolution rate (weight 0.2), renormalised because Ofgem doesn’t publish a separate uphold rate for energy retailers. The full formula lives at /data/methodology.
For comms & PR teams
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Top 10 providers for UK Energy Suppliers.
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width="100%" height="520" frameborder="0" loading="lazy"
title="UK Energy Suppliers complaint league table - NoReply Index">
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Methodology
The composite score, weights and source data are documented at /data/methodology. If anything looks wrong, we'll fix it - the dataset is public and re-runnable.
Every figure on this page is verbatim from Ofgem and Citizens Advice under Open Government Licence v3.0. Republish freely with attribution.