Best Value Energy Suppliers Report 2026

The UK energy market in 2026 presents both challenges and opportunities for households. With the Ofgem price cap rising 13% to £1,862/year from 1 July 2026, competitive fixed tariffs remain available well below that level. This report assesses supplier value across eight weighted dimensions — tariff competitiveness, customer service, billing accuracy, digital tools, green credentials, flexibility, financial stability and complaint performance — to identify the best overall value and specialist picks for different household types.

• Octopus Energy has grown to around 8 million UK customers as of April 2026, making it one of the UK's largest suppliers. Octopus Energy press release, April 2026.
• Outfox Energy ranked #1 for customer service in Citizens Advice's April-June 2026 supplier ratings (4.03 out of 5), ahead of 100Green (3.90) and E.ON Next (3.71); Ecotricity, the top-ranked supplier in the second half of 2025, has since fallen out of the top three. Citizens Advice supplier customer service comparison.
• 100Green is a Which? Recommended Provider for 2026 (its second year running), and Which? states it is the only UK supplier offering both 100% renewable electricity and 100% green gas. Which?, 100Green review.
• Ofgem's energy price cap rose 4% to £1,723 per year from October 2026, up from £1,663. Ofgem press release Uswitch found that households who fixed their energy deal beat the price cap by £182 on average over the following year, though savings varied by when they switched. Uswitch, September 2026
• 835,000 UK households were on smart time-of-use tariffs by July 2025 (up 68% year-on-year), including 653,000 on EV-specific tariffs — about 2.8% of the domestic market. Ofgem, Tracking energy consumers' use of low carbon and flexible products and services: 2025.

• UK households reviewing their energy supplier
• Switchers looking to beat the Ofgem price cap
• EV owners, heat pump owners and solar households seeking specialist tariffs
• Consumer journalists and money-saving commentators

1. 011. Executive summary — key findings at a glance
2. 022. The UK energy market in 2026 and price-cap trajectory
3. 033. Methodology — how we define value
4. 044. Best overall value suppliers
5. 055. Supplier profiles — Octopus Energy, 100Green and Ecotricity
6. 066. The large legacy suppliers — critical assessment
7. 077. Best suppliers by household type
8. 088. Economy 7 and specialist meter customers
9. 099. Customer service rankings
10. 1010. Complaint performance
11. 1111. Tariff value analysis
12. 1212. Green energy value
13. 1313. Supplier watchlist 2026
14. 1414. What to expect in 2027
15. 1515. Key takeaways and switching checklist