Octopus Energy Group sustainability score: 34/100
Better than 30% of Energy Supply / Utilities
Making progress starts at 46. The highest score on SINK is 71.
Octopus Energy Group is a privately owned UK energy company supplying electricity and gas to around 10 million retail and business customers. It also generates renewable power and installs heat pumps, batteries, solar panels and EV chargers.
More about Octopus Energy Group
Revenue was £13.7bn in the year to April 2025, with about 10,000 employees.
Founded 2015Head office London, UKStaff ~10,030 (2025)Revenue £13,682.8m (GBP, FY ended 30 Apr 2025)Website ↗
Octopus Energy cut its own operational emissions, but its total footprint keeps rising as it supplies more customers, because gas burned by those customers dominates. Its SBTi targets are validated, but sold-gas emissions are moving away from them. It publishes no water, waste or nature figures.
Octopus Energy Group scores 34/100 (Below expectations) on SINK's independent climate assessment, scored from public data only. Scores are free. Nobody can pay to change a score, speed it up or hide it. Last verified November 2026.
That places Octopus Energy Group joint 598th of 1,023 companies scored, and joint 13th of 21 in Energy Supply / Utilities.
What is Octopus Energy Group doing well, and where does it fall short?
Strongest on Targets & Commitments and Carbon Footprint: Operations (8/10, 6/10). Weakest on Emissions Trajectory and Water Impact (0/10, 1/10).
Where Octopus Energy Group lost points
For each question that lost points, the evidence our public rubric looks for that we didn't find.
What would raise this score
- Whether its emissions are fallingShow its emissions are falling.
- Its effect on waterPublish figures for its water use.
- How it uses materials and handles wasteShow active waste reduction, reuse or repair.
Every question that lost points
- Emissions from its own operations6/10Its own emissions aren't independently verified or tracked over several years.
- Emissions from its supply chain6/10No full value-chain map or supplier engagement programme.
- Whether its emissions are falling0/10No evidence its emissions are falling.
- How clean its energy is6/10Less than 90% of its energy shown to be renewable.
- Its effect on nature4/10Its effect on nature isn't measured or independently verified.
- How it uses materials and handles waste2/10No active waste reduction, reuse or repair shown.
- Its effect on water1/10No figures for its water use.
- Its climate targets8/10No validated long-term net zero target.
- How openly it reports6/10No annual impact report, or no pay linked to climate targets.
- Its record on controversies6/10Points deducted for controversies or its business model. The finding is under question 10.
A score changes when the evidence does. We use new published evidence at the next rescore. Anyone can send us new evidence, free. How to send it.
How is Octopus Energy Group's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleHas Octopus Energy Group's score changed?
Octopus Energy Group's score has moved from 39 to 34 across 2 recorded reviews, down 5 points.
- 39 → 34-57 November 2026
Re-scored under the current method. Emissions rose to 20.4 million tonnes, mostly gas burned by customers, and several marks fell.
- Scored 398 February 2026
Initial score at platform launch
What evidence is Octopus Energy Group's score based on?
11 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
27% of them were published by Octopus Energy Group itself; the rest come from independent sources.
“1 2,721 4,790 2,719”
“11. Use of Sold Products 11,520,263”
“supply of electricity and gas to 10 million retail and business customers across eight”
“Octopus has a large renewables portfolio; but still relies on REGO certificates to cover its green tariff”
“Four energy companies have made the grade to become Which? Eco Providers for energy in 2023: 100Green, Ecotricity, Good Energy and Octopus Energy.”
“a wider area was sprayed by mistake which resulted in some wildflowers needlessly dying”
“Despite promoting the use of green energy, Octopus Energy attracts some criticism for its own climate change performance.”
“Octopus was installing just 5.8 per cent of its heat pumps for at or below the”
“An ad for Octopus Energy has been banned for misleading consumers with claims that they could have a heat pump installed for as little as £500.”
“Greg Jackson, the founder of Octopus Energy, is calling on Ed Miliband to reopen the North Sea to fossil fuel extraction”
If you believe a source has been misread or a newer version exists, submit a challenge.
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How does Octopus Energy Group compare with other energy supply / utilities companies?
Where Octopus Energy Group sits among energy supply / utilities peers.
Among the 21 major energy supply / utilities brands we've scored, Octopus Energy Group is tied =13th of 21, with 2 others.
Who scores higher in Energy Supply / Utilities?
The 3 companies in the sector scoring nearest above Octopus Energy Group.
Centrica discloses Scope 1, 2, and 3 emissions with DNV verification limited to operational scopes.
See the breakdown →National Grid publishes comprehensive emissions data with external assurance but its absolute emissions are rising across all scopes.
See the breakdown →EDF operates a 94% decarbonized electricity grid with strong operational emissions reporting and 63% Scope 1 reductions since 2017.
See the breakdown →Which companies moved this week, and why.
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