Octopus Energy Group sustainability score: 39/100
Octopus Energy Group is a UK-based energy retailer and generator founded in 2010, headquartered in London. The company supplies electricity and gas to over 3 million UK households and businesses, operates 4.9GW of renewable generation capacity, and manufactures heat pumps through its RED subsidiary.
More about Octopus Energy Group
It is a major player in the UK energy transition and a prominent investor in distributed renewables infrastructure.
Founded 2010Head office London, UKStaff ~11,000Revenue ~£12.4BWebsite ↗
Octopus Energy has built comprehensive baseline emissions data and SBTi-verified net-zero targets covering all scopes, yet operational emissions are rising due to rapid growth. The company sources 100% renewable electricity via REGOs and PPAs, but relies on tradable certificates for 80% of supply—undermining additionality claims. Weak spots: no quantified nature footprint, minimal waste reporting, and unresolved incinerator controversy in Scotland.
Octopus Energy Group scores 39/100 (Below expectations) on SINK's independent climate assessment, scored from public data only. Scores are free. Companies can never pay for anything about their own score. Last verified May 2026.
That places Octopus Energy Group joint 432nd of 934 companies scored, and 8th of 20 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 (9/10, 7/10). Weakest on Resource Use & Waste and Water Impact (3/10, 3/10).
Where Octopus Energy Group lost points
For each question that lost points, the evidence our public rubric looks for that we didn't find.
- Emissions from its own operations7/10Its own emissions aren't independently verified or tracked over several years.
- Emissions from its supply chain7/10No full value-chain map or supplier engagement programme.
- Whether its emissions are falling4/10No evidence of a year-on-year fall in its total emissions.
- How clean its energy is7/10Less 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 waste3/10No active waste reduction, reuse or repair shown.
- Its effect on water3/10No monitoring of water use, or no measures to reduce it.
- Its climate targets9/10No 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) × ScaleWhat evidence is Octopus Energy Group's score based on?
13 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
62% of them were published by Octopus Energy Group itself; the rest come from independent sources.
Scored on 4 April 2026 under an earlier version of our method. We're re-checking it under the current method.
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 20 major energy supply / utilities brands we've scored, Octopus Energy Group sits 8th of 20.
Who scores higher in Energy Supply / Utilities?
The 3 companies in the sector scoring nearest above Octopus Energy Group.
OVO Energy reports detailed operational emissions cuts and has ditched greenwashing REGOs, but 9.8Mt of annual Scope 3 from gas supply to 4 million customers overwhelms progress.
See the breakdown →E.ON has SBTi-validated 1.5°C targets with absolute reduction commitments, but delivery remains unverified.
See the breakdown →Vattenfall has cut Scope 1+2 emissions 53% since 2017 and operates 90% fossil-free generation, backed by SBTi validation.
See the breakdown →Which companies moved this week, and why.
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