OVO Energy sustainability score: 42/100
Better than 80% of Energy Supply / Utilities
Making progress starts at 46. The highest score on SINK is 71.
OVO Energy is a UK-based energy retailer supplying gas and electricity to approximately 4 million customers. Founded in 2009 in Bristol, OVO operates as a public utility offering energy retail services.
More about OVO Energy
The company has positioned itself around climate commitments and nature initiatives but remains structurally tied to fossil gas supply.
Founded 2009Head office Bristol, UKStaff ~4,500Revenue ~£5BWebsite ↗
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. Repeated regulatory fines for customer harm and billing failures, combined with intensity-based (not absolute) renewable targets, reveal a company still far from credible decarbonisation.
OVO Energy scores 42/100 (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 May 2026.
That places OVO Energy joint 362nd of 1,023 companies scored, and 5th of 21 in Energy Supply / Utilities.
What is OVO Energy doing well, and where does it fall short?
Strongest on Carbon Footprint: Operations and Carbon Footprint: Supply Chain (7/10, 6/10). Weakest on Resource Use & Waste and Water Impact (3/10, 3/10).
Where OVO Energy 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
- How it uses materials and handles wasteShow active waste reduction, reuse or repair.
- Its effect on waterMonitor its water use and take measures to reduce it.
- Whether its emissions are fallingShow a year-on-year fall in its total emissions.
Every question that lost points
- Emissions from its own operations7/10Its 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 falling4/10No evidence of a year-on-year fall in its total emissions.
- How clean its energy is5/10Less than half its energy shown to be renewable, or no transition plan.
- Its effect on nature5/10Its 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 targets6/10Its targets aren't validated by the Science Based Targets initiative.
- How openly it reports6/10No annual impact report, or no pay linked to climate targets.
- Its record on controversies4/10Points 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 OVO Energy's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleWhat evidence is OVO Energy's score based on?
17 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
35% of them were published by OVO Energy itself; the rest come from independent sources.
Scored on 6 April 2026 under an earlier version of our method. We're re-checking it under the current method.
11 of 17 sources are independent of the company.
If you believe a source has been misread or a newer version exists, submit a challenge.
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How does OVO Energy compare with other energy supply / utilities companies?
Where OVO Energy sits among energy supply / utilities peers.
Among the 21 major energy supply / utilities brands we've scored, OVO Energy sits 5th of 21.
Who scores higher in Energy Supply / Utilities?
The 3 companies in the sector scoring nearest above OVO Energy.
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