Serco sustainability score: 53/100
Serco is a UK-listed facilities and support-services company running government contracts in defence, justice and immigration, transport, health and citizen services across the UK, North America, Asia-Pacific and Middle East. Revenue £4.9bn and 47,663 employees in 2025.
More about Serco
Listed on London Stock Exchange.
Founded 1986Head office United KingdomStaff ~47,663 (2025)Revenue £4,876.8M revenue (FY ended 31 Dec 2025)Website ↗
Serco has cut its Scope 1 and 2 emissions 32% since 2022, but its supply-chain emissions rose 6% in the latest year, offsetting that progress. Supplier engagement lags: only 10% of suppliers by emissions hold science-based targets, against a 95% target by 2028. Water and waste data are absent from public reporting.
Serco scores 53/100 (Making progress) 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 November 2026.
That places Serco joint 89th of 951 companies scored, and joint 1st of 5 in Facilities & Support Services.
What is Serco doing well, and where does it fall short?
Strongest on Carbon Footprint: Operations and Targets & Commitments (9/10, 8/10). Weakest on Water Impact and Resource Use & Waste (2/10, 3/10).
Where Serco lost points
For each question that lost points, the evidence our public rubric looks for that we didn't find.
- Emissions from its own operations9/10No verified figures published with their method and a falling trend.
- 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 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 waste3/10No active waste reduction, reuse or repair shown.
- Its effect on water2/10No monitoring of water use, or no measures to reduce it.
- Its climate targets8/10No validated long-term net zero target.
- How openly it reports8/10No mission-locked structure, such as B Corp certification.
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 Serco's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleWhat evidence is Serco's score based on?
8 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
13% of them were published by Serco itself; the rest come from independent sources.
“Accenture provide independent, reasonable assurance over our Environmental KPIs in accordance with ISO 14064-3:2019”
“Serco Group ple Annual Report and Accounts 2025”
“Serco Group plc commits to reach net-zero greenhouse gas emissions across the value chain by FY2050.”
“Serco has today launched a new Net Zero Standard for its suppliers”
“SFO Deferred Prosecution Agreement with Serco”
“the SBTi has approved our targets, and classed our target ambition as in line with a 1.5°C trajectory”
“SGL will pay a fine of £19.2m together with £3.7m related to the SFO's investigation cost.”
“has taken responsibility for three offences of fraud and two of false accounting committed between 2010 and 2013”
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How does Serco compare with other facilities & support services companies?
Serco shares top spot among facilities & support services peers.
Among the 5 major facilities & support services brands we've scored, Serco is tied =1st of 5, with 1 other.
Who comes next in Facilities & Support Services?
Serco leads its sector. These are the next 3 down.
Mitie has cut operational emissions over two years but weakened its climate targets after the Marlowe acquisition, switching from absolute to intensity-based goals and cutting Scope 3 reduction from 80% to 50%.
See the breakdown →Bidvest Noonan reports comprehensive Scope 1, 2 and 3 emissions with external ISO 14064-3 verification, but UK absolute emissions rose 47% from FY2023 to FY2025.
See the breakdown →ISS UK's emissions figures are a revenue-based share of a UK group total, and its direct emissions rose 26% in the latest year.
See the breakdown →Which companies moved this week, and why.
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