Mitie sustainability score: 53/100
Leading practice starts at 60. The highest score on SINK is 71.
Mitie is a UK-listed facilities management and support services company operating across commercial cleaning, building services, technical services and workforce provision. With ~81,000 employees and £5.6bn revenue, it is a major integrated FM player serving corporate and public-sector clients.
More about Mitie
The current company was incorporated in 1936; the Mitie business dates from 1987. It has agreed to be acquired by OCS (2026).
Founded 1936Head office London, United KingdomStaff ~81,115Revenue £5,618.6M (FY2026, year to 31 Mar 2026)Website ↗
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%. Fleet electrification is substantial at 76%, offset by reliance on REGOs and carbon credits. Supply chain mapping remains patchy; nature and water disclosure are minimal.
Mitie scores 53/100 (Making progress) 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 October 2026.
That places Mitie joint 86th of 1,023 companies scored, and joint 1st of 5 in Facilities & Support Services.
What is Mitie doing well, and where does it fall short?
Strongest on Carbon Footprint: Operations and Transparency & Accountability (8/10, 8/10). Weakest on Emissions Trajectory and Nature & Biodiversity Impact (4/10, 4/10).
Where Mitie 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 a year-on-year fall in its total emissions.
- Its effect on natureMeasure its effect on nature and have it independently verified.
- Its effect on waterMeasure its water footprint and set reduction targets.
Every question that lost points
- Emissions from its own operations8/10No verified figures published with their method and a falling trend.
- 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 is5/10Less than half its energy shown to be renewable, or no transition plan.
- Its effect on nature4/10Its effect on nature isn't measured or independently verified.
- How it uses materials and handles waste5/10No measurable waste or recycling targets reported publicly.
- Its effect on water4/10No measured water footprint with reduction targets.
- Its climate targets5/10Its targets aren't science-based or committed to the Science Based Targets initiative.
- 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 Mitie's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleWhat evidence is Mitie's score based on?
13 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
38% of them were published by Mitie itself; the rest come from independent sources.
8 of 13 sources are independent of the company.
“global carbon emissions (tonnes CO2e), net of 6,778 carbon credits”
“Our absolute Scope 1 and 2 emissions (location-based) for Mitie, excluding Marlowe, reduced by 6% in FY26 to 18,992 tCO2e.”
“Scope 3 emissions also saw a 7% reduction, to 254,355 tCOe”
“We commit to a circular economy, protecting biodiversity”
“% of Preferred Supplier List with carbon targets based in science* 35% 24%”
“Mitie has joined the Aldersgate Group, the alliance to drive action for a sustainable economy”
“our ambitious emissions reduction plans have been validated by the Science Based Targets initiative (SBTi)”
“Mitie becoming one of only 219 companies globally to have received validation from the SBTi for its carbon reduction targets”
“The facilities management group has signed up to the RE100 initiative, committing to use only renewable energy across all its sites.”
“which includes a commitment to fully electrifying its fleet by the end of 2025.”
“Mitie has deployed its 5,000 electric vehicle just two months after passing the 4,000 EV milestone.”
“committing to transition its fleet of 5,300 vehicles to electric by 2030”
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How does Mitie compare with other facilities & support services companies?
Mitie shares top spot among facilities & support services peers.
Among the 5 major facilities & support services brands we've scored, Mitie is tied =1st of 5, with 1 other.
Who comes next in Facilities & Support Services?
Mitie leads its sector. These are the next 3 down.
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.
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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