Monzo Bank sustainability score: 47/100
Better than 80% of Financial Services / Banking
Leading practice starts at 60. The highest score on SINK is 71.
Monzo is a UK-based digital bank founded in 2010, offering mobile-first current accounts and financial services. As a fintech lender and payments processor, it holds significant customer deposits and payment data but operates with minimal physical infrastructure compared to traditional banks.
Founded 2010Head office United Kingdom, United KingdomStaff ~3,800Revenue ~£1.2BWebsite ↗
Monzo reports comprehensive carbon data but absolute emissions rose 17% year-on-year, undermining its net zero 2030 claim. Financed emissions—critical for banks—are entirely absent. The company lacks third-party verification, SBTi validation, and a formal sustainability report despite holding £16.6B in deposits.
Monzo Bank scores 47/100 (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 May 2026.
That places Monzo Bank joint 236th of 1,023 companies scored, and 13th of 61 in Financial Services / Banking.
Limited evidence. This score rests on 6 sources, 33% of them published by the company itself. Every source cited here passed the same quality checks as any other score: all live, none from data aggregators. There is simply less of it.
What is Monzo Bank doing well, and where does it fall short?
Strongest on Energy Source and Controversies & Red Flags (7/10, 7/10). Weakest on Emissions Trajectory and Nature & Biodiversity Impact (2/10, 3/10).
Where Monzo Bank 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 natureAssess its effect on nature and publish a basic environmental policy.
- Its effect on waterMonitor its water use and take measures to reduce it.
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 chain5/10Most of its supply-chain (Scope 3) emissions aren't measured.
- Whether its emissions are falling2/10No evidence its emissions are falling.
- How clean its energy is7/10Less than 90% of its energy shown to be renewable.
- Its effect on nature3/10No assessment of its effect on nature, and no basic environmental policy.
- How it uses materials and handles waste4/10No measurable waste or recycling targets reported publicly.
- Its effect on water3/10No monitoring of water use, or no measures to reduce it.
- Its climate targets3/10No specific targets with dates.
- How openly it reports5/10No dedicated sustainability role, board oversight or public report.
- Its record on controversies7/10Points 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 Monzo Bank's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleWhat evidence is Monzo Bank's score based on?
6 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
33% of them were published by Monzo Bank 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.
This company's public sustainability disclosure is limited. This score is based on the 6 verified sources cited below, rather than padded to a standard count.
Limited data coverage. This assessment is based on 6 sources, 33% of which are self-reported by the company. Scores may change as independent evidence becomes available.
If you believe a source has been misread or a newer version exists, submit a challenge.
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How does Monzo Bank compare with other financial services / banking companies?
Where Monzo Bank sits among financial services / banking peers.
Among the 61 major financial services / banking brands we've scored, Monzo Bank sits 13th of 61.
Who scores higher in Financial Services / Banking?
The 3 companies in the sector scoring nearest above Monzo Bank.
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