Monzo is a UK-based digital bank founded in 2010, offering mobile-first current accounts and financial services.
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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. Fees pay for the review, never the result. Last verified May 2026.
That places Monzo Bank joint 217th of 847 companies scored, and 9th of 51 in Financial Services / Banking.
Where Monzo Bank sits among financial services / banking peers.
Among the 51 major financial services / banking brands we've scored, Monzo Bank sits 9th of 51.
Its three lowest-scoring questions, and what the evidence didn't show.
Customer intensity fell 10% but absolute emissions doubled over six years from FY2019 baseline (12,970 tCO2e).
No biodiversity policy, TNFD disclosure, or formal nature impact assessment.
No water consumption data published.
A score changes when the evidence does. We use new published evidence at the next rescore. Evidence that isn't public can count through an evidence review.
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Get in touch →Strongest on Energy Source and Controversies & Red Flags (7/10, 7/10). Weakest on Emissions Trajectory and Nature & Biodiversity Impact (2/10, 3/10).
The 3 companies in the sector scoring nearest above Monzo Bank.
Visa operates a global payments duopoly enabling fossil-fuel commerce at scale without restriction, despite having SBTi-approved climate targets and 100% renewable electricity.
See the breakdown →PayPal has delivered real operational emissions cuts—79% reduction since 2019—and maintains 100% renewable energy for data centres.
See the breakdown →Nationwide has decarbonised operations effectively (Scope 1 down 45%), secured 100% renewable electricity, and published robust TCFD disclosures with third-party assurance.
See the breakdown →The formula and all 6 sources.
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × Scale6 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
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.
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.
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