TSB has achieved meaningful operational carbon cuts through renewable electricity switching but lacks quantified financed emissions disclosure for its £36B lending book. Critical gaps: no validated science-based targets (SBTi commitment unvalidated after 4+ years), no biodiversity strategy, and minimal transparency on supply chain emissions. A 2024 FCA fine for customer harm compounds the weak sustainability posture.
Same formula for every company. No curve. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleStrongest on Energy Source and Controversies & Red Flags (6/10, 6/10). Weakest on Nature & Biodiversity Impact and Targets & Commitments (2/10, 3/10).
5 sources used in this assessment. All publicly available. Each row shows which rubric questions it informed.
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Among the 27 major financial services / banking brands we've scored, TSB Bank sits 10th of 27.
Score history begins 6 April 2026.
As TSB Bank's score updates, the trajectory will appear here.
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TSB Bank is a UK retail bank founded in 2013, headquartered in London. It operates a branch network and digital banking services for UK consumers, with no investment banking or corporate lending divisions. TSB holds approximately £36B in customer lending, primarily residential mortgages. It is the 5th-largest mortgage lender in the UK by market share.
UK retail & investment bank with larger financed emissions exposure and more advanced decarbonisation roadmap
View breakdown →UK retail banking peer with mortgage-heavy portfolio and comparable operational carbon intensity
View breakdown →UK retail bank facing similar transition pressures on residential lending decarbonisation and weak biodiversity disclosure
View breakdown →Ethical banking alternative with transparent climate targeting and financed emissions reporting standards
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