Tesco scores 38/100 (Below expectations) on SINK's independent climate assessment — scored from public data only, no company payment can change a number. Last verified October 2026.
That places Tesco joint 388th of 790 companies scored, and joint 24th of 46 in Retail (non-fashion).
Tesco has credible operational decarbonization (65% Scope 1+2 reduction, 100% renewable electricity) but supply chain emissions—98% of its footprint—remain largely unquantified and unverified. Material failures persist: deforestation pledges broken, River Wye pollution linked to its chicken supply chain, ASA ruling on greenwashing, and alleged suppression of critical WWF reporting.
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Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleStrongest on Carbon Footprint — Operations and Energy Source (8/10, 7/10). Weakest on Water Impact and Nature & Biodiversity Impact (4/10, 4/10).
12 sources used in this assessment. All publicly available. Each row shows which rubric questions it informed.
7 of 12 sources are third-party verified or public record.
“Scope 1 emissions 802,425 tonnes; Scope 2 market-based 5,497 tonnes of CO₂e”
“Scope 1 (tonnes of CO2e) 802,425; Scope 2(a) Market-based method (tonnes of CO2e) 5,497”
“73.1 million tCO2e/year reported in 2024/25”
“100% of electricity came from renewable sources”
“selected-data limited assurance by Deloitte LLP”
“Tesco focused its TNFD LEAP assessment on the business' palm oil supply chain”
“Tesco has been accused of greenwashing after selling Brazilian meat despite promising to ban it over deforestation”
“Illegal deforestation and forest fires in the Amazon are linked to its chicken and pork production”
“PPAs will cover 45% of Tesco UK's electricity demand or 36% of the Group's expected 2030 electricity demand”
“The agreement, facilitated by EDF, secures 65% of the solar power generated from the Cleve Hill Solar Park”
“a significant factor in the increase in poultry production in the region after 2018 was in order to meet the chicken meat demands of Tesco”
“In the Tesco case, the complaints were upheld — ASA held that specific advertisements breached BCAP and CAP Code rules on environmental claims”
If you believe a source has been misread or a newer version exists, submit a challenge.
Where Tesco sits among retail (non-fashion) peers.
Among the 46 major retail (non-fashion) brands we've scored, Tesco is tied =24th of 46, with 2 others.
Score history begins 29 May 2026.
As Tesco's score updates, the trajectory will appear here.
This score is not currently being contested.
Every challenge is published. We'd rather be corrected than wrong — that's the whole point.
No challenges submitted yet. If you have evidence that contradicts this score, you can challenge any question above — cite a public source and we'll review it.
Tesco is the UK's largest grocery retailer, operating over 3,400 stores across the UK and Ireland. Founded in 1919 and headquartered in Welwyn Garden City, it generates £54bn+ annual revenue and employs 423,000 people. It is a conventional public limited company with extensive exposure to agricultural supply chain risks.
Largest retailer globally; similar supply chain scope and deforestation exposure in commodities.
View breakdown →FMCG peer; comparable Scope 3 footprint dominance and agricultural supply chain risk.
View breakdown →Food-beverage sector; comparable nature and deforestation risk across commodity supply chain.
View breakdown →UK grocery competitor; similar scale, supply chain structure, and regulatory oversight.
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