J Sainsbury scores 5 points higher than Tesco on SINK's sustainability index.
J Sainsbury is more sustainable according to SINK's open sustainability index, scoring 43/100 vs Tesco's 38/100 — a difference of 5 points.
Tesco scores 38/100 on the SINK sustainability index (Below expectations). 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.
J Sainsbury scores 43/100 on the SINK sustainability index (Below expectations). Sainsbury's has cut operational emissions 53% since 2018 and achieved 100% renewable electricity, but Scope 3 emissions—98% of total—are flat. Supply chain decarbonization is stalled despite SBTi targets. Plastic reduction fell short of 2025 goals. Nature commitments remain largely unverified.
Both companies are rated on the same 10-question SINK rubric: Scope 1/2/3 carbon footprint, energy source, nature and biodiversity, resource use, water, emissions trajectory, science-based targets, transparency, and controversies. Scores are 0–100, based on public data, and fully reproducible.
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