Aldi has been recognized as the most affordable supermarket in 2025 by consumer advocates at Which?. Which? regularly monitors grocery prices and identifies the most budget-friendly stores on a monthly basis. Throughout 2025, Aldi maintained its status as the UK’s most economical supermarket by claiming the top spot in ten out of 12 months.
In December, Aldi emerged as the cheapest supermarket for a selection of 68 items, with a monthly average cost of £123.60. Lidl followed closely in second place, with an average cost of £123.70 for both Lidl Plus members and non-members, just 10p more than Aldi.
Lidl held the title of the cheapest supermarket twice in 2025, in July and October, with an average price difference of only 77p per month compared to Aldi. Asda, on the other hand, had an average cost of £134.89 in December for the same 68 items, while Tesco Clubcard members paid £135.84 or £139.12 without a Clubcard.
Nectar card holders at Sainsbury’s spent £141.45 or £143.74 without a Nectar card in December, whereas Waitrose topped the list as the most expensive supermarket with a total of £170.46 for the 68 items. Which? research indicated that Waitrose’s prices were 35% higher on average than Aldi’s throughout 2025.
Aldi and Lidl were excluded from a comparison of a larger weekly shopping list of 180 items due to their smaller product range. In December, Asda offered the best prices for the larger list, totaling £450.82, while Tesco Clubcard holders paid £462 on average and non-Clubcard holders paid £493.53.
Morrisons shoppers had a bill of £466.04 with a loyalty discount or £467.46 without, while Sainsbury’s Nectar card holders paid £468.61, and non-members paid £501.89. Waitrose remained the most expensive for the larger shopping list, with an average bill of £529.17. The analysis by Which? included special offers and loyalty prices but excluded multi-buy discounts.
Reena Sewraz, Which? Retail Editor, emphasized Aldi’s consistent affordability, securing its position as the UK’s cheapest supermarket for five consecutive years. She highlighted that Asda remains a strong option for those seeking a wide range of branded products at competitive prices.
In a time where food expenses are a significant concern for many households, the importance of comparing prices among supermarkets was emphasized. Choosing a more cost-effective supermarket could potentially save consumers hundreds of pounds annually.