Aldi has been recognized as the most budget-friendly supermarket in 2025 by consumer advocacy group Which?. Which? tracks grocery prices daily and discloses the most economical stores monthly. Aldi claimed the top spot as the cheapest supermarket for the fifth consecutive year by being the most cost-effective in ten out of the 12 months in 2025.
In December, Aldi emerged as the most economical supermarket for a selection of 68 items, with an average monthly 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’s prices in December.
Although Lidl held the title of the cheapest supermarket twice in 2025, in July and October, the average price difference for the entire year between Aldi and Lidl was merely 77p. When comparing the same set of 68 items, Asda shoppers paid an average of £134.89 in December, while Tesco Clubcard members were charged £135.84, or £139.12 without a Clubcard.
Sainsbury’s Nectar card holders spent £141.45, or £143.74 without the Nectar card, while Waitrose topped the list as the priciest supermarket for the 68-item list, costing £170.46 in December. Which? research showed that Waitrose was 35% more expensive on average compared to Aldi throughout 2025. The study also examined the cost of a larger weekly shopping list consisting of 180 items.
Aldi and Lidl were excluded from this comparison due to their smaller product offerings. For the extended list of 180 items, Asda was the most affordable in December, with an average bill of £450.82. Tesco Clubcard holders would have spent an average of £462 in December for the same items, while non-Clubcard holders paid £493.53.
Morrisons customers had a bill of £466.04 with a loyalty discount, or £467.46 without, whereas Sainsbury’s Nectar card holders paid £468.61, and non-members paid £501.89. Waitrose maintained its status as the priciest supermarket for the larger shopping list, with an average bill of £529.17. The analysis by Which? considered special offers and loyalty prices where applicable but excluded multi-buy deals.
Reena Sewraz, Which? Retail Editor, noted: “Aldi’s consistent performance demonstrates why it has retained the title of the UK’s most budget-friendly supermarket for five consecutive years. While Lidl remains a strong competitor among discount retailers, Aldi consistently offered the lowest prices overall throughout the year.
“Our analysis also highlights that Asda remains a solid choice for consumers seeking a wide range of branded products at competitive prices. With food expenses remaining a significant concern for numerous households, it pays off to compare prices – selecting one supermarket over another could result in substantial savings over a year.”