Aldi has been recognized as the most affordable supermarket in 2025 by consumer advocacy group Which?. The organization monitors grocery prices daily and unveils the most budget-friendly stores monthly. Aldi emerged as the least expensive supermarket in ten out of twelve months last year, solidifying its status as the UK’s most economical supermarket for the fifth consecutive year.
In December, Aldi topped the list for a set of 68 items, with an average monthly cost of £123.60. Lidl followed closely behind, trailing by just 10p with an average cost of £123.70 for both Lidl Plus members and non-members during the same period. Lidl claimed the title of the cheapest supermarket twice in 2025, specifically in July and October, with a mere 77p average monthly price difference from Aldi throughout the year.
Conversely, for the same 68 items at Asda, the average expenditure in December was £134.89, while Tesco Clubcard members paid £135.84 and non-members shelled out £139.12. Sainsbury’s Nectar cardholders spent £141.45, or £143.74 without the Nectar card, while Waitrose emerged as the priciest supermarket for the 68-item list, totaling £170.46 in December.
Which? research indicated that Waitrose cost on average 35% more than Aldi throughout 2025. Additionally, Which? conducted a comparison based on a larger weekly shopping list of 180 items. Aldi and Lidl were not part of this comparison due to their narrower product range. Asda claimed the lowest spot in December for the larger list, with an average bill of £450.82.
According to Which?, Tesco Clubcard holders would have paid £462 on average in December for the 180-item list, while non-Clubcard holders would have spent £493.53. Morrisons customers saw a bill of £466.04 with a loyalty discount or £467.46 without, while Sainsbury’s Nectar cardholders paid £468.61, and non-members paid £501.89.
Waitrose retained its position as the most expensive supermarket for the larger shopping list, with an average bill of £529.17. The analysis by Which? considered special offers and loyalty prices but excluded multi-buy promotions.
Reena Sewraz, Which? Retail Editor, commented on Aldi’s consistent performance, emphasizing its fifth consecutive win as the UK’s most affordable supermarket. Sewraz also highlighted Asda as a strong choice for shoppers seeking a wider range of branded goods at competitive prices.
In a statement, Sewraz encouraged consumers to compare prices across supermarkets as the potential savings could amount to hundreds of pounds annually, especially considering the ongoing concern of high food expenses for many households.