Aldi has been recognized as the most affordable supermarket in 2025 according to Which?, a consumer advocacy group. Which? regularly monitors grocery prices and identifies the most budget-friendly stores each month. Aldi claimed the top spot as the cheapest supermarket for ten out of 12 months in 2025, solidifying its position as the UK’s most economical supermarket for the fifth consecutive year.
In December, Aldi emerged as the most cost-effective option for a selection of 68 items, with an average monthly cost of £123.60. Lidl followed closely behind, costing just 10p more at £123.70 on average for both Lidl Plus members and non-members in December.
Throughout the year, Lidl held the title of the cheapest supermarket twice, in July and October. The average monthly price difference between Aldi and Lidl for the entire year was a mere 77p.
For the same set of 68 items, Asda shoppers spent an average of £134.89 in December, while Tesco Clubcard members paid £135.84, or £139.12 without a Clubcard.
Sainsbury’s Nectar card holders shelled out £141.45, or £143.74 without the card, while Waitrose topped the list as the most expensive supermarket for the 68-item list, costing £170.46 in December.
Which? research indicated that Waitrose was on average 35% pricier than Aldi throughout 2025. The comparison also extended to a larger weekly shopping list consisting of 180 items. Aldi and Lidl were not part of this comparison due to their smaller product range.
In December, Asda emerged as the most economical choice for the larger list of 180 items, with an average bill of £450.82. Tesco Clubcard holders spent £462 on average, while non-Clubcard holders paid £493.53 for the same items.
Morrisons customers saw a bill of £466.04 with loyalty discounts or £467.46 without, while Sainsbury’s Nectar card holders paid £468.61, compared to £501.89 for non-cardholders. Waitrose remained the priciest option for the larger shopping list, with an average bill of £529.17.
Reena Sewraz, the Retail Editor at Which?, praised Aldi for maintaining its position as the UK’s most affordable supermarket for five consecutive years. She highlighted Aldi’s consistent low prices and emphasized the importance of comparing prices to save money on groceries.
The analysis emphasized the significance of choosing the right supermarket, as the cost difference could result in significant savings over the year for households concerned about their food bills.