Aldi has been recognized as the most economical supermarket in 2025 by consumer advocates at Which?. Which? monitors grocery prices daily and highlights the most budget-friendly stores each month. Aldi claimed the title of the cheapest supermarket in ten out of 12 months in 2025, solidifying its position as the UK’s most affordable supermarket for the fifth consecutive year.
In December, Aldi emerged as the most cost-effective supermarket for a range of 68 items, with an average monthly cost of £123.60. Lidl followed closely behind, in second place, with an average cost of £123.70 for both Lidl Plus members and non-members during the same month.
Throughout the previous year, Lidl held the title of the cheapest supermarket twice, in July and October, with just a 77p average monthly price gap compared to Aldi.
For the identical set of 68 items, Asda’s average cost in December was £134.89, while Tesco Clubcard holders paid £135.84, or £139.12 without a Clubcard.
Meanwhile, Sainsbury’s Nectar cardholders spent £141.45, or £143.74 without a Nectar card. Waitrose stood out as the priciest supermarket for the same 68-item list, with a total of £170.46 in December.
Which? research uncovered that Waitrose’s prices were on average 35% higher than Aldi’s throughout 2025. Additionally, Which? compared the expenses of a larger weekly shopping list comprising 180 items.
Aldi and Lidl were excluded from the larger comparison due to their narrower product ranges. For the 180-item list, Asda emerged as the most economical option in December, with an average expenditure of £450.82.
According to Which?, Tesco Clubcard holders 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. Sainsbury’s Nectar cardholders spent £468.61, while non-members paid £501.89.
Waitrose topped the list as the most expensive supermarket for the larger shopping list, averaging a bill of £529.17. The analysis by Which? took into account special offers and loyalty prices where applicable but excluded multi-buy deals.
Reena Sewraz, Which? Retail Editor, remarked, “Aldi’s consistent performance underscores why it has been named the UK’s cheapest supermarket for the fifth consecutive year.” She also highlighted Lidl as a strong contender among discounters but noted Aldi’s dominance in offering the most competitive prices overall.
In conclusion, as food expenses remain a significant concern for many households, the advice is to compare prices diligently as opting for one supermarket over another could lead to substantial savings over a year.