Discount chain Aldi has been named the UK’s cheapest supermarket for June 2025, surpassing rival Lidl by 35p.
The recognition comes from the UK consumer group Which? after comparing the prices of 79 popular groceries from eight major supermarkets across the country.
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The group carried out a price check on a mix of branded and own-brand items, including staples such as sliced bread, milk and cheese.
Aldi topped the value chart with an average cost of £131.52 ($180.409) for the 79 items, followed closely by Lidl with Lidl Plus at £131.87 and without Lidl Plus at £131.89.
Asda, which does not offer loyalty pricing, stood at £144.82, 10% more expensive than Aldi.
Waitrose was the most expensive supermarket, averaging £178.64 – 36% more than Aldi.
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By GlobalDataWhen a larger selection of 196 items was considered, including more branded groceries, loyalty schemes presented bigger savings. Aldi and Lidl were not included in this comparison as they did not stock all the branded items.
Asda was the cheapest for the sixth consecutive month, surpassing Tesco with a Clubcard by more than £8.
Tesco was followed by Sainsbury’s with Nectar and Morrisons with More.
Waitrose was again the most expensive at £554.68, 14% more than Asda.
Loyalty cards offered an average saving of 0.02% at Lidl, 0.3% at Morrisons, 1.7% at Tesco and 3.7% at Sainsbury’s, based on a smaller product list.
However, switching to Aldi could yield even greater savings. For the larger product list, the savings were more significant – 1% at Morrisons, 7.22% at Tesco, and 7.49% at Sainsbury’s.
Despite this, shopping at Asda without a loyalty card could still be more economical.
The research also highlighted that millions of people are unable to access loyalty promotions due to eligibility restrictions, such as age, lack of address or difficulties with digital access.
Supermarkets are encouraged to ensure all groups of shoppers can access loyalty prices.
In June 2025, Aldi announced an expansion plan across the UK as part of its ongoing store opening programme, creating 1,000 in-store jobs.
