The consumer experts’ monthly analysis for a basket of 82 essential items revealed that the total price of a shop at the discount retailer came in at £21.23 less than Morrisons, as well as being cheaper than Sainsbury’s by £20.11, and less expensive than Tesco by £16.87.
Even when using a Clubcard or Nectar Card – Aldi was still the cheapest.
The Which? research said shoppers could have saved almost £2,000 by choosing Aldi over Waitrose over the past year.
The full May 2025 results are below:
- Aldi £135.48
- Lidl (inc loyalty discount) £135.79
- Lidl £135.82
- Asda £149.94
- Tesco (inc loyalty discount) £150.26
- Sainsbury’s (inc loyalty discount) £151.82
- Tesco £152.35
- Sainsbury’s £155.59
- Morrisons (inc loyalty discount) £155.76
- Morrisons £156.71
- Ocado £168.48
- Waitrose £184.03
Supermarket prices are now 3.5% higher than a year ago, up from 3.3% in February after falling from 3.7% in December, according to analysts Kantar.
The British Retail Consortium has said it expects food inflation to hit 4% by the second half of the year amid geopolitical tensions and a £7 billion increase in costs from the autumn Budget.
Firms across the retail sector have warned over the cost pressures of soaring staff bills after Labour announced a increase in national insurance contributions (NICs) for employers and minimum wage rise, both from April 1, in its recent Budget.
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The NICs increase is designed to help pay for improvements to public services like the NHS, but retailers have criticised it for making it more expensive to hire people.
A number of large firms, including Sainsbury’s, axed jobs in the first weeks of 2025, with some of the cuts at the supermarket understood to be linked to the increase in NICs.
Julie Ashfield, chief commercial officer at Aldi UK, says: “We are proud to retain this position of cheapest supermarket for an incredible 19th month, allowing our shoppers to save their money for other life essentials.”
