Asda, Morrisons, Sainsbury’s and Tesco shoppers pay an average of £642 more for their weekly shop compared to Aldi, according to new analysis from Which?.

The consumer watchdog named Aldi as the UK’s cheapest supermarket of 2024 after comparing the cost of own-label and branded products at major stores in December.

Which? tracked the price of 56 groceries every day last month, including milk, Hovis bread, Birds Eye peas, baked beans and carrots, using an independent price comparison website and found Aldi to be the cheapest overall.

The total cost of 56 grocery items came to £100.29 on average at the German discounter, with shoppers having to pay more for the same shopping list elsewhere.

By comparison, Tesco shoppers pay £10.98 more on average, with the same grocery list coming to £111.22 in total with a Clubcard. At Asda, shoppers pay an average of £12.93 more, with the grocery list totalling £113.22.

At Morrisons, the cost was £13.72 more at £114.01 in total for shoppers with a More card, while at Sainsbury’s, shoppers pay £11.84 more with items totalling £112.13 with a Nectar card.

The difference in cost at each supermarket compared to Aldi means that over the course of a year, Tesco shoppers would pay £568.38 more for 52 weekly shops, Sainsbury’s shoppers would pay £615.68 more, Asda shoppers would pay £672.36 more and Morrisons shoppers would pay £713.44 more than Aldi customers.

It means that shoppers at Asda, Morrisons, Sainsbury’s and Tesco are paying an average of £642.46 more per year for groceries compared to shopping at Aldi, if prices remain at the same level.

Harry Rose, editor of Which? magazine, said: “Our research shows Aldi has retained its crown as the UK’s cheapest supermarket in 2024. After the added expense of the festive period, many households will be looking to cut costs.

“Our analysis shows that by switching supermarkets, shoppers can make significant savings, highlighting the advantages of shopping around where possible.”