New data has definitively identified the UK's most affordable supermarket, revealing that savvy shoppers can save a substantial £28 per weekly shop compared to some of the nation's larger chains. The latest research from consumer champion Which? shows that Aldi has emerged as Britain's cheapest supermarket for a standard basket of groceries, cementing its reputation for delivering significant value.
Substantial Savings for Household Budgets
Deciding where to complete your weekly grocery shop can have a far more profound impact on household finances than many consumers realise. The pricing difference between supermarkets, when calculated over an entire year, can amount to considerable savings for families actively seeking to reduce their daily living expenses. This ongoing financial pressure makes the choice of retailer increasingly critical.
Which? Research Methodology and Findings
The comprehensive new study from Which? analysed the cost of 89 common grocery products throughout February. Aldi provided the cheapest total at just £161.56 for this basket of everyday essentials. This figure was narrowly followed by fellow discount chain Lidl, which came in at £162.75. These two budget supermarkets remain considerably more affordable than their bigger, traditional rivals.
When comparing the identical trolley of goods, purchasing at Sainsbury's costs shoppers £27.62 more. The price differential becomes even more stark at the premium end of the market, with customers spending an additional £55.46 at Waitrose for the same selection of items. Over time, these weekly differences translate into hundreds of pounds in annual savings.
Aldi's Consistent Value Leadership
Aldi has recently secured Which?'s prestigious Cheapest Supermarket of the Year award for 2025 and led the consumer organisation's affordability rankings once more in January. This latest data for February further cements the discounter's standing for reliably low pricing and value leadership in the highly competitive UK grocery sector.
Julie Ashfield, Chief Commercial Officer at Aldi UK, commented on the findings: "These results demonstrate that shoppers do not need to look beyond our shores to make real savings on their essential weekly shop. With Aldi topping the Which? charts once again, UK households can confidently stretch their budgets further every single week—potentially saving enough over time to treat themselves to a well-deserved holiday."
Detailed Supermarket Price Comparison
The research provides a clear hierarchy of grocery costs across the UK's major retailers. Among the other mid-tier supermarkets, Asda's basket total came in at £181.06. Tesco reached £181.58 when its popular Clubcard loyalty discount was applied, though this amount rises to £185.93 without those reductions. Morrisons was priced at £185.49, positioning it in a comparable price bracket.
Meanwhile, Sainsbury's costs £186.21 with its Nectar loyalty programme taken into account, climbing to £189.18 without it. At the premium end of the spectrum, Ocado stands at £203.59, whilst Waitrose is the most costly overall, at £217.02 for the identical shopping basket of 89 products.
Price Rankings for 89-Item Trolley
- Aldi: £161.56
- Lidl: £162.75
- Asda: £181.06
- Tesco (with loyalty discount): £181.58
- Morrisons: £185.49
- Tesco (without discount): £185.93
- Sainsbury’s (with loyalty discount): £186.21
- Sainsbury's (without discount): £189.18
- Ocado: £203.59
- Waitrose: £217.02
The data underscores a clear and persistent divide in the UK grocery market, with discounters Aldi and Lidl maintaining a significant price advantage over traditional full-range supermarkets. For cost-conscious consumers, the choice of where to shop continues to have direct and measurable consequences for their household budgets.
