Shoppers looking to cut their grocery bills may want to take note of the latest findings from consumer group Which?. Its most recent price comparison shows that Aldi has once again been named the UK’s cheapest supermarket, with potential savings of up to £66 compared with shopping at the most expensive rival.
The analysis highlights how supermarket choice, and whether shoppers use loyalty schemes, can have a significant impact on the cost of everyday groceries.
Ranking
Aldi secured the top position after Which? compared the prices of a basket of 95 commonly bought grocery items across major UK supermarkets. The total cost at Aldi came to £163.34, making it the most affordable option for the month.
Lidl followed closely behind. Without loyalty discounts, Lidl’s basket cost £164.92, just £1.58 more than Aldi. When Lidl’s rewards app, Lidl Plus, was applied, the total fell slightly to £164.79, narrowing the gap to just £1.45.
The results reinforce the continued competitiveness of the discount retailers, particularly during a period when many households remain sensitive to food prices.
Loyalty
Which? also examined how loyalty schemes affect prices at the UK’s larger supermarkets. The findings show that discounts tied to loyalty cards can significantly change where supermarkets rank.
During June, Sainsbury’s Nectar prices allowed it to undercut Tesco. With 27 loyalty discounts applied, Sainsbury’s total came to £193.30. Tesco’s Clubcard pricing was slightly higher at £194.67.
However, the picture changed sharply for shoppers without loyalty cards. Sainsbury’s non-member total rose to £203.83, making it one of the more expensive options overall.
Comparison
Asda placed fourth in the ranking, with a basket total of £190.39. Morrisons also performed relatively well, with prices of £198.53 without its More card and £198.41 when loyalty discounts were applied.
Both Morrisons and Asda were cheaper than standard, non-loyalty prices at Tesco (£200.63) and Sainsbury’s (£203.83).
At the top end of the scale, Waitrose remained the most expensive supermarket by a wide margin. Its basket cost £229.88, which is 40.73 per cent more than Aldi for the same items.
Basket
The 95-item basket used in the comparison included a mix of own-brand and branded products to reflect a typical household shop. Items ranged from everyday staples to well-known brands such as Birds Eye peas, Cathedral City cheddar, and Kellogg’s Corn Flakes.
By using identical items across all supermarkets, Which? aimed to provide a clear and fair comparison of prices.
Insight
Reena Sewraz, Retail Editor at Which?, said households remain concerned about food prices, even as inflation has shown signs of stabilising.
She noted that discount supermarkets continue to offer the lowest prices for everyday essentials. At the same time, she highlighted the growing divide between loyalty and non-loyalty pricing at larger chains, describing it as a system that increasingly puts the best value behind digital membership schemes.
Her comments suggest that switching supermarkets, or simply remembering to use a loyalty card, can still be one of the quickest ways for shoppers to reduce their weekly grocery spending.
Prices
Below is the full list of cheapest supermarkets for June 2026, based on the 95-item basket:
| Supermarket | Basket total |
|---|---|
| Aldi | £163.34 |
| Lidl (with Lidl Plus) | £164.79 |
| Lidl | £164.92 |
| Asda | £190.39 |
| Sainsbury’s (with Nectar) | £193.30 |
| Tesco (with Clubcard) | £194.67 |
| Morrisons (with More) | £198.41 |
| Morrisons | £198.53 |
| Tesco | £200.63 |
| Sainsbury’s | £203.83 |
| Ocado | £214.72 |
| Waitrose | £229.88 |
For shoppers willing to change where they buy their groceries, the difference between the cheapest and most expensive supermarkets remains substantial. As these figures show, supermarket choice continues to play a major role in household budgets.
FAQs
Which supermarket was cheapest overall?
Aldi topped the list with a basket total of £163.34.
How close was Lidl to Aldi?
Lidl was £1.58 more, or £1.45 with Lidl Plus.
Do loyalty cards make a difference?
Yes, they can lower prices by several pounds.
Which supermarket was most expensive?
Waitrose, with a basket total of £229.88.
