Asda was the cheapest supermarket for our basket of shopping by almost £20, in September.
The supermarket continues its run of form and was once again cheapest for our comparison basket in the last month.
Asda charged an average £183.88 for the basket, compared with Waitrose who charged £203.14. We also compared the prices of Ocado, Tesco and Waitrose.
To find out how the other supermarkets fared in this month’s comparison and over the last year log into our supermarket prices compared page. If you’re not already a Which? member, you can get instant access with a £1 one-month trial.
Our basket includes the average price of between 80 and 100 products from big brands. It includes a range of everyday items from bread to shaving foam. In order to work out the average price of our basket we used data from the independent shopping website Mysupermarket.
Morrisons starts price comparison
Morrisons announced this month that it will start price matching against discounters Aldi and Lidl, as well as Tesco, Sainbury’s and Asda.
It will use its new Match & more loyalty card to give shoppers points if their shop would have been cheaper elsewhere. It has launched in 11 stores and will be across the whole chain by Christmas.
Sainsbury’s has tweaked its brand match price comparison so that it now only price matches against Asda.
Supermarket price comparison schemes
Most supermarkets have a price comparison scheme, which means that if some or all of your shopping would have been cheaper at another supermarket you may be offered a voucher for the difference.
Though as with Sainsbury’s and Morrisons the supermarkets they check against, the products they include and the terms can differ.
At Which? we survey more than 10,000 people each year to discover how customers rate their supermarket for everything from customer service to value for money and look at both in store and online experiences. You can find out how the major supermarkets shaped up in our survey.