- Consumer champion Which? has named Aldi the UK’s cheapest supermarket for September, extending its run to 11 consecutive months and maintaining its 100% record in 2026
- The price advantage between Aldi and rival supermarkets has grown by over 26% since January, with average monthly savings now reaching £38.57[1]
- Shoppers choosing Aldi over average rival supermarkets have saved over £330 so far this year – rising to over £2,000 compared to the highest-priced retailer[2]
Families feeling the squeeze on household budgets shouldn’t have to cut back on the things they enjoy, according to Aldi, as new data from Which? reveals how much shoppers can save simply by changing where they buy their groceries.
The latest analysis from consumer champion Which? has once again named Aldi the UK’s cheapest supermarket for September 2026, based on a basket of 93 popular everyday items priced at £159.48.
The findings show that the price gap between Aldi and its competitors continues to widen significantly. In January, rival supermarkets were an average of £30.51 (18.5%) more expensive. By September, that gap grew to £38.57 (24.2%) – meaning shoppers could have kept £333.82 in their bank accounts over the last nine months just by shopping at Aldi over an average rival supermarket.
Even when compared directly against major traditional retailers with loyalty schemes applied, the savings remain substantial:
- Tesco (incl. loyalty discount) was £28.23 more expensive
- Sainsbury’s (incl. loyalty discount) was £29.47 more expensive
- Morrisons (incl. loyalty discount) was £33.45 more expensive
- Waitrose was £63.90 more expensive
With autumn bringing increased pressure from household energy bills, alongside spending on family activities, children’s hobbies, social occasions and preparations for Christmas, Aldi is reminding consumers that cutting costs doesn’t have to mean sacrificing life’s everyday pleasures.
The September result marks Aldi’s eleventh consecutive month as Which?’s cheapest supermarket, continuing an unbeaten run throughout 2026 after being named Which? Cheapest Supermarket of the Year for 2025[3] and Best Value Brand of the Year[4].
Julie Ashfield, Chief Commercial Officer at Aldi UK, said: “Families shouldn’t have to make sacrifices to the activities, treats, or hobbies they enjoy just because everyday household budgets are under pressure. The latest Which? data clearly demonstrates that shoppers can make substantial, ongoing savings simply by changing where they do their weekly shop.
“As the price gap between Aldi and traditional supermarkets continues to grow, that’s extra cash staying directly in customer pockets for days out, family treats, or saving towards Christmas. Shoppers don’t need to change their lifestyle to save money – they just need to change their supermarket.”
Reena Sewraz, Which? Retail Editor said: “With energy bills a major concern as the cold weather approaches, many households will be looking for ways to trim the cost of their food shop.
A £60 mark-up on everyday groceries is a steep price to pay for store loyalty. September’s analysis proves once again that the discounters are the place to go to save – and when the cost gap is that wide, switching where you shop remains the quickest way to cut your grocery bill.”
The full September results are below:
Retailer | Average price for 93 items |
Aldi | £159.48 |
Lidl (incl. loyalty discount) | £161.48 |
Lidl | £161.84 |
Asda | £186.71 |
Tesco (incl. loyalty discount) | £187.71 |
Sainsbury’s (incl. loyalty discount) | £188.95 |
Morrisons (incl. loyalty discount) | £192.93 |
Morrisons | £193.13 |
Tesco | £193.45 |
Sainsbury’s | £195.01 |
Ocado | £208.64 |
Waitrose | £223.38 |
