The discount supermarkets: Aldi and Lidl

Aldi and Lidl consistently come out cheapest in independent price comparisons. Research by consumer organisations regularly shows a typical basket costing 20-30% less at these stores compared with Tesco, Sainsbury's or Waitrose.

Both have significantly expanded their UK presence and product ranges. Own-brand equivalents to branded products are widely available, and fresh produce quality is generally comparable with the major supermarkets.

Budget vs mid-range vs premium

Asda tends to be the cheapest of the major four (Tesco, Sainsbury's, Asda, Morrisons). Tesco and Sainsbury's sit in the middle, with Waitrose and M&S at the premium end.

Own-brand and value ranges at any major supermarket can be competitive with branded items at a discount store. The real savings come from switching both the store and product tier.

Loyalty schemes and price matching

Tesco Clubcard and Sainsbury's Nectar prices can significantly reduce costs for loyalty members — sometimes bringing prices in line with or below Aldi and Lidl on specific items. These are targeted offers, so they require actively using the app.

Price match schemes at major supermarkets compare against competitors on specific branded items. They are useful but do not replicate the full savings available from switching store.

Practical switching tips

You do not have to switch entirely. A common approach is to buy staples, own-brand products and fresh produce at Aldi or Lidl, and specific branded items you prefer at your main supermarket.

Online shopping with a set list reduces impulse purchases and makes it easier to compare prices and stick to your budget. Most major supermarkets offer delivery or click-and-collect.