Tesco vs Sainsbury's: which is cheaper?

Two of the UK's big-four supermarkets, and on price they're close — close enough that loyalty membership and the week's promotions usually decide it. Here's what actually separates them and how to price your own basket across both.

Loyalty pricing decides a lot

Tesco Clubcard Prices and Sainsbury's Nectar Prices both give members a lower shelf price on a big chunk of the range, so the member price is usually the one that matters. That means a non-member shop and a member shop can rank differently at the same two stores on the same day. If you carry both loyalty cards, compare the member prices; if you carry neither, compare the standard ones — mixing the two is how people talk themselves into the wrong answer.

Both run Aldi Price Match

Tesco and Sainsbury's each match selected Aldi and Lidl lines on everyday essentials, which narrows the gap to the discounters on those specific items. The matched ranges don't cover everything, and the two supermarkets don't match an identical list, so on any given essential one may be matched while the other isn't — another reason the cheaper store shifts from basket to basket.

Range and quality

Both carry value, mid and premium own-label tiers — Tesco Finest and Sainsbury's Taste the Difference — alongside the full branded ranges you'd expect from either. On the whole the differences here are more about preference than price: which own-label biscuits or ready meals you like, which store is more convenient. Neither has a decisive quality edge that would settle the cost question for you.

Which is cheaper for your shop?

It depends on your basket and whether you use the loyalty cards. A shop that leans on Clubcard or Nectar deals points one way; a shop full of items neither has on offer points another. Promotions and price-match ranges rotate week to week, so last month's winner may already be wrong for you. The only reliable answer is a live comparison of your actual items across both.

Common questions