How to read a Sainsbury's receipt

Sainsbury's receipts follow the standard UK shape: abbreviated names, VAT-marked lines, and discounts applied beneath the items. Nectar Prices are the layer that makes the shelf price unreliable as a record of what you paid.

Nectar Prices

A scanned Nectar card gives a lower price on selected items at the till. The receipt records the price charged, and the difference from the standard price is often shown as a saving. Two people buying the same basket on the same day pay different amounts, and only their receipts show it.

That gap between shelf price and what you were charged is the reason a receipt is worth reading at all. A card statement records one total for the shop. Only the receipt records which lines were discounted and by how much, which is what reading a receipt properly is for.

The codes

Every UK receipt prints a key at the foot explaining its own letter or symbol codes, and it is the only reliable guide to that receipt. The codes are not standardised between retailers and they change.

The general rule holds: most food is zero-rated, and marked lines are the taxed exceptions rather than a guide to what is ultra-processed.

The tiers say nothing about processing

Sainsbury's Stamped and Taste the Difference are price and specification tiers. Neither is a statement about how a product was manufactured, and the classification cuts straight across them: a premium ready meal and a value one are usually both group 4, while the value tinned tomatoes and the premium tinned tomatoes are both group 3.

Where the tiers do differ is in ingredient lists generally being shorter at the premium end, which sometimes moves a product and often does not. It is worth checking rather than assuming in either direction, and ready meals is the category where the assumption fails most reliably.

Online orders and substitutions

A delivered shop produces an invoice rather than a till receipt, and the difference matters. Substituted items are recorded as what you actually received, not what you ordered, and unavailable items simply are not there. If a week looks unexpectedly different from the one before it, a substitution is the first thing to check.

Delivery and service charges appear as lines too, and they are not food. Anything measuring a share of FOOD spend has to exclude them or the denominator is wrong, which is why non-food is reported separately rather than folded in.