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UK Law Requires Supermarkets to Show Standardised Unit Prices and Loyalty Rates

The change will make it easier for shoppers to compare value by forcing clearer metric unit prices and prominent disclosure of discounted prices with their conditions.

Overview

  • Major supermarket chains were required to put the rules into effect on Saturday, June 6, 2026, so stores must now display standardised unit prices and both regular and loyalty prices where different rates apply.
  • The unit-pricing rules have been expanded to cover more packaged goods such as cereals, pasta, dried fruit, detergents, cleaning products and cosmetics so shoppers can compare like for like.
  • When shown, unit prices must use standard metric measures — price per kilogram, litre, metre, square metre, or cubic metre — regardless of a product’s package size to improve clarity.
  • Practical exemptions allow mixed-item packages like gift hampers to omit unit prices and require deposit amounts to be excluded from the displayed selling price.
  • Retailers must update pricing systems, retrain staff and redesign in-store and online labels, creating upfront costs and operational work while leaving unanswered questions about precise enforcement and compliance timelines.