Britain’s supermarket price war is doing something that would have seemed unlikely only a few years ago: retailers are absorbing more of their rising costs rather than passing the full increase on to shoppers.
The result is now visible in the inflation figures.
UK food and non-alcoholic drink inflation fell to 1.7% in June, down from 2.2% in May and its lowest annual rate since August 2024. Food prices also fell 0.2% between May and June.
For shoppers, this is significant.
Supermarkets are operating in one of the most competitive grocery markets in the world. Tesco, Sainsbury’s, Asda, Morrisons, Aldi, Lidl and other retailers are fighting hard for increasingly price-sensitive consumers.
That competition is limiting the ability of retailers to simply pass every increase in energy, transport, labour and supplier costs directly to the customer.
Instead, supermarkets are using promotions, pricing strategies, automation, private label and tighter cost control to protect market share. Reuters reports that major grocers have been absorbing cost pressures as they compete for shoppers.
The shopper is winning
The most interesting consequence is that supermarket competition is becoming a force against inflation.
Retailers may have to accept lower margins on some products rather than risk losing customers to a rival offering a cheaper alternative.
A shopper who sees a price increase at one supermarket can increasingly move to another. Aldi and Lidl have intensified that pressure, while the major traditional supermarkets have responded with aggressive promotions and price investment.
This creates a chain reaction.
Higher costs do not automatically become higher shelf prices.
Some of the pressure is absorbed by suppliers. Some is absorbed by supermarkets. Some is removed through operational efficiencies. And some is fought over through promotions and price competition.
The consumer ultimately benefits from the battle.
But this is not deflation
There is an important distinction.
A food inflation rate of 1.7% does not mean groceries are 1.7% cheaper.
It means food prices are, on average, 1.7% higher than a year earlier.
The extraordinary food-price increases of previous years have already lifted the price base substantially. What has changed is the speed at which prices are increasing.
That makes today’s figures particularly interesting.
The UK grocery market appears to be demonstrating that competition can restrain inflation even when retailers and suppliers continue to face significant cost pressures.
For shoppers, that may be the most welcome development in the supermarket sector this year.
The supermarket price war is no longer simply about gaining market share.
It is helping determine how much of the industry’s rising costs ultimately reaches the checkout.