Co-op has revealed that the cyber-attack it suffered earlier this year cost the company an estimated £206m in revenue.

The retail chain said the “malicious” attack in April had damaged its IT networks, caused payment problems, and forced it to temporarily shut down several systems to contain the threat.

Co-op, publishing its H1 results covering the six months to 5 July, reported a 2.1% drop in total group revenue compared to last year, to £5.48bn. However, excluding the impact from the cyber-attack, the group said it would have recorded a 1.5% increase.

The retailer also posted a £56m loss for the H1 period, against a £35m profit in H1 last year.

Chair of the Co-op, Debbie White, said: “The first half of 2025 brought significant challenges, most notably from a malicious cyber-attack. Our balance sheet strength and the magnificent response of our 53,000 colleagues enabled us to maintain vital services for our members and their communities.

“We must now build our Co-op back better and stronger to meet the challenges and opportunities that lie ahead.”

Co-op said that on top of the costs of the cyber-attack, it had also experienced “expected and significant” cost headwinds, including living wage and national insurance increases, as well as new extended producer responsibility charges.

In its outlook, the company said it would continue to anticipate cost headwinds, global volatility and high competition, and that it would remain committed to a disciplined approach to investment, while managing a reducing level of cyber impact through H2.

Chief executive, Shirine Khoury-Haq, added: “The cyber-attack highlighted many of our strengths. But more importantly, it also highlighted areas we need to focus on – particularly in our food business. We’ve already started on this journey, refining our member and customer proposition, making structural changes to our business, and setting our Co-op up for long-term success.”

---