Asda is to cut a total of 1,360 within the next three months, it has been confirmed.
The supermarket chain, which is owned by US-based Walmart, had previously said there would be job losses but it did not reveal the number of cuts.
The plan will affect the management structure across its 578 UK stores.
The retailer said the redundancies will help create more flexible store management.
It said this would include greater emphasis on online services, removing so-called back office administration and increase the number of workers on the shop floor.
Asda chief executive Andy Clarke outlined a proposal to restructure store management last May.
At the same time, store staff were told of the new proposals, which were set to affect 4,100 people.
A formal 45-day consultation period then followed the announcement.
Asda was formerly equal second in the supermarket size ranking, alongside Sainsbury’s, but has been losing ground with the rise of the deep discounters Aldi and Lidl.
Market leader Tesco has also seen its dominance whittled away by the discounters and the drift of some shoppers to the premium offerings of M&S and Waitrose.
Mr Clarke said: “Every supermarket must adapt to the intense changes in UK retailing or they will get left behind.
“We spotted this nearly two years ago, responding with a new strategy and taking time to thoroughly examine our structures, test scenarios, talk to our colleagues and adjust our proposals accordingly.
“This thorough process has helped us to reach this difficult decision today.”