As well as closing shops, Pret will also sell its main support office in Victoria. Pret has 410 shops in the UK.
The company has traditionally sold sandwiches and coffee to office workers but the company said it now needs to look at a new business model after coronavirus.
The company said: "Meanwhile plans are underway to reshape Pret’s business model over the medium term.
"While much of Pret’s historic growth has been built around office locations and serving office workers, a key focus in future will be about bringing Pret to more people, through different channels and in new ways."