Microsoft UK have launched a campaign to encourage staff to stop working so hard.
Bosses will make a donation to the NSPCC children's charity whenever employees leave before 5.30pm.
The company wants its Club 17.30 scheme to improve staff performance by reducing the time they spend at work.
Managing director of Microsoft UK Neil Holloway said: "Bosses have to wake up to the dangers of creating an all-work, no-play culture."
The firm says six out of 10 employees would rather have a shorter working day than a large pay rise.
Professor Gary Cooper, a psychologist at the Manchester Institute Of Science And Technology said: "Companies are taking notice not because cutting hours is trendy but because it could be beneficial for the company and the employee.
"It is not a question of working hard. It's more about working smarter and more efficiently."
Microsoft UK marketing manager Stephanie Thorn said of the campaign: "We now have a better quality of work, social and family life."