An increasing number of employees are working more than 60 hours a week, according to a DTI survey.
One in six surveyed said they were working more than 60 hours a week compared to one in eight two years ago. And more then 10 per cent of women now work more than 60 hours a week, double the number of doing so in 2000.
The survey finds, the majority of people who work 60 hours or more are under 40.
Twenty-one per cent of 30-39-year olds work 60 hours or more compared to just 14 per cent of those over 40.
The survey also shows most people are not rewarded for the extra hours they put in.
Three-quarters of employees currently work overtime, but of these, only a third are awarded with extra pay or time off in lieu.
Secretary of State for Trade and Industry Patricia Hewitt urged employers to work with their staff to find "sensible work-life balance solutions".
"I am determined to get the merits of flexible working onto the business agenda especially for the parents of young children who often find it the most difficult to balance work and home life," she said.