More than 40 percent of professionals report they often lose sleep because they can’t get their job off their minds, according to a survey of 2,800 people by global staffing firm Accountemps, reports CNBC.

“If you’re not sleeping, you’re going to have lower productivity, health issues and work-life balance issues,” said Bill Driscoll, district president of Accountemps. The most common work-related issue disrupting people’s slumber is an overwhelming feeling about their job’s responsibilities or hours.

Many people also say they stay up fixating on a business problem or worrying about their relationships with their co-workers. Some people say it’s a fear of being fired that leaves them staring at the ceiling. Others blame their boss for their sleeplessness.