While research shows that flexible working hours are linked to higher productivity and employee retention rates, it also shows that bosses really don’t care, and rate their staff on other criteria.
One in-progress study from researchers at the University of Washington suggests that bosses are more likely to look favorably on early starters than late stayers.
Regardless of the fact that a night-owl might work exactly the same number of hours, with exactly the same productivity, your boss’s perception of your performance is often different.
A manager’s perceptions are enough to affect your career—a manager may perceive your late start as a sign of lower organizational commitment, and this flows on to the ratings in his performance appraisasl of your work.
So if you care about your career, it might pay for you to start work early—regardless of your company’s apparent commitment to flexible working hours.