Roughly a quarter of employees who get to work late will make up an excuse, according to CareerBuilder, a Chicago, Ill.-based online job site.

Based on a survey of about 7,000 workers and 2,700 employers, 15 percent of employees get to work late at least once a week. When they do, one in four will make up an excuse, the survey found.

While many cited common problems, such as traffic or sleepiness, others were more creative, employers said. Some of the excuses they’ve heard included long lines at Starbucks, or workers claiming to have accidentally gone to their former jobs.

Just under half of the employers surveyed said they don't mind occasional tardiness, so long as employees get their work done on time.

"Although flexible schedules are more common in the workplace these days, it is still important for employees to be mindful of their arrival times," Rosemary Haefner, vice president of human resources for CareerBuilder.com, said in a statement.

Apart from affecting productivity, workers who consistently show up late can have a bad influence on employee discipline and workplace ethics, Haefner said.