Over on the Evil HR Lady blog, there is a post that discusses how being chronically late can hurt a career and she references a recent article on the subject from The New York Times. One situation where being late will definitely hurt your career is the job interview. When you arrive late for an interview you enter the conversation with a strike against you and it will be difficult to recover ground after that. If you are interviewing in a part of town that you are not familiar with or do not commute to regularly, do a test run to the location the day before your scheduled appointment. Check out the building and the security procedures and if they are somewhat elaborate, factor that into the amount of time you will need to reach the actual office where the interview will take place.