Answered by Phil, Hiring Expert at Merck & Co., Inc., on Monday, September 25, 2017
Hi there - what you wear on an interview is absolutely important to the interview process. It shows that you take the interview seriously, that you have a sense of professionalism, and create a positive first impression. These impressions are formed very quickly based on what you're wearing and how you carry yourself. While different industries may have differing cultures surrounding "professionalism", I would say that a general rule of thumb is a shirt, tie, and dress pants for men, and a professional suit for women is a good idea to live by. You never have a second chance to make a good first impression! Best of luck. - Phil