How often can I take the GMAT™ exam? You can take the GMAT™ exam once every 16 calendar days and no more than five times in a rolling 12-month period and no more than eight times total (lifetime limit effective December 17, 2016).Click to see full answer. Also, is it bad to take GMAT multiple times?In short, no, it won’t. Retaking the GMAT doesn’t make you look bad! Many students retake the GMAT, so schools are used to seeing applicants with more than one set of GMAT scores. In fact, taking the GMAT more than once can show a school that you’re committed to improving on your work. how long are GMAT scores valid? five years Hereof, do business schools see all GMAT scores? Some schools like to see all scores from all sittings of the GMAT exam, while other schools are fine to only see your best score. If you accepted your scores at the test center, you have the option to cancel your accepted score online up to 72 hours after the completion of your exam.When should you take GMAT? The Short Answer You should take the GMAT any time that you have 2-3 months, or approximately 80-100 hours, to adequately prepare for it. Remember that your GMAT score is good for five years, so you can take the GMAT whenever you’re ready – even if you don’t plan on applying to business school for another year or two.