Pass rate statistics for the NBCOT ® can be found at https://secure.nbcot.org/data/schoolstats.aspx. Please note that the overall pass rate is the cumulative pass rate and includes students that may have failed the first time but passed on subsequent attempts. The fail rate for the NBCOT OTR ® and COTA ® exams average around 10-25%. We hope that OTQuestions aids you in the passing of your exams.