A. Rescheduling of the GMAT exam can be done through two major modes: online and via phone. 1 to 14 days prior to appointment: US $150 15 to 60 days prior to appointment: US $100 More than 60 days prior to appointment: US $50 Please note that the exam cannot be rescheduled on the test date. The only difference in rescheduling the exam is through the phone is that you would need to pay a $10 surcharge along with the rescheduling fee. Retaking the GMAT exam can be done after 16 days from your previous attempt. However, the maximum limit of attempting the exam is 5 times a year. This rolling 12-month period is counted from your first attempt irrespective of the time of year.