Register for GMAT
With computer adaptive testing (CAT), registering for the GMAT is quite simple and easy. The cost to take the exam —or "appointment fee" is currently $250. The Graduate Management Admissions Council (GMAC) takes most major credit cards, personal checks, and money orders.
The most convenient way to register is online at www.mba.com. You may also register by phone (1-800-717-GMAT) or by mail (Pearson VUE, Attention: GMAT Program, P.O. Box 581907, Minneapolis, MN, 55458).
To retake the exam, simply follow the same procedures. However, you are only allowed to take the GMAT every 31 days. more about Registeration for GMAT