Should be free of charge, according to BOA's site (https://bankofamerica.vbv.cyota.com/bankofamerica/registration/welcome.jsp)

 Benefits of Verified by Visa

• Buy online with confidence. By choosing a password and a Personal Message you help ensure that only you can make online purchases with your Bank of America Visa card(s).
  
  
• Zero liability. Notify us promptly if your card is lost or stolen and you won't be liable for unauthorized use of your card.
  
  
• Free. Verified by Visa is offered at no charge.
  
  
• Special offers and discounts. As a Verified by Visa registered cardholder, you can take advantage of special offers and discounts at participating