When you register as an individual investor, you input your credit card number, and this credit card is charged at the same day of every month until you choose to cancel your account. When setting up student accounts for their class, the professors select whether the service will be paid for by the students or by the school. If student payment is selected, then students will be asked to pay with their credit card upon registration. If teacher payment is selected, then after all the students register, the school will be invoiced for the entire class based on the total amount of students registered. We accept the following credit cards: Visa and MasterCard.