Under the “Payment Information” tab, the current payment method on file displays by default so the Owners and Accountants can easily verify which method is being used. By clicking the "Update" option, they can add new payment information to be used for the next subscription payment. All accounts should have the ability to add credit cards as valid payment methods, but US located accounts have the additional option of linking their bank account to make ACH payments.
To add a credit card, select the "Credit Card" option (if displayed), click the "Update" button, and fill out the required information. Some debit cards may work if they are one of the larger branded cards like Visa or MasterCard, but in general this payment type is not as widely supported as credit cards.