Credit Card Payments accepted by Official Payments
There is a graduated fee for debit or credit card payments based on the amount of the transaction, excluding parking ticket payments; for parking ticket payments, there is a $2.00 per-ticket service fee.
Service Fee Schedule

Electronic Check Transactions (E-Check)
A $2.00 convenience fee is added to the total transaction when paying with an electronic check. A valid US bank account and bank routing number are required. Payments are credited immediately, and the charge is debited within two days.