If you pay your bills online or over the telephone with your bank's Internet or telephone banking service, all you need to do is add your Citi™ MasterCard® as a bill payment.
Search for either "Citibank" or "Citi MasterCard" on your bank's list. Once your Citi MasterCard account is set up as a payee, you can pay it just as you would your cable or utility bill. Please allow 3-5 business days for payments to be processed.
If you haven't yet set up electronic payments, contact your bank and they'll set it up for you.