Systems and methods for online billpay using credit products are disclosed. In one embodiment, in an information processing apparatus comprising at least one computer processor, a method for online billpay using a credit product may include: (1) receiving, from a customer, an identification of a merchant for online credit-based bill pay; (2) retrieving accepted payment mechanisms from the merchant; (3) selecting a payment mechanism from the accepted payment mechanisms; (4) receiving an invoice for a customer transaction with the merchant from the merchant; (5) conducting a payment transaction with the selected payment mechanism; and (6) charging the payment transaction to a credit account associated with the customer.