A system and associated processes for consolidating and replacing various forms of payment (e.g. credit cards, debit cards, and cash) with a single payment system is presented. A client system can read a machine-readable code generated by a merchant system associated with a merchant, or other product or service provider, and present the information encoded by the machine-readable code to a customer. Upon receiving confirmation that the customer desires to proceed with the transaction, the client system can initiate payment by contacting a payment system associated with the customer. This payment system can then transfer payment to the merchant by, for example, transferring cash from the customer's account or using credit associated with the customer's account. Thus, embodiments of the present disclosure enable a customer to complete a transaction without using, for example, cash, a credit card, or a debit card.