What is recurring billing?

Recurring billing is billing that happens more than one time - on a cycle, usually on a monthly or yearly basis. Utility bills are an example of recurring bills. With online recurring billing, customers' credit cards are charged each month (or week, day year etc. depending on the billing cycle) to pay for a service - usually SaaS (software as a service). There are a wide variety of internet programs that enable companies to automatically bill their customers on a billing cycle. Some of these companies are Chargify, CheddarGetter, Recurly and Spreedly.