Subscriptions are recurring invoices. Subscriptions are completely customisable – you can specify when invoices are created, whether it be daily, weekly, every three days, anually etc. When creating a subscription, you’ll notice the interface is similar the invoice interface – You will need to select a customer, subject and add some invoice items. But you’ll also see the option to specify how many days, weeks, months and months between each invoice. You can even choose to send the invoice by email to the customer automatically which means you won’t have to worry about those regular invoices.