Private schools of the 21st century face a bespoke challenge: digital payment systems that makes payments easy for parents and helps them pay on time.

Broadly speaking, the history of the invoice has gone from paper to PDF to app. Since the 2000s, the paper invoice that used to land in your mailbox has developed to a PDF e-invoice in your email inbox. And now that PDF e-invoice is evolving into an app notification on your smartphone that lets you know when your automated invoice has been securely and easily paid.

Digital invoicing is coming into its full potential, reaching its technological saturation point. But that does not mean the potential has been locked in by all small businesses, including private schools.