UPI: Anatomy of a Payment Transaction

# Summary UPI (Unified Payments Interface) processes over 2,272 crore transactions monthly—more than any other real-time payment system globally—yet most users only see five visible moments: scanning, checking the payee name, entering an amount, inputting a PIN, and receiving confirmation. Between the PIN entry and the green tick, the payment travels invisibly through a chain of organizations (the app, your bank, NPCI as the central switch, the payee's bank, and payee's app), with each party verifying specific details before handing it to the next. While PhonePe and Google Pay dominate the user-facing app layer with about 80% of transactions, the underlying banking infrastructure constantly evolves, with new entrants like Flipkart's super.money rapidly climbing the rankings through incentives.