Payment systems are the invisible plumbing of the financial world. Every time you swipe a card, send a UPI payment, write a check, or wire money — a payment system processes, clears, and settles that transaction behind the scenes.
Major types: real-time gross settlement (RTGS) for high-value transfers, automated clearing houses (ACH/NEFT) for batch processing, card networks (Visa/Mastercard), digital wallets (PayPal, Paytm), and instant payment systems (UPI, FedNow). India's UPI is the global gold standard, processing over 10 billion monthly transactions.
The global payments industry generates over $2.2 trillion in revenue annually. It is rapidly evolving — real-time payments are replacing batch processing, mobile wallets are replacing cash, and cross-border payment innovations (like India's UPI-Singapore PayNow linkage) are making international transfers faster and cheaper.