A Decade of UPI: How India Built the World's Most Used Real-Time Payment System

Lucknow, August 24 (TNA) Ten years after its pilot launch, the Unified Payments Interface (UPI) has grown from a modest experiment involving 21 banks into the backbone of India's digital economy-and, by several measures, the world's largest and most widely used real-time payments network. Developed by the National Payments Corporation of India (NPCI), UPI is now accepted in 11 countries, with Greece and the Maldives the latest additions to its expanding international footprint.

UPI began life quietly, launched on a pilot basis in April 2016 with just 21 member banks. By August that year, it had moved from pilot to public rollout, as participating banks made their UPI-enabled apps available on the Google Play Store. That December, NPCI introduced BHIM, an app allowing users to make direct bank-to-bank transfers from their mobile phones-a foundational step in bringing digital payments to ordinary users without needing a dedicated merchant relationship or card network.

The system's core design has remained its biggest strength: a real-time payment platform that lets a single mobile application, offered by any participating bank or payment service provider, connect to multiple bank accounts. It integrates fund transfers, merchant payments and banking services on one interoperable platform, operates round the clock, and secures transactions through two-factor authentication and end-to-end encryption.

What distinguishes UPI's growth story is less a single breakthrough than a steady accumulation of features, each addressing a specific gap in usability or reach. In 2017, dynamic QR codes arrived, allowing retail merchants to embed transaction specifics-payee details and exact amounts-directly into a scannable code, removing the need for manual entry. The following year brought UPI 2.0, which introduced "Invoice in the Inbox" for viewing bills before authorising payment, signed intent and QR features to simplify authorisation, UPI Mandates for recurring payments, and the ability to link overdraft accounts to UPI transactions.

By 2019, the platform's utility had expanded beyond peer-to-peer and merchant payments: the Securities and Exchange Board of India (SEBI) permitted retail investors to use UPI as a payment mechanism for IPO applications. That October, UPI crossed one billion transactions in a single month for the first time-an early signal of the scale it would eventually reach.

The pandemic years accelerated adoption further. UPI AutoPay arrived to support recurring payments for subscriptions, utility bills, insurance premiums, SIPs and EMIs. UPI 123PAY extended the platform to feature-phone users through IVR numbers, missed-call-based payments and proximity sound-based transactions-a deliberate effort to bring non-smartphone users into the digital payments fold. UPI Lite was introduced for fast, PIN-less low-value transactions, and credit cards were integrated with UPI, widening the range of funding sources available to users. By FY 2021–22, UPI had processed transactions worth over $1 trillion and crossed 5 billion monthly transactions by March 2022. That year also marked its first international deployment, in Bhutan.

The pace of innovation has not slowed since. In 2023, Credit Line on UPI allowed pre-sanctioned bank credit lines to function as UPI funding accounts, and the platform's share of India's digital payment transactions rose to roughly 70 per cent by FY 2023–24. In 2024, UPI Circle enabled primary account holders to authorise secondary users with defined transaction limits, while the Reserve Bank of India raised transaction limits for tax payments from ₹1 lakh to ₹5 lakh, with similar increases for capital markets, IPO subscriptions, loan collections, insurance, healthcare and education payments. Limits for UPI 123Pay and UPI Lite were also raised the same year. In 2025, on-device biometric authentication-fingerprint and face unlock-was introduced, alongside Aadhaar-based Face Authentication to simplify UPI PIN onboarding for first-time users, senior citizens and those without easy access to cards.

The scale of UPI's expansion over the past decade is striking by any measure. Annual transaction volume grew from 2 crore transactions in FY 2016–17 to over 24,162 crore transactions in FY 2025–26 -roughly a 12,000-fold increase. Annual transaction value rose from ₹0.07 lakh crore to approximately ₹314 lakh crore over the same period, a more than 4,000-fold jump.

UPI's significance has extended well beyond India's borders. As of 2024, it accounted for approximately 49 per cent of global real-time payment transaction volume-a scale acknowledged by the International Monetary Fund in its June 2025 report, "Growing Retail Digital Payments: The Value of Interoperability."

The platform's cross-border expansion has picked up pace in recent months. UPI is now operational in Bhutan, Nepal, Singapore, the UAE, France, Sri Lanka, Mauritius and Qatar for cross-border payment acceptance. In June 2026, NPCI International Payments Limited partnered with Cambodia's ACLEDA Bank to launch UPI acceptance in that country, and UPI went live in Greece for cross-border remittances, enabling eligible customers to transfer funds instantly between Greece and India through Eurobank. 

Most recently, on July 30, 2026, cross-border remittances went live between the Maldives' Instant Payment System, Favara, and India's UPI-a development officials described as a significant milestone in bilateral digital financial connectivity between the two countries. As things stand, UPI is now live in 11 foreign countries for acceptance and/or cross-border remittances.