India's Unified Payments Interface (UPI) lets people send money instantly from a phone by scanning a code or entering a number. The International Monetary Fund has cited it as the world's largest real-time payment system by transaction volume, with reports putting it near 49% of global real-time payments.
The growth is striking. UPI went from about 3.75 billion transactions in 2018 to roughly 170 billion in 2024, and it now carries a large share of India's digital payments. Because it works on basic smartphones and is free for most users, small vendors and rural users have joined the digital economy, which supporters connect to greater financial inclusion.
A careful reader checks a few things. Transaction counts look enormous partly because many UPI payments are small everyday amounts, so counting payments and adding up their value give different pictures. Claims that UPI is the world's largest depend on which systems are compared. And linking UPI to financial inclusion is a correlation: it rose alongside other changes like a national ID program and cheaper data, so it is one factor among several, not proven to be the single cause.