For more than a decade, instant, no-fee digital payments via India’s Unified Payments Interface (UPI) have become a seamless part of daily life for hundreds of millions of people across the country. From street-side vegetable vendors in Kolkata to horseback riding operators on coastal beaches, businesses large and small display simple printed QR codes that let customers complete transactions in seconds, no cash, card machines, or visible charges required. But that long-standing no-fee model may be poised for change, as New Delhi paves the way for banks and payment processing firms to impose a small merchant discount rate (MDR) on certain UPI transactions, kicking off a high-stakes debate over the future of the world’s most active real-time payment network.
The government has emphasized that consumers and person-to-person UPI transfers will remain completely free of charge. Under current proposals, fees would only apply to transactions above a set threshold at larger businesses, with the proposed MDR ranging between 0.3% and 0.5% — a small cut that merchants pay to the banks and fintech companies that process UPI payments. Officials are still finalizing the exact rate and scope of the new policy, but early frameworks are crafted to limit disruption to everyday small-value transactions.
The stakes of this policy shift are hard to overstate. Since its launch in 2016, UPI has grown from a niche digital payments experiment to a global powerhouse, fundamentally reshaping how India does business. Official data shows that in July alone, the network processed 23.6 billion transactions worth a total of 29.87 trillion rupees, equal to roughly $313.5 billion. In the 2025-2026 financial year, total annual transactions hit nearly 241.6 billion — almost 12,000 times the volume recorded in UPI’s first full year of operation. Today, more than 550 million Indians use the system regularly, and UPI has expanded beyond India’s borders to enable digital payments in 11 other countries.
Unlike many closed, privately owned payment networks, UPI’s unique open design has been central to its success. India built a shared, public digital infrastructure operated by the non-profit National Payments Corporation of India, allowing competing fintech providers such as Google Pay and PhonePe to battle for customers while still enabling cross-platform transactions. But what many observers overlook is the critical role that merchant incentives, specifically the zero-MDR policy, played in driving the network’s explosive growth.
New research from economists Abhinav Motheram and Sharon Buteau confirms that widespread merchant acceptance was not just a side effect of UPI’s popularity — it was one of the core drivers of adoption. Districts with denser merchant networks consistently saw faster, higher uptake of UPI among consumers. For small, informal traders such as vegetable sellers and street food vendors, accepting UPI requires no expensive card terminal, only a cheap printed QR code. With no processing fees to absorb, there was virtually no financial barrier for these small businesses to join the network, creating a self-reinforcing cycle of adoption: more merchants attracted more users, which in turn attracted more merchants.
The current proposal is intentionally designed to minimize disruption to this dynamic. One leading option under discussion would apply fees only to transactions above 2,000 rupees at large businesses, leaving small traders and low-value everyday purchases completely untouched. According to analysis from global brokerage firm Jefferies, transactions above this threshold make up just 4% of total UPI merchant transaction volumes, but account for roughly 67% of the total value of those transactions. This structure would allow banks and payment firms to collect up to an estimated $1 billion in new annual revenue, while leaving payments to neighborhood grocers and local vendors unchanged.
The push for fees also addresses a growing, unignorable financial reality: while UPI feels free to users, it is not free to operate. Servers must be maintained, transactions settled in real time, fraud detected, and the entire system defended against constant cyber threats. For a decade, the Indian government has compensated banks and payment providers for these costs, framing UPI as a public infrastructure project to expand digital inclusion. But as Reserve Bank of India Governor Sanjay Malhotra recently noted, “Someone will have to pay the cost” of maintaining the network long-term.
Still, economists warn that the impact of even a small fee depends heavily on which merchants it affects. Small informal traders operate on extremely thin profit margins, so even a nominal MDR could change their incentives to accept UPI — particularly in less developed districts where merchant networks are still growing and adoption has not yet matured. Motheram warns that if fees eventually expand to cover small and informal traders, they could slow the expansion of the merchant network that has been the backbone of UPI’s success. “Even a small fee could matter if it changes the incentives of small merchants operating on thin margins,” he explained.
India now faces a delicate balancing act: it needs to make UPI financially sustainable for providers, without eroding the open, low-barrier conditions that turned the network into a national utility. The challenge is not unprecedented: Brazil’s successful instant payment system Pix also offers free transactions for individual users, while allowing low-cost processing fees for businesses, and it has become the world’s fastest-growing real-time payment network with more than 140 million users and 4 billion monthly transactions.
Economist Renuka Sane argues that a well-designed fee structure could bring “commercial sanity” to India’s digital payment ecosystem, allowing providers to price risk properly, invest in infrastructure upgrades, and build a more resilient network long-term. Most experts agree that the powerful network effects of UPI make a mass exodus of users unlikely even after fees are introduced, especially with fees limited to large high-value transactions. But there are still notable risks: a 2024 survey from Indian polling firm LocalCircles found that 75% of UPI users said they would stop using the service if transaction fees were imposed, with just 22% willing to pay.
The larger risk is more subtle: if merchant fees reduce small businesses’ enthusiasm for accepting UPI, or discourage new small traders from joining the network, UPI could lose the frictionless, universally accepted quality that made it a household name. After a first decade spent building the network and onboarding hundreds of millions of users and millions of merchants, India is now entering its third era of UPI: figuring out how to fund the system without undermining the success that made it a global model for digital public infrastructure.