An IIT Bombay report has cautioned that the proposed merchant discount rate, or MDR, framework for Unified Payments Interface transactions could undermine public trust if introduced without careful safeguards. The warning lands at a sensitive moment for India's digital payments ecosystem, where UPI has become not just a convenience tool but a public utility-like platform embedded in daily commerce, mobility payments and small-ticket transactions across the country.
The report's central argument is that the success of UPI rests on a fragile but powerful social contract: users have come to expect fast, low-cost or free transactions, and merchants have adopted the system because it is simple, interoperable and broadly affordable. Any policy shift that appears to make UPI more expensive, less predictable or less user-friendly risks triggering resistance well beyond the payments industry. The study therefore urges rationalisation of the MDR framework so that the platform does not attract negative sentiment among consumers or small businesses.
Trust At Stake
The concern is not merely about pricing mechanics. It is about perception, adoption and behavioural inertia. UPI has expanded at extraordinary speed because it removed friction from digital payments and created a near-universal standard for peer-to-peer transfers and merchant payments. If the public begins to associate UPI with hidden charges, merchant pass-through fees or policy confusion, the reputational damage could be disproportionate to the immediate revenue implications of the MDR debate.
For the automotive, EV and mobility sectors, the stakes are especially high. These industries increasingly depend on digital payments for charging, parking, tolling, ride-hailing, service centres and subscription-based mobility models. A policy that unsettles confidence in UPI could ripple through these use cases, where transaction speed and low cost are essential to customer experience. In EV charging, for instance, seamless low-value payments are central to adoption, and any friction could slow consumer comfort with public charging infrastructure.
The report appears to be warning policymakers against treating UPI as a conventional card network, where MDR is a familiar and accepted part of the payments stack. UPI's scale and public-policy role are different. It has been promoted for years as a digital public good, and that framing has helped drive mass adoption among first-time digital users, street vendors, small retailers and transport-linked businesses. A poorly calibrated fee structure could blur that narrative and invite the perception that the state is retreating from the promise of low-cost digital access.
Policy Balance Needed
The challenge for policymakers is to preserve the economic viability of the payments ecosystem without damaging the trust that underpins it. Payment service providers, banks and merchant aggregators all require sustainable incentives to maintain infrastructure, manage fraud controls and support innovation. Yet the report suggests that any MDR framework must be designed with exceptional caution, transparency and segmentation, rather than applied in a blunt or uniform manner.
That balance matters because UPI's growth has been built on scale effects. The more people use it, the more indispensable it becomes for merchants, transport operators and mobility platforms. But scale can cut both ways: if users believe the system is becoming monetised in a way that disadvantages them, even a small policy change can generate outsized backlash. In a market where trust is the main currency, sentiment can shift faster than regulation can respond.
The report also implicitly raises a broader question about the future of India's digital payments architecture. As transaction volumes rise, the pressure to create a sustainable commercial model will only intensify. But the transition must be managed in a way that protects the public-interest character of UPI. If the framework is seen as extracting value from a platform that millions regard as free and dependable, the resulting friction could slow adoption, especially among price-sensitive users and micro-merchants.
For now, the report serves as a warning shot: UPI's success cannot be taken for granted. Any MDR reform will need to be explained carefully, implemented gradually and designed to avoid the impression that the country's most trusted payments rail is becoming a cost burden. In a system built on confidence, even the suggestion of a charge can carry strategic consequences.