Evaluate the trade-off between financial sustainability of digital payment infrastructure and the goal of financial inclusion in India.

India's payments stack rests on a paradox: UPI became the world's largest real-time payment system largely by being free at the point of use, yet a zero-price system must still be funded every year. The 2026 move to a 0.4% Merchant Discount Rate on merchant payments above ₹2,000 brings this trade-off to a head.

The case for sustainability

• Scale creates cost: UPI volumes rose from 2 crore transactions in FY 2016-17 to over 24,162 crore in FY 2025-26, with the IMF recognising it as the world's largest real-time payment system [1]. Running, securing and policing fraud across this network carries a recurring bill that zero-MDR left uncovered.
• The taxpayer was paying the merchant's bill: the Cabinet's ₹1,500 crore scheme reimbursed acquiring banks at 0.15% on small-merchant P2M transactions, sanctioned for a single financial year at a time [2]. Year-to-year budgetary support is not a durable business model.
• Service quality needs revenue: that scheme released its final 20% only if technical declines stayed below 0.75% and uptime above 99.5% [2] — reliability is a purchased good.

The case for inclusion

• UPI's reach was built on the Jan Dhan–Aadhaar–Mobile base of nearly 59 crore basic accounts [3]; pricing at the merchant end risks reversing hard-won adoption among the smallest retailers.
• Merchants unwilling to absorb a fee may split bills, offer cash discounts, or return to cash — thinning the digital trail that supports GST compliance and cash-flow-based lending.
• Digital deepening, tracked by the RBI Digital Payments Index [4], remains uneven across regions; the newest users are the most price-sensitive.

The conflict is real but not zero-sum. Cost recovery that is calibrated — exempting low-ticket, small and rural merchants while tying provider earnings to uptime and redress, as the earlier scheme did [2] — can fund the rails without pricing out the last shopkeeper. Sustainable infrastructure is itself a precondition for durable inclusion, and for SDG 8.10 on universal access to financial services.