Discuss how the Unified Payments Interface (UPI) exemplifies India's Digital Public Infrastructure (DPI) model and assess its implications for financial inclusion.

Digital Public Infrastructure refers to shared, interoperable, publicly-governed digital rails on which private innovation can be built. UPI — launched in 2016 by the National Payments Corporation of India (NPCI) under RBI's regulatory oversight — is the clearest expression of this model, and its scale has translated directly into deeper financial inclusion.

UPI as a DPI exemplar

• Public rails, private applications: NPCI operates the interface while RBI regulates it; competing private apps and 703 banks plug into the same protocol, avoiding closed, proprietary wallets [1].
• Interoperability by design: a single Virtual Payment Address enables instant bank-to-bank transfer across any app — the very feature the IMF's June 2025 report "Growing Retail Digital Payments (The Value of Interoperability)" credited when recognising UPI as the world's largest retail fast-payment system by volume [2].
• Population-scale minimalism: annual volumes rose from 2 crore transactions in FY 2016-17 to 24,162 crore in FY 2025-26, an almost 12,000-fold surge, showing that a thin, standardised layer can scale nationally [1].
• Exportable public good: UPI is now live in seven countries including UAE, Singapore, Bhutan, Nepal, Sri Lanka, France and Mauritius, making DPI an instrument of India's digital diplomacy [1].

Implications for financial inclusion

• Widened access: 491 million individuals transact on UPI, converting Jan Dhan accounts opened under the JAM trinity into actively used accounts [1].
• Small-merchant empowerment: 65 million merchants accept digital payments through QR codes without costly card infrastructure, aiding street vendors and micro-enterprises [1].
• Formalisation: transaction value grew from ₹1 lakh crore (FY 2017-18) to ₹139 lakh crore (FY 2022-23), a CAGR of 168%, creating digital footprints that support cash-flow-based lending [3].
• Caveats: benefits remain contingent on connectivity, digital literacy and rising fraud risks, requiring sustained consumer protection.

UPI thus demonstrates that inclusion is achieved not merely by opening accounts but by building open, interoperable rails everyone can use. Strengthening grievance redressal, offline modes and vernacular interfaces will help extend these gains to the remaining unconnected — advancing the constitutional promise of economic justice and SDG-8's inclusive growth mandate.