NPCI gave India's payment rails away free — and wallets had to compete on top

By 2016 India's digital payments were fragmented: mobile wallets like Paytm and MobiKwik could not pay each other, and card acceptance never scaled — India had about 0.002 point-of-sale terminals per capita. The obvious move for any single player was to build a bigger walled garden. The National Payments Corporation of India, a not-for-profit owned by banks and overseen by the RBI, did the opposite: it built a shared rail and gave it away.

UPI, founded in April 2016, let any two bank accounts transfer money instantly through mobile apps and QR codes, including on weekends and holidays, with no upfront hardware cost for merchants. Because it was a protocol rather than a product, Google, PhonePe, Paytm and dozens of banks all built competing apps on top of the same rail — the silos' worst nightmare became their common foundation.

Then the state removed the last friction: from 1 January 2020 no merchant discount rate could be charged on UPI and RuPay transactions, and every company with turnover above Rs 50 crore was required to offer UPI QR payment. A 2019 survey of Jaipur merchants found UPI already affordable and dominant among digital options; within a year of that study, UPI usage had grown roughly 19-fold. By the mid-2020s UPI carried the large majority of India's digital payments and several countries were studying copies of the model.

Don't build a wallet; make the rails free and universal

Interoperability killed the wallet silos' lock-in: any app could pay any account, so apps competed on service, not on captive networks.

Zero upfront cost — a printed QR code replaced a card terminal — put acceptance within reach of the smallest shop.

Zero MDR from 2020 removed merchants' economic objection to accepting digital payments.

Being bank-owned and not-for-profit, NPCI had no need to monetize the rail itself, so it could stay free.

When every player builds a walled garden, the winning move can be public infrastructure: give the rail away and let competition happen one layer up.

UPI became the backbone of Indian payments, spawning an ecosystem of apps, credit products and merchant lending built on its transaction trails. Brazil, Singapore, the UAE and others moved to link with or emulate the system, making it India's most-exported piece of financial infrastructure.