UPI: India's real-time bank transfer (a2a)
India's Unified Payments Interface — the world's largest real-time payments rail by volume.
How the UPI flow works
UPI (Unified Payments Interface) is operated by the National Payments Corporation of India (NPCI) and connects every major Indian bank into a single instant payments network. Consumers use a UPI ID (a bank-linked handle like name@okhdfcbank) or scan a merchant QR.
At checkout the merchant's PSP creates a UPI collect request or dynamic QR. The consumer approves inside their UPI app (Google Pay, PhonePe, Paytm, BHIM, or their bank's own app) with a UPI PIN.
Funds move bank-to-bank through NPCI settlement in seconds, 24/7. The merchant receives a webhook confirming the debit and can release the order immediately.
There is no card scheme, no interchange, and — under current NPCI/RBI rules — no merchant discount rate on person-to-merchant UPI transactions up to defined limits.
Typical use cases
- Any Indian e-commerce, in-app or in-person checkout.
- Bill pay, ticketing, quick-commerce and food delivery.
- Cross-border merchants selling into India where card penetration is limited.
- Recurring flows via UPI AutoPay mandates for subscriptions and utilities.
Consumer reach
Available to hundreds of millions of Indian bank customers across every major issuer.
By transaction count, UPI is the largest real-time payments network in the world.
Ubiquitous across urban and rural India and across income brackets, materially wider reach than cards.
Who should accept UPI
- Any merchant selling to Indian consumers — UPI is the default expected method.
- Cross-border merchants targeting India who currently rely on international cards.
- Subscription businesses that can adopt UPI AutoPay for recurring collection.
Operational detail
The operational half of every method profile — settlement, refunds, disputes, PSP coverage and licensing — is reserved for Payment Methods List founding partners. It's the part vendor sites won't publish and the part that actually decides whether UPI works for your stack.
Settlement time
How fast UPI funds land after the payer confirms, behaviour outside scheme hours, whether the rail settles gross or net, and the realistic T+n to sweep to USD/EUR — plus the PSPs where the advertised timeline actually holds in India.
Book a founding-partner call →Refund mechanics
How UPI refunds are executed end-to-end when the rail has no scheme-level reversal — payer-initiated pulls, credit transfers, or PSP-fronted refunds — plus partial-refund support, time limits, and the API surface each PSP exposes.
Book a founding-partner call →Chargeback exposure
Whether UPI has any dispute construct at all, which recall/return/indemnity vectors actually exist on the rail, how consumer-protection rules in India route claims back to merchants, and observed loss rates versus cards.
Book a founding-partner call →PSP coverage matrix
Which acquirers and aggregators run direct rail connections to UPI vs. reselling a partner, coverage depth and reliability, effective pricing bands, and who to pick when India volume is your primary use case.
Book a founding-partner call →KYC & licensing notes
Requirements to accept UPI — local entity vs. cross-border MoR, licensing regime governing the rail in India, KYC obligations at onboarding and per-transaction, and FX/reporting rules for foreign merchants.
Book a founding-partner call →