Mexico vs India · Real-time payment systems compared
| Capability | SPEI | UPI |
|---|---|---|
| QR Code Payments | ◐ | ✓ |
| Wallet Support | — | ✓ |
| 24/7 Availability | ✓ | ✓ |
| Cross-Border | — | ✓ |
| ISO 20022 | — | — |
| Request to Pay | — | ✓ |
| Open API | ◐ | ✓ |
| Alias/Proxy | ✓ | ✓ |
Mexico's Sistema de Pagos Electrónicos Interbancarios is one of the world's earliest 24/7 real-time payment systems, operated directly by the central bank (Banxico). SPEI processes both high-value and retail payments with no maximum transaction limit, settling in real time through Banxico's accounts. It supports CLABE (standardised 18-digit account numbers) and has been extended with CoDi, a QR-based overlay for merchant payments. Note: SPEI data includes both immediate and scheduled transfers on the same rail, as Banxico does not separately report real-time vs deferred transactions.
Unified Payments Interface is a real-time interbank payment system built on top of IMPS infrastructure, enabling instant mobile payments via QR code, phone number, Aadhaar, or virtual payment address (VPA). With 300+ participating banks and 50+ third-party apps (Google Pay, PhonePe, Paytm), UPI processes 14B+ transactions per month and has become India's dominant payment method for both P2P and merchant payments. Now expanding internationally with cross-border linkages to Singapore's PayNow and other ASEAN systems.