United States vs Mexico · Real-time payment systems compared
| Capability | RTP | SPEI |
|---|---|---|
| QR Code Payments | — | ◐ |
| Wallet Support | — | — |
| 24/7 Availability | ✓ | ✓ |
| Cross-Border | — | — |
| ISO 20022 | ✓ | — |
| Request to Pay | ✓ | — |
| Open API | ✓ | ◐ |
| Alias/Proxy | — | ✓ |
The first modern US instant payment system, operated by The Clearing House (owned by 22 of the largest US banks). RTP launched in 2017 and supports credit transfers up to $1M with immediate finality — no chargebacks or returns. It also offers Request for Payment (RfP) messaging for bill pay and invoicing. While FedNow provides Fed-backed infrastructure, RTP has a head start with broader bank connectivity and higher transaction limits, and processes the majority of US instant payment volume today.
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.