India vs Thailand · Real-time payment systems compared
| Capability | IMPS | PromptPay |
|---|---|---|
| QR Code Payments | — | ✓ |
| Wallet Support | — | — |
| 24/7 Availability | ✓ | ✓ |
| Cross-Border | — | ✓ |
| ISO 20022 | — | ✓ |
| Request to Pay | — | — |
| Open API | ◐ | ◐ |
| Alias/Proxy | — | ✓ |
Immediate Payment Service is India's original 24/7 real-time interbank transfer system launched by NPCI, and the foundational infrastructure that UPI was later built upon. IMPS uses MMID (Mobile Money Identifier) and mobile number for addressing, supports transfers up to INR 5 lakh, and connects banks via the National Financial Switch. While UPI has overtaken it for consumer payments, IMPS remains widely used for direct bank-to-bank transfers and backend settlement.
Thailand's national e-payment system, a core part of the government's National e-Payment Master Plan. PromptPay links bank accounts to mobile numbers or national citizen IDs for instant P2P transfers, and includes a standardised QR code system for merchant payments. Operated by NITMX under Bank of Thailand oversight, it connects all major banks with zero fees for transfers under THB 5,000. PromptPay has cross-border QR linkages with Singapore's PayNow, Malaysia's DuitNow, and other ASEAN systems.