Glossary · Finance & Payments

IMPS (Immediate Payment Service)

IMPS is an instant, 24x7 interbank mobile and online funds transfer service in India operated by NPCI, using account details or a mobile number.

Updated October 6, 2026

IMPS (Immediate Payment Service) is an instant interbank electronic transfer service launched by NPCI in India. It lets a customer send money from one bank account to another in seconds, at any hour, through mobile banking, internet banking, ATMs or SMS.

Why it matters

IMPS was one of the first instant retail payment rails in India, and it paved the way for UPI. It supports several ways to address the receiver: account number plus IFSC code, mobile number plus MMID (Mobile Money Identifier), or Aadhaar-linked options. Banks commonly use it for quick account-to-account transfers and for payouts, where a business needs to pay a vendor or customer immediately outside batch windows.

Example

Beneficiary:  Asha Traders
Account:      000123456789
IFSC:         EXMP0001234
Amount:       12,000
Mode:         IMPS

On submission the sender's bank routes the instruction through NPCI, the receiver's bank credits the account, and both sides get a confirmation with an RRN (retrieval reference number).

Common mistakes

  • Assuming IMPS and UPI are the same thing. UPI is a newer layer with virtual addresses and PIN-based approval, though both run on NPCI infrastructure.
  • Forgetting that limits and charges differ by bank and channel.
  • Treating a timeout as failure and sending again. Check the status or RRN first to avoid a duplicate payment.

Rules and fees vary by country and by bank; this entry is a definition only.

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