IMPS Explained

5 min read Bank Utils

What IMPS Is

IMPS stands for Immediate Payment Service. It is operated by NPCI (National Payments Corporation of India) and allows instant interbank fund transfers around the clock, including bank holidays and Sundays. Unlike NEFT, which originally used batch processing, IMPS processes each instruction individually and the credit typically reaches the beneficiary within seconds.

IMPS Transaction Limits

Most banks allow IMPS transactions up to 5 lakh per transaction through internet and mobile banking. Some banks have extended this to 10 lakh for specific channels. There is no minimum amount, making IMPS suitable for everything from a 10 transfer to a 5 lakh payment. For amounts above 2 lakh that require real-time settlement, RTGS is the alternative when IMPS limits are exceeded.

How IMPS Works Technically

IMPS uses the NPCI interbank settlement infrastructure. When you send money via IMPS, the instruction travels through your bank to the NPCI IMPS switch, which routes it to the destination bank. The destination bank credits the account and sends a confirmation. The sender receives a unique transaction reference number that can be used to track or dispute the payment.

IMPS via Mobile Number (MMID)

Beyond account number and IFSC, IMPS supports transfers using just a mobile number and MMID (Mobile Money Identifier). Each bank account linked to mobile banking gets an MMID. A sender can initiate an IMPS transfer by entering the recipient's registered mobile number and MMID useful when you don't have the full bank account details but have the recipient's mobile number.

IMPS vs UPI

Both IMPS and UPI offer instant transfers, but UPI is layered on top of IMPS for the settlement leg. UPI adds a simplified addressing layer (UPI IDs), unified apps, QR codes, and a request-money flow. IMPS remains the underlying infrastructure for both UPI credit transfers and direct IMPS transfers made through banking apps. UPI has largely replaced direct IMPS for retail peer-to-peer transfers.

When IMPS Still Outperforms UPI

IMPS through bank apps is preferred over UPI when transferring to beneficiaries not on UPI, when sending from corporate banking systems not integrated with UPI, or when a transaction confirmation receipt number from the bank's own system is required for audit. IMPS references are also more consistent across bank statements than UPI transaction IDs.