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What is IMPS? PDF Print E-mail
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Wednesday, 26 December 2012 11:38
  1. What is IMPS?
  2. Interbank Mobile Payment Service (IMPS) is an instant interbank electronic fund transfer service through mobile phones. IMPS facilitates customers to use mobile instruments as a channel for accessing their banks accounts and remitting funds therefrom.

  3. Is this service approved by the Reserve Bank of India?
  4. The Reserve Bank of India has approved the pilot of IMPS.

  5. Which system does this service use?
  6. IMPS is functional through the National Financial Switch of NPCI, which is also used for routing ATM transactions.

  7. What is the messaging format used for IMPS transactions?
  8. IMPS transaction messages are as per the ISO 8583 standards.

  9. How is architecture of IMPS?
  10. The architecture of IMPS can be described as per the below diagram.

  11. Does the customer need to have a bank account for availing IMPS?
  12. Yes, the customer needs to have a bank account with the bank which has enabled this facility.

  13. Does the customer need to register to remit the funds through IMPS?
  14. Yes. Customer should enroll for Mobile Banking Service. The registration process shall be as per their bank’s laid down procedures.

  15. Can a customer link more than one account to the same mobile number?
  16. Yes. The customer can link the same mobile number to more than one account subject to feasibility provided by the bank.

  17. In case if the customer has more than one account linked to his / her mobile number how does he select the account from which he / she intends to pay?
  18. The bank will allocate a Mobile Money Identifier (MMID) for each account of the mobile banking customers. The customer can select the account using this MMID allocated to him / her.

  19. What beneficiary details does the customer need to affect an IMPS remittance?

    The beneficiary details required are:

    1. Beneficiary’s mobile number
    2. MMID of the beneficiary customer
  21. What happens to the transaction if there is a communication failure between banks and NPCI at the time of transaction?
  22. Incase if there is no revert from the beneficiary bank on any transaction the remitting bank can initiate a verification request on the status of the original fund transfer request and can find out the fate of the transaction. The remitting bank can initiate a maximum of three verification requests.

  23. How does the beneficiary bank revert to the transactions which cannot be credited to beneficiary accounts?
  24. NPCI has defined decline response codes for various anticipated failures. The beneficiary banks have to use these response codes to decline the transactions so that the justification for the decline is ultimately passed on to the customer.

  25. How does the reconciliation takes place for IMPS transactions?
  26. NPCI generates the raw data file daily basis which contains the transactions pertaining to respective Banks. NPCI has shared the raw data file format with banks. It is bank’s responsibility to reconcile these transactions with their IMPS and CBS system transaction log file daily basis.

  27. Are there any limits with respect to amount for IMPS transactions?
  28. This limit is defined by RBI in the Mobile Payment Guidelines issued to banks. Currently for encrypted messaging formats the limit is Rs.50,000 per day per account and for unencrypted messaging formats the limit is Rs.1,000 per day per account.

  29. Who is responsible to monitor the amount limits at account level for IMPS transactions?
  30. The participating banks have to monitor and control the amount limits as prescribed by RBI for Mobile Payments at the time of debit.

  31. What are the charges levied by NPCI for IMPS transactions?
  32. In view of helping the participating banks to promote IMPS transactions NPCI is not charging any transaction fees for the pilot of this service. Post Pilot it will be 0.25 per successful transaction.

  33. When does the settlement happen?
  34. The cutover of IMPS transactions happens to 23:00 each day. All transactions before this time are included in the settlement for that particular day.

  35. How is the settlement affected?
  36. The settlement is affected by Clearing Corporation of India Ltd. (CCIL) on behalf of NPCI. As a joining procedure, the participating banks need to submit a mandate for crediting and debiting their RTGS accounts with the RBI in favor of CCIL. On the basis of this mandate CCIL affects the settlement.

  37. Are there settlement charges?
  38. Yes, CCIL charges Rs.200 plus taxes (10.3%) per bank per settlement for affecting the settlement. This is charge levied by CCIL that passed on to the banks.

  39. What are the settlement files that a bank can receive from NPCI for IMPS?
  40. For the convenience of banks, the settlement files and reports are developed similar to that of National Financial Switch. The participating banks can download reports from the site using login id and password issued to them by NPCI.
    The bank will get Raw data files, Transaction file, Verification report and Net settlement file from NPCI.

  41. How can a bank raise disputes with reference to IMPS transactions?
  42. The disputes can be raised by participant banks using Dispute Management System provided by NPCI. This service has also been developed similar to NFS for the convenience of participating banks.

  43. Is there an amount limit for the participating banks for their transactions?

    Yes, the limit allocated to the banks is called Net Debit Cap (NDC). The NDC calculated by NPCI at any instant for the IMPS will be net of total outward and inward for the day.  This is the maximum allowable debit for a particular bank for a day. This value is decided on the basis of the participating bank’s contribution to the Settlement Guarantee Fund.
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