GLOBAL PAYMENTS KNOWLEDGEISO 20022 / SWIFT / SEPA / MT / MX
PAYMENTSSIGNAL

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India IMPS — Immediate Payment Service

A rupee transfer that reaches the payee in seconds at any hour, addressed by mobile number, while the banks settle their net positions later in central bank money at the Reserve Bank of India.

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Contributor Shubham Mathure

STEP 1 / 6MESSAGE

Riya instructs Bank Alfa using Arjun's mobile number

Riya (payer) → Bank Alfa (remitter bank)

Riya sends INR 3,000 late at night from her banking app, addressing Arjun by his mobile number and MMID (Mobile Money Identifier) instead of an account number and IFSC.

Step 1 of 6: Riya instructs Bank Alfa using Arjun's mobile number

  1. 01Message
    Riya instructs Bank Alfa using Arjun's mobile numberRiya (payer) → Bank Alfa (remitter bank)
  2. 02Posting
    Bank Alfa debits Riya's accountBank Alfa (remitter bank)
  3. 03Message
    Bank Alfa routes the transfer through the NPCI IMPS switchBank Alfa (remitter bank) → IMPS / NPCI switch
  4. 04Posting
    Nordbank validates and credits Arjun within secondsNordbank (beneficiary bank)
  5. 05Message
    NPCI confirms the transfer succeededIMPS / NPCI switch → Bank Alfa (remitter bank)
  6. 06Settlement
    NPCI settles the net interbank positions at the RBIIMPS / NPCI switch → Reserve Bank of India (settlement)
MESSAGECLEARING OBLIGATIONSETTLEMENTPOSTING
Full step-by-step text (works without JavaScript)
  1. 01Message
    Riya instructs Bank Alfa using Arjun's mobile numberRiya (payer) → Bank Alfa (remitter bank)

    Riya sends INR 3,000 late at night from her banking app, addressing Arjun by his mobile number and MMID (Mobile Money Identifier) instead of an account number and IFSC.

  2. 02Posting
    Bank Alfa debits Riya's accountBank Alfa (remitter bank)

    The remitter bank books the debit on its own ledger straight away, so the amount is committed before the transfer is pushed onto the shared IMPS rail.

    • DR Riya's savings account at Bank Alfa — INR 3,000.00
  3. 03Message
    Bank Alfa routes the transfer through the NPCI IMPS switchBank Alfa (remitter bank) → IMPS / NPCI switch

    In real time the remitter bank sends the transfer to NPCI's IMPS switch, which resolves the mobile number and MMID to the right beneficiary bank and forwards it in seconds.

  4. 04Posting
    Nordbank validates and credits Arjun within secondsNordbank (beneficiary bank)

    The beneficiary bank checks that the mobile number and MMID match a live account, then posts the credit so Arjun sees the money and can spend it immediately, 24/7.

    • CR Arjun's savings account at Nordbank — INR 3,000.00
  5. 05Message
    NPCI confirms the transfer succeededIMPS / NPCI switch → Bank Alfa (remitter bank)

    The switch relays the beneficiary bank's positive response back to Bank Alfa, which tells Riya the payment is complete — this all happens within seconds of her instruction.

  6. 06Settlement
    NPCI settles the net interbank positions at the RBIIMPS / NPCI switch → Reserve Bank of India (settlement)

    The customer already has the money, but the banks square up later: NPCI calculates each bank's net position across many instant transfers and settles the balances in central bank money at the Reserve Bank of India.

    Real-time clearing, deferred net settlement: the credit to Arjun is instant, but interbank finality comes when NPCI's netted positions settle at the RBI — the same pattern other instant retail rails use. IMPS is the rail UPI is built over.

    • DR Bank Alfa net position at RBI — INR 3,000.00
    • CR Nordbank net position at RBI — INR 3,000.00

What this simplifies: This diagram shows one transfer between two banks with a single settlement cycle; in reality NPCI nets many banks' instant transfers together and settles those balances at the RBI on a schedule.

LEARN THE CONCEPTS BEHIND THIS FLOW

Sources for this flow2
  1. Official requirement

    Immediate Payment Service (IMPS) ↗ — National Payments Corporation of India (NPCI)

    Describes IMPS, the NPCI-operated instant interbank electronic funds transfer service available 24/7, addressable by account number and IFSC or by mobile number and MMID. · Checked 2026-07-14

    IMPS is the instant interbank rail that UPI is built over.

  2. Simplified educational illustration

    Payments Signal editorial teaching models — Payments Signal

    This site's own simplified teaching models. · Checked 2026-07-12

    What this simplifies: One remitter bank, one beneficiary bank, and a single netting cycle stand in for a national network of banks and many settlement batches; exact settlement timings and MMID mechanics are described in plain terms.

    Used wherever diagrams, scenarios, figures, or example values are didactic constructions rather than sourced facts; every such use carries a simplifications disclosure. All people, companies, banks, and list entries in examples are fictional.