Payments NPCI UPI IMPS payments RBI RuPay BBPS

NPCI and Indian payments infrastructure

From WebNotes, a public knowledge base. Last updated . Reading time ~16 min.

The National Payments Corporation of India (NPCI) is the umbrella organisation that operates India’s retail payments and settlements infrastructure. Incorporated in 2008 under Section 25 of the Companies Act 1956 (now Section 8 of the Companies Act 2013) as a not-for-profit company, NPCI is jointly owned by ten major commercial banks and operates under the supervision of the Reserve Bank of India (RBI) and the Indian Banks’ Association. NPCI’s mandate is to consolidate and integrate retail payment systems in India and to operate them as utilities serving member banks and end-users.

The payment systems NPCI operates have become the rails on which most non-cash retail transactions in India clear. The Unified Payments Interface (UPI) processed approximately 17 billion transactions worth more than Rs 24 lakh crore in a single month (April 2025), making it the single largest real-time retail payment system globally by volume. The Immediate Payment Service (IMPS) , NEFT , RTGS , Aadhaar Enabled Payment System (AePS) , Bharat Bill Payment System (BBPS) , RuPay card network, and FASTag for highway tolls together cover almost the entire spectrum of retail payment use cases.

This article serves as an editorial hub on the Indian payments infrastructure, organised by the structural questions a serious participant needs answered: how NPCI is constituted, what each payment rail does, how the rails clear and settle, what the cost structure is, how RBI regulates the framework, and how the rails intersect with mutual fund and stockbroking operations. Per-rail mechanics, per-product flows, and operational how-to guides live on the linked spoke articles.

NPCI organisational structure

Ownership and governance

NPCI is owned by ten promoter banks: State Bank of India, Punjab National Bank, Canara Bank, Bank of Baroda, Union Bank of India, Bank of India, ICICI Bank, HDFC Bank, HSBC, and Citibank. Subsequent expansion has added more bank shareholders, but the founding ten retain a special role on the board. The board includes representatives from the RBI as observers.

NPCI operates as a not-for-profit entity. Surpluses are reinvested in infrastructure and member-bank rebates rather than distributed as dividends. The cost structure for member banks is per-transaction interchange and switching fees, with subsidies on selected high-policy-priority transactions (notably UPI peer-to-peer transfers under Rs 2,000).

Regulatory umbrella

NPCI operates under the Payment and Settlement Systems Act 2007 which gives the RBI statutory authority over payment systems in India. RBI has the power to authorise payment systems, regulate participants, and prescribe operational parameters including interchange, transaction limits, and consumer protections.

The major regulatory pillars are:

  • RBI Master Direction on Prepaid Payment Instruments (PPIs) governing wallet-based payment instruments.
  • RBI directions on Tokenization of Card Transactions governing card-on-file and device-based payment tokens.
  • RBI Framework on Recurring Payments and e-Mandates governing the UPI mandate and bank-app-based UPI 2.0 mandates .
  • NPCI operating circulars issued under RBI supervision for each payment rail.

The major payment rails

Unified Payments Interface (UPI)

UPI , launched in April 2016, is the real-time retail mobile-payment rail that has come to dominate Indian non-cash transactions. The core architecture uses a virtual payment address (VPA, of the form user@bank) layered on top of IMPS, abstracting away the underlying bank account details. UPI transactions are interbank, real-time, 24x7, and use second-factor authentication via UPI PIN on the user’s registered device.

UPI use cases relevant to capital markets and investing:

The third-party UPI apps (Google Pay, PhonePe, Paytm, BHIM, WhatsApp Pay) interoperate through NPCI’s UPI switch. The how-to series on UPI mandates covers app-specific approval flows.

Immediate Payment Service (IMPS)

IMPS , launched in November 2010, is the original 24x7 real-time interbank transfer rail. IMPS predates UPI and continues to operate as the foundation on which UPI is built. IMPS transactions are routed through NPCI’s central switch with banks holding settlement accounts at the RBI.

IMPS transaction limits are per-day Rs 5 lakh on mobile-banking channels and Rs 2 lakh on net-banking. The how to add funds via IMPS details broker-funding flows.

IMPS is increasingly superseded by UPI for retail flows because UPI offers a simpler user experience and lower failure rate. IMPS remains the rail of choice for higher-value transactions above UPI’s Rs 5 lakh per-day limit and for specific institutional flows.

NEFT and RTGS

NEFT (National Electronic Funds Transfer) and RTGS (Real-Time Gross Settlement) are the older interbank funds transfer rails. NEFT operates in half-hourly batch settlement cycles 24x7 (since December 2019 when RBI extended NEFT to round-the-clock operation), while RTGS settles each transaction individually in real time and is now also 24x7 since December 2020.

Distinguishing parameters:

ParameterNEFTRTGS
Minimum amountNo minimumRs 2 lakh
Maximum amountNo maximumNo maximum
SettlementHalf-hourly batchReal-time gross
Operational hours24x724x7
Channel chargesFree on net bankingFree on net banking; fees on branch

RBI removed all charges on NEFT and RTGS transactions through online channels from January 2020, making the rails effectively free for retail and institutional users.

Aadhaar Enabled Payment System (AePS)

AePS allows financial transactions at a micro-ATM or banking correspondent using Aadhaar number plus biometric authentication, without requiring a debit card or PIN. AePS is the rail that brings basic banking services to last-mile rural populations through banking correspondents in villages and small towns. Transactions include cash deposit, cash withdrawal, balance enquiry, fund transfer, and Aadhaar-based payment.

AePS is operationally tied to the Aadhaar identity infrastructure for authentication and uses NPCI’s settlement infrastructure for clearing.

Bharat Bill Payment System (BBPS)

BBPS is the centralised bill-payment infrastructure for India, launched in 2017 and operationalised across electricity, water, gas, telecom, DTH, education, insurance premium, mutual fund SIP, and credit card bill categories. Consumers can pay bills through a single interoperable interface accessible via any bank app, third-party UPI app (Google Pay, PhonePe, Paytm), or BBPS agent network.

BBPS includes mutual fund SIP and insurance premium payment categories, providing an alternative to direct AMC or insurance company portals for recurring payments.

RuPay card network

RuPay is the domestic card payment network launched by NPCI in 2012 to compete with Visa and MasterCard. RuPay debit cards are issued by most Indian banks and accepted across all domestic ATM and PoS networks. Recent expansion has added RuPay credit cards and RuPay JCB-co-badged cards for international acceptance.

RuPay has been a focus of policy debate around interchange fees and zero-MDR (merchant discount rate) directives that compress merchant-acquiring economics.

FASTag

FASTag is the RFID-based highway-toll-payment system operationalised across the national highway network. FASTag tags are issued by banks (HDFC Bank, ICICI Bank, SBI, Paytm Payments Bank historically, and others) and read at toll plazas, with toll deduction debited automatically from the linked account. FASTag rolled out nationwide and became mandatory at most toll plazas from December 2019.

How transactions clear and settle

The NPCI rails follow a common architecture pattern: NPCI operates a central switch, banks maintain settlement accounts at the RBI, and net-settlement obligations are reconciled at end of each settlement cycle.

UPI clearing

A UPI transaction from User A (Bank X) to User B (Bank Y) proceeds as follows:

  1. User A initiates payment in their UPI app (sender bank’s or third-party).
  2. The app validates the user via UPI PIN.
  3. The transaction request reaches the UPI switch operated by NPCI.
  4. NPCI debit-authorises with Bank X (sender bank).
  5. NPCI credit-authorises with Bank Y (receiver bank).
  6. On both confirmations, the transaction succeeds and both banks update their books in real time.
  7. Net-settlement between Bank X and Bank Y occurs at the RBI through deferred net-settlement in batch.

The user sees an instantaneous transaction. The interbank settlement happens behind the scenes through RBI’s RTGS infrastructure.

Failure handling

UPI transactions can fail at any stage from PIN validation through bank credit. NPCI prescribes failure-handling SLAs (typically within 24 hours for reversal of failed transactions) and operational rules for chargeback. The historical issues around UPI failure rates and partial-completion (where Bank X debited but Bank Y didn’t credit) have been progressively resolved through RBI directives mandating automatic reversal within prescribed windows.

Cost structure and policy debates

Zero MDR on UPI peer-to-peer

The Indian government mandated zero merchant discount rate (MDR) on UPI peer-to-peer transactions in January 2020. This means that merchants accepting UPI payments do not pay any interchange or switching fee, and consequently no fee is passed on to consumers. The policy was extended to RuPay debit card transactions for small merchants.

The zero-MDR mandate has been controversial. It has driven mass adoption of UPI but has constrained the revenue model for payment service providers (banks, third-party app operators, NPCI itself). Periodic policy debates resurface around reintroducing a small interchange fee for high-value or merchant transactions.

Cost to banks and third-party providers

While end-users pay zero MDR on UPI, NPCI charges member banks a per-transaction switching fee, and acquirer banks bear card-network and operational costs. These costs are absorbed in the broader banking economics rather than passed to consumers.

Third-party UPI apps (Google Pay, PhonePe, Paytm, BHIM) operate on monetisation channels adjacent to the payment itself: lending, merchant discovery, insurance distribution, and advertising. The base UPI transaction generates no direct revenue for the app.

Intersection with capital markets workflows

Mutual fund SIPs

Most retail mutual fund SIPs in India are debited through either UPI autopay or bank e-mandates routed through NPCI’s National Automated Clearing House (NACH). The UPI autopay for SIP framework operationalised through UPI 2.0 mandates supports per-SIP value caps up to Rs 1 lakh per transaction.

The NACH e-mandate framework is the older infrastructure underlying bank-mandate-debited SIPs.

IPO applications

UPI ASBA is the dominant IPO subscription mechanism for retail investors. The investor authorises a UPI mandate to block funds in their bank account during the IPO subscription period; on allotment the funds are debited; on non-allotment the block lifts. The mechanism is fully integrated with the IPO process in India and supported by every major UPI app.

Broker funding

Adding funds to a Zerodha, Groww or other broker account proceeds primarily through UPI (instant) or IMPS/NEFT/RTGS for larger amounts. The how to add funds to Zerodha via UPI and via NEFT/RTGS/IMPS cover the broker-specific flows. UPI has displaced bank transfer for the majority of retail broker funding because of the instant settlement and zero fee.

RBI’s role and recent reforms

RBI regulates the payment systems space under the Payment and Settlement Systems Act 2007. Major recent RBI directives:

  • 24x7 RTGS from December 2020.
  • 24x7 NEFT from December 2019.
  • Tokenization of card transactions mandate operational from October 2022, requiring card-on-file replacement with bank-issued tokens.
  • PA-PG framework governing payment aggregators and gateways from March 2020.
  • Recurring payments framework governing UPI mandates and card-based recurring payments from October 2021.

RBI also issues periodic guidance on cross-border payments (e-rupee, CBDC pilots), interoperability between wallets and bank accounts, and the regulatory perimeter around new payment innovations.

See also

External references

References

  1. National Payments Corporation of India, organisational and operational disclosures, npci.org.in, accessed May 2026.
  2. Payment and Settlement Systems Act 2007, indiacode.nic.in.
  3. Reserve Bank of India Master Directions and circulars on payment systems, rbi.org.in.
  4. NPCI UPI specification documents and operating circulars.
  5. NPCI monthly statistics on UPI, IMPS, RuPay, FASTag, BBPS transaction volumes.
  6. RBI Annual Reports on payment system trends.
  7. CMS and Worldline India Digital Payments Reports for industry-level data on transaction volumes and category mix.

Related articles

Reviewed and published by

WebNotes Editorial Team

The WebNotes Editorial Team covers Indian capital markets, payments infrastructure and retail investor procedures. Every article is fact-checked against primary sources, principally SEBI circulars and master directions, NPCI specifications and the official support documentation published by the intermediary in question. Drafts go through a second-pair-of-eyes review and a separate compliance read before publication, and revisions are tracked against the SEBI and NPCI rule changes referenced in the methodology section.

Last reviewed
Conflicts of interest
WebNotes is independent. No relationship with any broker, registrar or bank named in this article.