3.1 E-Payment Overview & EFT

What is an Electronic Payment System?

Electronic Payment System (EPS) is the paperless transfer of funds from one party to another over electronic networks — without using cash, cheques or physical instruments.

The 4 actors in any e-payment

Every electronic payment, whether a ₹50 chai-stall UPI transfer or a ₹50-crore RTGS, has the same four core actors. The payer (also called the customer or remitter) is the person or business initiating the payment. The payee (the merchant or beneficiary) is the one receiving it. The issuer is the payer's bank — it holds the payer's money and authorises the debit. The acquirer is the payee's bank — it credits the merchant account and provides the merchant with payment-acceptance services.

Around these four sit a handful of intermediaries that the customer rarely sees. Card networks (Visa, Mastercard, RuPay, Amex) operate the rails for card transactions and route messages between issuer and acquirer. Payment gateways (Razorpay, PayU, Stripe) plug merchants into all the payment methods through a single API. Payment switches — most importantly NPCI (National Payments Corporation of India) — route transactions between banks for UPI, IMPS, AePS and RuPay. And the regulator, in India the Reserve Bank of India (RBI), sets the rules, issues licences, and oversees system integrity.

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Why e-payment systems matter

Cash vs e-payment in India

India transitioned from cash-dominated to mobile-payment-dominated in under 10 years — largely thanks to UPI (2016).

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Categories of E-Payment Systems

                Electronic Payment Systems
                          │
   ┌──────────────────────┼──────────────────────┐
   │                      │                      │
Account-based       Token-based            Stored-value
   │                      │                      │
   ├ Credit Cards        ├ Digital Cash      ├ Smart Cards
   ├ Debit Cards         ├ Digital Cheques   ├ Mobile Wallets
   ├ NEFT/RTGS/IMPS      ├ Cryptocurrency    ├ Prepaid Cards
   ├ UPI                 │                   │
   └ Net Banking         │                   │

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Properties of a Good E-Payment System (IPU favourite)

The K.K. Bajaj textbook lists six required properties:

Other desirable properties:

• Scalability (millions of txns/day)
• Low cost (< 1% per txn)
• Interoperability (works across banks)
• Acceptability (widely accepted by merchants)
• Anonymity (some forms — cash, certain wallets)

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Electronic Funds Transfer (EFT)

EFT is the electronic transfer of money from one bank account to another. In India, three flagship systems:

1. NEFT — National Electronic Funds Transfer

2. RTGS — Real-Time Gross Settlement

3. IMPS — Immediate Payment Service

Comparison — NEFT vs RTGS vs IMPS

PYQ pattern (very common): "Differentiate NEFT, RTGS and IMPS." — Tabulate the 5-6 differences (settlement, min/max, operator, cost, channel).

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Other Indian electronic funds transfer methods

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Cross-border EFT

SWIFT vs UPI International

The two systems serve very different needs. SWIFT (the Society for Worldwide Interbank Financial Telecommunication, operational since 1973) is the legacy messaging network used by 11,000+ banks globally for high-value, multi-currency B2B transfers. A SWIFT payment typically takes 1–5 business days to settle (because it passes through correspondent banks) and costs US$ 20–60 per transaction. UPI International (launched 2023 onwards by NPCI International Payments Limited, NIPL) flips the model: it lets Indian travellers and merchants transact in real time across partner geographies (UAE, Singapore, France, UK, Sri Lanka, Mauritius) at near-zero cost. UPI International is built for retail remittance and tourist payments; SWIFT remains the rail for large corporate flows.

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Key Terms — Lesson 3.1

The payments world is acronym-heavy. The terms below appear in every Indian-payments PYQ and are the working vocabulary of any fintech or e-commerce team.

Electronic Payment System (EPS) — Any system that lets parties transfer value digitally, without using physical cash, cheques or demand drafts. EPS spans card payments, EFT (NEFT/RTGS/IMPS/UPI), wallets, internet banking, AePS, and emerging instruments like CBDCs. EPS depends on a layered ecosystem: banks (issuer, acquirer), networks (Visa, NPCI), gateways, and the regulator (RBI).

Payer / Customer — The person or business initiating a payment. Also called the "remitter" in EFT vocabulary or the "cardholder" in card vocabulary.

Payee / Merchant — The person or business receiving a payment. Also called the "beneficiary" in EFT vocabulary.

Issuing Bank (Issuer) — The payer's bank, which holds the payer's account and authorises the debit. For a credit card transaction, the issuer is the bank that issued the card to the customer (HDFC, ICICI, SBI Cards, etc.). For UPI, it is the bank linked to the payer's UPI ID.

Acquiring Bank (Acquirer) — The merchant's bank, which receives the payment and credits the merchant account. The acquirer also handles merchant onboarding, KYC, and (for card payments) provides the POS terminal or payment-gateway integration.

Card Network / Card Scheme — The international or domestic network that routes card payment messages between issuer and acquirer and sets the rules for card transactions. The four big networks active in India are Visa, Mastercard, American Express, and RuPay (an NPCI-built domestic network now active in 60+ countries via bilateral agreements).

NPCI (National Payments Corporation of India) — The umbrella organisation that operates India's retail payment systems — UPI, IMPS, AePS, RuPay, NETC FASTag, NACH, BBPS. NPCI is a not-for-profit, owned by Indian banks, regulated by RBI.

RBI (Reserve Bank of India) — The central bank and regulator of India's payments and banking system. RBI sets the rules for NEFT/RTGS, licences payment aggregators, mandates 3D-Secure, and oversees NPCI. Most major Indian payment changes (free NEFT, card tokenisation, UPI launch) trace back to an RBI policy decision.

EFT (Electronic Funds Transfer) — Generic term for bank account-to-bank account electronic money movement. India's flagship EFT systems are NEFT, RTGS, and IMPS. The term has slightly fallen out of fashion in Indian retail because UPI replaced most personal-EFT use cases.

NEFT (National Electronic Funds Transfer) — RBI-operated, batch-based EFT system started in 2005. Settles in 30-minute batches (24×7 since December 2019), no minimum or maximum amount, free for online transfers. Best for routine business payments — salary, rent, vendor invoices.

RTGS (Real-Time Gross Settlement) — RBI-operated, real-time gross settlement system for high-value transfers (₹2 lakh minimum, no maximum). Each transaction settles individually and immediately, no batching. Free for online channel since 2019; 24×7 since December 2020. Used for property purchases, large B2B settlements, M&A consideration.

IMPS (Immediate Payment Service) — NPCI-operated, real-time, 24×7 mobile-first EFT system started in 2010. Maximum ₹5 lakh per transaction, no minimum. Banks may charge a small fee. IMPS was the immediate predecessor of UPI and laid the technical groundwork for it.

Gross Settlement vs Net Settlement — Two ways of settling a batch of transactions. Gross settles each transaction individually and immediately (RTGS). Net computes the net amount each bank owes to every other bank at the end of a batch and settles only those nets (NEFT). Gross is safer (no inter-bank credit risk) but more capital-intensive; net is efficient but accumulates risk during the batch window.

AePS (Aadhaar-enabled Payment System) — NPCI's payment system that uses Aadhaar number + biometric (fingerprint) to authorise transactions, instead of a card or PIN. AePS is the workhorse of last-mile banking in rural India — village-level Banking Correspondents (BCs) use AePS-enabled handheld devices to deliver cash withdrawals, balance checks and DBT receipts in areas without ATMs.

NACH (National Automated Clearing House) — NPCI-operated batch system for bulk recurring transactions — salary deposits, DBT, SIPs, EMIs, utility bill auto-debits. NACH replaced the older ECS (Electronic Clearing Service) system and is the rail behind most "auto-debit" arrangements in India.

e-Mandate — A digital authorisation that lets a merchant or service provider debit the customer's account on a recurring basis (e.g., a Netflix monthly fee, a SIP, a loan EMI), replacing the older paper NACH/ECS mandate. e-Mandate uses online auth (UPI Autopay, debit/credit card recurring, net banking e-mandate).

SWIFT (Society for Worldwide Interbank Financial Telecommunication) — The global, bank-to-bank messaging network for international payments and confirmations, founded 1973. SWIFT itself does not move money — it carries instructions between banks who then settle through correspondent banking relationships. Connects 11,000+ banks; well known for slow speed (1–5 days) and high cost ($20–$60+) per transfer.

UPI International / UPI Global — NPCI International Payments Limited (NIPL) initiative to make UPI usable across borders. As of 2024–25, accepted in UAE, Singapore, France, UK, Sri Lanka, Mauritius, Bhutan and growing — for Indian travellers and NRIs to make merchant payments and remittances in real time at near-zero cost.

Non-repudiation — The cryptographic property that prevents either party from later denying that a transaction took place. Digital signatures, audit trails, and double-entry logs at issuer and acquirer all contribute to non-repudiation. It is one of the six required properties of an e-payment system in the IPU textbook.

Authentication — Verifying that the parties to a transaction are who they claim to be. In card payments: PIN, 3D-Secure OTP, CVV. In UPI: device binding + UPI PIN. In banking: password + OTP + sometimes biometric. Authentication is what stops a stolen card from being used.

Authorisation — The decision made by the issuer to approve or decline a transaction, after authentication. Authorisation checks account balance/credit limit, fraud signals, velocity patterns, and merchant-category restrictions. A transaction can be authenticated successfully but declined at authorisation.

Settlement — The actual movement of money between bank accounts after a transaction is approved. Settlement may be instantaneous (RTGS, IMPS, UPI) or deferred (NEFT batch, card schemes settling next business day, COD waiting for the courier to remit cash). Settlement timing is a major operational concern for merchants because it determines cash flow.

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Study deep

1. Account-based payments dominate India. Unlike China (Alipay/WeChat Pay wallets), India is mostly account-to-account via UPI. This means lower wallet float in the system and bank-led innovation.

1. NEFT's batch model has scaling implications. Each batch processes thousands of transactions in one settlement window. Operationally simpler but not real-time. UPI processes 16 billion individual real-time settlements per month.

1. RTGS's ₹2 lakh minimum. Designed for high-value transactions to avoid stressing the real-time settlement system. Today, most retail transfers under ₹5 lakh use IMPS or UPI; over ₹5 lakh use RTGS.

1. The 2019 RBI free-online mandate. RBI eliminated NEFT and RTGS charges for online channels in July 2019 — boosting adoption. Banks recover costs via float and other fee income.

1. EFT is invisible plumbing. A user who does net banking → IMPS transfer doesn't think "I'm using an EFT system" — they think "I sent money." Good plumbing is invisible.

PYQ pattern: "What is an electronic payment system? List its components and properties." — Define, list 4 actors (payer, payee, issuer, acquirer), list 6 properties (privacy, integrity, auth, non-repudiation, authorisation, settlement).

PYQ pattern: "Explain different methods of EFT in India." — NEFT, RTGS, IMPS, NACH, AePS — table with operator, settlement, min/max, cost.