Unified Payments Interface (UPI)

The Unified Payments Interface, or UPI, is an Indian system that lets you send money from one bank account to another instantly, using just a mobile phone. You do not need to know the other person's account number or IFSC code. You only need their UPI ID, their mobile number or a QR code. It works 24 hours a day, every day of the year, and the money moves in seconds.

Why does India need UPI?

Before UPI, sending money was slow or costly. A bank transfer needed long account details. Cards needed a machine at the shop, and shops paid a fee for each card payment. Most small shopkeepers, like your local vegetable seller, could not accept digital payments at all. UPI solved this. A small QR code sticker is all a shop needs. This has helped bring millions of small traders and ordinary people into the formal banking system.

Where did it come from?

UPI was built by the National Payments Corporation of India (NPCI). NPCI was set up on 19 December 2008 by the Reserve Bank of India (RBI) and the Indian Banks' Association (IBA). It is a not-for-profit company registered under Section 8 of the Companies Act, 2013. It works under the Payment and Settlement Systems Act, 2007, the law that lets the RBI regulate payment systems.

UPI had its pilot launch on 11 April 2016, with 21 member banks, by the then RBI Governor, Dr Raghuram G. Rajan, in Mumbai. Banks began putting UPI apps on app stores from 25 August 2016. Its use grew very fast after demonetisation in November 2016 and during the Covid-19 pandemic.

How does a UPI payment work?

Think of UPI as a common road that connects all banks. Here is what happens when you pay ₹200 at a tea stall:

1. You scan the shop's QR code in your UPI app (for example BHIM, PhonePe or Google Pay).
2. The app sends the request to NPCI's UPI system.
3. NPCI asks your bank to take ₹200 from your account. You confirm with your secret UPI PIN.
4. NPCI tells the shop's bank to add ₹200 to the shop's account.
5. Both of you get a message within seconds.

The app on your phone is only a doorway. The money always stays in bank accounts. Apps like PhonePe and Google Pay are called Third-Party App Providers (TPAPs). They must work through a partner bank.

The key parts and facts

• Types of payment: Person-to-Person (P2P), such as sending money to a friend, and Person-to-Merchant (P2M), such as paying a shop.
• UPI 123PAY: Launched on 8 March 2022 so that people with basic feature phones (without internet) can use UPI.
• UPI Lite: A small on-device wallet for very small, quick payments without entering a PIN each time.
• Scale: In August 2026, UPI handled a record 24.51 billion transactions in one month, worth about ₹29.82 lakh crore. That is about 791 million transactions a day.
• Market share cap: In November 2020, NPCI proposed that no single app should handle more than 30% of UPI transactions. The deadline has been extended more than once; the latest deadline is 31 December 2026. As of late 2024, two apps (PhonePe and Google Pay) handled over 85% of UPI payments.

Who pays for UPI? The MDR question

When a shop accepts a digital payment, banks usually charge the shop a small fee called the Merchant Discount Rate (MDR). From 1 January 2020, the law set MDR at zero for UPI and RuPay debit card payments. This was done through Section 10A of the Payment and Settlement Systems Act, which was linked to Section 269SU of the Income Tax Act.

Both were added by the Finance (No. 2) Act, 2019. Section 269SU makes businesses with a turnover above ₹50 crore offer these electronic payment modes. Section 10A stops banks and payment system providers from charging for them.

To make up for the lost fee, the government pays banks an incentive for small payments. For example, the Cabinet approved an incentive scheme of ₹1,500 crore for 2024-25. It paid banks 0.15% of the value of UPI payments up to ₹2,000 made to small merchants.

In 2026, Parliament changed Section 10A through the Taxation and Other Laws (Amendment) Act, 2026. Now the Central Government can decide by notification which payments stay free. A Finance Ministry notification of 14 September 2026 keeps RuPay debit card payments and UPI payments up to ₹2,000 free of any charge.

An NPCI circular of 15 September 2026 then set the fees for larger merchant payments, due to start on 15 October 2026:

• Standard rate: 0.4% on Person-to-Merchant payments above ₹2,000, capped at ₹300. The cap is reached at a payment of ₹75,000.
• Essential services: a flat ₹5 per payment above ₹2,000 for railways, telecom, insurance, fuel and agricultural inputs.
• Capital markets: 0.02% (capped at ₹300) for mutual fund and stockbroking payments.
• Exempt: all Person-to-Person transfers, merchant payments up to ₹2,000, and small merchants who receive up to ₹1 lakh a month through UPI QR codes.

On 13 October 2026, NPCI put the fee off until after Diwali; the new start date is to be notified separately. Finance Ministry data suggest the fee would touch only about 4% of merchant payments, so about 96% stay free. The government has said merchants, not customers, bear this charge.

How does UPI work outside India?

NPCI set up a subsidiary, NPCI International Payments Limited (NIPL), on 3 April 2020, to take UPI and RuPay abroad. UPI works outside India in two main ways:

• Merchant acceptance: Indian tourists can pay at shops abroad by scanning a QR code with their Indian UPI app.
• System-to-system linkage: India's UPI is joined to another country's own fast payment system, so people in both countries can send money to each other instantly. The first such link was UPI-PayNow with Singapore, which went live in February 2023.

For the UAE, the RBI and the Central Bank of the UAE signed an MoU on 15 July 2023. It covers linking UPI with the UAE's Instant Payment Platform (IPP), known as AANI, and linking the RuPay card switch with UAESWITCH. As of 2026, UPI-based payments are live in countries including the UAE, Singapore, Bhutan, Nepal, Sri Lanka, France, Mauritius and Qatar, with more being added.

Commonly confused concepts

• UPI vs IMPS: Both are instant, 24x7 systems run by NPCI. IMPS (Immediate Payment Service) usually needs an account number and IFSC. UPI adds simple IDs, QR codes and one app for many bank accounts.
• UPI vs NEFT and RTGS: NEFT and RTGS are run by the RBI itself, not by NPCI. RTGS is meant for large amounts (minimum ₹2 lakh).
• UPI vs a prepaid wallet: In a wallet, you first load money into the wallet company. In UPI, money moves directly between bank accounts.
• UPI vs CBDC (the digital rupee, e₹): UPI is only a payment channel that moves bank money. The e₹ is itself money, issued directly by the RBI.
• NPCI vs RBI: The RBI is the regulator. NPCI is the operator that runs the systems.

Issues, criticism and the way forward

• Concentration risk: When two apps handle most payments, an outage at one can hit crores of people. The 30% cap is meant to fix this, but it has been delayed again and again.
• Cost of running the system: With zero MDR, banks and apps earned little from UPI. Some experts argue this slowed investment in the system. The government's position was that free UPI drove mass adoption. The 2026 MDR on large merchant payments tries to balance both views, though some trader bodies have asked for a rollback.
• Fraud and cyber safety: Fast payments also mean fast fraud, such as fake QR codes and "collect request" scams. Better user awareness and stronger checks are needed.
• Global expansion: Linking UPI with other countries lowers the cost of sending money home for Indians working abroad. But each link needs agreements with foreign central banks, which takes time.

Concepts to Know

• QR code: A square pattern of black and white boxes that stores information, such as a shop's UPI ID. Your phone camera reads it.
• UPI PIN: A secret 4 or 6 digit number that you set. It works like an ATM card PIN and approves each payment.
• Merchant Discount Rate (MDR): The fee a shopkeeper's bank charges for accepting a digital payment. It is shared among banks and the payment network.
• Remittance: Money sent home by people working in another country.
• Section 8 company: A company set up for a not-for-profit purpose, such as promoting commerce or social welfare. It does not share profits with its owners.