Archive · 15 Sep 2026
UPSC Key Covers UPI, Inflation, Science, UCC and Hindi
This UPSC study guide explains several important issues in India and around the world.
The government says small UPI payments and RuPay debit-card payments should not have extra charges.
Bigger business payments may still lead to a debate about fees called Merchant Discount Rate.
Prices rose in August, especially for food and sugar, so the RBI may consider raising interest rates.
El Niño weakened the monsoon and created uneven rainfall across India.
Scientists in Bengaluru found a possible simpler way to protect delicate quantum computer states.
Researchers also used Chandrayaan-1 data to identify a very old impact basin on the Moon.
The guide discusses whether states can introduce their own Uniform Civil Codes.
It also explains how India chose Hindi as an official language while continuing to use English and respecting linguistic diversity.
The Finance Ministry barred charges on UPI transactions up to Rs 2,000 and RuPay debit-card payments, while debate continues over MDR for higher-value merchant transactions.
August retail inflation rose to 4.82%, food inflation reached 5.95%, and a possible RBI rate hike will be considered at the October MPC meeting.
A strong El Niño contributed to erratic monsoon rainfall, with cumulative rainfall 14.7% below the long-period average as of September 13.
Raman Research Institute scientists developed a single-shot technique that may delay quantum decoherence and improve the reliability of quantum computations.
The UPSC key also examines a possible ancient lunar impact basin, state-level UCC implementation, and the Constituent Assembly’s compromise on Hindi and English.
- Who
- The Ministry of Finance, Reserve Bank of India, National Payments Corporation of India, Indian scientists, planetary researchers, state governments, and Constituent Assembly leaders are central to the topics.
- What
- The September 15 UPSC key covers UPI charges, inflation, El Niño and food prices, quantum decoherence, lunar geology, the Uniform Civil Code, and Hindi’s constitutional status.
- When
- The developments and data discussed are dated around September 2026, with Hindi Diwas observed on September 14 and the UPSC key issued for September 15, 2026.
- Where
- The issues concern India, including Bengaluru and Ahmedabad, while the lunar research concerns the Moon and the quantum topic concerns research at Raman Research Institute.
- Why
- They are highlighted because they relate to UPSC Preliminary and Main Examination subjects including economy, polity, geography, science and technology, and constitutional governance.
Public Utility, Pluralism and Gradual Reform
Commercial Sustainability, Uniformity and Stronger Integration
UPI pricing
Public Utility, Pluralism and Gradual Reform
UPI should remain broadly free, particularly for small users and merchants, to support inclusion and digital-payment adoption.
Commercial Sustainability, Uniformity and Stronger Integration
Higher-value merchant transactions may need an MDR because payment providers report rising infrastructure costs and financial unsustainability without such revenue.
Uniform Civil Code
Public Utility, Pluralism and Gradual Reform
Reforms should protect religious, customary and tribal diversity, and the 2018 Law Commission view favoured addressing discriminatory provisions without imposing absolute uniformity.
Commercial Sustainability, Uniformity and Stronger Integration
Supporters argue that common civil rules can advance equality and fulfil the constitutional objective in Article 44; BJP-ruled states can begin the process before a possible central law.
Language policy
Public Utility, Pluralism and Gradual Reform
National unity does not require linguistic uniformity, and continued use of English and regional languages protects India’s diversity.
Commercial Sustainability, Uniformity and Stronger Integration
Hindi-speaking representatives argued that a common language and script would strengthen national unity and reduce reliance on English.
- UPI charge rule
- Banks and system providers cannot impose charges on UPI transactions up to Rs 2,000 or RuPay debit-card payments.
- UPI scale in 2025-26
- More than 24,000 crore UPI transactions worth Rs 314 lakh crore were recorded.
- August CPI inflation
- Headline retail inflation rose to 4.82% from 4.45% in July; food inflation rose to 5.95%.
- Monsoon performance
- All-India rainfall was 14.7% below the long-period average as of September 13, with 24 of 36 meteorological subdivisions recording deficiencies above 10%.
- Quantum research
- Raman Research Institute scientists demonstrated a single-shot operation intended to delay or prevent the collapse of quantum entanglement.
- Lunar finding
- Researchers identified the Australe Basin using Chandrayaan-1 mineralogical data and suggested it may be older than the South Pole-Aitken Basin.
- UCC status
- Uttarakhand, Gujarat, Assam and Madhya Pradesh have passed UCC legislation, but Uttarakhand is the only state where it is currently in force.
- Language framework
- The Munshi-Ayyangar formula led to the constitutional framework in Articles 343–351, with Hindi and English continuing as official languages.