UPSC Prelims 2026 paper analysis: subject by subject, compared with 2016 to 2025
Environment had its fewest questions since 2016 and Polity tied its lowest, while world affairs, defence and science had their most. A subject and format breakdown of the 2026 GS Paper I, and what it means for 2027.
Polity and Environment are the subjects most aspirants count on for safe marks. In 2026 they gave fewer questions than in almost any paper since 2016. World affairs, defence and science gave more than in any paper since 2016.
We sorted the 99 questions in our 2026 set into the same subjects and topics as the 992 questions from 2016 to 2025. The 2026 answers on this site come from UPSC’s provisional answer key, for all 99 questions. The final key comes later, and it can change an answer. You can read or sit the 2026 paper as a timed test.
The paper by subject
| Subject | 2026 | Average, 2016 to 2025 | Range, 2016 to 2025 |
|---|---|---|---|
| Economy | 19 | 19.4 | 13 to 25 |
| Science & Tech | 15 | 11.9 | 9 to 14 |
| International relations | 14 | 6.3 | 2 to 10 |
| History | 13 | 13.0 | 7 to 17 |
| Polity | 12 | 18.9 | 12 to 31 |
| Geography | 11 | 10.8 | 5 to 19 |
| Environment | 8 | 15.8 | 11 to 22 |
| Art & Culture | 7 | 3.1 | 1 to 6 |
Three subjects went past their highest count of the last ten papers: Science & Tech, International relations and Art & Culture. One went below its lowest: Environment.
What fell
Environment had 8 questions, the fewest in 11 papers. The previous low was 11, in 2025. It has now fallen three papers running: 15, 15, 11, 8. Pollution & waste, which averaged about 3 questions a paper, had none. Neither did ecology.
Polity had 12, level with 2022 for its lowest. The executive, judiciary, federalism and local government gave no questions at all. Of the 6 questions on governance, laws and schemes, 3 were ethics case studies.
Some topics went blank for the first time. External sector & trade had never given fewer than 2 questions a paper. In 2026 it gave none. Medieval India had never gone below 1. It also gave none.
What rose
International relations had 14 questions. The previous high was 10. India & the world gave 8, against a previous best of 5. Four were on India’s projects and ties abroad, such as river bridges to neighbours and which country hosts which India-built project. Groupings and UN bodies gave 6 more, including the Interpol notice colours and BIMSTEC centres.
Missiles & defence systems gave 6 questions. The ten papers before had 10 between them. It had been climbing already: 3 in 2024, 3 in 2025. The 2026 questions ranged from stealth technology and drone swarms to Mission Sudarshan Chakra and Army Corps headquarters. Science & Tech as a whole reached 15, one more than its previous best.
Money, banking & markets had 10, against a previous high of 7. Financial markets & instruments alone gave 5. This is the rising area we flagged in our post on the must-do areas.
Ancient India gave 8, equal to its best (2020). Half of those were on the Vedic age and the Mahajanapadas, an area that had given 3 questions in the ten papers before. Art & Culture had 7, with 4 on architecture and sculpture.
What held steady
Economy and History barely moved. Economy had 19 against an average of 19.4. History had 13 against 13.0.
Geography matched its average, 11, but the mix changed. Physical geography gave 9 questions in 2024 and 7 in 2025. In 2026 it gave 1. Geography of India gave 5.
The Must-Do Areas held up. The 16 most-repeated subtopics gave 29 questions in 2026. A typical paper has 28.
What was new
Ethics case studies. Three questions described an officer’s situation and asked what the officer should do or which principle they showed. One was about an officer who reports a vaccine supplier cutting corners. None of the ten papers before had a question like this.
Climate of India. Two questions, on the Andaman and Nicobar climate and the Bharat Forecast System, were the first in this subtopic since 2016.
The format mix swung back. The 2023 to 2025 papers had 92 “how many of the above” questions between them. 2026 had 2. The Statement I / Statement II format, with 43 questions in those three papers, did not appear in that form at all. Instead, 68 questions were classic statement sets with a code, the most in 11 papers (the previous high was 62, in 2022). Match-the-pairs questions rose to 9, also the most in 11 papers.
The questions got longer. The average 2026 question, with its statements and options, ran to 81 words. In 2025 it was 68, and in 2016 it was 54.
The paper trends page shows the year-by-year format table and each subject’s share of the paper.
What it means for 2027
1. Don’t drop Polity and Environment, but don’t over-weight them. Both are on a falling trend, not just one bad year. Together they still gave 20 questions in 2026, and Polity had never gone below 12 before.
2. Give defence and world affairs a proper slot. Several 2026 questions were on new missions and standards: Mission Sudarshan Chakra, a BIS standard for bomb disposal systems released in December 2025, and Interpol’s Silver Notice, new in 2025. Keep a short note for each, with who runs it and what it does.
3. Practise every format. “How many” questions went from 47 in 2023 to 2 in 2026. UPSC can switch back without warning. In a “how many” question you can’t rule out options, so you need to know every statement.
4. Practise reading fast. At 81 words a question, a timed mock matters more than before. Sit the 2026 paper against the clock once.
5. Start with the must-do areas. They gave 29 questions even in a paper that changed this much.
Three questions that show the pattern
2026 · Ancient India. Which pairs of ancient and modern river names are correct: Vitasta : Chenab, Asikni : Jhelum, Parushni : Ravi, Yavyavati : Beas? Only Parushni : Ravi (per the provisional key). The trap was that the first two pairs simply swap the Jhelum and the Chenab, which catches anyone who half-remembers them. See the question
2026 · Defence. Which of these are manufactured in India: Su-30 MKI fighter jets, T-90 MK-III tanks, the Akula-class submarine? The jets and the tanks (per the provisional key). The trap was the submarine: India operated an Akula-class boat, but it was Russian-built and leased. See the question
2026 · Ethics case. An officer finds a private vaccine distributor cutting quality, reports it to the vigilance authority and halts the contract. Which principle did the officer show most strongly? Accountability (per the provisional key). The trap was equity, which sounds like citizen welfare, but the action was about answering for misconduct. See the question