UPSC Mains PYQ Topic-wise (2013–2025): Paper-wise Weightage Map

Prelims rewards coverage. Mains rewards anticipation. You have roughly seven minutes per answer and no time to think from first principles, so the questions you have already half-written in your head are the ones that score. That makes the previous-year papers more valuable in Mains than in Prelims, not less — they are the closest thing to a list of what you will be asked.

Our Mains bank holds 1,066 questions: every GS-1, GS-2, GS-3 and GS-4 question and every essay topic from 2013 through 2025. This page classifies them by syllabus theme and prints what the distribution looks like.

One methodological note up front, because it changes how you should read the tables. Unlike our Prelims analysis, where each question carries a subject tag applied at entry, Mains questions had to be classified by theme after the fact. Mains questions are deliberately cross-cutting — a question about urban flooding is simultaneously geography, disaster management and governance — so a single label is always a simplification. Where no single syllabus clause clearly owns a question, we have labelled it “cross-cutting” rather than forcing it into a bucket. That residual runs between 5% and 12% depending on the paper, and it is a finding in itself.

The Four Papers Are Not Built the Same Way

Before the theme tables, the structural facts that most aspirants never check:

GS-1 to GS-3 share an identical architecture. GS-4 does not: its questions carry 20, 25 and 30 marks, and 132 of its 166 are 20-markers. Of those, 78 — 47% of the whole paper — are case studies. Nearly half of GS-4 is not a knowledge test at all. If your ethics preparation is a set of definitions and thinker summaries, you are preparing for the smaller half of the paper.

GS-1: Society and Geography, Not History

Geography in its three forms — Indian, physical, and economic/industrial location — is 31.9% of GS-1, comfortably the largest block. Add urbanisation, which is a settlement-geography clause in all but name, and it is 37.4%.

Meanwhile modern, world and ancient/medieval history together come to 20.4% (24.4% if you count post-independence India as history), and ancient and medieval India on their own are 4.1% — about one question a year. The same pattern we found in Prelims repeats here: the ancient and medieval periods are asked, but through Art & Culture, which is a further 14.1%.

The other finding worth sitting with: Indian society is the single largest theme at 19.3%. Gig economy and women’s empowerment, tribal sex ratios, secularism, globalisation and consumer culture, the socialisation of children — these are questions with no textbook and no fixed answer, and they are the most-asked thing in GS-1. Aspirants who treat GS-1 as “history plus geography” are misreading a fifth of the paper.

GS-1 questions asked per year, live from the question bank:

Detail guides: Modern History PYQs for Mains, Geography PYQs for Mains, Art and Culture PYQs for Mains.

GS-2: International Relations Is the Biggest Single Theme

International relations is the most stable theme in the entire Mains examination. Look at the year row: 8, 4, 4, 4, 4, 5, 3, 3, 4, 4, 4, 4, 4. After an unusual 2013, it has been four questions a year, almost every year, for a decade. Nothing else in Mains is that predictable.

That predictability is actionable. You can be near-certain of roughly four IR questions, and the sub-themes rotate through a knowable set — neighbourhood relations, a major-power bilateral, a multilateral grouping, and a global-governance or institution question. Preparing four solid IR answer frames is one of the highest-return acts in Mains preparation.

The counterpart finding is on the constitutional side. Parliament and legislature has been quietly rising — 1 question in 2013, 5 in 2022, 4 in 2023 — while executive and civil services has almost vanished at 0.6 a year.

Detail guides: Polity PYQs for Mains, Governance PYQs for Mains.

GS-3: Internal Security Is Bigger Than the Economy

This is the table that most contradicts how GS-3 is actually taught. Internal security is the largest theme at 16.6%, and agriculture is second at 15.1% — while public finance and banking, which absorbs enormous preparation time because it is conceptually hard, is the smallest at 6.0%.

Internal security is also the most under-resourced part of most aspirants’ preparation, because it has no canonical textbook and sits at the end of the syllabus where revision schedules run out of road. Three and a half questions a year, every year, is a large amount of marks to leave to chance.

Agriculture at 3.1 questions a year deserves the same note. It is a low-glamour topic that repays systematic preparation — cropping patterns, MSP and procurement, irrigation, food processing, and the farm-credit chain come round repeatedly.

Detail guide: Economy PYQs for Mains.

GS-4: Half the Paper Is Case Studies

Of the theory half, probity in governance is dominant at 19.9% — nearly twice everything else combined. Thinkers and philosophers, which many aspirants spend months memorising, is 7.8%, or one question a year.

The practical implication is uncomfortable but clear: GS-4 marks are won by writing case studies well, and case studies are a skill, not a body of knowledge. They reward a repeatable structure — stakeholders, ethical issues at stake, options with consequences, a reasoned choice — practised until it is automatic. Reading more ethics theory does not improve case-study answers.

The most recent GS-4 questions, straight from the bank — open any one to see the full case and a model answer:

What This Means for Answer Writing

Three things follow from the tables that are worth more than the tables themselves.

Prepare frames, not facts. In a paper where IR is reliably four questions and internal security three and a half, the winning preparation is a set of reusable answer structures for the recurring themes, stocked with examples and data you can drop in. Our UPSC Mains Answer Writing Strategy guide covers how to build them.

Weight your practice to the paper, not to your comfort. Most aspirants over-practise what they enjoy. If your answer-writing log is mostly polity and modern history, you are practising about a quarter of GS-1 and GS-2 combined.

Practise GS-4 case studies as a separate discipline. Forty-seven per cent of a paper is not a topic. It is a format, and it needs its own weekly slot. See Daily Answer Writing Practice for how to build one.

Every question counted on this page is a live post you can open, read and answer. Browse the whole bank at Mains Practice Questions, or work through it one question a day with Daily Answer Writing. For Prelims, the equivalent question bank is at Practice.

How These Numbers Were Produced

The 1,066 questions come from our Mains question bank, which holds every GS and essay question from 2013 to 2025 with year, paper, question number, marks and word limit.

Theme classification is rule-based: each question is scored against a keyword lexicon for every syllabus clause in its paper, and assigned to the highest-scoring clause. Questions matching nothing are labelled cross-cutting. We have deliberately not hidden that residual — 4.8% in GS-1, 6.0% in GS-2, 10.2% in GS-3 and 12.0% in GS-4 — because it reflects something real about the papers. GS-3 and GS-4 questions genuinely resist single-clause classification more than GS-1 and GS-2 do.

Treat the shares as accurate to within a percentage point or two, not to the decimal. The rank order is robust; the exact figures depend on where you draw the boundaries between clauses.

Frequently Asked Questions

Which topic has the highest weightage in UPSC Mains GS-1? Indian society, at 19.3% of questions between 2013 and 2025. Geography in its combined forms — Indian, physical, and economic — is larger still at 31.7%, but it spans three separate syllabus clauses.

How many international relations questions come in GS-2? Four a year, with unusual consistency. Across 2014 to 2025 the count has been 3, 4 or 5 every single year. IR is 20.8% of GS-2, the largest single theme in that paper.

Is internal security important for UPSC Mains? More than most aspirants assume. It is the largest theme in GS-3 at 16.6%, averaging 3.4 questions a year — ahead of both the economy and the environment.

How many case studies come in the UPSC ethics paper? 78 of 166 GS-4 questions between 2013 and 2025 were case studies, which is 47% of the paper. They also carry the heavier marks: 132 of the paper’s questions are 20-markers.

How many years of Mains PYQs should I solve? All thirteen for the weightage picture, but write answers to the last five to seven. Older questions are useful for pattern recognition; recent ones are closer to the current examiner’s framing.

Do UPSC Mains questions repeat? Themes repeat heavily, wording almost never. The same clause is revisited from a new angle — which is exactly why preparing frames beats memorising model answers.