Roadmap
UPSC Mains: the complete preparation roadmap
Nine papers, in the order they matter. Free to read, no account needed.
Last verified 26 August 2026
- 9
- papers across Mains
- 1,750
- written marks, 7 merit papers
- 275
- interview marks
- 2,025
- grand total for the final rank
After the filter
Mains at a glance
Prelims narrows the field. Mains is where the exam actually decides your rank, nine written papers spread across several days, each three hours long.
Qualifying (2 papers, 600 marks)
Paper A, an Indian language, and Paper B, English, 300 marks each. Clear 25 percent in both, or your other papers are not even evaluated.
Merit-counting (7 papers, 1,750 marks)
Essay, GS Papers 1 to 4, and two Optional Subject papers, 250 marks each. These seven decide your rank, together with the interview.
The interview adds 275 marks on top. Written (1,750) plus interview (275) is 2,025, the number your final rank and service allocation come from.The core syllabus
The four GS papers
Each GS paper is 250 marks, 20 questions, 3 hours. The syllabus is wide, but it clusters around six or so themes per paper.
GS Paper 1
Indian Heritage & Culture, History & Geography of the World and Society
- Indian culture: art forms, literature, architecture, ancient to modern
- Modern Indian history and the freedom struggle
- Post-independence consolidation and reorganisation
- World history: industrial revolution, world wars, colonisation, decolonisation
- Indian society: diversity, women, population, poverty, urbanisation, globalisation
- World physical geography, resource distribution, geophysical phenomena
Overlaps our Prelims notes in: History (7), Geography (5), Art & Culture (3)
GS Paper 2
Governance, Constitution, Polity, Social Justice and International Relations
- The Constitution: history, features, amendments, basic structure
- Union-State relations and federal structure
- Parliament, the executive, the judiciary, statutory and quasi-judicial bodies
- Government policies, welfare schemes, the social sector (health, education)
- Governance, transparency, e-governance, the civil services
- India's neighbourhood, bilateral and regional groupings, international institutions
Overlaps our Prelims notes in: Polity (7), Economy (7)
GS Paper 3
Technology, Economic Development, Biodiversity, Environment, Security and Disaster Management
- Indian economy: planning, resources, growth, inclusive development
- Agriculture: cropping, irrigation, subsidies, MSP, the PDS
- Infrastructure, investment models, industrial policy
- Science and technology: space, IT, biotech, robotics, achievements
- Environmental conservation, pollution, environmental impact assessment
- Internal security, border management, cyber security, disaster management
Overlaps our Prelims notes in: Geography (5), Economy (7), Environment (5), Science & Technology (4)
GS Paper 4
Ethics, Integrity and Aptitude
- Ethics in human actions, and in public and private relationships
- Attitude, emotional intelligence, and foundational civil-service values
- Probity in governance, and moral thinkers from India and abroad
- Accountability, transparency, and the Right to Information
- Corruption, laws and institutions against it
- Case studies applying all of the above
Overlaps our Prelims notes in: Polity (7)
GS Paper 4 is the odd one out. Ethics, Integrity and Aptitude has the least overlap with anything a Prelims book covers. It genuinely needs its own preparation track, which is not built here yet, see the honest list further down.250 marks, your own voice
The Essay paper
The one Mains paper with no fixed syllabus. What is tested is how you think and argue in flowing prose, not recall.
Structure
Two sections, four topics each. Write one essay from Section A, one from Section B.
Length
1,000 to 1,200 words per essay is the working range most guidance converges on.
Marks
250 total, split evenly, 125 marks per essay.
Sections
Section A tends toward philosophical or abstract themes; Section B toward governance, economy and current affairs.
Pick one from each section, not two from one. A candidate who writes both essays from Section A (or both from B) has one of them marked zero, a self-inflicted, entirely avoidable loss.A third of your written score
The optional subject
One subject, chosen from a list of 48, examined at a depth closer to a postgraduate paper than anything in GS.
Papers
Two, 250 marks each, 500 marks total, roughly a third of the written score.
Choices
48 subjects on UPSC's list: the familiar humanities and sciences, plus literature in 23 languages.
One subject only
Both papers are the same subject, at a postgraduate level of depth.
Honest gap: Civils Notes does not cover any optional subject today. Choosing one, and preparing it, currently needs a source outside this platform. Named here rather than left implicit.How marks are actually won
Answer-writing basics
The same facts, written two different ways, can score very differently. A few rules hold across every GS paper.
Questions per GS paper
20, worth a mix of 10 and 15 marks each, summing to 250.
10-mark question
About 150 words, roughly 7 to 8 minutes.
15-mark question
About 250 words, roughly 10 to 12 minutes.
Structure
A short introduction, a body with clear subheadings and specifics, a short conclusion. Diagrams and flowcharts where they replace prose, not decorate it.
Running out of time is the most common failure mode, not running out of knowledge. Twenty questions in three hours leaves under nine minutes a question on average, budget for it deliberately rather than discovering the shortfall on exam day.One base, two lenses
How your Prelims notes carry into Mains
The static portions of GS Papers 1 to 3, Polity, History, Geography, Economy, Environment, Science & Technology, are the same underlying facts your Prelims preparation already builds. Civils Notes is starting to layer the Mains-specific analytical angle directly onto the Prelims notes you are already reading, rather than building a second, separate set of Mains notes from scratch.
Where a note has this layer, you will see a For Mains block, the relevant judgment, statute or a real past Mains question, with the reasoning UPSC tends to actually test. A toggle at the top of that article switches between Prelims + Mains (the default) and Prelims only, so an aspirant not yet preparing for Mains can hide it without losing the rest of the note.
Rolling out now, starting with Polity. Not every note has a Mains layer yet. Where it exists, it is grounded in a real, checkable case or question, never a generic "this is Mains-relevant" line.
What Civils Notes does not do, yet
Named plainly, not glossed over, so the honest shape of what this platform covers for Mains stays visible.
Not built: answer-writing practice
No Mains-format question bank, no timed answer-writing sessions, no way to submit and get an answer scored on this platform today.
Not built: AI evaluation
Automated or AI-assisted evaluation of a written answer is a real idea on the longer-term roadmap, not something available, or promised on a date, today.
Not built: optional subjects
None of the 48 optional subjects have notes, questions or a strategy page here yet.
Not built: GS Paper 4, Essay, Interview prep
Ethics and Aptitude, essay craft, and interview preparation have almost no overlap with the Prelims-anchored notes above, and need their own material, planned but not written.
What does exist: this roadmap, the Mains-angle layer landing on Prelims notes subject by subject, and further strategy and syllabus articles planned the same way, real content, verified before it ships, rather than promised in advance.
Frequently asked questions
How many papers are there in UPSC Mains, and how many actually count?
Nine papers in total. Two, Paper A (an Indian language) and Paper B (English), are qualifying only, you need 25 percent in each just to have your other papers evaluated. The seven that count toward your rank are the Essay, GS Papers 1 to 4, and two Optional Subject papers, 250 marks each, 1,750 marks combined.
What is the total marks for UPSC Mains plus the interview?
1,750 written marks plus 275 interview marks, 2,025 in total. That combined score is what produces the final merit list and the service allocation.
Which GS paper covers which subjects?
GS Paper 1 covers Indian heritage, history and geography, plus Indian society. GS Paper 2 covers the Constitution, governance and international relations. GS Paper 3 covers the economy, science and technology, environment and internal security. GS Paper 4 is Ethics, Integrity and Aptitude, largely new material with the least overlap with anything in Prelims.
Can I write both Mains essays from the same section?
You are required to write one from Section A and one from Section B. Writing both from a single section is a real, recurring mistake, and the essay that breaks the rule is marked zero.
What is the word limit for UPSC Mains answers?
There is no rigid UPSC-enforced word count, but the working convention is about 150 words for a 10-mark question and about 250 words for a 15-mark question, with roughly 10 to 15 percent flexibility either way. Writing well past that on a 20-question, 3-hour paper usually means running out of time before the last few questions.
Does Civils Notes have Mains mock tests or AI answer evaluation?
Not yet. Today, Civils Notes covers Mains with study notes carrying a Mains-angle layer on relevant Prelims topics, and roadmap and strategy articles like this one. Answer-writing practice and evaluation are not built, and are named honestly further down this page rather than implied.
How do I choose a UPSC optional subject?
By scoring track record, genuine interest, overlap with the GS papers, and available guidance, in roughly that order. Civils Notes does not yet cover any optional subject in depth; this is flagged honestly as a gap, not glossed over.
Start with the notes that already carry a Mains layer.
Curious how the notes and questions are checked before they go live? Read about our methodology.