UPSC Prelims 2027 Plan: 1 November to 23 May — How to Cover Every Subject, Test and Revise

The Calendar and the Paper

🎯 The target: UPSC Civil Services Prelims on Sunday 23 May 2027. This note is the whole plan from 1 November 2026: what to study each day, which test to take when, and how the app keeps track for you. The same plan runs in the app on the Plan tab, where you tick things off.

The calendar and the paper

What	When or how
Notification	13 January 2027; applications close 2 February 2027
Prelims	Sunday 23 May 2027, both papers on the same day
Mains	From 20 August 2027, five days
GS Paper I	100 questions, 200 marks, two hours; this paper alone decides the cut-off
CSAT (Paper II)	80 questions, 200 marks, two hours; qualifying at 33 per cent
Negative marking	A wrong answer costs one-third of the marks for that question; a blank costs nothing

The dates come from the UPSC Annual Calendar 2027 (released on 20 May 2026), which UPSC says may change if circumstances require; recheck when the notification is out. This plan is for GS Paper I. CSAT is only qualifying, but do not ignore it: give it two hours a week from January if maths and reasoning are not your strength.

Three Phases, One Target Each

The plan has three phases. Each ends with a clear target, so you always know whether you are on track.

Three phases, one target each

Phase	Dates (from a 1 November start)	What you do	Done when
1 · First reading	1 November 2026 – 28 February 2027	Every chapter of Polity, Economy, Geography, Modern History, Environment, Ancient-Medieval-Art-Culture, Science and Technology and International Relations, two subjects in parallel	Every chapter read once and its practice questions tried
2 · Second pass	1 March – 11 April 2027	Subject blocks: Polity, then Economy, then Geography with Environment, then History with Art and Culture, then Science with IR; each block ends with a subject test	Every chapter revised; one subject test per block
3 · Revision and mocks	12 April – 22 May 2027	Recall mode on every chapter (two subjects a day), the mistakes drill, a full-length mock every weekend	Third pass done; five weekend mocks in the last five weeks

Why finish the first reading by February: the Economic Survey and the Union Budget arrive at the start of February, and March onwards should go to revision and tests, not to first contact with a topic.
Starting late? The app compresses phases 1 and 2 to fit your start date and keeps the last six weeks for revision. Starting after 12 April gives a crash plan: one quick reading plus recall.
Two tracks in parallel: a heavy static subject (Polity, Economy, Geography, Modern History) runs alongside a lighter one (Environment, Art and Culture, Science, IR), so no subject goes cold for three months.

The Week

Every week has the same shape. Learn it once and the plan runs itself.

The week

Day	Study	Test
Monday – Saturday	Two or three chapters (about two to three hours of reading for a full-time aspirant)	Daily test: 15 questions, 18 minutes
Sunday	No new chapters: revise the week in recall mode and read one current-affairs monthly note	Weekly UPSC paper: 50 questions, one hour, same paper for everyone, ranked
Mock weekend (Saturday and Sunday)	Half a day of reading on Saturday	Full-length mock: 100 questions, two hours, UPSC marking, ranked

The daily test is built for you: about ten questions from the chapters your plan scheduled today and in the last three days, and about five from chapters you read earlier (spaced revision), topped up from every subject. It is marked but not ranked, so use it honestly as a check, not a contest.

If you work or study full-time elsewhere, start earlier or let the plan run past a missed day: the Move unfinished work forward button spreads what you missed over the days left without touching what you have done.

The Tests and What Each Is For

Tests are where Prelims is won. The plan has four kinds, and each one has a job.

The tests and what each is for

Daily test (15 questions): retention. Did today's reading stick, and do last month's chapters still stick?
Weekly UPSC paper (50 questions, every week): breadth. It follows the same subject mix as the real paper, so a weak subject shows up within a week.
Subject tests (end of each phase-2 block): depth in one subject, from that subject's playlist test.
Full-length mocks (100 questions, two hours): exam temperament: time, negative marking and when to stop guessing. They open from Saturday 00:00 to Sunday 23:59 IST on these weekends: 7 Nov, 21 Nov, 5 Dec, 19 Dec, 2 Jan, 16 Jan, 30 Jan, 13 Feb, 27 Feb, 13 Mar, 27 Mar, 10 Apr, 17 Apr, 24 Apr, 1 May, 8 May and 15 May (17 in all). That is every second weekend until 10 April and every weekend after that; the weekend before Prelims is left for rest.

What a mock looks like

Subject	Questions out of 100	Why
Polity and Governance	16	About 17.5 a year in 2015-2024 (range 11-27)
Economy and Agriculture	16	About 19.5 a year in 2015-2024, lower since 2021
Environment and Ecology	16	About 18.4 a year in 2015-2024
Geography (India, world, maps)	12	Steady share, with map and place-in-news questions
Ancient, Medieval, Art and Culture	10	Art and culture, heritage listings and texts
Science and Technology	10	About 10.7 a year in 2015-2024
Modern History	7	About 6.5 a year and falling (2 in 2024)
Current Affairs (monthly notes)	7	More than 40 questions in 2026 were built on recent events across subjects
International Relations	6	About 7 a year where tagged

The shares come from our subject tagging of the official GS Paper I questions from 2015 to 2024; tagging differs between sources, so treat them as a guide, not a forecast.

After every mock

Sort every question into three: knew it, eliminated to it, no idea. Wrong answers in the second group cost the most marks: learn when your elimination fails.
Open the answer sheet and read the chapter link under each wrong question; the app adds the chapter to Weak chapters automatically.
Run the mistakes drill before the next weekly paper, and compare your marks and rank with the last mock.

What UPSC Asks, Subject by Subject

Each subject has its own question style. Read for that style, not just for the content.

What UPSC asks, subject by subject

Subject	What UPSC asks	Keep up to date with
Polity	Articles, amendments, bodies (constitutional or statutory, who appoints, who removes), landmark judgments, 'Consider the following statements'	The SIR verdict, assent to Bills, the Presidential Reference, the 131st Amendment Bill's defeat, new laws
Economy	Concepts (repo, inflation, GDP base years), institutions and reports, schemes with their ministry and numbers	New GDP (2022-23) and CPI (2024) series, RBI policy (next meeting 2-4 December 2026), the Economic Survey and Budget in February
Environment	Species and their status, protected areas and Ramsar sites, conventions and their bodies, pollution and climate science	New Ramsar sites, COP outcomes, new national parks and reserves
Geography	Physical geography, Indian rivers and resources, places in the news on a map	Places tied to the month's news: straits, ports, volcanoes, lakes
History, Art and Culture	Movements and people (with exact names), art forms, monuments, texts and UNESCO listings	World Heritage additions (Sarnath became India's 45th in July 2026), anniversaries
Science and Technology	Space missions, biotechnology, health, defence systems and emerging technology	ISRO launches and tests, DRDO tests, new missions
International Relations	Groupings and their members, summits and where they were held, India's agreements	BRICS, SCO, G20 and Quad meetings, trade agreements
Current Affairs	Named things from the last 12 to 18 months, asked with a static fact	One monthly note each month, from October 2025

Statement questions are the default. Most questions give two or three statements and ask which are correct, or how many. Practise saying exactly what makes a statement false: a wrong number, body, year or place.
Static plus current. A news item is asked with a static fact: the Ramsar site with its State, the mission with its launch vehicle, the judgment with its Article. Every monthly note gives you the static link.

How the Content Stays Current

The library keeps changing until the exam, and the plan changes with it.

How the content stays current

Every month: a current-affairs note at the month end, dated so you know which period each fact is from. Your Sunday task always opens the next note you have not read.
February 2027: notes on the Economic Survey and the Union Budget, which is usually presented on 1 February.
Through the year: RBI policy decisions, new reports and indices, new Ramsar sites and heritage listings are added to the subject playlists as they come.
New chapters reach your plan: when chapters are added after your plan was built, the Plan tab tells you, and Move unfinished work forward fits them into the days left.

Using the Plan in the App

Here is the plan in the app, step by step.

Using the plan

Open Plan (in the Tests bar), pick your start date and create the plan. You get every day up to 22 May.
Each day shows its chapters (Read, Revise or Recall) and its tests. Tick a chapter when you finish it; practising an article from its page ticks it for you.
Tests tick themselves: the daily test, the weekly paper, the mock and the subject tests are recognised as soon as you submit them.
Fell behind? The Plan tab shows how many chapters and tests you missed. One tap moves them forward; past days stay as your record.
Use Results for weak chapters and the mistakes drill, and Learn for recall mode on the key numbers.

Two rules make the plan work: take the test even when you are not ready (that is how you find what to fix), and never skip the Sunday revision (it is what makes the first reading stick).