How the UPSC examination works

The Union Public Service Commission, or UPSC, conducts the Civil Services Examination. Preparation involves three parts of the selection process: Prelims, Mains and the interview. Each asks you to use your knowledge in a different way.

Prelims is the first stage and has two multiple-choice papers:

1. General Studies Paper I (GS I): This paper covers history, geography, Indian polity and governance, economic and social development, environment, general science and current affairs. You need to reach the cut-off set by UPSC to qualify.
2. General Studies Paper II (CSAT): This is commonly called the Civil Services Aptitude Test. It tests reading comprehension, reasoning, problem solving, basic mathematics and the ability to read data. You need at least 33% in this paper to qualify.

A high score in GS I cannot make up for failing CSAT. Even if you score above the GS I cut-off, you cannot clear Prelims unless you also qualify in CSAT.

We will cover GS I preparation in detail in the following sections. Before that, let us look at CSAT, because it needs some attention early in your preparation. You can start with GS, then add a little CSAT practice after a week or two.

Many candidates have found recent CSAT papers difficult. The syllabus describes basic mathematics and data interpretation as Class 10 level. Even so, applying those concepts to unfamiliar questions within the time limit can be demanding. Start preparing for CSAT early. Do not leave it until the last few weeks because it is “only a qualifying paper.”

Those who clear Prelims can write Mains. Mains includes written answers, essays and an optional subject chosen from UPSC's list. Candidates who qualify the written stage are called for the interview, also known as the personality test.

The syllabus shows what you need to study, while previous question papers show how UPSC asks about those subjects. At the beginning, looking through a paper is enough to become familiar with it. You are not expected to answer everything before you have studied.

UPSC releases an official notification every year, explaining the examination rules and any changes for that year. Read it each year you plan to take the exam, and check for any updates issued by UPSC. You can read the 2026 official notification here.

Check the eligibility rules and required documents yourself too, rather than rely only on what someone has told you. If you plan to claim a category-based benefit, read the relevant rules and check the certificates you need. Clear up doubts before applying. Then keep your preparation strong regardless of the category you apply under.

Why the NCERT foundation matters

Before you join coaching, there is some homework to do. Read the basic school textbooks first. I recommend the textbooks from the National Council of Educational Research and Training, usually called NCERTs. Do this basic reading even if you plan to study on your own.

Let me tell you what I did. I studied engineering at an ordinary college and was not a top student. When I decided to prepare for UPSC, there were two or three months before my coaching classes would begin. I used that time to read the NCERTs.

I read them carefully, trying to understand what each topic was explaining. As I read, I took time to connect it with things I already knew or had seen around me. That was the work I did before going to class.

When the coaching classes began, many of the basic concepts were already familiar to me from the NCERT reading. I could follow the teacher's explanation and connect the new information to what I knew. The reading I had done before coaching helped me learn from the classes.

A friend had also joined coaching. Neither of us knew about the other's plans until we met there. He was a bright student, yet he found it difficult to follow the classes.

He had gone straight into class without doing the basic reading first. Many of the concepts were new to him, so he had to understand the basics while trying to follow what the teacher was explaining. It was too much to absorb at once.

For the first two or three days, you may feel you can manage. But new topics come each day, while you still have to understand what was taught earlier. By the end of a week, that unfinished work can pile up. Even someone who has read the basics can fall behind, but catching up is harder when the foundation itself is missing.

The NCERT reading therefore comes before coaching. The work does not end when you join a class, because you still need to study the day's topics, clear doubts and revise. A teacher can explain a topic, but you need time to understand and use it yourself.

Students often ask which standard they should start with and how many subjects to read at once. Use this order:

When you have finished geography for those three standards, you can see that a clear part of the work is complete. That gives you confidence to continue. Starting several subjects and leaving them unfinished makes it harder to see that progress.

I found history difficult at first, so I left it until I had finished the other subjects. When I returned to it, there was still time to study it. You need not begin with the subject you fear most. But if you leave it for later, make time to come back to it.

Finishing the other subjects can help psychologically too. You have already completed a large part of the work, and that progress can give you the confidence to tackle the tougher subject.

How to read an NCERT chapter

For example, you may be reading about clouds. Look at the different shapes shown in the book and think about the clouds you have seen in the sky. As you read about moisture, cooling and rain, try to understand how these concepts explain what you have seen. This takes more time than reading the names alone, but that thinking is part of the study.

Later in this guide, we will try a question about clouds to see how this understanding helps you answer.

When you begin reading NCERTs, you may feel that you should make notes of everything. You may have watched topper videos or heard others recommend making notes. So you start underlining, highlighting and writing things down, until a small chapter becomes a much bigger task.

Suppose a chapter takes two hours to read and understand. You then spend another four hours copying notes, underlining in different colours and arranging the pages. One chapter has now taken six hours. If you do this for every chapter, even a small schoolbook can take many days to finish.

At first, all this work can feel like progress. But then you look at the books still left and realise how little you have finished. Much of your early energy has gone into notes for a few chapters, and the remaining work starts to feel too large. This is how you can get stuck at the NCERT stage.

Do not make detailed notes during the first NCERT reading. You may never return to most of them once you move to more detailed books. Your first task is to understand the basic concepts well enough to move on to those books. If a short note helps clear a recurring confusion, keep it brief.

Avoiding detailed notes does not mean reading six pages in ten minutes and moving on. Stop where you do not understand, think through the concepts and then continue. Later, you will have larger books, current affairs and practice papers to manage. It is harder to rebuild every basic concept while doing all that work. Give the first reading proper attention.

The official NCERT e-book portal provides the textbooks. You can return to a particular explanation later when you need it, and a careful first reading makes that return easier.

How to choose books you can study and revise

After NCERTs, you will need more detailed material for the syllabus. This is often when the search for a perfect book begins. You see an old UPSC question about a detail of Buddhism or Jainism, but cannot find that detail in your book. You wonder whether the book is good enough and start looking for another one.

You do not have to throw the book away just because it did not contain that one answer. No single book can cover every fact UPSC might ask. A very unusual question can leave even well-prepared candidates guessing, and a correct answer may simply come from luck. So do not worry about your book missing one such question or let it make you doubt your whole preparation.

The earlier NCERT work helps here too. When a basic concept is familiar, you can connect new information to it. You are adding to something you understand. That is another reason to do the schoolbook reading carefully.

Read a sample chapter before choosing a book. Even a widely recommended book may assume knowledge you do not yet have. If you cannot follow it, use a simpler source to understand the basics before returning to the larger book.

The UPSC booklist offers choices. The value comes from studying and revising suitable material, rather than buying everything on the list.

How practice helps you answer Prelims questions

After reading a topic, try a few questions on it. Let us return to the cloud example from the NCERT chapter and check that understanding with a question.

In many Prelims questions, the first task is to decide whether each statement is correct. The answer options then ask you to choose a statement, a combination or a count. The statement may look correct because it uses all the familiar words you know. Yet it can be wrong. So read the whole statement carefully before choosing your answer.

The question below is an original example in a Prelims-style format. It is not taken from an actual UPSC paper.

This is why checking an answer means more than looking at your score. You need to find out what went wrong and work on it. Read the explanation even when a guess turns out to be correct. The same concept may appear in a different question next time.

You can use this method whether you study from a book, attend a class or watch a video.

You can still practise previous UPSC questions to understand how a topic is tested. But an older paper contains current-affairs questions from that time. Use those questions for learning, and use mock tests for full-paper practice for your upcoming exam.

Wrong answers cost marks. For each wrong answer, UPSC deducts one-third of the marks assigned to that question. So full-paper practice should also help you decide which questions to attempt and which to leave.

The cloud example was about GS I. CSAT needs separate practice because it tests reading, reasoning and mathematics. As suggested earlier, begin with four or five questions without a time limit. Work on the parts you find difficult, then add timed practice and full papers as you improve.

How to study current affairs

Read a newspaper for the first one to two months. After that, stop daily newspaper study and switch to prepared current-affairs material. Continuing to spend hours on newspaper reading and note-making wastes time you need for your main subjects.

Why you should stop daily newspaper study after this stage

Even selected news articles can take a beginner several hours to read. If you have six hours to study and spend three on the newspaper, half your study time is gone. Cutting out news articles, underlining and copying notes uses even more time. That time should go into your subjects, revision and questions.

A story may also change over several days. You end up following each update without knowing which details matter for the exam. Prepared current-affairs material brings the important developments and background together, so you do not have to collect all of this yourself.

You can read selected editorials to practise English. Keep that as language practice; do not let it become hours of daily newspaper study again.

Use questions to find out what you need to learn

Do not wait until you have read every article before attempting the quiz. Try the question, read the explanation and then study whatever you could not understand. Even if your guess was correct, read the explanation. Seeing your score is not enough.

When you need more background, read to understand the issue. If two countries sign an agreement, find out what problem they are trying to solve and what they have agreed to do. Then learn the relevant names and facts. The explanation gives you a reason to remember them.

If English makes this difficult, read the explanation in a language you know well. Once you understand it, return to the English version and connect the terms with the concepts you now know.

Give current affairs regular attention, including the quiz and explanations. Plan the time around your available study hours, and keep enough time for your main subjects and revision.

Put Prelims first

Do not begin your preparation with Mains answer writing. Focus first on clearing Prelims. Only those who clear Prelims can write Mains. If you spend your early months on Mains answers but cannot clear Prelims, you will not get the chance to write Mains at all.

At the beginning, you have not yet studied the General Studies subjects. You do not know enough of the facts, concepts or examples needed to write an answer. So if someone gives you a Mains question and you cannot write anything, that is expected. It does not mean you are incapable of clearing UPSC. You need to learn the subject first.

This is also how a beginner can get discouraged and think, “UPSC is too difficult. I need to join a course.” Do not judge your ability by an answer-writing exercise before you have studied the topic. Do not rush to buy a course or test series because of that experience.

Choose an optional you can prepare well

Mains includes an optional subject that you choose and study in detail. Do not choose mathematics, physics or engineering just because it was your degree subject. A technical optional can demand much more detailed study than you expect. I recommend choosing a subject you find easier to understand and prepare well.

Do not choose an optional in isolation. Combine what you learn about recent performance with your interest in the subject and how well you can prepare it. Your degree or someone else's marks alone should not decide the choice.

Build essay knowledge through General Studies

Do not begin by collecting separate material for every possible essay topic. Study General Studies well. The subjects and public issues you learn give you the knowledge and examples you will use in essays.

Once you have that knowledge, practise putting your points in order and explaining them clearly. In my approach, the focused work on essay structure comes later, around the last month before Mains. The General Studies learning behind it has been built over the earlier months.

Why I recommend preparing from home

About ten years ago, many students depended on coaching to know what to study and to get access to lessons and guidance. Today, you can find books, explanations, subject-wise classes and practice online. You do not have to move to a coaching city to get them. My recommendation is to prepare from where you live and choose online help for the subjects where you need it. Let me explain why.

Preparing while keeping a career open

Your study plan also has to fit your working life. You may be deciding whether to take a job after graduation, or whether to leave a job you already have. This decision affects what you will do if the exam does not work out.

If you have a good job or a good offer, I generally recommend keeping or accepting it and preparing alongside work. A private-sector job can give you income and experience while you build a career. If you turn down that opportunity and spend several years only on UPSC, finding a similar job later may be difficult.

Hard work matters, but it cannot remove all uncertainty. The questions you face and how you perform on the day also affect the result. Keeping another career open gives you something to continue with if you do not clear the exam.

Around three focused hours a day, on five or six days a week, can make a real difference to your preparation. What you can finish in that time will depend on what you already know and how much work you still need to do. Your job and other responsibilities will also affect the routine. The working-professionals guide explains how to use those hours and check your progress.

If you already have a job, consider leaving it only when you are performing very well in practice and mock tests and believe some extra study time could help you improve further. You should also be financially stable without the job. The working-professionals guide explains this decision.

Full-time preparation can also be an option if a suitable job is not available and you can support yourself while studying. Someone with strong financial support may choose to accept the career risk. This depends on your circumstances, not on completing every topic by a fixed date.

Be realistic about what civil service will give you. It will not solve every problem in life, and the work has its own pressures and responsibilities. Do not choose it as a way to become rich. The attraction and prestige of the services may also change over a long career.

I expect computerisation and greater public awareness to make officials more answerable for their decisions. Over time, this should leave less room for corruption and decisions made without proper reasons. The pace of change will differ across institutions. Choose the services for the work and responsibility you want to take on. You can prepare seriously for that goal while building another career too.

A study routine you can continue

Do not follow a strict timetable

I do not recommend a strict timetable. Keep your study plan flexible. When you are beginning, it is easy to make a timetable that expects more than you can manage. You do not yet know how long each topic will take.

Suppose you plan to finish a topic in two hours, but it takes five or six hours to understand it properly. Every task scheduled after it is now delayed. You keep worrying about the clock and the work left in your timetable. That pressure makes it harder to concentrate on what you are reading.

If this keeps happening, you may lose interest and start thinking that you are not studying effectively. The timetable was supposed to help you. Instead, it makes you feel that you are failing even while you are trying to understand the subject.

If you miss a planned time, that is okay. Adjust the plan and continue. Give the topic the time it needs and cover what remains, even if it takes longer than expected. You do not have to give up on the whole plan because one part took more time.

I believe there is enough time when you use it properly. Spend that time studying and understanding, rather than worrying about a missed schedule. Keep moving forward with a flexible plan.

Use your study time well

Begin with the time you can give to study regularly. Understand the exam structure and start one subject. Read a small topic, think through the concepts and try a few suitable questions. Work on anything you could not understand or answer.

Arrange your study around the time you have, keeping room for reading, revision, current affairs and questions. As preparation progresses, give CSAT, your optional subject and answer writing time within that routine. You do not have to follow a fixed timetable or do every task every day.

Let me tell you how I studied, and where I went wrong. After the early NCERT reading, I attended about five months of coaching. During that period, I usually studied for three to five hours a day. These hours were spread across separate sessions, and I took one day off each week. I did not study for ten hours a day.

I kept the rest of the day fairly quiet. When I was bored, I sometimes watched a familiar television series. I did not fill every break with outings or other activities. That helped me take a break and return to studying. You need rest too, so choose breaks that leave you able to get back to the work.

Then I made a mistake. With about a month left before my first Prelims attempt, I went home. There were family functions and other interruptions, and I attended some of them. I did not keep studying as regularly as I had during coaching.

I took the exam and missed the Prelims cut-off by a very small margin. The earlier months of preparation had brought me close, but I had not used the last month well. I believe I might have cleared Prelims in that first attempt if I had used those final weeks properly.

Take the final month seriously. Keep time for study and revision, and avoid functions or other distractions that take you away from it. That is the lesson I want you to take from my mistake. At that time, I wanted practical advice from someone who had cleared Prelims, but I did not know whom to approach.

The next year was not a full year of steady study either. People around me asked why I was still preparing while my friends were working. I kept considering other plans and did not study regularly. When Prelims approached, I returned to focused study for the last two or three months.

By then, I had already studied the subjects once, so I could revise them instead of starting again from the beginning. In my second year, I cleared both Civil Services Prelims and Indian Forest Service prelims. The basic reading and the work I had done during coaching were still helping me.

In later attempts, I could sometimes prepare for Prelims with about forty-five to fifty days of revision. I revised current affairs and used mock papers to bring back what I had studied. But by then, I had spent years preparing and taking the exam. Those few weeks were enough for me to revise earlier work. A beginner still needs time to do that work first.

Across my attempts, I scored consistently high marks in Prelims and cleared Indian Forest Service prelims multiple times. I also cleared UPSC Mains and appeared for interviews multiple times. What kept helping me was the foundation I had built, followed by revision and questions.

Study regularly through the week

Three hours on six days is a better routine to aim for than leaving everything for two ten-hour sessions on the weekend. When you return to a subject through the week, you can revise what you read, clear doubts and continue from there. Long gaps make it easier to lose track.

Choose study times that fit your responsibilities. Continue from where you stopped, while making room to revise and practise. You do not have to assign a particular subject to a particular day. Keep time for rest too; my day off was a weekday.

Keep testing your understanding

Keep studying regularly and use practice questions to check what you have understood. Read the explanations and return to concepts that are still unclear.

As you cover more of the syllabus, take timed mock tests for the upcoming exam. Use them to check how you manage a complete paper, then review the answers. The practice section explains how to build up to this.