In this guide
CDS is held twice a year, so most candidates have about six months between one notification and the next exam. That is enough time to prepare properly, provided the months are used in the right order. The common failure is not laziness. It is spending three months on one subject, discovering in month five that another has been untouched, and then trying to finish everything in a panic.
This plan spreads all three papers across the whole period, builds in previous-year papers from month three, and runs SSB and fitness work alongside so that you are not starting from zero when the written result comes out.
It assumes about four to five hours a day of study, plus exercise. If you are working or in college, stretch it over eight months; the guide on preparing with a job or college shows how.
The logic of the plan
- Arithmetic first, geometry later. Arithmetic methods (percentage, ratio) are used inside later topics, so they come first.
- GK in blocks, one subject at a time, but with a short daily current-affairs slot throughout.
- English every single day. It is a skill, and skills fade without use.
- Full papers from month three, because timing is a skill you can only build by practising it.
- Month six is for revision and papers only. No new topics.
Month by month
| Month | Maths | GK | English |
|---|---|---|---|
| 1 | Number system, HCF and LCM, fractions, simplification | Ancient and medieval history | Grammar basics; daily reading |
| 2 | Percentage, profit and loss, interest, ratio and proportion | Modern history, freedom struggle | Spotting errors, sentence improvement |
| 3 | Averages, mixtures, time and work, speed and distance | Geography: physical, India, world | Vocabulary: synonyms, antonyms, idioms |
| 4 | Algebra, logarithms, trigonometry, heights and distances | Polity and economy | Ordering of sentences, comprehension |
| 5 | Geometry, mensuration, statistics | Science, environment, defence | Cloze, fill in the blanks; full sectionals |
| 6 | Full revision; previous papers | Current affairs; full revision | Full papers |
OTA-only candidates can drop the maths column and split that time between GK (about two-thirds) and English (about one-third).
A daily structure
| Slot | Time | Activity |
|---|---|---|
| Morning | 30 to 45 min | Run and strength work |
| Morning | 1.5 h | Maths: new topic, then 20 to 30 past questions |
| Late morning | 1.5 h | GK: the month's subject |
| Afternoon | 1 h | English: one question type, plus a passage |
| Evening | 20 to 30 min | Newspaper and current-affairs notes |
| Night | 20 min | Revise the day's notes; update your error notebook |
That is about 4.5 to 5 hours of study. The night slot is small but it matters: reviewing the same day turns reading into memory.
A weekly structure
| Day | Extra task |
|---|---|
| Monday to Friday | Daily structure as above |
| Saturday | One previous-year paper (from month 3), then analysis |
| Sunday | Weekly revision of all three subjects; a GK quiz; rest in the evening |
From month three, alternate the Saturday paper: English one week, GK the next, maths the week after. From month five, sit all papers on the same day at least twice a month, as you will on exam day.
Adjusting to your strengths
The table is a default. An engineering graduate may need less maths and more GK; a humanities graduate may need the reverse.
Here is a simple rule. After your first full set of papers in month three, write down your three scores. Shift one extra hour a day towards the weakest paper for the next four weeks, taking it from the other two. Never drop any paper to zero. Then test again and repeat.
For example, suppose a hypothetical candidate scores 62 in English, 38 in GK and 55 in maths. GK is the weak paper, so for the next month GK goes from 1.5 to 2.5 hours a day, English drops from 1 hour to 30 minutes, and maths from 1.5 hours to 1 hour. The total stays at four hours. Four weeks later, the candidate retests and rebalances.
SSB and fitness alongside
The written result usually comes out a few months after the exam, and the SSB follows. Candidates who start SSB preparation only after the result are rushed. Build it in lightly from the start:
- Months 1 to 6: read a newspaper daily and form a view on major issues. Talk about them with friends or family.
- From month 3: read how the SSB works; the SSB overview is a starting point.
- From month 4: practise speaking about yourself for two minutes: your family, education, interests and why you want to join.
- Every day: running and basic strength. Aim to run a few kilometres comfortably and build push-ups, sit-ups and pull-ups steadily.
Checkpoints
| When | You should be able to |
|---|---|
| End of month 1 | Solve number-system and HCF-LCM questions without looking up rules |
| End of month 2 | Solve arithmetic questions accurately in about a minute each |
| End of month 3 | Complete a full English paper within two hours |
| End of month 4 | Score steadily in English sectionals; finish a GK paper in time |
| End of month 5 | Finish a full maths paper in time with good accuracy |
| End of month 6 | Clear recent cut-offs comfortably in previous papers |
If you miss a checkpoint by a week, carry on and catch up in the Sunday slot. If you miss it by a month, cut the lowest-priority topics from the next month rather than pushing everything back.
Common mistakes
- Skipping English on "busy" days. A missed day is fine; a missed week shows in your score.
- Starting full papers too late. Timing needs practice. Month three is the latest sensible start.
- Adding new topics in month six. The last month is for revising and sitting papers.
- No fitness until the SSB call. You cannot build running stamina in three weeks.
What to do this week
- Take one previous-year paper in each subject to set a baseline
- Print or copy the month-by-month table and put it where you study
- Set up an error notebook with a section for each paper
- Start a daily run, even a short one
- Block the Saturday slot for papers from month three onwards
Six months of steady, balanced work beats three months of intense work on one paper. Keep all three subjects moving, test yourself on schedule, and let the scores tell you where to adjust.
A note on dates and numbers. Exam patterns, vacancies and schedules change from year to year. Always confirm the current details in the latest notification on the Union Public Service Commission website .
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