How NDA merit and cut-offs work

"What is the NDA cut-off?" is one of the most searched questions about the exam, and one of the least useful. There is not one cut-off but several hurdles, the numbers change every time, and the figure that decides your selection is not a written score at all but a combined total out of 1,800. Understanding how the hurdles work is far more useful than memorising last year's number, because it tells you where to put your effort.

This guide goes through each stage in order, using the rules in the notification, and then shows how to set a target that protects you from a hard paper.

Hurdle 1: the written qualifying marks

The notification says UPSC will prepare a list of candidates who obtain the minimum qualifying marks in the written examination, as fixed by the Commission at its discretion. It adds that the Commission may fix qualifying marks in any or all subjects.

In practice, this works as two filters:

• A minimum in each paper. You cannot make up for a very weak GAT with a brilliant maths score, or the other way round. Many sources report this minimum as 25% of each paper (75 of 300 in Maths and 150 of 600 in GAT), but the notification does not print a figure.
• An overall written cut-off. Among candidates who clear both minimums, only those above a certain total are called to the SSB. This total depends on the number of vacancies, the difficulty of the papers and how candidates performed.

Written results for men and women are prepared separately, against the vacancies notified for each.

Hurdle 2: the SSB

Candidates who clear the written stage are called to a Services Selection Board. The SSB has two stages: Stage I (intelligence tests and a picture-based discussion) screens candidates, and only those who clear it go on to Stage II (psychology tests, group tasks, the interview and the conference).

To be acceptable, a candidate must secure the minimum qualifying marks separately in the written examination and in the SSB's Officer Potentiality Test, which the SSB fixes at its discretion. Being "recommended" at the SSB is therefore a hurdle in its own right, not just a source of marks.

Two further conditions sit on top:

• Candidates who want the flying branch of the Air Force must also clear the Computerised Pilot Selection System (CPSS), which each candidate can take only once.
• Recommended candidates must pass a medical examination.

The final merit list

Candidates who clear every hurdle are ranked by their written marks plus SSB marks, with separate merit lists for men and women against the vacancies notified for each:

Written (900) + SSB (900) = 1,800.

Worked example: how the SSB changes the order

Consider four hypothetical candidates:

C has the highest written score but finishes last of the four. D has the lowest written score but finishes first. A and B are tied on 750.

How ties are broken

The notification lists the tie-breaking rules in order:

1. The candidate with more marks in the written total ranks higher.
2. If that is also equal, the candidate with more marks in Paper II (GAT) ranks higher.
3. If that is also equal, the candidate older in age ranks higher.
4. Any remaining tie is resolved at the Commission's discretion.

So in the example, A ranks above B: both have 750, but A's written total is 400 against B's 370. The final order is D, A, B, C. Marks are rounded to two decimal places before ties are decided.

Service allocation

Seats in the Army, Navy and Air Force wings of NDA and in the Naval Academy's 10+2 Cadet Entry Scheme are filled up to the number of vacancies, on the basis of merit-cum-preference, subject to eligibility and medical fitness. Three points follow:

• Your order of preferences matters. If you are eligible for several services, you are considered in the order you listed them. Once you are allotted one, you are not considered for the others.
• Eligibility narrows your options. The Navy, Air Force and Naval Academy need Physics, Chemistry and Mathematics in Class 12; the flying branch also needs CPSS; each service has its own medical standards.
• A rank that is good enough for one service may not be good enough for another, depending on vacancies and how many higher-ranked candidates preferred it.

Think about your preferences carefully when you apply, and be ready to explain them honestly at the SSB.

Using past cut-offs sensibly

Past cut-offs are useful as a rough guide, not a promise. They move with the difficulty of the paper, the number of vacancies and the number of candidates. The method that works:

1. Find the written cut-offs for the last three or four exams on the UPSC website.
2. Take the highest of them, not the average.
3. Add a safety margin — enough to absorb a harder-than-usual paper.
4. Split that total into a target for each paper, and check that each target is comfortably above the per-paper minimum.
5. Aim to reach that target in several mocks in a row before the exam, not just once.

Worked example: turning a target into questions

Suppose, purely for the arithmetic, that you set a written target of 400 out of 900. One way to split it is 150 in Maths and 250 in GAT.

• Maths 150: attempting 66 questions with 62 right and 4 wrong gives 155 − 3.33 ≈ 151.7. That is about 62 correct answers out of 120, with very few wrong.
• GAT 250: 32 right and 3 wrong in English gives 128 − 4 = 124. 36 right and 6 wrong in GK gives 144 − 8 = 136. Together that is 260.

Written this way, the target stops being a vague number and becomes a set of questions you can check in every mock: "Did I get about 62 maths questions right with no more than a handful wrong?" Replace 400 with the figure your own research gives you.

What this means for preparation

• Balance both papers. A very high maths score cannot rescue a GAT score below the minimum.
• Aim for a safe written score, not a perfect one. Beyond the cut-off, extra written marks help your final total, but the SSB offers the same number of marks.
• Prepare for the SSB in parallel. It is both a pass-or-fail hurdle and half the final total.
• Take care over preferences and eligibility. They decide which seat your rank can get you.

Quick check

1. Does the notification fix the written minimum at a stated percentage? — No. The Commission fixes it at its discretion, and may fix it for any or all subjects.
2. What is the final merit list out of? — 1,800: written 900 plus SSB 900.
3. Two candidates tie on the final total. What decides the order first? — The higher written total.
4. If the written totals are also equal, what comes next? — The higher GAT (Paper II) score.
5. You are eligible for the Army and Navy and put Navy first. You are allotted the Navy. Will you also be considered for the Army? — No.

For how the written papers are marked, see the NDA exam pattern explained; for the SSB, start with the SSB overview.