SSC CGL normalisation and cut-offs explained

Every year, soon after SSC publishes the tentative answer key, thousands of candidates work out their raw scores and post them online. Weeks later the scorecards arrive, and many people are surprised. Some find their marks have gone up by a few points; others find them lower. The explanation is normalisation. Once you understand it, you can stop worrying about which shift you drew.

Why normalisation is needed

SSC CGL is held in many shifts over several days or weeks, and each shift gets a different question paper. However carefully the papers are set, some will be a little harder than others. Without an adjustment, a candidate who drew a hard shift would be at a disadvantage through no fault of their own.

Normalisation converts raw marks from different shifts onto a common scale, so that candidates are compared as if they had all taken papers of equal difficulty.

Step 1: know your raw score

Before thinking about normalisation, calculate your raw score correctly from your response sheet and the answer key.

• Tier 1: +2 for a correct answer, −0.50 for a wrong one, nothing for a question left blank.
• Tier 2 Paper I: +3 for a correct answer, −1 for a wrong one, in the sections that carry negative marking.

For example, 70 correct and 14 wrong in Tier 1 gives 140 − 7 = 133. Count question by question; many "normalisation shocks" are really counting mistakes. If you think a key answer is wrong, SSC usually allows objections for a short window, for a fee per question, so the final key may differ from the tentative one.

Step 2: how the equipercentile method works

SSC has normalised multi-shift scores for several years. In 2025 it announced a move to an equipercentile method for its multi-shift examinations. The idea is simple once you strip away the formula.

1. Rank within your shift. Within each shift, every candidate gets a percentile, roughly the share of candidates in that shift who scored at or below them. If 1,800 of 2,000 candidates in a shift scored at or below you, you are at about the 90th percentile.
2. Assume equal ability across shifts. With thousands of candidates per shift, randomly assigned, the spread of ability should be about the same in each.
3. Match equal percentiles. A candidate at the 90th percentile of a hard shift is treated as equal to a candidate at the 90th percentile of an easy shift.
4. Put everyone on one scale. Your normalised score is based on the raw scores that sit at your percentile across all the shifts. Where a shift has no candidate at exactly your percentile, the score is estimated from the nearest points on either side.

A worked example

Suppose an exam had only three shifts, and the raw score sitting at the 90th percentile in each was:

The normalised score for the 90th percentile is the average of the three: (132 + 144 + 150) ÷ 3 = 426 ÷ 3 = 142.

• A candidate in Shift A with raw 132 moves up to 142 (+10).
• A candidate in Shift B with raw 144 moves down to 142 (−2).
• A candidate in Shift C with raw 150 moves down to 142 (−8).

All three did equally well relative to their own shift, so all three end up with the same score. Real exams have many more shifts, but the logic is the same.

What it means for you

You cannot choose your shift, so the lesson is practical: do your best relative to the paper in front of you. A hard paper is hard for everyone in your shift, and panic costs more than difficulty does.

How cut-offs work

A cut-off is simply the score of the last candidate who made it through a stage in a given category. It is an outcome, not a target SSC sets in advance.

Tier 1: the shortlist

Tier 1 is qualifying. Using normalised Tier 1 scores, SSC shortlists candidates for Tier 2 in a ratio to the vacancies, separately for each category (UR, OBC, EWS, SC, ST, and the PwBD and ex-servicemen categories). The notification also sets minimum qualifying marks by category, which act as a floor. The Tier 1 cut-off is the normalised score of the last candidate shortlisted in each category.

Final selection

Final merit is based on Tier 2 (Paper I, plus Paper II or III for the posts that need them), with the qualifying parts such as the Computer Knowledge Test and DEST cleared. Posts are then allocated using:

1. your rank within your category;
2. your post preferences;
3. your eligibility for each post (qualification, age, physical and medical standards);
4. the vacancies in each post and category.

This produces post-wise cut-offs: the score of the last candidate who got a particular post in a particular category. That is why the same year has many different cut-offs, one for each post and category. Our guide to filling post preferences explains the allocation step in detail.

When two candidates have exactly the same score, the notification lays down a tie-breaking order. Read it once so the rule does not surprise you.

Reading past cut-offs

• Cut-offs change every year with paper difficulty, vacancies and the number and strength of candidates.
• Use past cut-offs to set a target range, not a single number.
• Compare only cut-offs from the same pattern. Older cycles with different sections and marks are not comparable.
• Look at post-wise cut-offs for the posts you want, not only the overall figure.

What you can control

• Accuracy, especially in Tier 2, where each wrong answer costs a full mark. Our Tier 2 strategy guide shows how to balance attempts and accuracy.
• Your post preferences, filled carefully and on time.
• Your documents and eligibility, so nothing is in doubt at verification.

Practice set

1. Why does SSC normalise scores?
2. In Tier 1, a candidate has 72 correct and 10 wrong. What is the raw score?
3. At the 80th percentile, three shifts have raw scores of 120, 128 and 139. Using the simple averaging idea above, what is the normalised score, and what happens to the candidate from the first shift?
4. If your shift was easier than average, what is likely to happen to your normalised score?
5. Why are there several cut-offs in the same year?

Answers

1. Different shifts have different papers of slightly different difficulty; normalisation puts everyone on a common scale.
2. 72 × 2 = 144; 10 × 0.50 = 5; raw score 139.
3. (120 + 128 + 139) ÷ 3 = 387 ÷ 3 = 129. The first-shift candidate rises from 120 to 129.
4. It is likely to fall a little below the raw score.
5. Cut-offs are set by category and, at the final stage, by post, so each post and category combination has its own last-selected score.

What to do next

• Download your response sheet and calculate your raw score question by question.
• Check the tentative key and raise objections within the window if you are confident.
• Read the current normalisation notice once.
• Note past post-wise cut-offs for your target posts as a range.
• Get back to Tier 2 preparation instead of waiting for the result.