You don't need a 99.5 on CAT — and the CAT-25 data proves it

Every CAT aspirant I have ever met has a number in their head. For most of them, the number is 99.5. They have decided, somehow, that 99.5 is the threshold below which the CAT was not worth writing. I have spent two decades trying to talk students out of that number.

The 99.5 fixation has nothing to do with what IIMs actually require. It comes from a folk-tradition of CAT prep — a number passed down from senior to junior, from coaching brochure to coaching brochure, that has detached from the data. The actual cutoffs are lower, and the actual mock-day behavior of someone aiming for 99.5 sabotages even the lower cutoffs.

Where the 99.5 number actually came from

In the early 2000s, when there were just six IIMs and the test was different, a 99.5 was a reasonable working target for serious aspirants. The top three IIMs admitted in a narrow band. CAT was scored differently. The applicant pool was smaller. The number stuck in coaching folklore.

Since then, three things changed. CAT moved to percentile-based scoring with sectional cutoffs that students underestimate. The number of IIMs grew from six to twenty-two, with vastly different programmes. And the applicant pool tripled — which means percentiles are computed differently than the older students remember.

What the actual percentile floors look like — CAT-25 cohort data

From the IMS Indore + Bhopal CAT-25 cohort, we have 149 named call-getters across the major IIMs and B-schools. The percentile floor for each tier — the lowest percentile that converted a call — looks like this:

• IIM Ahmedabad / Bangalore / Calcutta (A / B / C): floor at 99.6–99.7 percentile for general category, single attempt, fresh undergrad. Diverse profiles convert lower.
• IIM Lucknow / Indore / Kozhikode: floor at 97.0–98.5 percentile.
• IIM Mumbai / Shillong / Visakhapatnam / Udaipur / Amritsar / Raipur / Rohtak / Trichy / Kashipur: floor at 90–95 percentile. The newer IIMs admit reliably from this band.
• FMS Delhi / MDI Gurgaon / SPJain / IIFT / XLRI: 95–97 percentile, with strong sectional balance.

The number 99.5 doesn’t appear in any of these bands. Even for IIM-A/B/C, the floor is 99.6+ — but the median convert is around 99.8, and there are profile-based adjustments. Setting 99.5 as your goal means you are under-target for IIM-A but massively over-target for IIM-Mumbai or IIM-Shillong.

Why chasing 99.5 backfires — the prep-behavior problem

Here is what happens to a CAT aspirant who fixes 99.5 as the goal: their mock-day behavior becomes brittle. Every mock under 99.5 feels like a failure. Every mock above 95 but below 99 produces despair instead of analysis. The student stops looking at why they scored what they scored and starts treating every mock as a verdict.

After ten weeks of this pattern, two things happen. First, the student starts avoiding mocks (the most common cause of late-prep collapse). Second, when they do write mocks, they overplay risky questions trying to get to 99.5 — they refuse to skip, they attempt questions they should leave, and their accuracy crashes. The cycle compounds.

Compare with the student who aims for 95 with discipline. They take mocks calmly because 95 is reachable. Their accuracy stays high because they skip without flinching. Their score climbs to 97, then 98 organically — because they are running the test correctly, not chasing a number. The 99.5-target student rarely sees 98. The 95-target student often crosses 99.

The target you should actually set

The right number to aim for is your percentile floor for the IIM you would actually attend. If your honest list of acceptable B-schools includes IIM Indore PGP, your floor is 93.5–97. Target 95 in mocks. If your list includes any new IIM, your floor is 90+. Target 92.

Only when your acceptable list is IIM-A/B/C-only — which is itself a problematic goal, but a separate conversation — should you target 99+. And even then, the right framing is “maximise within reasonable risk”, not “hit 99.5 or fail.”

When 99.5+ does actually matter

Two scenarios. First, if your profile has compensating concerns — older student, engineering monoculture, no work experience — you may need a higher percentile to offset. The IIM selection process weighs profile and percentile together. A 99.5 with a weak profile converts roughly the same as a 98 with a strong profile.

Second, if your goal is IIM-A’s FABM, ISB’s YL programme, or one of the niche specialisations with brutal cutoffs. Those need the high 99s. But almost no student writing the CAT for the first time should set those as a starting goal. They’re destination programmes, not entry points.

What this means for your daily prep

Three changes in behavior, immediately:

1. Set your target by IIM, not by number. Pick the lowest-floor IIM you would attend, then target that floor plus 2 percentile points of buffer. That is your mock target.
2. Stop looking at the percentile after every mock. Look at the score, the accuracy, and the time allocation. The percentile is a lagging indicator that you cannot directly control.
3. Build skip-discipline. The students who convert IIMs are the ones who finish a CAT with 22 questions attempted at 90% accuracy, not the ones who attempt 28 at 70%. Practice skipping until it feels automatic.

The 149 students in our CAT-25 cohort did not, on average, score 99.5. They converted IIMs anyway — because they ran the test as if it were a test, not a verdict. The number you have in your head is wrong. Replace it.

Related reading on this site: Named CAT-25 call-getters and their percentiles · Is 7 months of prep enough for CAT? · How IMS Indore compares.