CSAB 2027 ST Cutoff Process Explained

CSAB allocates seats that remain vacant in NITs, IIITs, and GFTIs after JoSAA's main rounds finish. The same central reservation policy that governs JoSAA applies here: ST candidates get 7.5% reservation, cutting across every institute's Home State and Other State seat pools. This structure is a long-standing government policy rather than something redefined each counselling cycle, so it is reasonable to expect it unchanged for CSAB 2027.

Because ST reservation is vertical, ST candidates compete only among themselves for their designated share of seats, not against the General, OBC-NCL, or SC pool. This is why ST cutoff ranks appear numerically far higher than General category cutoffs for the exact same branch and institute — it does not reflect a lower academic bar, only a smaller, separately-ranked competition pool.

ST seats still vacant by the time CSAB begins are typically concentrated at newer NITs, certain IIITs, and GFTIs outside regions with a strong ST applicant base. This means CSAB ST cutoffs at these institutes can open up substantially compared to JoSAA's final closing ranks — often even more than SC cutoffs at the same institute, given the generally smaller ST applicant pool nationally. This is a structural dynamic that is expected to repeat in the 2027 cycle, though exact numbers remain unknown this far in advance.

ST certificates do not require annual renewal since tribe status is not income-dependent. The certificate must be issued by a competent authority in the prescribed central government format, listing the tribe exactly as it appears in the Central List of Scheduled Tribes applicable to the candidate's state of origin. As with SC, ST status is determined by state of origin, not the state of current residence or Class 12 schooling.

ST candidates also benefit from the 65% Class 12 aggregate eligibility threshold (versus 75% for General/OBC-NCL/EWS), a relaxation that has applied consistently through JoSAA and, by extension, CSAB for years.