JoSAA 2026 Round 5 vs CSAB: Key Differences

Because CSAB follows immediately after JoSAA's final round and uses the same JEE Main rank, many candidates assume it's simply an extension of JoSAA — a de facto "Round 6." It isn't. CSAB (Central Seat Allocation Board) is a separate counselling authority with its own registration portal (csab.nic.in), its own choice-filling process, and — most importantly — a narrower scope of participating institutes than JoSAA.

Understanding these structural differences matters directly for strategy: whether you should withdraw an existing JoSAA seat to try CSAB, how much better (or worse) a CSAB outcome is likely to be compared to your Round 5 result, and how much time you realistically have before CSAB's own rounds close. The comparison table below breaks down each dimension precisely.

IITs operate under a distinct administrative framework and do not route their leftover seats through CSAB at all. Any IIT seat left vacant after JoSAA's Round 5 is handled — or left unfilled — entirely at the discretion of the individual IIT, with no centralized CSAB-style reapplication process. This is a firm structural rule, not a policy that varies year to year.

NITs, IIITs, and GFTIs, by contrast, are exactly the institute categories CSAB exists to serve. Their post-Round-5 vacancies are compiled into CSAB's seat matrix in a structured, centralized way, making CSAB a meaningful second opportunity specifically for these three institute types — see our detailed breakdown of NIT vacant seats after Round 5 for how this plays out in practice.