Joint Entrance Examination (Main) • Conducted by National Testing Agency (NTA)
Comprehensive Roadmap to 6 JoSAA Rounds, CSAB Special Rounds, Freeze-Float-Slide Rules & Document Verification
The allocation of undergraduate engineering seats across all 23 IITs, 32 NITs, 26 IIITs, and 38 GFTIs is administered through a centralized, transparent single-window digital mechanism known as the Joint Seat Allocation Authority (JoSAA). Following the declaration of JEE Advanced results in early June, JoSAA commences six sequential rounds of computerized seat allocation. Subsequently, unallocated or surrendered seats in the NIT+ system (NITs, IIITs, and GFTIs) are transferred to the Central Seat Allocation Board (CSAB), which conducts two additional high-stakes CSAB Special Rounds in late July and August.
Navigating JoSAA and CSAB counselling demands meticulous tactical precision. Choice filling is an unalterable, irreversible process: once a candidate locks their preference list before the Round 1 deadline, that exact hierarchical preference order remains frozen for all six rounds. A single careless entry—such as placing an unwanted branch or college above a preferred one—can trap a candidate in an undesirable seat allotment with zero possibility of reordering. Below is the authoritative, step-by-step master guide to JoSAA and CSAB counselling protocols, seat acceptance rules, fee structures, and physical reporting.
Governing Authority
JoSAA & CSAB
Joint Seat Allocation
Counselling Rounds
6 JoSAA + 2 CSAB
Sequential Seat Allotment
Acceptance Fee
₹ 35,000 / ₹ 17,500
Seat Acceptance Fee (SAF)
Seat Options
Freeze, Float, Slide
Dynamic Upgradation Choices
The entire JoSAA admissions cycle is executed through the official cloud portal josaa.nic.in:
Access josaa.nic.in and log in using your JEE Main Application Number and Password. Verify personal profile details: candidate legal name, gender, category, state code of eligibility, and PwD status. There is zero registration fee for participating in JoSAA counselling.
Browse hundreds of available academic programs across IITs, NITs, IIITs, and GFTIs for which you are eligible. Add choices into your active list and order them in strict descending order of true preference. You can reorder, move up, move down, or delete choices freely until final locking.
JoSAA releases two simulated Mock Seat Allotments based on candidate choices submitted by specified dates. Mock allotments indicate tentative seat allocations, enabling candidates to adjust their choice lists before the final deadline.
Before the statutory deadline, lock your choices using an OTP sent to your registered mobile number. If a candidate fails to lock manually, the system automatically locks the last saved choices at the deadline bell.
JoSAA executes seat allocation rounds based on CRL and Category ranks. Upon being allotted a seat in any round, the candidate must complete three mandatory online steps: (a) Accept seat and select Freeze, Float, or Slide; (b) Upload required verification documents; and (c) Pay the Seat Acceptance Fee (SAF).
Virtual Reporting Center (VRC) verifying officers inspect uploaded certificates. If a discrepancy arises, a query is issued on the candidate portal. The candidate must respond and upload the requested document within the stipulated deadline to prevent seat cancellation.
Seasoned counsellors recommend structuring your 200+ choice list according to a disciplined 3-tier distribution:
• Tier 1: Dream / Ambitious Choices (Top 25% of choices): Branches and colleges whose previous year closing ranks were 2,000 to 8,000 ranks above your current rank (e.g., CSE at NIT Trichy or Surathkal). Because Float allows upward movement with zero penalty, filling ambitious choices at the top guarantees you never miss unexpected cutoff relaxations.
• Tier 2: Realistic / Target Choices (Middle 50% of choices): Colleges and branches where your rank matches the historical Round 3-5 closing ranks. This is where your probable seat allocation will occur.
• Tier 3: Absolute Safety / Backup Choices (Bottom 25% of choices): Solid programs whose previous year cutoffs closed 10,000 to 25,000 ranks below your rank (e.g., Core branches in newer NITs or established GFTIs). This protects you from leaving counselling empty-handed.
When a seat is allotted in JoSAA Rounds 1 through 5, the candidate must choose one of three dynamic willingness options:
| Willingness Option | Operational Definition & Meaning | Subsequent Round Behavior & Strategic Use-Case |
|---|---|---|
| FREEZE (Final Acceptance) | Candidate accepts the allotted seat unconditionally and opts OUT of all further seat upgradation in subsequent rounds. | Seat is permanently locked; candidate will NOT be considered for higher choices in next rounds; prepares for final physical reporting. |
| FLOAT (All-College Upgradation) | Candidate accepts the allotted seat, but opts to be considered for any HIGHER preferred choice across ANY participating institution in next rounds. | Most popular strategy; guarantees your current seat while keeping doors open for better colleges or branches in subsequent rounds. |
| SLIDE (Within-College Upgradation) | Candidate accepts the allotted seat, but opts to be considered ONLY for higher preferred branches within the SAME allotted institution. | Used when a candidate is dedicated to a specific prestigious college (e.g., NIT Trichy) and wishes only to upgrade from EEE to ECE or CSE within NIT Trichy. |
Financial transactions during centralized counselling are adjusted against your final college institutional fees:
| Fee Classification | General / Gen-EWS / OBC-NCL Amount | SC / ST / PwD Amount | Operational Purpose & Payment Timeline |
|---|---|---|---|
| JoSAA Registration Fee | ₹ 0 (Free) | ₹ 0 (Free) | Zero registration fee for participating in standard JoSAA rounds |
| Seat Acceptance Fee (SAF) | ₹ 35,000 | ₹ 17,500 | Mandatory upon first seat allotment; adjusted against college admission fee |
| Partial Admission Fee (PAF) | ₹ 40,000 | ₹ 20,000 | Mandatory after Round 6 to confirm NIT+ seat before physical reporting |
| Total Fee Paid Before Physical Reporting | ₹ 75,000 | ₹ 37,500 | Combined SAF + PAF credited directly to the admitting college's account |
| JoSAA Administrative Processing Charge | ₹ 5,000 (Deducted) | ₹ 2,500 (Deducted) | Retained by JoSAA if candidate withdraws seat prior to final round |
Navigating successive rounds of JoSAA requires a methodical strategy to avoid forfeiting high-priority seats:
| Candidate Current Status | Action Chosen in Current Round | Subsequent Round Possibilities | Recommended Tactical Guidance |
|---|---|---|---|
| Allotted 1st Preference Choice | Mandatory FREEZE (Auto) | Candidate cannot upgrade; must pay SAF, upload docs, and await physical reporting | Your ultimate choice is secured; congratulations! Prepare fee receipts and original certificates. |
| Allotted Choice #15 (e.g., ECE at NIT Calicut) | Selected FLOAT | System attempts choices #1 to #14 in next round; Choice #15 is 100% safeguarded | Best balanced approach; if higher choice is allotted in Round 3, Choice #15 is auto-vacated and awarded to someone else. |
| Allotted Choice #25 (e.g., Civil at NIT Trichy) | Selected SLIDE | System evaluates choices #1 to #24 ONLY within NIT Trichy (e.g., Mech, EEE, ECE, CSE) | Use this only if institute brand is strictly more important to you than department specialization. |
| No Seat Allotted in Current Round | No Action Required | System automatically re-evaluates all filled choices in the next round with zero penalty | Remain patient. Cutoffs relax steadily each round as higher-ranked candidates exit to IITs. |
Following the conclusion of Round 6 and payment of PAF, candidates must physically report to the allotted college campus during the notified 5-day window:
• Document Verification Counter: Verification teams match original physical documents against uploaded scans. Ensure your medical certificate, character certificate, and transfer certificate are in the exact prescribed formats.
• Hostel Room Allocation: Most NITs allocate rooms on reporting day based on application registration sequence or branch grouping. Carry at least 8 spare passport photographs and a demand draft or Net Banking access for mess advance fees.
• Orientation & Academic Commencement: Classes typically commence within 48 to 72 hours of physical reporting, accompanied by anti-ragging undertakings and digital ID generation.
If your allotted seat is cancelled due to a document query failure or category certificate invalidation:
• Category Invalidation (e.g., OBC to General): If your OBC-NCL or EWS certificate is rejected due to outdated dates, JoSAA reclassifies you as a General / Unreserved candidate for subsequent rounds. Your seat is cancelled, but your CRL rank remains valid, and you are considered for open seats in the next round.
• Missed Query Deadline: If you fail to respond to a verification query before the round deadline, you are permanently expelled from JoSAA. Your only remaining option to secure an NIT or IIIT seat is to register freshly for CSAB Special Rounds in late July.
A unique procedural challenge arises when a candidate's seat upgrades from an NIT/IIIT to an IIT, or vice-versa:
• NIT to IIT Transition: If a candidate holding a seat in an NIT upgrades to an IIT in a subsequent round, their document verification must be re-conducted by an IIT Virtual Reporting Center. The candidate must log in, inspect their updated allotment letter, and verify that their documents are accepted by the new IIT reporting desk.
• Single Fee Transfer: The Seat Acceptance Fee paid during the initial NIT allotment is automatically transferred across central accounting ledgers to the IIT system; no secondary SAF payment is required.
Following the conclusion of JoSAA Round 6 and institutional reporting, all remaining vacancies across NITs, IIITs, and GFTIs are pooled into the Central Seat Allocation Board (CSAB) Special Rounds:
• Independent Registration: All candidates—including those who participated in JoSAA, those who withdrew, those whose seats were cancelled, and fresh candidates who never registered for JoSAA—can participate in CSAB Special Rounds on csab.nic.in.
• Special Round Fee: Requires payment of an Institute Admission Fee (IAF) of approximately ₹44,000 (adjusted against fees).
• Massive Cutoff Drops: Because students admitted to IITs and top colleges exit the pool, CSAB rounds frequently witness substantial cutoff drops of 10,000 to 40,000 ranks, providing golden opportunities for candidates with mid-tier ranks to capture coveted seats.
Upon concluding online counselling, candidates must report physically to their allotted institution with the following original documents and two sets of self-attested photocopies:
• 1. Provisional Seat Allotment Letter: Downloaded from JoSAA / CSAB portal.
• 2. Admit Card & Final Scorecard of JEE Main: Printed copies.
• 3. Class 10 Certificate & Marksheet: Proof of date of birth and candidate identity.
• 4. Class 12 Qualifying Examination Marksheet & Certificate: Proof of 75% aggregate marks (65% for SC/ST) or top 20 percentile certification.
• 5. Category Certificate (Gen-EWS / OBC-NCL): Issued on or after April 01 in prescribed central government format by an executive magistrate or revenue officer.
• 6. Caste Certificate (SC / ST): Permanent certificate in central format.
• 7. Medical Fitness Certificate: Signed by a registered medical practitioner in prescribed JoSAA Annexure 7 format.
• 8. PwD Certificate: Issued by a certified government medical board or UDID card (if applicable).
• 9. Migration Certificate & School Leaving / Transfer Certificate: From qualifying board.
JoSAA (Joint Seat Allocation Authority) is the centralized single-window portal that conducts seat allocation for all 23 IITs, 32 NITs, 26 IIITs, and 38 GFTIs. Any candidate who secures a valid rank in JEE Main or JEE Advanced is eligible to participate.
No. Online registration, candidate profile verification, and choice filling on josaa.nic.in are 100% free of charge.
Freeze locks your currently allotted seat and exits future rounds. Float accepts the seat while allowing upgrades to higher choices in ANY college in subsequent rounds. Slide accepts the seat but permits upgrades ONLY to higher branches within the SAME college.
The SAF is ₹35,000 for General/OBC/EWS and ₹17,500 for SC/ST/PwD. It must be paid online immediately upon receiving your first seat allotment in any round; failure to pay results in permanent seat cancellation.
No. Once choices are locked (or auto-locked at the closing deadline), the preference sequence is permanently unchangeable across all six rounds of JoSAA.
CSAB Special Rounds are two spot counselling rounds conducted after JoSAA Round 6 to fill leftover vacant seats in NITs, IIITs, and GFTIs. All candidates—including fresh registrants and JoSAA participants—can participate.
The Partial Admission Fee (₹40,000 for General/OBC/EWS and ₹20,000 for SC/ST/PwD) is paid after Round 6 to confirm your provisional admission into the NIT+ system prior to physical reporting at the allotted institute.
Revise chapter-wise mathematical formulas before launching your test: