For Tier-3 IITs like IIT Manipur, IIT Ranchi, and IIT Agartala, securing a seat in CSE (Computer Science) generally requires around 96.5% to 97.5% percentile, which equals a target of 150–165 marks. For branches like ECE, you should aim for about 97 percentile, i.e., roughly 160 marks.

For Tier-2 IITs such as IIT Dharwad, IIT Bhopal, and IIT Tirupati, the expected percentile for top branches like CSE is around 97.5% to 98.5%, translating to 170–180 marks. Even for the lowest branches, you would still need around 97–98 percentile, or around 160–170 marks.

When it comes to Tier-1 IIITs, including IIIT Allahabad, IIIT Pune, and IIIT Guwahati, competition is higher. For CSE, aim for 98.5% to 99.5 percentile, meaning 190–235 marks. For comparatively lower branches, a target of 98–99 percentile (approximately 175–210 marks) is needed.

So start giving your best efforts immediately—each mark you score can elevate you from a Tier-3 IIT level to a Tier-1 IIIT level, dramatically strengthening your future career prospects.