IAT vs NEST
Both are science-focused entrance exams, but their scoring and admission systems are different. Preparing for both can be practical when your target institutions overlap.
IAT
Destination: IISERs and other institutions that use IAT in the relevant admission cycle.
2026 structure: 60 questions, 15 each from Biology, Chemistry, Mathematics and Physics; 180 minutes; +4 for correct and −1 for incorrect.
Open IAT hub →NEST
Destination: five-year Integrated MSc at NISER Bhubaneswar and UM-DAE CEBS Mumbai.
2026 structure: four subject sections; +3 for correct and −1 for incorrect. SMAS and MAP are part of merit qualification.
Open NEST hub →Side-by-side
Scoring
IAT uses a direct total score under the published 2026 structure. NEST uses section thresholds and a best-three qualifying total.
Admission model
IAT counselling considers rank, category, program preferences and available seats. NEST uses SMAS, MAP and the merit/admission process of NISER and CEBS.
Syllabus overlap
Both cover the four core science subjects, so a strong Class XI–XII science foundation can support preparation for both. Exam-specific practice still matters.
Which is easier?
There is no universal answer. Your subject strengths, speed, accuracy and preferred admission destination matter more than a generic difficulty label.
Best next steps
Official-source note
Exam rules change by cycle. The comparison above uses published 2026 structures as a reference; always verify the official brochure for your admission year.