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Olympiad · Science

SOF Science Olympiad

International Science Olympiad (ISO), also listed as NSO. The science Olympiad run by SOF through schools. SOF’s own page calls it ISO; many listings still call it NSO.

Register your school with SOF →Exam calendar

At a glance

Classes
Classes 1 to 12 at SOF-recognised schools. Classes 9 and 10 are included.
Organiser
Science Olympiad Foundation
Registration
Through your school only
Fee
₹170 registration fee
Level 2
Top 5% of each class from Level 1. Dates not announced yet

Key dates

  • Fri, 30 Oct 2026Level 1, date 1Official
  • Thu, 19 Nov 2026Level 1, date 2Official
  • Thu, 3 Dec 2026Level 1, date 3Official
  • To be announcedLevel 2 dates to be announced by SOFOfficial

How to register

  1. Ask your school to register with SOF. Students cannot apply on their own.
  2. The school picks one Level 1 date for the whole school and applies at least 30 days before it.
  3. Sit the Level 1 exam at your school.
  4. The top 5% of each class in Level 1 go on to Level 2 (open to Classes 3 to 12).

What happens next

Level 2 for qualifiers. SOF announces the Level 2 dates separately.

Sources

Last checked 1 Nov 2026. Dates marked Listing come from third-party summaries.