Indian Statistical Service (ISS) 2026 – Exam Pattern & Marking Scheme

ISS 2026

Union Public Service CommissionPost Graduate hard

The ISS 2026 written examination is an offline, pen-and-paper, descriptive test held over two days. Below is the detailed exam pattern.

Written Examination Pattern

PaperSubjectTypeMax MarksDuration
Paper IGeneral EnglishDescriptive1003 Hours
Paper IIGeneral StudiesObjective + Descriptive1002 Hours
Paper IIIStatistics IDescriptive2003 Hours
Paper IVStatistics IIDescriptive2003 Hours
Paper VStatistics IIIDescriptive2003 Hours
Paper VIStatistics IVDescriptive2003 Hours
Written Total100017 Hours

Viva-Voce (Personality Test)

ComponentMarks
Viva-Voce200

Final Merit: 1000 Marks

Like IES, Papers I and II (General English and GS) are qualifying only. The final merit is based on Papers III–VI (800 marks) + Viva-Voce (200 marks) = 1000 marks.

Difficulty Level

  • Paper III (Probability): Hard – requires proof-based mathematical understanding at M.Sc. Statistics level.
  • Paper IV (Statistical Methods): Hard – multivariate and non-parametric methods demand applied statistical judgement.
  • Paper V (Sampling & Econometrics): Hard – sampling design and experimental design questions are highly numerical.
  • Paper VI (Applied Statistics): Medium-Hard – Official Statistics and Index Numbers require both theoretical and current awareness.

Frequently Asked Questions

Q.Is ISS 2026 objective or descriptive?

The pattern can include objective, descriptive, or a combination depending on the paper. Refer to the latest official notification for the exact format for each paper.

Q.How is final merit calculated in ISS 2026?

Final merit is prepared using the marks from the merit-counted stages mentioned in the notification. Qualifying papers are usually required to clear but may not add to final ranking.

Q.Is there negative marking in ISS 2026?

Negative marking rules vary by paper and year. Check the official exam pattern section carefully to avoid avoidable score loss.

Q.How should I prepare according to the ISS 2026 pattern?

Simulate real exam conditions with timed mocks and section-wise practice. Pattern-based preparation improves speed, accuracy, and confidence.

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