UPSC IFoS (Indian Forest Service) Exam Pattern 2026

The full UPSC IFoS (Indian Forest Service) exam pattern for 2026 — 4 stages, with the sections, question count, marks, duration and negative marking for each, as set by Union Public Service Commission (UPSC). Then take a free UPSC IFoS (Indian Forest Service) mock in the real pattern below.

Prelims Paper I — General Studies (shared with CSE Prelims)

Mode: Offline OMR, single day, conducted jointly with Civil Services Examination
Sections: Indian History & Culture · Indian & World Geography · Indian Polity & Governance · Economics & Social Development · Environment & Ecology, Biodiversity, Climate Change · General Science · Current Events of National & International importance
Questions: 100 objective MCQs
Marks: 200 (2 marks per question)
Duration: 2 hours (120 minutes)
Negative marking: 1/3 mark (i.e., 0.66 marks) deducted per wrong answer; no penalty for un-attempted questions

This is the SAME PAPER as CSE Prelims Paper I — there is no separate IFoS Paper I. Marks of Paper I determine the cut-off for being shortlisted for the IFoS Mains. Environment & Ecology and Geography together typically contribute 25-35 questions in a year — disproportionately important for IFoS strategy.

Prelims Paper II — CSAT (qualifying, shared with CSE Prelims)

Mode: Offline OMR, same day as Paper I, afternoon shift
Sections: Comprehension · Interpersonal Skills incl. Communication · Logical Reasoning & Analytical Ability · Decision Making & Problem Solving · General Mental Ability · Basic Numeracy (Class X level) · Data Interpretation (Class X level)
Questions: 80 objective MCQs (Decision Making questions carry no negative marking)
Marks: 200 (2.5 marks per question)
Duration: 2 hours (120 minutes)
Negative marking: 1/3 mark deducted per wrong answer except in Decision Making questions

Qualifying in nature only — candidates must score 33% (66/200) to be considered for Mains. CSAT marks do NOT count in the Prelims merit; only Paper I marks decide the Mains cut-off. CSAT is identical to CSE — same paper, same shift.

IFoS Mains (separate from CSE Mains, written descriptive)

Mode: Offline pen-and-paper, conducted by UPSC over roughly 10-12 days, usually in November-December
Sections: Paper I: General English (qualifying-style essay, precis, comprehension) · Paper II: General Knowledge (general studies including current affairs, Indian polity, history, geography, economics, environment, science) · Papers III-VI: TWO optional subjects, two papers each (200 marks per paper) — chosen from Agriculture, Agricultural Engineering, Animal Husbandry & Veterinary Science, Botany, Chemistry, Chemical Engineering, Civil Engineering, Forestry, Geology, Mathematics, Mechanical Engineering, Physics, Statistics, Zoology
Questions: Descriptive written papers — short notes, structured answers, problems
Marks: 1400 total: General English (300) + General Knowledge (300) + Optional 1 Paper A (200) + Optional 1 Paper B (200) + Optional 2 Paper A (200) + Optional 2 Paper B (200)
Duration: 3 hours per paper
Negative marking: Not applicable (descriptive)

Mentioned here for completeness — Kamiyab's IFoS practice is focused on the joint Prelims stage. The IFoS Mains is held SEPARATELY from CSE Mains, normally a few weeks after CSE Mains finishes. Forestry as an optional is the highest-coached choice among IFoS Mains aspirants.

Personality Test (Interview)

Mode: In-person at UPSC, Dholpur House, New Delhi
Sections: Wide-ranging board interview — academic background, optional subjects, current affairs, environmental policy, wildlife and conservation issues, hobbies, situation-based questions tied to forest field administration
Questions: Not applicable
Marks: 300
Duration: Approximately 30-45 minutes per candidate
Negative marking: Not applicable

Final merit = IFoS Mains (1400) + Personality Test (300) = 1700 marks. Prelims marks do NOT carry forward into the final merit — they are only a screening filter.

You know the pattern — now practise in it.

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