Indian Forest Service Exam 2025 : IFS Eligibility, Pattern & Syllabus

Indian Forest Service Exam 2025 : IFS Eligibility, Pattern & Syllabus

Indian Forest Service Exam 2025 : IFS Eligibility, Pattern & Syllabus

Indian Forest Service Exam 2025 : IFS Eligibility, Pattern & Syllabus

Gajendra Singh Godara
Sep 22, 2025
14
mins read
Indian Forest Service Exam 2025 (IFoS) details for eligibility, syllabus, pattern, and preparation tips
Indian Forest Service Exam 2025 (IFoS) details for eligibility, syllabus, pattern, and preparation tips
Indian Forest Service Exam 2025 (IFoS) details for eligibility, syllabus, pattern, and preparation tips
Indian Forest Service Exam 2025 (IFoS) details for eligibility, syllabus, pattern, and preparation tips

Indian Forest Service Exam 2025 (IFS/IFoS) Eligibility / Qualification

Indian Forest Service Exam 2025 (IFS/IFoS) Eligibility / Qualification

Indian Forest Service Exam 2025 (IFS/IFoS) Eligibility / Qualification

Indian Forest Service Exam 2025 (IFS/IFoS) Eligibility / Qualification

Eligibility 

To appear for the Indian Forest Service (IFS) Exam 2025, candidates must satisfy several essential eligibility criteria laid down by the Union Public Service Commission (UPSC). These criteria ensure only suitable candidates with the required educational background, age limits, physical fitness, and nationality can participate in this prestigious exam. Below is a detailed overview of all eligibility aspects:

Nationality

A candidate must be:

  • A citizen of India, OR

  • A subject of Nepal or Bhutan, OR

  • A Tibetan refugee who came to India before January 1, 1962, intending to permanently settle, OR

  • A Person of Indian Origin (PIO) who has migrated from Pakistan, Burma, Sri Lanka, East African countries (Kenya, Uganda, Tanzania, Zambia, Malawi, Zaire, Ethiopia), or Vietnam with the intention of permanent residence in India.

Note: Candidates other than Indian citizens must provide a certificate of eligibility issued by the Government of India.

Age Limit

As of August 1, 2025, candidates must be between:

  • Minimum age: 21 years

  • Maximum age: 32 years (for General category candidates)

Relaxation in upper age limit is applicable as follows:

Category

Relaxation Period

Maximum Age Limit

Other Backward Classes (OBC)

3 years

35 years

Scheduled Caste/Scheduled Tribe

5 years

37 years

Defence Services Personnel (disabled in operations)

3 years

35 years

Ex-servicemen (Commissioned Officers, ECOs/SSCOs)

5 years

37 years

Persons with Benchmark Disabilities (PwBD)

10 years

42 years

Educational Qualifications

Candidates must hold a Bachelor’s degree from a recognized university with at least one of the following subjects:

  • Animal Husbandry & Veterinary Science

  • Botany

  • Chemistry

  • Geology

  • Mathematics

  • Physics

  • Statistics

  • Zoology

Alternatively, candidates with a Bachelor’s degree in:

  • Agriculture

  • Forestry

  • Engineering (any discipline)

are also eligible.

Number of Attempts

The maximum number of attempts permitted varies by category:

Category

Number of Attempts

General Category

6

Other Backward Classes (OBC)

9

Scheduled Caste (SC) / Scheduled Tribe (ST)

Unlimited

Persons with Disabilities (PwBD) in General/OBC

9

Candidates should note that attempts are counted only if the candidate appears for the Preliminary Examination.

Physical and Medical Standards

Candidates must satisfy the physical and medical standards specified by UPSC for Indian Forest Service recruitment. These include but are not limited to:

  • Minimum height:

    • Male candidates: 163 cm

    • Female candidates: 150 cm
      (Relaxations may apply for candidates from certain regions or categories.)

  • Chest measurements for male candidates: 79 cm normal, 84 cm expanded (relaxable for specific categories)

  • Good mental and physical health to handle fieldwork and administrative challenges in forest and wildlife management.

Detailed medical standards are specified in the official UPSC notification and must be adhered to strictly.

Additional Important Points

  • Candidates must fulfill all eligibility criteria at the time of applying and must provide valid supporting documents during the application process.

  • The Commission provides a period post-Prelims for qualified candidates to fill in cadre preferences and update necessary information before the Main exam.

  • Any failure to meet eligibility or provide required documents can lead to cancellation of candidature at any stage.

To enhance your UPSC preparation check Top UPSC Online Apps That Toppers Swear By in 2025

UPSC IFoS Exam Date 2025

UPSC IFoS Exam Date 2025

UPSC IFoS Exam Date 2025

UPSC IFoS Exam Date 2025

The commission has confirmed the exam dates for the Indian Forest Service (IFoS) Exam 2025. The Prelims took place on 25th May 2025, and will be followed by the UPSC IFoS Mains Exam 2025. The IFoS Mains is scheduled to begin on 16th November 2025, with the detailed timetable to be released soon.

Exam Event

Dates

UPSC CSE Application Dates

22 Jan – 21 Feb 2025

UPSC CSE Application Edit Dates

22 Feb – 28 Feb 2025

UPSC Prelims Exam Date

25 May 2025 (single day)

UPSC CSE Mains Exam Date

22 Aug 2025 onwards (5 days)

UPSC IFoS Mains Exam Date

16 Nov 2025 onwards (5 days)

Indian Forest Service Exam 2025 Pattern

Indian Forest Service Exam 2025 Pattern

Indian Forest Service Exam 2025 Pattern

Indian Forest Service Exam 2025 Pattern

The IFS Exam has three stages: Preliminary, Main, and Interview.

  • Preliminary Exam: Two compulsory papers of 200 marks each (General Studies and Aptitude/CSAT). Both papers are objective (MCQs); Paper II (CSAT) is qualifying (33%). This stage is a screening test – marks do not count toward final ranking. Wrong answers incur 1/3 negative marking.

  • Main Exam (Written): Six descriptive papers. 

    • Paper I is General English (300 marks)

    • Paper II is General Knowledge (300 marks). 

    • Papers III–VI are optional subjects: two chosen subjects, with two papers each (200 marks each). 

Each paper’s duration is 3 hours, and all answers must be in English. Only scripts of candidates who qualify on GK paper are evaluated further.

  • Interview/Personality Test: 300 marks. Candidates who clear the written Main exam are called for a personal interview.

Each stage is eliminatory. The final rank is based on the total marks from the Main written (1400) and interview (300). See the table below for a breakdown:

Stage

Papers

Marks

Duration per Paper

Preliminary

2 (GS & CSAT)

400 total

2 hrs each

Main (Written)

6 (Eng. & GK, plus 4 Optional)

1400 total (300+300+4×200)

3 hrs each

Interview

1 (Personality Test)

300

Final Total

1700

List Indian Forest Service Exam Optional Subjects

List Indian Forest Service Exam Optional Subjects

List Indian Forest Service Exam Optional Subjects

List Indian Forest Service Exam Optional Subjects

Candidates appearing for the Indian Forest Service (IFS) Mains Exam 2025 must choose two optional subjects from a specified list of 14 disciplines. Each optional subject consists of two papers (Paper I and Paper II), each carrying 200 marks, for a total of 800 marks in the Mains written exam.

  • Agriculture

  • Agricultural Engineering

  • Animal Husbandry & Veterinary Science

  • Botany

  • Chemistry

  • Chemical Engineering

  • Civil Engineering

  • Forestry

  • Geology

  • Mathematics

  • Mechanical Engineering

  • Physics

  • Statistics

  • Zoology

Important Notes on Subject Combinations

UPSC has mandated certain restrictions on the combinations of optional subjects candidates can choose. This is to ensure a fair selection process and avoid significant overlaps in the syllabus of certain related subjects.

The following combinations are NOT allowed:

  • Agriculture and Agricultural Engineering

  • Agriculture and Animal Husbandry & Veterinary Science

  • Agriculture and Forestry

  • Chemistry and Chemical Engineering

  • Mathematics and Statistics

Additionally, candidates can choose only one subject from the Engineering disciplines, which include Agricultural Engineering, Chemical Engineering, Civil Engineering, and Mechanical Engineering.

Indian Forest Service Exam 2025 Syllabus

Indian Forest Service Exam 2025 Syllabus

Indian Forest Service Exam 2025 Syllabus

Indian Forest Service Exam 2025 Syllabus

The Indian Forest Service (IFS) Exam 2025 syllabus is divided into two major stages — the Preliminary Exam and the Main Exam. Understanding the detailed syllabus for both is essential for systematic preparation.

IFoS 2025 Preliminary Exam Syllabus

The Preliminary Exam is a screening test consisting of two compulsory papers, both objective (multiple-choice questions):

  1. Paper I: General Studies (200 marks)

    • Current events of national and international importance

    • History of India and Indian National Movement

    • Indian and World Geography (Physical, Social, Economic)

    • Indian Polity and Governance (Constitution, Political System, Panchayati Raj, Public Policy)

    • Economic and Social Development (Sustainable Development, Poverty, Inclusion)

    • Environmental Ecology, Biodiversity, and Climate Change — important for forestry

    • General Science

  2. Paper II: CSAT (Civil Services Aptitude Test) (200 marks) – Qualifying Paper

    • Comprehension

    • Interpersonal skills including communication skills

    • Logical reasoning and analytical ability

    • Decision-making and problem-solving

    • Basic numeracy (numbers and their relations, orders of magnitude, etc.), data interpretation (charts, graphs, tables)

Note: Paper II (CSAT) is qualifying in nature and candidates must score at least 33% to qualify.

IFoS 2025 Main Exam Syllabus

The Main Exam consists of six descriptive papers, which carry a total of 1400 marks. All papers are to be answered in English.

  1. Paper I: General English (300 marks)

    • Essay writing

    • Precis writing

    • Comprehension passage

    • English language skills to assess writing ability and understanding

  2. Paper II: General Knowledge (300 marks)

    • General awareness integrated with scientific aspects

    • Current national and international affairs related to environment and forestry

    • Indian polity and constitution

    • History of India

    • Geography of India and the world

    • Basic science concepts relevant to environment and forests

  3. Papers III & IV: Optional Subject 1 (Two Papers, 200 marks each)

    • Deep syllabus of the chosen optional subject at an Honours degree level

    • Covers theory, applied aspects, and practical knowledge relevant to the subject

  4. Papers V & VI: Optional Subject 2 (Two Papers, 200 marks each)

    • Again, detailed theory and applied syllabus of the second chosen optional subject

    • Evaluates understanding of scientific, technical, or forestry-related topics

For complete syllabus details, refer to the official UPSC notification or download the IFS syllabus PDF from the UPSC website. (The syllabus is published in Appendix – Section III of the exam notice.)













Indian Forest Service Exam Post List 2025

Indian Forest Service Exam Post List 2025

Indian Forest Service Exam Post List 2025

Indian Forest Service Exam Post List 2025

Upon selection for the Indian Forest Service Exam 2025, candidates will enter a training phase as probationary officers. Following the successful completion of this training, they commence their professional journey at the Junior Time Scale (JTC) level. The starting IFoS Salary 2025 at this rank is INR 56,100, with subsequent increases based on promotions and advancements within the service.

Grade

Designation in State Government

Designation in Government of India

Junior Time Scale

Assistant Conservator of Forests / Assistant Deputy Conservator of Forests

Assistant Inspector General of Forests

Senior Time Scale

Deputy Conservator of Forests

Assistant Inspector General of Forests

Junior Administrative Grade

Deputy Conservator of Forests

Assistant Inspector General of Forests

Selection Grade

Deputy Conservator of Forests (Selection Grade)

Assistant Inspector General of Forests

Super Time Scale

Conservator of Forests / Chief Wildlife Warden

Deputy Inspector General of Forests

Senior Administrative Grade

Chief Conservator of Forests

Inspector General of Forests

HAG Scale

Additional Principal Chief Conservator of Forests

HAG+ Scale

Principal Conservator of Forests

Additional Director General of Forests

Apex Scale

Principal Chief Conservator of Forests (Head of Forest Force)

Director-General of Forests

FAQ's

Q. What is the eligibility for the Indian Forest Service Exam? 
A. An IFS aspirant must be an Indian citizen (or specified category), age 21–32 (relaxations for SC/ST/OBC/PwBD), and hold a Bachelor’s degree in the required science/engineering/forestry subjects.

Q. What is the pattern of the Indian Forest Service exam 2025 (IFoS 2025)?
A. The exam has three stages: Prelims (2 papers, GS & CSAT, 200 marks each), Mains (6 papers: General English and GK – 300 marks each, plus 4 optional papers of 200 each), and a 300-mark interview.

Q. When is the Indian Forest Service Exam 2025? 
A. UPSC IFS 2025 Prelims will be on 25 May 2025. The IFS Mains is scheduled to start on 16 November 2025. (Prelims results are out in June; interviews follow mains.)

Q. What are the optional subjects for the IFS 2025 exam? 
A. There are 14 optionals: Agriculture, Agricultural Engineering, Animal Husbandry & Veterinary Science, Botany, Chemistry, Chemical Engineering, Civil Engineering, Forestry, Geology, Mathematics, Mechanical Engineering, Physics, Statistics, Zoology. You must pick any two (subject to some barred combinations).

Conclusion

In summary, the Indian Forest Service Exam 2025 requires rigorous preparation in both general studies and specialized forestry/environment topics. Aspirants should note the key dates (Prelims on 25 May, Mains in Nov) and ensure they meet eligibility (age and education). The exam pattern – two Prelims papers, six Mains papers (including 2 optionals) and an interview – is similar to the Civil Services Exam, but with a strong emphasis on ecological themes. Understanding forest conservation, wildlife management and environmental policies is crucial not only for the exam but for future public service. With about 150 vacancies, competition is stiff; a balanced strategy covering NCERTs, standard reference books, and regular practice will help aspirants excel. The IFS is a prestigious career for those passionate about India’s forests and wildlife, contributing to sustainable governance of our natural heritage.

Related Blogs :

Latest UPSC Exam 2025 Updates

Latest UPSC Exam 2025 Updates

UPSC Notification 2025 was released on 22nd January 2025.

UPSC Calendar 2026 is released on 15th May, 2025.

The UPSC Vacancy 2025 were released 1129, out of which 979 were for UPSC CSE and remaining 150 are for UPSC IFoS.

UPSC Mains 2025 will be conducted on 22nd August 2025.

UPSC Prelims 2026 will be conducted on 24th May, 2026 & UPSC Mains 2026 will be conducted on 21st August 2026.

The UPSC Selection Process is of 3 stages-Prelims, Mains and Interview.

UPSC Result 2024 is released with latest UPSC Marksheet 2024. Check Now!

UPSC Toppers List 2024 is released now. Shakti Dubey is UPSC AIR 1 2024 Topper.

Suggested blogs

PadhAI UPSC App

We're PadhAI - a free UPSC prep app built by IITians, AI PhDs & top UPSC experts.

Why choose PadhAI?

Read daily top news (TH & IE) & Solve Current Affairs MCQs
Topic-wise search of 30+ yrs PYQs
24×7 AI tutor for doubt resolution
Practice 30k+ MCQs & full GS + CSAT mocks
Play Duel UPSC quizzes with fellow aspirants

Why choose PadhAI?

Read daily top news (TH & IE) & Solve Current Affairs MCQs
Topic-wise search of 30+ yrs PYQs
24×7 AI tutor for doubt resolution
Practice 30k+ MCQs & full GS + CSAT mocks
Play Duel UPSC quizzes with fellow aspirants

PadhAI UPSC App

We're PadhAI - a free UPSC prep app built by IITians, AI PhDs & top UPSC experts.

PadhAI UPSC App

We're PadhAI - a free UPSC prep app built by IITians, AI PhDs & top UPSC experts.

Why choose PadhAI?

Read daily top news (TH & IE) & Solve Current Affairs MCQs
Topic-wise search of 30+ yrs PYQs
24×7 AI tutor for doubt resolution
Practice 30k+ MCQs & full GS + CSAT mocks
Play Duel UPSC quizzes with fellow aspirants

Download PadhAI App

Don't get left behind in your preparation

Embark on your journey!

Address

1600 Shattuck Avenue, Suite 204, Berkeley, California, 94709

© 2024-2025, All Rights Reserved

Embark on your journey!

Address

1600 Shattuck Avenue, Suite 204, Berkeley, California, 94709

© 2024-2025, All Rights Reserved

Embark on your journey!

Address

1600 Shattuck Avenue, Suite 204, Berkeley, California, 94709

© 2024-2025, All Rights Reserved

Download PadhAI App

Don't get left behind in your preparation

Embark on your journey!

Address

1600 Shattuck Avenue, Suite 204, Berkeley, California, 94709

© 2024-2025, All Rights Reserved

Embark on your journey!

Address

1600 Shattuck Avenue, Suite 204, Berkeley, California, 94709

© 2024-2025, All Rights Reserved

Download PadhAI App

Don't get left behind in your preparation