UPSC & Central Govt · Updated October 2026
UPSC IFoS ExamEligibility, Syllabus, Exam Pattern, Salary, Cut-Off, PYQs and Free Mock Test
UPSC Indian Forest Service (IFoS)
Conducted by the UPSC, this All-India Service examination recruits officers for the scientific management, ecological conservation, and administration of India's forest and wildlife resources. Candidates qualify through the common CSE Preliminary screening followed by a dedicated technical Mains and Personality Test.
- Type
- Recruitment
- Level
- National
- Conducting body
- UPSC
Start for free with UPSC IFoS syllabus study notes, solved previous year papers, real-pattern mock tests and AI Tutor support.
UPSC IFoS exam overview and highlights
About UPSC IFoS
The Indian Forest Service Examination (IFoS) is conducted by UPSC to recruit officers for the Indian Forest Service, one of the three All India Services. Candidates appear in the common Civil Services Preliminary Examination and those who clear the separate IFoS cut-off go on to a dedicated main examination and interview. Officers manage forests, wildlife and environment at the state and central level.
The examination process for UPSC IFoS comprises 3 stages: Prelims (common with CSE), followed by Mains, followed by Personality Test (Interview). The official syllabus tests candidates across 4 core areas — General Studies (Prelims), General English (Mains), General Knowledge (Mains), Optional subjects — focusing on conceptual clarity, speed, and accuracy. Prelims is a screening stage with a separate, usually higher, IFoS cutoff. Final merit is based on the Mains written papers (1400 marks) plus the Personality Test (300 marks); the language papers are qualifying only. Medical examination follows, with specific physical standards for the forest service.
Key subjects
- General Studies (Prelims)
- General English (Mains)
- General Knowledge (Mains)
- Optional subjects
What clearing UPSC IFoS leads to
- Indian Forest Service (IFoS) officer, usually posted as Assistant Conservator of Forests
- Compensation & Pay Scale: Pay Level 10 (basic pay around ₹56,100) plus allowances
- Central / Institutional appointment through Union Public Service Commission (UPSC) merit recommendation
- Structured time-scale promotions, Departmental Promotion Committee (DPC) elevation, and central allowances (DA, HRA, TA, Medical & NPS)
- All-India or zonal ministry, department, PSU, or public sector field and headquarters postings
- Deputation opportunities to central autonomous bodies, ministries, regulatory authorities, and international assignments
Quick facts
- Full name
- UPSC Indian Forest Service (IFoS)
- Conducting body
- Union Public Service Commission (UPSC)
- Frequency
- Once a year
- Exam mode
- Offline (OMR sheet for Prelims, pen and paper for Mains)
- Languages
- Prelims papers in English and Hindi; Mains papers must be answered in English
- Stages & papers
- 3 stages (8 papers total)
- Negative marking
- One-third of the marks of a question deducted per wrong answer in Prelims; none in Mains
- Official website
- upsc.gov.in
UPSC IFoS — Key Highlights & Official Particulars
Complete snapshot of UPSC IFoS conducting authority, frequency, mode, stages, negative marking and official portal.
| Particulars | Details |
|---|---|
| Exam Name | UPSC IFoS — UPSC Indian Forest Service (IFoS) |
| Conducting Body | Union Public Service Commission (UPSC) |
| Exam Category | UPSC & Central Govt |
| Exam Level | National level |
| Exam Type & Purpose | Recruitment (Direct Recruitment & Cadre Selection) |
| Exam Frequency | Once a year |
| Usual Notification & Exam Window | Notification in February along with the CSE notification; common Prelims in late May or June; IFoS Mains in November or December; personality tests in the following months |
| Mode of Application | Online on upsc.gov.in through the One Time Registration (OTR) portal; a single application in which the candidate opts for CSE, IFoS or both |
| Mode of Examination | Offline (OMR sheet for Prelims, pen and paper for Mains) |
| Medium / Exam Languages | Prelims papers in English and Hindi; Mains papers must be answered in English |
| Selection Stages | 3 Stages (8 Papers Total): Prelims (common with CSE) → Mains → Personality Test (Interview) |
| Negative Marking | One-third of the marks of a question deducted per wrong answer in Prelims; none in Mains |
| Selection / Merit Process | Prelims is a screening stage with a separate, usually higher, IFoS cutoff. Final merit is based on the Mains written papers (1400 marks) plus the Personality Test (300 marks); the language papers are qualifying only. Medical examination follows, with specific physical standards for the forest service. |
| Educational Qualification | Bachelor's degree with at least one of animal husbandry and veterinary science, botany, chemistry, geology, mathematics, physics, statistics or zoology, or a bachelor's degree in agriculture, forestry or engineering |
| Age Limit | 21 to 32 years on 1 August of the exam year for the general category, with the usual relaxations |
| Pay Scale / Salary Structure | Pay Level 10 (basic pay around ₹56,100) plus allowances |
| Merit Panel Validity | Valid for the notified recruitment cycle and reserve list period |
| Competition Scale | Several lakh candidates opt for IFoS through the common Prelims, for a little over a hundred posts |
| Official Website | upsc.gov.in |
Summary for orientation only, last reviewed October 2026. Check eligibility, dates and pattern in the official notification.
UPSC IFoS exam schedule, vacancy, fee and online application process
Standard annual cycle and application workflow for UPSC IFoS. Confirm exact notification and closing dates on the official UPSC website.
| Examination Event | Typical Calendar Window | Cycle / Mode |
|---|---|---|
| UPSC IFoS Official Notification & Information Bulletin | Notification in February along with the CSE notification; common Prelims in late May or June; IFoS Mains in November or December; personality tests in the following months | Once a year |
| Online Registration & Application Fee Window | Typically remains open for 21 to 30 days from the date of notification release | Online Portal |
| Application Form Correction / Edit Window | 2 to 5 days immediately following the close of the online registration window | As Notified |
| Exam City Intimation & Admit Card Release | City slip 10–15 days prior; Hall Ticket / E-Admit Card 4 to 10 days before the exam date | Via Union Public Service Commission (UPSC) |
| UPSC IFoS — Prelims (common with CSE) | Notification in February along with the CSE notification; common Prelims in late May or June; IFoS Mains in November or December; personality tests in the following months | Offline (OMR sheet for Prelims, pen and paper for Mains) |
| UPSC IFoS — Mains | Typically 6 to 12 weeks after declaration of Stage 1 results | Shortlisted Candidates |
| Provisional Answer Key & Objection Representation Window | Within 3 to 10 days after completion of the objective examination shifts | Online Challenge |
| Final Answer Key, Normalized Result & Merit List / Scorecard | Typically 3 to 6 weeks after conclusion of the examination stage | Merit List PDF / Login |
- Vacancies & Competition
- Several lakh candidates opt for IFoS through the common Prelims, for a little over a hundred posts. Exact post-wise, department-wise, and category-wise (UR, EWS, OBC, SC, ST, ESM, PwBD) vacancies are notified in the official UPSC IFoS recruitment advertisement published by Union Public Service Commission (UPSC).
- Application Fee & Payment Norms
- Standard UPSC examination fee norms apply (typically ₹100 to ₹200 for General/OBC/EWS male candidates; Female, SC, ST, and PwBD candidates are fully exempted from payment of the application fee).
How to apply online for UPSC IFoS
One-Time Registration (OTR) & Portal Login
Visit upsc.gov.in and complete your candidate registration using a valid email ID, active mobile number, and Aadhaar / government photo ID details. Online on upsc.gov.in through the One Time Registration (OTR) portal; a single application in which the candidate opts for CSE, IFoS or both.
Fill Academic, Personal & Exam Centre Preferences
Log in to open the UPSC IFoS application form. Enter your qualifying degree/board details, category/reservation status, medium of examination (Prelims papers in English and Hindi; Mains papers must be answered in English), and choose 3 to 4 preferred test cities.
Upload Photograph, Signature & Category Certificates
Upload a recent passport-size photograph (in prescribed KB dimensions and light background), scanned running-hand signature, and valid SC/ST/OBC-NCL/EWS/PwBD/Domicile certificates where applicable.
Online Application Fee Payment & Confirmation Page
Pay the category-wise examination fee via UPI, Net Banking, Debit/Credit Card, or e-Challan before the closing deadline, then download and preserve the final UPSC IFoS Confirmation Page / Application PDF for admit card and verification stages.
UPSC IFoS eligibility criteria and age relaxation
Candidates applying for UPSC IFoS must fulfil the academic qualification, age limit, nationality and category reservation rules notified by UPSC.
Educational qualification
Bachelor's degree with at least one of animal husbandry and veterinary science, botany, chemistry, geology, mathematics, physics, statistics or zoology, or a bachelor's degree in agriculture, forestry or engineering.
Age limit & relaxations
21 to 32 years on 1 August of the exam year for the general category, with the usual relaxations.
Number of attempts
6 attempts for general and EWS, 9 for OBC, unlimited for SC and ST within the age limit.
Nationality & domicile
Indian citizen.
Other conditions & standards
Candidates must meet prescribed physical standards and clear a walking test during the medical examination.
UPSC IFoS — Category-Wise Upper Age Relaxation & Reservation Norms
| Category | Age Relaxation / Rule | Key Conditions & Documentation |
|---|---|---|
| Scheduled Caste (SC) / Scheduled Tribe (ST) (Central Government Norms) | +5 Years above prescribed upper age limit | Requires valid SC/ST certificate in the prescribed Government of India format. |
| Other Backward Classes — Non-Creamy Layer (OBC-NCL) (Central Government Norms) | +3 Years above prescribed upper age limit | Candidate must fall outside the Creamy Layer as on the crucial closing date of the online application. |
| Persons with Benchmark Disabilities (PwBD — UR / OBC / SC-ST) | +10 Years (UR) / +13 Years (OBC) / +15 Years (SC/ST) | Subject to post suitability and 40%+ benchmark disability certificate under the RPwD Act, 2016. |
| Ex-Servicemen (ESM) & Commissioned Officers (ECO / SSCO) | +3 to 5 Years after deducting military service rendered from actual age | Must produce discharge book / NOC from the competent defence authority at document verification. |
UPSC IFoS selection process and exam pattern
Negative Marking & Evaluation Rule: One-third of the marks of a question deducted per wrong answer in Prelims; none in Mains. Selection & Merit Weightage: Prelims is a screening stage with a separate, usually higher, IFoS cutoff. Final merit is based on the Mains written papers (1400 marks) plus the Personality Test (300 marks); the language papers are qualifying only. Medical examination follows, with specific physical standards for the forest service.
Stage 1: Prelims (common with CSE)
Offline (OMR sheet) • 2 Papers (Paper I: General Studies, Paper II: CSAT) • 180 Questions • 400 Total Marks • Duration: 2 hours • Candidates who opt for IFoS take the same Civil Services Preliminary Examination.
Candidates who opt for IFoS take the same Civil Services Preliminary Examination. A separate, usually higher, cut-off is applied for the IFoS Mains shortlist.
Paper / Section Questions Marks Duration Paper I: General Studies 100 200 2 hours Paper II: CSATQualifying only, 33% needed 80 200 2 hours Stage 2: Mains
Descriptive, pen and paper • 6 Papers (Paper I: General English, Paper II: General Knowledge, Paper III: Optional Subject 1, Paper 1 + 3 more) • 1400 Total Marks • Duration: 3 hours • Six descriptive papers totalling 1400 marks, including two optional subjects with two papers each.
Six descriptive papers totalling 1400 marks, including two optional subjects with two papers each. The optional subjects are science and engineering oriented and must be chosen from the permitted combinations.
Paper / Section Questions Marks Duration Paper I: General English Varies 300 3 hours Paper II: General Knowledge Varies 300 3 hours Paper III: Optional Subject 1, Paper 1 Varies 200 3 hours Paper IV: Optional Subject 1, Paper 2 Varies 200 3 hours Paper V: Optional Subject 2, Paper 1 Varies 200 3 hours Paper VI: Optional Subject 2, Paper 2 Varies 200 3 hours Stage 3: Personality Test (Interview)
In person • An interview of 300 marks.
An interview of 300 marks. The final merit list is prepared on Mains plus Interview, a total of 1700 marks, after the medical examination.
Stage 4: Document Verification, Medical Fitness & Final Cadre/Post Allotment
In-person verification by Union Public Service Commission (UPSC) • Original academic, age, category & domicile certificates • Medical fitness examination & final merit allocation
Candidates shortlisted in the final merit list undergo thorough verification of original educational, age, category and domicile certificates followed by a prescribed medical fitness examination before appointment letters and cadre/department allotments are issued.
UPSC IFoS subject-wise syllabus and study material
SmartRank organizes chapter-wise study notes for every subject below in 12 languages, with an AI Tutor on hand for doubts. Start exploring for free, and unlock the complete syllabus with Learn or SmartRank Pass.
General Studies (Prelims) — Part I (Indian history and national movement)
- Indian history and national movement
- Indian and world geography
- Indian polity and governance
General Studies (Prelims) — Part II (Economic and social development)
- Economic and social development
- Environment, ecology and biodiversity
- General science and current affairs
General English (Mains) — Part I (Essay writing)
- Essay writing
- Reading comprehension
- Precis writing
General English (Mains) — Part II (Grammar and usage)
- Grammar and usage
- Vocabulary
General Knowledge (Mains) — Part I (Current events of national and)
- Current events of national and international importance
- Indian polity and constitution
- Indian history and geography
General Knowledge (Mains) — Part II (Environment and forest related current)
- Environment and forest related current issues
- Science and technology
Optional subjects — Part I (Forestry)
- Forestry
- Agriculture
- Botany and Zoology
- Geology
Optional subjects — Part II (Chemistry, Physics and Mathematics)
- Chemistry, Physics and Mathematics
- Agricultural engineering, civil, mechanical and chemical engineering
- Animal husbandry and veterinary science
- Statistics
UPSC IFoS salary, pay scale, job profile & career growth
Pay Level 10 (basic pay around ₹56,100) plus allowances. Appointments under Union Public Service Commission (UPSC) carry structured pay progression, statutory allowances, and time-bound departmental promotions.
Pay Scale & Grade Structure
Pay Level 10 (basic pay around ₹56,100) plus allowances.
Appointing / Cadre Authority
Union Public Service Commission (UPSC) (Central Government / Public Sector Service)
Allowances & Perks
Dearness Allowance (DA), HRA (X/Y/Z cities: 30%/20%/10%), Transport Allowance, CGHS/Medical cover, LTC, and NPS contribution.
Probation & Training
Initial probation period (typically 1 to 2 years) with induction/foundation training before cadre confirmation.
Allowances, Perks & Service Benefits
- Dearness Allowance (DA) revised bi-annually in line with Consumer Price Index (AICPI)
- House Rent Allowance (HRA) or official government quarters / leased accommodation
- Transport Allowance (TA), Leave Travel Concession (LTC), and Children Education Allowance
- Comprehensive medical care (CGHS / ECHS / State Health Scheme) for employee and dependents
- National Pension System (NPS) employer contribution, gratuity, and paid maternity/paternity/study leave
Promotion Hierarchy & Career Progression
- Entry-Level Cadre Appointment (Post allotment & induction training under Union Public Service Commission (UPSC))
- Senior / Higher Grade Scale via Time-Bound Financial Upgradation (MACP / Dynamic ACP)
- Sectional / Supervisory / Inspector / Assistant Executive Cadre via Departmental Promotion Committee (DPC) or LDCE
- Middle Management / Gazetted / Divisional Officer Scale
- Senior Administrative / Directorate / Executive Leadership Cadre
UPSC IFoS cut-off trends, score normalization and safe target score
Union Public Service Commission (UPSC) releases stage-wise and category-wise UPSC IFoS cut-off marks at each stage (Prelims/Tier-I shortlisting, Mains/Tier-II evaluation, and Final Merit List). Candidates must clear both minimum qualifying standards and overall/sectional merit cut-offs to advance.
UPSC IFoS — Qualifying Standards & Safe Target Benchmarks
| Category | Qualifying Floor / Standard | Recommended Safe Target |
|---|---|---|
| General / Unreserved (UR) | 30% to 40% Minimum Qualifying Floor | 72% to 82% of Total Marks (95+ Percentile in Mock Tests) |
| General — Economically Weaker Section (GEN-EWS) | 25% to 35% Minimum Qualifying Floor | 68% to 78% of Total Marks |
| Other Backward Classes (OBC-NCL) | 25% to 35% Minimum Qualifying Floor | 68% to 78% of Total Marks |
| Scheduled Caste (SC) / Scheduled Tribe (ST) / PwBD | 20% to 30% Minimum Qualifying Floor | 58% to 70% of Total Marks |
Score Normalization & Marking Impact
Because UPSC IFoS is evaluated on a uniform single-session paper scale under one-third of the marks of a question deducted per wrong answer in Prelims; none in Mains, raw score accuracy directly determines your rank on the official merit list.
Factors Determining UPSC IFoS Cut-Off
- Total number of notified vacancies / available seats across participating cadres and institutions
- Total number of registered vs actual appearing candidates in the UPSC IFoS cycle
- Relative difficulty level of the question paper (and shift-wise variation in multi-shift CBT exams)
- Category-wise vertical (UR, EWS, OBC-NCL, SC, ST) and horizontal (PwBD, ESM, Women) reservation ratios
- Previous year cut-off trajectory and candidate score distribution at the top percentiles
UPSC IFoS admit card, answer key and result guide
City slip 10–15 days prior • Admit Card 4–10 days before exam
UPSC IFoS Exam City Intimation & Admit Card
Union Public Service Commission (UPSC) releases the advance Exam City Intimation Slip followed by the official UPSC IFoS Hall Ticket / e-Admit Card on upsc.gov.in. No hard copy is sent by post; candidates must log in with their Registration Number and Date of Birth / Password to download it.
- Clear A4 printout of the UPSC IFoS e-Admit Card with visible barcode and photograph
- Original valid Government Photo ID (Aadhaar Card, Passport, Voter ID, Driving Licence, or PAN Card)
- 2 recent passport-size photographs matching the image uploaded in the online application
- PwBD / Scribe certificate and undertaking (if availing compensatory time or scribe facility)
Within 3–10 days after the examination
UPSC IFoS Provisional Answer Key & Objection Window
After conclusion of the objective test, Union Public Service Commission (UPSC) uploads the candidate response sheet and Provisional Answer Key on upsc.gov.in. Candidates can calculate their raw score and submit online representations against any ambiguous question or key discrepancy within the stipulated 48–72 hour window.
- Download your recorded Response Sheet PDF and match Question IDs with the Master Answer Key
- Calculate raw score using the official positive and negative marking formula
- Attach standard textbook / NCERT / official gazette proof if challenging any provisional key
- Review the Final Answer Key published after subject-expert scrutiny of all representations
3–6 weeks after stage completion
UPSC IFoS Result, Scorecard & Merit List / Counselling
Union Public Service Commission (UPSC) declares the UPSC IFoS result as a stage-wise Merit List PDF (with roll numbers and category cut-offs) and individual Normalized Scorecards on upsc.gov.in. Shortlisted candidates proceed to the next stage, Document Verification, or Centralised Counselling.
- Download and save your official UPSC IFoS Scorecard / Rank Letter PDF immediately upon release
- Verify category-wise and sectional cut-off marks in the official result write-up notice
- Keep original matriculation, degree, caste/EWS, and domicile certificates ready for verification
- Track reserve list / multi-round seat allotment updates on the official website
UPSC IFoS mock tests
Practice in the official UPSC IFoS pattern on the Free plan, and unlock 10 full or sectional mocks every month, unlimited chapter and topic tests, and the CBT Exam Simulator with SmartRank Pass.
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UPSC IFoS Full Mock Test 1
Prelims (common with CSE) · 100 questions · 2 hours
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UPSC IFoS Full Mock Test 2
Prelims (common with CSE) · 100 questions · 2 hours
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UPSC IFoS Full Mock Test 3
Prelims (common with CSE) · 100 questions · 2 hours
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UPSC IFoS Full Mock Test 4
Prelims (common with CSE) · 100 questions · 2 hours
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UPSC IFoS Full Mock Test 5
Prelims (common with CSE) · 100 questions · 2 hours
UPSC IFoS previous year papers
Papers come with a solution for every question. Read them, or attempt them as timed tests. See all UPSC IFoS previous year papers by year
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Recent UPSC IFoS question papers
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Complete 10-year UPSC IFoS paper archive
Up to 10 years of solved papers with SmartRank Pass (4 years with Learn)
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Predicted questions for UPSC IFoS
High-probability questions and topics for your next exam
How to prepare for UPSC IFoS
- Prepare General Studies Paper I thoroughly because the IFoS Prelims cut-off is generally higher than the CSE cut-off.
- Pick optional subjects from your own degree background; Forestry and Agriculture are popular because the syllabus is well defined.
- Build environment and forestry current affairs notes, as they appear in both the General Knowledge paper and the interview.
- Practice precis and essay writing for the General English paper, which carries 300 marks.
- Keep your physical fitness in mind; the walking test and physical standards are mandatory.
- Read the official UPSC IFoS notification carefully for the exact pattern, eligibility and selection stages.
UPSC IFoS FAQs
Is the IFoS Prelims the same as the UPSC CSE Prelims?
Yes, there is a single common preliminary examination. Candidates who tick IFoS in the application are shortlisted for IFoS Mains on a separate cut-off.
Who is eligible for UPSC IFoS?
Graduates with at least one subject among animal husbandry and veterinary science, botany, chemistry, geology, mathematics, physics, statistics or zoology, or a degree in agriculture, forestry or engineering. Arts and commerce graduates without these subjects are not eligible.
How many optional subjects are there in IFoS Mains?
Two optional subjects, each with two papers of 200 marks. Certain combinations such as Agriculture with Agricultural Engineering are not allowed.
What is the age limit for IFoS?
21 to 32 years on 1 August of the exam year for general candidates, with 3 years of relaxation for OBC and 5 years for SC and ST.
Can I write IFoS Mains in Hindi?
No, the IFoS Mains papers must be answered in English only, unlike CSE Mains where a scheduled language can be used.
What is the selection process and exam pattern for UPSC IFoS?
UPSC IFoS is conducted by Union Public Service Commission (UPSC) across 3 stages: Prelims (common with CSE) → Mains → Personality Test (Interview). Prelims is a screening stage with a separate, usually higher, IFoS cutoff. Final merit is based on the Mains written papers (1400 marks) plus the Personality Test (300 marks); the language papers are qualifying only. Medical examination follows, with specific physical standards for the forest service.
What is the age limit and educational qualification for UPSC IFoS?
Educational Qualification: Bachelor's degree with at least one of animal husbandry and veterinary science, botany, chemistry, geology, mathematics, physics, statistics or zoology, or a bachelor's degree in agriculture, forestry or engineering. Age Limit: 21 to 32 years on 1 August of the exam year for the general category, with the usual relaxations.
Is there negative marking in the UPSC IFoS exam?
Yes — One-third of the marks of a question deducted per wrong answer in Prelims; none in Mains. Candidates should use a two-pass attempt strategy during mock tests to keep accuracy above 85% and minimise negative marking deductions.
What is the salary and job profile after clearing UPSC IFoS?
Pay Level 10 (basic pay around ₹56,100) plus allowances.
When is the UPSC IFoS notification released and how can I apply online?
UPSC IFoS is held once a year (Notification in February along with the CSE notification; common Prelims in late May or June; IFoS Mains in November or December; personality tests in the following months). Online on upsc.gov.in through the One Time Registration (OTR) portal; a single application in which the candidate opts for CSE, IFoS or both.
How can I prepare for UPSC IFoS on SmartRank?
Select UPSC IFoS as your target exam on SmartRank to get chapter-by-chapter study material built around its syllabus covering General Studies (Prelims), General English (Mains), General Knowledge (Mains), Optional subjects, solved previous year question papers, topic and full-length mock tests in the exact UPSC IFoS pattern, a timed exam simulator, subject-wise analytics, an adaptive daily study plan and an AI Tutor.