The Intelligence Bureau (IB) Assistant Central Intelligence Officer (ACIO) exam is one of the most competitive and sought-after exams for individuals aspiring to work in India’s premier intelligence agency. With the 2026 exam approaching, it is essential to be well-versed with the syllabus and exam pattern to maximize the chances of success. This article provides a detailed overview of the IB ACIO Syllabus 2026 and the associated exam pattern.
IB ACIO Syllabus 2026
The IB ACIO (Intelligence Bureau Assistant Central Intelligence Officer) exam is a highly competitive recruitment process conducted by the Ministry of Home Affairs, Government of India. The IB ACIO syllabus for the 2026 examination is designed to assess candidates’ proficiency in various subjects such as General Intelligence, General Awareness, English, and Quantitative Aptitude. It is divided into two phases: a written test and an interview. The written exam includes objective-type questions, and the selection process is rigorous. Understanding the detailed syllabus is crucial for aspiring candidates to prepare effectively and secure a position in this prestigious government organization.
Overview of IB ACIO Exam 2026
The IB ACIO exam is conducted by the Ministry of Home Affairs (MHA) to recruit candidates for the post of Assistant Central Intelligence Officer (ACIO) Grade II. The role offers an exciting opportunity for those interested in national security, intelligence gathering, and law enforcement. The exam is typically divided into two stages:
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Tier-I: Written Examination
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Tier-II: Descriptive Test (for selected candidates from Tier-I)
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Tier-III: Interview (final selection)
To prepare for the exam, candidates need to be familiar with the detailed syllabus and exam pattern to ensure they cover all important topics.
IB ACIO Exam Pattern 2026
1. Tier-I: Written Exam (Objective Type)
The Tier-I exam is a multiple-choice question (MCQ)-based test. The total marks for the written examination are 100, and the duration of the exam is 60 minutes. The Tier-I exam is divided into four sections:
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General Awareness (20 questions) – 20 marks
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Quantitative Aptitude (20 questions) – 20 marks
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Logical/Analytical Ability (20 questions) – 20 marks
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English Language (20 questions) – 20 marks
Each section will have 20 questions, each carrying 1 mark. The total number of questions will be 80. The exam will also have negative marking for wrong answers; for each incorrect response, 1/4th of the mark allotted to the question will be deducted.
2. Tier-II: Descriptive Exam
Candidates who clear Tier-I will be eligible for the Tier-II descriptive exam. This phase evaluates candidates’ written communication skills. The Tier-II exam consists of:
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Essay Writing: Candidates are asked to write an essay on a given topic (30 marks).
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English Comprehension and Précis Writing: This section evaluates the candidate’s ability to understand, summarize, and paraphrase given passages (20 marks).
The total marks for Tier-II are 50, and candidates need to score at least 40% in this section to move on to the next stage, which is the interview.
3. Tier-III: Interview
The final stage of the selection process is the interview, where candidates are assessed based on their personality, general awareness, intelligence, and suitability for the job role. The interview carries 100 marks, and candidates must score well in this stage to secure a final selection.
IB ACIO Syllabus 2026
Get the detailed IB ACIO Syllabus 2026 to prepare well for the exam and get good marks.
1. IB ACIO General Awareness Syllabus 2026
This section tests a candidate’s knowledge of current affairs, national and international events, politics, economics, and history. The key topics include:
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National and International News: Current affairs related to politics, sports, science, and technology.
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Indian History and Geography: Focus on historical events, geographical locations, and important discoveries.
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Economics and Finance: Basic understanding of economics, economic policies, and current economic trends.
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General Science: Scientific advancements, important inventions, and discoveries.
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Sports: Major sports events, athletes, and related knowledge.
2. IB ACIO Quantitative Aptitude Syllabus 2026
This section evaluates the candidate’s ability to perform calculations and analyze numerical data. Key topics include:
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Number Systems
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Algebra
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Profit and Loss
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Time and Work
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Percentage
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Ratio and Proportion
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Simple and Compound Interest
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Speed, Distance, and Time
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Data Interpretation
3. IB ACIO Logical and Analytical Ability Syllabus
This section assesses the candidate’s reasoning and problem-solving skills. The major topics covered include:
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Verbal and Non-Verbal Reasoning
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Coding-Decoding
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Blood Relations
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Syllogisms
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Analogies
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Series
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Direction Sense
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Data Sufficiency
4. IB ACIO English Language Syllabus
The English Language section tests a candidate’s proficiency in English, including grammar, comprehension, and vocabulary. Key topics include:
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Reading Comprehension
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Grammar and Sentence Correction
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Vocabulary
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Synonyms and Antonyms
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Idioms and Phrases
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Fill in the Blanks
5. IB ACIO Essay Writing & Precis Writing (Tier-II) Syllabus
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Essay Writing: Candidates are expected to write an essay on a given topic. The essay will test the candidate’s ability to express ideas clearly, concisely, and logically.
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Precis Writing: In this section, candidates are asked to summarize a passage in their own words. The key skills tested are the ability to understand, summarize, and present the essence of the passage in a brief format.
IB ACIO Syllabus Analysis 2026
IB ACIO Syllabus Analysis 2026 (for Intelligence Bureau Assistant Central Intelligence Officer exam) presented in a tabular format for easy understanding:
Tier 1 (Objective Exam)
| Section | Topics Covered | Weightage (Approx) | Difficulty Level | Most Scoring Areas |
|---|---|---|---|---|
| General Awareness | Current Affairs, Static GK, History, Polity, Geography, Economy, Science | 20-25% | Medium | Current Affairs, Polity |
| Quantitative Aptitude | Simplification, Percentage, Ratio, Profit & Loss, SI-CI, Time & Work, Speed-Distance | 15-20% | Easy–Moderate | Arithmetic (Percentage, Ratio) |
| Logical/Analytical Ability | Coding-Decoding, Series, Blood Relations, Direction, Syllogism, Puzzle | 20-25% | Moderate | Coding-Decoding, Series |
| English Language | Reading Comprehension, Cloze Test, Error Detection, Fill in the blanks, Synonyms-Antonyms | 20-25% | Easy–Moderate | RC, Error Detection |
| General Studies (Mixed) | Basic Science + Miscellaneous Awareness | 10-15% | Easy | Static GK |
Section-wise Detailed Analysis
General Awareness
| Sub-topic | Importance | तैयारी रणनीति |
|---|---|---|
| Current Affairs (6 months) | Very High | Daily newspaper + monthly magazine |
| Indian Polity | High | Constitution, Fundamental Rights |
| History | Medium | Modern History focus |
| Geography | Medium | India & World basics |
| Economy | Medium | Budget, schemes |
| Science | Low–Medium | Basic Physics, Biology |
Quantitative Aptitude
| Sub-topic | Importance | Difficulty |
|---|---|---|
| Percentage | High | Easy |
| Ratio & Proportion | High | Easy |
| Profit & Loss | Medium | Easy |
| Time & Work | Medium | Moderate |
| SI & CI | Medium | Easy |
| Number System | Low | Moderate |
Logical Reasoning
| Sub-topic | Importance | Difficulty |
|---|---|---|
| Coding-Decoding | High | Easy |
| Series (Number/Alphabet) | High | Easy |
| Blood Relations | Medium | Easy |
| Direction Sense | Medium | Easy |
| Puzzle | Medium | Moderate |
| Syllogism | Low–Medium | Moderate |
English Language
| Sub-topic | Importance | Difficulty |
|---|---|---|
| Reading Comprehension | High | Moderate |
| Error Detection | High | Easy |
| Cloze Test | Medium | Moderate |
| Synonyms/Antonyms | Medium | Easy |
| Fill in the blanks | Medium | Easy |
Tier 2 (Descriptive Exam)
| Section | Topics | Marks | Focus Area |
|---|---|---|---|
| Essay Writing | National Security, Social Issues, Technology, Governance | 30 | Content + Structure |
| English Comprehension & Precis | Passage writing, Summary | 20 | Grammar + Writing Skills |
Tier 3 (Interview)
| Component | Focus |
|---|---|
| Personality Test | Communication, Awareness, Confidence |
| Background Questions | Education, Current Affairs |
| Situational Questions | Decision-making ability |
Overall Preparation Strategy
| Area | Strategy |
|---|---|
| Current Affairs | Last 6 months revision is must |
| Static GK | NCERT + Lucent GK |
| Maths | Focus on basic formulas + speed |
| Reasoning | Practice daily (most scoring section) |
| English | Improve grammar + reading habit |
| Descriptive | Practice essays weekly |
How to Prepare for IB ACIO 2026?
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Understand the Syllabus: Thoroughly read and understand the syllabus, and plan your preparation accordingly. Divide your time based on the sections of the syllabus.
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Practice Regularly: Regular practice of previous years’ question papers, mock tests, and sample papers is essential for improving speed and accuracy.
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Focus on Current Affairs: Stay updated with national and international events. Reading newspapers and following news portals can significantly improve your general awareness.
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Improve English Proficiency: Practice grammar exercises, reading comprehension, and vocabulary building daily to strengthen your English skills.
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Time Management: Work on managing time efficiently during the exam, especially when taking the Tier-I objective test. Set time limits for each section during practice.
Conclusion
The IB ACIO 2026 exam is a golden opportunity for candidates aiming to build a career in intelligence and security. By understanding the syllabus and exam pattern in detail, candidates can create an effective study plan and improve their chances of selection. Regular practice, combined with strategic preparation, will ensure that you’re well-prepared to tackle each section of the exam with confidence.
FAQs
1. What is the structure of the IB ACIO 2026 examination?
The IB ACIO 2026 examination comprises three stages:
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Tier 1 (Objective Type): 100 multiple-choice questions covering Current Affairs, General Studies, Numerical Aptitude, Reasoning, and English Language.
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Tier 2 (Descriptive Type): An essay writing section (30 marks) and English comprehension & précis writing (20 marks).
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Tier 3 (Interview): A personal interview assessing the candidate’s suitability for the role.
2. What subjects are included in the IB ACIO 2026 syllabus?
The syllabus encompasses the following subjects:
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Quantitative Aptitude: Topics include Number Systems, Percentages, Mensuration, Ratio and Time, Averages, Profit and Loss, Fundamental Arithmetical Operations, Computation of Whole Numbers, Use of Tables and Graphs, Decimals, Relationship between Numbers, Operations Research & Linear Programming, Differential Geometry, Dynamics, Essential Mathematics, Calculus, Real Analysis, Time and Distance, Ratio and Proportion, Interest, Discount, Algebra, Differential Equations, Statistics, Fractions, Analytical Geometry, LCM and HCF, Factoring, Age Problems, Missing Numbers, Average, Prices and Expenditure Problems, Simple and Compound Interest, Time and Work, Mensuration, Volume, Time and Distance, Fractions, Series Completion.
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General Studies: History, Physics, Biology, Current Affairs, Science & Technology, Static GK, Indian Polity & Constitution, Economy & Finance, Geography, Chemistry.
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Numerical Ability & Reasoning: Alphanumeric Series, Reasoning Analogies, Artificial Language, Blood Relations, Calendars, Cause and Effect, Clocks, Coding-Decoding, Data Sufficiency, Decision Making, Directions, Input-Output, Odd One Out, Puzzles, Order & Ranking, Statement and Assumptions, Statement and Conclusions.
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English Language: Spellings Correction, One Word Substitution, Sentence Improvement, Verbal Comprehension Passage, Adjectives, Detecting Misspelled Words, Idioms and Phrases, Passage, Verbs, Clauses, Fill in the Blanks, Spot the Error, Synonyms/Antonyms, Vocabulary, Grammar, Sentence Structure.
3. Is there any negative marking in the IB ACIO 2026 examination?
Yes, there is a negative marking of ¼ mark for each incorrect answer in the IB ACIO Tier 1 examination.
4. What is the minimum qualifying mark for the IB ACIO Tier 2 examination?
Candidates must secure at least 33% marks in the Tier 2 examination to qualify for the interview stage.
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