IB ACIO Syllabus 2026: Check Complete Tier 1, Tier 2 Syllabus, Exam Pattern and Preparation Strategy.Preparing for the IB ACIO 2026 exam becomes much easier when you know exactly what to study and how the examination is structured. The Assistant Central Intelligence Officer (ACIO) Grade II/Executive exam is different from many other competitive exams because the selection process does not end with an objective test. Candidates also have to clear a descriptive paper and face an interview.
The IB ACIO Syllabus 2026 covers Current Affairs, General Studies, Numerical Aptitude, Reasoning and English in Tier 1. Tier 2 focuses on essay writing, comprehension and long-answer questions, while the interview checks communication, awareness and overall suitability for the post.
Instead of trying to study everything at once, candidates should break the syllabus into smaller sections and prepare them consistently.
Overview of IB ACIO Syllabus 2026
| Particular | Details |
|---|---|
| Post | Assistant Central Intelligence Officer Grade II/Executive |
| Organisation | Intelligence Bureau |
| Exam Stages | Tier 1, Tier 2 and Interview |
| Tier 1 | Objective Type |
| Tier 1 Questions | 100 |
| Tier 1 Marks | 100 |
| Tier 1 Duration | 60 Minutes |
| Tier 2 | Descriptive Type |
| Tier 2 Marks | 50 |
| Tier 2 Duration | 60 Minutes |
| Interview | Personal Interview |
| Interview Marks | 100 |
| Negative Marking | 1/4 mark for each wrong answer in Tier 1 |
IB ACIO Exam Pattern 2026
Before jumping into the syllabus, it is important to understand the exam pattern. This helps candidates decide how much time to give to each subject during preparation.
The examination is divided into three stages:
- Tier 1 – Objective Examination
- Tier 2 – Descriptive Examination
- Tier 3 – Interview
IB ACIO Tier 1 Exam Pattern
Tier 1 consists of 100 questions carrying 100 marks. All five sections have equal weightage.
| Subject | Questions | Marks |
|---|---|---|
| Current Affairs | 20 | 20 |
| General Studies | 20 | 20 |
| Numerical Aptitude | 20 | 20 |
| Reasoning/Logical Aptitude | 20 | 20 |
| English Language | 20 | 20 |
| Total | 100 | 100 |
Time Duration: 60 Minutes
There is a negative marking of 1/4 mark for every incorrect answer.
A practical point to remember
You get only one hour for 100 questions. That means knowing the answer is not enough—you also need to know when to move on. Spending several minutes on one difficult puzzle or calculation can affect the entire paper.
IB ACIO Tier 2 Exam Pattern 2026
Tier 2 is a descriptive paper. This is where candidates have to put their thoughts into words instead of simply selecting an option.
| Section | Marks |
|---|---|
| Essay Writing | 20 |
| English Comprehension | 10 |
| Long Answer Questions | 20 |
| Total | 50 |
Duration: 60 Minutes
The long-answer questions can cover areas related to current affairs, economic issues and socio-political issues.
Preparation Tip: Do not wait until after Tier 1 to start writing practice. A few essays and descriptive answers every week can make a big difference later.
IB ACIO Tier 1 Syllabus 2026
The Tier 1 syllabus is divided into five sections:
- Current Affairs
- General Studies
- Numerical Aptitude
- Reasoning
- English Language
Let’s look at them one by one.
1. IB ACIO Current Affairs Syllabus 2026
Current Affairs is one of the most important areas of IB ACIO preparation. Its importance goes beyond Tier 1 because current issues can also become useful for essay writing, long-answer questions and interview discussions.
Candidates should regularly follow major national and international developments.
Important Current Affairs Topics
- National news
- International news
- Government schemes and policies
- Defence exercises
- Defence developments
- Important appointments
- Resignations
- Awards and honours
- Sports events
- Books and authors
- Summits and conferences
- Reports and indices
- Science and technology
- Space missions
- Environment and climate change
- Important days
- International organisations
- Economic developments
- Budget-related developments
- India and neighbouring countries
How to Prepare Current Affairs
Don’t try to memorise every headline you see.
Instead, make short notes covering:
What happened? Why is it important? Who is involved? What are the key facts?
This approach is especially helpful when the same current-affairs topic appears in a descriptive question later.
2. IB ACIO General Studies Syllabus 2026
General Studies has a wide syllabus, so leaving it for the last few weeks can create unnecessary pressure.
History
- Ancient India
- Medieval India
- Modern India
- Indian National Movement
- Freedom Struggle
- Important movements
- Important historical events
- Important personalities
Geography
- Physical Geography
- Indian Geography
- World Geography
- Rivers
- Mountains
- Climate
- Natural resources
- Agriculture
- Industries
- Environmental Geography
Indian Polity
- Indian Constitution
- Fundamental Rights
- Fundamental Duties
- Directive Principles
- Parliament
- Lok Sabha
- Rajya Sabha
- President
- Prime Minister
- Judiciary
- Supreme Court
- High Courts
- Constitutional bodies
- Important Articles
- Constitutional Amendments
- State Legislature
- Panchayati Raj
- Government policies and schemes
Economy
- Basic economic concepts
- Indian Economy
- Banking
- Inflation
- GDP
- Fiscal deficit
- Budget
- Economic Survey
- Taxation
- GST
- Poverty
- Unemployment
- Economic planning
- Major economic developments
Science and Technology
- Basic Physics
- Basic Chemistry
- Biology
- Human body
- Diseases
- Scientific discoveries
- Space research
- Defence technology
- Computer and IT
- Recent innovations
Static GK
- National Parks
- Wildlife Sanctuaries
- Important dams
- Rivers
- Countries and capitals
- Currencies
- International organisations
- Headquarters
- Books and authors
- Important dates and events
Important: General Studies is broad. Make short revision notes as you complete each topic so that revision does not become difficult at the end.
3. IB ACIO Numerical Aptitude Syllabus 2026
The Numerical Aptitude section tests both mathematical understanding and speed.
Important Topics
- Number System
- Simplification
- Approximation
- LCM and HCF
- Percentage
- Average
- Ratio and Proportion
- Profit and Loss
- Discount
- Simple Interest
- Compound Interest
- Time and Work
- Pipes and Cisterns
- Time, Speed and Distance
- Boats and Streams
- Partnership
- Mixture and Alligation
- Problems on Ages
- Algebra
- Number Series
- Missing Numbers
- Fractions and Decimals
- Geometry
- Mensuration
- Statistics
- Data Interpretation
- Tables and Graphs
- Data Sufficiency
Some of the provided syllabus material also mentions advanced areas such as calculus, analytical geometry, differential equations, differential geometry, dynamics, real analysis and linear programming. Candidates should check the applicable recruitment notification when finalising the level of preparation required for these topics.
Maths Preparation Tip
Don’t just read formulas. Solve questions with a timer.
For example, after learning percentages, immediately solve a set of percentage, profit-loss and discount questions. This helps turn formulas into usable concepts.
4. IB ACIO Reasoning Syllabus 2026
Reasoning can become much easier once you get familiar with the question patterns. Regular practice is more useful here than simply reading theory.
Important Topics
- Analogy
- Classification
- Coding-Decoding
- Blood Relations
- Direction Sense
- Alphanumeric Series
- Number Series
- Ranking and Ordering
- Syllogism
- Venn Diagrams
- Cause and Effect
- Statement and Assumption
- Statement and Conclusion
- Puzzles
- Seating Arrangement
- Data Sufficiency
- Input-Output
- Decision Making
- Calendar
- Clock
- Missing Number
- Odd One Out
- Artificial Language
- Pattern Completion
- Verbal Reasoning
- Non-Verbal Reasoning
- Image Analysis
- Logical Sequence
Exam Tip
In a timed paper, don’t let one difficult puzzle consume your attention. Finish the questions you can solve quickly and return to lengthy problems later.
5. IB ACIO English Language Syllabus 2026
English tests a combination of grammar, vocabulary and comprehension.
Grammar Topics
- Parts of Speech
- Nouns
- Pronouns
- Adjectives
- Verbs
- Adverbs
- Articles
- Prepositions
- Conjunctions
- Tenses
- Subject-Verb Agreement
- Active and Passive Voice
- Direct and Indirect Speech
- Clauses
- Sentence Structure
- Error Detection
- Sentence Improvement
Vocabulary Topics
- Synonyms
- Antonyms
- One Word Substitution
- Idioms and Phrases
- Phrasal Verbs
- Spellings
- Misspelled Words
- Vocabulary Usage
Comprehension and Other Topics
- Reading Comprehension
- Cloze Test
- Fill in the Blanks
- Sentence Rearrangement
- Para Jumbles
- Verbal Comprehension
- Paragraph Completion
English Preparation Tip
Reading regularly is one of the simplest ways to improve English. Read a good article or editorial every day and note down unfamiliar words. More importantly, try using those words in your own sentences.
IB ACIO Tier 2 Syllabus 2026
Tier 2 requires a completely different approach from Tier 1.
Here, the examiner wants to see whether you can understand an issue, organise your thoughts and express them clearly.
Essay Writing
The essay section carries 20 marks.
Possible areas include:
- National Security
- Internal Security
- Cyber Security
- Artificial Intelligence
- Technology
- Education
- Women Empowerment
- Climate Change
- Economy
- Governance
- Social Issues
- Government Policies
- International Relations
Simple Essay Structure
A well-organised essay can follow this format:
Introduction → Main Points → Examples → Challenges → Solutions/Way Forward → Conclusion
Keep the language simple. Clear writing is more useful than using complicated vocabulary.
English Comprehension
This section tests your ability to understand and interpret a passage.
Questions may focus on:
- Main idea
- Important facts
- Inference
- Meaning of words
- Context
- Author’s viewpoint
- Passage-based information
Tip: Read the passage carefully and answer according to the information given. Avoid adding personal opinions when the question is asking specifically about the passage.
Long Answer Questions
The long-answer section can cover:
- Current Affairs
- Economy
- Socio-political issues
- Governance
- Security
- Technology
- Major national developments
Current Affairs preparation becomes particularly useful here. If you understand an issue instead of merely memorising facts, writing a good answer becomes much easier.
IB ACIO Interview Syllabus 2026
The interview is the final stage of the selection process.
There isn’t a fixed chapter-wise syllabus for the interview. Candidates should instead prepare around areas that can help them discuss themselves and current issues confidently.
Important Areas for Interview Preparation
- Current Affairs
- National and international developments
- Internal security
- Cyber security
- Defence and security developments
- India’s neighbourhood
- International relations
- Government policies
- Educational background
- Graduation subject
- Hobbies and interests
- General awareness
- Situational questions
Interview Tip
Don’t try to memorise prepared answers for every possible question. Understand the issues and practise explaining your thoughts clearly and calmly.
How to Prepare for IB ACIO 2026?
A realistic preparation plan is more useful than studying for long hours without a clear direction.
Start With the Basics
First, complete the fundamentals of Maths, Reasoning and English. At the same time, begin History, Geography, Polity, Economy and Science.
Make Current Affairs a Daily Habit
Even 30–45 minutes of focused current-affairs preparation every day is better than trying to cover several months of news in a few days.
Practise Questions Every Day
After completing a topic, solve questions from that topic. This tells you whether you have actually understood the concept.
Start Descriptive Writing Early
Write at least two essays every week. Pick topics from current affairs and practise completing them within a fixed time.
Analyse Mock Tests
Don’t just look at your score.
After every mock, ask:
- Which questions did I get wrong?
- Was the mistake conceptual or careless?
- Where did I lose time?
- Which section took too long?
- Which topics need another revision?
That analysis is often more valuable than simply taking another mock.
90-Day IB ACIO Preparation Plan
First 30 Days
Focus on building the foundation.
- Complete basic Maths
- Cover important Reasoning topics
- Revise English grammar
- Start Current Affairs
- Cover History and Geography
- Begin Polity
- Prepare short notes
Days 31–60
Move towards intensive practice.
- Complete Economy and Science
- Solve topic-wise questions
- Start sectional tests
- Revise Current Affairs
- Practise comprehension
- Write regular essays
- Start previous-year question practice
Days 61–90
The final phase should focus on revision and exam practice.
- Take full-length mocks
- Analyse mistakes
- Revise short notes
- Strengthen weak topics
- Practise descriptive answers
- Revise important Current Affairs
- Improve speed and accuracy
Common Mistakes Candidates Should Avoid
Waiting for Tier 1 to Finish Before Starting Tier 2
This is one of the easiest mistakes to avoid. Writing skills take time to develop, so descriptive practice should begin early.
Reading Current Affairs Without Revision
Simply reading news every day is not enough. Revise important events regularly.
Ignoring General Studies
GS is a large section, and completing it at the last minute can become difficult.
Taking Mocks Without Analysis
A mock test should show you where you are losing marks and time. Always spend some time analysing your performance.
Trying to Study Everything
The syllabus is broad. Prioritise important topics, practise regularly and revise what you have already studied.
Infusion Notes Team
The Infusion Notes team consists of 20 educators who regularly share educational content in the blog section, including current affairs, previous year papers, and other study materials for you.
