IB ACIO Syllabus & Exam Pattern 2025, Check Tier 1 & Tier 2 Subject Wise Topics in Detail

The IB ACIO Syllabus & Exam Pattern 2025 has been designed to evaluate candidates’ aptitude, analytical skills, and writing ability across two tiers- Tier 1 and Tier 2. Tier 1 is an objective-type test comprising multiple subjects, while Tier 2 is descriptive in nature. Understanding the latest exam pattern and subject-wise syllabus is crucial for strategic preparation. Candidates aiming to join the Intelligence Bureau as ACIOs must be well-versed in all sections to perform efficiently in the selection process.

IB ACIO Syllabus and Exam Pattern 2025

The IB ACIO Notification 2025 selection process consists of three stages Tier-I (objective), Tier-II (descriptive), and a Personal Interview. Each stage assesses different skills, and the syllabus and exam pattern vary accordingly. To succeed in the exam, candidates must understand the structure of all tiers, focus on key topics, and plan their preparation strategically. In this article, we have provided the complete section-wise IB ACIO syllabus for Tier-I and Tier-II, along with details of the interview process, to help you prepare effectively for every stage.

IB ACIO Syllabus 2025: Overview

Check out the table below to get more information on IB ACIO Syllabus 2025. This IB ACIO Syllabus 2025 Overview includes all the content in a short format.

IB ACIO Exam Pattern 2025

Candidates who have applied for the IB ACIO Recruitment should be completely aware of the IB ACIO Exam Pattern 2025. For your convenience, we have attached the IB ACIO Exam Pattern 2025 in this section. This will make you get enlightened about the selection process set by the organisation.

IB ACIO Tier I Exam Pattern 2025

The IB ACIO Tier I Exam is divided into five parts: Current Affairs, General Awareness, Quantitative Aptitude, Reasoning, and English Language. The detailed exam pattern is given in the table below.

IB ACIO Tier II Exam Pattern 2025

The Tier II Exam for Intelligence Bureau ACIO will be Descriptive Type. The time period for the complete IB ACIO Tier II Exam 2025 is 1 Hour.

IB ACIO Tier III Personal Interview

The Tier‑3 stage of the IB ACIO selection process is a face-to-face personal interview conducted to assess the overall suitability of the candidate for the role of Assistant Central Intelligence Officer. This stage holds significant importance, as it goes beyond academics and tests the candidate’s mental alertness, presence of mind, and awareness of national security issues.

IB ACIO Syllabus 2025

To perform well in the IB ACIO 2025 Exam, candidates need a clear grasp of the core subjects covered in the objective paper. The Tier-I exam is just to test a candidate’s awareness, analytical thinking, and problem-solving skills across five key areas: Current Affairs, General Studies, Quantitative Aptitude, Reasoning Ability, and English Language. In the following section, we break down each subject to help you focus on what truly matters for scoring high.

Current Affairs Syllabus

• National News
• International News
• New Schemes
• Eminent Personalities
• Financial Schemes
• Nobel Prize Winners
• Awards.

General Studies Syllabus

• Polity and the Indian Constitution
• Indian history
• Science and Technology
• Geography
• Physics
• Biology
• Chemistry
• Economics and Finance
• Computer Science
• Current Affairs
• Static GK

Numerical Aptitude Syllabus

• Ratios
• Missing Numbers
• Age
• Time and Work
• Volume
• LCM and HCF
• Percentage
• Factoring
• Profit and Loss
• Simple and Compound Interest
• Time and Distance
• Average
• Fractions
• Mensuration
• Prices and Expenditure Problems
• Series Completion
• Real Analysis
• Essential Mathematics
• Computation of Whole Numbers
• Analytical Geometry
• Prices and Expenditure Problems
• Operations Research & Linear Programming
• Calculus
• Fundamental Arithmetical Operations

Reasoning / Logical Aptitude  Syllabus

• Seating Arrangement
• Puzzles
• Syllogism
• Blood Relations
• Input-Output
• Order and Ranking
• Calendars and Clocks
• Inequalities
• Alphanumeric Series
• Data Sufficiency
• Coding-Decoding
• Distance and Direction
• Verbal and Non Verbal Reasoning
• Cause and Effect
• Odd One Out
• Charts
• Cause and Effect
• Character Puzzles
• Classifications
• Logical Sequence of Words
• Completion of Patterns
• Decision Making
• Image Analysis

English Syllabus

• Idioms and Phrases
• Verbs
• Fill in the blanks
• Spellings
• Grammar
• Adjectives
• Fill in the blanks
• Spellings
• Grammar
• Synonyms/Antonyms
• Verbal Comprehension Passage
• Spot the error
• Verbs
• Sentence Structure
• Vocabulary
• Detecting misspelled words
• Clauses
• Passage
• Improvement
• One-word substitution

IB ACIO Tier II Syllabus

Below we have discussed the IB ACIO Tier II Syllabus.

IB ACIO Selection Process

The selection process for IB ACIO 2025 is conducted in three stages Tier I, Tier II, and the Interview. Tier I is an objective-type exam comprising 100 multiple-choice questions designed to assess a candidate’s general awareness, reasoning ability, quantitative aptitude, and English language skills. Those who qualify move on to Tier II, a descriptive paper that evaluates writing and comprehension abilities, with a minimum qualifying mark of 33%. The final stage, Tier III, is the personal interview, where candidates are assessed on their personality, communication skills, and overall suitability for the role.

Preparation Tips for the IB ACIO Tier 1 Exam

To crack the Tier 1 exam, candidates need a smart and focused preparation strategy that covers all subjects within the stipulated time frame. Here are a few useful tips:

Understand the Syllabus Thoroughly: Make sure you are familiar with the latest syllabus and exam pattern to prioritize important topics.

Create a Timed Study Plan: Allocate fixed hours daily for each section like reasoning, general awareness, and quantitative aptitude.

Practice Mock Tests & Previous Year Papers: Regular practice helps improve speed, accuracy, and confidence.

Stay Updated with Current Affairs: Read newspapers and monthly current affairs magazines, especially related to national security and intelligence.

Focus on Weak Areas: Identify and devote extra time to the sections you struggle with the most to improve your overall score.