Published on September 23, 2025 by Planet E

Introduction

Great news for all aspirants — the IB ACIO Answer Key 2025 has been released by the Ministry of Home Affairs (MHA). If you appeared for the Assistant Central Intelligence Officer (ACIO) Grade II / Executive Tier-1 exam, this is your chance to download the response sheet, estimate your score, and raise objections if needed. Planet E brings you the full breakdown so you can stay ahead.

What is the IB ACIO Answer Key 2025?

The IB ACIO Answer Key 2025 is a provisional key released by MHA that contains correct answers to all the Tier-1 questions from the ACIO exam held on 16, 17, and 18 September 2025. Along with this, the response sheet (showing your attempted answers) is also made available for candidates to cross-check their responses.

Key Dates & Details

How to Download the IB ACIO Answer Key 2025

1. Visit the official website of the Ministry of Home Affairs (mha.gov.in).

2. Find the “What’s New” section on the homepage.

3. Click on the link labelled “IB ACIO Answer Key 2025 (Tier-1)”.

4. Log in using your Registration ID and Date of Birth (or Password, as applicable).

5. Download the answer key and your response sheet and save it for future reference.

How to Calculate Your Score

To estimate your marks using the provisional answer key:

• Each correct answer = +1 mark

• Each wrong answer = −0.25 mark

• No response = 0 marks

Example: If you answered 70 questions correctly and 20 incorrectly, your estimated score =
70 − (20 × 0.25) = 65 marks.

What to Do If You Find a Discrepancy (Objection Process)

If you believe there’s an error in the answer key or in any question/response:

1. Log in at mha.gov.in using your credentials.

2. Locate the “Objection Link” related to IB ACIO Answer Key 2025.

3. Select the question(s) you want to challenge and provide valid supporting evidence.

4. Submit your objection and, if required, pay a nominal fee.

Make sure you raise your objections within the given window (22-25 September 2025). After that, the final answer key will be published.

What’s Next After the Answer Key?

Once the objection period ends and the final answer key is released:

• MHA will declare IB ACIO Result 2025 for Tier 1.

• Candidates clearing Tier 1 will move to the Tier 2 exam, which is descriptive (essay & comprehension).

• After Tier 2, there will be an Interview round. Final selections are based on performance across all stages.

Tips from Planet E to Make the Most of the Answer Key

• Check responses carefully: Compare your attempt sheet with the official one to identify errors or missed answers.

• Time your objections: Don’t wait for the last day; server issues or other glitches might create hurdles.

• Keep proof ready: If challenging an answer, prepare credible sources or evidence to support your claim.

• Estimate cutoff early: Based on past years and your calculated marks, you can forecast whether you’re likely to qualify and plan your Tier 2 preparation accordingly.

Why the IB ACIO 2025 Answer Key Matters

• It gives you an early insight into how you performed before the official result.

• Helps reduce anxiety by estimating your score and understanding mistakes.

• Provides a fair chance to challenge discrepancies and ensure accurate evaluation.

Conclusion

For IB ACIO aspirants of 2025, this answer key release is a crucial milestone. Planet E recommends downloading your response sheet immediately, carefully calculating your provisional score, and acting quickly if you spot any discrepancies. Stay calm, stay confident, and use this as your stepping stone for the next stage (Tier 2 + Interview).

All the best from Planet E — your partner in exam success!