ISRO Assistant & UDC Final Answer Key 2026 Out - Download Link

The ISRO Assistant & UDC Final Answer Key 2026 has been officially released by the ISRO Centralised Recruitment Board (ICRB) on 28 October 2026. Candidates who appeared for the written test held on 21 September 2026 for the posts of Assistant, Upper Division Clerk (UDC), Junior Personal Assistant (JPA), and Stenographer can now verify their responses against the official Answer Key 2026 through the candidate login page. This final Solution Key marks a critical step in the recruitment process, as it follows the initial provisional answer key and allows candidates to compare every marked answer with the officially released responses. With the Skill Test scheduled for 1 November 2026, applicants must act quickly to review their scores, estimate their performance, and prepare for the next stage. Read this comprehensive guide to access the direct download link, calculate your marks using the official marking scheme, understand the qualifying criteria, and learn what comes after the final answer key release.

ISRO Final Answer Key 2026 - Quick Overview

Direct Download Link - ISRO Assistant and UDC Final Answer Key 2026

Candidates can access the official final answer key for all posts through the links below. The answer key login page is hosted on the ISRO E-Forms portal and requires your registration credentials.

Direct Link to Check ISRO Assistant and UDC Final Answer Key 2026

ISRO Careers Page - Official Updates

How to Download ISRO Assistant & UDC Final Answer Key 2026

Follow these simple steps to access and download the official ISRO Answer Key 2026:

1. Open the Answer Key login page from the Direct Download Link section above.
2. Enter the requested login credentials on the page (such as your application number and date of birth or password).
3. After successful login, open your response sheet and the final answer key displayed on the screen.
4. Compare each of your marked answers with the officially released Solution Key 2026.
5. Save or print the page for your records and score estimation before the skill test.

How to Calculate Your ISRO Written Test Score Using the Final Answer Key

The ISRO written test carries negative marking. Use the following formula to calculate your estimated score based on the Answer Key 2026:

Score = (Number of correct answers × 1) − (Number of wrong answers × 0.25)

Key points about the marking scheme:

• +1 mark is awarded for every correct answer.
• -0.25 marks (negative marking) is deducted for every wrong answer.
• Unattempted questions carry no marks – neither positive nor negative.

Example: If you answered 150 questions correctly and 30 incorrectly out of 200, your score would be: (150 × 1) − (30 × 0.25) = 150 − 7.5 = 142.5 marks out of 200.

ISRO Written Test Pattern 2026 - Section-wise Breakdown

Qualifying Marks in the ISRO Written Test 2026

• Unreserved (UR): 50% marks in each part/section
• Reserved categories (SC/ST/OBC/PwBD): 40% marks in each part/section

Objection / Challenge Process for ISRO Final Answer Key 2026

The final answer key is considered the conclusive version of the solution key for the ISRO Assistant, UDC, JPA and Stenographer written test. Typically, ISRO provides an opportunity to raise objections against a provisional answer key before releasing the final answer key. Since the source material confirms the final answer key release on 28 October 2026 without mentioning any pending objection window for this version, candidates should note the following:

• The final answer key is generally not subject to further objections as it has been published after all reviewed grievances.
• Any corrections or disputes should have been raised during the provisional answer key objection period.
• Candidates with genuine concerns regarding discrepancies should refer to the ISRO Careers official page for any subsequent updates.

What's Next? Post-Answer Key Process for ISRO Recruitment 2026

After the release of the ISRO Final Answer Key 2026, the recruitment moves into the next phases:

1. Shortlisting for the Skill Test

Candidates are shortlisted based on their written test performance in a ratio of up to 1:5 against category-wise vacancies, with a minimum of 10 candidates per post group.

2. Skill Test Details

3. Final Selection

The final merit list is prepared based on written test marks, from among candidates who qualify in the skill test. The Skill Test is scheduled for 1 November 2026.

4. Tie-Breaker Rules

• Assistant/UDC: The candidate with higher marks in General Intelligence & Reasoning gets preference.
• JPA/Stenographer: The candidate with higher marks in English Language & Comprehension gets preference.
• If still tied: the older candidate ranks higher in the final merit list.

ISRO Recruitment 2026 - Complete Important Dates

ISRO Assistant & UDC Vacancy 2026 - Post-wise Details

Eligibility Criteria for ISRO Assistant, UDC, JPA & Stenographer 2026

Note: Conversion of CGPA into percentage is not permitted when checking eligibility.

Age Limit for ISRO Recruitment 2026

The minimum age is 18 years. Age is counted as on the application closing date (20 August 2026).

Application Fee and Refund Policy

• ₹500 for Assistant/UDC posts.
• ₹500 for JPA/Stenographer posts.
• ₹1,000 if applying for both categories.
• Women, SC, ST, PwBD and Ex-Servicemen candidates who appear in the written test are eligible for a full refund.
• Other candidates who appear in the written test receive a partial refund of ₹400.
• No refund is considered for candidates who do not appear in the written test.

Important Instructions for ISRO Candidates

• Only Indian nationals can apply.
• Selected candidates can be posted to any ISRO/Department of Space centre or unit and may be transferred.
• No travel allowance is paid for the written test.
• Candidates attending the skill test are reimbursed to-and-fro second-class train fare.
• Canvassing in any form leads to disqualification.
• Do not trust fake offers of appointment in ISRO.

ISRO Assistant and UDC Final Answer Key 2026 - Important Links

Frequently Asked Questions (FAQs) - ISRO Assistant & UDC Final Answer Key 2026

Q1. When was the ISRO Assistant & UDC Final Answer Key 2026 released?

The ISRO Final Answer Key 2026 for Assistant, UDC, JPA and Stenographer posts was released on 28 October 2026 through the candidate login page on the ISRO E-Forms portal.

Q2. How can I download the ISRO Assistant & UDC Answer Key 2026?

Candidates can download the Answer Key 2026 by visiting the official answer key login page, entering their registration credentials, and opening the response sheet alongside the final answer key. A direct link is provided in this article.

Q3. What is the marking scheme for the ISRO written test 2026?

The ISRO written test has +1 mark for each correct answer and -0.25 marks (negative marking) for each wrong answer. Unattempted questions carry no marks. The total test is of 200 questions and 200 marks.

Q4. What are the qualifying marks for the ISRO written test?

Unreserved (UR) candidates must score at least 50% in each section, while reserved category candidates (SC/ST/OBC/PwBD) must score at least 40% in each section to qualify.

Q5. Can I raise objections against the ISRO Final Answer Key 2026?

The final answer key is generally not subject to further objections. Any discrepancies should have been raised during the provisional answer key objection period. Candidates should check the official ISRO Careers page for any updates.

Q6. When is the ISRO Skill Test 2026 scheduled?

The ISRO Skill Test 2026 for all shortlisted candidates is scheduled for 1 November 2026. The computer literacy test applies to Assistant/UDC, while the stenography test applies to JPA/Stenographer posts.

Q7. How is the final selection made after the skill test?

Final selection is based on written test marks, from among candidates who qualify in the skill test. Candidates are shortlisted for the skill test in a ratio of up to 1:5 against category-wise vacancies, with a minimum of 10 candidates per post group.

Q8. What happens if two candidates score the same marks in the ISRO written test?

For Assistant/UDC posts, the tie-breaker is higher marks in General Intelligence & Reasoning. For JPA/Stenographer, it is higher marks in English Language & Comprehension. If the tie persists, the older candidate gets the higher rank.