UPSC Prelims Provisional Answer Key 2026 Released: Download GS Paper 1 & CSAT PDFs

The UPSC has officially released the Provisional Answer Key 2026 for the Civil Services Preliminary Examination on its official website, upsc.gov.in. Candidates who appeared for the examination can now access the answer keys for both General Studies Paper 1 and CSAT Paper 2 to evaluate their performance and estimate their probable scores.

The UPSC Prelims 2026 examination was conducted on May 24, 2026. GS Paper 1 was held during the morning session, while CSAT Paper 2 took place in the afternoon session. With the release of the provisional answer key, aspirants can verify their responses, calculate expected marks, and assess their likelihood of qualifying for the UPSC Mains Examination 2026.

UPSC Prelims Answer Key 2026 Available

The release of the UPSC Prelims Provisional Answer Key 2026 is highly significant for candidates as it enables them to analyse their performance soon after the examination. By matching their responses with the official answers, aspirants can estimate their scores and prepare accordingly for the next stage of the selection process.

The answer key PDFs for both GS Paper 1 and CSAT are now available on the official UPSC portal. Candidates can download the set-wise PDFs and review the correct responses in detail.

UPSC GS Paper 1 Answer Key 2026

The General Studies Paper 1 answer key is particularly important because marks obtained in this paper determine whether a candidate qualifies for the Mains Examination. Candidates can use the provisional key to estimate their scores and identify any discrepancies, if present.

UPSC has also provided an opportunity for candidates to raise objections against any answer they believe to be incorrect once the objection portal is activated.

UPSC GS Paper 1 Answer Key PDF

UPSC CSAT Answer Key 2026

The CSAT paper is qualifying in nature and tests candidates on areas such as comprehension, logical reasoning, analytical ability, decision-making, basic numeracy, and data interpretation. To clear CSAT, candidates must secure at least 33% marks.

Candidates can now access the official CSAT Provisional Answer Key 2026 through the UPSC website and check their performance.

UPSC CSAT Answer Key PDF

UPSC Prelims 2026 Marking Scheme

UPSC follows a fixed marking pattern in the Preliminary Examination. Candidates can calculate their expected scores using the official marking scheme along with the answer key.

How to Calculate UPSC Prelims Score 2026

Candidates can estimate their probable score by comparing their responses with the official answer key and applying the prescribed marking scheme.

Steps to Calculate Score

Step 1: Download the set-wise UPSC Prelims Answer Key 2026 for both GS Paper 1 and CSAT Paper 2.

Step 2: Count the number of correct answers separately for each paper.

Step 3: Identify the total number of incorrect responses to account for negative marking.

Step 4: For GS Paper 1, award 2 marks for every correct answer and deduct 0.667 marks for every incorrect answer.

Step 5: For CSAT Paper 2, add 2.5 marks for each correct response and subtract 0.833 marks for every wrong answer.

Step 6: Ignore unattempted questions since no marks are deducted for them.

Step 7: Apply the formula below to estimate the final score:

Estimated Score = (Correct Answers × Marks per Question) − (Incorrect Answers × Negative Marks)

Steps to Download UPSC Prelims Answer Key 2026

Candidates can follow the steps below to access the official answer key from the UPSC website:

1. Visit the official UPSC website at upsc.gov.in.
2. Click on the “Examinations” section available on the homepage.
3. Select the “Answer Keys” option from the dropdown menu.
4. Locate the link titled “UPSC Prelims Answer Key 2026.”
5. Open the PDF link for either GS Paper 1 or CSAT Paper 2.
6. The answer key PDF will appear in a new tab.
7. Download and save the file for future reference.

UPSC Prelims 2026 Objection Window

UPSC has introduced a notable change this year by releasing the provisional answer key shortly after the examination. Candidates who identify any doubtful or incorrect answer can submit objections through the official online portal.

To raise objections, candidates must provide three authentic supporting references from credible sources such as NCERT books, standard textbooks, or official documents.

How to Raise Objections Against UPSC Prelims Answer Key 2026

Candidates can follow these steps to submit objections regarding any disputed answer:

1. Visit the UPSC online portal and open the QPRep section available at upsconline.nic.in.
2. Enter the required details such as question paper set and question number.
3. Upload three supporting documents from reliable academic or official sources.
4. Verify all details carefully before final submission.
5. UPSC subject experts will examine the representations, and approved corrections will be reflected in the final answer key.

Importance of UPSC Prelims Answer Key 2026

The UPSC Prelims Answer Key 2026 serves as an essential tool for candidates to assess their performance before the official result is declared.

Key Benefits

• Score Estimation: Helps candidates calculate probable marks using the official marking scheme.
• Performance Evaluation: Enables analysis of strengths and weaknesses across different subjects.
• Qualification Assessment: Assists aspirants in estimating their chances of clearing the prelims cutoff.
• Error Identification: Helps candidates understand mistakes and improve conceptual clarity.
• Mains Preparation: Candidates likely to qualify can begin Mains preparation immediately without waiting for results.
• Exam Pattern Analysis: Provides insight into the latest trends, difficulty level, and important topics asked in the exam.
• Improved Strategy: Assists future aspirants in refining accuracy, time management, and preparation techniques.
• CSAT Qualification Check: Helps candidates determine whether they have secured the minimum qualifying marks in CSAT.
• Reduced Uncertainty: Gives aspirants a clearer understanding of their performance, reducing anxiety before the declaration of results.