How is UPSC Prelims score calculated — does UPSC use normalisation, and when are individual marks disclosed?

The mechanics of UPSC Prelims scoring contain several details that aspirants misunderstand, and those misunderstandings lead to suboptimal in-exam decisions — particularly around negative marking and the normalisation question.

Exact marking formula:

GS Paper I (General Studies) has 100 questions, each carrying 2 marks, for a total of 200 marks. The negative marking deduction is exactly one-third of the question's marks — for a 2-mark question, the deduction is 2/3 = 0.6667 marks (typically displayed as 0.66 or 0.667 in coaching analyses). There is no deduction for unattempted questions. An unattempted question scores exactly zero.

GS Paper II (CSAT) has 80 questions, each carrying 2.5 marks, for a total of 200 marks. The same one-third deduction applies: wrong CSAT answer costs 2.5/3 = 0.833 marks. However, CSAT is qualifying in nature — you must score at least 33% (66 marks out of 200) to have your GS Paper I score count. CSAT marks are NOT added to GS Paper I for cut-off determination.

A worked example: Candidate answers 72 questions correctly, 18 incorrectly, and leaves 10 unattempted in GS Paper I.

• Correct: 72 × 2 = 144.00 marks
• Wrong: 18 × 0.667 = 12.00 marks deducted
• Unattempted: 10 × 0 = 0
• Total score = 144.00 − 12.00 = 132.00 marks

Does UPSC use normalisation for Prelims?

No. Normalisation is applied in examinations where multiple shifts or sessions exist (like UPSC's other exams, or SSC/CAT). For UPSC CSE Prelims, GS Paper I is conducted in a single morning session (9:30-11:30 AM) and CSAT in a single afternoon session (2:30-4:30 PM). All candidates sit the same question paper in the same slot on the same day. There is no inter-shift difficulty variance to correct for, so no normalisation is applied. This is confirmed by the UPSC exam pattern documentation and FAQ (upsconline.nic.in/ngrp/assets/PDF/Faq.pdf). Your raw score, after deducting for wrong answers, is your Prelims score.

Note: UPSC does print question papers in multiple series (Series A, B, C, D) with the same questions in different orders. The answer key is series-specific, but each series carries identical questions — so no normalisation is required between series either.

When are individual marks disclosed?

This is a frequently misunderstood point with a nuanced policy. UPSC's longstanding practice is to disclose Prelims marks only after the entire CSE examination cycle — Prelims, Mains, and Interview — is completed and the final result is declared. This typically means Prelims marks become available approximately 12-15 months after Prelims itself. Candidates who clear Prelims but do not make it past Mains can see their Prelims marks after the final result; candidates who do not clear Prelims cannot individually obtain their Prelims marks through RTI (this position has been upheld in RTI rulings).

However, there is an important 2026 reform to note: Starting with CSE Prelims 2026 (May 24, 2026), UPSC will release a provisional answer key shortly after the Preliminary Examination. This follows a Supreme Court-backed reform (Justices P. S. Narasimha and A. S. Chandurkar approved the plan). Candidates can file objections to the provisional key through an online portal, citing authoritative sources. UPSC will then release the final answer key incorporating any accepted corrections. This does not change when individual scores are disclosed — only the answer key is released early, not individual candidate scores. The reform means candidates can calculate their own approximate score soon after the exam, but official marks remain withheld until the cycle ends.

Question-wise marks (i.e., UPSC publishing which answers it accepted for each question) are available through the official answer key publication, which has historically been released on upsc.gov.in after the Mains examination. The 2026 provisional key reform moves this earlier in the cycle.