⚡ TL;DR

The verified topper split is roughly 50% on static GS (History, Polity, Geography, Economy, Environment), 25–30% on Optional (your 500-mark rank-decider), and 20–25% on Current Affairs + Newspaper + Revision. In a 10-hour day that is ~5 hrs GS, ~2.5 hrs Optional, ~2.5 hrs CA + revision. The Optional share rises in the 90 days before Mains; the CA share rises in the 30 days before Prelims.

Why the split matters more than the total

Two aspirants both study 10 hours. Aspirant A does 9 hours of optional and 1 hour of current affairs. Aspirant B does 5 hrs GS + 2.5 hrs Optional + 2.5 hrs CA. Aspirant B will outscore A by 100+ marks. The split is the strategy; the total is just the input.

The verified baseline split (Phase: foundation, months 0–12)

Subject bucket% of daily study10-hr day6-hr day (working)
Static GS (History, Polity, Geography, Economy, Environment, S&T)50%5 hrs3 hrs
Optional (your 500-mark paper)25–30%2.5–3 hrs1.5 hrs
Current Affairs + Newspaper + Revision20–25%2 hrs1 hr
Answer writing (folded into above)(parallel)(in GS/Optional time)(weekend)

This matches widely published topper guidance and aligns with the Mains marks weightage — GS papers 1–4 total 1000 marks, Optional papers 1+2 total 500 marks, Essay 250 marks. Time allocation roughly mirrors marks allocation, with a slight overweight on Optional because it is your rank-decider.

The strategic case for the Optional weighting

The Optional subject is worth 500 marks (Papers 6 & 7). Across recent Mains, top 50 candidates routinely score 300+ in their Optional while average final-list candidates score 250–280. That 50-mark differential is larger than any other single lever in the exam. Hence the rule: every day of prep, the Optional gets touched. No 'I'll catch up on the weekend' for Optional.

How the split shifts with phase

Months 0–6 (Foundation)

  • GS: 55% (NCERTs + standard books, building base)
  • Optional: 25% (begin syllabus, no rush)
  • CA: 20% (build newspaper habit, no heavy CA materials yet)

Months 6–12 (Build)

  • GS: 45% (revision + depth on standard books)
  • Optional: 30% (deep theory, paper 2 also starts)
  • CA: 25% (monthly CA compilations begin)

Months 12–14 (Prelims sprint, last 60–90 days)

  • GS Prelims-focused: 60% (MCQ-heavy, PYQ, Environment, Polity revision)
  • Optional: 10% (maintenance only, no new content)
  • CA: 25%
  • Mock tests: 5% (1 full-length every alternate day in last 30)

Months 14–18 (Mains sprint, post-Prelims 90 days)

  • GS Mains: 40% (answer writing daily)
  • Optional: 40% (heavy answer writing, paper 1 + paper 2)
  • Essay practice: 10%
  • CA + revision: 10%

Months 18–20 (Interview)

  • DAF anchoring: 40%
  • CA + interview-relevant topics: 40%
  • Mock interviews: 20%

A worked sample 10-hour day (foundation phase)

TimeBlockSubjectDuration
06:00–08:00Deep work 1Polity (GS)2 hr
08:00–09:00Newspaper + breakfastCA1 hr
09:00–11:00Deep work 2Optional Paper 12 hr
11:00–12:30GS rotationModern History1.5 hr
12:30–14:00Lunch + nap
14:00–15:30Optional Paper 2Optional1.5 hr
15:30–17:00GS rotationGeography1.5 hr
17:00–18:00Exercise + tea
18:00–19:30Answer writing3 GS answers1.5 hr
19:30–20:30Dinner
20:30–22:00CA + revisionRevision of today1.5 hr
22:30Sleep

Totals: GS = 6.5 hrs (with answer writing); Optional = 3.5 hrs; CA = 2.5 hrs.

What recent toppers actually allocated

  • Shruti Sharma (AIR 1, CSE 2021) — Set content targets per subject, not hour targets. Roughly 50/30/20 GS/Optional/CA in foundation.
  • Saumya Sharma (AIR 9, CSE 2017) — 16–17 hours/day at peak; her Optional (Law) got ~4 hrs daily because of strong scoring; GS ~7 hrs; CA + answer practice ~5 hrs.
  • Anu Kumari (AIR 2, CSE 2017) — 10–12 hrs/day; Sociology optional got dedicated 3+ hrs daily; rest split GS/CA roughly 60/40.
  • Aditya Srivastava (AIR 1, CSE 2023) — Mains-phase morning slot was exclusively answer writing (10–15 answers a day, 70–110 min per answer). GS theory revision in afternoons. Optional in evenings.

Notice the constant: Optional never falls below ~2.5 hrs/day across all four toppers. This is the load-bearing wall.

Common splits that destroy attempts

Bad splitWhat happens
80% GS, 10% Optional, 10% CACross Prelims, score 220 in Optional, fail Mains cutoff
60% Optional, 20% GS, 20% CAMiss Prelims by 4 marks (Optional doesn't appear in Prelims)
40% CA, 30% GS, 30% OptionalInformation overload, weak fundamentals, anxiety spiral
100% GS, no Optional touched for 30 daysOptional decay measurable in mock answer scores within 2 weeks
Skipping newspaper for a week 'to focus on GS'Re-establishing the habit costs 3 weeks

Worked scenario — Prelims 2026 is in 9 days; should you still touch Optional?

It is May 15, 2026. Prelims is May 24 — 9 days. The instinct is to drop Optional entirely. Adjustment:

  • Drop Optional Paper 2 entirely for 9 days.
  • Keep 30 minutes/day of Optional Paper 1 only on its most overlapping topics with GS (PSIR has heavy GS-Polity overlap; History has heavy GS-1 overlap; Geography has heavy GS-1 + GS-3 overlap).
  • All other time → Prelims-mode: MCQs, PYQ, revision of CSAT.

This preserves Optional muscle without sacrificing the immediate exam. On May 25th, resume full Optional weight.

Mentor note: The aspirants who clear are not the ones who study the most hours — they are the ones whose Optional was always touched, whose newspaper was always read, and whose static GS was revised in a cycle. The split is the strategy. Pin this table on your wall.

📚 Sources & References

Ujiyari Ujiyari — Current Affairs