Optional Subject Success Rate in UPSC: Official Data

Optional Subject Success Rate

The optional subject success rate in UPSC is the single most misread number in civil services preparation. Every year, aspirants rank optionals by “success percentage” and pick the subject sitting at the top of that list — without asking what the denominator is, how many candidates it is built on, or whether the subject caused the result at all.

This article rebuilds the picture from the primary source: Table-5 of the UPSC Annual Report, which publishes, for every optional subject, the number of candidates who appeared in the Civil Services (Main) Examination and the number finally recommended for appointment. We have taken the three most recent Annual Reports carrying this table — the 72nd (2021–22), 73rd (2022–23) and 74th (2023–24) — covering CSE 2020, CSE 2021 and CSE 2022, and pooled them into a single three-year dataset of 32,048 Mains candidates and 2,601 selections.

What “success rate” actually means in UPSC data

UPSC does not publish a “best optional” list. What it publishes, in Section 6 and Table-5 of each Annual Report, is a two-column count per optional subject — candidates appeared in the Main Examination, and candidates recommended for appointment — with the ratio expressed as a percentage.

The exact formula UPSC uses

Two things follow immediately, and both are routinely missed.

• It is an end-to-end rate, not an optional-paper rate. A candidate counted as “recommended” under Geography cleared Essay, four General Studies papers, both optional papers and the interview. The optional contributes 500 of 1,750 written marks — about 28.6% of the written total and 24.7% of the final 2,025 marks. The other 75% is doing most of the work.
• It is not the same as UPSC’s other success rate. Table-4 of the same report gives a success rate by academic stream using interviewed candidates as the denominator — which is why that number sits around 40%, not 8%. Aspirants frequently quote one figure while describing the other.

The baseline you must compare every subject against

A subject’s success rate means nothing in isolation. It only means something against the all-India optional baseline for the same year.

Exam Year	Source	Appeared in Mains	Interviewed	Recommended	Mains → Final	Interview → Final
CSE 2020	72nd Annual Report (2021–22)	10,343	2,049	833	8.1%	40.7%
CSE 2021	73rd Annual Report (2022–23)	8,930	1,819	748	8.4%	41.1%
CSE 2022	74th Annual Report (2023–24)	12,775	2,525	1,020	8.0%	40.4%
Three years combined	—	32,048	6,393	2,601	8.1%	40.7%

The baseline is remarkably stable: 8.1%, 8.4% and 8.0% across the three years, averaging 8.12%. Meanwhile the interview-to-final conversion holds at roughly 40–41% throughout. In plain terms — the Mains written stage, not the interview, is where optionals decide outcomes. Roughly one in twelve Mains candidates makes the final list; two in five interviewees do.

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Optional subject success rate in UPSC: complete three-year table

The table below pools CSE 2020, CSE 2021 and CSE 2022 into a single three-year figure for every optional that had at least one candidate. Pooling matters: single-year rates for smaller optionals swing wildly because they rest on a handful of candidates. The Sample Reliability column flags how much weight the number can bear — High (300+ candidates over three years), Moderate (100–299) and Low (fewer than 100, where the figure is statistically meaningless).

#	Optional Subject	Appeared (3 yrs)	Recommended (3 yrs)	Success Rate	Sample Reliability
1	Manipuri Literature	10	3	30.0%	Low
2	English Literature	108	17	15.7%	Moderate
3	Punjabi Literature	70	10	14.3%	Low
4	Management	99	14	14.1%	Low
5	Commerce & Accountancy	605	73	12.1%	High
6	Economics	698	84	12.0%	High
7	Law	610	71	11.6%	High
8	Hindi Literature	725	83	11.4%	High
9	Maithili Literature	53	6	11.3%	Low
10	Medical Science	557	63	11.3%	High
11	Malayalam Literature	271	30	11.1%	Moderate
12	Kannada Literature	220	22	10.0%	Moderate
13	Chemistry	449	44	9.8%	High
14	Zoology	166	16	9.6%	Moderate
15	Electrical Engineering	429	39	9.1%	High
16	Marathi Literature	22	2	9.1%	Low
17	Botany	95	8	8.4%	Low
18	Sociology	4,168	350	8.4%	High
19	Psychology	479	40	8.4%	High
20	Political Science & International Relations	5,812	481	8.3%	High
21	Public Administration	1,391	115	8.3%	High
22	Anthropology	4,170	329	7.9%	High
23	Mechanical Engineering	545	41	7.5%	High
24	Telugu Literature	80	6	7.5%	Low
25	Tamil Literature	126	9	7.1%	Moderate
26	Statistics	14	1	7.1%	Low
27	Geography	3,661	255	7.0%	High
28	Philosophy	992	69	7.0%	High
29	Civil Engineering	420	29	6.9%	High
30	Agriculture	378	26	6.9%	High
31	Mathematics	1,932	129	6.7%	High
32	Gujarati Literature	124	8	6.5%	Moderate
33	Geology	140	8	5.7%	Moderate
34	Sanskrit Literature	109	6	5.5%	Moderate
35	Physics	442	24	5.4%	High
36	Animal Husbandry & Veterinary Science	38	2	5.3%	Low
37	History	1,791	87	4.9%	High
38	Urdu Literature	32	1	3.1%	Low
39	Bengali Literature	7	0	0.0%	Low
40	Sindhi Literature	5	0	0.0%	Low
41	Assamese Literature	3	0	0.0%	Low
42	Odia Literature	2	0	0.0%	Low

Source: UPSC Annual Reports, 72nd (2021–22), 73rd (2022–23) and 74th (2023–24), Table-5. Rates computed by pooling raw counts across the three years; three-year totals reconcile exactly with Table-2 of each report (32,048 appeared, 2,601 recommended).

Year-by-year breakdown for every optional

The same data, disaggregated. Each cell shows recommended / appeared with the success rate in brackets, so you can see both the trend and the sample it rests on.

Optional Subject	CSE 2020	CSE 2021	CSE 2022	3-Yr Rate
Agriculture	3 / 111 (2.7%)	12 / 115 (10.4%)	11 / 152 (7.2%)	6.9%
Animal Husbandry & Veterinary Science	1 / 10 (10.0%)	1 / 18 (5.6%)	0 / 10 (0.0%)	5.3%
Anthropology	100 / 1211 (8.3%)	90 / 1159 (7.8%)	139 / 1800 (7.7%)	7.9%
Assamese Literature	0 / 2 (0.0%)	—	0 / 1 (0.0%)	0.0%
Bengali Literature	0 / 2 (0.0%)	0 / 3 (0.0%)	0 / 2 (0.0%)	0.0%
Botany	2 / 27 (7.4%)	3 / 32 (9.4%)	3 / 36 (8.3%)	8.4%
Chemistry	15 / 153 (9.8%)	14 / 127 (11.0%)	15 / 169 (8.9%)	9.8%
Civil Engineering	9 / 130 (6.9%)	10 / 135 (7.4%)	10 / 155 (6.5%)	6.9%
Commerce & Accountancy	27 / 210 (12.9%)	21 / 140 (15.0%)	25 / 255 (9.8%)	12.1%
Economics	31 / 236 (13.1%)	25 / 190 (13.2%)	28 / 272 (10.3%)	12.0%
Electrical Engineering	15 / 170 (8.8%)	7 / 117 (6.0%)	17 / 142 (12.0%)	9.1%
English Literature	6 / 27 (22.2%)	3 / 27 (11.1%)	8 / 54 (14.8%)	15.7%
Geography	95 / 1322 (7.2%)	66 / 1079 (6.1%)	94 / 1260 (7.5%)	7.0%
Geology	2 / 35 (5.7%)	1 / 29 (3.4%)	5 / 76 (6.6%)	5.7%
Gujarati Literature	4 / 49 (8.2%)	2 / 32 (6.2%)	2 / 43 (4.7%)	6.5%
Hindi Literature	19 / 226 (8.4%)	22 / 211 (10.4%)	42 / 288 (14.6%)	11.4%
History	24 / 581 (4.1%)	25 / 574 (4.4%)	38 / 636 (6.0%)	4.9%
Kannada Literature	7 / 83 (8.4%)	7 / 60 (11.7%)	8 / 77 (10.4%)	10.0%
Law	23 / 167 (13.8%)	21 / 180 (11.7%)	27 / 263 (10.3%)	11.6%
Maithili Literature	3 / 31 (9.7%)	2 / 12 (16.7%)	1 / 10 (10.0%)	11.3%
Malayalam Literature	10 / 93 (10.8%)	8 / 74 (10.8%)	12 / 104 (11.5%)	11.1%
Management	6 / 38 (15.8%)	5 / 31 (16.1%)	3 / 30 (10.0%)	14.1%
Manipuri Literature	1 / 4 (25.0%)	1 / 2 (50.0%)	1 / 4 (25.0%)	30.0%
Marathi Literature	1 / 9 (11.1%)	1 / 8 (12.5%)	0 / 5 (0.0%)	9.1%
Mathematics	26 / 580 (4.5%)	50 / 513 (9.7%)	53 / 839 (6.3%)	6.7%
Mechanical Engineering	22 / 201 (10.9%)	11 / 160 (6.9%)	8 / 184 (4.3%)	7.5%
Medical Science	16 / 162 (9.9%)	24 / 196 (12.2%)	23 / 199 (11.6%)	11.3%
Odia Literature	0 / 2 (0.0%)	—	—	0.0%
Philosophy	20 / 347 (5.8%)	20 / 265 (7.5%)	29 / 380 (7.6%)	7.0%
Physics	8 / 130 (6.2%)	7 / 131 (5.3%)	9 / 181 (5.0%)	5.4%
Political Science & International Relations	154 / 1863 (8.3%)	140 / 1571 (8.9%)	187 / 2378 (7.9%)	8.3%
Psychology	11 / 155 (7.1%)	15 / 127 (11.8%)	14 / 197 (7.1%)	8.4%
Public Administration	38 / 509 (7.5%)	31 / 361 (8.6%)	46 / 521 (8.8%)	8.3%
Punjabi Literature	3 / 25 (12.0%)	2 / 15 (13.3%)	5 / 30 (16.7%)	14.3%
Sanskrit Literature	1 / 39 (2.6%)	2 / 34 (5.9%)	3 / 36 (8.3%)	5.5%
Sindhi Literature	0 / 1 (0.0%)	0 / 2 (0.0%)	0 / 2 (0.0%)	0.0%
Sociology	115 / 1245 (9.2%)	92 / 1087 (8.5%)	143 / 1836 (7.8%)	8.4%
Statistics	0 / 5 (0.0%)	0 / 3 (0.0%)	1 / 6 (16.7%)	7.1%
Tamil Literature	4 / 64 (6.2%)	2 / 27 (7.4%)	3 / 35 (8.6%)	7.1%
Telugu Literature	5 / 36 (13.9%)	1 / 20 (5.0%)	0 / 24 (0.0%)	7.5%
Urdu Literature	1 / 11 (9.1%)	0 / 7 (0.0%)	0 / 14 (0.0%)	3.1%
Zoology	5 / 41 (12.2%)	4 / 56 (7.1%)	7 / 69 (10.1%)	9.6%

An em-dash indicates the optional had no candidate appearing in Mains that year. Of the 48 optionals UPSC offers — 25 subjects plus literature of 23 languages — only 40 to 42 recorded any candidate in a given year. Literature of Bodo, Dogri, Kashmiri, Konkani, Nepali and Santhali had no takers at all in any of the three years.

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Which optionals actually perform, once sample size is respected

Filter to the 20 optionals with 300 or more Mains candidates over three years, and the noise disappears. Eleven beat the 8.12% baseline; nine fall below it.

The six optionals that beat the baseline every single year

Consistency is a far stronger signal than a single high year. These six cleared the all-India average in CSE 2020, CSE 2021 and CSE 2022:

1. Commerce & Accountancy — 12.9%, 15.0%, 9.8% (three-year: 12.1%, 73 of 605)
2. Economics — 13.1%, 13.2%, 10.3% (three-year: 12.0%, 84 of 698)
3. Law — 13.8%, 11.7%, 10.3% (three-year: 11.6%, 71 of 610)
4. Hindi Literature — 8.4%, 10.4%, 14.6% (three-year: 11.5%, 83 of 725)
5. Medical Science — 9.9%, 12.2%, 11.6% (three-year: 11.3%, 63 of 557)
6. Chemistry — 9.8%, 11.0%, 8.9% (three-year: 9.8%, 44 of 449)

Note the shape of this list. Four of the six — Commerce, Economics, Law and Medical Science — are subjects whose serious candidate pool is gated by a degree. A chartered accountant taking Commerce, an MBBS taking Medical Science or an LLB taking Law is not a general aspirant who picked a scoring subject; they are a specialist with three to five years of formal training in the syllabus, typically stronger academic preparation overall, and often fewer competing demands on Mains revision time.

The five optionals that stayed below the baseline every year

1. History — 4.1%, 4.4%, 6.0% (three-year: 4.9%, 87 of 1,791). The weakest performer of any high-volume optional, at roughly 60% of the all-India rate.
2. Physics — 6.2%, 5.3%, 5.0% (three-year: 5.4%, 24 of 442). The only major optional with a steadily falling rate across all three years.
3. Civil Engineering — 6.9%, 7.4%, 6.5% (three-year: 6.9%, 29 of 420).
4. Philosophy — 5.8%, 7.5%, 7.6% (three-year: 7.0%, 69 of 992). Improving, but still short of the baseline each year.
5. Geography — 7.2%, 6.1%, 7.5% (three-year: 7.0%, 255 of 3,661). The largest optional to sit consistently below average.

The subjects UPSC itself names each year — and why they keep changing

Each Annual Report highlights the highest-scoring optionals among subjects opted by 100 or more candidates. Here is what UPSC named, year by year:

Rank	CSE 2020	CSE 2021	CSE 2022
1	Law 13.8% (23/167)	Commerce & Accountancy 15.0% (21/140)	Hindi Literature 14.6% (42/288)
2	Economics 13.1% (31/236)	Economics 13.2% (25/190)	Electrical Engineering 12.0% (17/142)
3	Commerce & Accountancy 12.9% (27/210)	Medical Science 12.2% (24/196)	Medical Science 11.6% (23/199)
4	Mechanical Engineering 10.9% (22/201)	Psychology 11.8% (15/127)	Malayalam Literature 11.5% (12/104)
5	Medical Science 9.9% (16/162)	Law 11.7% (21/180)	Economics 10.3% (28/272)

Not one subject appears in all three top-three lists. Economics features in two, Medical Science in two, and everything else appears once. If the “best optional” were a stable property of the subject, the same names would recur. They do not — which is the clearest available evidence that year-to-year rankings are substantially noise, and that building a two-year preparation plan around last year’s topper subject is chasing a moving target.

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The popularity trap: where everyone actually goes

Six optionals absorb two-thirds of the entire Mains pool.

Optional Subject	Appeared (3 yrs)	Share of Mains Pool	Recommended	Success Rate
Political Science & International Relations	5,812	18.1%	481	8.3%
Anthropology	4,170	13.0%	329	7.9%
Sociology	4,168	13.0%	350	8.4%
Geography	3,661	11.4%	255	7.0%
Mathematics	1,932	6.0%	129	6.7%
History	1,791	5.6%	87	4.9%
Six subjects combined	21,534	67.2%	1,631	7.6%
All optionals (baseline)	32,048	100%	2,601	8.1%

67.2% of all Mains candidates take one of six subjects, and those six produce 62.7% of all selections — a slight underperformance against their share. The concentration has practical consequences that raw success rates hide.

What the concentration actually does to you

• Evaluation is relative. With nearly 2,400 candidates writing PSIR in CSE 2022 alone, the examiner has an enormous internal distribution to calibrate against. Competent-but-ordinary answers land squarely in the middle of a very crowded band. In a subject with 150 candidates, the same relative standing is reached differently.
• Marginal information is exhausted. Popular optionals have saturated coaching markets, meaning the baseline answer quality is high. Your competition has read the same standard sources and practised the same standard question banks. Differentiation costs more effort, not less.
• Popularity is not a quality signal. PSIR, Anthropology and Sociology are the three most-chosen optionals, and all three sit within half a percentage point of the 8.12% baseline. Geography, the fourth most popular, sits more than a point below it. Aspirants often read popularity as crowd-verified endorsement; the data shows the crowd converges on average outcomes.

How the big six have moved across three years

• PSIR remained the most preferred optional in all three years, growing from 1,863 to 2,378 candidates — a 27.6% rise — while its success rate drifted from 8.3% to 7.9%.
• Anthropology overtook Geography to become the second most popular optional by CSE 2022 (1,800 candidates), with its rate easing from 8.3% to 7.7%.
• Sociology shows the clearest single-direction decline among the big six: 9.2% → 8.5% → 7.8%, even as its candidate count grew by nearly 50%.
• Mathematics is the most volatile high-volume optional on record: 4.5% → 9.7% → 6.3%. A candidate who chose Mathematics in 2021 on the strength of the 2020 figure, or avoided it in 2022 on the strength of 2021, was reacting to noise both times.
• History improved from 4.1% to 6.0% but remained the lowest-performing large optional throughout, and continues to attract over 600 candidates a year.

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Success rate by subject family

Grouping optionals into families removes some of the small-sample distortion and exposes a pattern individual rows obscure.

Subject Family	Appeared (3 yrs)	Recommended	Success Rate
Humanities & social sciences (non-literature)	24,476	1,968	8.0%
Literature of languages (all 17)	1,967	203	10.3%
Pure sciences	3,238	230	7.1%
Engineering (Civil, Electrical, Mechanical)	1,394	109	7.8%
Medical & agricultural sciences	973	91	9.4%
All optionals	32,048	2,601	8.1%

The literature optionals as a family return 10.3% — the highest of any group, and about 27% above the all-India baseline. This is the strongest single argument for the “native language literature” strategy, and it deserves careful reading rather than enthusiasm.

Literature optionals in detail

Literature Optional	Appeared (3 yrs)	Recommended	Success Rate
Manipuri Literature	10	3	30.0%
English Literature	108	17	15.7%
Punjabi Literature	70	10	14.3%
Hindi Literature	725	83	11.4%
Maithili Literature	53	6	11.3%
Malayalam Literature	271	30	11.1%
Kannada Literature	220	22	10.0%
Marathi Literature	22	2	9.1%
Telugu Literature	80	6	7.5%
Tamil Literature	126	9	7.1%
Gujarati Literature	124	8	6.5%
Sanskrit Literature	109	6	5.5%
Urdu Literature	32	1	3.1%
Assamese Literature	3	0	0.0%
Bengali Literature	7	0	0.0%
Odia Literature	2	0	0.0%
Sindhi Literature	5	0	0.0%
All 17 literatures combined	1,967	203	10.3%

The mechanism behind the literature family’s performance is almost entirely self-selection by fluency. Candidates who take Malayalam, Kannada, Punjabi or Hindi Literature are overwhelmingly native or near-native speakers, frequently with formal literature backgrounds, choosing a syllabus they have absorbed since school. The barrier to entry is high enough that casual optional-shoppers never enter the pool — which is precisely why the surviving pool converts well.

Technical optionals: the cross-domain story

Engineering optionals return 7.8% and pure sciences 7.1% — both below baseline. What makes this striking is that the recommended candidates are overwhelmingly from those backgrounds. The Annual Reports quantify the gap directly:

Among candidates recommended	CSE 2020	CSE 2021	CSE 2022
Held an engineering degree	64.9%	60.4%	53.1%
Held a humanities degree	23.2%	25.1%	29.0%
Chose an engineering optional	5.5%	3.7%	3.4%
Chose a humanities optional (incl. literature)	85.1%	80.8%	84.1%

In CSE 2022, 53.1% of successful candidates were engineers, but only 3.4% used an engineering optional. UPSC states the conclusion plainly in its own report: “most of the candidates have made a cross domain shift from their original stream to humanities.” The engineering optional success rate is therefore not measuring engineers — it is measuring the small residue of engineers who chose not to switch, a self-selected minority that is not representative of engineering aspirants at all.

One trend inside this is worth noting for its direction rather than its level: the engineering share of successful candidates has fallen steadily — 64.9% → 60.4% → 53.1% — while the humanities share has risen from 23.2% to 29.0%. The applicant profile of the examination is shifting.

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Why success rate is a weak basis for choosing an optional

Everything above is accurate. Almost none of it should drive your decision on its own. Four independent problems make the success rate a poor selection instrument.

Problem 1: The numbers carry a margin of error that nobody quotes

A success rate estimated from a sample has a confidence interval. For small optionals the interval is so wide the point estimate is close to worthless:

Optional Subject	Sample Size (3 yrs)	Observed Rate	95% Margin of Error	True Rate Plausibly Lies Between
Political Science & International Relations	5,812	8.3%	±0.7 pp	7.6% – 9.0%
Sociology	4,168	8.4%	±0.8 pp	7.6% – 9.2%
Public Administration	1,391	8.3%	±1.4 pp	6.8% – 9.7%
Law	610	11.6%	±2.5 pp	9.1% – 14.2%
Medical Science	557	11.3%	±2.6 pp	8.7% – 13.9%
English Literature	108	15.7%	±6.9 pp	8.9% – 22.6%
Management	99	14.1%	±6.9 pp	7.3% – 21.0%
Statistics	14	7.1%	±13.5 pp	0.0% – 20.6%

Management’s headline 14.1% has a 95% confidence interval running from roughly 7% to 21% — it could plausibly be a below-average optional. English Literature’s 15.7% could plausibly be 9%. Meanwhile PSIR’s 8.3% is pinned to within ±0.7 points because it rests on 5,812 candidates. The subjects with the most impressive-looking rates are precisely the ones whose rates we know least well.

Problem 2: Selection effect, not subject effect

This is the central error. Success rate measures the composition of a subject’s candidate pool, and pools differ systematically:

• Degree-gated subjects (Law, Medical Science, Commerce & Accountancy, Economics, Management) draw candidates who have already completed three to five years of formal training in the syllabus. Their advantage is prior mastery, not the paper.
• Language literature subjects draw near-native speakers with a decade or more of unconscious exposure.
• Large humanities subjects (PSIR, Sociology, Anthropology, Geography) are the default choice of first-time general aspirants — including a large share of first-attempt candidates who would have a below-average conversion rate whatever they had chosen.

Switching to Law does not confer a Law graduate’s advantage. It gives you a syllabus you must build from zero, competing against people who did not.

Problem 3: The optional is a quarter of the total, and everyone clears the same GS papers

Optional Papers I and II carry 500 marks against a written total of 1,750 and a grand total of 2,025 including the interview. A candidate scoring 300/500 in the optional against a peer scoring 250/500 gains 50 marks — meaningful at the margin, but smaller than the spread routinely seen across Essay and four GS papers combined. The optional decides ranks; General Studies and Essay decide selections far more often.

Problem 4: The data is three to six years old by the time you use it

Table-5 for CSE 2022 was published in the 74th Annual Report. A candidate reading it today is projecting it onto an examination two or more cycles later, with different question papers, different examiners and a differently composed candidate pool. The volatility in Mathematics (4.5% → 9.7% → 6.3%) and Mechanical Engineering (10.9% → 6.9% → 4.3%) shows how quickly a single subject’s figure can move.

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How to actually choose your optional subject

Replace “which optional has the highest success rate” with a sequence of questions that predict your outcome rather than describing someone else’s.

Step 1 — Start with genuine prior exposure

If you hold a degree in a subject on the optional list, that subject starts with an advantage no success rate can transfer to you. This is the one factor the data unambiguously supports: every consistently above-baseline optional is one where a large share of takers arrive pre-trained. Graduation subject beats every other consideration.

Step 2 — Test the syllabus, not the reputation

Download the official UPSC syllabus for your two or three shortlisted optionals and read every line. Then open the last three years of question papers for each. You are testing two things: whether you can hold interest in this material for eighteen months, and whether the question style rewards how you think — conceptual and argumentative, or factual and technical.

Step 3 — Audit General Studies overlap honestly

Overlap is real but consistently overstated in marketing. A realistic assessment:

Optional	Genuine GS Overlap	Where It Helps
PSIR	Substantial	GS Paper II (polity, governance, international relations) and Essay
Geography	Substantial	GS Paper I (physical geography, resources), Prelims environment and mapping
Sociology	Moderate to substantial	GS Paper I (society) and GS Paper II (social justice, schemes), Essay
Public Administration	Moderate	GS Paper II (governance) and GS Paper IV (ethics in administration)
Anthropology	Moderate	GS Paper I (tribal society, culture) and GS Paper II (vulnerable sections)
History	Moderate	GS Paper I (Indian and world history), Prelims art and culture
Economics	Moderate	GS Paper III (economy) and Prelims economy, though at greater technical depth
Philosophy	Limited to moderate	GS Paper IV (ethics) and Essay
Law	Limited to moderate	GS Paper II (constitution) and current legal affairs
Engineering, pure sciences, Medical Science	Minimal	Marginal support to GS Paper III science and technology
Literature optionals	Minimal	Essay language quality and GS Paper I culture, for some languages

Overlap saves revision time and improves Essay quality. It does not make an unsuited subject suitable.

Step 4 — Check the infrastructure exists

Before committing, confirm that standard reference books are available and current, that previous year question papers are accessible for at least ten years, that answer copies or model answers exist to calibrate against, and that you can find at least one person who has cleared with that optional and can be asked questions. This filter alone eliminates several optionals whose success rates look attractive on paper.

Step 5 — Commit and stop comparing

The single most damaging pattern visible in aspirant behaviour is switching optionals in the second year after reading a fresh success-rate table. Switching discards a year of accumulated depth in exchange for a subject whose advantage, as shown above, is largely an artefact of who takes it. Once you have chosen on prior exposure, syllabus fit and infrastructure, the decision is closed.

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Key takeaways

1. The all-India optional subject success rate in UPSC is 8.1% — 2,601 recommended from 32,048 Mains candidates across CSE 2020, 2021 and 2022.
2. Among the 20 optionals with reliable sample sizes, rates run from 4.9% (History) to 12.1% (Commerce & Accountancy). Eleven beat the baseline, nine fall below it.
3. Six optionals beat the baseline in all three years — Commerce & Accountancy, Economics, Law, Hindi Literature, Medical Science, Chemistry. Five fell short in all three — History, Physics, Civil Engineering, Philosophy, Geography.
4. Four of the six consistent outperformers are degree-gated subjects. Their rates measure candidate quality, not paper generosity.
5. The top-three list UPSC publishes changes completely every year. No subject appeared in all three lists across CSE 2020–2022.
6. Six optionals absorb 67.2% of the Mains pool and return 62.7% of selections — a slight underperformance relative to their share.
7. Literature optionals as a family return 10.3%, the highest of any group, driven almost entirely by native-speaker self-selection.
8. 53.1% of CSE 2022 selections held engineering degrees, but only 3.4% used an engineering optional. The cross-domain shift to humanities is near-universal.
9. Small-sample optionals carry margins of error of ±7 percentage points or more. The most impressive-looking rates are the least trustworthy.
10. The optional is 500 of 2,025 final marks. Choose on prior exposure, syllabus fit, GS overlap and material availability — and use success rate only to veto a choice you cannot otherwise justify.

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Frequently asked questions