Last verified: against the CSS Competitive Examination Rules 2019 and FPSC's CSS 2026 written-exam public notice. Sources in the References section.
CSS Syllabus: Compulsory & Optional Subjects Explained
The CSS written examination consists of twelve papers worth 1,200 marks in total — six compulsory papers fixed for every candidate, and optional papers you select yourself, totalling exactly 600 marks. Getting the structure of this right, before you open a single syllabus PDF, saves months of misdirected preparation.
The structure at a glance
| Component | Marks | Papers |
|---|---|---|
| Compulsory subjects | 600 | 6 papers, 100 marks each |
| Optional subjects | 600 | Your choice, totalling exactly 600 marks |
| Total | 1,200 | 12 papers |
Each paper runs three hours. Most papers include a Part-I objective section — collected roughly thirty minutes into the exam — followed by a Part-II subjective section. Optional papers generally carry 20 MCQs in Part-I, with Applied Mathematics and Pure Mathematics as exceptions to this pattern.
The six compulsory subjects
| Paper | Marks | Notes |
|---|---|---|
| English Essay | 100 | The single highest-failure paper — see below |
| English (Precis & Composition) | 100 | Comprehension, precis, grammar and composition |
| General Science & Ability | 100 | Broad science literacy plus general reasoning |
| Current Affairs | 100 | Domestic and international developments; overlaps heavily with Pakistan Affairs and IR optionals |
| Pakistan Affairs | 100 | History, constitution, politics and society of Pakistan |
| Islamic Studies | 100 | Comparative Study of Major Religions is substituted for non-Muslim candidates |
These six papers are identical for every candidate, regardless of academic background. There is no exemption route for any of them.
Why the English papers deserve disproportionate attention
FPSC has publicly confirmed — in a 2025 Senate committee session — that most candidates fail specifically in English Essay and Precis & Composition. A 2016 FPSC-linked report found roughly 92 per cent of candidates failed the essay paper outright. This single fact should influence how you allocate study time across the six compulsory papers far more than the equal 100-mark weighting suggests; it is covered in full in our dedicated essay-writing guide.
Optional subject rules
Optional papers must total exactly 600 marks, selected under two constraints:
- No more than 200 marks may be taken from any single group below
- A subject worth 200 marks comprises two separate papers; a subject worth 100 marks is a single paper
In practice, most candidates build their 600 marks from a combination such as: two 200-mark subjects plus two 100-mark subjects, or three 200-mark subjects, drawn across at least three different groups to satisfy the per-group cap.
The seven optional groups
Group I
Economics · Political Science · International Relations · Accountancy & Auditing · Computer Science
Group II
Physics · Chemistry · Applied Mathematics · Pure Mathematics · Statistics · Geology
Group III
Business Administration · Public Administration · Governance & Public Policies · Town Planning & Urban Management
Group IV
History of Pakistan & India · Islamic History & Culture · British History · European History · History of the USA
Group V
Gender Studies · Environmental Sciences · Agriculture & Forestry · Botany · Zoology · English Literature · Urdu Literature
Group VI
Law · Constitutional Law · International Law · Muslim Law & Jurisprudence · Mercantile Law · Criminology · Philosophy
Group VII
Journalism & Mass Communication · Psychology · Geography · Sociology · Anthropology · Languages (Punjabi, Sindhi, Pashto, Balochi, Persian, Arabic, Urdu, and others)
FPSC last substantially revised this group structure in 2016, and the framework remains structurally unchanged for the CSS 2026/2027 cycles.
How to actually choose, in brief
This deserves a full article of its own — see our dedicated guide to optional subject selection — but the short version is: prioritise overlap with your compulsory papers over rumoured "high-scoring" status, since scoring patterns shift year to year with examiner marking. Political Science, International Relations and Pakistan Affairs are commonly paired because they reinforce Current Affairs and each other; science graduates often pair one precise, closed-ended science optional with a social-science subject for balance.
Full marks summary
| Component | Marks |
|---|---|
| Written examination (compulsory + optional) | 1,200 |
| Viva voce | 300 |
| Total for final merit | 1,500 |
Passing thresholds: 40 per cent in each compulsory paper, 33 per cent in each optional paper, and a 50 per cent aggregate (600/1,200) to qualify for the viva voce.
Frequently asked questions
How many subjects does a CSS candidate study in total?
Six compulsory subjects (fixed) plus a self-selected combination of optional subjects totalling 600 marks — commonly four to six optional subjects depending on their individual mark values.
Can I choose all my optional subjects from one group?
No. No more than 200 marks may come from a single group, so your 600 marks must be spread across at least three groups.
Is the syllabus the same every year?
The group and subject structure has been stable since FPSC's 2016 revision, but always download the current year's official syllabus, since detailed topic lists within a paper can be updated.
Where do I get the official syllabus?
Directly from fpsc.gov.pk, alongside the year's examination advertisement. Avoid relying on summarised or reformatted versions from third-party sites for the final topic list.
References
- Establishment Division, CSS Competitive Examination Rules, 2019. View PDF
- Federal Public Service Commission, Public Notice: CSS Competitive Examination 2026 (Written), No.F.2/1/2022-CE, 7 December 2025. View PDF
- ProPakistani, "Here's why most CSS aspirants fail" — English paper failure data, 5 June 2025. Read report
- Federal Public Service Commission official website — current syllabus downloads. fpsc.gov.pk
Always cross-check the detailed topic list within each paper against the current year's official FPSC syllabus PDF before finalising your preparation.