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TNPSC group 1

Conducted by Tamil Nadu Public Service Commission (TNPSC)

  1. Prelims
  2. Mains
  3. Interview

Prelims GS and aptitude, a Tamil test and three descriptive GS papers

TNPSC group 1 syllabus for prelims and mains

Civil servicesTop state postsTamil test 40%Updated 26 Oct 2026

The TNPSC group 1 syllabus has two written stages: an objective prelims testing general studies plus aptitude, then a descriptive mains with a Tamil eligibility test followed by three general studies papers, before a 100 mark interview. This is the Combined Civil Services Examination I, the route to top state posts including Deputy Collector, Assistant Commissioner in commercial taxes and DSP.

Because the mains is entirely descriptive and degree standard, Group 1 behaves much more like a civil services exam than the other TNPSC groups. Read on for the exam pattern, every unit of the prelims and mains syllabus, and a plan that treats the two stages as one preparation.

Exam at a glance

  • Conducted by

    Tamil Nadu Public Service Commission
  • Exam

    Combined Civil Services Examination I (Group I services)
  • Prelims

    200 objective questions, 300 marks, 3 hours
  • Mains

    Tamil eligibility test (100) plus three GS papers of 250 marks, 3 hours each
  • Interview

    Interview and records, 100 marks
  • Negative marking

    None in the prelims
  • Official website

TNPSC group 1 exam pattern

Preliminary examination (objective, OMR)
PartQuestionsPitched at
General Studies175Graduation level
Aptitude and Mental Ability Test25Class 10 (SSLC) level
Whole paper200300 marks in 3 hours
Main written examination (descriptive)
PaperSubjectStandardMarks
Paper ITamil Eligibility Test (qualifying)SSLC100
Paper IIGeneral Studies IDegree250
Paper IIIGeneral Studies IIDegree250
Paper IVGeneral Studies IIIDegree250

Each mains paper lasts 3 hours. Papers II to IV are valued only if you score at least 40 of 100 in the Tamil test. Your rank comes from Papers II to IV (750 marks) plus the interview (100 marks), so 850 marks decide selection. Prelims marks only shortlist you for the mains.

Reports of the latest scheme give minimum prelims marks of 90 for reserved communities and 120 for others, and a mains minimum of 225 or 300 out of 750 respectively.

Minimum marks, the number of candidates called for the mains and exemptions from the Tamil test (for some differently abled candidates) are set in the notification. Treat the current notice as the final word on these.

TNPSC group 1 syllabus for prelims general studies

The general studies part is spread over nine units. Expect questions at graduation level, with a heavy Tamil Nadu tilt in the last two.

  1. Science in general: the scientific temper, elementary physics and chemistry, living things, ecology and the environment.
  2. Events of the day: recent happenings in history, national symbols, profiles of states, polity and economy topics seen in the news, new work in science, people in the headlines.
  3. India's geography: relief and landforms, the monsoon, rivers, soil types, mineral and forest wealth, farming, transport links, population, disasters, a warming climate.
  4. Indian history with culture: the great dynasties, the story of South India, shifts in society and culture, unity amid diversity.
  5. Polity: the Constitution, who is a citizen, rights with duties and directive principles, governments at the Centre and in the states, local bodies, elections, courts, human rights.
  6. Economy of India: planning and the NITI Aayog, the Reserve Bank, budgets and money supply, the Finance Commission and GST, farms, factories and welfare in villages.
  7. The freedom struggle: the first uprisings, the Congress and its leaders, forms of protest, the partition.
  8. Tamil Nadu's history, heritage and social movements: Sangam literature, Thirukkural, the state's share in the freedom struggle, reform movements.
  9. Development administration in the state: human development measures, welfare schemes, social justice through reservation, schools and health care, e-governance.

Aptitude and mental ability for the prelims

These 25 questions are set at SSLC level, which makes them the easiest marks in the paper if you practise speed.

  • Simplification, percentage
  • Ratio, proportion, HCF, LCM
  • Interest, both simple and compound
  • Mensuration: areas and volumes
  • Work done against time
  • Puzzles, dice, picture based and logical reasoning
  • Alpha numeric reasoning and number series

With no penalty for an incorrect bubble in this paper, never leave an aptitude bubble blank even if you are short of time.

TNPSC group 1 mains syllabus, all four papers

Paper I, the Tamil test: translating passages both ways between Tamil and English, précis, comprehension, expanding hints into passages, an essay on themes drawn from Thirukkural, official letters, and grammar such as sentence correction, synonyms and antonyms.

Paper II, General Studies I:

  • India's modern history and its culture (100 marks): colonial rule and early revolts, national leaders, constitutional development up to independence, Tamil Nadu's role in the struggle, social reform, the Justice Party.
  • Social issues in India and Tamil Nadu (100 marks): population, education, child protection, women's empowerment, urbanisation, health, minorities and human rights.
  • Ethics and integrity (50 marks): ethical theories, ethics in Indian thought and Thirukkural, public service values, corruption.

Paper III, General Studies II:

  • Indian polity and emerging political trends (100 marks): Constitution, federalism, judiciary, local government, civil services, foreign policy.
  • Role and impact of science and technology in India's development (100 marks): energy, space, nano technology, computing, biotechnology, health.
  • Tamil society, culture and heritage (50 marks): archaeology, Sangam to modern times, arts and literature, Dravidian movements. This unit may be answered in Tamil or English.

Paper IV, General Studies III:

  • Geography, general and Indian, with a focus on Tamil Nadu (75 marks).
  • Environment, biodiversity and disaster management (75 marks).
  • Indian economy and the impact of the global economy, including the Tamil Nadu economy (100 marks).

What changed in the scheme

Under the revised scheme the Commission added the Tamil Eligibility Test as Paper I of the mains, so the old three paper mains became four papers with one qualifying paper. The Commission has also issued an updated mains syllabus that reorganises the three general studies papers into the units shown above, each with marks attached. The prelims structure of 175 general studies and 25 aptitude questions stayed the same.

If you are using notes prepared for the older scheme, map them against the current unit list on the official syllabus page before you start.

Mains units ranked by marks

The unit marks in the mains tell you where the payoff is. Modern history, social issues, polity, science and technology and the economy each carry 100 marks, so together they make up 500 of the 750 merit marks. Ethics, Tamil heritage, geography and environment carry the remaining 250.

Karthik works in a bank in Coimbatore and has about nine months. He spends his first three months on the prelims units that also feed the mains (polity, economy, modern history, Tamil Nadu development), then shifts to answer writing three evenings a week. One Sunday each month is kept for a full Tamil test practice paper so the qualifying paper never becomes a surprise.

For reading, use Tamil Nadu state board school books for history, geography and science, standard graduation level texts for polity and economy, and the state's economic survey and policy notes for development administration.

A study plan for prelims and mains together

  1. Months 1 to 3: cover the nine prelims units, building short notes that you can later expand into mains answers.
  2. Month 4: prelims practice tests twice a week, with aptitude drills every day.
  3. Months 5 to 7: mains depth. Write two answers of 10 to 15 marks a day, rotating across the three GS papers, and one Tamil translation or précis exercise.
  4. Month 8 onward: full length mains practice under three hour timing, plus current events linked to Tamil Nadu.

Aiming at the lower groups too? Then the TNPSC group 2 syllabus shares much of the prelims content, and the TNPSC group 4 syllabus is a good fallback at SSLC level. Group 1 answer writing also overlaps strongly with the UPSC syllabus.

Frequently asked questions

Should I guess in the TNPSC group 1 prelims?

Yes. TNPSC does not cut marks for wrong answers in the prelims, so a reasoned guess costs you nothing. Fill in every one of the 200 bubbles.

Do prelims marks count for the final rank?

No. The prelims is a screening test. Final ranking uses mains Papers II to IV and the interview, a total of 850 marks.

What if I score below 40 in the Tamil eligibility test?

If you score below 40 out of 100 in Paper I, your three general studies papers are not valued at all, however well you wrote them. Treat this paper as a gate you must clear.

Which language can I use for the mains answers?

The medium rules are set in the notification. The current syllabus states that the Tamil society and heritage unit of Paper III may be answered in Tamil or English, while Paper I tests Tamil itself. Look up the medium rules for the remaining papers in the current notice before deciding.

Which degree and age do I need for Group 1?

A graduate degree is the basic qualification, with some posts asking for more. Age limits differ by post and community, so check the table of posts in the current notice.

How is Group 1 different from Group 2?

Group 1 leads to the senior posts, has a fully descriptive mains with three degree level GS papers and an interview. Group 2 follows a separate pattern, explained on its own page.