Tamil Nadu Public Service Commission Combined Statistical Subordinate Service
TNPSC Combined Statistical Subordinate Service is a recruitment exam conducted by Tamil Nadu Public Service Commission, relevant to candidates preparing for state government department recruitment.
The TNPSC Combined Statistical Subordinate Service Examination (CSSSE) is the written examination the Tamil Nadu Public Service Commission uses to fill statistical posts in Tamil Nadu government departments. It is aimed at graduates in Statistics, Mathematics, Economics and related subjects who want a state government career built on data work.
This page gives you the exam at a glance: posts, eligibility, pattern, syllabus, selection, pay and preparation. Figures come from the most recent notification we could verify, the 2022 cycle. We could not find a current-cycle notification for this exam at the time of writing, so check the official TNPSC website before you plan around any date or vacancy number.
Table of Contents
Exam at a glance
Particular | Details |
|---|---|
Conducting body | Tamil Nadu Public Service Commission (TNPSC) |
Exam name | Combined Statistical Subordinate Service Examination |
Posts (2022 cycle) | Assistant Statistical Investigator, Computor, Statistical Compiler |
Mode of selection | Written examination, followed by certificate verification and counselling |
Papers | Paper I (Statistics or Mathematics, 300 marks) and Paper II (Tamil eligibility test plus General Studies) |
Marks counted for ranking | 450 |
Job location | Tamil Nadu |
Official website |
Notification status and past cycles
TNPSC does not hold this exam every year, and it announces it through a notification on its website. The most recent cycle we could verify was notified on 15 September 2022, with the written test on 29 January 2023. An earlier cycle was held in January 2022 under a different scheme and a different set of posts.
As of 26 October 2026 we have not found an official notification for a new cycle, and the third-party annual planner summaries we reviewed do not list this exam. Treat any vacancy count or date you see for the next cycle as unconfirmed until it appears on the TNPSC site.
Important dates (2022 cycle, for reference)
Event | Date |
|---|---|
Notification and online application start | 15 September 2022 |
Last date to apply | 14 October 2022 |
Application correction window | 19 to 21 October 2022 |
Paper I | 29 January 2023, 9:30 AM to 12:30 PM |
Paper II | 29 January 2023, 2:00 PM to 5:00 PM |
These are past dates and are shown only so you can see how the schedule runs. The next cycle will have its own dates, and tentative dates can change. Track the official notification page on tnpsc.gov.in and your registered email.
Posts, vacancies and pay
Post | Vacancies (2022 cycle) | Pay scale in the 2022 notification |
|---|---|---|
Assistant Statistical Investigator | 211 | Rs. 20,600 to Rs. 75,900 |
Computor | 5 | Rs. 19,500 to Rs. 71,900 |
Statistical Compiler | 1 | Rs. 19,500 to Rs. 71,900 |
Total | 217 | Per Tamil Nadu government rules |
The vacancy split shows where the real competition lies: almost all seats are for Assistant Statistical Investigator. Pay scales are revised from time to time, so confirm the current scale in the new notification. In-hand salary depends on allowances and deductions and is not an official figure.
Eligibility in brief
Eligibility is post-specific. In the 2022 cycle, Assistant Statistical Investigator accepted a degree in Statistics, Mathematics, Computer Science, Economics or Computer Applications with Statistics, or any degree plus a postgraduate degree in Operations Research, Econometrics or Mathematical Economics. Statistical Compiler needed a degree in Statistics, and Computor needed a degree in Statistics or Bio Statistics.
The upper age limit was 32 years for candidates in the general category as on 1 July 2022, with no upper limit for several reserved categories. Knowledge of Tamil is tested in Paper II. The full rules, relaxations and exceptions are on the eligibility page.
Exam pattern
Paper | Content | Questions | Marks | Time |
|---|---|---|---|---|
Paper I | Statistics or Mathematics, degree standard | 200 | 300 | 3 hours |
Paper II, Part A | Tamil eligibility test, SSLC standard (qualifying) | 100 | 150 | 3 hours for Part A and Part B together |
Paper II, Part B | General Studies (75 questions) and Aptitude and Mental Ability (25 questions) | 100 | 150 | Shared with Part A |
All papers are objective type. Rank is decided on Paper I plus Paper II Part B, a total of 450 marks. Part A is a qualifying test, so it decides whether you stay in the race but does not add to your rank. Older pages may still show the pattern of the January 2022 cycle, so follow the official notification. See the exam pattern page for marking, qualifying rules and time management.
Syllabus summary
Section | Main areas |
|---|---|
Paper I: Statistics | Probability, distributions, estimation, tests of hypothesis, sampling, quality control, time series, index numbers, statistical computing using Excel |
Paper I: Mathematics | Algebra, calculus, differential equations, real and complex analysis, vector calculus, operations research, mathematical statistics |
Paper II Part B | General science, current events, Indian polity and economy, geography, history, Tamil Nadu history and administration, aptitude |
Paper II Part A | Tamil grammar, usage, translation and sentence correction at SSLC level |
TNPSC publishes unit headings rather than long topic lists, so use the syllabus page as a working checklist and confirm against the official scheme.
Selection process
Written examination: two objective papers, with the Tamil eligibility test as a qualifying hurdle.
Rank list: prepared on the 450 ranking marks, applying reservation rules and minimum qualifying marks.
Certificate verification: candidates in the shortlist are called to verify documents.
Counselling and allotment: posts are allotted by rank and preference.
There is no interview in the 2022 cycle scheme. Always confirm this in the new notification.
How to apply
Applications go through the One Time Registration system on the official TNPSC website. In the 2022 cycle the registration fee was Rs. 150 and the examination fee was Rs. 100, with exemptions for SC, ST, destitute widows and candidates with benchmark disabilities. Keep your degree certificates, community certificate and a scanned photograph and signature ready before you start.
How to prepare
Paper I carries two thirds of your ranking marks, so it decides your rank. Start there, and treat Paper II as a scoring opportunity that is easy to neglect.
Build the Paper I core first: probability, distributions, estimation and hypothesis testing take the most effort, so finish them before sampling, quality control and index numbers.
Add General Studies steadily: 30 to 40 minutes a day on polity, economy, Tamil Nadu history and current events works better than cramming.
Do not ignore Tamil: the Part A qualifying mark is a hurdle even for strong statistics candidates.
Practise under time: each question gives you about 54 seconds across both papers, so speed matters.
Once you have a few scores, the cut-off guide will help you set a target.