UPSC IES ISS is a combined exam for two Group A services - the Indian Economic Service (IES) and the Indian Statistical Service (ISS). It is held by the Union Public Service Commission (UPSC). IES officers work as economists in central ministries, and ISS officers handle official statistics, surveys and data across the government.
The exam has a written part of 1,000 marks and a viva voce of 200 marks. There is no separate prelims. The number of posts is small each year, so the competition is close.
- One exam fills two services - IES for economists and ISS for statisticians.
- The written exam carries 1,000 marks and the viva 200 marks.
- General English and General Studies papers are common to both services.
- Vacancies and rules change each year - confirm them in the current UPSC notification.
About the two services
| Point | Indian Economic Service | Indian Statistical Service |
|---|---|---|
| Cadre controlling body | Ministry of Finance (Department of Economic Affairs) | Ministry of Statistics and Programme Implementation |
| Main work | Economic analysis, policy notes, project appraisal and budget-related work in ministries | Collecting and analysing official data, surveys, price indices and national accounts |
| Set up | 1961 | 1961 |
Officers of both services are posted in ministries across the Government of India, and some serve in international bodies on deputation.
Eligibility
| Service | Education in recent notices |
|---|---|
| IES | Post-graduate degree in Economics, Applied Economics, Business Economics or Econometrics |
| ISS | Bachelor's degree with Statistics, Mathematical Statistics or Applied Statistics as a subject, or a master's degree in one of these |
The age limit in recent notices has been 21 to 30 years on the cut-off date, with relaxation for SC/ST, OBC, persons with disabilities and some others. Final-year students can apply if they pass before the date given in the notice.
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Cover the full General Studies syllabus in a fixed, structured schedule.
IES papers
| Paper | Marks |
|---|---|
| General English | 100 |
| General Studies | 100 |
| General Economics I | 200 |
| General Economics II | 200 |
| General Economics III | 200 |
| Indian Economics | 200 |
All IES papers are descriptive. General Economics covers micro and macro theory, growth and development, money and banking, international economics, public finance and quantitative methods. Indian Economics covers planning, agriculture, industry, poverty, employment, external sector and recent reforms.
ISS papers
| Paper | Type | Marks |
|---|---|---|
| General English | Descriptive | 100 |
| General Studies | Descriptive | 100 |
| Statistics I | Objective | 200 |
| Statistics II | Objective | 200 |
| Statistics III | Descriptive | 200 |
| Statistics IV | Descriptive | 200 |
The statistics papers cover probability, statistical inference, linear models, sampling, design of experiments, econometrics, official statistics and some numerical methods. The objective papers carry negative marking as per the notice.
Viva voce
Candidates who qualify the written exam are called for a viva voce of 200 marks. The board checks:
- Depth in economics or statistics, especially topics related to Indian policy and data.
- Awareness of current economic issues such as inflation, growth, trade and budgets.
- Clarity, judgement and suitability for a policy role.
Final merit is based on the written marks and the viva together.
General English and General Studies
These two papers are common to IES and ISS and carry 100 marks each.
- General English - essay, precis writing, comprehension and grammar. A clear, well-structured essay can make a real difference.
- General Studies - current events, Indian polity, history, geography and general science, at a level expected of a graduate.
All papers must be answered in English.
Which service suits you?
The choice depends on your degree and interest:
- If you enjoy economic theory, policy debates and writing notes on growth, trade or budgets, IES fits better.
- If you enjoy data, sampling, surveys and statistical methods, ISS fits better.
A candidate can usually apply for only one of the two services in a year, so decide early and focus your preparation.
IES vs RBI Grade B (DEPR)
| Point | UPSC IES | RBI Grade B (DEPR) |
|---|---|---|
| Employer | Central ministries | Reserve Bank of India |
| Exam | Descriptive papers and viva | Written phases and interview |
| Focus | Government policy and programmes | Monetary policy, banking and research |
The economics syllabus overlaps, so many candidates prepare for both.
Pay and career
IES and ISS officers join at the Junior Time Scale of a Group A service, at Level 10 of the 7th Pay Commission pay matrix with a starting basic pay of ₹56,100, plus allowances.
With promotions, officers move to senior posts such as Director, Joint Secretary and Economic or Statistical Adviser in ministries, and can work on the Economic Survey, national accounts, price indices and major data surveys.
How to apply
- Complete the one-time registration on the UPSC online portal.
- Fill the IES/ISS application, choosing the service and exam centre.
- Pay the fee (exempt for some categories).
- Download the e-admit card and read all instructions.
UPSC usually releases the notice in the first half of the year, with the written exam a few months later. Check the UPSC exam calendar.
A simple study plan
| Phase | Focus |
|---|---|
| Months 1-3 | Core papers - General Economics or Statistics - from standard textbooks |
| Month 4 | Indian Economics (IES) or Statistics III-IV (ISS), with Economic Survey and Budget notes |
| Month 5 | General English essay practice and General Studies revision |
| Month 6 | Previous papers, timed answer writing and viva preparation |
How to prepare
Previous papers. Solve at least ten years of papers to understand the depth and style of questions.
Answer writing. For descriptive papers, practise writing structured answers with diagrams, equations and Indian examples within time limits.
Current economy. Read the Economic Survey, the Union Budget highlights and RBI reports. These help in Indian Economics, General Studies and the viva.
Statistics practice. For ISS, solve numerical problems daily. Speed and accuracy matter in the objective papers.
Exam-day plan. The written exam runs over three days with long papers. Plan time per question, attempt the ones you know best first, and leave a few minutes to revise each answer sheet.
Documents to keep ready
- Class 10 certificate for date of birth.
- Marksheets and certificates of graduation and post-graduation, year-wise where asked.
- Caste, EWS, non-creamy layer or disability certificate in the format given in the notice, where relevant.
- Photo identity proof, recent photographs and a signature scan for the online form.
Make sure your name and date of birth match across all documents. Mismatches cause trouble at verification.
Common mistakes
- Ignoring General English. The essay can decide close ranks.
- Only reading theory without writing answers.
- Weak Indian economy knowledge for IES.
- Guessing in objective statistics papers with negative marking.
- Using an old syllabus. Follow the latest UPSC notice.
For other UPSC exams, see the UPSC Civil Services, UPSC ESE and RBI Grade B guides.
Frequently Asked Questions
What is UPSC IES ISS?
It is a combined UPSC exam for the Indian Economic Service and the Indian Statistical Service, two Group A central services for economists and statisticians.
What is the eligibility for IES?
Recent notices have required a post-graduate degree in Economics, Applied Economics, Business Economics or Econometrics, with an age of 21 to 30 years on the cut-off date.
What is the eligibility for ISS?
Recent notices have required a bachelor's degree with Statistics, Mathematical Statistics or Applied Statistics as a subject, or a master's in one of these, with an age of 21 to 30 years.
What is the IES ISS exam pattern?
The written exam carries 1,000 marks, with General English and General Studies of 100 marks each and four subject papers of 200 marks each. A viva voce of 200 marks follows.
Is there a prelims in UPSC IES ISS?
No. There is a single written exam followed by a viva voce.
Which ministry controls the Indian Statistical Service?
The Indian Statistical Service is controlled by the Ministry of Statistics and Programme Implementation, while the Indian Economic Service is under the Department of Economic Affairs in the Ministry of Finance.