What Is UPSC Civil Services Examination? IAS, IPS, IFS & Other Services

The UPSC Civil Services Examination (CSE) is widely considered the premier administrative recruitment process in India. It is the sole gateway to the All-India Services and senior Central Civil Services (Group A and Group B), shaping the administrative, diplomatic, revenue, and internal security leadership of the nation.

Every year, between 800,000 and 1,000,000 candidates register for the examination, competing for approximately 800 to 1,200 vacancies.

What is the Civil Services Examination?

The Civil Services Examination is a nationwide competitive test conducted by the Union Public Service Commission in accordance with the Civil Services Examination Rules notified by the Department of Personnel and Training (DoPT).

Selected officers manage public policy formulation, district administration, tax collections, external foreign affairs, policing, railway accounts, and statutory audits across central ministries and state governments.

Classification of Participating Services

Successful candidates are allocated to distinct service categories based on rank, category, and preference:

1. All-India Services (AIS)

Officers belong to joint cadres serving both the Union and individual States:

• Indian Administrative Service (IAS): Generalist district administration (Sub-Divisional Magistrate, District Magistrate), heading state secretariats, and central government joint secretaries.
• Indian Police Service (IPS): Law enforcement, public order, criminal investigation (ASP, SP, DIG, DGP), intelligence agencies (IB, RAW), and central paramilitary forces (CRPF, BSF, CISF).
• (Note: The third All-India Service, the Indian Forest Service (IFoS), selects candidates through a separate Mains examination, though it shares the common Preliminary stage).

2. Central Civil Services – Group A

Officers serve exclusively under the Union Government:

• Indian Foreign Service (IFS): Diplomacy, consular operations, international trade treaties, and embassy administration.
• Indian Revenue Service (IRS - Income Tax & Customs/GST): Direct and indirect tax policy, enforcement, and assessment.
• Indian Audit & Accounts Service (IA&AS): Working under the Comptroller and Auditor General (CAG).
• Indian Defence Accounts Service (IDAS) & Indian Defence Estates Service (IDES)
• Indian Postal Service (IPoS) & Indian Communication Finance Services (ICFS)
• Indian Information Service (IIS) & Indian Trade Service (ITS)

3. Central Civil Services – Group B

• DANICS: Delhi, Andaman & Nicobar Islands, Lakshadweep, Daman & Diu and Dadra & Nagar Haveli Civil Service.
• DANIPS: Police Service for Union Territories.
• Armed Forces Headquarters Civil Service (AFHQCS)

The Three-Stage Examination Architecture

The examination spans roughly one full year from notification to final results:

Stage 1: Preliminary Examination (May / June)
         Two Objective Papers (GS Paper I + CSAT) | Screening Filter
                           ↓
Stage 2: Main Examination (September / October)
         9 Written Descriptive Papers (1750 Marks) | Merit Determinator
                           ↓
Stage 3: Personality Test / Interview (January – April)
         Board Interview at Dholpur House (275 Marks)
                           ↓
Final Merit List (Total: 2025 Marks) & Cadre Allocation

Overview of Stages

Stage 1: Preliminary Examination

• Paper I (General Studies): 100 questions, 200 marks (2 hours). Covers history, geography, polity, economics, environment, and general science. Determines screening merit for the Mains.
• Paper II (CSAT - Civil Services Aptitude Test): 80 questions, 200 marks (2 hours). Reading comprehension, logical reasoning, and basic numeracy. Strictly qualifying; requires 33% (66 marks).

Stage 2: Main Examination (Written Descriptive)

Consists of 9 conventional essay-type papers over 5 days:

• 2 Qualifying Language Papers (Indian Language & English, 300 marks each, 25% qualifying mark).
• 1 Essay Paper (250 marks).
• 4 General Studies Papers (GS I, GS II, GS III, GS IV, 250 marks each).
• 2 Optional Subject Papers (250 marks each from a selected discipline).

Stage 3: Personality Test (Interview)

Conducted at UPSC headquarters in New Delhi by an unbiased panel. Carries 275 marks. There is no minimum qualifying score; marks scored are combined directly with written Mains marks to establish the final rank.

Review live notifications on the UPSC Civil Services Recruitment page, read about UPSC Eligibility Rules, and compare exam formats in UPSC Prelims vs Mains.