UPSC CDS (I): Exam Date, Notification & Latest Update

UPSC CDS (I) 2027: Who It Is For, What It Offers, What It Demands

The Combined Defence Services Examination (I) 2027 is the Union Public Service Commission’s competitive entry route into India’s permanent officer corps. Conducted by UPSC, it recruits for the Indian Military Academy (Dehradun), Indian Naval Academy (Ezhimala), Air Force Academy (Hyderabad) and the two Officers’ Training Academies (Chennai for men, Wellington for women). Unlike the Civil Services Examination, which feeds the civilian bureaucracy, CDS feeds the executive arm of the armed forces—officers who command platoons, ships and squadrons on a daily basis.

For a broad readership scanning multiple exams, CDS is worth considering if you are comfortable with a shorter training pipeline (12–18 months versus 24–30 months for IAS) and if you are prepared for a career that blends operational command with lifelong postings across India and abroad. The trade-off is a higher physical and psychological bar: the Services Selection Board interview is not an academic hurdle but an assessment of officer potential, resilience and teamwork under stress.

How the Exam Unfolds — Three Clear Stages

Stage 1 — Written Prelims (Objective, 2 hours)

The first stage is a single two-hour objective test covering English comprehension, general knowledge and elementary mathematics at Class X level. The paper is qualifying only; marks are not carried forward to the final merit list. For candidates who have already attempted the Civil Services Aptitude Test (CSAT), the format will feel familiar, though the GK weightage is heavier in CDS. The key to clearing this stage is speed and accuracy: aim to finish the paper with 15–20 minutes in hand to review flagged questions.

Stage 3 — SSB Interview (Five Days)

The final stage is the Services Selection Board interview, a five-day residential assessment that evaluates officer potential through intellectual competence and social adaptability. Day 1 is screening (Officer Intelligence Rating and Picture Perception & Description Test), which typically eliminates one-third of candidates. Days two through four include psychology tests, group tasks, personal interviews and outdoor tasks. The conference on the final day synthesises the entire performance into a 90-second summary. The SSB does not test academic knowledge; it tests character, leadership instincts and the capacity to work under fatigue.

Vacancies and Competition — What the Numbers Show

The exact number of vacancies for each academy is published only in the official UPSC notification released on 2 December 2026. Historically, the Indian Military Academy (IMA) offers the largest cohort—around 100–120 vacancies—while the Air Force Academy and Naval Academy each field 20–30 vacancies. The Officers’ Training Academy (OTA) accounts for the remainder, often exceeding 100 vacancies in total because it trains both men and women for short-service commissions.

Competition intensity varies by academy. IMA typically sees 8–12 applicants per vacancy, whereas OTA can exceed 20 applicants per vacancy because the eligibility bar is lower and the training duration is shorter. A candidate who is on the borderline for IMA may still secure a seat in OTA if they treat it as a credible Plan B rather than a fallback.

For readers comparing CDS with other exams, note that the written stages are far less crowded than the Civil Services Examination. The prelims cut-off is usually 60–70 marks out of 100, so a candidate who scores 70–80 can qualify without aiming for a high percentile. The real gatekeeper is the SSB interview, where roughly 60–70% of qualified candidates are finally recommended.

Who Can Apply — The Official Rules

The precise eligibility criteria for CDS (I) 2027—age brackets, educational qualifications, marital status and nationality—are set out in the official notification published on 2 December 2026. UPSC does not pre-announce these rules; they appear only in the notification itself. Candidates should verify their eligibility directly from the UPSC website rather than relying on last year’s figures, because the Commission occasionally adjusts clauses such as age relaxations or educational requirements.

What is certain is that the notification will be exhaustive: any ambiguity is resolved by the UPSC decision, not by coaching manuals or online forums. For a broad readership, the key takeaway is to read the notification carefully before investing time in preparation.

Syllabus Overview — What You Need to Know

The syllabus is broad but shallow. Elementary mathematics tests arithmetic, algebra, geometry and mensuration at Class X level; English tests précis writing and comprehension; GK spans static portions (history, polity, geography) and dynamic portions (science, economics, current affairs).

For readers deciding whether to attempt CDS alongside other exams, note that the GK syllabus overlaps heavily with the Civil Services Preliminary Examination. A candidate who is already preparing for CSE can leverage that overlap for GK, but should still budget extra time for CDS-specific précis writing and elementary mathematics.

Preparation in Brief — What You Must Do

If You Are New to Competitive Exams