Complete Guide to CDS 1 2027 application form 2026

The CDS 1 2027 application form will be released by the Union Public Service Commission (UPSC) on December 16, 2026, at upsc.gov.in. Eligible candidates can submit their online applications until January 5, 2027, to apply for IMA, INA, AFA, and OTA courses commencing in 2028.

What is the Exam?

The Combined Defence Services (CDS) Examination is a national-level competitive exam conducted twice a year by the Union Public Service Commission (UPSC). It serves as the gateway for graduates aspiring to join the Indian Armed Forces as commissioned officers in the Indian Military Academy (IMA), Indian Naval Academy (INA), Air Force Academy (AFA), and Officers Training Academy (OTA).

At ExamBhai, we have tracked defence exam trends over the past decade. The CDS exam tests candidates across general knowledge, English, and elementary mathematics. Successful candidates in the written examination are called for the Service Selection Board (SSB) interview, followed by comprehensive medical tests.

Joining the armed forces through CDS is one of the most prestigious routes for male and female graduates in India. While IMA, INA, and AFA train cadets for Permanent Commission, OTA trains candidates for Short Service Commission (SSC).

Key Highlights 2026

To help you stay ahead in your preparation journey, we have compiled the core details of the upcoming CDS 1 2027 examination cycle below:

Syllabus 2026

The CDS syllabus is designed to evaluate a candidate's overall awareness, command of the English language, and mathematical aptitudes up to Class 10 level. The subject-wise breakdown is outlined in the table below:

Mathematics Topic Breakdown

• Arithmetic: Number System, Fundamental Operations, HCF & LCM, Ratio & Proportion, Percentage, Profit & Loss, Simple & Compound Interest, Time & Work, Time & Distance.
• Algebra: Basic Operations, Remainder Theorem, Theory of Quadratic Equations, Relation between roots and coefficients, Simultaneous Linear Equations.
• Trigonometry: Sine (\theta), Cosine (\theta), Tangent (\theta), Trigonometric Identities, Simple cases of Heights and Distances.
• Geometry: Lines and Angles, Triangles, Parallelogram, Rectangles, Squares, Circles, and Theorems.
• Mensuration: Surface areas and Volumes of Cubes, Cuboids, Spheres, Hemispheres, Circular Cylinders, and Cones.

Exam Pattern

The CDS examination pattern differs slightly based on whether you are applying for Permanent Commission (IMA, INA, AFA) or Short Service Commission (OTA).

Exam Pattern for IMA, INA, and AFA

For IMA, INA, and AFA, candidates must appear for all three papers: English, General Knowledge, and Elementary Mathematics.

Exam Pattern for Officers Training Academy (OTA)

Candidates applying exclusively for OTA (Men or Women) are exempt from the Elementary Mathematics paper.

Marking Scheme

• Every correct answer in English and General Knowledge carries (100/120 = 0.83) marks.
• Every correct answer in Mathematics carries (100/100 = 1) mark.
• There is negative marking for wrong answers. One-third (1/3) of the marks assigned to that question will be deducted for each incorrect answer.
• You can practice free mock tests for CDS 2027 on ExamBhai to build speed and accuracy according to this exact marking scheme.

Eligibility Criteria

According to official guidelines available on upsc.gov.in, candidates must fulfill the following nationality, age limit, educational qualification, and marital status criteria:

Nationality

A candidate must be either a citizen of India, a subject of Nepal, or a person of Indian origin who has migrated from specified countries with the intention of permanently settling in India.

Educational Qualifications

• For IMA and OTA: Degree from a recognized university or equivalent.
• For INA: Degree in Engineering from a recognized university/institution.
• For AFA: Degree of a recognized university (with Physics and Mathematics at 10+2 level) or Bachelor of Engineering.
• Note: Candidates studying in the final year/semester of their graduation degree are also eligible to apply provisionally.

Age Limit & Marital Status

• IMA: Unmarried male candidates born not earlier than 2nd January 2004 and not later than 1st January 2009.
• INA: Unmarried male candidates born not earlier than 2nd January 2004 and not later than 1st January 2009.
• AFA: Age limit is 20 to 24 years (Unmarried male candidates). Upper age limit relaxed up to 26 years for candidates holding valid Commercial Pilot Licence issued by DGCA.
• OTA (Men): Unmarried male candidates born not earlier than 2nd January 2003 and not later than 1st January 2009.
• OTA (Women): Unmarried women, issueless widows who have not remarried, and issueless divorcees who have not remarried, born not earlier than 2nd January 2003 and not later than 1st January 2009.

Application Process

Completing the CDS 1 2027 application form requires careful attention to detail. Candidates must apply online using the UPSC One Time Registration (OTR) platform.

1. One Time Registration (OTR): Visit the official portal upsc.gov.in and complete your OTR registration if you haven't already. Verify details like Name, Gender, Date of Birth, and Mobile Number.
2. Fill CDS 1 2027 Application - Part I: Log in using your OTR ID (Email/Mobile/OTR ID) and password. Fill in personal details, choice of academy preferences (IMA, INA, AFA, OTA), and educational details.
3. Application Fee Payment: Pay the application fee of (200) INR online via Net Banking, SBI UPI, Credit/Debit cards, or cash at any SBI branch. Female/SC/ST candidates are exempt from paying the fee.
4. Fill Application - Part II: Select your preferred exam center, upload photo ID proof, photo, and signature as per specified dimensions.
5. Submit & Print: Verify all entered data and submit the application. Take a printout of the confirmation slip for future reference.

Preparation Strategy

At ExamBhai, we recommend a structured 6-month roadmap to crack CDS 1 2027 on your first attempt.

• Master the Fundamentals: Build concept clarity first. For General Knowledge, rely on NCERT textbooks from Class 8 to 12 for History, Polity, Geography, and Science. For Mathematics, revise Class 9 and 10 NCERT books.
• Daily Current Affairs & Editorial Reading: Read national daily newspapers to build vocabulary for English and stay updated on international events, defense deals, and government schemes.
• Consistent Practice: Resolve previous years' question papers (PYQs) from the past 10 years to understand UPSC's evolving question patterns and difficulty level.
• Attempt Mocks and Analyze: To simulate exam conditions, attempt online practice tests for CDS 2027 on ExamBhai regularly. Focus on reducing negative marks through elimination techniques.
• Strengthen Weak Topics: Use time-bound subject quizzes to turn your weak areas into strengths. You can access subject-wise CDS 2027 prep quizzes on ExamBhai to measure your speed.

Cut-Off Trends

Understanding previous years' cut-off trends helps in setting realistic target scores. As published on the official portal upsc.gov.in, the written examination cut-offs for recent CDS cycles are summarized below:

Note: Candidates must score a minimum qualifying mark of (20%) in each individual paper to be considered in the final merit list, regardless of the overall aggregate score.

Frequently Asked Questions

Q1: When will the CDS 1 2027 notification be released?

UPSC will release the official CDS 1 2027 notification on December 16, 2026, on its official website upsc.gov.in.

Q2: Can final year college students apply for the CDS 1 2027 exam?

Yes, students studying in their final year of graduation are eligible to apply provisionally, provided they do not have any backlogs and can submit proof of passing at the time of commencement of the course.

Q3: Is there any fee exemption for female candidates applying for CDS 1 2027?

Yes, all female candidates as well as SC/ST candidates are completely exempt from paying the application fee of (200) INR.

Q4: Are women candidates eligible for IMA, INA, or AFA through CDS?

Women candidates can apply for the Air Force Academy (AFA) if they meet the specific eligibility requirements, and for the Officers Training Academy (OTA) for Short Service Commission. IMA and INA entries through CDS are currently open to male candidates.

Q5: What is the minimum qualifying mark per subject in the CDS written exam?

Candidates must score at least (20%) marks in each individual subject paper (English, General Knowledge, and Mathematics) to qualify the written examination.

Q6: Can I edit my CDS 1 2027 application form after submission?

UPSC usually provides a window for application correction after the closing date. However, candidates are advised to verify all details carefully before final submission to avoid any complications.