Union Public Service Commission (UPSC) has released the official notification for Combined Defence Services Examination (CDS) I, 2026 under Advt No. 04/2026. Through this examination, a total of 451 vacancies will be filled in Indian Military Academy (IMA), Indian Naval Academy (INA), Air Force Academy (AFA), and Officers’ Training Academy (OTA).

Eligible candidates can apply online for the UPSC CDS I Online Form 2026 through the official UPSC website. Below is a complete, updated.

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✅ Overview

UPSC CDS I Recruitment 2026

UPSC CDS I Vacancy Details 2026 – Total 451 Posts

Eligibility Criteria – UPSC CDS I 2026

Nationality

• Citizen of India, or

• Subject of Nepal / Bhutan, or

• Tibetan refugee (as per UPSC rules)

Educational Qualification – UPSC CDS I 2026

• IMA & OTA: Graduation Degree in any stream

• INA: Engineering Degree

• AFA: Graduation with Physics & Mathematics at 10+2 OR Engineering Degree

Required Documents – UPSC CDS I Online Form 2026

• Aadhaar Card / Valid Photo ID

• 10th & 12th Certificates

• Graduation / Engineering Degree

• Recent Passport-size Photograph

• Scanned Signature

• Email ID & Mobile Number

• Category Certificate (if applicable)

Step-by-Step – How to Apply UPSC CDS I Online Form 2026

1. Visit the official website upsc.gov.in

2. Click on “Apply Online” under CDS Examination (I) 2026

3. Complete One-Time Registration (OTR) if not registered

4. Login using OTR credentials

5. Fill the CDS I application form carefully

6. Upload photo, signature, and documents

7. Pay the application fee online

8. Review and submit the form

9. Download and print the confirmation page

UPSC CDS I Syllabus 2026 (Updated)

Written Examination

For IMA, INA & AFA

For OTA (Men & Women)

Elementary Mathematics Topics

• Arithmetic

• Algebra

• Trigonometry

• Geometry

• Mensuration

• Statistics

General Knowledge Topics

• Current Affairs

• History

• Geography

• Indian Polity

• Defence & Security

• General Science

Selection Process – UPSC CDS I Recruitment 2026

1. Written Examination (UPSC)

2. SSB Interview (5 Days)

3. Document Verification

4. Medical Examination

5. Final Merit List

Important Tips for UPSC CDS I Aspirants

• Read the full notification carefully before applying

• Focus on English & GK accuracy

• Practice previous year CDS question papers

• Maintain physical fitness for SSB

• Apply early to avoid last-minute server issues

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Conclusion – UPSC CDS I Recruitment 2026

The UPSC CDS I Online Form 2026 is a prestigious opportunity for candidates aspiring to become commissioned officers in the Indian Armed Forces. With 451 vacancies, candidates should prepare seriously for both the written examination and SSB interview. Apply within the deadline and follow the official UPSC guidelines strictly.

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❓ FAQ –

UPSC CDS I Online Form 2026

Q1: How many vacancies are available in UPSC CDS I 2026?

A total of 451 posts.

Q2: Can female candidates apply for CDS I 2026?

Yes, females can apply for OTA (Women).

Q3: Is Maths compulsory for OTA?

No, Mathematics is not required for OTA.

Q4: What is the official website for CDS application?

upsc.gov.in

Q5: What is the selection process for CDS?

Written Exam → SSB Interview → Medical → Merit List.

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