The Bihar Public Service Commission (BPSC) has opened the application window for the Bihar DSO Mains Exam 2025 for candidates who qualified the prelims held on 03 August 2025. Today, 12 December 2025, is the final day to submit the Bihar DSO Mains application form, and candidates who have not yet applied must complete the process before the deadline closes. The mains examination will follow the revised pattern announced in the official notification, and timely submission of the form is essential for appearing in this crucial stage of the selection process.
Bihar DSO Mains Exam Date 2025 Out
BPSC has released the official notice for the Bihar DSO Mains Exam 2025. According to the latest notification, the District Statistical Officer / Assistant Director (Main) Written Examination will be conducted on 29 January 2026 and 30 January 2026. The online application window for mains remains open from 22 November 2025 to 12 December 2025 for candidates who qualified the prelims. The Commission has also mentioned that exam dates may be revised due to administrative reasons.
The mains exam will include three descriptive papers: General Hindi, General Studies, and Statistics. The detailed exam schedule, admit card, and exam instructions will be released soon. Candidates should now focus on descriptive writing, revision, and practising previous papers to perform well in the mains exam.

Bihar DSO Recruitment 2025 – Overview
| Particulars | Details |
|---|---|
| Organization | Bihar Public Service Commission |
| Post Name | District Statistical Officer (DSO) |
| Advertisement Number | 38/2025 |
| Vacancies | 47 |
| Prelims Exam Date | 03 August 2025 |
| Mains Exam Date | 29-30 January 2026 |
| Mains Application Window | 22 November – 12 December 2025 |
| Mains Exam Type | Descriptive |
| Website | bpsc.bihar.gov.in |
BPSC District Statistical Officer Notification 2025 PDF
The BPSC District Statistical Officer Notification 2025 outlines important information, including eligibility requirements, selection procedures, age relaxations, exam pattern, and more. Candidates are advised to carefully read the complete notification before applying online. A direct link to download the Bihar DSO Notification 2025 PDF is provided here for your convenience. Ensure that you prepare thoroughly in accordance with the exam syllabus and stay informed about any official announcements. Timely application submission is crucial to avoid missing this opportunity.
BPSC District Statistical Officer Vacancy 2025
The Bihar Public Service Commission has announced a total of 47 posts, out of which 16 are reserved for women. Candidates can check the detailed category-wise vacancies from the table below:
| BPSC District Statistical Officer Vacancy 2025 | ||
| Category | Total Posts |
Women (35% Horizontal Reservation)
|
| Unreserved | 19 | 7 |
| Economically Weaker Section (EWS) | 5 | 2 |
| Scheduled Caste | 7 | 2 |
| Scheduled Tribe | 0 | 0 |
| Extremely Backward Class | 9 | 3 |
| Backward Class | 6 | 2 |
| Backward Class Ladies | 1 | 0 |
| Total | 47 | 16 |
Bihar DSO Mains Application Form Link 2025
The Bihar Public Service Commission (BPSC) has activated the online application link for the Bihar DSO Mains Exam 2025. All candidates who qualified the prelims exam must complete the mains application process within the given timeline. Candidates are required to upload essential documents, pay the examination fee, and submit the detailed mains form through the official BPSC portal.
The direct link to apply for the BPSC DSO Mains Exam 2025 is provided below for the convenience of candidates. Applicants must ensure that all details are accurate and all documents are properly scanned before submission.
Bihar DSO Apply Link 2025 – Click here (Active)
Documents Required for Bihar DSO/ Assistant Director Online Form 2025
While filling out the BPSC DSO / Assistant Director Online Form 2025, candidates must keep the following documents ready:
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Passport-size Photograph
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Recent colored photograph
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The background should be white or light-colored
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Signature
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Clear signature on white paper
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Use a black or blue pen only
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Educational Certificates
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Master’s Degree in Statistics / Mathematics / Economics from a recognized university
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The degree must be completed on or before the last date of application submission
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For exact eligibility, refer to the official notification
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Caste Certificate (if applicable)
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Required for candidates belonging to SC/ST/OBC categories
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ID Proof
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Aadhaar Card, Voter ID, or any other valid government-issued ID
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Domicile Certificate
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Proof of permanent residence (especially important for Bihar state candidates)
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Income Certificate (if applicable)
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Mandatory for candidates applying under the EWS (Economically Weaker Section) category
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Other Certificates (if applicable)
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PH (Physically Handicapped) Certificate
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Ex-servicemen Certificate
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Any other relevant certificates mentioned in the notification
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Note: Ensure all scanned documents meet the format and size requirements as stated in the official BPSC notification.
Bihar DSO Exam Fees
Candidates must pay the application fee online to complete the BPSC District Statistical Officer 2025. Applications without the fee will not be accepted.
Fee Details:
- SC/ST/Women/Handicapped/Permanent Bihar Residents: Rs. 150/-
- Gen/ OBC/ EWS/ Others: Rs. 600/
- PH Candidates: Rs. 200
BPSC DSO Eligibility Criteria
Candidates interested in applying should meet the required educational qualifications and age limit shared on the official website.
Educational Qualification
A Master’s Degree in Statistics or Mathematics, or Economics from a recognized University.
Age Limit:
The cutoff date to calculate the age limit is 01 August 2025. Check the minimum and maximum age limits shared on the official website.
- Minimum Age: 21 years
- Maximum Age: 37 years
- Maximum Age: 40 (female)
BPSC District Statistical Officer Exam Pattern
Candidates preparing for the Bihar DSO or Assistant Director Examination should be aware of the latest exam pattern and other details mentioned on the official website. Here, we have shared the BPSC DSO Exam Pattern details.
| Particulars | Details |
|---|---|
| Exam Name | BPSC DSO / Assistant Director Examination 2025 |
| Exam Stages | Prelims (Online CBT), Mains (Written), Interview |
| Exam Mode | Prelims – Online (Computer-Based), Mains – Offline (Written) |
| Question Type | Multiple Choice Questions (Objective Type) |
| Prelims Total Marks | 150 Marks |
| Mains Total Marks | 1000 Marks |
| Interview Marks | 120 Marks |
| Subjects Covered | General Awareness, English, Numerical Ability, Reasoning, Military Aptitude |
| Prelims Exam Duration | 2 Hours |
| Mains Exam Duration | 3 Hours |
| Marking Scheme | +1 for Correct Answer, -0.25 for Wrong Answer |
| Exam Language | Hindi and English |
BPSC DSO Selection Process
The Bihar District Selection Officer (DSO) selection process includes three stages:
- Preliminary Exam: A 2-hour objective test on General Studies (150 marks). Candidates must score minimum qualifying marks (e.g., 40% for General) to qualify. About ten times the vacancies advance to the Main Exam.
- Main Exam: Subjective exam with compulsory papers—General Hindi (100 marks, qualifying), General Studies I & II (300 marks each)—plus one optional subject (Economics, Mathematics, or Statistics, 300 marks). Minimum qualifying marks apply.
- Interview: Conducted for candidates who clear the Main Exam, carrying 120 marks. Approximately 2.5 times the vacancies are called.
The final merit list is based on the Main Exam and Interview scores combined.
BPSC District Selection Officer Salary
Selected candidates for the Bihar District Statistical Officer (DSO) post will receive a competitive salary ranging from ₹53,100 to ₹1,67,800 under Pay Level-9 as per the 7th Pay Commission. Along with the basic pay, they are entitled to several government-approved allowances and benefits, including:
- Dearness Allowance (DA)
- House Rent Allowance (HRA)
- Travel Allowance (TA)
- Other perks and incentives as per Bihar government norms
The salary structure and additional benefits make the Bihar DSO position a highly rewarding government job opportunity in 2025.


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