Bihar Technical Service Commission has released a cluster of Laboratory Assistant recruitment advertisements for 2026 under Advertisement Nos. 02/2026 to 13/2026. Together, these notifications cover 1091 regular Laboratory Assistant posts across science and technical streams such as Science, Electrical Engineering, Mechanical Engineering, Civil or Rural Engineering, Computer Science or IT, Electronics, Textile, Chemical, Printing, Ceramics, Automobile Engineering or Mechanical Diesel, and Agriculture Machinery. The official BTSC recruitment page shows that online registration started on 06 April 2026 and will remain open till 06 May 2026.

This recruitment is being conducted through separate discipline-wise advertisements, but the application schedule, pay level and broad selection framework are common across the series. Most engineering stream posts require a three-year diploma in the relevant discipline, while the Science stream requires a B.Sc. The commission has also specified a computer-based written test, experience weightage for eligible contractual service in specified institutions, online fee payment, category-wise reservation rules for Bihar domicile candidates, and document verification after the written stage.

Recruitment overview

BTSC has published a combined 2026 Laboratory Assistant recruitment cycle through 12 separate discipline-wise advertisements. All posts are regular appointments under the Science, Technology and Technical Education Department, Bihar.

The official recruitment page confirms that all 12 Laboratory Assistant advertisements are live together and share the same online application window from 06 April 2026 to 06 May 2026. Candidates should apply only under the discipline that matches their qualification.

Discipline-wise vacancy breakup

Advertisement No.DisciplineTotal Posts
13/2026Laboratory Assistant (Agriculture Machinery)1
12/2026Laboratory Assistant (Science)164
11/2026Laboratory Assistant (Mechanical Engineering)166
10/2026Laboratory Assistant (Civil Engineering / Rural Engineering)166
09/2026Laboratory Assistant (Computer Science and Engineering / Information Technology)252
08/2026Laboratory Assistant (Ceramics Engineering)2
07/2026Laboratory Assistant (Printing Engineering)2
06/2026Laboratory Assistant (Chemical Engineering)2
05/2026Laboratory Assistant (Electronics Engineering / Electronics Communication)146
04/2026Laboratory Assistant (Electrical Engineering)166
03/2026Laboratory Assistant (Textile Engineering)20
02/2026Laboratory Assistant (Automobile Engineering and Mechanical Diesel)4
TotalAll disciplines combined1091

The official PDFs also provide category-wise reservation breakup for each discipline, including horizontal reservation for Bihar resident women and benchmark disability categories wherever applicable.

Post, pay level and qualification pattern

Across all advertisements, the post name is Laboratory Assistant and the pay level is Level-6 with entry pay of Rs. 35,400. The qualification pattern differs by discipline.

Stream TypeQualification Pattern
Engineering and technical streamsThree-year diploma in the relevant discipline from an AICTE-recognized institution or equivalent regular course from a recognized university
Science streamBachelor of Science with Physics, Chemistry or Mathematics from a recognized university

For diploma-based streams, the relevant subject must match the discipline named in the advertisement. Candidates should not assume cross-eligibility between branches unless the notice specifically includes that branch.

Eligibility details by stream

The official advertisements divide the eligibility in a straightforward way. Science candidates need a B.Sc. with Physics, Chemistry or Mathematics. Engineering stream candidates need a three-year diploma in the matching branch.

The main diploma-based branches listed in the official notifications are Agriculture Machinery, Mechanical Engineering, Civil Engineering or Rural Engineering, Computer Science and Engineering or Information Technology, Ceramics Engineering, Printing Engineering, Chemical Engineering, Electronics Engineering or Electronics Communication, Electrical Engineering, Textile Engineering, and Automobile Engineering or Mechanical Diesel. Candidates should carefully match both degree name and discipline name before applying.

Age limit and relaxation rules

The age is to be calculated as on 01 August 2026. For most engineering and diploma-based Laboratory Assistant posts, the minimum age is 18 years. For Laboratory Assistant (Science), the minimum age is 21 years.

The maximum age shown in the official notices is 37 years for unreserved candidates, 40 years for unreserved women, 40 years for BC and EBC candidates, and 42 years for SC and ST candidates. Persons with benchmark disabilities are allowed an additional 10 years relaxation. The notices also mention relaxation for certain Bihar government employees with continuous service and special treatment for eligible contractual service cases under the department rules.

Reservation and Bihar domicile rules

The official advertisements make it clear that reservation benefits are available only to candidates who are permanent residents of Bihar. Candidates from outside Bihar can apply, but they are not entitled to reservation benefits under the state quota rules.

The notices also require category-specific certificates such as caste certificate, non-creamy layer certificate for BC or EBC, EWS certificate, domicile certificate, and disability certificate where applicable. Horizontal reservation for Bihar resident women is included within the roster shown in the advertisement tables.

Application fee and online payment

The official BTSC Laboratory Assistant advertisements prescribe a single examination fee of Rs. 100 for each candidate. Online bank charges are extra and are to be borne by the applicant.

The fee has to be paid through online mode only using options such as debit card, credit card, internet banking or UPI. The commission has also stated that candidates should keep a copy of the payment receipt safely for future use.

Selection process

BTSC will prepare merit on the basis of a written competitive examination and admissible work-experience weightage. The official notice assigns 75 marks to the written examination component and up to 25 marks to eligible work experience in the specified institutions or establishments.

Experience weightage is not universal for all applicants. It is tied to relevant contractual service under the Science, Technology and Technical Education Department, Bihar, or the specified government and local body institutions mentioned in the notice. Only candidates who qualify the written test are taken forward for the next stage, which includes document verification.

Written exam pattern and qualifying marks

The written competitive examination will be conducted as a computer-based test. The official notice states that the question paper will contain 100 multiple-choice objective questions, the exam duration will be 2 hours, and the paper will be available in both Hindi and English.

Each correct answer carries 1 mark and each wrong answer attracts negative marking of 0.25 marks. The commission has also prescribed minimum qualifying marks in the written test: 40 percent for general category, 36.5 percent for BC, 34 percent for EBC, and 32 percent for SC, ST, women and persons with disabilities. The detailed syllabus is to be published separately on the BTSC website.

How to apply online

  1. Visit the official BTSC recruitment page.
  2. Choose the Laboratory Assistant advertisement that matches your discipline.
  3. Open the official apply online link on the BTSC portal.
  4. Complete registration with your own active mobile number and email ID.
  5. Fill the online application carefully and select the correct category and reservation claims.
  6. Upload the required certificates, photograph and other documents in the prescribed format.
  7. Pay the examination fee online.
  8. Submit the application before 06 May 2026 and keep the application copy and payment receipt safely.

The commission has specifically warned that information entered online cannot be changed later in the regular course, so candidates should check all details before final submission.

Documents required and key instructions

The official notice lists the main documents candidates are expected to upload and later produce in original during verification. These include matriculation certificate for date of birth, relevant diploma or B.Sc marksheets and certificates, caste or EWS certificate where applicable, domicile certificate, disability certificate, and work-experience certificate in the prescribed format if experience benefit is claimed.

The commission has also stated that only those documents whose details are entered in the online application and uploaded within the prescribed columns will be considered. Candidates should regularly monitor the official website for further updates because the commission is not bound to issue separate SMS or email alerts for every stage.

Frequently Asked Questions

How many vacancies are available in Bihar BTSC Laboratory Assistant Recruitment 2026?

There are 1091 Laboratory Assistant vacancies across 12 separate discipline-wise advertisements.

What are the BTSC Laboratory Assistant 2026 application dates?

Online applications started on 06 April 2026 and the last date to apply and pay the fee is 06 May 2026.

What is the pay level for BTSC Laboratory Assistant posts?

All advertised Laboratory Assistant posts are in Level-6 with entry pay of Rs. 35,400.

What qualification is required for Bihar BTSC Laboratory Assistant Recruitment 2026?

Science posts require a B.Sc. with Physics, Chemistry or Mathematics, while the engineering and technical streams require a three-year diploma in the relevant discipline.

What is the application fee for BTSC Laboratory Assistant Recruitment 2026?

The official examination fee is Rs. 100 for each candidate, plus online bank charges.

What is the selection process for Bihar BTSC Laboratory Assistant 2026?

Selection is based on a computer-based written examination, admissible experience weightage where applicable, and document verification.

Is there negative marking in the BTSC Laboratory Assistant written exam?

Yes. Each wrong answer carries negative marking of 0.25 marks.

Are reservation benefits available to candidates from outside Bihar?

No. The official notices state that reservation benefits are available only to permanent residents of Bihar.

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