New NEBOSH IDIP Syllabus and Old Syllabus

The NEBOSH International Diploma for Occupational Health and Safety Management Professionals (IDIP) is a new qualification that has been launched by the NEBOSH in April 2021, substituting the NEBOSH International Diploma in Occupational Health and Safety.

The old syllabus will continue until the year 2026, allowing five years for the existing learners to complete their qualification.

The NEBOSH International Diploma for Occupational Health and Safety Management Professionals is designed for students who want to advance their careers in HSE management as "Safety Professionals."


Differences between November 2015 and July 2020 specifications

The biggest changes to the specifications are:

  • The amount of time spent on teaching has been reduced by 14%. As a result, a classroom course that formerly took 35 days to complete can now be completed in only 30 days.
  • Content from the November 2015 specification that is also part of the National or International General Certificate in Occupational Health and Safety is now classed as 'prior learning' andremoved from the July 2020 specification.
  • Instead of four assessments, now there are three.
  • All assessments can be completed remotely, which means, the learners are not required to attend an invigilated examination venue.

A New Syllabus Module for NEBOSH IDIP


Know – workplace health and safety principles (International)


Do – controlling workplace health issues (International)


Do – controlling workplace safety issues (International)

The employers depend on the NEBOSH Diploma qualification to support health and safety professionals gain the practical knowledge and skills they need to execute their jobs efficiently. The NEBOSH examines the syllabus on a regular basis in accordance with the normal qualification development cycle to ensure that the International Diploma remains fit for purpose. This change is the result of extensive research and wide consultation with important stakeholders like as Learning Partners, employers, Trade Unions and NEBOSH Alumni.

New Syllabus Summary vs Old Syllabus Summary


  • Unit IA: Managing health and safety
  • Unit IB: Hazardous Substances/ Agents
  • Unit IC: Workplace and work equipment safety
  • Unit DNI: Application of health and safety management in workplace


  • Unit ID1:Know – workplace health and safety principles (International)
  • Unit ID2: Do – controlling workplace health issues (International)
  • Unit ID3: Do – controlling workplace safety issues (International)
Study Hours


  • Unit IA: 86 hrs
  • Unit IB: 65 hrs
  • Unit IC: 70 hrs
  • Unit DNI: 5 hrs

Approximately 30 days


  • Unit ID1: 71 hrs
  • Unit ID2: 60 hrs
  • Unit ID3: 54 hrs

Approximately 30 days

Assessment Specifications of Old NEBOSH IDIP Syllabus

Unit IA, Unit IB and Unit IC: 3-hour Written Exam

  • The written exam consists of 11 questions split into Sections A & B
  • Section A comprises of 6 'short-answer' questions (10 marks each) – all questions are compulsory
  • Section B comprises of 5 'long-answer' questions (20 marks each) – the student answers 3 out of the 5 questions
  • There is a total of 120 marks available for the paper; the total mark for the paper (Section A + Section B) will then be converted to a percentage
  • The student scripts are marked by external examiners appointed by NEBOSH

Unit DNI: Written Assignment

  • The report should be nearly around 8000 words in total, excluding the references, bibliography and appendices. Reports with more than 8000 words will not be penalised, however students should try to keep their word count around 12000.
  • Submission dates for International Diploma assignments are in February, May, August and November each year
  • The assignments are marked by external examiners appointed by NEBOSH

Assessment Specifications of New NEBOSH IDIP Syllabus

The assessments focus on the application of skills and knowledge to help the learners prepare for health and safety issues faced in the workplace. Each assessment is significant; the way qualification units are assessed and the time period given to complete each assessment are as follows:

Unit ID1: 6 weeks (30 working days)

Assignment includes four parts –

  • Simulations
  • Workplace-based activities
  • Reflective tasks
  • Research project

Unit ID2: 4 weeks (20 working days)

Case study (simulation only)

Unit ID3: 4 weeks (20 working days)

Case study (simulation only)

Points to be noted

  • As the syllabus content and assessment format have changed, it WILL NOT be possible to transfer between specifications.
  • Students who wish to transfer, must enrol onto the new specification and take all unit assessments of this specification.
  • Students enrolled onto the 2015 specification have 5 years to complete the qualification till 2026.
  • All the qualifications gained under former specifications are still valid, since NEBOSH qualifications do not have any expiry dates.

If you require additional information, please contact us.

The learners who intend to complete the NEBOSH IDIP course and require additional information on the new syllabus content and assessment format may contact REDHAT SAFETY by calling us directly, filling out the available enquiry form on our website or sending us an email addressing your concerns.
We are always available to help you select the best safety course for you.
  • Qualification
    International Diploma for Occupational Health & Safety Management Professionals
  • Duration
    5 years
  • Training Mode
  • Board
  • Level
    Advance / Level 6
  • Language
  • Fees
  • Prerequisites
    None, however pursuing IGC would be an added advantage
  • Exam Type
    OBE - Remote Exam
  • Enroll Now

Preparation For IDIP Exam

In the following link, delegates preparing for IDIP exams can obtain useful information such as a syllabus guide, command word guidance, an example question paper and examiner feedback:

Click Here
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