Exam Format 

The exam is a three-hour fifteen minute computer-based exam. The exam is an integrated case study. Each exam will comprise of a series of exhibits of information and three tasks each containing several requirements:  

•    Task 1 will consist of requirements related to Syllabus Area B  
•    Task 2 will be focused on Syllabus Area C  
•    Task 3 will be based on Syllabus Area D   
 
The frameworks and regulations covered in Syllabus Area A are underpinning knowledge for the whole exam, but the ethics covered in Syllabus Area A will be specifically examined. Ten marks of the exam will be focused on ethics, and these will be split across any two of the three tasks. Therefore, the three tasks within the diploma assessment will be worth 30-35 marks each. 
 
The requirements within each of the three tasks will be a mix of computational and discursive activities. All requirements and tasks are compulsory. The overall pass mark for the Professional Diploma in Sustainability is 50%. 

Exam Preparation Course

This optional course has been developed by the examining team responsible for the Diploma qualification, and is tailored to support candidates preparing for the exam. It assumes that you have already completed the Sustainability Certificate Series or are familiar with the topics outlined in the Diploma Syllabus and Study Guide. 
 
It is included at no additional cost when you purchase either:

• The Sustainability Certificate Series

• An Exam Session

Duration: 10 hours 

Key dates and fees

In 2025/26, the exam sessions will take place on 25 November 2025 and 26 May 2026. For the November 2025 exam, the booking window will open in August and close on 27 October.

The examination fee is £300 per sitting for both members and non-members.