ISO 45001 and ISO 45003: What Every Manager Needs to Know About Psychological Health and Safety at Work
If you manage people, you’ll likely be familiar with ISO 45001:2018 Occupational Health and Safety Management System (OHSMS). ISO 45001 is the international standard that gives organisations a clear framework to reduce workplace risks and improve health and safety at work. This standard applies to any organisational size or industry, and helps you build a healthy workplace by identifying hazards, assessing risks, and implementing controls to prevent work-related injuries and illnesses.
You don’t need a certification to implement ISO 45001, though third-party certification is available if you want external assurance. What the standard does expect is that people are trained in relevant health and safety matters. Providing this training not only supports the system; it also helps you meet legal duties to protect employees’ welfare and manage health and safety at work. In short: ISO 45001 offers the structure; training ensures it works day to day.
Table of Contents
What is ISO 45003?
ISO 45003 is the international standard that provides practical guidance on managing psychological health and safety at work. It sets out recommendations for tackling work-related stressors such as workload, job demands, role clarity, relationships and the wider work environment. ISO 45003 was developed to complement ISO 45001, adding specific guidance on the psychological aspects of your organisation’s Occupational Health and Safety Management System. Think of 45001 as the overall safety system, and 45003 as the detailed playbook for psychosocial risk.
How Can ISO 45003 Benefit My Company?
ISO 45003 helps organisations cover and manage psychosocial risks while they meet ISO 45001’s requirements. The case for action is convincing. In 2024/25, there were an estimated 964,000 workers experiencing work-related stress, depression or anxiety in Great Britain. (Work-related stress, depression or anxiety statistics in Great Britain, 2025). These mental health problems accounted for 22.1 million lost working days, with people taking 22.9 days off on average when affected (Health and Safety Statistics 2024/2025).
When psychosocial risks are left unaddressed, organisations typically see:
- Higher staff turnover, pushing up recruitment and training costs.
- Increased costs due to work absences linked to stress and related conditions.
- Reduced quality, in the service or product, as attention slips and errors increase.
- More investigations into accidents, incidents and staff turnover.
- Litigation and tribunal exposure, with associated costs.
- Reputation damage, as responsible practices now are becoming more relevant for branding and talent attraction.
Just as physical health is relevant and it can drive incidents, mental health and psychological health and safety at work is very relevant, as it can lead to avoidable costs and missed opportunities. Psychological health influences retention, morale and productivity; it is a strategic issue, not only a “nice to have”.
No matter the size or industry of your organisation, both the ISO 45001 and ISO 45003 is relevant to all employers wanting a consistent, evidence-based approach to health and safety at work, and more specifically psychological health and safety at work
Uses and Benefits of Psychological Health and Safety at Work
- Manage effectively mental health risks: take a comprehensive, system-level approach to psychological health and safety.
- Improve recruitment, retention and diversity: create a working environment that is positive, fair and supportive. A place where people would like to start working or where talent will want to stay.
- Strengthen business resilience: reduce sick leave linked to stress, burnout, anxiety and depression.
- Enhance engagement, innovation, performance and productivity: show visible commitment to your workers’ physical and psychological health.
- Support legal compliance: meet your obligations as an employer by managing predictable psychosocial risks.
How Can I Start Applying It?
1) Get familiar with the standard
Read ISO 45003 alongside your ISO 45001 documentation. If needed, take focused training so managers understand psychosocial hazards and the controls that fit your context.
2) Map where you are now
Review your current policies, procedures and data (e.g., absence, turnover, exit feedback, survey results). For each clause or recommendation, note what’s in place, what’s partially in place, and where the gaps are.
3) Prioritise the gaps
Identify the few changes that would make the biggest difference (e.g., clearer role definitions, workload planning, meeting hygiene, fair reporting routes). Choose measurable outcomes (e.g., fewer after-hours emails, faster decision turnaround, lower rework).
4) Make a simple plan
Agree actions, owners and timeframes. Communicate what will change, train the right people, and build small check-ins (e.g., monthly) to track progress and adjust.
5) Keep it live
Integrate psychosocial risk reviews and psychosocial risk scans into your yearly routine. This way, improvements stick, and new risks are noticed earlier.
Can You Get Certified For ISO 45003?
ISO 45003 provides guidelines for psychological health and safety at work, not requirements. That means it is not certifiable in the same way as 45001 or other management system standards. However, some providers offer courses, recognition or verification for organisations working to meet the guidance. Whether or not you seek recognition, the value lies in applying the guidance to your existing OHSMS so you can manage psychosocial risks consistently.
As a Brief Summary
- ISO 45001 gives you the framework to manage all health and safety at work.
- ISO 45003 adds the practical detail for psychological health and safety at work.
- Together they help you reduce staff turnover, improve quality and performance, and meet your legal duty of ensuring employee’s welfare and managing health and safety risks in the workplace.
At Clement Mind, our occupational psychologists will support you as an individual, and also your team or organisation to improve your psychological safety at work. Contact us yo get help and follow us for more topics!
