About Workplace Mental Health
If you lead an organisation in 2026, you have almost certainly heard the term ISO 45003. It turns up in board papers, tender documents and wellbeing strategies, often without anyone pausing to explain what it is. So let me do that plainly. ISO 45003, the global standard for psychological health and safety at work, sets out how to manage the psychosocial risks that affect people’s mental health on the job. I sat on the panel that drafted it, and I want to cut through the jargon and tell you what it actually asks of you.
What ISO 45003 actually is
ISO 45003 is the world’s first international standard dedicated to psychological health and safety at work. It was published in 2021 and sits alongside ISO 45001, the standard for occupational health and safety management. Where 45001 covers physical safety, 45003 turns the same disciplined approach onto the mind. It is a guidance standard rather than a requirements standard, which means you do not get a simple pass or fail certificate against it in the way you might for some standards. Instead it gives you a framework for spotting psychosocial hazards, assessing the risk they carry, and doing something about them. The point is not paperwork. The point is that the way work is designed and managed can either protect people or quietly harm them, and ISO 45003 helps you tell the difference.
What psychosocial risk means in practice
The phrase “psychosocial risk” sounds clinical, so here is what it covers in real terms. It is the parts of work that affect mental health: workload and deadlines, how much control people have over their day, the quality of support from managers and colleagues, the clarity of roles, how change is handled, and whether bullying, harassment or unfairness are tolerated. These are not feelings. They are recognised hazards with a strong evidence base, and the Health and Safety Executive’s latest figures show why they matter. In 2024/25, 964,000 workers reported work-related stress, depression or anxiety, and 22.1 million working days were lost to it, accounting for more than half of all work-related ill health. Treat those hazards seriously and the numbers move. Ignore them and no wellbeing app will save you.
What ISO 45003 asks an organisation to do
At its heart the standard asks you to manage psychological health the way you already manage physical safety. That means leadership taking visible responsibility rather than delegating mental health to an HR campaign. It means identifying the psychosocial hazards in your particular workplace, assessing who is exposed and how seriously, and putting proportionate controls in place. It means involving workers, because the people doing the job usually know where the pressure sits. And it means monitoring whether what you have changed is actually working, then adjusting. If that sounds like ordinary good management, that is rather the point. ISO 45003 is not asking you to become a clinic. It is asking you to design work that does not make people unwell, and to support those who are struggling when they do.
Can you get certified to ISO 45003?
This is the question I am asked most. Because ISO 45003 is a guidance standard, there is no formal certificate in the way there is for ISO 45001. What you can do, and what serious organisations are now doing, is assess your practices against the standard, close the gaps, and demonstrate conformance, often as part of a broader ISO 45001 management system and with support from a certification body. The honest answer is that the value sits in the alignment, not the badge. A gap analysis against ISO 45003 tells you where your real exposures are and gives you a roadmap to fix them. You can read more about how that works on our ISO 45003 gap analysis page.
Where most organisations get stuck
In my experience the sticking point is rarely intent. Most leaders want to do right by their people. The problem is that they jump to solutions, resilience training, an app, an awareness week, before they have understood the hazards in front of them. It is the equivalent of handing out painkillers without asking what is causing the pain. ISO 45003 forces the more useful sequence: understand first, then act, then check. That is also why it pairs naturally with other work. For organisations in higher-risk sectors it sits comfortably alongside BS 30480, the British Standard for suicide prevention in the workplace, and a sound mental health strategy. If you want to see what acting on the causes looks like in practice, our post on what real interventions into workplace mental health look like is a good companion to this one.
ISO 45003 frequently asked questions
Is ISO 45003 a legal requirement?
No. ISO 45003 is voluntary guidance, not law. But it reflects what good practice looks like, and in Great Britain employers already have a legal duty under health and safety law to assess and manage risks to health, including psychological health. Aligning with ISO 45003 is one of the clearest ways to show you are meeting that duty.
How long does ISO 45003 alignment take?
It depends on your starting point and your size, but a typical journey begins with a gap analysis over a few weeks, followed by several months of implementing changes and embedding them. It is ongoing rather than a one-off project, because work and risk keep changing.
Moving from policy to practice
If you are weighing up ISO 45003 and want an honest view of where your organisation really stands, that is exactly the conversation I am happy to have. A gap analysis is usually the most useful first step. You can read more about our ISO 45003 work or get in touch at being-real.co.uk.
About Peter Kelly and Being Real
Peter Kelly is an organisational psychologist with a quarter of a century at the Health and Safety Executive, where he shaped national policy on work-related stress and helped build the UK’s management standards approach. He sat on the drafting panel for ISO 45003, the global standard for psychological health and safety at work. Being Real helps organisations move from policy to practice on workplace mental health. To talk to Peter, visit being-real.co.uk.