Mental Health in the Workplace: Why It Matters and How Organisations Can Respond

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Mental health in the workplace has moved from being a “nice to have” wellbeing topic to a core business priority. Organisations that ignore employee mental health often experience higher absence rates, lower productivity, increased staff turnover and reduced morale.

By contrast, workplaces that actively support wellbeing tend to build stronger engagement, resilience and performance. These outcomes are exemplified by the now famous case of Alcoa, an American aluminium manufacturer. Here’s a summary of the story.

When Paul O'Neill was appointed CEO in 1987, he made a wildly controversial pledge: to put employee safety before all else. To be clear, O'Neill's goal wasn't simply to reduce the number of workplace injuries, it also included cultivating an atmosphere of respect and value. In corporate America nothing matters more than increasing market capitalisation. The bigger the bottom line, the bigger the return for investors. Focusing on anything but this was tantamount to heresy. However, O'Neill understood that a company is only as strong as its staff.

(As an aside, when Charles Duhigg recounts this story in his book, The Power of Habits, he comically notes that, when word got out that a 'crazy hippie was in charge', some Alcoa shareholders started selling stock in the belief that he was going to 'kill the company.')

But there was method in O’Neil’s madness. Numerous studies outlined in Amy Edmondson's award-winning book, Right Kind of Wrong, show that when workers feel respected and valued, they are less likely to take days off and more likely to adhere to safety protocols and quality standards.

And this is exactly what happened in the case of Alcoa. In his 15 years at the helm, O'Neill not only succeeded in reducing the number of staff injuries. He also transformed Alcoa into a corporation that genuinely cared about the wellbeing of its workers. But what about the company’s market capitalisation? Well, those shareholders who jumped ship came to regret their decision. When the crazy hippie retired in 2000, Alcoa’s net income had grown five times. Duhigg calculates that had you invested one million in Alcoa stock when O’Neil took over, it would have been worth five million when he retired.

As this case study illustrates, for employers, HR leaders and managers, the challenge is no longer whether to act, but how to create a psychologically healthy workplace that supports people and business outcomes alike.

What is mental health in the workplace?

Workplace mental health refers to the psychological wellbeing of employees within their working environment. It includes how people think, feel and function at work, and how workplace factors influence stress, anxiety, motivation, confidence and overall wellbeing.

Mental health exists on a continuum. Employees do not need a diagnosed condition to struggle. Pressure, burnout, poor management, conflict, uncertainty or excessive workload can all negatively affect wellbeing. Likewise, supportive leadership, autonomy, recognition and healthy relationships can strengthen it (Gov.UK: Mental health conditions, work and the workplace).

Why mental health in the workplace matters

The human case is clear: people deserve to work in environments that support, rather than damage, their wellbeing. The commercial case is equally compelling.

In the UK, an estimated 875,000 workers experienced work-related stress, depression, or anxiety in 2022/23, leading to 17.1 million working days lost. Poor mental wellbeing is also estimated to cost UK employers between £42–£45 billion each year through presenteeism, sickness absence, and staff turnover (Mental Health Foundation).

These figures demonstrate the direct cost of poor workplace mental health. Less visible, however, are the wider indirect consequences. Research consistently shows that mood and morale are contagious within organisations. When employees are struggling mentally – particularly when they believe their workplace is contributing to their distress – this dissatisfaction often spreads to colleagues, undermining morale, engagement and ultimately productivity.

The effects can intensify further when employees take sick leave. Their responsibilities are frequently redistributed among remaining team members, increasing workloads and placing additional pressure on colleagues. Over time, this can create a cycle of stress, burnout and declining performance across teams.

The message is clear: when employee mental health deteriorates, organisations bear the cost – both human and financial.

Common causes of poor mental health at work

Although every workplace is different, several factors are consistently linked to declining employee wellbeing. What follows is a brief outline of some of the most prevalent workplace contributors to poor mental health.

1. Excessive workload

Unmanageable workloads, unrealistic deadlines and constant pressure can lead to chronic stress and eventual occupational burnout. When high demand becomes the norm rather than a short-term peak, risk increases significantly.

2. Poor management practices

Managers shape the daily employee experience. Besides the overt and inexcusable practice of bullying, marginalising and pressurising, managers can also adversely impact staff mental health through less obvious practices. For instance, a lack of feedback, unclear expectations, micromanagement or inconsistent behaviour can create anxiety and disengagement.

3. Low control and autonomy

Self-determination theory strongly emphasises the importance of autonomy: the capacity and freedom to make decisions. Employees generally cope better when they have some ownership and influence over how work is completed. Highly rigid environments with little flexibility can reduce motivation and increase stress.

4. Toxic workplace culture

Bullying, discrimination, exclusion or fear-based leadership damages what Amy Edmondson calls 'psychological safety.' She warns us that, where psychological safety is in short supply, employees are more likely to hide problems until they escalate.

5. Job insecurity and organisational change

Restructures, redundancies and uncertainty often increase anxiety levels, especially when communication is poor or inconsistent.

6. Blurred work-life boundaries

Always-on communication, blurred hybrid working boundaries and expectations of constant availability can prevent recovery and increase fatigue.

Signs an employee may be struggling

Managers are not therapists, but they should possess a strong understanding of practices that can undermine the mental wellbeing of their staff. In addition, they should also be trained to recognise potential warning signs.

These may include:

• Increased absence or lateness

• Reduced concentration or performance

• Irritability or withdrawal

• Changes in mood or motivation

• Missed deadlines

• Increased conflict with colleagues

• Visible fatigue

• Presenteeism (being at work but functioning below capacity – sometimes referred to as ‘quiet quitting’)

These signs do not automatically indicate a mental health issue, but they should prompt a supportive conversation.

The role of leadership in workplace wellbeing

As the case study of Alcoa clear demonstrated, culture starts at the very top. Senior leaders influence whether mental health is treated as a genuine priority or a superficial campaign.

Healthy leadership practices include:

• Speaking openly about wellbeing

• Modelling healthy boundaries

• Investing in manager training

• Measuring workload and culture risks

• Acting on employee feedback

• Prioritising sustainable performance over constant urgency

Employees notice the gap between what leaders say and what they do. Credibility is all important. Thus, when senior leaders embark on a camping to improve staff wellbeing, it is imperative that the initiative is sincere and not just another instance of ‘mental health washing.’

How managers can support mental health at work

Line managers are often the most influential factor in an employee’s day-to-day experience. Thus, it is them who need to take staff mental wellbeing most seriously.

The good news is that cultivating an environment that supports mental health is comparatively inexpensive. Promoting staff satisfaction rarely requires grand initiatives or costly interventions.

Generally, just being human will do. Here’s how to add that human touch to the workplace:

Regular check-ins

Frequent one-to-ones help identify issues early. Conversations should include wellbeing, not only targets and tasks.

Active listening

Employees do not always need solutions immediately. They often need to feel heard, understood and taken seriously. In his book, How to Listen with Intention, Patrick King reminds us that when actively listening, it is essential that the person is not interrupted and that they are provided with the listener's undivided attention. Thus, phones must be turned off!

Reasonable adjustments

Simple changes such as flexible hours, altered workload, remote working options or quieter workspaces can make a significant difference.

Clear priorities

When everything feels urgent, stress rises. Managers should help staff by making priorities explicitly clear and, where possible, removing unnecessary pressure.

Signposting support

Managers should know how to refer employees to internal or external support such as occupational health, employee assistance programmes or counselling services.

Practical strategies for improving mental health in the workplace

Improving mental health in the workplace requires systems, not one-off gestures. Free fruit, yoga sessions or awareness days can be positive additions, but they do not replace structural change.

O’Neil didn’t waste time with fads or quick fixes. He set about reforming Alcoa’s culture by actively engaging his staff. He would regularly visit the ‘shop floor’ and, equipped with a notebook, wrote down suggestions from staff members. He also encouraged staff to email their thoughts and opinions on how to improve working conditions. These simple methods made workers feel valued and heard.

Here are a range of other effective methods:

1. Conduct stress risk assessments

Assess psychosocial risks such as workload, role clarity, relationships, control and organisational change.

2. Train managers

Equip managers to hold wellbeing conversations, recognise early signs of distress and respond appropriately.

3. Review workload design

Examine staffing levels, unrealistic KPIs, meeting overload and inefficient processes.

4. Build psychological safety

Encourage respectful challenge, learning from mistakes and open communication without fear of punishment.

5. Offer accessible support

Provide confidential and easy-to-access mental health support services.

6. Measure and improve

Use surveys, absence data, turnover data and feedback to identify trends and refine strategy.

Remote and hybrid working considerations

Hybrid working has created benefits for many employees, including flexibility and reduced commuting stress. However, it can also introduce new risks:

• Isolation and loneliness

• Difficulty switching off

• Digital fatigue

• Reduced team connection

• Inequality between remote and office-based staff

Employers should not assume flexibility automatically solves wellbeing challenges. Hybrid models still require intentional management, communication and inclusion.

Reducing stigma around mental health

Many employees still fear being judged, overlooked or seen as weak if they disclose mental health difficulties. Reducing stigma requires consistent action:

• Use respectful, non-judgemental language

• Encourage open discussion

• Train leaders and managers

• Protect confidentiality

• Respond supportively when concerns are raised

• Celebrate help-seeking as strength, not failure

A culture of silence can be costly. Early conversations often prevent later crises.

Legal and ethical responsibilities

In the UK, employers have duties relating to employee health, safety and, where relevant, disability discrimination protections. Mental health should be treated with the same seriousness as physical health. Where workplace factors create harm, organisations are expected to assess risks and take reasonable steps to reduce them.

Beyond legal compliance lies an ethical question: what kind of employer does the organisation want to be?

A simple way to answer that question and to assess the working conditions of your organisation is to ask: how would I feel as a worker in my organisation? Would I be happy with a loved one working in these conditions?

The future of mental health in the workplace

Forward-thinking organisations are shifting from reactive support to preventative design. This means embedding wellbeing into leadership, workload planning, culture, systems and people strategy rather than relying solely on crisis interventions or, worse still, ignoring the issue entirely.

The most effective organisations understand that mental health is not separate from performance. As Alcoa has shown, it is one of the conditions that makes sustainable performance possible.

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Final thoughts

Mental health in the workplace is everyone’s business, but responsibility is not equal. While employees can use coping strategies and seek support, organisations must create environments where people can thrive.

The evidence is clear: when businesses invest in psychological wellbeing, they often see stronger engagement, lower absence, better retention and healthier cultures. Supporting mental health at work is not a soft issue. It is smart leadership.

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References

Health and Safety Executive (HSE). Mental health conditions, work and the workplace. (HSE)

Health and Safety Executive (HSE). Stress and mental health at work. (HSE)

Mental Health Foundation. Mental health at work: statistics. (Mental Health Foundation)

National Institute for Health and Care Excellence (NICE). Mental wellbeing at work (NG212). (NCBI)

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About Dr Laura Allen –

A Chartered Psychologist & Integrative Therapist, Dr Allen specialises in a broad range of therapeutic methods. She is a published author of numerous research papers and Interactive Courses in the field of Psychology. Dr Allen works one-to-one with clients and supervises other practitioners. She is also a proud member of the British Psychological Society assessment team supporting psychologists in training.