Published by  Morgane Hamon - Updated on   

The Hidden Costs of Overwork: Why HR and Businesses Must Address Mental Health

Burnout, presenteeism, and turnover are costing businesses more than they realise. Learn why mental health should be an HR priority.

Most HR leaders now recognise that mental health matters. Fewer have quantified what poor mental health is actually costing their business, and fewer still are addressing the hidden costs that never appear on a sick-leave report. 

Across Asia, 82% of employees report significant mental strain, with burnout rates reaching nearly 63% in parts of Southeast Asia. Globally, the World Health Organisation estimates that depression and anxiety cost the economy US$1 trillion each year in lost productivity. Yet mental health is still too often treated as a wellness initiative rather than what it truly is: a performance strategy. Organisations that recognise this shift will out-recruit, out-retain, and outperform those that don't. 

The productivity drain that often goes unnoticed 

The financial impact of poor mental health extends far beyond sick leave. The largest hidden cost is presenteeism, where employees are physically at work but unable to perform at their best because of stress, anxiety, or exhaustion. Research consistently shows presenteeism costs employers significantly more than absenteeism. Unlike absence, it is invisible in most HR dashboards, which is precisely what makes it so costly. 

Employees under chronic stress struggle with concentration, decision-making, creativity, and collaboration. Mistakes increase, projects slow down, and innovation stalls. In knowledge-based industries, even small individual declines compound quickly across teams. 

Burnout drives absenteeism and turnover 

When stress goes unaddressed, presenteeism eventually gives way to absenteeism, and absenteeism to attrition. Replacing an experienced employee typically costs between 50% and 200% of their annual salary once recruitment, onboarding, training, and lost productivity are factored in, and institutional knowledge and client relationships often leave with them. 

High turnover also compounds pressure on remaining employees, accelerating the same burnout cycle that caused the departures. Retaining experienced talent is almost always more cost-effective than continually recruiting replacements. 

Leadership and workplace culture matter 

Many factors shape mental health, but workplace culture is one of the few employers can directly influence. Unclear expectations, poor communication, limited flexibility, and lack of recognition all contribute to strain. Employees may also hesitate to raise concerns if they fear being perceived as less committed, allowing issues to worsen silently. 

The most effective interventions here are structural, not symbolic. Adjusting workload expectations, giving managers permission to protect team capacity, and ensuring that support is genuinely confidential often deliver more impact than awareness campaigns alone. 

Cultural context matters, especially in Asia 

Depending on your location, cultural dynamics also shape how mental health is experienced at work. In many parts of Asia, long working hours are normalised, hierarchical management styles can discourage upward feedback, and stigma around mental health remains significant. Employees may be far less likely to disclose stress through internal channels. For HR leaders operating across multiple markets, confidentiality and access to external professionals often make the difference between a programme that is used and one that exists only on paper. 

Mental health influences business performance 

Employee well-being and organisational performance are closely linked, and the WHO estimates that every US$1 invested in treatment for common mental disorders returns US$4 in improved health and productivity. Few workforce investments offer that kind of return. 

The organisations getting this right have shifted from crisis response to early intervention: regular manager check-ins focused on capacity as well as deliverables, realistic workload planning, flexible work arrangements where viable, and confidential access to qualified mental health professionals. Early support helps employees manage challenges before they escalate into absences, resignations, or long-term health issues, while strengthening workforce resilience and protecting long-term business performance. 

From insight to action 

For organisations ready to embed mental health support into their benefits strategy, APRIL International offers several solutions. 

Stress Management Counselling, part of its Employee Assistance Program (EAP), gives eligible members confidential access to licensed psychologists and counsellors. Delivered by external professionals, it makes support more accessible and helps reduce the stigma that often prevents employees from seeking help internally. For those needing more sustained care, APRIL International's mental health benefits also cover in-person treatment and sessions with qualified professionals, ensuring a continuum of support from early intervention through to ongoing clinical care. 

Mental health support is no longer optional, it is a defining feature of employers of choice. To explore how your benefits strategy compares to best practice in your region, speak with your broker or contact our corporate team at corporate.asia@april.com or +65 6320 9583

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