Causes of Workplace Stress: What Every Employer Needs to Know
Workplace stress has two broad sets of causes, and employers should pay attention to both. The first is the work itself: excessive demands, low control, poor support, unclear roles, badly managed change, and workplace conflict. The second is the person: thinking habits, coping skills and capacity to tolerate distress differ enormously from one individual to the next - and those differences are real, influential, and, fortunately, trainable.
Australian WHS law now makes the first set, the psychosocial hazards, squarely the employer’s responsibility. This article walks through those workplace causes of stress, how they combine, and where individual skills fit into the picture.
The most important thing to understand about stress at work
Stress follows a simple equation: it occurs when the demands on a person chronically exceed the resources they have to meet them, such as time, energy, skills, support, control, and recovery.
Both sides of that equation are real. Demands, control, support and clarity are set by how work is designed and managed. Resources include time and staffing, but they also include the person’s psychological skills: healthy thinking, emotional self-management, distress tolerance, and self-compassion (among others). Two employees under identical conditions are likely to respond differently, because they bring different resources.
A practical rule of thumb: when one person is struggling, look at both the person and their conditions. When many people in the same team show strain, look hard at the conditions - the common factor usually isn’t related to one person.
One caution, though: “hire more resilient people” is not, on its own, a stress strategy. Psychological skills are real and teachable (building them is precisely what we do) but even skilled, resilient people will be ground down by work that reliably generates more demands than the resources at their disposal. The design of the work and the skills of the people are partners, not substitutes.
The seven most common causes of stress at the workplace
1. Excessive job demands
The most familiar stressor: too much work, too little time, sustained for too long. But demands aren’t only about volume - emotional demands (difficult customers, distressed clients), cognitive demands (constant vigilance), and even chronically low demands (boredom, underuse of skills) all take a toll. The common thread is a mismatch that never lets up.
2. Low job control
People tolerate high demands far better when they have a say in how, when and where they do their work. Strip away that control (think rigid processes, micromanagement, no input into decisions that affect them) and the same workload becomes considerably more harmful. Decades of research point to the demand-control combination as the classic recipe for job strain.
3. Poor support
Support from supervisors and colleagues is a genuine buffer against stress. Where it’s missing - absent managers, siloed teams, nobody to ask for help - every other stressor hits harder. Support isn’t a soft extra; it’s load bearing. Feeling supported also creates ‘psychological safety’ – the condition in which people feel they can take interpersonal risks such as provide feedback, report concerns, share ideas, and be themselves. This single factor – feeling supported – is a ‘master factor’ in stress at work, because it opens up the ability for staff to communicate how they feel and to garner the resources or help they need.
4. Role confusion
Unclear expectations, conflicting priorities, and responsibility without authority. When people don’t know what success looks like, or answer to competing masters, they carry a constant background hum of uncertainty - and uncertainty is exhausting.
5. Poorly managed change
Restructures, new systems, new leadership. Change itself isn’t the problem, change handled badly is: no consultation, poor communication, long periods of ambiguity about people’s futures. The rumour mill fills every information vacuum, and it rarely fills it with good news.
6. Conflict, bullying and harassment
Poor workplace relationships are among the most damaging stressors of all, and bullying is the most serious form. Beyond the direct harm to targets, unresolved conflict poisons the surrounding team because people spend their energy on self-protection instead of work.
7. Effort–reward imbalance
High effort met with low reward (little recognition, stalled progression, job insecurity, or pay that doesn’t reflect the load) is another notable stressor. People can sustain remarkable effort when it’s seen and valued. Effort into a void is a slow leak in anyone’s tank.
Stressors multiply — they don’t just add up
Here’s what a checklist view of stress misses: these causes interact. High demands alone can be manageable. High demands with low control produce strain. Add poor support and role confusion, and you have the conditions from which psychological injury claims are made.
That’s why fixing workplace stress means looking at the pattern, not merely hunting a single culprit. It’s also why one-off gestures - a gym pass here, a fruit bowl there - so often disappoint: they neither change the conditions nor genuinely build anyone’s skills. Both take sustained, deliberate work.
These causes now carry legal weight
Every stressor listed above is recognised in Australian WHS law as a psychosocial hazard, and employers have a positive duty to identify, assess and control them at the source in the same way you’d manage a physical hazard. Codes of practice set out exactly how, and in some states they now operate as enforceable compliance benchmarks. We’ve written a plain-English walkthrough of the code of practice covering what’s required.
The practical upshot: understanding the causes of stress in your workplace is no longer just good management. It’s evidence of due diligence.
What employers can do
Three moves matter most:
Ask, and listen. Consult your people about where the pressure comes from. The people doing the work can name their stressors with startling precision - most have simply never been asked.
Fix the work, not just the worker. Workloads, control, clarity, change management - the causes of these stressors are design problems, and design problems have solutions.
Build psychological skills alongside. Once the conditions are addressed, evidence-based skills training multiplies the benefit — people handle the pressure that remains, and managers respond earlier and better. Our manager’s guide to workplace stress covers the day-to-day version of this.
Frequently asked questions
What is the number one cause of stress in the workplace?
It depends on what you measure. As a day-to-day experience, excessive job demands are the most familiar and widespread stressor. But in Australian workers' compensation claims data, the ranking has shifted: work-related harassment and bullying is now the single largest cause of mental stress claims, with work pressure second. Either way, causes rarely act alone — demands become most harmful combined with low control and poor support, and how each person appraises and copes with pressure shapes the impact too. The pattern matters more than any single cause.
Can a job cause stress even when the workload is reasonable?
Yes. Role confusion, lack of control, poor support, unresolved conflict and effort without recognition all cause significant stress independent of workload. Some of the most stressed people in any organisation have perfectly manageable task lists and utterly unmanageable conditions around them.
Are employers legally responsible for workplace stress?
Employers are legally responsible for managing the hazards that cause it. Under Australian WHS law, the stressors described above are psychosocial hazards, and organisations must identify, assess and control them so far as is reasonably practicable, with officers carrying personal due diligence duties.
What’s the difference between a stressor and stress?
A stressor is the cause - the workplace condition creating pressure, like unrelenting demands or role confusion. Stress is the effect - the person’s psychological and physical response. Employers control the stressors; that’s where prevention lives, and it’s far cheaper than managing the consequences.
Find the causes before they find you
Workplace stress is not mysterious. Its causes are known, they show up in predictable patterns, and every one of them can be addressed. If you’d like help doing that properly, from identifying your organisation’s specific stressors to building the skills that keep pressure productive, explore our workplace programs or get in touch. Prevention beats repair, every time.
