Work-related stress and your mental health: what the law actually protects

If work is making you unwell, you are not just expected to cope. The law gives you more than one way to push back, and which one applies depends on what has actually happened to you.

This guide sets out both routes plainly: what your employer owes you once they know something is wrong, and what happens when stress, anxiety or depression meets the legal test for disability. It draws on real tribunal decisions, including some where the claim failed, so you know what actually moves a case and what doesn’t.

Two routes into the law, not one

The first route doesn’t need a diagnosis. It comes from your employer’s basic duty of careA legal responsibility to take reasonable care to avoid causing someone harm. In an occupational health context, it matters because this duty is owed to your employer, not to you.. They have to act as soon as they know, or should know, you’re at risk of harm from stress. This goes back to Walker v Northumberland County Council, where a social services manager had a breakdown from workload, was promised things would change, went back, and broke down again when nothing did.

The second route needs your condition to meet the Equality Act’s test for disability: a mental or physical impairment with a substantial, long-term effect on your ability to do normal daily activities. “Long-term” generally means it has lasted, or is likely to last, 12 months. Depression and anxiety regularly meet this test. Once they do, a different set of protections opens up, including the right to reasonable adjustmentsChanges an employer must make under the Equality Act 2010 for a disabled employee, where without them the employee would be at a substantial disadvantage compared to non-disabled colleagues. What coun... and protection from being treated badly because of something connected to your condition.

Both routes can apply to the same situation, and often do.

What “on notice” actually looks like

Employers often argue they didn’t know. Courts have been consistently unimpressed by that argument once there’s a paper trail.

Hatton v Sutherland and Barber v Somerset County Council are the leading authorities here. Together they establish that your employer doesn’t need a formal complaint before the duty kicks in. A period of stress-related absence, a GP note, a previous breakdown, all of these can be enough to put them on notice. And once they are, they have an active obligation to check on you when you come back, not just wait for you to raise it again.

The same principle runs through Hone v Six Continents Retail. An employer who knows you’re working excessive hours can’t shelter behind the fact that you kept turning up anyway. Willingness to keep working through something isn’t the same as consent to be harmed by it.

Why counselling on its own doesn’t fix it

An Employee Assistance Programme, a few counselling sessions, a wellbeing helpline: none of these discharge your employer’s duty if the actual cause of the harm is still there.

Dickens v O2 makes this point directly. The employee asked for a lighter workload and a break. She was told to wait three monthsThe standard time limit for bringing most employment tribunal claims, running from the date of the act complained of. Because the limit is three months less one day, you should not wait until what fee... and offered counselling instead. The Court of Appeal held that where the employer knows the root cause is the job itself, counselling is not a substitute for actually changing something. Intel Corporation v Daw reaches the same conclusion from a different direction: an employer who knows your workload is unmanageable has to reduce it, not just point you toward support services while it stays the same.

If your employer’s response to a genuine concern is a leaflet, that’s worth remembering later.

When stress leads to a mistake at work

Sometimes the harder situation isn’t the stress itself. It’s what happens afterwards, when something you did or said under that pressure gets treated as a disciplinary matter.

City of York Council v Grosset addresses this directly. A teacher with cystic fibrosis, under exceptional workload-driven stress, showed pupils a film he shouldn’t have. He was dismissed. What mattered was knowledge of the disability itself. The Court of Appeal found the employer did not need to know it caused this specific incident for the dismissal to count as discrimination arising from disabilityA type of disability discrimination under section 15 of the Equality Act 2010, where you're treated unfavourably because of something connected to your disability, like time off or how a condition aff... under section 15 of the Equality Act 2010The main piece of legislation protecting employees from discrimination at work. It covers nine protected characteristics including age, disability, sex, race, and religion, and makes it unlawful for a.... The same principle protected a duty manager treated as absent without leave during a mental health crisis in Dunn v J D Wetherspoon.

Elliott v Dorset County Council adds an important detail: coping well, even for years, doesn’t mean you stop being disabled. A tribunal has to ask whether your coping strategies might break down under pressure, not just credit you with managing so far as proof there’s nothing to protect.

Bullying is its own route in

Sustained bullyingRepeated, unreasonable behaviour towards you at work that undermines you or damages your dignity, such as persistent criticism, exclusion, humiliation, or intimidation. Bullying on its own is not auto... that damages your mental health can be a psychiatric injury claim in its own right, separate from any disability angle. Green v DB Group Services involved years of exclusionary and hostile treatment that put an employee in hospital with major depression. The employer was liable both directly and through the actions of her colleagues.

Hill v Lloyds Bank shows what a workable remedy can look like afterwards: an undertaking that you won’t be made to work with, or be managed by, the colleague who bullied you can itself count as a reasonable adjustment, whether or not the original grievanceA formal complaint raised by an employee against their employer, triggering a legal obligation to investigate and respond. was upheld in full.

Where these claims don’t succeed

Not every case wins, and it’s worth knowing why.

In Newey v Encompass Care Organisation UK, a care workerA legal category that sits between employee and self-employed. Workers are entitled to certain rights including national minimum wage, paid holiday, and protection from unlawful deduction from wages, ... with epilepsy resigned after an unfair suspension and later had stress-related seizures. Her constructive dismissalWhen your employer's behaviour is so serious that you feel you have no choice but to resign, the law may treat that resignation as a dismissal. The most common basis is a fundamental breach of the imp... claim succeeded. Her disability discrimination claim didn’t, because nobody at the company knew, or could reasonably have known, that the stress from the process would trigger her seizures.

What this tells you: employer knowledge is doing a lot of work in this area of law. The clearer you’ve made your situation, in writing, at the time, the harder that argument becomes for them to make later.

What to actually do next

Put it in writing. An email describing what’s happening, how it’s affecting you, and what you’re asking for creates the notice your employer needs, and the record you’ll need if this goes further.

Ask for an occupational health referral if you haven’t had one. It puts an independent, documented view of your situation in front of your employer. A written record like that is hard to argue with later.

If you’re facing a sickness absence meeting off the back of this, know what to expect going in. See our guide on what happens at a sickness absence meeting, and use our sickness absence meeting checklist.

If nothing changes after you’ve raised it, a formal grievance puts your concerns on record in a way that’s harder to overlook.