Is Complex PTSD a Disability? What UK Law Actually Says

Is complex PTSD a disability? Often, yes, under the Equality Act 2010. But not because of the diagnosis. The law asks what the condition does to your daily life, and three rules in it suit complex PTSD unusually well.

This is information, not legal advice, and I am not a lawyer or a welfare rights adviser. It is here because the question gets asked constantly and answered vaguely. Before you rely on it at work or in a dispute, get proper advice. There is a list at the end.

What does the law actually say?

Section 6 of the Equality Act 2010:

A person (P) has a disability if (a) P has a physical or mental impairment, and (b) the impairment has a substantial and long-term adverse effect on P's ability to carry out normal day-to-day activities.

There is no list of conditions. Complex PTSD is not named, and neither is anything else. Which cuts both ways: a diagnosis does not make you disabled in law, and the lack of one does not stop you being disabled in law. What counts is the effect.

"Substantial" is defined in section 212 as more than minor or trivial. That bar is a great deal lower than most people assume. It does not mean severe.

The three rules that fit complex PTSD

Schedule 1 to the Act fills in the detail, and three parts of it read almost as if they were written for a fluctuating, treatable trauma condition.

1. Long-term means 12 months. An effect is long-term if it has lasted at least 12 months, is likely to last at least 12 months, or is likely to last for the rest of your life. Complex PTSD usually develops from trauma that went on for years, and its effects are rarely brief.

2. Good spells do not cancel it. Paragraph 2(2): if an impairment stops having a substantial adverse effect, it is treated as continuing to have that effect if the effect is likely to recur. If you have stretches where you cope and stretches where flashbacks, nightmares or shutdown take over, the good stretches do not erase the bad ones in law.

3. Treatment is taken out of the picture. Paragraph 5: an impairment is treated as having a substantial adverse effect if measures, including medical treatment, are being taken to treat or correct it, and without them it would be likely to have that effect. So if therapy or medication is what keeps you functioning, the question is what your life would look like without it.

What it means at work

If you meet the definition, your employer has a duty to make reasonable adjustments. Section 20 describes it: where a provision, criterion or practice puts a disabled person at a substantial disadvantage compared with people who are not disabled, the employer must take such steps as it is reasonable to have to take to avoid the disadvantage.

For complex PTSD, the adjustments people most often ask for are ordinary ones: time off for therapy appointments, a predictable schedule, a seat that is not facing away from a door, warning before difficult meetings, written instead of sprung feedback. None of them is exotic. All of them are easier to ask for once you know the duty exists.

You do not have to use the word "disabled" about yourself to rely on this. Many people with complex PTSD would not choose it. The protection does not depend on whether you like the label.

Is complex PTSD a disability for PIP?

Different question, different test. Nobody qualifies for PIP by having complex PTSD, any more than by having BPD or PMDD. PIP scores how your condition affects specific daily living and mobility activities, and whether you can do them reliably. You can meet the Equality Act definition and score nothing on PIP, or the other way round. This is how the PIP rules actually work, including the reliability test that matters most for a fluctuating condition.

Is complex PTSD a brain injury?

This gets searched a great deal, so it is worth answering plainly: there is no good evidence that it is.

Brain-scan studies have found differences in some trauma survivors, and popular books, especially The Body Keeps the Score, have turned that into a story about trauma damaging the brain. A 2025 commentary in BJPsych Bulletin checked that story. The scan studies were cross-sectional snapshots with no power to show the trauma caused the differences, and three reviews of studies that followed people over time concluded the differences likely came first. More on that book here.

Complex PTSD is a recognised mental health condition, ICD-11 code 6B41, it is serious, and it is treatable. This is the NHS route. Believing your brain is broken can make treatment feel pointless. It is not.

Where to get proper advice

• Acas for anything at work, including reasonable adjustments and disputes.
• Citizens Advice for benefits, and for discrimination problems outside work.
• The Equality Advisory and Support Service (EASS) for discrimination questions.
• A union rep, if you have one, before any formal meeting.

Sources

• Equality Act 2010, section 6, section 20, section 212(1), and Schedule 1 paragraphs 2 and 5, read on legislation.gov.uk on 2 October 2026.
• Scheeringa MS. Evaluating evidence behind popular trauma narratives. BJPsych Bulletin, 2025.
• World Health Organization, ICD-11, 6B41 Complex post traumatic stress disorder.

If something here is out of date or wrong, tell me.

Nothing here is medical or legal advice, it's lived experience, meant to sit alongside real support, not replace it. If you're struggling, please see the support resources. If you're in crisis in the UK, call Samaritans free on 116 123, or dial 999 in an emergency.