Neurodivergent Conditions Are Disabilities Under the Law
ADHD, autism spectrum conditions, dyslexia, dyspraxia, dyscalculia, Tourette syndrome, and many other neurodivergent conditions are capable of being disabilities under the Equality Act 2010. The legal definition of disability requires a physical or mental impairment that has a substantial and long-term adverse effect on your ability to carry out normal day-to-day activities. Substantial means more than minor or trivial. Long-term means lasting or likely to last at least 12 months.
Most neurodivergent conditions easily satisfy both limbs of this test. ADHD that affects your ability to concentrate, manage time, organise tasks, and regulate attention has a substantial adverse effect on normal day-to-day activities. An autism spectrum condition that affects social communication, sensory processing, and executive function does the same. Dyslexia that affects reading, writing, and information processing is covered. If your condition has these effects and has lasted or is expected to last at least 12 months, you are a disabled person for the purposes of the Equality Act 2010 -- regardless of whether you have a formal diagnosis, regardless of whether your employer knows about it, and regardless of whether you think of yourself as disabled.
The Mid-Career Diagnosis
Tribunal claims involving neurodivergent conditions have risen dramatically -- ADHD-related cases increased 750% between 2020 and 2025. A significant driver of this is the surge in adult diagnoses. Many people who have spent years being told they are underperforming, disorganised, or difficult receive an ADHD or autism diagnosis in their thirties or forties and look back at their employment history with new understanding. Performance improvement plans that made no sense now look like a failure to make reasonable adjustments. Disciplinary processes that penalised behaviours now understood as symptoms of a neurodivergent condition may have been discriminatory. Dismissals that followed refusals to accommodate may have been automatically unfair.
A diagnosis obtained after dismissal can still support a claim. What matters is whether the condition existed and had the relevant effects at the time the employer's acts occurred, not whether a diagnosis had been made at that time. If you were dismissed six months ago and received your ADHD diagnosis last week, your claim is not extinguished. Take advice immediately on the time limits.
What Your Employer Must Do: Reasonable Adjustments
Once your employer knows or should know that you are disabled, they have a duty to make reasonable adjustments. This duty is anticipatory -- it applies as soon as the employer knows or reasonably ought to know about the disability. They do not need a formal diagnosis. They do not need a letter from your GP. If they are aware of difficulties you are experiencing that could be disability-related, the duty may already be engaged.
Reasonable adjustments for neurodivergent conditions typically include: additional time for tasks and deadlines, written instructions rather than verbal ones, a quieter workspace or noise-cancelling headphones, flexible working hours to accommodate executive function difficulties, regular structured check-ins rather than ad hoc feedback, adjusted performance targets during a period of diagnosis and treatment, specialist coaching or assistive technology, and modified attendance requirements during periods when symptoms are more acute.
What is reasonable depends on the size of the employer, the cost of the adjustment, its effectiveness, and the extent of the disruption. A large employer who refuses adjustments on cost grounds when the cost would be trivial relative to their resources has almost certainly failed the duty. A refusal to provide written instructions to a dyslexic employee because it is inconvenient is not a reasonable refusal.
Types of Discrimination That Apply
Direct discrimination: treating you less favourably because of your neurodivergent condition. Example: not promoting you because your manager thinks your ADHD will affect your performance in a more senior role.
Discrimination arising from disability: treating you unfavourably because of something arising in consequence of your disability, without justification. Example: disciplining you for missing deadlines when the deadline difficulties arise from your ADHD and no adjustments have been made.
Indirect discrimination: applying a provision, criterion, or practice that puts neurodivergent employees at a particular disadvantage. Example: a blanket policy that all performance reviews are conducted verbally with no written follow-up, which disadvantages employees with processing difficulties.
Failure to make reasonable adjustments: the specific duty described above. This is often the most powerful claim in neurodiversity cases because it is forward-looking -- it asks what the employer should have done, not just whether they treated you badly.
Harassment: unwanted conduct related to disability that has the purpose or effect of violating your dignity or creating an intimidating, hostile, degrading, humiliating, or offensive environment. Example: colleagues or managers making comments about your ADHD diagnosis, mocking difficulties you experience, or treating you as less capable.
Performance Management and PIPs
Many neurodivergent employees first encounter serious employment difficulties when placed on a performance improvement plan. A PIP issued to a neurodivergent employee without prior attempts to understand and accommodate their condition raises significant legal questions. Before issuing a PIP, a reasonable employer should have: explored whether difficulties might have a disability-related cause, obtained occupational health input if appropriate, considered whether reasonable adjustments might resolve the performance concerns, and given any adjustments adequate time to take effect.
A PIP that targets behaviours or performance difficulties that are directly attributable to a neurodivergent condition, where no adjustments have been made, may itself constitute discrimination arising from disability. If dismissal follows such a PIP, the dismissal may be unfair and discriminatory simultaneously. Both claims can be brought in the same ET proceedings.
What to Do Now
Write down every occasion on which you have raised your condition with your employer -- verbally or in writing, formally or informally. Write down every adjustment you have requested and what the response was. Write down every performance management step and when it occurred relative to your disclosure. Gather any written evidence: emails, letters, occupational health reports, appraisals, PIP documentation. This contemporaneous record is the foundation of any claim. Request reasonable adjustments in writing today if you have not already done so -- stating specifically what you need and why. Keep a copy of everything. Contact ACAS at acas.org.uk within three months less one day of any act of discrimination or dismissal.