Usually yes, but not automatically. Autism counts as a disability under the Equality Act 2010 if it has a substantial, long-term effect on day-to-day activities. It is judged case by case, and no diagnosis is required.
The legal test
There is no list of conditions in the Act, and autism is not named in it. A person is disabled if they have a physical or mental impairment that has a substantial and long-term adverse effect on their ability to carry out normal day-to-day activities (section 6). GOV.UK spells out the two thresholds: substantial means more than minor or trivial, and long-term means the effect has lasted, or is likely to last, 12 months or more (GOV.UK). Autism is lifelong, so the long-term limb is rarely the sticking point; the question is usually whether the effect on everyday activities is substantial.
Why it is not automatic, and needs no diagnosis
A few conditions are a disability from the moment they arise: cancer, HIV and multiple sclerosis are recognised automatically under the Act. Autism is not on that list, so you cannot assume either that every autistic person is covered or that an undiagnosed person is not. Each case turns on the effect the impairment actually has.
Two points catch employers out. First, the protection does not depend on a formal diagnosis. Acas is explicit that being neurodivergent will often amount to a disability, and that a worker does not need a diagnosis to be protected. Second, your duty can be engaged once you know, or could reasonably be expected to know, that someone is disabled, not only once they hand you a clinic letter.
What this means for you
Where the test is met, disability is a protected characteristic and three things follow. You must not discriminate against an applicant or employee because of it (section 39). You owe a duty to make reasonable adjustments where a working practice or feature puts them at a substantial disadvantage (section 20). And you must not treat them unfavourably because of something arising from the autism, such as a communication style or a sensory response, unless you can justify it (section 15).
The practical risk is gatekeeping: waiting to act until you are certain the legal label is met. A tribunal decides that label after the event, and by then a missed-adjustment claim has already landed. The safer course is to respond to the difficulties the person describes and the adjustment they ask for, rather than treating disability status as a hurdle they must clear first. You can read more on the wider test in what counts as a disability under the Equality Act 2010.
- Treat a request for support as the start of the conversation, not as a claim to be defended against.
- If you genuinely need to test the status, ask occupational health about the functional effects, not just for a copy of any diagnosis.
Where the law comes from
Related
This page is general information, not clinical or legal advice.