07/05/2026
Do all autistic people have ADHD?
And do all people with ADHD have autism?
No.
But they can overlap.
Autism and ADHD are two separate diagnoses in the DSM-5, each with their own diagnostic criteria, presentation, and challenges.
At the same time, research suggests that Autism and ADHD can co-occur.
Some studies estimate that 50-70% of autistic individuals may also experience ADHD, while around 1 in 8 individuals with ADHD may also meet criteria for Autism.
They remain two separate diagnoses in the DSM-5.
This is where things can become confusing.
Autism and ADHD can sometimes share outward signs, including:
Difficulty with focus
Emotional overwhelm
Sensory sensitivity
Executive functioning challenges
Social exhaustion
Restlessness or burnout
But the reasons underneath those experiences can be very different.
For example:
Someone with ADHD may struggle to focus because their attention shifts quickly, they feel under-stimulated, or their brain is constantly seeking novelty.
Someone who is autistic may struggle to focus because the environment feels overwhelming, the task feels unclear, there has been a change in routine, or their energy has already been used up masking.
The behaviour may sometimes look similar.
But the underlying experience may not be the same.
That is why proper assessment matters.
Not everyone with ADHD is autistic.
Not every autistic person has ADHD.
But some people do experience both.
And when both are present, people often describe feeling pulled in different directions:
Wanting routine, but struggling to maintain it
Craving novelty, but feeling overwhelmed by change
Needing structure, but resisting restriction
Feeling deeply focused sometimes, and completely scattered at other times
At The Spectrum Centre, we assess and support adults with Autism and ADHD, whether you are exploring one diagnosis, both, or trying to better understand why things have felt harder than they “should”.
Different, not distant.
Understood, not judged.
➡️ Booking Link: https://clientportal.zandahealth.com/clientportal/spectrumcentre
🌐 https://spectrumcentre.co.za/
📧 [email protected]
We specialise in Adult Autism diagnosis and long term therapy. The Diagnosis is conducted over 2 sessions by one of our Autism (Neurodiversity) Specialist Psychologists. The diagnosis process consists of a Clinical Interview based on the diagnostic criteria of ASD Autism Spectrum Disorder as specifi...