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Many people wonder whether they have ADHD, autism, or both. As these neurodevelopmental conditions share similar symptoms, the ADHD and autism overlap is often misunderstood, something a structured assessment can help with for both adults and children, get clarity now:
Approximately 21% of children with ADHD are also autistic, with others having heightened autistic traits¹
Around 28% of autistic children also meet criteria for ADHD²
While they are separate diagnoses, ADHD and Autism (ASD) frequently occur together with many people meeting the criteria for both, leading to the informal community term ‘AuDHD’. Research suggests a significant number of autistic people also have ADHD⁴, and vice versa.
Both conditions begin in childhood and affect brain development, they often impact attention, executive function, and social life in similar ways. These overlapping symptoms can sometimes complicate a diagnosis, making a specialist assessment essential to untangle the two.
Clinicians often use the DSM-5 diagnostic manual when assessing ADHD and autism. In the past, older versions of this manual actually prevented a dual diagnosis, making it very difficult to identify both together.
This changed when newer guidelines removed that restriction. If you have ever wondered, ‘can you be diagnosed with ADHD and autism’ at once, the answer is now a clear yes, which is why more people are now discovering they have a combination of both.
Autism is primarily characterised by unique ways of communicating and experiencing the world. Many people find comfort in clear rules and predictable routines, often developing a deep, expert-level knowledge of specific interests.
Difficult concentrating can arise from ADHD, Anxiety or a combination of both.
Autism is a neurodevelopmental condition shaping how a person communicates, relates to others, and experiences their environment. Often referred to as an autism spectrum condition (ASD) it covers traits including social communication differences, preference for repetitive patterns, and intense interests. Many individuals also experience significant sensory differences. Additionally, being on the spectrum often brings unique strengths, such as an exceptional eye for detail and a highly focused, expert perspective.
ADHD is a neurodevelopmental condition that affects attention, activity levels, and impulse control. This typically involves three core domains: inattention, hyperactivity, and impulsivity. It can look very different across ages and genders. While some children may be physically restless, many adults, particularly women with ADHD, experience a ‘quieter’, more internal form of the condition that presents as racing thoughts or chronic disorganisation.
Seeing overlap in both columns? Many people with undiagnosed ADHD are surprised to find how much of their experience overlaps with autism. An ADHD assessment is a clear first step toward understanding your full profile.
ADHD and Autism symptoms share significant common ground, particularly regarding executive function and emotional regulation. Both conditions can involve intense focus on specific interests or a sense of being easily overwhelmed by sensory input. These shared features are often what make identifying the specific difference between ADHD and autism in adults a complex process.
The primary differences often lie in the underlying motivation for certain behaviours. While ADHD is fundamentally linked to difficulties with impulse control and consistent attention, Autism Spectrum Disorder involves a unique way of managing social communication and a preference for predictable patterns. Understanding whether a challenge is driven by a need for stimulation or a need for routine is a key part of a clinical evaluation.
It is possible to meet criteria for both ADHD and autism, and a specialist assessment is the safest way to untangle these long-term patterns and plan support.
The informal term ‘AuDHD’ is often used to describe the experience of being both Autistic and having ADHD. These AuDHD experiences highlight what ADHD and autism can feel like day to day for people living with both.
The following experiences are shared by people living with both ADHD and autism, sourced from ADDitude Magazine.5
There is a wide range of support available for both conditions, designed to help you navigate daily challenges effectively. Because every neurodivergent profile is unique, treatment plans should be individualised based on whether someone has ADHD, autism, or both.
ADHD treatment options focus on managing attention and energy levels through practical, everyday strategies. This typically includes specialist therapy, such as ADHD-adapted CBT or ADHD executive function coaching to build daily routines and manage impulsivity, alongside environmental changes like using clear structures and breaking complex tasks into smaller steps. Additionally, medication is one option that can be discussed with a qualified professional as part of a comprehensive, tailored plan.
Autism support is generally centred on understanding your own social and sensory needs to create a more comfortable, predictable environment. Common approaches include developing strategies for social communication and making sensory accommodations, such as adjusting light or sound levels. Psychoeducation is also key, helping both the individual and their family understand how their brain works to foster a supportive and sustainable home life.
When managing support for ADHD and autism together, a blended, multi-disciplinary approach is often the most effective. It is vital to assess both conditions simultaneously so that a treatment plan doesn’t overlook how they interact. For example, a strategy that helps with ADHD focus must also respect an autistic need for sensory calm and routine.
If you recognise these traits in yourself or your child, you are not alone. The intersection of ADHD and autism can feel like constant firefighting, but a professional evaluation is the first step toward understanding your unique profile and accessing the right tools.
Our clinical team provides a clear path forward through a comprehensive ADHD assessment. Because ADHD and autism share so many symptoms, a thorough ADHD assessment considers the full picture of how you experience the world, not just a checklist of inattention or hyperactivity. This approach helps you move past the cycle of “under-achieving” toward a life built on your strengths.
We offer more than just a diagnosis. From initial screenings to specialist therapy and treatment planning, we help you develop the practical strategies needed to manage daily life. Reaching out for a professional assessment can help you stop doubting yourself and start finding support that actually fits.
Got a question? Just reach out. We’ll get back to you as soon as we can, because your health matters, and we’re with you every step of the way.
Yes. It is very common for both conditions to occur together, a combination often informally called ‘AuDHD’. While they were once diagnosed separately, clinical guidelines now recognise that many people meet the criteria for both.
The difference between ADHD and autism often lies in the motivation behind a behaviour. For example, an adult with ADHD might avoid a task due to a lack of stimulation, while an autistic adult might avoid it due to sensory overwhelm or a change in routine.
No, ADHD is not part of the autism spectrum; they are two distinct neurodevelopmental conditions. However, they are frequently linked because they both affect the brain’s executive function and how a person processes information.
Yes, ADHD can be mistaken for autism because symptoms like social challenges or sensory sensitivities overlap. A specialist assessment is necessary to determine if these traits are driven by ADHD, autism, or a combination of both.
Yes, both conditions tend to present differently in girls and women. Social pressure to appear ‘normal’ often leads to masking, where a person learns to mirror others, suppress their traits, and push through difficulties in ways that hide how much effort it takes. This means struggles with focus, sensory overwhelm, or social exhaustion are often invisible to others, including teachers and doctors.
As a result, girls and women are frequently diagnosed much later than boys, or misdiagnosed with anxiety or depression first. If you have spent years feeling like you are working twice as hard as everyone else just to keep up, it may be worth exploring whether ADHD is part of the picture.
If you are unsure about ADHD and autism in your children or yourself, the first step is to speak with a qualified clinician. They can provide a professional evaluation to untangle your specific symptoms and help you access the right support for your needs.