A lot of adults arrive at the decision to seek an ADHD assessment after years of wondering why certain things feel harder than they seem to for everyone else. Why strategies that work for other people never quite work for you. Why you have to try so much harder just to keep up, even when things look fine from the outside.
You don’t need to be sure it’s ADHD to ask the question. This guide explains what an assessment involves, how to prepare for it and what happens afterwards, so the process feels clearer from the first step.
How common is adult ADHD?
International estimates suggest around 3 to 5% of people have ADHD. In England, only 1.19% have a recorded diagnosis, according to a 2026 study of more than 42 million primary care records.
The two figures measure different things, and England has no recent diagnostic survey of adults, so the true number isn’t known. The Independent Review led by Professor Peter Fonagy, published on 9 October, makes the same distinction and says under-recognition continues for some groups.
Women, older adults and people from minoritised ethnic communities are among those more likely to go unrecognised, because ADHD doesn’t always look the way people expect.
Why ADHD in adults is so often missed for years
ADHD in adults isn’t always obvious, including to the person experiencing it. Some adults appear organised and capable while working extremely hard behind the scenes to manage work, relationships, routines and everyday responsibilities. Others have developed ways of adapting that make ADHD less visible, sometimes without realising that’s what they’ve been doing.
It also overlaps with everyday experience. Most people lose focus or feel disorganised at times. What marks out ADHD is that the difficulties are persistent, show up in more than one area of life and affect day to day functioning.
What happens during an adult ADHD assessment
A private ADHD assessment for adults is a structured, in-depth conversation with a specialist clinician, delivered online. You don’t need a referral, and you don’t need to have worked out what’s going on first. That’s what the assessment is for.
The process typically looks like this:
- A free consultation first. Before any assessment begins, you can talk through what you’re noticing and ask questions, so you know what to expect and whether it’s the right next step.
- The assessment itself. A specialist clinician builds a full picture of your experiences, strengths and support needs, covering how things show up at work, in relationships and in daily routines. They will also discuss your developmental history, including how these areas have shown up throughout your life.
- Multidisciplinary review. Findings are discussed within a wider clinical team, which can include nurses, occupational therapists, speech and language therapists, psychologists and psychiatrists, so the outcome reflects more than one clinical perspective.
- A clear report. You receive a report setting out the clinician’s findings and next steps, written to be genuinely useful.
- A follow-up conversation. The report is reviewed with you directly, so you can ask questions and understand what it means in practice.
An assessment should consider the whole person, including their strengths, difficulties and individual circumstances. ADHD symptoms can overlap with other experiences or conditions, so the clinician considers the wider picture before reaching an outcome. If autism may also be relevant, a combined assessment looks at both together, since the two commonly co-occur and can present in overlapping ways.
“A good assessment isn’t about ticking boxes against a checklist. It’s about understanding how someone’s whole life actually works, what takes more effort than it should and what’s been missed along the way. That’s why we look at the full picture together, rather than relying on any one clinician’s view in isolation.”
Joanna Smith, Team Manager and Occupational Therapist, Melios
How to prepare for an ADHD assessment
You don’t need to prepare extensively, but a few things can help the assessment reflect your experience accurately:
- Think of specific examples, not general impressions. “I struggle with organisation” is harder to work with than “I’ve missed three deadlines this year despite setting reminders for all of them.”
- Think about different areas of life, not just work. Relationships, routines and day-to-day admin can all be affected differently.
- Be honest about what you’ve been managing, not just what’s visible. Many adults have spent years compensating so effectively that the difficulty is invisible to everyone else. That effort is relevant information.
- You don’t need a theory about what’s going on. Turning up unsure is completely normal. The clinician’s job is to help build the picture, not to have it handed to them.
What happens after an ADHD assessment
An assessment should help you understand your experiences and identify practical next steps, whatever the outcome. Not everyone assessed for ADHD will receive a diagnosis, but that doesn’t mean their difficulties aren’t real or that there’s nothing they can do about them. The Independent Review published on 9 October makes a similar point, calling for support to be available “according to need rather than diagnosis alone”.
The recommendations you receive should reflect your circumstances. They might include strategies for everyday life, adjustments at work or in education, or further clinical support where appropriate, such as post-assessment support, therapy or, where clinically appropriate, a conversation about ADHD medication. None of this needs to be decided during the assessment itself.
“The response to a late diagnosis is not usually simple. Many people describe an initial wave of relief, finally having an explanation that makes sense after years of struggle, sometimes followed by grief for the years spent without one. … With an accurate outcome, people can begin to have a sense of self-compassion, and grace to give themselves space to understand how their minds work.”
Joanna Smith, Team Manager and Occupational Therapist, Melios
Ready to find out more?
You don’t need to have everything figured out before getting in touch. A free consultation gives you space to ask questions and work out whether an assessment is the right next step for you.
Sources
- Stewart, G., John, A., Stott, J. et al. (2026). Trends in recorded ADHD diagnoses in England, 2000 to 2024, using primary care data from more than 42 million patients. The Lancet Regional Health Europe.
- Fonagy, P. (Chair), Baird, G. and Wessely, S. (Vice-Chairs) (2026). Independent review into prevalence and support for mental health conditions, ADHD and autism: final report. Department of Health and Social Care, 9 October 2026. https://www.gov.uk/government/publications/independent-review-into-mental-health-conditions-adhd-and-autism-final-report
