With NHS ADHD waiting lists stretching to 3–5 years in many parts of the UK, private assessment has become the practical reality for a growing number of people. But the costs are significant — typically £595 to £1,800 — and for many people, especially those already managing financial strain as a consequence of undiagnosed ADHD, spending that amount feels both necessary and impossible. This guide gives you an honest, balanced assessment of whether going private is the right choice for you, and what alternatives exist.
Key Takeaways
- Private assessment offers 2–8 week wait vs 3–5 years on NHS — speed is the primary advantage
- Costs range from £595 to £1,800; always compare total costs including report and follow-up fees
- NHS Right to Choose provides free private assessment for English patients in 3–12 months
- Consider payment plans and charity funds if upfront cost is a barrier
Why People Go Private for ADHD Assessment
The primary driver for private ADHD assessment is time. When the NHS waiting list in your area is 4 years, and ADHD symptoms are actively preventing you from performing at work, maintaining relationships, or managing your mental health, waiting is not simply inconvenient — it can be actively harmful. People lose jobs, relationships, and significant mental health stability in the time they spend undiagnosed. Against this backdrop, paying for a private assessment is often a rational economic decision, even at significant personal expense.
There is also a diagnostic bottleneck at the GP level. Some GPs are reluctant to refer for ADHD assessment, particularly for adults who have apparently managed without a diagnosis until their 30s or 40s. The private sector bypasses this gatekeeping — patients can self-refer directly to a private clinic without a GP referral.
Pros and Cons of Private ADHD Assessment
Pros: The most obvious advantage is speed — private clinics can typically see you within 2–8 weeks, compared to years on the NHS. You also have the freedom to choose your provider: you can research clinics, read reviews, and select one that specialises in your age group or has a strong reputation for complex cases. Private assessments generally produce detailed written reports that are useful for employment, education, and future healthcare interactions.
Cons: The cost is the most significant barrier — £595 to £1,800 is a substantial sum. There is also the risk of variability in quality. While all CQC-registered clinics must meet minimum standards, the quality of private ADHD services varies. Additionally, obtaining a shared care agreement from your NHS GP after a private diagnosis is not guaranteed, meaning the ongoing medication cost can remain high.
How Much Does a Private Assessment Cost?
Private ADHD assessment costs in the UK range from approximately £595 for a streamlined online assessment to over £1,800 for a comprehensive in-person evaluation with a senior consultant psychiatrist. Online-only assessments (via video call) tend to be more affordable — typically £595–£850. In-person assessments at established private clinics in major cities typically cost £900–£1,400. Children's assessments are usually at the higher end (£900–£1,800) due to the greater clinical complexity involved.
It is critical to compare total costs rather than headline prices. Some clinics advertise low assessment fees but charge separately for the written report (£100–£200), the GP letter (£50–£100), and the follow-up consultation (£150–£250). Always request a complete fee breakdown.
Alternatives to Paying Full Price
NHS Right to Choose is the most valuable alternative for people in England who need a faster-than-NHS timeline but cannot afford private fees. Under this scheme, you ask your GP to refer you to a private clinic that holds an NHS contract — the NHS pays the full assessment cost, and you typically wait 3–12 months rather than 3–5 years.
Some private ADHD clinics offer payment plans, allowing you to spread the assessment cost over 3–12 months. When enquiring with a clinic, always ask whether payment plans are available — it is not always advertised prominently. Some specialist ADHD charities also run hardship funds or subsidised assessment programmes for those on low incomes.
Frequently Asked Questions
Is a private ADHD diagnosis accepted by the NHS?
Yes — a private ADHD diagnosis from a CQC-registered clinic is accepted by the NHS. Your GP can proceed with shared care for prescribing medication, and the diagnosis is recognised for employment and educational purposes under the Equality Act.
What if I get assessed privately and the result is negative?
A negative outcome is still valuable — it rules out ADHD and may prompt investigation of other conditions (anxiety, depression, sleep disorders, autism) that can mimic or co-occur with ADHD. A thorough clinician will provide a differential diagnosis even if ADHD is not confirmed.
Can I be re-assessed on the NHS after a private diagnosis?
You generally do not need to be re-assessed. A diagnosis from a CQC-registered private clinic with a full written report should be accepted by NHS services for the purpose of medication initiation and shared care.