Is a Private ADHD Assessment Worth It? Cost vs Benefit

A private ADHD assessment typically costs £500-1,200. The NHS provides the same assessment free, but with waiting times averaging 2-5 years. On the surface, this is a simple trade-off: money vs time. In practice, the calculation is more complex, because the true cost of waiting and the true cost of going private both involve expenses that aren't immediately obvious.

What You Get for the Money

A private ADHD assessment typically includes a pre-assessment screening questionnaire, a 60-90 minute consultation with a specialist psychiatrist, standardised diagnostic testing, a comprehensive written report, and a treatment plan with recommendations. The report is usually delivered within 1-2 weeks and can be used for workplace adjustments, Access to Work applications, and educational support. Some providers include an initial medication consultation in the assessment fee; others charge separately (£100-300 for titration initiation).

The assessment itself should be clinically equivalent to an NHS assessment when conducted by a CQC-regulated provider using standardised tools. The difference is speed: most private providers offer appointments within 2-4 weeks, compared to years through the NHS.

The Hidden Cost of Waiting

The strongest financial argument for private assessment isn't the assessment itself: it's the cost of undiagnosed ADHD during the years you'd otherwise spend on a waiting list. The 'ADHD tax' (impulse spending, late fees, convenience premiums, and career costs) is estimated at over £1,600 per year. If treatment reduces even a portion of these costs, the assessment pays for itself within a year.

Career impact is harder to quantify but often larger. ADHD medication and coaching improve productivity, consistency, and the ability to manage professional demands. Access to Work can fund up to £69,260 per year in support, but you need a diagnosis to apply. Every year spent waiting is a year without that funding. If you're self-employed, where Access to Work covers 100% of costs, the financial argument for fast diagnosis is even stronger.

The Hidden Cost of Going Private

The assessment fee is the upfront cost. The ongoing cost depends on whether your GP accepts a shared care agreement. If they do, your medication transfers to NHS prescriptions (standard costs) and the private route has effectively saved you years of waiting for a one-off fee. If your GP refuses shared care, you'll pay £100-200 per month for private prescriptions indefinitely.

Shared care acceptance rates vary significantly. A 2024 survey by ADHD UK found acceptance rates of 58% in England, 38% in Northern Ireland, 29% in Scotland, and 19% in Wales. Before investing in a private assessment, speak to your GP practice. Ask specifically whether they enter shared care agreements with private ADHD providers. This single conversation could save you thousands.

When Private Assessment Is Worth It

1. 1

   Your GP confirms they'll accept shared care. This caps your total cost at the assessment fee (£500-1,200) plus perhaps a few months of private prescriptions during titration. Strong value.

2. 2

   ADHD is significantly affecting your income. If untreated ADHD is costing you in career terms (missed deadlines, lost clients, underperformance, burnout), fast diagnosis and treatment can recover more than the assessment costs.

3. 3

   You're eligible for Access to Work. A diagnosis unlocks funding for coaching, technology, and support. For self-employed people, the first year's Access to Work funding alone could exceed £10,000 in value.

4. 4

   Your mental health is deteriorating while waiting. If the uncertainty, struggle, and frustration of undiagnosed ADHD is affecting your mental health, the wellbeing value of a faster answer is real, even if it's not easily quantified.

5. 5

   You're in England and Right to Choose isn't available through your GP. Some GPs resist Right to Choose referrals, and some Right to Choose providers have growing waiting times. Private assessment may be the only route to timely diagnosis.

When Waiting May Be Better

If the assessment cost would create financial hardship, if your GP won't accept shared care (making ongoing costs high), or if your local NHS waiting time is relatively short (under a year), waiting for the NHS or using Right to Choose may be the better option. You can also join the NHS waiting list and get a private assessment simultaneously: if shared care doesn't work out, the NHS assessment will eventually provide a pathway to NHS prescriptions.

Payment Options

Most private providers offer payment plans, and some accept 0% interest options through PayPal Credit or Klarna for the assessment fee. Some providers offer reduced rates for people on low incomes, though this varies. If you have private health insurance, check whether ADHD assessment is covered under your mental health provision.

Sources

ADHD UK · NICE: ADHD guideline NG87 · Care Quality Commission · GOV.UK: Access to Work · Psychiatry-UK · NHS: ADHD