How Much Does a Dyslexia Assessment Cost? A UK Parent’s Guide
Updated: Oct 28
The cost of a private dyslexia assessment depends on the provider, the type of assessment and what the service includes. Before comparing prices, check whether you are looking at a screening service or a full diagnostic assessment, and whether the written report and feedback are included.
At Dyslexia Tests Online, a full diagnostic assessment with Mark Trewby costs £400. This includes preparation, the assessment appointment, a personalised written report and feedback. The fee is the same for eligible online assessments across the UK and face-to-face assessments in Bournemouth.
What does the £400 assessment fee include?
The appointment is one part of the work involved. The fee also covers preparation, consideration of background information, scoring and interpretation, and writing a report that explains the findings and recommendations.
A free 15-minute introductory call to discuss your concerns and assessment suitability.
Preparation and review of the background information provided.
A live, individual assessment, normally lasting approximately three hours.
Scoring, analysis and a personalised written report.
Recommendations based on the young person’s learning profile.
The report within seven working days of the assessment.
A feedback conversation to discuss the findings and next steps.
There is no separate charge for the diagnostic report or the included feedback. For the Bournemouth face-to-face service, the £400 also includes Bournemouth travel and any agreed library room hire.
Does an online dyslexia assessment cost less?
An online appointment may remove the need to travel, but the assessor still needs to prepare, conduct the assessment, interpret the findings and write the report. The delivery method alone does not tell you how much professional work is included.
Mark’s online and Bournemouth face-to-face diagnostic assessments both cost £400. Online assessments are available across the UK for ages 11–21. Face-to-face assessments in Bournemouth are for ages 8–21, at the client’s home or in a hired library room. The setting and suitability are discussed before the appointment.
Why is screening cheaper than a diagnostic assessment?
Screening and diagnostic assessment answer different questions. A screener can identify possible risk and help guide next steps. It does not provide a diagnosis or replace a full diagnostic assessment.
Mark’s separate assessor-led online TOD-S screening service costs £50. It normally takes 20–30 minutes and includes a written screening summary within 24 hours. Under the current offer, the £50 screening fee is credited towards a full £400 diagnostic assessment if you proceed within 30 days.
Screening is not a compulsory extra before every full assessment. If you are unsure which route would help, discuss the concerns and the purpose of the assessment during the free introductory call.
What should you compare before choosing an assessor?
A lower or higher price does not, by itself, tell you whether an assessment is suitable. Ask what you will receive and whether it answers the questions you need help with.
Qualifications and experience: who will carry out the assessment, and what relevant qualifications and current professional credentials do they hold?
Suitability: does the assessor work with the young person’s age group, and is the proposed setting appropriate?
Scope: is this screening or a full diagnostic assessment, and what areas will it explore?
Written report: is an individual report included in the quoted price?
Recommendations and feedback: will you be able to discuss what the findings mean and the suggested next steps?
Timing: when is the appointment, and when will the report be available?
Total cost: are travel, venue hire or other charges additional?
Booking terms: what deposit, payment and cancellation terms apply?
If you need a report for a particular purpose, check the evidence requirements with the school, college, university or relevant organisation before paying. Do not assume that a diagnosis automatically secures a particular adjustment or funding outcome.
Is it worth paying for an assessment?
An assessment may be useful when reading, spelling or written work remain persistently difficult and you need a clearer explanation of the young person’s strengths and needs. The value lies in understanding the findings and using the recommendations, as well as the diagnostic conclusion.
Start with the question you want answered. What difficulties are occurring? What support has already been tried? What would you hope to do differently after receiving the report? You do not need to be certain that dyslexia is the explanation before discussing whether assessment would be helpful.
Discuss the options before booking
Mark offers a free 15-minute introductory call. Share the young person’s age, the difficulties you have noticed and whether you are considering an online or Bournemouth appointment. You can ask about the process, the £400 fee and whether screening or diagnostic assessment would be appropriate. There is no obligation to book.