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Author and Publication
Author: Nellie Supports Ltd
Publication Date: 15/05/2026
Citation
Mental Capacity Act 2005, c. 9. Available at: https://www.legislation.gov.uk/ukpga/2005/9/contents
Copywright
Copyright © 2026 Nellie Supports Ltd. All rights reserved.
This article is made available for general information, education and professional reference. It may be downloaded, printed and shared for non-commercial purposes, provided that it is reproduced in full, is not altered in any way, and is properly cited as the work of Nellie Supports Ltd. This material must not be edited, adapted, sold, republished, incorporated into commercial products, or used for commercial training, assessment, report-writing or advisory services without prior written permission from Nellie Supports Ltd.
This article does not constitute legal advice, clinical advice or a substitute for a decision-specific professional assessment. Where legislation, government guidance, court forms or external professional materials are referred to, those materials remain subject to their own copyright, licensing and re-use terms.
Types of testamentary assessments
Testamentary capacity assessments come in four main types: prospective assessments completed before a will is signed, contemporaneous assessments carried out around the time of execution, retrospective assessments looking back at capacity at a past date, often after death, and enhanced assessments for complex or contested circumstances where the report must withstand litigation scrutiny. Choosing the right type early prevents the most expensive problem in this area, which is discovering after a dispute has started that the wrong kind of evidence exists. This guide explains each type, when it applies and how they differ in depth and cost.
Testamentary assessments are not all the same
The right type of testamentary assessment depends on timing, purpose, risk and evidence. A person making a straightforward will may need a different level of assessment from someone changing a will in later life, excluding close relatives, managing a complex estate or already involved in a dispute.
Apply the right legal test
Whatever type of assessment is used, the core issue is whether the person has testamentary capacity for the will decision. The assessment should address the nature and effect of making a will, the broad extent of the estate, the people who may have claims, and whether any disorder of the mind affects the decision.
Prospective testamentary capacity assessment
A prospective assessment is completed before the will is signed or changed. This is often the best option where there are known capacity concerns, diagnosis, communication difficulties, high-value assets, family conflict, pressure concerns or a departure from previous wills.
Contemporaneous assessment during the will process
A contemporaneous assessment is closely linked to the will-making appointment and may sit alongside solicitor attendance notes. It can be useful where the solicitor needs independent support at the time instructions are being taken and the will is being executed.
Retrospective testamentary capacity assessment
A retrospective assessment is completed after the relevant event, often after death, where a will is being challenged or questioned. It relies on historical evidence such as medical records, solicitor notes, previous wills, witness accounts, care records and correspondence. It cannot recreate the assessment that should ideally have happened at the time.
Assessments involving undue influence concerns
Where pressure or coercion is suspected, the assessment should be arranged with particular care. The person should be able to speak privately, the assessor should record who was present, and the report should explain how influence risk was considered without pretending to decide the legal issue of undue influence.
Assessments for complex estates
Complex estate assessments may involve trusts, businesses, overseas assets, agricultural property, blended families, dependent relatives or vulnerable beneficiaries. The assessment should identify what information the person needed to understand in broad terms and how that information was explained.
Choosing the right assessment type
The right assessment type should be chosen before booking. Consider whether the decision is live or historical, whether the will is likely to be disputed, whether medical evidence is needed, whether the estate is complex and whether a solicitor or court may later rely on the report.
Key takeaway
The best type of testamentary assessment is the one that matches the timing, risk and intended use of the opinion. A simple assessment may be enough for some cases. Complex, disputed or high-risk cases need a more detailed and carefully scoped approach.
Frequently asked questions
What are the main types of testamentary assessments?
Common types include prospective assessments before a will is signed, contemporaneous assessments during the will process, retrospective assessments after death, enhanced assessments for complex or disputed cases and specific assessments where undue influence or coercion risk must be considered.
Which type is best before making a will?
Where concerns are known before the will is signed, a prospective or contemporaneous assessment is usually preferable because it allows direct assessment of the person at the relevant time and better recording of support, understanding and reasoning.
When is a retrospective assessment needed?
A retrospective assessment may be needed after death or after a disputed will decision, especially where there are concerns about diagnosis, suspicious circumstances, sudden will changes, missing records or disagreement between beneficiaries.
Related mental capacity assessment pages
These internal links help readers move from this guide to the most relevant Nellie Supports service page, assessment option or legal framework page.
Not sure which testamentary assessment you need?
Nellie Supports completes testamentary capacity assessments across England and Wales, prospective, contemporaneous and retrospective, through a permanent employed team with every report peer reviewed before delivery. Call 0333 987 5118 or visit the testamentary capacity assessment service page.