Mental Capacity Assessment
Retrospective Mental Capacity Assessment
A retrospective mental capacity assessment is an expert opinion about whether a person had the mental capacity to make a particular decision at a point in the past. It reconstructs decision-making ability from the evidence of the relevant time, such as medical records, professional documentation and witness evidence. It applies the legal test to the decision in dispute: the Mental Capacity Act 2005 for most living-person matters and Banks v Goodfellow in will disputes after death.
Court-ready retrospective capacity reports for disputed past decisions, across England and Wales.
At a glance
Decision
Capacity for a specific decision at a date in the past
Legal framework
Mental Capacity Act 2005, section 2(1)
Format
Desktop assessment, no visit required
Report
Court-ready and peer reviewed
Coverage
England and Wales
£3,500 + VAT
Scope and fee confirmed at triage
Dependent upon application
Turnaround
England and Wales
Nationwide coverage
CPR Part 35
Court-ready reporting
Plain-English explanation
What is a mental capacity assessment?
A mental capacity assessment is a decision-specific and time-specific process used to determine whether a person can make a particular decision for themselves. Under the Mental Capacity Act 2005, the assessor considers whether the person can understand, retain, use or weigh the relevant information, and communicate their decision. A person can only be found to lack capacity where an impairment of, or disturbance in, the functioning of the mind or brain causes their inability to decide. It is not a general test of intelligence, memory or diagnosis, and every practicable step must first be taken to support the person to make the decision.
A retrospective assessment asks that same question about a date in the past: whether the person had capacity for a particular decision at the time they made it. Section 2(1) of the Act frames capacity at the material time, which is why the date and the decision both have to be defined before the work starts.
It is a desktop assessment. The opinion is reconstructed from contemporaneous records and accounts rather than from meeting the person, which is often the only route available where the person has since died or lost capacity.
An unwise decision is not the same as lacking capacity
A decision that looks surprising in hindsight, or that disadvantaged the person, is not evidence that they lacked capacity when they made it. The question is whether they could make that decision at that time, not whether it turned out well.
Common situations
When you may need a retrospective assessment
A retrospective mental capacity assessment may be needed when a decision made in the past is now being challenged, and there is no clear, reliable or sufficient evidence of capacity from the time. The key question is not what the person can decide now, but whether they had the capacity to make that specific decision at the time it was made.
This commonly arises in will and probate disputes, Court of Protection matters, insurance and personal injury claims, disputed financial or property transactions, and cases involving healthcare decisions such as consent to or refusal of treatment. Many retrospective cases arise precisely because there was no formal capacity assessment at the time, which does not make the analysis impossible, but does mean the report must be especially careful about the reliability of each source and the limits of the evidence.
A will is being challenged
A will is disputed and evidence is needed about whether the testator had capacity when it was made.
A gift or transfer is questioned
Money or property changed hands and there is a question about whether the person could make that decision at the time.
A contract or transaction is disputed
An agreement, sale or financial transaction is being unwound and capacity at the date of signing is in issue.
An LPA or deputyship is questioned
There is a challenge to whether the donor had capacity when the instrument was made or registered.
The person has died
The person is no longer available to be assessed and the records are the only remaining evidence.
The person has since lost capacity
The person's condition has changed materially since the date in question, so a current assessment would answer the wrong question.
Decision-specific content
What this assessment covers
This assessment addresses whether the person had capacity for a specific decision at a defined point in the past. Section 2(1) of the Mental Capacity Act 2005 frames capacity at the material time, so the date and the decision are fixed at the outset and the opinion is anchored to them. The opinion is given on the balance of probabilities, and it remains for the court to determine capacity. The work typically establishes:
The specific decision in question, and the date or period over which it was made
What information was relevant to that decision, judged by the test that applied to it
What the contemporaneous records show about the person's presentation at and around that date
Whether an impairment of, or disturbance in, the functioning of the mind or brain was present at that time
Whether that impairment caused an inability to make that particular decision, rather than simply coexisting with it
Whether the person's presentation fluctuated, and what that means for the date in question
The records set the limits of the opinion
A retrospective opinion can only be as strong as the material behind it. Where the records are thin or silent on the date in question, the report says so and explains what could and could not be concluded, rather than filling the gap. An expert opinion that overstates what the evidence supports is worth less than one that marks its own limits.
1
The test for the decision and date
The framework depends on the type of decision and the context in which the report is used, but the core principle is always the same: capacity is assessed by reference to the specific decision and the relevant time. Depending on the matter, the framework may be:
The capacity test applicable to the particular decision, date and legal context
The Mental Capacity Act where applicable, or the relevant common law test
Banks v Goodfellow where testamentary capacity is the issue
CPR Part 35 and Practice Direction 35 for civil expert reporting, separately from the capacity test
2
Reconstructing capacity from the evidence
A diagnosis on its own is not enough, and neither are vulnerability, unusual behaviour, family disagreement, or the fact that the person later lost capacity. What matters is whether the report applies the correct legal test to the specific issue, focuses on the exact decision and time, and explains the reasoning clearly and independently.
Framework: Mental Capacity Act 2005; Banks v Goodfellow (1870) LR 5 QB 549 for testamentary matters; CPR Part 35 and Practice Direction 35 for expert evidence in litigation.
For the framework in full, read our guide: assessing capacity at a historical date.
Legal framework
The legal framework for retrospective capacity
Initial enquiry and triage
We discuss the background, the decision being challenged, the relevant time period, and what the report is needed for, confirming whether a retrospective assessment is appropriate and the likely scope.
Evidence gathering and document review
Once instructed, we identify and review the key material from the relevant period, including medical records, care notes, legal documents, correspondence, witness evidence and safeguarding material.
Analysis of the decision and relevant evidence
We analyse the evidence against the correct legal framework, considering the specific decision, the relevant information, any impairment, and whether the person was likely able to understand, retain, use or weigh the information and communicate a decision at that point.
Report preparation
A detailed report is prepared, setting out the evidence considered, the legal and professional framework applied, the reasoning followed, and the expert opinion reached, written for confident use in legal or formal settings.
Peer review and secure delivery
Before delivery, the report is reviewed internally for clarity, balance and quality assurance, then provided securely, with clarification available for the next stage of the matter.
What happens next
Our retrospective assessment process
Working from the records
How we support decision-making
The Mental Capacity Act 2005 requires that no one is treated as unable to make a decision unless all practicable steps to help them have been taken without success. That support is built into every assessment:
Plain language and real examples
Decisions are explained using the person's own circumstances and the decision actually in front of them, rather than abstract scenarios.
The right time and place
Appointments are arranged for when the person functions best, at home, in a care setting, in hospital or remotely.
A familiar person nearby
A relative, friend or carer can be close at hand where that reassures, while the assessment itself remains independent.
Communication adjustments
More time, information broken into stages, and written notes or aids where they help the person express a view.
Evidence base
Evidence we review
The assessment is built entirely from the documentary record and the accounts of those who were there. This typically means reviewing:
Medical records
GP and hospital records spanning the relevant period, including any cognitive testing carried out at the time.
The document or transaction itself
The will, deed, agreement or instrument in question, and the instructions that led to it.
Attendance notes and correspondence
Solicitors' file notes are often the single most valuable record of how the person presented on the day.
Financial records
Bank statements and transaction histories that show how the person was managing around the relevant date.
Care and support records
Care plans and daily notes from the period, which often capture fluctuation that clinic letters miss.
Accounts from people who were there
Statements from family, friends and professionals who saw the person at or near the material time.
Deliverable
What the assessor evaluates
A strong retrospective assessment explains not just the conclusion, but how it was reached from the available evidence, in a way that is balanced and defensible.
The exact decision being disputed and the relevant date or timeframe
The contemporaneous records reviewed, closest in time to the decision
What relevant information the person needed to understand for that decision
Evidence of any impairment or disturbance in the functioning of the mind or brain
The person's likely ability to understand, retain, use or weigh the information
Their likely ability to communicate a decision at that time
Factors such as delirium, dementia, brain injury, medication, grief, depression or coercion
What is shown directly, what is inferred, and where the limits of the evidence lie
Assessment option | Suitable for | What is included |
|---|---|---|
Standard Assessment | Most retrospective capacity questions | |
Enhanced Assessment (EMCA) | Contested, high-value or high-risk matters | |
Court-specific instruction | Court of Protection or other proceedings |
Who we work with
For solicitors, deputies and other professionals
Instruction is straightforward and the evidential standard is consistent whichever decision is being assessed:
Scope confirmed in writing
The decisions to be assessed, the fee and the timescale are confirmed in writing before instruction.
A traceable evidential line
Evidence, analysis and conclusion are set out in a structure a court, bank or public body can scrutinise.
Peer review as standard
A second qualified professional reviews every report before it leaves the practice.
Follow-up clarification
Clarification for instructing parties is included after the report is delivered.
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Transparent pricing
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For families
A clear fee, stated before instruction and confirmed in writing, with VAT and any travel set out up front. Where an assessment visit is required, your report is delivered within 5 working days of that visit only, in a form solicitors and the courts can rely on. Where the work is records-based, the timescale is confirmed at instruction.
For professionals
A permanent, employed multidisciplinary team, not an ad hoc associate or referral-panel model: Social Work England and Social Care Wales registered social workers and a Chartered Psychologist (BPS). Every report is peer reviewed by a second qualified professional and structured for scrutiny, with reports relied on in the Court of Protection, the Family Court and the Court of Appeal.
Provider evidence
Why choose Nellie Supports for your mental capacity assessment
England and Wales' largest identified specialist private social work and mental capacity assessment practice, with over 11,000 formal assessments and reports completed by a permanent full-time multidisciplinary team.
Why families, solicitors and professionals choose Nellie Supports
Decision-specific, not generic
We focus on the actual decision in dispute, the exact time period, and the available evidence, not a general comment on someone's health.
Grounded in contemporaneous evidence
The opinion is anchored in the records and material closest in time to the disputed decision.
Clear about fact, opinion and inference
We distinguish what the records show, what witnesses recall, what can be inferred, and where the limits lie.
Built for scrutiny
Suitable for probate, Court of Protection, litigation and disputed transaction contexts, structured with expert evidence standards in mind.
Precise, not overstated
Credibility in retrospective work comes from precision, so the report says clearly what can and cannot be concluded.
Multidisciplinary quality assurance
A multidisciplinary practice with structured internal peer review before every report is delivered.
The situation
After an elderly man died, his family challenged a Will he had made a few months before his death, while he was in hospital with a serious illness. There had been no formal capacity assessment at the time, and the executors needed an independent opinion on whether he had testamentary capacity when the Will was made.
The approach
The assessment was records-led. We reviewed the hospital and GP records, the solicitor's attendance notes, the Will and any earlier versions, and the wider evidence from around the relevant date, applying the Banks v Goodfellow test to that specific decision at that specific time.
The outcome
The report set out clearly what the evidence supported, what could only be inferred, and where the limits of the evidence lay, reaching a reasoned, balanced opinion the parties could rely on. Retrospective reports carry weight precisely because they are careful about certainty, rather than overstating it.
This is an illustrative example, drawn from the common features of the retrospective assessments we carry out. It does not describe any individual client.
How this works in practice
Frequently asked questions
Retrospective capacity FAQs
Do you need to meet the person for a retrospective assessment?
Usually, no. A retrospective assessment is primarily based on evidence from the relevant time rather than current presentation. The key material comes from medical records, care notes, legal documents and witness evidence. Where useful, a present-day assessment can be added for context, but the core opinion focuses on the past decision.
What happens if the records from the time are incomplete?
Incomplete records do not necessarily prevent a retrospective assessment, but they affect how far the opinion can go. The assessor looks carefully at the quality of the available evidence, and a good report is clear not only about what the evidence supports, but also where there are gaps, limits or uncertainty.
Can it help if there was never a formal assessment at the time?
Yes. That is one of the most common reasons these assessments are needed. Where no formal assessment was completed, the task is to reconstruct likely decision-making ability from the surrounding evidence, providing a structured, independent opinion where the original evidence was missing or unclear.
Is this the same as a testamentary capacity assessment?
Not always. A testamentary capacity assessment is specifically about capacity to make a will. A retrospective assessment is broader and can apply to many past decisions. Where the issue is a disputed will, the retrospective report may deal with testamentary capacity, but retrospective work is not limited to probate matters.
Can the report comment on undue influence or coercion?
It can consider evidence of pressure, coercion, vulnerability or possible undue influence where relevant to the person's ability to make the decision. However, it stays clear about the difference between assessing capacity and determining wider legal issues, which may ultimately be for the court to decide.
Will the report be suitable for court use?
Yes, where it is prepared for that purpose. Retrospective reports are often used in probate disputes, Court of Protection matters and civil litigation. A strong report is clear, independent, properly reasoned, and focused on the actual issue the court or parties need answered.
Where do you cover?
Assessments are carried out across England and Wales, at home, in care settings, in hospital or remotely where appropriate. Travel is charged at £40 per hour and confirmed before booking.
Who will carry out the assessment?
A registered professional from our permanent, employed team, which includes Social Work England and Social Care Wales registered social workers and a Chartered Psychologist (BPS). Every report is peer reviewed by a second qualified professional before delivery.
What is a retrospective mental capacity assessment?
The decision, the evidence and the opinion explained
Assessing capacity at a historical date
How experts reconstruct capacity from the records
Evidence needed for a retrospective capacity opinion
What material strengthens the opinion
Retrospective capacity in disputed transactions and wills
Applying the right test to the right decision
Limits of retrospective mental capacity evidence
What retrospective evidence can and cannot show
Supporting guidance
Retrospective capacity guides
Testamentary capacity assessment
For making or amending a Will, applying the Banks v Goodfellow test.
Statutory will assessment package
Court-ready evidence package for a Court of Protection statutory will application.
COP3 mental capacity assessment
For Court of Protection deputyship applications.
Other assessment types
Discuss the instruction
Discuss a retrospective assessment
Tell us about the disputed decision, the key date and what the report is needed for, and we will confirm scope, fee and turnaround at triage.
Written by Ben Slater, Founder and Managing Director, Nellie Supports. Read our editorial policy.