Most families come to me with this exact question. And if you’re asking it, you’re probably already paying attention to something that matters. That’s not overreacting. Here’s how to think it through.
Key points at a glance:
- The Mental Capacity Act 2005 says capacity is decision-specific, not a blanket label
- Worrying about Mum is not overreacting – but timing matters
- Certain situations make a formal assessment genuinely necessary
- An independent assessment protects Mum’s rights and reduces family conflict
- Sometimes what’s needed first is a conversation, not a formal report
You’re Not Overreacting. But Let’s Think This Through.
You’ve noticed something. Maybe Mum is repeating herself more. Maybe a big decision is looming and you’re not sure she fully understands it. Maybe your siblings are starting to disagree about what she’d want.
That nagging feeling is telling you something.
The question is: what do you actually do with it?
There is no single answer that fits every family. But there is a clear legal framework that helps us think it through properly, and I use it every time I’m asked this question.
What the Mental Capacity Act Actually Says
Under sections 2 and 3 of the Mental Capacity Act 2005, a person lacks capacity for a specific decision only if two things are both true.
- First, there must be an impairment or disturbance in how their mind or brain is working – dementia, a brain injury, delirium, or severe mental illness, for example.
- Second, because of that impairment, they are unable to understand the relevant information, hold onto it long enough to decide, weigh it up, or communicate a decision in any way.
This is what’s called a functional test. It is not about a diagnosis. A person can have dementia and still have capacity for some decisions, some of the time.
The Act also starts from a clear presumption: we assume a person has capacity unless there is real evidence otherwise. Age, occasional confusion, or making choices others find unwise are not, on their own, grounds for questioning capacity.
When a Formal Assessment Is Likely Needed
In my experience, families usually reach a tipping point for one of a few clear reasons.
A significant legal or financial decision is on the table. Selling or transferring a property, making or changing a will, signing a Lasting Power of Attorney, agreeing to a major change in care arrangements – these are all high-stakes decisions where a formal, documented capacity assessment is often essential.
Professionals are giving mixed messages. A GP says she seems fine. The care home is describing significant confusion. A solicitor won’t proceed without a formal opinion. That gap needs bridging.
Family conflict is starting to build. One sibling suspects manipulation. Another is sure Mum is fine. Mum herself is anxious and caught in the middle. An independent assessment – one that sits outside family dynamics and organisational pressures – can bring clarity and reduce the temperature considerably.
Decisions keep being undone. If Mum agrees to something one day and has no memory of it the next, and this is affecting her safety, finances, or wellbeing, that pattern matters and needs proper assessment.
The Court of Protection is involved. If a COP3 form is required (that’s the standard capacity assessment form used in deputyship applications), or if a solicitor has specifically requested a capacity opinion, then a formal report is not just helpful – it is required.
When You Might Not Need One Yet
Not every situation calls for a full independent assessment straight away, and I think it’s important to be clear about that.
If the decisions Mum is making are everyday, low-risk choices – what to eat, whether to see a friend, how to spend an afternoon – and there is no real dispute or danger, then supporting her well is usually enough at this stage.
If mild forgetfulness is present but she can still understand and weigh up information when it matters, a formal report may not add much right now.
The Mental Capacity Act also expects professionals to take all reasonable steps to help someone decide for themselves before concluding they lack capacity. Sometimes that means simpler language, smaller chunks of information, or more time. I often find that what a family needs first is practical guidance on how to support good decision-making, rather than a formal written report.
Why Independence Matters
When decisions involve property, wills, or long-term care, they are the ones most likely to be challenged later. An independent assessment – completed outside of the local authority and care system – gives solicitors and families a clear, legally sound record.
It also means that the person doing the assessment is not aligned with any one family member, care provider, or council. The focus stays entirely on Mum: her rights, her wishes, and the legal safeguards that exist to protect her.
If she is found to lack capacity for a specific decision, the next step under section 4 of the Mental Capacity Act is a Best Interests process – one that takes her known wishes, values, and feelings seriously, even when she can’t make the decision herself. A good assessment report will map that out clearly.
Not Sure Where to Start?
If you’re reading this and still uncertain, that’s completely understandable. These situations are rarely straightforward.
The most useful first step for many families is simply a conversation – one where we can work out together whether a formal assessment is what’s needed, or whether something else would help more right now.
If you’re worried about Mum and want to think it through with someone who knows this area well, get in touch. There’s no obligation, and no pressure. Just a straight, honest conversation about what’s best for her.
Capacity Assessment Questions & Answers
How do I know if we are overreacting by asking for a capacity assessment?
You are more likely to be overreacting if there is no specific decision on the table, no disagreement, and no clear evidence that your mum struggles to understand or weigh up important information. Where there is a major decision, conflict, or professional uncertainty, seeking clarity under the Mental Capacity Act is usually a sensible protective step rather than an overreaction.
Does Mum need a diagnosis of dementia before anyone can assess her capacity?
No. The Mental Capacity Act 2005 only requires evidence of an impairment or disturbance in the functioning of the mind or brain that affects decision-making, and this can be temporary or permanent. A diagnosis can be helpful, but it is not a legal requirement before applying the MCA capacity test.
Will a mental capacity assessment mean Mum automatically loses control over her life?
No. Capacity is assessed for specific decisions, not “life in general”, and the law requires professionals to assume capacity unless proven otherwise and to support the person to decide wherever possible. Even where she lacks capacity for one decision, she may retain capacity for many others, and any further decisions must follow the best interests framework.
What are the risks of not getting a formal capacity assessment?
Without a clear assessment, important decisions about property, wills, or care can be challenged later, causing delays, legal costs, and family conflict. There is also a risk that your mum’s wishes are not properly understood or recorded, especially if professionals hold different views about her capacity.
Why choose an independent social worker instead of relying on the council or GP?
An independent social worker is not constrained by local authority thresholds, time limits, or organisational pressures, and can spend the time needed to understand your mum as an individual. For families and solicitors, an independent, legally literate report offers added reassurance that the assessment is unbiased, thorough, and suitable for use in Court of Protection or legal processes if required.
