When to get power of attorney — the window is smaller than you think
Reviewed by a licensed elder law educator | Updated March 2026
The time to get a power of attorney is while your parent is mentally sharp and no one can question their capacity. Once cognitive decline begins, the document becomes vulnerable to legal challenge. The window between "we should do this eventually" and "it's too late" is shorter than most families expect, and it closes without warning.
Right Now Is the Right Time
The idea is usually the same. You'll do this later. When your parent seems like they might need help. When there's a sign that something's changing. When there's time. Later becomes never, because the window for getting a power of attorney prepared is surprisingly small and slams shut fast.
The optimal time to get a power of attorney is right now, while your parent is completely mentally capable and willing to sign. Not when there are signs of decline. Not when something is happening. Now. The Alzheimer's Association reports that an estimated 6.9 million Americans aged 65 and older are living with Alzheimer's dementia, and many more have mild cognitive impairment that has not yet been diagnosed. The ABA's Commission on Law and Aging emphasizes that cognitive decline often progresses in ways that are invisible to families until the window for valid legal documents has already narrowed.
A power of attorney is only valid if your parent had legal capacity when they signed it. Capacity means your parent understood what they were signing, understood what authority they were giving you, and understood the consequences. If there's a question about whether your parent had capacity, the entire document can be challenged and rendered invalid.
This is where timing becomes everything. Your parent at seventy with no health problems has clear capacity. Your parent at eighty-five with early memory loss has questionable capacity. Your parent with early dementia who can still handle daily activities might have capacity for some decisions but not others. Capacity is not all-or-nothing. It's specific to the decision being made. Someone might have capacity to decide whether to eat lunch but not to decide whether to refinance their mortgage.
Once there's any indication of cognitive decline, a power of attorney signed afterward can be challenged. The moment a question exists, the document becomes vulnerable. If there's a family conflict or a financial dispute, someone can argue your parent didn't have capacity when they signed, and a court will have to decide. Doctors sometimes call this the "window of capacity." Once it starts to close, getting a new power of attorney becomes much riskier. If your parent is already being treated for dementia or cognitive decline, a court could question whether they had capacity to sign.
The Signs That the Window Is Closing
These aren't catastrophic signs. Your parent doesn't have to be unable to recognize you or unable to live alone. But they're signs that the time to get documents done is now, not later.
Forgetting recent events or repeating the same question multiple times. Struggling to find words or getting confused about what month or year it is. Getting lost in familiar places. Having trouble managing finances or forgetting to pay bills or paying bills twice. Becoming confused about medication. Having trouble following conversations or losing the thread of what people are saying.
These things happen to everyone sometimes. A bad day, too much stress, not enough sleep. But if they're happening regularly and they're new, they're worth paying attention to. Another sign: when your parent starts asking you to help with things they've always done themselves. They want you to go with them to the bank. They want help with taxes. They ask you to look over insurance paperwork. This doesn't necessarily mean they've lost capacity. But it's a sign that the time to act is now.
According to the Alzheimer's Association, the average time between the first symptoms of Alzheimer's and a formal diagnosis is two to three years. That means by the time many families recognize the problem, the window for unquestionable legal documents may already be narrowing.
What Happens If You Wait
Your parent has a stroke. They're hospitalized. They're conscious but can't speak and can't move much. The doctors want to know whether to pursue aggressive rehabilitation or comfort care. You don't have a healthcare power of attorney. The hospital says you're not authorized to make decisions. You need to go to court for guardianship. This takes days or weeks. In the meantime, care decisions are made by the medical team based on their judgment, not your parent's values or wishes.
Your parent develops dementia. By the time you realize what's happening, your parent can't reliably communicate or understand what you're telling them. They can no longer sign legal documents. You need authority to manage their finances, but you can't get a power of attorney because capacity is gone. You go to court. You prove to a judge that your parent is incapacitated. The court appoints an evaluator. There's a hearing. It's public. It's invasive. It costs thousands of dollars in legal fees. And when it's done, you have only what the court decides you can do, not what your parent would have chosen.
With a power of attorney, your parent gets to decide what authority you have. With guardianship, a judge decides. That is the difference between planning and reacting.
Or another scenario: your parent is still capable but has stopped managing their finances. Bills aren't being paid. Investment decisions aren't being made. Your parent is aware and functional but just can't handle this part of life anymore. Without a financial power of attorney, you can't do anything. You can't pay their bills. You can't access their accounts. You're watching things fall apart with no legal authority to fix it.
Cognitive Decline Is Gradual and Then Sudden
One of the hardest things about aging is that cognitive change is gradual right up until it's sudden. Your parent is fine for months and then one day they're not. They have a good day and a bad day and you can't tell where the line is. They're functional enough to live at home but not functional enough to make complex financial decisions.
The window closes without a clear moment when it closes. You don't get a day when your parent is definitely capable and the next day they're definitely incapacitated. You get a slow drift, and at some point on that drift, the window is closed, even though your parent is still doing fairly well in other ways.
This is why "later" is the wrong answer. Later is when you can't do this anymore.
What To Do Right Now
If your parent is in good health and good cognitive shape, this is the time. Call an attorney who does elder law or estate planning. Tell them you want your parent to have a healthcare power of attorney and a financial power of attorney. Your parent will come in, the attorney will talk through what authority your parent wants to give you, the documents will be drafted, your parent will sign them, and they'll be notarized. The whole thing takes a few hours spread over a couple of appointments. The cost is usually a few hundred dollars, a fraction of what guardianship proceedings cost.
If you notice any signs of cognitive change, don't wait. That's your signal. Call the attorney now. Don't wait to see if it gets better or worse. Have your parent see their doctor. Tell the doctor you're concerned about memory or cognitive changes. Some doctors will write a letter confirming your parent has capacity, which gives you documentation in case there's ever a challenge later.
If your parent is resistant to having this conversation, be clear about why it matters. You're not saying they need help managing their life now. You're saying that if something unexpected happens, you want to be able to help without court involvement. Frame it as preparation, not prediction. You have car insurance even though you hope you never crash. A power of attorney is the same thing.
If your parent refuses entirely, that's ultimately their choice. But you've done your part by raising it. At least you know the question has been asked, and if something happens later, you won't be wondering if you should have brought it up sooner.
Many families wait until there's a crisis. Someone has a stroke or a fall or is diagnosed with dementia. Then they call a lawyer in a panic. The lawyer has to move fast. The family is stressed. Your parent might not be in a position to sign valid documents. Compare that to doing it now, when it's calm and planned and nobody's in crisis. Your parent is sitting at a lawyer's desk making decisions about their own future. They're not under stress. Nobody's pushing them. The documents are clear and nobody can argue they were signed under duress or without capacity. The window for that kind of calm, planned, unchallengeable document is right now.
Frequently Asked Questions
At what age should my parent get a power of attorney?
Every adult should have one regardless of age, but the urgency increases after 65. The ABA recommends that power of attorney documents be part of every adult's basic estate plan. If your parent is over 65 and doesn't have one, the time is now.
Can my parent sign a power of attorney if they have early-stage dementia?
Possibly. Capacity is assessed at the time of signing, and some people with early-stage dementia retain enough understanding to sign legal documents. A physician's letter confirming capacity at the time of signing provides important protection against future challenges. An elder law attorney can evaluate whether your parent's current cognitive state is sufficient.
What if my parent already signed one years ago?
Review it. Make sure it's still current, names the right people, and complies with current state law. If it's more than five years old, or if there have been major life changes, discuss updates with an attorney. An existing document is better than nothing, but an outdated one can create problems.
What if I'm not sure whether my parent still has capacity?
Ask their physician for a capacity assessment. Some physicians do this routinely when families are pursuing legal documents. The assessment provides documentation that your parent understood what they were signing, which protects the document from future challenges.
How long does it take to get a power of attorney?
From calling an attorney to having signed, notarized documents, the process usually takes one to three weeks. The attorney drafts the documents, your parent reviews and signs them, and they're notarized. Compare this to guardianship, which takes weeks to months and costs thousands more.
Can my parent sign a power of attorney in the hospital?
Technically yes, if they have capacity. But documents signed during a health crisis are more vulnerable to challenge. If your parent is hospitalized and still has capacity, it's better than nothing, but a document signed during a calm, planned appointment is much harder to contest. A physician's note confirming capacity at the time of signing becomes especially important in a hospital setting.