A power of attorney and a healthcare proxy both let someone act for you when you can’t act for yourself, but they cover different parts of your life. A power of attorney handles money and property — paying bills, managing accounts, signing documents. A healthcare proxy handles medical decisions — treatments, surgeries, care settings. Most people need both, because one does not authorize the other.
That distinction sounds simple, but it trips up almost everyone, partly because the terms overlap and partly because every U.S. state uses slightly different names and rules. Below is a clear breakdown of what each document does, when it kicks in, when it ends, and how to actually put them in place.
What is a power of attorney?
A power of attorney (POA) is a legal document in which you (the “principal”) give another person (your “agent” or “attorney-in-fact”) the authority to act on your behalf. Despite the name, your agent does not need to be a lawyer — it is usually a spouse, adult child, sibling, or trusted friend.
The most common type for planning purposes is a durable financial power of attorney. “Durable” means the authority survives your becoming incapacitated, which is the entire point — you want someone able to step in precisely when you no longer can. A durable POA lets your agent do things like:
- Pay your mortgage, rent, and household bills
- Access and manage bank and investment accounts
- File your taxes
- Manage real estate and sign contracts
- Deal with insurance companies and government benefits
There are narrower versions too. A limited (or special) power of attorney grants authority for one specific task or time period — signing paperwork on a house sale while you’re traveling, for instance. A general power of attorney is broad but typically ends if you become incapacitated, which is why the durable version is the one most planners recommend.
Does a power of attorney cover medical decisions?
No. A standard financial power of attorney does not give your agent authority over your medical care. If your agent tries to make a treatment decision on the strength of a financial POA, a hospital will not honor it.
Medical authority comes from a separate document. Depending on your state, it’s called a healthcare proxy, a medical power of attorney, or a healthcare power of attorney — different labels for the same core idea. Some states use a single combined advance-directive form that includes both medical decision-making and end-of-life wishes, but the medical authority itself is always distinct from financial authority. Naming someone to manage your money does not, by itself, let them make choices about your health.
What is a healthcare proxy?
A healthcare proxy is a document that names a person (your “healthcare agent”) to make medical decisions for you when you are unable to make or communicate them yourself. This includes decisions about:
- Consenting to or refusing treatments and procedures
- Choosing doctors, hospitals, or care facilities
- Managing pain relief and comfort care
- Making end-of-life decisions consistent with your wishes
The key limitation: a healthcare proxy only has power while you are alive and unable to decide for yourself. As long as you can speak for yourself, you stay in control of your own care. Your agent isn’t looking over your shoulder — they step in only when a physician determines you’ve lost the capacity to decide, and they step back if you recover.
What is a living will vs. a healthcare proxy?
These two often get lumped together, but they do different jobs.
A living will is a written statement of your own wishes — mainly for end-of-life situations. It might say whether you want to be kept on a ventilator, receive artificial nutrition, or be resuscitated if your heart stops. It speaks your instructions directly, but it can’t cover every situation that might come up.
A healthcare proxy names a real person to make decisions in the moment, applying judgment to situations your living will never anticipated. Think of the living will as your written instructions and the proxy as the person authorized to read them, interpret them, and act when the instructions run out.
In many states, both live inside a single document called an advance directive or advance healthcare directive. Having a living will without a proxy leaves gaps; having a proxy without a living will leaves your agent guessing about your values. Together they cover far more ground than either does alone.
Power of attorney vs. healthcare proxy: side-by-side
| Power of Attorney (financial) | Healthcare Proxy | |
|---|---|---|
| What it covers | Money, property, legal, and financial matters | Medical and healthcare decisions |
| Domain | Financial | Medical |
| Who you name | An agent / attorney-in-fact (spouse, adult child, trusted person) | A healthcare agent (spouse, adult child, trusted person) |
| When it takes effect | Immediately when signed, or on incapacity if written as “springing” (durable POAs commonly take effect at signing and continue through incapacity) | Only when a physician determines you can’t make or communicate medical decisions |
| While you’re capable | You can still act for yourself; a durable POA lets your agent act alongside or for you | You stay fully in charge of your own care; the agent has no authority |
| When it ends | Ends at your death (also revocable while you’re competent) | Ends when you regain capacity, and fully at your death |
| Common companion document | Will and estate plan | Living will / advance directive |
When does each one take effect?
This is where the difference gets practical.
A durable financial power of attorney often takes effect the moment it’s signed, and it stays in force if you later become incapacitated. Some people prefer a “springing” power of attorney, which only activates once a doctor certifies that you’re incapacitated. Springing POAs feel safer to some, but they can slow things down, because your agent may have to obtain medical certification before a bank will cooperate. Which approach is wiser depends on your circumstances and your state’s rules.
A healthcare proxy, by contrast, is almost always dormant until you lose the ability to make or communicate medical decisions. A physician makes that determination. Until then, your doctors take direction from you, not your agent.
So in a typical scenario: if you’re temporarily unconscious after surgery, your healthcare agent authorizes treatment while your financial agent keeps the mortgage paid. When you wake up and can decide for yourself again, the healthcare agent’s authority pauses, while the financial POA — if durable and effective at signing — may simply continue.
Does a power of attorney end at death?
Yes, and this catches many families off guard. A power of attorney, including a durable one, ends immediately at the moment of death. It cannot be used to pay for the funeral, close bank accounts, sell the house, or settle the estate.
The same is true of a healthcare proxy — once the person has died, there are no more medical decisions to make, so the proxy’s authority is over.
After death, authority shifts to a different role entirely: the executor named in the will, or, if there’s no will, an administrator appointed by the probate court. This is exactly why a power of attorney is not a substitute for a will. If you want to understand what documents your family will actually need at that stage, see our guide on documents needed after the death of a parent.
Do I need both — and can one person do both jobs?
For most adults, having both a durable financial power of attorney and a healthcare proxy is worthwhile. Consider what happens without them. If you become incapacitated with no power of attorney in place, your family generally cannot simply take over your finances. They may have to petition a court to be appointed guardian or conservator — a process that is slow, public, expensive, and stressful, often arriving at a moment when your family is already overwhelmed. Having the documents in advance avoids all of that.
You can name the same person for both roles or different people. Many couples name each other for both. But the skills don’t always overlap. The relative who’s calm and clear-headed at a hospital bedside isn’t necessarily the one who’s organized with money, and vice versa. It’s perfectly reasonable to give financial authority to one person and medical authority to another, and to name backups (alternate agents) in case your first choice is unavailable.
A few things worth deciding while you’re at it: who your alternates are, whether your financial POA should be effective immediately or springing, and whether you want to add a living will so your healthcare agent has written guidance. If you’re organizing these documents for an aging parent or someone you care for, our caregiver document checklist walks through the full set to gather.
How do I set up a power of attorney and a healthcare proxy?
The process is more approachable than most people expect:
- Decide who you trust. Choose your financial agent, your healthcare agent, and at least one alternate for each. Talk to them first — being someone’s agent is a real responsibility, and they should agree to it.
- Use the right forms for your state. Both documents are governed by state law, and requirements vary. Many states publish official statutory forms for financial POAs and advance directives. An estate-planning attorney can prepare them, and for straightforward situations, reputable state or nonprofit forms may be enough.
- Sign with the required formalities. Most states require signing in front of a notary, witnesses, or both. Getting this step wrong is one of the most common reasons a document is later rejected, so follow your state’s rules exactly.
- Talk through your wishes. Especially for healthcare, tell your agent what matters to you. A living will helps, but a real conversation matters more.
- Store them where they can be found — and share copies. A power of attorney sitting in a safe nobody can open helps no one in an emergency. Give copies to your agents, and give your healthcare proxy to your doctor or hospital.
That last step is where many careful plans fall apart. Documents get signed, filed, and forgotten, and when the emergency arrives, no one knows where they are. Keeping your power of attorney, healthcare proxy, advance directive, and insurance information organized and reachable is part of what LifeVault is built for — scanning these documents into structured records on your iPhone so the right person can find them when it matters. Everything stays on your device unless you choose to share it.
A note on state variation and legal advice
The names, rules, and formalities for these documents differ from state to state. What’s called a “healthcare proxy” in New York is a “medical power of attorney” or “healthcare power of attorney” elsewhere, and the details of witnessing, notarization, and when authority begins vary too. A document valid in one state may need to be re-executed if you move.
This article is general information, not legal advice. For documents that fit your situation and comply with your state’s law, consult a licensed estate-planning attorney where you live. Getting these in place — correctly, and before you need them — is one of the most practical gifts you can give the people who may one day have to step in for you.