A power of attorney lets one person make decisions on behalf of another
A power of attorney is a legal document that gives another person the right to act for you — to sign documents, manage money, make healthcare decisions, or handle property in your name. The person who signs the document is called the principal. The person who receives the power is called the agent or attorney-in-fact (the title has nothing to do with lawyers).
The agent can only do what the document says they can do. If you write a power of attorney that covers only your bank account, the agent cannot sell your house or make medical decisions. The scope is entirely up to you — you decide what powers you grant and to whom.
A power of attorney takes effect either when ready when you sign it or at a future date you choose. It ends when you die, when you revoke it in writing, or on a date you set in the document itself.
Key Takeaways
- A power of attorney is a written permission that lets someone else handle specific tasks — money, property, or medical decisions — in your name.
- You control exactly what powers you give: you can limit it to one bank account or make it broad enough to cover all your finances.
- The document takes effect when ready or on a date you choose, and it ends when you die, revoke it, or reach a date you set.
- Different types exist for different purposes: financial powers of attorney, healthcare powers of attorney, and limited powers for single tasks.
- The person you name as agent has a legal duty to act in your best interest and to keep records of what they do with your money or property.
Financial powers of attorney let someone manage your money and property
A financial power of attorney gives your agent the right to handle your bank accounts, pay your bills, sell property, file taxes, manage investments, or collect money owed to you. You can make it broad — covering everything — or narrow it down to one specific account or task.
This type is useful if you are traveling for months and need someone to pay your mortgage, or if you are becoming less able to manage finances and want to name someone you trust to take over gradually. It is also useful if you are in the hospital and need someone to access your accounts to pay medical bills or household expenses while you recover.
A financial power of attorney can be durable, which means it stays in effect even if you become mentally unable to make decisions. A non-durable power of attorney ends if you lose mental capacity. Most people choose durable because the whole point is often to have someone step in if you cannot.
Healthcare powers of attorney let someone make medical decisions for you
A healthcare power of attorney (also called a healthcare proxy or medical power of attorney) gives your agent the right to make medical decisions if you cannot. This includes decisions about surgery, medication, life support, nursing home placement, and end-of-life care.
The agent must follow any written instructions you leave — for example, if you write that you do not want life support, the agent cannot override that. If you leave no written instructions, the agent decides based on what they think you would have wanted.
This document is separate from a financial power of attorney. You can name the same person for both, or different people. Many people name a spouse or adult child for healthcare decisions and a different person (like an accountant or sibling) for financial matters.
Limited powers of attorney cover one specific task or time period
A limited power of attorney gives your agent permission to do one specific thing: sell a particular piece of property, sign a contract on your behalf, handle a real estate closing, or manage a single bank account. Once that task is done, the power ends automatically.
This type is common when you cannot be present for a closing or signing. For example, if you are selling a house but will be out of the country on closing day, you can give a limited power of attorney to an attorney or trusted person to sign the deed in your place.
Limited powers of attorney are also used for one-time financial tasks: collecting an inheritance, cashing a check, or filing a specific insurance claim. The agent has no authority beyond what the document describes.
What your agent can and cannot do
Your agent can only do what the power of attorney document says. If it does not mention selling real estate, your agent cannot sell your house. If it does not mention healthcare, your agent cannot make medical decisions. The document is the boundary.
Your agent has a legal duty called fiduciary duty, which means they must act in your best interest, not their own. They cannot steal from you, hide money, or use your accounts for personal gain. They must keep records of what they spend and be ready to show those records if you ask or if a court asks.
Your agent cannot change your will, make decisions after you die, or do anything illegal. If your agent breaks these rules, you can revoke the power of attorney and take them to court for damages.
How to create a power of attorney
A power of attorney must be in writing. The exact form varies by state — some states have a standard form, and some allow you to write your own as long as it includes the required language. You sign it in front of a notary public (and sometimes in front of witnesses, depending on your state and the type of power of attorney).
You do not need a lawyer to create a power of attorney, though having one review it costs less than most people expect and can prevent mistakes. Online legal services and state bar associations often provide templates. Your bank may also have a form if the power of attorney is only for that account.
Once it is signed and notarized, give a copy to your agent and keep one for yourself. Some institutions — banks, brokerages, hospitals — may ask to see the original or a certified copy before they honor it. Keep the original in a safe place and tell your agent where it is.
When a power of attorney ends
A power of attorney ends automatically when you die. Your agent has no authority over your estate after that point — your will and the probate process take over instead.
You can revoke a power of attorney at any time by signing a written revocation and notifying your agent and any institutions that have a copy. You should also notify your agent in writing so there is no confusion.
A non-durable power of attorney ends if you lose the mental ability to make decisions. A durable power of attorney stays in effect. You can also set an end date in the document itself — for example, "this power of attorney expires on December 31, 2027."
Frequently Asked Questions
Can my agent use my money for themselves?
No. Your agent has a legal duty to use your money only for your benefit or for tasks you authorized. If they spend your money on themselves, you can revoke the power of attorney and take them to court. This is why it is critical to name someone you trust completely.
What happens if I become unable to make decisions and I do not have a power of attorney?
Your family may have to go to court and ask a judge to appoint a guardian or conservator to manage your affairs. This process is slower, more expensive, and gives a judge — not someone you chose — control over your decisions. A power of attorney avoids this.
Can I have more than one agent?
Yes. You can name two or more agents and decide whether they must act together or can act separately. Acting together means both must sign; acting separately means either one can act alone. Acting separately is faster but riskier if you do not fully trust both agents.
Does my agent need to be a lawyer?
No. Your agent can be anyone you trust — a family member, friend, accountant, or financial advisor. They do not need any special training or license. They do need to understand what you are asking them to do and be willing to keep careful records.
Can I change my power of attorney after I sign it?
Yes. You can revoke it entirely and create a new one, or you can create a new power of attorney that replaces the old one. Make sure to notify your agent and any institutions that have a copy of the old document so they know it is no longer valid.