Power of Attorney: Types, Cost, and When You Need One

A power of attorney (POA) is one of the most important legal documents most people have never thought about — until they desperately need it. It lets someone you trust make decisions on your behalf when you can't. Without one, a medical emergency or incapacity can force your family into an expensive, time-consuming court process just to manage your affairs.

What Is a Power of Attorney?

A power of attorney is a legal document that gives one person (the "agent" or "attorney-in-fact") the authority to act on behalf of another person (the "principal") in specified situations. The principal must be competent at the time they sign the POA.

The two key types are:

Financial Power of Attorney

A financial POA authorizes your agent to handle financial and legal matters on your behalf. Depending on how broad you make it, this can include:

• Managing bank accounts, paying bills, making deposits and withdrawals
• Buying or selling real estate on your behalf
• Managing investments and retirement accounts
• Filing tax returns
• Running a business
• Applying for government benefits

A durable financial POA remains in effect even if you become incapacitated. A non-durable POA automatically ends if you become incapacitated — which is the opposite of what most people need in an emergency situation. Make sure yours is durable.

Medical Power of Attorney (Healthcare Proxy)

A medical POA (sometimes called a healthcare proxy or healthcare POA) authorizes your agent to make medical decisions on your behalf if you're unable to communicate them yourself. This includes:

• Consenting to or refusing medical treatments
• Choosing hospitals and doctors
• Accessing your medical records
• Making end-of-life decisions (if specified)

What's the Difference Between a POA and a Living Will?

A living will (also called an advance directive) is a document where you specify your medical wishes — like whether you want life support in terminal situations. A medical POA designates a person to make those decisions when you can't. They work together and you should ideally have both.

When Do You Need a Power of Attorney?

Common situations where a POA is essential:

• Aging parents: If your parents become ill or incapacitated, you'll need POA to manage their finances and make medical decisions — without it, you may need to go to court for guardianship (expensive and slow)
• Surgery or medical procedure: If something goes wrong, who makes decisions for you?
• Military deployment: A servicemember deploying overseas often needs to give a spouse or family member financial POA to handle affairs at home
• Real estate transactions: If you're closing on a property but can't be present, a limited POA lets someone else sign on your behalf
• Living abroad: Managing US assets, taxes, or legal matters from overseas is much easier with a POA in place
• Planning ahead: Anyone over 18 should have both a financial and medical POA — emergencies don't give advance notice

What Happens Without a POA?

If you become incapacitated without a POA in place, your family may need to go to court and have a judge appoint a guardian or conservator to manage your affairs. This process:

• Typically costs $2,000–$5,000+ in attorney fees
• Takes months to complete
• Is public record
• May not result in the person you would have chosen being appointed

A POA costs $100–$400 and takes an hour. The comparison is stark.

How Much Does a POA Cost?

How to Make a Power of Attorney Valid

Requirements vary by state but typically include:

• The document must be in writing and signed by the principal
• The principal must be competent at the time of signing
• The signature must be notarized (required in most states)
• Some states also require witnesses (often 2, who cannot be the agent or beneficiaries)

Choosing Your Agent

Your agent has significant power. Choose someone who is:

• Trustworthy: They'll have access to your finances and/or medical decisions
• Available: They need to be reachable when needed — not traveling constantly
• Organized: Managing finances and coordinating medical care requires someone detail-oriented
• Willing: Have the conversation first — being an agent is a responsibility, not just an honor

You can name a backup agent in case your first choice can't serve. Many people name a spouse as primary and an adult child as backup.

Related Guides

• Wills & Estates — The other document everyone needs
• Lemon Law Handbook — All your rights in one place