Porter Mountain Advisors, CPA and attorney in Mesa, AZ
Estate Planning August 31, 2026 · 3 min read

What Is a Power of Attorney, and Why Every Adult Needs One

The document that decides who speaks for you — financially and medically — if you can't.

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Short answer

A power of attorney is a legal document that lets someone you trust make decisions for you if you can’t make them yourself. Every adult — not just retirees — should have one, because an accident or illness can happen at any age. Here’s what it does and the types you need.

What a power of attorney actually does

It names an “agent” to act on your behalf if you’re incapacitated. Without one, your family may have to go to court to get guardianship or conservatorship just to pay your bills or make a medical decision — a slow, expensive, public process you can avoid with a simple document.

The types every Arizona adult should have

  • Financial (or “durable”) power of attorney — lets your agent manage money, bills, accounts, and property if you can’t.
  • Healthcare power of attorney — lets your agent make medical decisions when you’re unable to.
  • Living will (advance directive) — states your wishes for end-of-life care, so your family isn’t left guessing.

“But I’m young and healthy — do I really need one?”

Yes. Powers of attorney aren’t about age; they’re about the unexpected. A car accident or sudden illness at 30 creates the same problem as one at 70. This is one of the simplest, lowest-cost pieces of an estate plan — and one of the most important.

What happens without one

If you’re incapacitated with no power of attorney in place, no one automatically has the authority to step in — not even your spouse, for everything. Your family would likely have to petition a court, which takes time and money at the worst possible moment.

How we help

We draft financial and healthcare powers of attorney (often alongside a will or trust) so someone you trust can act the instant they need to. A will and power of attorney start at $1,200.

Key takeaways

  • A power of attorney lets a trusted person act for you if you can’t.
  • Every adult needs a financial POA, a healthcare POA, and a living will.
  • Without them, your family may face a court process just to help you.

Give your family the authority to help you when it counts. Request a free consultation. See also Estate Planning.

This article is for educational purposes only and is not legal or tax advice. Every situation is different — talk to a professional about yours. Read the full disclaimer.

Good to know

Questions on this topic

What is a power of attorney?

A power of attorney is a legal document that lets someone you trust make decisions for you if you can’t make them yourself. It names an “agent” to act on your behalf if you’re incapacitated.

Do young adults need a power of attorney?

Yes. Powers of attorney aren’t about age; they’re about the unexpected. A car accident or sudden illness at 30 creates the same problem as one at 70. This is one of the simplest, lowest-cost pieces of an estate plan — and one of the most important.

What happens without a power of attorney?

If you’re incapacitated with no power of attorney in place, no one automatically has the authority to step in — not even your spouse, for everything. Your family would likely have to petition a court, which takes time and money at the worst possible moment.

See all FAQs

Luke Tingey, Attorney & CPA at Porter Mountain Advisors in Mesa, AZ
Written by

Luke Tingey, Attorney & CPA

Luke holds both a CPA license and a law license, and advises Arizona and New Mexico families on the tax and legal sides of the same plan. Meet the team.

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