Estate Planning guide

Why Every Adult Over 18 Needs a Power of Attorney

The two least expensive documents in an estate plan, and often the first ones a family needs. Why they matter from age 18.

Written by
Portrait of Claire Hollis
Claire HollisPartner
Category
Estate Planning
Updated
Jun 18, 2026
Reading time
6 min read
Estate Planning guide illustration
Illustrative photo. Estate Planning guidance from Claire Hollis.
The short answer

Once a child turns 18, parents lose automatic authority to see medical records or manage accounts. A financial power of attorney and a health care power of attorney let a trusted person act if an adult cannot, without going to court.

What changes on an 18th birthday?

What parents can still do

  • Help with tuition and bills by agreement
  • Stay on as a joint account holder if added
  • Be named as agent in a power of attorney
  • Keep emergency contact status

What parents can no longer do

  • See medical records without a release
  • Talk to doctors about treatment
  • Manage the adult child's accounts
  • Sign leases or forms on their behalf

Which documents close that gap?

  • Financial power of attorney

    Lets an agent pay bills, talk to banks and handle benefits and taxes.

  • Health care power of attorney

    Lets an agent make medical decisions when you cannot.

  • HIPAA release

    Lets doctors share information with the people you name.

  • Living will

    States your wishes about life-sustaining treatment.

What happens without them?

A college student in a crash or an adult with a sudden illness may not be able to sign anything. Without documents, family members may need a guardianship: a court case that is slow, public and supervised by a judge long after the emergency passes.

  • 2witnesses or a notary for an Ohio health care power of attorney
  • 18the age when parental authority ends
  • 1 meetingwhat a basic set usually takes

General information about Ohio law. Planning figures, not case results.

How do you set them up?

  1. 01

    Choose an agent and a backup

    Someone organized, nearby if possible, and willing to serve.

  2. 02

    Decide when authority begins

    Right away, or only if a doctor confirms incapacity.

  3. 03

    Sign with the right formalities

    Witnesses or a notary, depending on the document.

  4. 04

    Share copies

    With the agent, your doctor and anyone who will need to see them.

Young adult package

Financial and health care powers of attorney, living will, HIPAA release

from $350

Add to a family plan

When parents sign their own plan the same day

from $200

Illustrative demo figures, confirmed in a written engagement letter.

Questions readers ask

Yes. You can revoke it in writing while you have capacity, and you should tell the agent and anyone relying on it.

No, but a nearby agent can be more practical in an emergency.

It covers one account. It does nothing for medical decisions, benefits or other accounts.

Yes. Every adult should have both, and they are often the first documents a family uses.

Portrait of Claire Hollis
About the author

Claire Hollis, Partner. Claire leads the estate planning and probate group. Clients describe her meetings as calm, organized and free of jargon.

Read Claire's profile

This article is general information about Ohio law, not legal advice, and reading it does not create an attorney-client relationship.

Questions about your own situation? Talk with our estate planning group

Free consultation
CallFree consultation