Short answer: These are three different legal tools for letting one person make decisions for an adult who cannot fully manage their own affairs. A power of attorney (POA) is a private document an adult signs voluntarily, in advance, with no court involved. A guardianship and a conservatorship are court orders a judge imposes when an adult can no longer decide for themselves—typically a guardian handles personal and medical decisions (where someone lives, their care, their health), while a conservator handles money and property (bills, bank accounts, investments). If the person still has the mental capacity to choose, a power of attorney is almost always faster, cheaper, and less intrusive than going to court.
One important warning before you read on: the exact words mean different things in different states. In many states "guardian" = person and "conservator" = finances, the split described above. But some states call the financial role a "guardian of the estate," and at least one state (California) uses "conservatorship" for an adult's person and/or estate and reserves "guardianship" for minors. Because this is governed by state law, not a single federal rule, always check the terms your state actually uses. Our per-state pages cover the local labels and forms.
The core difference: person vs. money, and court vs. no court
Two questions sort out which tool you are dealing with:
- Is it about the person or the money? Personal and health decisions usually fall under guardianship (sometimes called "guardianship of the person"). Financial and property decisions usually fall under conservatorship (sometimes "guardianship of the estate" or "conservatorship of the estate").
- Did the adult choose this in advance, or did a judge order it? If the adult signed papers while they still understood what they were doing, that is a power of attorney (and sometimes a health care proxy / advance directive). If a court had to step in because the adult can no longer decide, that is guardianship or conservatorship.
Power of attorney (POA): chosen in advance, no court
A power of attorney is a document in which a competent adult (the "principal") names someone they trust (the "agent" or "attorney-in-fact") to act for them. The principal must have mental capacity at the moment they sign—which is exactly why families are urged to set one up before a crisis.
- Financial / durable POA: lets the agent handle money, bills, property, and accounts. "Durable" means it stays valid if the principal later becomes incapacitated—the feature that makes it useful for aging or illness.
- Medical POA / health care proxy: lets the agent make medical decisions if the principal cannot speak for themselves.
- Springing vs. immediate: some POAs take effect right away; a "springing" POA takes effect only when a defined event (often a doctor's finding of incapacity) occurs.
Why people prefer it: a POA is private, usually inexpensive, and avoids court entirely. The principal stays in control of who is chosen and what powers are granted, and can revoke it anytime while still competent.
Its limits: a POA only works if the adult still has capacity to sign it. Once someone has lost capacity without a POA in place, it is generally too late—the family is left with the court route. A POA also does not, by itself, strip the principal of their own rights; the principal can still act and can override or revoke the agent while competent. Banks and other institutions sometimes resist older or non-standard POA forms, so using current statutory forms helps.
Guardianship: a court protects the person
When an adult can no longer make safe personal decisions and has no valid POA or health care proxy, someone can petition a court to appoint a guardian. After notice and a hearing—usually requiring medical evidence of incapacity—a judge decides whether the person is legally incapacitated and, if so, appoints a guardian to make personal decisions: living arrangements, medical care, daily welfare.
Because a guardianship removes rights from an adult, courts are supposed to order only what is necessary. Many states now favor limited guardianship (the guardian gets authority only over the specific areas the person cannot handle) and require the court to consider less-restrictive alternatives—such as a POA, supported decision-making, or a representative payee—before imposing a full guardianship.
Conservatorship: a court protects the money
A conservatorship (in many states) is the financial counterpart: a court appoints a conservator to manage the protected person's income, assets, and property—paying bills, managing accounts, and protecting them from financial exploitation. The conservator typically owes ongoing duties to the court, including filing an inventory of assets and periodic accountings showing how the money was handled.
The same person can sometimes serve as both guardian and conservator, or the court can split the roles between two people. Again, the labels vary: what one state calls a "conservator" another calls "guardian of the estate." Focus on the function—who controls the money—rather than the word.
Side-by-side comparison
- Who decides who is in charge? POA: the adult chooses. Guardianship/conservatorship: a judge chooses (often following the person's prior preferences when known).
- When is it set up? POA: in advance, while competent. Guardianship/conservatorship: usually after capacity is already lost.
- Court involved? POA: no. Guardianship/conservatorship: yes, including ongoing oversight.
- What it covers: Guardianship → the person (health, care, residence). Conservatorship → the money and property. A POA can cover either or both, depending on how it is written.
- Cost and speed: POA is typically a one-time, lower-cost document. Guardianship/conservatorship involves filing fees, possible attorney and evaluator costs, a hearing, and continuing reports.
- Rights of the adult: POA leaves the principal's legal rights intact. A guardianship/conservatorship can remove significant rights and is harder to undo.
So which one do you actually need?
- The person still understands their choices: a power of attorney (financial and/or medical) is usually the right, lower-cost answer. Set it up now—capacity can be lost suddenly.
- The person has already lost capacity and signed nothing: you are likely looking at guardianship (for personal/medical decisions) and/or conservatorship (for finances) through the court.
- You only need to manage a single benefit check: a narrower fix such as a Social Security representative payee may be enough—ask before filing a full court case.
What you can do
- Act early if there is still capacity. If your loved one can still understand and choose, prioritize a durable financial POA and a medical POA/health care directive. This is the single best way to avoid court later.
- Gather the facts. Note the specific decisions that are going wrong (missed bills, unsafe living conditions, medical neglect) and collect recent medical information about the person's capacity. Courts and lawyers will ask for concrete examples.
- Check your state's exact terms. Confirm whether your state splits "guardian" (person) and "conservator" (money), or uses different labels. See our per-state guide for the right words, forms, and filing court.
- Ask about the least-restrictive option first. Before a full guardianship, ask whether a limited guardianship, supported decision-making, representative payee, or a POA would solve the problem.
- Talk to an elder-law or estate-planning attorney. Because these rules are state-specific and the stakes (someone's rights and money) are high, a short consultation with a local elder-law attorney is well worth it—especially before filing a court petition or signing complex documents.
Time-sensitive points to watch
- Capacity is a deadline. A POA can only be signed while the person still understands it. Waiting can permanently close off the cheaper, private option and force a court case.
- Court cases take time. Guardianship and conservatorship petitions involve notice periods and a hearing; if there is an urgent risk, ask the court about emergency or temporary appointment procedures.
- Conservators face filing deadlines. If appointed, you will usually owe the court an initial inventory and regular accountings—missing them can create personal liability, so calendar them.
This article is general information, not legal advice; guardianship, conservatorship, and power-of-attorney rules vary by state, so consult a licensed attorney in your state about your situation.
This article is general legal information, not legal advice, and may not reflect the most current law or the law in your jurisdiction. Laws vary by state and change over time. For advice about your specific situation, consult a licensed attorney.