What is a power of attorney in California?
A power of attorney is one of the most useful — and most misunderstood — documents in any plan for aging or incapacity. In simple terms, it lets one person give another the authority to act on their behalf: to pay bills, manage accounts, handle property, and make decisions when they cannot. In California it is governed by the Power of Attorney Law in the Probate Code, and the details — financial versus medical, durable versus springing, when it begins and when it ends — matter enormously. Here is what it is and how it works.
The two people in every power of attorney.
Every power of attorney involves two roles. The principal is the person granting the authority — the one whose money or care is at stake. The agent, also called the attorney-in-fact, is the person authorized to act for them. The word "attorney" here causes confusion: it does not mean a lawyer. It simply means someone empowered to act on another's behalf. The agent can be a spouse, an adult child, a trusted friend — or, when no such person fits, a neutral professional.
The authority can be as broad or as narrow as the document says. Some powers of attorney are written for a single transaction; the ones that matter for aging and incapacity are usually broad and ongoing, covering the full range of financial life.
Durable, springing, and why the timing matters.
The single most important word in this area is durable. A durable power of attorney stays in effect after the principal loses the capacity to manage their own affairs. That is almost always the entire point — a power of attorney that quietly ended the moment someone developed dementia would be useless exactly when it was needed. A power of attorney that is not durable terminates at incapacity.
There is also a choice about when the authority begins. An immediate power of attorney is effective as soon as it is signed — the agent can act right away. A springing power of attorney takes effect only when a stated event occurs, typically a physician's determination that the principal can no longer act for themselves. Springing powers sound safer, but they can create real-world delays — banks and institutions want clear proof the triggering event has happened before they will honor the document. Which design is right is a decision to make with the attorney who drafts it.
Money and medicine are two different documents.
This is the distinction families most often get wrong. In California, a financial power of attorney — the kind governed by the Probate Code — covers money and property: accounts, bills, real estate, taxes, benefits. It does not cover medical decisions. Authority over health care comes from a separate document, an Advance Health Care Directive (sometimes called a health-care power of attorney), which names a different agent to make medical choices and state end-of-life wishes.
A complete plan usually has both: one agent for finances, one for health care. They can be the same person or two different people. The key point is that signing one does nothing to grant the other — and discovering that gap in a crisis is exactly the situation good planning is meant to avoid.
When it ends — and what it does not cover.
A financial power of attorney ends when the principal revokes it, when its own terms run out, or when the principal dies. That last one surprises people: the authority that let an agent help during life stops at death. It does not extend to settling the estate. The day after someone dies, responsibility passes to the executor named in their will or the successor trustee of their living trust — a different legal authority entirely, created by different documents. An agent who keeps signing on a deceased principal's accounts is acting without authority.
There are limits during life, too. Because the agent is a fiduciary, the authority is bounded by duty: to act in the principal's interest and never the agent's own, to keep the principal's money separate, to keep records, and to avoid self-dealing. An agent cannot use the principal's assets for personal benefit and cannot do things the law reserves to the principal alone, such as making a will. Misusing a power of attorney is one of the most common forms of elder financial abuse, which is why how the agent is chosen matters as much as the document itself.
When a professional serves as agent.
Most powers of attorney name a family member, and most of the time that works. But not always — sometimes there is no adult child nearby, no one the principal fully trusts with their finances, or a family situation where naming one relative over another would cause conflict. Sometimes a principal simply prefers a neutral hand. In those cases a licensed professional fiduciary can be named as agent under a financial power of attorney.
A professional serving as agent carries the same fiduciary duties as any agent, with the added discipline of independent record-keeping, no personal stake in the principal's estate, and the experience to handle banks, benefits, and institutions that scrutinize a power of attorney. That neutrality and accountability are usually the whole reason a professional is chosen.
Where to go next.
Depending on what you are working through, here is where to read further:
To understand the agent role this practice can serve in — as agent under a financial power of attorney, and the related successor roles — see agent and successor-trustee services in California.
If you are deciding between a power of attorney and a conservatorship — that is, planning ahead while someone still has capacity versus going to court after they have lost it — see power of attorney vs. conservatorship in California.
A power of attorney is created by an estate planning attorney, not by this practice; what we do is serve in the agent role the document names. If you already have a power of attorney and need someone to act under it, that is a conversation worth having.
Common questions.
What is a power of attorney, in plain terms?
A power of attorney is a legal document in which one person — the principal — gives another person — the agent, or "attorney-in-fact" — authority to act on their behalf. In California it is governed by the Power of Attorney Law in the Probate Code. The authority can be broad or narrow, and it can cover financial matters, health-care decisions, or both, depending on how the document is written. The agent does not have to be a lawyer; the word "attorney" here just means someone authorized to act for another.
What is the difference between a durable and a springing power of attorney?
A durable power of attorney stays in effect even after the principal loses the mental capacity to manage their own affairs — which is the entire reason most people sign one, since that is exactly when it is needed. A power of attorney that is not durable ends the moment the principal becomes incapacitated. A springing power of attorney is one that does not take effect until a specific event happens, usually a doctor's determination that the principal can no longer act for themselves; an immediate power of attorney is effective as soon as it is signed. Each design has trade-offs worth understanding before choosing.
Does a financial power of attorney cover medical decisions?
No — and this trips people up constantly. In California, authority over money and property comes from a financial power of attorney, while authority over medical care comes from a separate document, an Advance Health Care Directive (sometimes called a health-care power of attorney). One does not include the other. A complete plan usually has both, naming an agent for finances and an agent for health care — who may or may not be the same person.
When does a power of attorney end?
A financial power of attorney ends when the principal revokes it, when its own terms expire, or — importantly — when the principal dies. It does not carry over into settling the estate. The moment someone dies, their agent's authority stops, and responsibility passes to the executor named in the will or the successor trustee of their trust. Families are often surprised by this: the power of attorney that let them help during life has no force the day after death.
What can an agent actually do — and what are the limits?
Within the authority the document grants, an agent can do things like pay bills, manage bank and investment accounts, deal with real estate, file taxes, and handle benefits and insurance. But the agent is a fiduciary: legally bound to act in the principal's interest, not their own, to keep the principal's money separate, to keep records, and to avoid self-dealing. An agent cannot use the principal's assets for personal benefit, cannot make a will for them, and cannot act beyond what the document allows. Misusing the authority is a serious matter and a common form of elder financial abuse.
Can a professional serve as agent under a power of attorney?
Yes. When there is no family member who is suitable, available, or trusted to handle the responsibility — or when the principal would simply rather appoint a neutral professional — a licensed professional fiduciary can be named as agent under a financial power of attorney. The professional carries the same fiduciary duties as any agent, with the added discipline of independent record-keeping and no personal stake in the outcome. That neutrality is often the point.
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