A power of attorney cannot override a will. The two documents operate at different times: a power of attorney gives your agent authority only while you are alive, and your will takes effect only after you die. What an agent can do, though, is spend, sell, or redirect assets during your lifetime in ways that leave your will with far less to distribute. The will’s words stay the same; the property it names may not.
Why a POA and a Will Never Operate at the Same Time
A power of attorney authorizes someone you choose, called your agent, to handle financial or medical decisions for you while you are living. The moment you die, that authority ends. Your agent has no power over your estate, no right to touch your bank accounts, and no legal standing to direct what happens to your property after death.
A will works in the opposite direction. It sits dormant your entire life and activates only at death. Before it can be carried out, a probate court has to validate it, confirm it meets your state’s signing and witnessing rules, and formally appoint the executor you named. There is a real gap between the end of the agent’s authority and the start of the executor’s, and during that gap the estate essentially sits frozen.
For a POA to remain in force if you lose mental capacity, it must include “durable” language. A standard POA is suspended the moment you can no longer make your own decisions, which is precisely when an agent is needed most. Most people creating a POA for long-term planning want the durable version.
What an Agent Can Never Do to Your Will
No matter how broadly a power of attorney is written, an agent cannot create, change, or revoke the principal’s will. Making a will is treated as an inherently personal act that cannot be delegated. The Uniform Power of Attorney Act does not even list will-making as something requiring special authorization, because the possibility does not exist under the law. If an agent tried to alter a will, the change would have no legal effect.1eSIGN. Uniform Power of Attorney Act Final Version 2006
An agent also cannot engage in self-dealing unless the POA document explicitly permits it. Self-dealing means using the principal’s money or property for the agent’s own benefit: transferring the principal’s bank balance to the agent’s own account, buying the principal’s property at a below-market price, or funneling investments into the agent’s business. Even when a POA authorizes self-dealing, the agent must still act in the principal’s best interest, and courts scrutinize these transactions closely.
Violating these limits carries real consequences. An agent who misuses authority can face civil suits to recover what was taken, court orders removing them as agent, and criminal prosecution for fraud, theft, or elder abuse depending on the facts.
How an Agent’s Lawful Actions Can Still Shrink Your Inheritance
Even a perfectly honest agent can undercut a will without breaking any rules. Suppose your will leaves the family home to your daughter and a brokerage account to your son. If your agent sells the house to pay for your nursing care or liquidates the brokerage account to cover medical bills, those specific gifts disappear. The will does not change; the assets it describes are simply gone.
The legal term for this is ademption. When property specifically named in a will no longer belongs to the person who died, the gift fails. Under the traditional rule followed in many states, the beneficiary receives neither the property nor its cash equivalent. The gift is extinguished.2Legal Information Institute. Ademption by Extinction
An agent who sells your house to fund your care is doing exactly what an agent is supposed to do. But the outcome can blindside family members who expected a specific inheritance and only later learn the asset was spent years before the will was read.
When Beneficiaries May Still Recover the Value
The traditional ademption rule produces harsh results when an agent, rather than the principal, made the decision to sell. A growing number of states have adopted a softer approach based on the Uniform Probate Code. Under that approach, when a conservator or an agent acting under a durable power of attorney sells specifically devised property for an incapacitated principal, the named beneficiary has a right to receive the net sale price as a cash equivalent from the estate.3ACTEC Foundation. The Problem of Replacement Property in the Law of Ademption
Whether your state follows the all-or-nothing traditional rule or the modern approach matters a great deal when an agent has been managing and selling assets on an incapacitated principal’s behalf. This is one area where checking your state’s specific law pays off.
Actions That Require Express Authorization in the POA
Some agent actions carry so much potential to reshape an estate that the Uniform Power of Attorney Act, adopted by a majority of states, requires the principal to specifically and expressly grant the authority in the POA document. General language granting broad financial powers is not enough.1eSIGN. Uniform Power of Attorney Act Final Version 2006
Actions requiring express authorization include:
- Making gifts of the principal’s property
- Creating or changing beneficiary designations on life insurance policies, retirement accounts, or transfer-on-death accounts
- Creating or changing rights of survivorship on jointly held property
- Creating, amending, or revoking a trust
- Delegating authority granted under the POA to someone else
Every one of these can reshape what your will distributes. Changing a beneficiary on a retirement account, for example, can redirect hundreds of thousands of dollars outside of probate entirely, because beneficiary-designated assets pass directly to the named person and never become part of the estate the will controls. That is why the law treats these actions as different in kind from paying bills or managing investments.
Limits on Gifting the Principal’s Property
Even when a POA expressly authorizes gifting, the agent does not have a blank check. Under the Uniform Power of Attorney Act’s default rules, an agent with general gifting authority can give away the principal’s property only up to the federal gift tax annual exclusion per recipient. For 2026, that limit is $19,000 per person.4Internal Revenue Service. Whats New Estate and Gift Tax
The agent must also decide that each gift is consistent with what the principal would actually want, based on the principal’s known wishes or, if those are not known, the principal’s best interest. Relevant considerations include the size of the estate, the principal’s anticipated living expenses, tax implications, and the principal’s history of gift-giving. An agent who makes large gifts that drain the estate and undercut the will’s distributions is exposed to legal challenge.
A principal can grant broader gifting authority by explicitly authorizing gifts above the annual exclusion. The tradeoff is direct: a narrowly drafted POA protects the estate but may leave the agent short on flexibility, while a broadly drafted one provides flexibility and increases risk.
The Agent’s Duty to Preserve Your Estate Plan
The agent’s obligations go beyond simply avoiding theft. Under the Uniform Power of Attorney Act, an agent who accepts the role must act loyally and in the principal’s best interest, keep the principal’s property separate from their own, maintain reasonable records of every transaction, and act only within the scope of authority the POA actually grants.
One duty connects directly to wills. The agent must attempt to preserve the principal’s estate plan to the extent the agent knows what it is and doing so remains consistent with the principal’s current needs. An agent who knows the will leaves a specific house to a specific person should explore alternatives before selling that house: tapping other assets first, or looking into less expensive care. The duty is not absolute, because the principal’s immediate welfare comes first, but it creates a legal expectation that the agent at least considers the effect on the estate plan.
This is why communication matters. An agent who has never seen the will cannot preserve an estate plan they do not know about. If you are naming someone under a durable POA, sharing at least the general outline of your will with that person makes it more likely your wishes survive intact.
How to Challenge an Agent Who Oversteps
If you suspect an agent is mismanaging finances or acting against the principal’s interests, the Uniform Power of Attorney Act allows a broad range of people to petition a court for review. The principal, the agent themselves, close family members, anyone named as a beneficiary in the principal’s will or trust, a guardian or conservator, government agencies with authority to protect vulnerable adults, and other people with a sufficient interest in the principal’s welfare can all bring a petition.
A reviewing court can order a full accounting of every transaction, restrict or revoke the agent’s authority, order the return of misappropriated property, or appoint a different agent. The accounting request is often the most revealing step. An agent acting properly should have no trouble producing records. One who resists or cannot explain where the money went is telling you something.
Timing matters. Challenging an agent’s actions while the principal is still alive is far more effective than trying to unwind transactions after death. Once the principal dies, the POA terminates, and any dispute shifts to probate court. Proving that an agent breached a fiduciary duty years earlier, with the agent no longer in a formal role and the principal unable to testify, is substantially harder.
Keeping Your POA and Will Aligned
The best protection is to treat the two documents as parts of a single plan rather than separate paperwork.
- Choose an agent who understands your values, knows your family, and can handle financial responsibility. This matters more than most legal safeguards you can write into the document.
- Limit authority where appropriate. If you do not want your agent making gifts or changing beneficiary designations, leave that language out. Default rules in most states already restrict these actions without express authorization.
- Consider co-agents or outside oversight. Two agents who must act together, or a third party who receives copies of financial records, build in accountability without requiring court involvement.
- Share your estate plan with your agent. The fiduciary duty to preserve the plan only works if the agent knows what the plan is.
- Use beneficiary designations strategically. Retirement accounts, life insurance, and transfer-on-death accounts pass outside your will. Making sure those designations line up with your will reduces the damage if estate assets get depleted during your lifetime.
- Review both documents periodically. Marriage, divorce, new children, or a significant purchase can create mismatches between your POA, your will, and your beneficiary designations. A joint review every few years catches conflicts before they matter.
If you are still legally competent and want to end an agent’s authority, you can revoke the POA in writing, have the revocation notarized, and send copies to every bank, brokerage, and institution that received the original. Certified mail with return receipt creates proof that the institution was on notice and can no longer accept the former agent’s instructions.