A power of attorney does not override a joint account owner's rights
A power of attorney gives one person legal authority to act on behalf of another, but it does not erase the rights of a joint account owner. If two people own a bank account together, both owners have equal access and control — a power of attorney held by one person cannot take that away from the other owner.
The key difference is this: a power of attorney is a relationship between the person granting it (the principal) and the person receiving it (the agent). A joint bank account is a relationship between two account owners and the bank. The power of attorney does not change what the bank sees — it still sees two owners with equal rights.
This matters because it creates a real limit on what an agent can do. An agent with power of attorney over someone's finances can withdraw money from that person's individual accounts, pay their bills, and manage their property. But if the account is jointly owned, the other owner can still access it, still withdraw from it, and still see all transactions. The agent cannot lock the other owner out.
Key Takeaways
- A power of attorney does not override a joint account owner's legal rights to access and withdraw money.
- Both joint owners retain equal control of the account regardless of any power of attorney arrangement.
- The bank recognizes two owners, not an agent and a principal, so the power of attorney does not change account permissions.
- If you want to prevent someone from accessing a joint account, you must remove them as an owner through the bank, not through a power of attorney.
- An agent with power of attorney can withdraw from a joint account, but so can the other owner at any time.
Why the bank treats joint accounts differently from accounts with power of attorney
Banks distinguish between ownership and authority. A joint account owner has ownership — the account is legally theirs. An agent with power of attorney has authority — the right to act on someone else's behalf, but not ownership of their money.
When you open a joint account, the bank records both names as owners. Both owners sign the signature card. Both owners can walk into the branch and withdraw money without permission from the other. The bank's system does not require one owner to approve the other owner's transactions.
A power of attorney is different. It is a document that says "Person A has authorized Person B to handle their financial matters." The bank sees it as a legal permission slip, not as a change to who owns the account. The agent can act, but the principal still owns the money.
This is why a power of attorney alone cannot prevent a joint owner from accessing an account. The bank's records still show two owners. Removing someone from a joint account requires going to the bank and changing the account registration — it requires paperwork that removes their name.
What an agent with power of attorney can actually do with a joint account
An agent holding power of attorney over someone can withdraw money from that person's joint account. The agent's authority extends to the principal's share of the account. This is true even if the other joint owner objects.
However, the agent cannot prevent the other owner from doing the same thing. If the principal and another person own a joint account together, and the principal grants power of attorney to a third person, that third person can withdraw money — but the second owner can also withdraw money at any time. There is no hierarchy. There is no "the agent goes first" or "the agent has final say."
This creates a practical problem in some situations. Imagine an adult child holds power of attorney over an aging parent's finances because the parent is no longer able to manage money. The parent and a spouse own a joint account. The adult child can withdraw from that account to pay the parent's medical bills. But the spouse can also withdraw from the same account for their own purposes. The adult child has no way to stop them.
When joint account ownership causes problems with power of attorney
Joint accounts often create confusion when someone needs a power of attorney. Many people add a family member to their bank account as a joint owner thinking it will make it easier for that person to help them later. But this can backfire.
If you add someone as a joint owner, they own half the money immediately. If you later become incapacitated and need someone to manage your finances, a power of attorney will not give that person more control than the joint owner already has. And if the joint owner is not the person you want handling your money, you have a problem — you cannot use a power of attorney to override them.
This is why elder law attorneys often recommend against joint accounts. Instead, they suggest naming someone as a power of attorney agent while keeping accounts in your name alone. That way, the agent has the authority you want them to have, but they do not own the money outright. You retain more control over what happens.
Joint accounts also create tax and Medicaid complications that a power of attorney does not. If you own an account jointly with someone, half of it may be considered their asset for purposes of Medicaid planning or estate taxes. A power of attorney does not create these same issues.
How to remove someone from a joint account if you need to
If you have a joint account and you want to prevent the other owner from accessing it, you must change the account registration. A power of attorney will not do this. You need to contact the bank directly.
Go to the bank with a photo ID and ask to speak with an account manager. Tell them you want to remove the other person as a joint owner. The bank will have you sign new paperwork. The other person's name will come off the account. After that, only you can access it.
Some banks require both owners to be present to remove someone. Others allow one owner to remove the other unilaterally — it depends on the bank and the state. Call your bank's customer service line and ask what their policy is before you go in.
If the other owner refuses to cooperate and the bank requires both signatures, you may need to close the account and open a new one in your name alone. You can then transfer your money to the new account. The other owner cannot stop you from doing this with your own money.
What to do if you are concerned about a joint account and power of attorney
If you are the principal (the person granting power of attorney) and you have a joint account, think carefully about who you want as your agent. Your agent will be able to access the joint account, but so will the other owner. Make sure you trust both people.
If you are the agent (the person receiving power of attorney) and the principal has a joint account with someone else, understand that you do not have exclusive control. The other owner can access the account and withdraw money whenever they want. If you are managing the principal's finances, you may want to suggest they move money to an account in their name alone, with you as the agent.
If you are the other joint owner and someone else holds power of attorney over your co-owner, your rights do not change. You can still access the account and withdraw money. But be aware that the agent may also be withdrawing money for the principal's expenses. Keep an eye on the account balance and the transaction history.
State laws and variations in how joint accounts work
Most states treat joint accounts the same way — both owners have equal rights, and a power of attorney does not override that. However, some states have specific rules about what happens to a joint account if one owner becomes incapacitated.
A few states have convenience accounts, which are accounts where one person is the owner and another person is listed for convenience only. The person listed for convenience does not actually own the money — they just have access to help the owner. These are different from true joint accounts, and a power of attorney works differently with them. If you are unsure whether your account is a joint account or a convenience account, call the bank and ask.
Some states also have rules about what happens to a joint account after one owner dies. In most states, the surviving owner gets the entire account. In a few states, the account goes through probate. This does not affect how a power of attorney works during the owner's lifetime, but it is worth knowing.
Frequently Asked Questions
Can I use power of attorney to prevent my spouse from accessing our joint account?
No. A power of attorney does not change ownership rights. Your spouse is a joint owner and can access the account regardless of any power of attorney. To prevent access, you would need to remove them as an owner through the bank, which typically requires both signatures or a court order.
If I have power of attorney over my parent's finances, can I withdraw from their joint account with my sibling?
Yes, you can withdraw from the account because you have authority over your parent's finances. But your sibling can also withdraw at any time because they are a joint owner. You cannot stop them or require their permission.
Does power of attorney let me add myself to someone else's joint account?
No. A power of attorney gives you authority to act on someone's behalf, but it does not give you the right to change account ownership or add yourself as an owner. You can withdraw money and manage the account, but you cannot become a joint owner without the bank's approval and the account holder's consent.
What happens to a joint account if the person with power of attorney dies?
The power of attorney ends when the agent dies. The joint account continues to exist with both owners' names on it. The surviving joint owner retains full access and control. The agent's death does not change the account in any way.
Should I add someone to my bank account as a joint owner instead of giving them power of attorney?
That depends on your situation. A joint owner has immediate access and owns the money outright. An agent with power of attorney has authority but not ownership. Joint accounts are simpler for day-to-day help but create complications with taxes, Medicaid, and estates. Power of attorney gives you more control but requires the agent to act on your behalf rather than in their own right.