Yes, siblings can have a joint bank account, but the bank decides who can own it
Siblings can open a joint bank account together at most banks. However, the bank sets the rules about who can be on the account — not family law. Banks care about age, identity, and whether you can sign your name. They do not care whether you are related.
The main requirement is that all account owners must be at least 18 years old (or the age of majority in your state). Some banks allow younger people on accounts if a parent or guardian co-signs, but that makes it a different type of account. If both siblings are adults, you can walk into most banks together and open a joint account the same day.
The second requirement is that each person must provide a valid government ID — usually a driver's license or passport — and a Social Security number or tax ID. The bank will verify both before opening the account.
Key Takeaways
- Both siblings must be 18 or older and provide a government ID and Social Security number to open a joint account together.
- Each sibling has equal legal rights to all the money in the account, regardless of who deposited it or how much each person contributed.
- If one sibling dies, the money in the account usually passes to the surviving sibling automatically, unless the account is set up differently.
- Siblings should discuss and agree on how the account will be used before opening it, because either one can withdraw all the money without permission from the other.
- Some banks offer joint accounts with restrictions, such as requiring both signatures to withdraw large amounts, though this is less common.
What happens to the money if one sibling dies
Most joint bank accounts are set up as joint tenants with rights of survivorship. That phrase means: if one owner dies, the surviving owner automatically owns all the money. The bank transfers it without waiting for a will or court order.
This is different from a regular will. If you and your sibling have a joint account with survivorship rights, that money does not go through probate — the legal process that usually happens after someone dies. It passes directly to the surviving sibling, which is usually faster.
Some people set up joint accounts a different way, called tenants in common. With this setup, if one sibling dies, their share of the account goes to their estate and follows their will instead of automatically going to the surviving sibling. You can ask your bank which type of account you are opening, because the default varies by bank and by state.
What you need to know about access and control
On a standard joint account, both siblings have equal access to all the money. Either one can deposit money, withdraw money, or close the account without asking the other. This is true even if one sibling deposited all the money and the other deposited nothing.
This equal access is the biggest risk of a joint account between siblings. If you and your sibling disagree about how the money should be spent, either one can take it out. There is no legal way to stop them once the account is open. If you are worried about this, a joint account may not be the right choice.
Some banks offer joint accounts with dual signature requirements, meaning both owners must sign off on withdrawals above a certain amount. This is less common than standard joint accounts, and not all banks offer it. If this matters to you, call banks in your area and ask whether they have this option before opening an account.
Why siblings open joint accounts
Siblings often open joint accounts for specific purposes: to save money together for a shared goal, to manage household expenses if they live together, or to help an aging parent by pooling resources to pay their bills.
A joint account can also be simpler than other options. If you and your sibling want to share money without the legal complexity of a partnership or business structure, a joint account takes an hour to set up.
However, a joint account is not the same as a business account or a trust. If you are pooling money to run a business together, a business bank account is usually better because it separates personal money from business money and protects both of you legally. If you are managing money for a parent or relative, a trust or power of attorney may give you more control and protection than a joint account.
What to bring to the bank
Both siblings should go to the bank together. Bring:
- A valid government-issued photo ID for each person (driver's license, passport, or state ID card)
- Your Social Security number or Individual Taxpayer Identification Number (ITIN)
- Proof of your current address, such as a utility bill or lease (some banks ask for this, some do not)
- Initial deposit money, if the bank requires a minimum to open the account
Call the bank before you go and ask what they need. Different banks have slightly different requirements, and some may ask for additional documents if you have had fraud issues or do not have a credit history with them.
What happens if you want to close the account or remove someone
Either sibling can close a joint account without the other's permission. When you close it, the bank will ask what to do with the remaining money. Usually, you can split it between the two owners, or one person can take all of it if the other agrees.
You cannot remove one sibling from a joint account and keep it open — you have to close the account and open a new one. If one sibling wants out but the other wants to keep the account, the one who wants out can withdraw their share (or all of it, depending on how you split it), and the other sibling can open a new individual account.
If siblings disagree about closing the account or splitting the money, this can become a legal dispute. The bank will not take sides. If you reach this point, you may need to talk to a lawyer about your options.
Taxes and the IRS
A joint account between siblings does not create a tax problem by itself. However, the IRS cares about who earned the money and who owns it.
If one sibling deposits their paycheck into a joint account and the other sibling withdraws it, that does not change who earned the money or who owes taxes on it. The person who earned it still reports it as income.
If you are earning interest on the money in the account, the bank will send a 1099-INT form to whoever is listed as the primary account holder. That person should report the interest income on their tax return. If you and your sibling split the interest, you may need to file a separate form to show how you divided it. Talk to a tax professional if you are unsure.
Frequently Asked Questions
Can my sibling and I open a joint account if we live in different states?
Yes. You can open an account at a bank that operates in both states, or at a bank that allows online account opening. You may both need to go to a branch in person to verify your ID, or the bank may allow you to verify remotely using a video call. Call the bank and ask what they require.
What if one sibling is under 18?
You cannot open a standard joint account if one owner is under 18. However, some banks offer accounts where a parent or guardian co-signs for a minor. This is not a true joint account — the adult has legal control. Once the minor turns 18, you can convert it to a joint account or close it and open a new one.
Does a joint account affect my credit score?
A joint bank account itself does not show up on your credit report or affect your credit score. However, if the account is overdrawn or goes to collections, that can hurt both siblings' credit. Banks may also check your credit when you open the account.
Can I have a joint account with one sibling and a separate account with another sibling?
Yes. You can have multiple joint accounts at the same bank or different banks. Each account is separate, and you can set them up for different purposes.
What if my sibling and I want to split the money but we disagree on how?
The bank will not decide for you. If you cannot agree, either sibling can withdraw money or close the account, which can lead to a dispute. Before opening a joint account, discuss and write down how you plan to use the money and what happens if one of you wants out. If you reach a disagreement later, you may need legal help to resolve it.