Who can open an account and who cannot

You cannot open a bank account in your brother's name without him present, even if you are his legal guardian. Banks require the account holder to be there in person to sign documents and verify their identity. If your brother is a minor, the account will be a custodial account — one where you hold legal control until he reaches the age of majority (18 in most states, 21 in a few), but his name is on it and he is the actual owner.

If your brother is under 13, most banks will not let him open an account alone at all. You will need to be a parent or legal guardian and bring him to the bank together. If he is 13 or older, some banks allow minors to open accounts with a parent or guardian present, though the rules vary by bank and by state.

If you are not his parent or legal guardian — you are an older sibling but your parents are alive and have custody — you cannot open an account for him. Your parents would need to do it, or give you legal power of attorney to act on his behalf, which requires a court process.

Key Takeaways

  • Your brother must be present in person at the bank; you cannot open an account for him without him there, even as his guardian.
  • If he is under 13, you need to be his parent or legal guardian and bring him to the bank together to open a custodial account.
  • If he is 13 or older, some banks allow minors to open accounts with a parent or guardian present, but age rules differ by bank.
  • You will need his Social Security number, proof of his identity (birth certificate or state ID), and proof of your address to open a custodial account.
  • Custodial accounts transfer to your brother's full control at age 18 or 21, depending on your state, and you lose access at that point.

What documents you need to bring

Bring your brother's Social Security number or an Individual Taxpayer Identification Number (ITIN). If you do not have it, you can request it from the Social Security Administration before you go to the bank, though this adds time. Bring an original or certified copy of his birth certificate as proof of his identity and age. A state ID or passport works too if he has one.

Bring your own ID — a driver's license, passport, or state ID — and proof of your current address. Most banks accept a utility bill, lease, or mortgage statement dated within the last 60 days. Some banks also accept a recent bank statement or government mail.

Call the bank ahead of time and ask what they need for a minor custodial account. Requirements vary. Some banks have a minimum deposit to open an account; others do not. Some have monthly fees for minor accounts; others waive them. Knowing this before you arrive saves a trip back.

How a custodial account works

A custodial account is held in your brother's name, but you control it until he reaches the age of majority. You can deposit money, withdraw money, and manage the account on his behalf. Your brother can see the account and understand it is his, but he cannot make withdrawals or close it without your permission.

When your brother turns 18 (or 21 in some states), the account automatically transfers to his full control. You lose access. He can then withdraw all the money, close the account, or keep it open. This is called custodial transfer, and it happens by law — you do not have to do anything, but you also cannot stop it.

Money in a custodial account is considered your brother's asset for tax purposes. If the account earns interest or investment income above a certain threshold (which varies by year), your brother may owe taxes on it. Talk to a tax professional if the account will hold a large amount of money or be invested.

Different types of accounts for minors

A savings account is the simplest option. Your brother earns a small amount of interest, and you can deposit or withdraw money whenever you need to. Interest rates are low — usually under 1 percent — but there are no fees if you keep a low balance.

A checking account for minors lets your brother write checks or use a debit card, though many banks restrict this until he is older or require your approval. Some banks offer checking accounts for ages 13 and up; others wait until 16 or 18. A checking account usually has a monthly fee unless you meet a minimum balance.

A 529 education savings account is a tax-advantaged way to save for college or other education costs. Money grows tax-free if used for education. This is not a bank account — it is an investment account — but it is another option if your goal is to save for his future. You would open this through a brokerage or your state's 529 plan, not a bank.

What happens when your brother turns 18

On the date your brother reaches the age of majority in your state, the custodial account becomes his sole property. The bank will notify you both, and the account will transfer to his name alone. You will no longer have access, and you cannot see the balance or make transactions.

Your brother can then do whatever he wants with the money — spend it, move it to another bank, invest it, or leave it where it is. You have no say. If you are concerned about how he will handle a large sum, talk to him about it before the transfer happens, but understand that legally it becomes his choice.

Some parents and guardians use this as a teaching moment: they let their child know the account exists and how much is in it, and they discuss what he might want to do with it. Others keep it as a surprise. Either way, the transfer is automatic and final.

If your brother is already a teenager

If your brother is 13 or older, some banks will let him open a checking or savings account with you present as a parent or guardian, but he may be able to open one on his own at certain banks. Rules vary widely. Some banks allow teens to open accounts online or at an ATM with parental consent; others require an in-person visit.

If your brother wants his own account and you want him to have one, ask him what he wants to use it for. If it is just to save money you give him, a basic savings account is fine. If he wants to receive paychecks from a job or make purchases online, a checking account or debit card might be better. Some teen checking accounts come with parental controls so you can set spending limits or see transactions.

At 18, your brother can open any account he wants without you. But while he is a minor, involving him in the decision — even if you are the one opening it — teaches him how banking works and gives him a sense of ownership.

Frequently Asked Questions

Can I open a bank account for my brother if our parents are still alive?

No, not without permission from your parents or a legal document giving you guardianship. If your parents are alive and have custody, they are the ones who can open a custodial account. You can ask them to do it, or ask them to give you power of attorney, but that requires a court order and is usually only done in specific situations.

What if my brother is 18 or older?

He can open his own account without you. He will need his ID, Social Security number, and proof of address. You can go with him to help, but he is the one who signs the paperwork and owns the account. You have no legal access to it.

Can I put money into a custodial account after I open it?

Yes. You can deposit money whenever you want, and so can anyone else — grandparents, aunts, uncles, friends. Money deposited into a custodial account is still your brother's asset, and it will transfer to him at age 18 or 21. There is no limit on how much you can deposit, but large amounts may have tax implications.

What if I need to withdraw money from the custodial account for my brother's expenses?

You can withdraw money as the custodian, but it should be for your brother's benefit — school supplies, medical bills, activities, food. You cannot use it for your own expenses. If you do, you are technically misusing custodial funds, which can create legal and tax problems later.

Does opening a custodial account affect my brother's credit?

No. A savings or checking account does not build credit. Credit is built through loans, credit cards, and payment history. A custodial account is just a place to hold money. Your brother will start building credit when he is older and takes out a loan or gets a credit card in his own name.