Yes, but the rules depend on her age and your relationship to her

You can open a account for your niece, but what you can actually do with it depends on whether she is a minor or an adult, and whether you have legal guardianship. If she is under 18 and you are not her legal guardian, you can open a custodial account in her name with yourself as the custodian — the bank holds the money in trust for her, and you manage it until she reaches the age of majority (usually 18 or 21, depending on your state). If you are her legal guardian, you can open a standard minor account. If she is an adult, she must open the account herself, though you can help her do it.

The key difference is control: a custodial account is legally hers from day one, even though you manage it. You cannot use the money for yourself, and when she reaches adulthood, the account becomes hers to control. A guardianship account gives you broader authority, but only if you have court-ordered guardianship. If you straightforward want to set money aside for her without legal paperwork, a custodial account is the standard route.

Key Takeaways

  • A custodial account lets you open and manage a bank account for your niece without legal guardianship, and the money belongs to her from the start.
  • You will need her Social Security number, proof of her identity (usually a birth certificate), and proof of your own identity and address to open the account.
  • When your niece reaches the age of majority in your state (usually 18 or 21), the account becomes hers to control and you lose management rights.
  • Custodial accounts are reported on your niece's tax return, not yours, so any interest or earnings she makes may affect her tax situation.
  • Some banks have minimum balance requirements or monthly fees for custodial accounts, so compare options before opening.

Custodial accounts: how they work and what you can do with them

A custodial account is a bank account opened in your niece's name with you named as the custodian. You have the legal right to deposit money, withdraw money, and manage the account on her behalf. The money in the account is her property — not yours — even though you control it. This is the most common way a relative without guardianship can set money aside for a child.

You can deposit money into the account whenever you want. You can withdraw money to pay for her expenses — school supplies, medical bills, sports fees, clothing — as long as the money is spent for her benefit. You cannot withdraw money to pay your own bills or use it for yourself. When she reaches the age of majority in your state (usually 18, sometimes 21), the account automatically becomes hers to control, and you lose the right to manage it. At that point, she can withdraw the money, close the account, or leave it open.

Most banks offer custodial accounts under the Uniform Transfers to Minors Act (UTMA) or the Uniform Gifts to Minors Act (UGMA). These are state laws that standardize how custodial accounts work. The specific rules vary slightly by state — for example, the age at which your niece takes control of the account — so ask your bank which law applies in your state.

What documents and information you will need

To open a custodial account, bring or provide the following to your bank:

  • Your niece's full legal name and date of birth
  • Her Social Security number (or Individual Taxpayer Identification Number if she does not have a Social Security number)
  • Proof of her identity, usually her birth certificate or passport
  • Your full legal name, date of birth, and address
  • Proof of your identity, such as a driver's license or passport
  • Proof of your address, such as a recent utility bill or bank statement

Some banks may ask for additional information, such as your relationship to your niece or your employment status. If you do not have a birth certificate, some banks will accept a hospital birth record or a certified copy from the vital records office in the state where she was born. If your niece does not have a Social Security number, you can request one from the Social Security Administration before opening the account, or some banks will help you explore during the account opening process.

Tax reporting and how custodial accounts affect your niece

Any interest, dividends, or earnings in a custodial account are reported on your niece's tax return, not yours. This means that if the account earns $50 in interest in a year, that income belongs to her and may need to be reported when taxes are filed. The first $1,250 of unearned income (interest, dividends) is usually not taxable for a dependent child, but amounts above that are taxed at her rate or your rate, depending on her age and total income. Ask your bank for a 1099-INT form at tax time if the account earned interest.

A custodial account also counts as her asset if she ever applies for financial aid for college. Schools consider custodial accounts when calculating how much aid a student should receive, so having money in her name may reduce the aid she qualifies for. This is different from money in your own account, which does not count against her aid. If college financial aid is a concern, talk to a tax professional or financial aid advisor before opening the account.

If you have legal guardianship instead

If you are your niece's legal guardian — meaning a court has granted you guardianship — you can open a standard minor account or a guardianship account instead of a custodial account. A guardianship account gives you broader authority to manage her money and may have different rules about when she takes control of the account. The specific rules depend on your state's guardianship laws and the court order that granted you guardianship.

If you have guardianship, bring your guardianship papers (the court order) to the bank along with the same identity documents listed above. The bank will need to see proof that you have legal authority to manage her finances. Ask the bank whether they prefer a guardianship account or a custodial account, since some banks have different products for each situation.

If your niece is an adult

If your niece is 18 or older, she must open the account herself. You cannot open an account in her name without her consent and signature. You can help her by going to the bank with her, explaining the process, or helping her gather documents, but she has to be the one to sign the paperwork and provide her own information.

Once the account is open, you can be added as an authorized user or joint owner if she agrees, but that is her decision to make. As an authorized user, you can make deposits and withdrawals on her behalf. As a joint owner, you both have equal rights to the account and its contents. Neither of these arrangements requires guardianship or custodial paperwork.

Common fees and account minimums to watch for

Some banks charge monthly maintenance fees for custodial accounts, while others waive fees if you maintain a minimum balance or set up direct deposit. Fees typically range from $5 to $15 per month, though some banks offer no-fee options. A few banks require a minimum opening deposit (often $25 to $100) or a minimum balance to avoid fees. Before opening an account, ask the bank about all fees and minimums so you understand the full cost of maintaining the account.

Online banks and credit unions often have lower fees or no fees for custodial accounts compared to large national banks. If the bank you use does not offer custodial accounts or charges high fees, it is worth checking with other banks in your area or online options. The money you save on fees stays in the account for your niece.

Frequently Asked Questions

Can I open a custodial account if I am not her parent?

Yes. You do not need to be her parent to open a custodial account. Any adult can be a custodian — grandparents, aunts, uncles, and family friends all open custodial accounts. You do need to be at least 18 and have a valid ID and Social Security number.

What happens to the money when my niece turns 18?

The account becomes hers to control. You lose the right to manage it or withdraw money. She can leave the money in the account, withdraw it, or close it. Some states allow the account to stay open until age 21, but the rules vary. Ask your bank what age applies in your state.

Can I use the money in the custodial account to pay for her school or medical bills?

Yes. You can withdraw money from the account to pay for expenses that benefit her, including tuition, medical care, sports, music lessons, and other costs. You cannot withdraw money for your own use or for expenses that do not benefit her.

Does opening a custodial account affect my taxes?

No. The account is in her name, so the income is reported on her tax return, not yours. You do not claim the interest or earnings as your own income. However, if you are claiming her as a dependent, the account may affect your overall tax situation — ask a tax professional if you are unsure.

What if I want to change who manages the account later?

You can name a successor custodian in the account paperwork, so if something happens to you, another adult can take over managing the account. Ask your bank about this option when you open the account. Some banks allow you to change the custodian later, though the process varies.