Yes, you can open a savings account for your niece, but the rules depend on her age and your relationship to her

If your niece is under 18, you can open a custodial savings account (also called a minor account) in her name with yourself as the custodian. You'll need her Social Security number, birth date, and a form of ID. Most banks allow this for children as young as newborns. If she's 18 or older, she can open her own account without you, though you can still help her do it or gift money into an account she controls.

The custodial account belongs to your niece legally—you're managing it until she reaches the age of majority (18 or 21, depending on your state). You can deposit money, make withdrawals to pay for her needs, and watch it grow. When she turns 18 or 21, the account transfers to her full control, and you step out as custodian.

Key Takeaways

  • A custodial account is held in your niece's name with you as the adult manager, and it belongs to her from day one for tax purposes.
  • You'll need her Social Security number, proof of her identity or birth certificate, and your own ID to open the account at a bank or credit union.
  • Any interest or earnings in the account are taxed as her income, not yours, which often means lower taxes on the money.
  • When your niece reaches 18 or 21 (depending on your state), the account becomes hers to control and you can no longer manage it.
  • Some banks offer youth savings accounts with lower minimums and no monthly fees, designed specifically for accounts opened by parents or guardians.

What you need to open a custodial account

Bring your niece's Social Security number and either her birth certificate or a state ID. If she doesn't have a Social Security number yet, you can request one from the Social Security Administration before opening the account, or some banks will let you open the account and add the number later. You'll also need your own government-issued ID and proof of your address (a recent utility bill or lease works).

Different banks ask for different documents, so call ahead or check the bank's website. Credit unions often have simpler requirements than large national banks. Some banks require a minimum deposit to open—often $25 to $100 for youth accounts—while others have no minimum.

How custodial accounts work and who controls the money

You deposit money into the account, and it sits there in your niece's name. As the custodian, you can withdraw money to pay for her needs—school supplies, medical bills, sports fees, or anything that benefits her. You're not borrowing from her; you're managing money that is legally hers. The bank statements will show her name, not yours.

You cannot use the money for your own expenses or treat it as a loan to yourself. If you withdraw money and spend it on yourself, you're taking money that belongs to your niece. Some custodians set up automatic transfers or use the account only for specific purposes (like birthday gifts or holiday money) to keep things clear.

When your niece turns 18 or 21 (the age varies by state—check your state's law), the account automatically transfers to her control. At that point, you have no say in how she uses it, and you can no longer make withdrawals without her permission.

Tax treatment of custodial accounts

The money in the account is your niece's income for tax purposes, not yours. If the account earns interest or sits in an investment account that generates dividends, those earnings are taxed at her rate, which is usually much lower than yours. This is one reason custodial accounts can be useful—the tax bill stays small.

In 2024, the first $1,450 of unearned income (interest, dividends) is tax-free for a dependent child. Income between $1,450 and $2,900 is taxed at her rate. Above $2,900, it's taxed at your rate. These thresholds change yearly, so check the IRS website for the current year. If the account earns very little, you may not need to file a tax return at all.

Custodial accounts versus other ways to save for your niece

A Uniform Transfers to Minors Act (UTMA) account or Uniform Gifts to Minors Act (UGMA) account is the formal name for a custodial account. Both work the same way—you're the custodian, she's the owner. The difference is mainly legal and varies by state; UTMA is newer and covers more types of assets. When you open a custodial account at a bank, you're usually opening a UTMA or UGMA account, though the bank may just call it a "minor account" or "youth account."

A 529 college savings plan is different—it's designed specifically for education expenses and has tax advantages for that purpose. Money in a 529 grows tax-free if used for tuition, books, or room and board. If you withdraw it for other reasons, you pay taxes and a penalty on the earnings.

A trust account is more formal and expensive to set up (you need a lawyer), but it gives you more control over when and how your niece gets the money. You can specify that she doesn't get full access until age 25 or 30, or that money goes to her only for college. A custodial account doesn't let you do that—she gets it all at 18 or 21.

Where to open a custodial account

Most banks and credit unions offer custodial savings accounts. National banks like Chase, Bank of America, and Wells Fargo have them. Local credit unions often have lower fees and simpler processes. Online banks like Ally and Marcus also offer custodial accounts, sometimes with higher interest rates on savings.

Call or visit the bank's website and ask for their youth or minor savings account. Tell them you want to open a custodial account for your niece. They'll walk you through the paperwork. The whole process usually takes 15 to 30 minutes in person or online. You'll get a debit card in her name (if she's old enough to use one safely) or just a passbook or online access.

What happens when your niece turns 18 or 21

The account automatically converts to a regular account in her name. You receive notice from the bank that the custodianship has ended. At that point, she can withdraw all the money, close the account, or keep it open and continue saving. You have no further control or access unless she gives you permission.

Some custodians have a conversation with their niece before this happens, explaining what's in the account and how to manage it. Others just let the transition happen. There's no legal requirement to tell her, but it's usually kinder to give her a heads-up so she's not surprised by the money or confused about how to use it.

Frequently Asked Questions

Do I need to be her parent or legal guardian to open a custodial account?

No. Most banks let any adult open a custodial account for any minor. You don't need to be a parent, guardian, or relative. However, some banks may ask why you're opening the account or may require a relationship to the child. If you're not a parent or guardian, call ahead to confirm the bank will work with you.

Can I open a custodial account if my niece already has a Social Security number?

Yes, and it's easier. Bring her Social Security number and birth certificate or ID. If she doesn't have a number yet, you can request one from the Social Security Administration (it takes a few weeks) or open the account and add the number later.

What if I want to give money to my niece but don't want her to have full access at 18?

A custodial account won't work for that—she gets full control at 18 or 21. You'd need a trust, which requires a lawyer to set up. A trust lets you specify that she gets the money at 25, 30, or only for certain purposes like college. It costs more upfront but gives you control over timing and use.

Can I withdraw money from the account for my own needs?

Legally, no. The money belongs to your niece. Withdrawing it for yourself is taking her money. Some custodians do this anyway, but it's not permitted and could cause problems if your niece or her parents find out. If you need to borrow money, it's better to ask directly than to take it from her account.

Does opening a custodial account affect her ability to get financial aid for college?

Yes, it can. Money in a custodial account is counted as the student's asset when calculating financial aid, which can reduce the amount of aid she receives. A 529 plan is often better for college savings because it's treated differently in aid calculations. Talk to a financial aid advisor if college savings is your main goal.