Yes, but the account structure depends on your nephew's age and your relationship to him

You can open a savings account in your nephew's name, but the rules change sharply at age 18. Before that, the account must be a custodial account — held in your name as custodian, with your nephew as the beneficiary. At 18, he gains legal control of the money, and you lose it. After 18, you cannot open an account in his name without his signature and presence, just as you cannot for any adult.

The bank will ask for your nephew's Social Security number, date of birth, and address. If he is a minor, you will also need to prove you have the legal right to act on his behalf — usually a birth certificate showing you are a relative, though some banks ask for custody papers or parental consent. Call ahead: requirements vary by bank and by state.

The money in a custodial account belongs to your nephew from the moment you deposit it, even though you control it until he turns 18. You cannot use it for yourself, and you cannot take it back. This is a legal distinction that matters for taxes, for his financial aid later, and for what happens if you die.

Key Takeaways

  • A custodial account is the standard structure for minors and requires proof of your relationship to your nephew, usually a birth certificate.
  • You control the account until your nephew turns 18, at which point he gains full legal access and you lose all authority.
  • The money belongs to your nephew for tax purposes from day one, even though you manage it, which affects how interest is reported.
  • After your nephew turns 18, you cannot add money to the account or make withdrawals without his written permission.
  • If your nephew's parents object or if custody is disputed, the bank may freeze the account or require parental consent before opening it.

How custodial accounts work and what happens at age 18

A custodial account is a legal wrapper that lets you manage money for a minor. You are the custodian — the adult with signing authority. Your nephew is the beneficiary — the person who owns the money. The bank holds the account in both names, usually written as "Your Name, Custodian for [Nephew's Name]" or "Your Name as Custodian for [Nephew's Name] under the [State] Uniform Transfers to Minors Act."

While your nephew is under 18, you can deposit money, withdraw it, and move it without his permission. You decide how it is spent. But the money is legally his. If you die, the account does not go to your estate — it goes to him, or to a guardian you name in your will. If you get sued, creditors cannot touch a custodial account because it is not your asset.

At 18, the account transfers automatically to your nephew's sole control. He can withdraw all of it, close it, or leave it alone. You have no say. Some states let you delay the transfer until 21 or 25 if you set it up that way, but you must choose this at the time you open the account — you cannot change it later. Check your state's rules before you open the account, because this choice is permanent.

What documents you need and where to open the account

Bring your nephew's Social Security number, date of birth, and current address. Bring your own ID. Bring a birth certificate or adoption papers showing your relationship to him — the bank needs proof you are actually his relative, not a stranger. Some banks also ask for parental consent in writing, especially if your nephew's parents are not present. Call the bank before you go in and ask what they require for a minor's custodial account.

You can open a custodial account at any bank, credit union, or brokerage that offers them. Most large banks do. Credit unions sometimes have lower fees and simpler structures. Online banks usually offer custodial accounts too, though you may have to mail in documents or verify your identity through video. Brokerages like Fidelity and Vanguard offer custodial accounts if you want to invest the money rather than keep it in savings.

The account itself is straightforward: you choose a savings account, money market account, or certificate of deposit, depending on how long you want the money to sit and what interest rate you want. The bank will explain the fees, the minimum balance, and the interest rate. There is no special cost for making it custodial — it is just a legal designation.

Tax reporting and how interest is handled

Interest earned in a custodial account is taxed to your nephew, not to you, even though you control the account. The bank will send a 1099-INT form to your nephew's Social Security number at the end of the year. If your nephew is a minor and has no other income, the first $1,250 of interest (the exact amount changes yearly) is usually not taxable. Above that, he owes tax on it.

You do not report the account on your own tax return. You do not claim the interest as income. This is one reason custodial accounts affect your nephew's financial aid later — when he turns 18 and applies for college, the account shows up as his asset, not yours, and reduces his aid may be able to access. If you want to help him pay for college without affecting his aid, a custodial account is not the best tool. A 529 plan in your name, or a gift to his parents, works differently for aid purposes.

Keep records of deposits and withdrawals. If you ever need to prove what the money was for — whether it was a gift, a loan, or something else — the bank statements are your evidence. This matters if there is ever a dispute with his parents or if your nephew questions the account later.

What happens if your nephew's parents object

If your nephew's parents did not consent to the account and they object, the bank may ask for written permission before you open it. Some banks require parental consent for minors under 16. If the parents are married and both have custody, both may need to sign. If custody is disputed or if one parent objects, the bank may refuse to open the account or may freeze it after you open it.

This is a real risk. Before you open the account, talk to your nephew's parents. If they are uncomfortable with it, opening it anyway can create legal problems later. If the parents are deceased or if you have legal guardianship, bring those documents to the bank.

If the account is already open and the parents object, the bank can close it. You would get the money back, but the account would be gone. It is better to have the conversation first.

What you cannot do with a custodial account

You cannot use the money for yourself. If you deposit $5,000 for your nephew and then withdraw $2,000 to pay your own bills, that is theft, legally speaking. The money belongs to him. You can spend it on things that benefit him — his education, medical care, housing, food — but not on your own expenses.

You cannot take the money back if you change your mind. Once it is in the account, it is his. If you die before he turns 18, it goes to him or to a guardian, not back to your estate. If you want to give him money but keep the option to take it back, a custodial account is not the right tool — you would need a loan agreement or a different arrangement.

You cannot name a different beneficiary. The account is for your nephew. You cannot change it to his sister or to your own child. If you want to help multiple relatives, you open separate accounts for each one.

Alternatives if a custodial account does not fit your situation

If you want to help your nephew but do not want to give up control at 18, a 529 education savings plan in your name lets you keep control of the money and use it for his college costs. You can change the beneficiary to another relative if he does not go to college. The money grows tax-free if used for education.

If you want to give money to his parents to manage, you can straightforward give it to them as a gift. They can save it however they want, and there is no legal structure involved. This is simpler but gives you no control over how it is used.

If you want to leave money to your nephew in your will, you can name him as a beneficiary and let your estate handle it after you die. You do not need to open an account now. This is useful if you want to help him but are not ready to give him the money yet.

Frequently Asked Questions

Do I need my nephew's parents' permission to open a custodial account?

It depends on the bank and your state. Some banks require written parental consent for minors under 16. If both parents have custody, both may need to sign. Call the bank first and ask. If the parents object, the bank may refuse to open the account or may close it later.

What happens to the account if I die before my nephew turns 18?

The account goes to your nephew, or to a guardian you name in your will. It does not go to your estate. If you want someone else to manage it for him until he is older, name that person as guardian in your will and tell the bank about it.

Can my nephew access the account before he turns 18?

Not without your permission. You control it until he is 18. Some banks let minors see the balance online, but only you can withdraw money or make changes. At 18, he gains full access automatically.

Will a custodial account hurt my nephew's chances of getting financial aid for college?

Yes. The account counts as his asset when he applies for federal student aid, which reduces his may be able to access. A 529 plan in your name, or money given to his parents, is treated differently and may not affect his aid as much.

Can I change the account to a different beneficiary if my nephew does not need the money?

No. A custodial account is for one specific beneficiary. If you want to help a different relative, you open a separate account for them. If you want flexibility to change beneficiaries, a 529 plan in your name is a better choice.