Yes, you can open a savings account for your grandchild, but the account structure depends on the child's age and your role

If your grandchild is under 18, you have three main paths: open a custodial account in their name with you as custodian, open a joint account with them, or open an account in your own name and gift the money to them later. The custodial account is the most common choice because it gives the child ownership and control at a set age (usually 18 or 21, depending on your state), while you manage the money until then. A joint account lets both of you access the funds when ready, but that creates complications if you later need the money for your own care. An account in your name alone is simplest to set up but offers no legal protection if something happens to you—the money becomes part of your estate.

If your grandchild is already 18 or older, they can open their own account and you can straightforward deposit money into it, or they can add you as an authorized user so you can help manage it. The age and your state's laws determine which option makes sense for your situation.

Key Takeaways

  • A custodial account (also called a UGMA or UTMA account) is held in your grandchild's name with you as the adult custodian, and transfers to them automatically at age 18 or 21 depending on your state.
  • Joint accounts let both you and your grandchild withdraw money at any time, which can complicate things if you need the funds for medical or long-term care expenses later.
  • Money you deposit into a custodial account is considered a gift and may affect your grandchild's financial aid may be able to access for college, though the impact is usually smaller than if the money were in your name.
  • You will need your grandchild's Social Security number and birth certificate to open any account in their name, and some banks require the child to be present in person.
  • If you want to leave money to your grandchild after you pass away, a custodial account or a will is clearer than a joint account, which can create disputes with your estate.

Custodial accounts: the most common choice for grandparents

A custodial account is a savings or investment account opened in your grandchild's name, with you named as the custodian. You control the account and make all decisions about deposits and withdrawals until your grandchild reaches the age of majority—18 in most states, 21 in a few. At that age, the account automatically becomes theirs to control, and you have no further say in how they use it.

Custodial accounts come in two types: UGMA (Uniform Gifts to Minors Act) and UTMA (Uniform Transfers to Minors Act). UTMA accounts are slightly broader and exist in more states; they can hold real estate, artwork, and other property in addition to cash and securities. UGMA accounts hold only cash and securities. Most banks and brokerages offer UTMA accounts because they are more flexible. The difference rarely matters for a straightforward savings account, but ask the bank which type they use.

To open a custodial account, you will need your grandchild's Social Security number, birth certificate, and proof of your identity. Some banks require the child to be present; others do not. Call ahead to confirm what the bank requires. There is no cost to open the account, and there are no annual fees beyond what the bank charges all savings account holders.

Joint accounts: faster access, but with real downsides

A joint account is simpler to set up than a custodial account—you and your grandchild both own it equally, and either of you can deposit or withdraw money at any time without permission from the other. This works well if you want your grandchild to learn to manage money alongside you, or if you need to be able to move money quickly in an emergency.

The problem is that a joint account is legally yours and your grandchild's property in equal shares. If you later need to move into assisted living, explore for Medicaid, or face a lawsuit, the state or creditors may treat the money in the joint account as yours and try to claim it. Some states have rules that protect joint accounts from Medicaid recovery, but not all do, and the rules are complicated. If you pass away, the money in a joint account goes directly to your grandchild outside of your will or trust, which can create conflict with your other heirs or complicate your estate.

A joint account also counts as your grandchild's asset for purposes of college financial aid, which can reduce the amount of aid they receive. A custodial account has a smaller impact on financial aid because it is treated as the child's asset rather than the parent's.

Accounts in your name only: straightforward but risky

You can straightforward open a savings account in your own name, deposit money into it, and tell your grandchild (or their parents) that the money is meant for them. This is the easiest route to set up—you need only your own ID and Social Security number—and you keep full control of the money while you are alive.

The catch is that when you pass away, the money becomes part of your estate. It does not automatically go to your grandchild. If you have a will or trust that names your grandchild as a beneficiary, the money will go to them according to those documents. If you do not have a will, your state's inheritance laws determine who gets the money, and it may not be your grandchild. If you have other heirs, they may contest the money going to your grandchild, especially if you never formally documented your intent.

This approach also leaves the money vulnerable if you face a lawsuit, medical debt, or long-term care costs. Creditors and Medicaid can claim money in your own account. A custodial account or a formal trust offers more protection because the money is legally the grandchild's, not yours.

How custodial accounts affect college financial aid

Money in a custodial account counts as your grandchild's asset when they fill out the FAFSA (Free process for Federal Student Aid). Assets in the student's name reduce their financial aid by up to 20 percent of the asset value each year. So if the custodial account holds $10,000, it could reduce their aid by up to $2,000 per year.

Money in your name (a parent's or grandparent's account) has a smaller impact—it reduces aid by up to 5.64 percent of the asset value. However, if your grandchild's parents are the ones filling out the FAFSA, they report their own assets, not yours. If you are the custodian of the account, it counts as the student's asset.

This matters most if you are saving a large amount (over $10,000 or so) and your grandchild will be explore for college aid within a few years. If the money is modest or the child is very young, the impact is usually small. Talk to the child's parents about the timing and amount before you open the account.

What documents and information you will need

To open a custodial account, gather these items before you visit the bank or start an online process:

  • Your grandchild's full legal name, date of birth, and Social Security number
  • Your grandchild's birth certificate (some banks ask for a copy)
  • Your own government-issued photo ID (driver's license or passport)
  • Your Social Security number
  • Proof of your address (recent utility bill or bank statement)

Some banks also ask for the child's parents' names and contact information. If you are opening the account online, you may be able to upload documents; if you are opening it in person, bring originals or certified copies. Call the bank ahead of time to confirm exactly what they need—requirements vary by institution.

What happens when your grandchild turns 18 or 21

When your grandchild reaches the age of majority in your state (usually 18, sometimes 21), the custodial account automatically converts to a regular account in their name. You lose the right to manage it or see the balance. The money is now theirs to use however they choose—they can spend it, invest it, or leave it alone.

This is why it is important to talk to your grandchild (and their parents) about the purpose of the account before you open it. If you hope they will use it for college or a car, say so. If you want them to understand that it is for emergencies or long-term goals, explain that too. You cannot force them to use the money a certain way once they own it, but a conversation sets expectations.

If you are concerned about your grandchild's judgment at 18, you have a few options. Some states allow you to name a successor custodian who takes over if you die before the child reaches the age of majority. You can also set up a trust instead of a custodial account, which gives you more control over when and how the money is used—but a trust is more expensive to set up and requires a lawyer. For most grandparents, a custodial account is the right balance between simplicity and protection.

Frequently Asked Questions

Can I open a custodial account if my grandchild's parents don't want me to?

Legally, yes—the account is in your grandchild's name, not the parents'. However, you will need the child's Social Security number, which the parents usually have. If the parents refuse to provide it, you cannot open the account. More importantly, if the parents object, opening an account without their knowledge can damage your relationship and create conflict over how the money is used. It is worth having a conversation first.

What if I want to take money out of the custodial account for my own use?

Legally, you cannot. The money in a custodial account belongs to your grandchild, not to you. If you withdraw money for your own purposes, you are technically taking the child's property. Some states have rules allowing withdrawals for the child's "benefit," but that is narrowly defined and does not include your own expenses. If you need access to your own money, open an account in your name instead.

Does a custodial account protect the money from my creditors?

Yes. Because the money is legally your grandchild's property, not yours, creditors cannot claim it. This is one of the main advantages over keeping the money in your own account. However, if you are the one who deposited the money and you later face a lawsuit, the other party might argue that you made the deposit to hide assets from them. This is rare and usually unsuccessful, but it is a reason to document your intent clearly—for example, by telling family members or writing a note explaining that the money is a gift to your grandchild.

Can I name someone else to take over the custodial account if I die?

Yes. When you open the account, you can name a successor custodian—usually a family member or trusted friend—who takes over if you pass away before your grandchild reaches the age of majority. The successor custodian then manages the account until your grandchild turns 18 or 21. Ask the bank about this option when you open the account; most allow it at no extra cost.

What is the difference between a custodial account and a 529 college savings plan?

A custodial account is a general savings account that can be used for any purpose. A 529 plan is a tax-advantaged savings account specifically for college and education expenses. Money in a 529 grows tax-free if used for tuition, fees, room and board, and some other education costs. If you withdraw the money for non-education purposes, you pay taxes and a 10 percent penalty on the earnings (though not the contributions). A 529 also has a smaller impact on financial aid than a regular custodial account. If you are saving specifically for college, a 529 is usually the better choice. If you want flexibility, a custodial savings account is simpler.