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Choosing a savings account for kids depends on a question most guides skip: who should legally control the money? A joint account keeps a parent in charge. A custodial account makes the money the child’s property. A teen-owned brokerage account puts a 13-year-old in the driver’s seat. Each choice changes the insurance, the taxes and the day the child gets full access. Below are those differences, the numbers behind them and a rate comparison on a monthly deposit.
Three kinds of savings account for kids
Most families end up choosing among three structures. Capital One’s Kids Savings Account disclosure shows the first. It is a joint account between a child under 18 and a parent or legal guardian. Either owner can withdraw, transfer or close it without the other’s consent. The second is a custodial UTMA or UGMA account, where an adult manages assets that belong to the child. The third is a teen-owned brokerage account such as Fidelity Youth, which is for ages 13 to 17.
| Feature | Joint kids savings | Custodial (UTMA/UGMA) | Teen brokerage (Fidelity Youth) |
|---|---|---|---|
| Who owns the money | Parent and child jointly | The child; an adult is custodian | The teen |
| Typical use | Cash savings | Cash or investments | Stocks and funds |
| Insurance | FDIC if held at an insured bank | FDIC if held at an insured bank | SIPC, not FDIC |
| Parent control | Either owner can withdraw | Custodian manages | Parent cannot trade or withdraw |
| Age limits | Under 18 for the kids account | State law sets the age of transfer | 13 to 17 |
What a joint savings account for kids requires at Capital One
The disclosure is dated October 14, 2026. It says there is no minimum opening deposit and no minimum balance to earn the disclosed APY. The rate itself did not display on the page when we checked, so confirm it before you apply. If the child is 12 or younger, a parent or guardian must be a joint owner, and only the adult can move money in or out. Children 13 to 17 can transfer only between the Kids Savings account and a Capital One MONEY Teen Checking account. At 18, the child becomes a joint holder with equal privileges.
The adult must be a U.S. citizen or lawful permanent resident with a U.S. address and a Social Security number. For a rate comparison across banks, see our best high-yield savings accounts guide, since a parent’s own high-yield account is sometimes the better engine for a child’s goal.
How the FDIC treats a child’s account
Deposit insurance works differently for custodial accounts. The FDIC’s guide to single accounts says UTMA and UGMA accounts receive pass-through coverage. The child is treated as the owner, and the account is insured under the child’s single-account category. The limit is $250,000, combined across all single accounts the child holds at the same insured bank. The custodian’s personal accounts are insured separately. Our FDIC insurance limit guide explains the other ownership categories.
Fidelity’s page says its Youth account is covered by SIPC, not the FDIC. That protects against a broker failure, not a market loss. It is a different kind of safety for a different kind of account.
The tax catch: the kiddie tax
Interest in a child’s name is the child’s income. Large balances can trigger the kiddie tax. According to the IRS’s draft 2026 instructions for Form 8615, unearned income over $2,700 is taxed at the parent’s rate when that rate is higher than the child’s. The IRS’s instructions for the 2025 return apply the rule to children under 18, certain 18-year-olds and some full-time students under 24.
| Balance at 3.75% APY | Interest in a year | Over the $2,700 line |
|---|---|---|
| $10,000 | $375 | None |
| $50,000 | $1,875 | None |
| $72,000 | $2,700 | Right at the line |
| $80,000 | $3,000 | $300 |
A child needs a balance of about $72,000 at 3.75% before interest alone reaches the threshold. That is why the kiddie tax matters mainly for large gifts or inheritances. At the 0.38% national average, the balance would have to be far higher.
What $50 a month does over 18 years
Picking a savings account for kids is partly a question of rate. We compared a top-tier rate of 3.75%, which Synchrony Bank was paying on November 2, with the FDIC’s national average of 0.38%. We assumed $50 deposited at the end of each month for 18 years, with the rate held constant.
| Rate | Total deposited | Balance after 18 years | Interest earned |
|---|---|---|---|
| 3.75% APY | $10,800 | $15,295.63 | $4,495.63 |
| 0.38% APY | $10,800 | $11,175.43 | $375.43 |
The difference is $4,120.20 from the same deposits. Rates will not stay fixed for 18 years. Treat the table as an illustration of how much the starting rate matters, not as a prediction. Our look at savings rates after the Fed hike shows how far the best and average rates have drifted apart.
A savings account for kids versus other options
A savings account for kids is the safest place for money a child will need within a few years, such as a bike, a school trip or a first car fund. For goals 10 or more years out, a teen-owned brokerage account can hold stocks and funds, but it carries market risk and is not FDIC insured. Children born from 2025 through 2028 may also qualify for a Trump Account, which we explain in a separate guide. Parents who are also teaching spending habits may want to look at our guide to Google Wallet for kids.
Editor’s Take
For most families, the decision comes down to control and horizon. A joint savings account for kids is simple and insured. It lets a parent teach saving without giving a young child unsupervised access. A custodial account is a better fit for gifts that clearly belong to the child, though the child gets the money outright at the age set by state law. A brokerage account suits a teenager who already saves and wants to learn about investing. Whichever savings account for kids you pick, compare the rate first: on $50 a month, the gap between 3.75% and 0.38% is more than $4,000 over 18 years.
This is general information, not tax, legal or financial advice. Account terms and rates change, so check each provider’s current disclosure before you open an account.
