How Is Income in a Custodial Account Taxed?
A custodial account can look like it belongs to the adult managing it, but when tax season arrives, the money is treated as if it belongs to the child.
The short answer
Interest, dividends, and capital gains earned inside a custodial account are generally taxed to the minor who owns the assets, not to the custodian who manages the account, because the child is the legal owner even though an adult controls it until a certain age. Special rules can apply that tax part of a child’s unearned income at a parent’s rate rather than the child’s own rate.
Why ownership determines the tax treatment
A custodial account is set up so that the assets legally belong to the minor from the moment they’re deposited or transferred in, even though the custodian — usually a parent or guardian — makes the investment and spending decisions until the child reaches the age set by state law. Because the child is the owner, income generated inside the account is generally attributed to the child for tax purposes, which is a different arrangement than, say, a parent simply holding money in their own account earmarked informally for a child.
The role of a special rule for children’s unearned income
A rule sometimes referred to informally as the kiddie tax applies to certain unearned income — interest, dividends, and capital gains — earned by a child, and it can cause a portion of that income to be taxed at a parent’s marginal rate rather than the lower rate a child might otherwise pay. The specific thresholds and mechanics of this rule are set by the government and change over time, so anyone managing a custodial account should treat the exact numbers as something to verify each year rather than assume from memory.
How this differs from a parent’s own account
If a parent simply held money in their own name and spent it on a child later, any interest or gains along the way would be taxed to the parent as the account owner, following ordinary tax rules for that parent’s income level. A custodial account works differently because the ownership itself has shifted to the child at the time of the transfer, which is the whole point of the structure — it’s a completed gift, not money the parent still owns. This is one reason custodial accounts are sometimes compared with other options, like a custodial investment account for a child versus keeping funds in the parent’s own name.
Recordkeeping that tends to matter
- Track contributions separately. Because the child owns the account, records of what was deposited over time can matter for tax reporting and for understanding what’s a gift versus what’s growth.
- Watch the type of income. Interest, qualified dividends, and capital gains can each be taxed somewhat differently, so the composition of the account’s income matters, not just the total.
- File on the child’s behalf. In some situations a child’s taxable income needs to be reported on their own return, or in others it can be included on a parent’s return, depending on the amount and type of income involved.
- Reassess as the child ages. Once the child reaches the age of majority set by their state, the account typically converts to their outright control, which can also change how future income is taxed.
What to weigh
Custodial accounts offer a straightforward way to hold and grow money for a minor, but the tax treatment isn’t as simple as “it’s the child’s money, so it’s taxed at the child’s low rate.” Because a portion of unearned income can be taxed at a parent’s rate, and because rules around thresholds and reporting change over time and depend on individual circumstances, checking current guidance before assuming how a given year’s income will be taxed is worth the extra step.