Custodial Brokerages for Kids: A 2026 Parent's Guide to First Investments

Something quietly shifted in the last two years. The average age a kid in the U.S. starts investing is now 12, and it keeps dropping [1]. That's not because more 12-year-olds suddenly got interested in markets. It's because parents and grandparents have an easier time opening a kid-friendly investment account than at any point in history.

A decade ago, opening a custodial account meant a stack of paperwork at a brick-and-mortar broker. In 2026, you can do it on your phone in 15 minutes through Fidelity, Schwab, or a kid-focused app like Greenlight or GoHenry. The hard part isn't opening the account. The hard part is what you do next.

A custodial brokerage account is an investment account that an adult opens and manages on behalf of a minor. The two most common types are UTMA (Uniform Transfers to Minors Act) and UGMA (Uniform Gifts to Minors Act). Both let you invest in stocks, ETFs, and mutual funds for a kid until they reach the age of majority, which is 18 or 21 depending on your state.

Once the kid hits that age, the money is legally theirs. No strings, no parental veto. That's important to know before you put a lot into one. It's a real handoff.

Two different tools for two different jobs. A custodial brokerage holds anything you want to invest, with no income requirement. A custodial Roth IRA, on the other hand, requires the kid to have earned income from a real job, like a paper route, a babysitting gig, or yard work for neighbors.

If your kid is too young to earn money, you're using a custodial brokerage. If they have earned income, even a few hundred dollars a year, the Roth is a fantastic add-on because the money grows tax-free and can be withdrawn later for college or a first home. Most families end up with both eventually.

The process at any major brokerage looks similar. You'll need:

• Your Social Security number and the kid's Social Security number
• Your driver's license
• A bank account to fund the account
• The kid's full legal name and birthdate

Fidelity's Youth Account is one of the most popular options because it lets the kid log in and see their own portfolio starting at 13, with parent oversight built in [4]. Schwab, Vanguard, and E-Trade all offer traditional UTMA/UGMA accounts that work the same way [5]. Funding can start at $0, though most parents kick things off with anywhere from $25 to $500.

If you want guardrails on the kid's spending side too, services like Greenlight, GoHenry, and Step bundle a debit card, savings buckets, and a small investing menu in one app. They're easier for younger kids but charge monthly fees, so weigh that against opening a free account at a traditional broker.

This is where parents freeze. The simple answer for most families is one or two broad-market index ETFs and call it a day.

A good starter portfolio for a kid:

1. 80% in a total U.S. stock market ETF like VTI or ITOT.
2. 20% in a total international stock ETF like VXUS or IXUS.

That's it. Boring is the point. Boring index funds beat 90% of stock pickers over 20-year stretches, and your kid is going to hold this for at least a decade. Don't pick individual stocks unless your kid is really curious about a specific company, in which case you can let them buy one or two shares for the experience. Treat that part as the tuition for a lesson, not the main investment.

The Mastercard 2026 youth financial literacy report puts it well: kids learn the most when they have a small amount they actively choose, plus a larger amount that's handled with discipline [2]. The same logic applies to investing. Let the small bucket be the playground. Let the big bucket be on autopilot.

This is the part that breaks most parents. You open the account, you put money in, and now you're supposed to teach a 9-year-old about compound interest? Without sounding like a textbook?

A few things that actually work:

Use real numbers from their account. "Last month your account went up $14. The market did well. Some months it'll go down $20. Over time, more up than down." Concrete beats abstract every time.

Let them watch the chart for one stock they care about. Disney, Roblox, Nintendo, whatever. Don't make them invest in it, just track it for a year. They'll see for themselves how stocks bounce around.

Match their savings. Some families use a dollar-for-dollar match for any money the kid puts into their custodial account. It mimics what an employer 401k match feels like and makes the investing decision feel like free money, which it kind of is.

Members Trust Federal Credit Union's 2026 parent guide flags one common mistake: parents who try to make every transaction a teachable moment burn the kid out fast [3]. Pick a quarterly check-in. Keep it short. Five minutes looking at the account together over breakfast does more than a 45-minute Saturday lecture.

Kids don't usually owe much. The first $1,300 of investment income (in 2026) is tax-free. The next $1,300 is taxed at the kid's rate, which is usually nothing or very low. Above $2,600, the "kiddie tax" kicks in and the income is taxed at the parent's rate.

For most families with a few thousand dollars in a custodial account growing slowly, none of this matters in any given year. If you're putting in serious money, like $10,000 plus per year from grandparents, talk to a tax pro before you open the account. Sometimes a 529 plan for college or a Roth IRA for the kid (if they have earned income) is more tax-efficient.

The legal handoff happens at 18 or 21 depending on your state, and you can't override it. But the practical handoff, where the kid actually starts making investment decisions, can start much earlier.

A loose timeline that works for most families:

Age 8 to 11: Parent makes all decisions. Kid sees the account quarterly. You explain in plain words what the money's doing.

Age 12 to 14: Kid picks one or two individual stocks (small amounts) to track and own. Parent still controls the rest.

Age 15 to 17: Kid leads quarterly check-ins. Parent acts as advisor, not decision-maker. Discuss any deposits or rebalances together.

Age 18 (or 21): Account legally transfers. Kid takes over fully.

The goal is that by the time the law forces a handoff, the kid has already been running the account for two or three years with you watching. Nothing breaks because the muscle is already there.

A few patterns to avoid:

Funding the account but never showing the kid. The whole point is the learning. Money in a sealed account doesn't teach anything. Open it together, show them the dashboard, talk about what they own.

Picking exotic investments to look smart. Crypto, single tech stocks, options. None of this belongs in a kid's first account. The lesson is consistency, not cleverness.

Forgetting it becomes the kid's money. At 18 or 21 they can withdraw the whole thing and buy a sports car. If you wouldn't be okay with that, don't put life-changing amounts in a UTMA. Use a 529 or trust instead.

Not revisiting the plan. Set a recurring reminder once a year to talk about the account, what it's doing, and whether anything should change. Most families set it for the kid's birthday.

How much money should I start a custodial account with?

Any amount works. $25 to $100 is fine to begin. The number is far less important than consistency. A $25 monthly contribution started at age 5 will outperform a single $5,000 deposit at age 17 because compounding has more time to do its job.

Can grandparents fund the account?

Yes, and they often want to. Anyone can contribute to a custodial account by transferring money to it. For larger gifts, the annual gift-tax exclusion is $19,000 per donor per recipient in 2026, so most family contributions stay well under the reporting threshold.

What happens if my kid doesn't want the money for college?

It's their money. Once they hit the age of majority, they can spend it on college, a car, a business, or anything else. That's the trade-off with custodial accounts versus 529 plans. If college is the only goal, a 529 is more controlled and tax-advantaged.

Should I use a kids' app like Greenlight or a regular brokerage?

Kids' apps are easier to set up and have built-in lessons, which helps younger kids stay engaged. Regular brokerages are free and offer more investment options. Many parents start with an app for ages 7 to 12 and migrate to a Fidelity or Schwab account when the kid hits middle school.

How does this affect financial aid for college?

Money in a custodial account counts as the student's asset on the FAFSA, which is weighted more heavily than parent assets. If college aid eligibility matters to you, talk to a financial planner about whether a 529 (parent-owned) might be a better vehicle for some of the money.

1. Marketplace: Kids' Allowances Are Getting Modern Upgrades (Jan 2026)
2. Mastercard: How Parents Can Teach Kids Financial Literacy at Every Age (2026)
3. Members Trust FCU: Parents' Guide to Teach Kids About Money in 2026
4. Fidelity: Youth Account Overview
5. Charles Schwab: Custodial Account (UTMA/UGMA) Guide