How to Start Investing for Your Child: A Step-by-Step Guide
The five-step sequence — pick the account, open it, fund it, invest simply, let it ride — and why starting is everything.
Key takeaways
- The single most important move is to start, because time does the heavy lifting.
- Pick the account for your goal: a UTMA is the flexible all-purpose choice, a 529 the education specialist, a custodial Roth the retirement powerhouse once your kid has earned income.
- The whole sequence is short: pick the account, open it, fund it, choose a simple investment, then leave it alone.
Investing for your child sounds complicated, but it comes down to a short, doable sequence — and the single most important move is simply to start, because time is the ingredient that does the heavy lifting. Here’s the whole thing in five steps.
Step 1: Pick the right account for your goal
The wrapper you choose shapes the taxes, the control, and what the money can be used for:
- UTMA custodial account — the flexible, all-purpose choice; use it for anything that benefits the child.
- 529 plan — the education specialist, with tax-free growth for school.
- Custodial Roth IRA — the retirement powerhouse, available once your kid has earned income.
- Trump Account — eligible newborns can claim a $1,000 federal seed.
Not sure which? Start with 529 vs. UTMA — and know that many families use more than one.
Step 2: Open it
Opening a brokerage account is usually quick and free at a major brokerage, often with no minimum. You’ll need your own information, your child’s Social Security number, and a bank account to fund from. (See our step-by-step walkthrough.)
Step 3: Fund it — even modestly
A small automatic monthly contribution, left alone for years, beats a big one you keep meaning to make. Consistency matters far more than the amount; even $25 a month gets the habit going and gives your kid something real to watch.
Step 4: Choose a simple investment
A broad, low-cost index fund is the common, simple first holding — instant diversification in a single purchase, so no one company can make or break the account.
Step 5: Let it ride — and make it visible
The real secret is doing nothing clever: let compounding work, and resist interrupting it, because that’s what breaks the math. And the one habit that turns money into a lifelong lesson is making it visible — a child who watches their account grow internalizes ownership, patience, and compounding far faster than any lecture. That’s exactly what MemoryBank was built for: once the accounts are open, here’s how to see all your kid’s investment accounts in one place.
This lays out the sequence. Which accounts and investments fit your specific situation is a good conversation for a CPA or fee-only planner.
Frequently asked questions
How do I start investing for my child?
Five steps: pick an account (UTMA, 529, custodial Roth, or Trump Account), open it at a brokerage, fund it — even modestly — choose a simple low-cost index fund, then let it compound. The biggest move is just to start, because time does the heavy lifting.
What is the best account to start investing for a child?
It depends on the goal: a UTMA for flexibility, a 529 for education, a custodial Roth IRA once the child has earned income, and the Trump Account seed for eligible newborns. Many families use more than one.
How much money do I need to start investing for my kid?
Often very little — many custodial accounts have no minimum, and fractional shares let you start with as little as $25. A small automatic monthly contribution matters more than a large one-time deposit.
What should I invest in for my child?
A broad, low-cost index fund is the common, simple first holding because it diversifies across hundreds of companies in one purchase. Which specific fund is right for you is a question for a financial advisor.
When should I start investing for my child?
As early as possible. The younger you start, the more time compounding has to work — that long runway is the single biggest advantage a child's account has.
What's the best way to invest for a child's future?
For most families the best plan is: open the right account for your goal (a custodial brokerage/UTMA for flexibility, a custodial Roth IRA once the child has earned income, or a 529 for college), invest it in a broad, low-cost index fund rather than trying to pick winners, automate a regular contribution, and start as early as possible so compounding has decades to work. Simplicity plus time beats cleverness.
Written by Josh Ackerman
Founder of MemoryBank. A computer scientist and M.B.A. with 20+ years of investing and technology experience, Josh built the first MemoryBank in his basement so his three kids could watch their own accounts grow. More about Josh →
See it in one place
MemoryBank shows your kid's UTMA, 529, Roth IRA, brokerage, and savings in one place — across every institution — and explains their accounts and how investing works in age-appropriate terms they actually understand.
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MemoryBank is a display and education tool, not a financial advisor. Nothing here is investment, tax, or legal advice. Verify program details with the IRS, your tax advisor, or a licensed financial professional before making decisions.