How to Start Investing for Your Child: A Step-by-Step Guide

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.

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.