Best Savings Account for a Baby: What High-Income Parents Should Open First

By Kevin Luu, Co-Founder and Chief Learning Officer. Reviewed on 2026-09-30.

For most high-income families, the best “savings account” for a baby is not a bank savings account. It is a 529 plan owned by a parent for education money, plus the free $1,000 Trump Account deposit if your child was born from 2025 through 2028, with ordinary cash kept in your own high-yield savings account. A savings or custodial account in the baby’s own name is usually the last account to open, not the first.

The reason is simple. At a household income of $750,000 or more, the account’s tax treatment and who controls it matter far more than the interest rate. A bank account earning a few percent, taxed at your top rate, rarely keeps up. An account that belongs to your child outright becomes theirs at 18 or 21, whether or not they are ready.

The accounts you can open for a newborn, compared

These are the accounts a California or Washington family typically weighs in the first year. Limits are for 2026.

Why a 529 is usually the first account for a high-income family

A 529 plan does three things a baby savings account cannot. Growth is never taxed if the money pays for qualified education. The parent stays the owner, so the money does not transfer to your child at 18. And you can change the beneficiary to another family member, such as a younger sibling, if plans change.

California gives no state deduction for 529 contributions for 2026 (a bill to create one, SB 529, died in the Legislature). That means a California family is free to pick any state’s plan on fees and investment options, not only ScholarShare 529. Earnings still grow free of California tax, and qualified withdrawals are California tax-free. One caution: California does not follow several newer federal expansions of what a 529 can pay for (FTB 540 booklet), so check before using 529 money for anything other than college.

Washington has no state income tax on wages or 529 growth in 2026, so the plan decision there also comes down to fees and investments. High earners should note that Washington has enacted a 9.9% income tax on AGI over $1,000,000 starting in 2028, which could make tax-free growth more valuable over an 18-year horizon.

For more on front-loading, see our guide to 529 superfunding, and the side-by-side on 529 plans versus custodial accounts.

The Trump Account: claim the $1,000, then decide on the rest

The Trump Account is a new type of individual retirement account for children, created by the July 2025 tax law. According to the IRS and Treasury (Notice 2025-68):

• Treasury makes a one-time $1,000 deposit for a U.S. citizen child with a Social Security number born from January 1, 2025, through December 31, 2028, once a parent files the election on Form 4547. The eligibility rules include no income test.
• Contributions from parents, relatives and employers combined are capped at $5,000 a year for 2026, and could not begin before July 4, 2026. The $1,000 federal deposit and certain government or charity contributions do not count toward that cap. The limit is indexed to inflation after 2027.
• An employer may contribute up to $2,500 a year for an employee’s child, and that amount is not taxable income to the employee.
• The money must be invested in mutual funds or ETFs tracking the S&P 500 or a similar U.S. stock index, and generally cannot be withdrawn before January 1 of the year the child turns 18.

For a family already in a high bracket, the $1,000 deposit and any employer contribution are free money and worth claiming. Extra parent contributions are a closer call. The IRS treats a Trump Account as a traditional IRA (Notice 2025-68), so earnings are taxed as ordinary income when they come out. Parent contributions come back tax-free as basis, but the $1,000 deposit and employer money do not. Qualified 529 growth is not taxed at all. For education money, the 529 usually comes first. Ask your HR team whether your employer plans to contribute.

How much does $1,000 become? At a hypothetical 5% a year, $1,000 compounded for 18 years grows to about $2,407. At a hypothetical 6%, it grows to about $2,854. Neither rate is a forecast.

Worked example: a $1.1 million household in San Mateo

Assumptions (illustrative only): married couple filing jointly, $1.1 million in combined W-2 pay, one parent at a biotech company with RSUs. Their daughter is born in March 2026. They want to put $95,000 toward her future now and are choosing between a 529 and a regular brokerage account in their own names. We assume a hypothetical 6% annual return for 18 years and 2026 federal rates with 2025 California rates (the latest published).

1. Open the 529. One parent contributes $95,000 and elects on Form 709 to spread it over five years, so it is treated as five $19,000 gifts and, as long as that parent makes no other gifts to her during those five years, uses none of the parent’s $15,000,000 lifetime exclusion. At 6%, it could grow to about $271,162 after 18 years, of which about $176,162 is growth.
2. Compare the brokerage account. If the same growth were realized in a taxable account at this family’s rates, it could owe 20% federal long-term capital gains tax, the 3.8% net investment income tax, and California’s 12.3% marginal rate at this income (11.3% bracket plus the 1% Behavioral Health Services Tax on taxable income over $1 million). California has no lower rate for capital gains. That is 36.1% combined, or about $63,595 of tax on $176,162 of growth. In the 529, spent on qualified education, the tax is zero.
3. File the Trump Account election. Form 4547 claims the $1,000 deposit. The biotech parent checks whether the employer adds up to $2,500 a year.
4. Keep cash in the parents’ own high-yield savings account. Money for childcare, a nanny’s first months, or a larger home stays in the parents’ names, where they keep control and the interest is simply part of their own return.

A Washington family with the same numbers faces a different state picture. Under current Washington law, the 7% capital gains tax applies only to long-term gains above the state standard deduction ($278,000 for 2025, the latest published), so gains of this size in a single year may owe no state tax. But Washington’s new 9.9% income tax on AGI over $1,000,000 starts in 2028, and a household at this income could be subject to it when the gains are realized years from now; the Department of Revenue has not yet said how it will interact with the capital gains tax. The federal 23.8% would still apply either way, so the 529 still usually comes first for education money.

When a custodial or baby savings account does make sense

A UTMA account is a permanent gift. Once money goes in, it legally belongs to your child. In California, the account passes to the child at 18 by default, or up to 21 if the gift document says so (Probate Code §3920.5). In Washington, most gifts pass at 21 (RCW 11.114.200). Grandparents who want to give outside a 529, or a family that wants money set aside for non-education goals, may still choose one. Our guide to UTMA gifting rules covers the details.

The kiddie tax keeps the tax benefit small. For 2026, the first $1,350 of a child’s investment income is tax-free, the next $1,350 is taxed at the child’s rate, and anything over $2,700 is taxed at the parents’ rate (Rev. Proc. 2025-32). A savings account in your child’s name is most useful later, around age six to ten, as a teaching tool with small amounts the child earns or receives.

A custodial Roth IRA is not available for a baby in practice. Contributions are limited to the lesser of $7,500 for 2026 or the child’s earned income from real work (IRS Pub 590-A). Allowance and gifts do not count.

Common mistakes we see with newborn accounts

• Opening a bank “baby account” first because the bank offers one, then leaving it earning little while taxed at a high bracket.
• Putting large sums in a UTMA without realizing the child controls it at 18 or 21.
• Treating $19,000 as a legal limit. It is the 2026 gift tax annual exclusion per donor per recipient. Larger gifts just require Form 709 and use part of the lifetime exclusion.
• Missing the Trump Account election, or an employer contribution, because nobody filed Form 4547.
• Choosing ScholarShare by default in California when there is no state deduction to capture.

What to write down for your child

The account matters less than whether your child later understands why it exists. Write one page now: which accounts you opened, what each is for, who can add to them, and what you hope the money teaches. Add the reasoning, not just the balances. As Kevin Luu puts it: “Your kids don’t need to inherit your portfolio. They need to inherit your decision-making process.” Our Age Five Wealth Education work starts from that page, and the FamilyKnowledge® System keeps it current as the family grows.

Frequently asked questions

Should grandparents open their own account for our baby?

They can. A grandparent-owned 529 keeps control with the grandparent and can use their own $19,000 annual exclusion for 2026, or $95,000 with the five-year election. Coordinating with your plan avoids duplicate accounts and helps everyone see the full education picture. A UTMA from a grandparent passes to the child, typically at 18 or 21 depending on the state and the transfer document.

Is a high-yield savings account in the baby’s name a good idea?

Usually not at this income. Interest is small, counts toward the kiddie tax, and the account often becomes the child’s property. Keep your emergency and near-term cash in your own name. A small savings account in the child’s name works better around school age, when your child can see deposits and interest and learn from them.

Do we qualify for the $1,000 Trump Account deposit at our income?

Yes, if your child is a U.S. citizen with a Social Security number and was born from 2025 through 2028. The IRS eligibility rules for the pilot deposit list no income test. You make the election on Form 4547 or through your IRS online account, and Treasury deposits the $1,000 once the account is set up.

Next step

Pick the 529 plan, file Form 4547, and write the one-page note for your child this month. If you want to see how these accounts fit with your RSUs, estate documents and taxes, our Tax & Wealth Assessment maps it in one session, and the estate planning side covers guardians and trusts for minors.

This is general education, and the right move depends on the family’s full picture.

Written by

Kevin Luu

Co-Founder and Chief Learning Officer, Bright Advisers

Kevin has advised high-income W-2 tech and biotech families since 2015, and leads the education-first Age Five Family Office from Brea, California.

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