State Deep Dive: California — 529 Policy in the Golden State

Welcome back to State Deep Dives, where we take one state at a time and dissect—with full nerd energy—exactly what 529 benefits look like for residents there. We cover state tax treatment (or the pointed lack thereof), federal advantages, quirky local considerations, and real-family examples with real numbers.

Last time, we started at the bottom of the population rankings — Wyoming, population approximately 588,753—more pronghorn than people. Today we're swinging to the opposite extreme.

Welcome to California. Population: approximately 39.5 million as of 2025, the most populous state in the nation, home to one in every nine Americans, and the site of more family financial anxiety per square mile than perhaps any other geography on Earth. (We say this lovingly). If you're raising kids in Sacramento, San Diego, or anywhere in between, you already know that the question of how to pay for college tends to arrive with urgency.

So let's get into it.

California's 529 Landscape: The (Slightly Frustrating) Short Version

California has its own 529 plan—ScholarShare 529 — managed by TIAA on behalf of the ScholarShare Investment Board. It is, by most objective measures, a solid plan: low fees, a wide array of investment options, and no enrollment or account maintenance charges. Morningstar upgraded it to Silver in October 2024, citing tighter oversight and continued fee reductions. Total annual asset-based fees range from roughly 0.05% to 0.5%, which is among the lowest nationally.

Here's the catch: California offers no state income tax deduction for 529 contributions. Not a dollar. Not a cent.

Orange surf van on Venice Beach in the Los Angeles area.

California does not offer a state tax deduction for contributions to the ScholarShare 529 plan, or to any 529 plan. And with California's marginal income tax rates running up to 12.3% (plus a 1% surcharge on income over $1 million, bringing the top marginal rate to 13.3%)—the highest in the nation—the absence of a deduction is genuinely painful for higher earners who might otherwise see meaningful state tax savings.

Lawmakers have taken notice. California SB 529, introduced in early 2025, would have created a state income tax deduction of up to $5,000 for individual filers and $10,000 for married joint filers contributing to ScholarShare 529 in California, with income limits of $75,000 and $150,000 respectively. The bill failed in the state Senate Revenue and Taxation Committee and was returned to the Secretary of the Senate on February 2, 2026. For now, the no-deduction rule stands.

There is also a California-specific penalty worth knowing about for non-qualified withdrawals: California imposes a 2.5% additional state tax on the earnings portion of non-qualified distributions, on top of regular income tax. (Federally, the penalty is 10%). Nothing catastrophic (it's just on the earnings after all), but worth keeping in mind if you ever need to pull money out for something that doesn't qualify.

The Free Agent Advantage (Yes, There Is One)

Just like Wyoming residents, California families have no state-sponsored tax incentive tying them to the in-state plan. Because there is no California deduction at all—for any plan—Californians are free to open a 529 in any state without giving anything up.

That's meaningful. In states like New York or Virginia, the state deduction is tied specifically to the home-state plan, which can effectively anchor you to a plan you might not have chosen otherwise. California families face no such constraint. You can use ScholarShare 529 in California (which is perfectly solid!), or you can look at the five Gold-rated plans identified by Morningstar in October 2025: Utah's my529, Alaska's T. Rowe Price College Savings Plan, Illinois' Bright Start, Massachusetts' U.Fund, and Pennsylvania's 529 Investment Plan.

Not sure how to choose? Hadley's Find My 529 tool is built for exactly this scenario. When there's no deduction pushing you toward a particular plan, investment quality, fees, and fit actually get to matter.

The Roth IRA Wrinkle: California's Other 529 Quirk

One more thing that sets California apart from most states regarding 529 policy: California does not conform to the SECURE 2.0 Act's provision allowing 529-to-Roth IRA rollovers to be tax-free.

Federally, unused 529 funds can be rolled into a Roth IRA for the beneficiary—up to $35,000 lifetime—tax and penalty-free, provided the 529 has been open for at least 15 years. It's one of the more significant improvements to 529 plans in recent memory. But for California taxpayers, that rollover is treated as a non-qualified withdrawal—meaning the earnings portion is subject to California income tax plus the additional 2.5% California penalty.

This doesn't make 529s a bad idea for Californians. It just makes the Roth IRA rollover escape hatch a bit pricier. And if you are ever facing leftover 529 funds after college expenses are met, you can always keep funds in the 529 for grad school, change the beneficiary to another family member, or proceed with the Roth IRA rollover anyway (having accounted for the California tax cost).

Let's Run the Numbers: Three California Families

All examples below assume a 7% average annual return and use 2026 marginal tax rates. The 7% assumption is conservative relative to the S&P 500's long-run historical average of roughly 10%, a point we've made in our prior posts. As always, past performance doesn't predict future results.

Family #1: The Oduyas—San Jose, California

Priya and Emeka Oduya are software engineers in San Jose with a combined income of $280,000. Their daughter Adaeze was born in early 2026, and they open a ScholarShare 529 in California immediately, contributing $400 per month ($4,800/year).

After 18 years, their $86,400 in contributions has grown to approximately $172,000, generating roughly $85,600 in tax-free investment earnings. At their income level, California taxes capital gains as ordinary income — so their California marginal rate of 9.3% applies to investment earnings. Federally, their long-term capital gains rate is 15%. The 529 shelters those earnings from both federal and California capital gains treatment along the way, saving the Oduyas an estimated $18,000–$22,000 in combined federal and state taxes over the 18-year life of the account.

At UC San Diego, where systemwide tuition and fees for California residents run approximately $14,934–$16,900 per year (with total cost of attendance, including housing, running $38,000–$42,000 per year), their $172,000 in savings would comfortably cover four years of college—with money to spare for graduate school, or a transfer to Adaeze's future sibling.

Total estimated federal + state tax savings: ~$18,000–$22,000

Family #2: The Ferreira-Blancos—Fresno, California

Marco and Luz Ferreira-Blanco are a teacher and a nurse in Fresno earning $115,000 combined. Their son Tomás is four years old, and they've just learned about 529 plans (better late than never). They open a ScholarShare 529 in California today, contributing $250 per month ($3,000/year).

After 14 years, their $42,000 in contributions has grown to approximately $72,500, generating roughly $30,500 in tax-free investment earnings. At their income level, their California marginal rate is 6%, and federally their long-term capital gains rate is 15%. The 529 shelters those earnings from annual dividend taxes and eventual capital gains, saving the family an estimated $5,000–$7,000 in combined federal and state taxes over the 14-year period.

Seventy percent of UC's California undergrads receive grants and scholarships averaging about $20,000, and more than half of California undergrads from households earning under $100,000 pay zero tuition at UC. With that level of grant support, Tomás's 529 savings could cover much of his remaining room, board, and personal expenses—potentially allowing him to graduate debt-free on a middle-income family's monthly savings rate.

Total estimated federal + state tax savings: ~$5,000–$7,000

Family #3: Grandpa Seun—Oakland, California

Seun Adeyemi is a retired contractor in Oakland with retirement income of $95,000 per year from a combination of pension, Social Security, and investment income. He has two grandchildren, ages three and six, whose parents live in Texas. He decides to open two accounts—one Utah my529 for each grandchild—and contribute $300 per month total ($1,800/year per child).

Why Utah's my529 in Utah rather than ScholarShare 529 in California? Because California offers no state deduction for any plan, Seun gives nothing up by shopping nationally. And because Utah's my529 holds a Morningstar Gold rating, features ultra-low cost Vanguard and Dimensional Fund portfolios, and has no minimum contribution, Seun can put every dollar to work from day one.

After 15 years for the younger grandchild, each account holds $27,000 in contributions and has grown to approximately $47,500 — generating $40,900 in combined investment earnings across both accounts, shielded from annual dividend taxes and capital gains. At Seun's income level, his California marginal rate is 9.3% and his federal long-term capital gains rate is 15%. The combined federal and state tax protection generates estimated savings of $8,000–$10,000 across both accounts.

And Seun's grandchildren? They're in Texas, which has no state income tax—so they won't owe any state tax on qualified withdrawals either. The 529 machine runs cleanly on both ends.

Total estimated federal + state tax savings: ~$8,000–$10,000

The Bottom Line—California 529 Policy

California's 529 story is: frustrating state-level policy, excellent federal 529 opportunity.

The no-deduction rule stings, especially at the income levels common in California's major metros. SB 529—which would have changed that—failed in early 2026, and there's no immediate legislative path to a deduction. The Roth IRA rollover penalty adds another wrinkle that requires thoughtful planning.

But none of that changes what a 529 plan delivers for California families: tax-free growth, tax-free withdrawals for qualified education expenses, estate planning advantages, and gift tax benefits. California's own state income tax treats capital gains as ordinary income at rates up to 13.3%—which makes tax-sheltered compounding arguably more valuable in California than in lower-tax states, not less. The 529 sidesteps that drag entirely.

And because no California deduction is on the table, you have full freedom to pick the best plan available. Hadley's Find My 529 tool exists for this exact purpose—to help you cut through 50 state plans and find the one that fits your situation, without the false premise that you have to use the plan next door.

Start. Contribute what you can. Let it grow.

//

Questions? Contact us at AskHadley@gohadley.com. We're always open to feedback, suggestions, or otherwise!

This article is provided for informational and educational purposes only and does not constitute investment, legal, tax, or accounting advice. Nothing herein should be construed as a recommendation or solicitation to buy, sell, or hold any security or to adopt any particular investment strategy or vehicle. The views expressed are those of the author as of the date of publication and are subject to change without notice. Any data, figures, or statistics are believed to be reliable as of the publication date but may become outdated. Hadley undertakes no obligation to update such information. Charts, graphs, hypothetical examples, and other visual materials are provided for illustrative purposes only and do not represent actual account performance. Past performance is not indicative of future results. All investments involve risk, including the possible loss of principal. Strategies discussed may not be suitable for all investors, and readers should consult their own professional advisers before making investment decisions. References to third-party websites or content are provided for convenience only. Hadley does not control or endorse, and is not responsible for, the accuracy or content of third-party materials. Advisory services are offered only pursuant to a written agreement and only in jurisdictions where Hadley is properly registered or exempt from registration. Additional information about Hadley is available in its Form ADV, which can be obtained upon request or via the SEC’s Investment Adviser Public Disclosure website: IAPD - Investment Adviser Public Disclosure - Homepage.