The 529 Rollover Washington Made Tax-Free — and California Didn't
The last tuition bill cleared a while ago. The 529 you opened when your daughter was in elementary school still has $30,000 sitting in it — she earned a scholarship, picked a less expensive school, or simply didn't need it all. And somewhere along the way you heard the good news: since 2024, federal law lets you roll leftover 529 money into a Roth IRA for your child, tax-free and penalty-free. Decades of tax-free growth instead of a stranded account. It sounds like that rare planning move with no catch.
If you live in California, there's a catch. This article covers how the 529-to-Roth rollover actually works — the federal fine print most people skim past, and the state tax treatment that makes California the only place in the country where "tax-free" isn't quite true.
What Is the 529-to-Roth Rollover?
A federal law change that took effect in 2024 allows up to $35,000 — a lifetime total, per beneficiary — to move from a 529 plan into a Roth IRA owned by the 529's beneficiary. That's your child or grandchild, not you. If every condition is met, the transfer is free of federal income tax and penalty, and the money begins a new life as retirement savings. The conditions, however, are where families get tripped up.
The Ways It Goes Wrong
1. You assume California follows the federal rules. It doesn't. California treats the rollover as a nonqualified withdrawal: the earnings portion of every dollar you move is included in your California taxable income, plus an additional 2.5% state tax on top. California is the only state in the country that does this. Your federal return shows nothing. Your California return shows a real bill — and because the federal paperwork looks clean, many families don't discover the state side until tax season. This isn't an oversight Sacramento hasn't noticed, either. Lawmakers have introduced conformity bills three times, most recently in the current session. None has passed.
2. You treat it as one transaction. The $35,000 cap can't move at once. Each year's rollover is limited to that year's Roth IRA contribution limit — $7,500 in 2026 — and it counts against your child's own contribution room for the year. Moving the full amount takes roughly five years of installments, each one a separate decision landing in a separate tax year, and each one crowding out a direct Roth contribution your child might have made anyway.
3. Your child has to qualify — not you. The receiving Roth IRA belongs to the beneficiary, and the beneficiary needs earned income at least equal to the amount rolled over that year. A gap year, graduate school, or a stretch between jobs means a skipped installment. One notable exception in your favor: unlike regular Roth contributions, there is no income ceiling — a child earning too much to contribute to a Roth directly can still receive the rollover.
4. You forget there are two clocks. The 529 must have been open for at least fifteen years, and any contributions made within the last five years — along with the earnings on them — are ineligible to move. That generous "top-off" contribution you made during senior year quietly shrinks what can transfer, and it keeps shrinking the eligible pool for five full years.
5. You take the money out first. The transfer must move directly from the 529 plan to the Roth IRA custodian. Withdraw the money yourself with plans to deposit it, and the entire favorable treatment disappears — the withdrawal becomes nonqualified, with federal income tax and a 10% penalty on the earnings.
What To Do
None of this means the rollover is a bad move for California families. Paying state tax on the earnings once, in exchange for decades of growth that is never taxed again anywhere, is a trade that often still works — but only when someone runs the numbers first. The real decisions are sequencing decisions: which tax years absorb the California income, how the installments coordinate with your child's own savings, and whether the pending legislation changes the timing math. Handled in isolation, this is five years of small surprises. Handled inside a coordinated plan — where the 529, the rollover calendar, and your broader tax picture are treated as one decision — it's a known cost with a known payoff. That's precisely the kind of multi-year tax sequencing the Tax Management Journey® exists to manage.
If you're a current CRA client, this is the kind of item that surfaces in your ongoing reviews before it surfaces on a tax return. If you're not yet working with us and there's a 529 with leftover money somewhere in your family's picture, our 20-Minute Due-Diligence Conversation is a straightforward place to find out whether the rollover fits — and what it would actually cost.
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