By Harry Prabandham · Updated September 28, 2026
Tax Planning
529 Plan Tax Strategies: Superfunding, Roth Rollovers, and K-12 Rules
529 earnings are federally tax-free for qualified education costs. In 2026, K-12 withdrawals can reach $20,000 a year; California differs.
529 Plan Tax Strategies: Superfunding, Roth Rollovers, and K-12 Rules
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What are the tax benefits of a 529 plan?
- Earnings grow tax-deferred and are federally tax-free when used for qualified education expenses.
- Contributions aren't federally deductible; many states offer a deduction or credit, but California offers none.
- Contributions are completed gifts that leave the donor's estate, while the account owner keeps control.
- Non-qualified withdrawals owe income tax on earnings plus a 10% additional tax, with some exceptions.
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Full Guide
What are the tax benefits of a 529 plan?
- Earnings grow tax-deferred and are federally tax-free when used for qualified education expenses.
- Contributions aren't federally deductible; many states offer a deduction or credit, but California offers none.
- Contributions are completed gifts that leave the donor's estate, while the account owner keeps control.
- Non-qualified withdrawals owe income tax on earnings plus a 10% additional tax, with some exceptions.
How does 529 superfunding work?
- A donor can elect to spread one contribution over five years for gift tax purposes, up to $95,000 per beneficiary in 2026.
- A married couple splitting gifts can front-load up to $190,000 per beneficiary in 2026.
- The election is made on Form 709, and other annual-exclusion gifts to that beneficiary during the five years draw on the same room.
- If the donor dies within the five years, the portion allocated to later years returns to the estate.
Which expenses qualify for tax-free withdrawals?
- College tuition, fees, books, and required supplies, plus room and board for at least half-time students up to the school's allowance.
- K-12 tuition and, since July 2025, certain other K-12 costs, up to $20,000 per beneficiary per year starting in 2026.
- Registered apprenticeship costs and up to $10,000 of lifetime student loan payments per borrower.
- Computers, software, and internet access used primarily by the student while enrolled.
Can unused 529 money go to a Roth IRA?
- Since 2024, up to $35,000 per beneficiary, over a lifetime, can move from a 529 to that beneficiary's Roth IRA.
- The 529 must have been open at least 15 years, and contributions from the last five years and their earnings can't move.
- Each year's rollover counts against the Roth limit, $7,500 in 2026, and the beneficiary needs at least that much earned income.
- California doesn't conform, so the rollover is state-taxable plus a 2.5% additional state tax.
How does California treat 529 withdrawals?
- California follows federal treatment for college costs, apprenticeships, and student loan payments.
- It does not conform for K-12 or postsecondary credentialing expenses, so those earnings are state-taxable plus a 2.5% additional tax.
- With no California deduction, plan choice for residents often comes down to fees and investment options.
- Other states may recapture past deductions if money is rolled to another state's plan or withdrawn for non-qualified uses.
How do 529s interact with education credits and aid?
- The same expenses can't support both a tax-free 529 withdrawal and the American Opportunity Tax Credit.
- The AOTC is worth up to $2,500 per student a year, based on the first $4,000 of qualified expenses, for up to four years.
- Parent-owned 529s count as parent assets on the FAFSA, and grandparent-owned 529s aren't reported.
- Changing the beneficiary to another family member is tax-free for income tax purposes.
Key takeaways
- 529 growth is federally tax-free for qualified costs, and 2026 K-12 withdrawals can reach $20,000.
- Superfunding allows $95,000 per donor per beneficiary in 2026 through a five-year election.
- The Roth rollover has a $35,000 lifetime cap and a 15-year account age requirement.
- California taxes K-12 and Roth-rollover withdrawals; confirm state treatment with your CPA.
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