How does a 529 plan work?
Last updated August 2026
Short answer
The old objection to 529 plans was inflexibility. Successive changes have removed most of it, and the account now has more exits than it used to.
The structure
An owner opens the account and names a beneficiary. The owner keeps control, including the right to change the beneficiary or take the money back.
Investments are chosen from the plan's menu, typically age-based portfolios that grow more conservative as the beneficiary approaches college.
Nothing is taxed inside the account, and qualified distributions are not taxable to the beneficiary either.
What qualifies
At postsecondary level: tuition, fees, books, supplies and required equipment at institutions eligible for federal student aid, plus room and board within published limits.
Beyond that: registered apprenticeship program costs, certain postsecondary credentialing expenses, and student loan repayment up to $10,000 lifetime for the beneficiary and the same for a sibling.
At K-12 level: tuition, curriculum and instructional materials, outside tutoring, standardised test and admissions exam fees, dual enrolment fees, and educational therapies for students with disabilities, capped at $20,000 per year per beneficiary across all their plans.
Contributions and the gift tax
There is no federal annual contribution limit, only the requirement that contributions not exceed what is needed for the beneficiary's qualified expenses, and the aggregate ceiling each state plan sets.
What actually binds most families is the gift tax annual exclusion, $19,000 per recipient in 2026.
A five-year election allows front-loading five years of exclusions at once, so $95,000 from one person or $190,000 from a couple can go in for one beneficiary, reported on Form 709.
Try it in Walnut
Walnut connects to your brokerage accounts and analyses what you hold. A 529 sits with its state plan administrator rather than at a broker, so it is generally tracked separately.
If the money is not needed
Change the beneficiary to another qualifying family member, including a sibling, cousin, parent or eventually a grandchild.
Roll up to $35,000 lifetime into the beneficiary's Roth IRA, subject to conditions covered on the dedicated page.
Or take a non-qualified withdrawal, where only the earnings are taxed, plus a 10% additional tax on that portion. Your original contributions come back untaxed.
Choosing a plan
Start with your own state, because a state income tax deduction or credit is an immediate and certain return that fund fees rarely outweigh.
If your state offers no benefit, compare plans on cost and investment menu, since any state's plan can pay for a school anywhere.
Keep ownership with a parent rather than the student, which is treated more favourably in federal financial aid calculations.
What it holds
Plans offer a menu rather than open investment choice, typically age-based portfolios that shift from equities toward bonds as the beneficiary approaches college.
Static options exist too, for owners who prefer to set the allocation themselves rather than follow a glide path.
Costs vary meaningfully between state plans for what is effectively the same underlying index exposure, which is worth checking when no state deduction is at stake.
Sources
Qualified expenses, the $20,000 K-12 limit, apprenticeship and loan repayment rules are from the IRS at Topic no. 313, Qualified tuition programs, with further detail in Publication 970. The 2026 gift tax annual exclusion is from Rev. Proc. 2025-32. Walnut is informational and is not an investment adviser. This guide is educational and not personalized tax advice.
FAQ
How does a 529 plan work?
+
You contribute after-tax money to a state-sponsored account for a named beneficiary. Earnings accumulate free of federal tax, and distributions are not taxable when used for qualified education expenses. Contributions are not federally deductible, though many states offer their own deduction or credit.
What counts as a qualified expense?
+
Tuition, fees, books, supplies and equipment required at an eligible postsecondary institution, plus room and board within limits. It also covers registered apprenticeship costs, certain credentialing expenses, and up to $10,000 lifetime per individual in student loan repayment.
Can I use it for K-12?
+
Yes, and the allowance has grown. Qualified expenses at elementary and secondary schools now include tuition, curriculum materials, books, outside tutoring, standardised test and AP fees, dual enrolment fees and certain educational therapies, limited to $20,000 per year per beneficiary from all their plans.
What if my child does not go to college?
+
Change the beneficiary to another family member, leave it invested for a future grandchild, roll up to $35,000 lifetime into the beneficiary's Roth IRA subject to conditions, or withdraw it and pay tax plus a 10% additional tax on the earnings only.
How much can I contribute?
+
There is no federal annual limit. Contributions cannot exceed what is necessary to provide for the beneficiary's qualified education expenses, and each state plan sets its own aggregate ceiling. The practical constraint most families hit first is the gift tax annual exclusion, $19,000 per recipient in 2026.
Does a 529 hurt financial aid?
+
A parent-owned 529 is treated as a parental asset, which is assessed far more lightly than a student asset in federal aid calculations. That is a meaningful reason to keep ownership with a parent rather than in the student's name.
Do I have to use my own state's plan?
+
No. Any state's plan can be used for a school in any state. The reason to consider your own is the state tax deduction or credit, where one exists, which is often worth more than a small difference in fund costs.