A 529 plan is a tax-advantaged savings account designed for education expenses. Money you contribute grows tax-free, and withdrawals for qualified education expenses are also tax-free. The federal tax benefit is entirely on the growth — contributions are made with after-tax dollars, like a Roth account.
Most states add a second benefit: a state income tax deduction or credit on contributions, which effectively makes the first dollars you put in even cheaper.
Here’s how the accounts work, what they cover, and the situations where they make less sense.
The basic structure
Tax treatment:
- Contributions: No federal deduction, but many states offer a deduction or credit
- Growth: Tax-free inside the account
- Withdrawals for qualified expenses: Tax-free
- Withdrawals for non-qualified expenses: Income tax + 10% penalty on the earnings portion
Who opens it: A parent, grandparent, or other adult opens the account and names a beneficiary (typically the child). The account owner retains control — the beneficiary doesn’t have authority over the account.
Who can contribute: Anyone. Grandparents, aunts and uncles, family friends. Contribution limits are high (up to $18,000 per person per year without gift tax implications in 2026, or $90,000 lump sum using 5-year gift tax averaging).
Investment options: 529 plans are offered by states and invest in a menu of mutual funds or ETFs, similar to a 401(k). You pick the account’s investments from what the plan offers. Age-based options (automatically shifting to more conservative investments as the child approaches college age) are common and often the right default.
State tax deductions: where the extra value is
34 states and Washington D.C. offer a state income tax deduction or credit for 529 contributions. In many cases, the deduction applies to contributions to any state’s plan. In others, it only applies to your own state’s plan.
Example: Illinois offers a deduction of up to $10,000/year ($20,000 married filing jointly) on contributions to any Illinois 529 plan. If you’re in the 4.95% Illinois income tax bracket, a $10,000 contribution saves you $495 in state taxes immediately — a guaranteed 4.95% return on the first $10,000 before the money even invests.
If your state offers a deduction: contribute at least enough to maximize it each year. This is essentially free money.
To find your state’s 529 tax benefit: savingforcollege.com maintains a comprehensive state comparison.
What counts as a qualified expense
Qualified (tax-free withdrawal):
- Tuition and fees at eligible colleges, universities, and vocational schools
- Room and board (up to the school’s published cost of attendance)
- Books, supplies, and required equipment
- Computer and internet access (if used primarily for school)
- K-12 tuition: up to $10,000/year per student (post-2017 law)
- Apprenticeship programs registered with the Department of Labor
- Student loan repayment: up to $10,000 lifetime per beneficiary (post-2019 law)
Not qualified (tax + 10% penalty on earnings):
- Transportation, travel to school
- Health insurance
- Sports or extracurricular fees beyond what the school charges as tuition
- Non-school computer purchases
- Room and board above the school’s Cost of Attendance figure
What happens if your child doesn’t go to college
This is the main risk people cite with 529s. The options:
Change the beneficiary: You can transfer the account to another family member tax-free — a sibling, cousin, parent, spouse. The definition of “family member” is broad. If one child doesn’t need the funds, use it for another.
Use for K-12: Up to $10,000/year can be withdrawn tax-free for private K-12 tuition.
SECURE 2.0 Act — Roth IRA rollover (2024+): Starting in 2024, unused 529 funds can be rolled into a Roth IRA for the beneficiary, subject to annual Roth contribution limits ($7,000/year in 2026) and a $35,000 lifetime maximum per beneficiary. The 529 must be at least 15 years old. This significantly reduces the “stuck” risk — if college funds aren’t needed, they become retirement funds.
Non-qualified withdrawal: You get the principal back tax-free. The earnings portion is subject to income tax plus the 10% penalty. If the account grew from $30,000 to $50,000, and you withdraw everything non-qualified, the $20,000 in earnings faces tax and penalty. The $30,000 principal is yours penalty-free.
529 vs. other college savings options
Coverdell Education Savings Account (ESA): Also tax-free for qualified education expenses. Lower contribution limit ($2,000/year) and income limits apply. More investment flexibility than most 529s. Useful as a supplement for K-12 expenses. Generally used alongside a 529, not instead of it.
UGMA/UTMA custodial accounts: Not education-specific. No tax benefit. Money becomes the child’s at majority — they can spend it on anything. Counts more heavily against financial aid. Generally not the right vehicle for college savings.
Taxable brokerage account: Flexible, no withdrawal penalty for non-education use. No tax benefit. Less efficient than a 529 for money you intend to use for education. But if you’re uncertain about college, this preserves optionality.
I Bonds: Can be redeemed tax-free for qualified education expenses (with income limits). Low contribution limits ($10,000/year). Useful as a small part of the college savings mix.
529 and financial aid
529 accounts are treated as parent assets on the FAFSA when owned by a parent — reducing eligibility by up to 5.64% of the account value per year. This is more favorable than student assets (which reduce aid by 20%).
Grandparent-owned 529s: Starting with the 2024-2025 FAFSA (under the FAFSA Simplification Act), grandparent-owned 529 distributions no longer count as student income. The previous workaround (waiting until junior year to use grandparent 529 funds) is no longer necessary.
How much to save
A rough benchmark: aim to save 1/3 of expected college costs, plan for 1/3 from income during college years, and leave 1/3 to financial aid, scholarships, or loans. Saving the full projected cost often over-funds the account.
Current 4-year public university cost (in-state): approximately $110,000–$130,000 total (tuition, room, board). Private university: $220,000–$320,000+. These figures will be higher in 10–18 years with tuition inflation.
Many families start with a simple monthly contribution ($100–$300) in an age-based portfolio and adjust as the child gets closer to college.
FAQ
Can I open a 529 for myself?
Yes. You can open a 529 and name yourself as the beneficiary — useful if you’re considering graduate school or professional certifications. The same tax benefits apply.
What if my child gets a scholarship?
You can withdraw an amount equal to the scholarship tax-free (only the earnings are still subject to income tax; the 10% penalty is waived for scholarship recipients). The rest stays in the account for other qualified expenses or can be rolled to a Roth via SECURE 2.0.
Which state’s 529 plan should I use?
If your state offers a tax deduction for any state’s plan: pick the best-performing, lowest-cost plan. Utah’s my529 and Nevada’s Vanguard plan are consistently well-regarded for low costs and investment options. If your state only deducts in-state contributions: compare whether the in-state deduction outweighs any cost disadvantage.
Is it too late to open a 529 if my child is 15?
No, but the shorter time horizon limits growth potential. The state tax deduction still applies, and even 3 years of tax-free growth is better than none. You can also front-load with 5-year gift tax averaging.