Guide to 529 Plans

What is a 529 plan?

A 529 plan is a state-sponsored, tax-advantaged savings account designed for education expenses. You put after-tax money in, the investments grow tax-free, and qualified withdrawals — for tuition, fees, books, room and board, and a few newer categories — come out tax-free.

Two flavors exist:

• Education savings plans (the common kind) — your contributions are invested in a menu of mutual funds, similar to a 401(k). Account value moves with the market.
• Prepaid tuition plans — you pre-pay tomorrow’s tuition at today’s rates. Less common, more restrictive, and several state plans have been wound down.

This guide is about the savings plan version.

Why this guide is here

The audience for this site skews young-adult — most readers are the beneficiary of a 529, not the owner. If your parents or grandparents opened a 529 for you, this guide is what to do with it now. If you’re starting one for your own kids, the basics are below too.

How it works for the owner

Anyone can open a 529 — parent, grandparent, aunt, godparent, the future student themselves. The owner controls the account: investment choices, withdrawals, and (in most cases) who the beneficiary is.

• Contributions are after-tax federally. Many states give a state income tax deduction for contributions to that state’s plan.
• Growth is tax-free if used for qualified education expenses.
• Anyone can contribute, not just the owner. Grandparents, family friends, aunts — they can all add to the same account.

You don’t have to use your own state’s plan. Pick the lowest-cost plan with good investment options, unless your state offers a meaningful tax deduction tied to using the in-state plan.

2026 contribution limits

There’s no annual federal contribution cap on 529s — only the gift-tax framework and the state-set lifetime aggregate.

Superfunding lets you make five years of gift-exclusion contributions in one year (treated as if spread over 5 years for gift-tax purposes). It’s most often used by grandparents who want to front-load a 529 and let the runway compound.

Qualified expenses

Most of these are obvious; a few are newer additions worth knowing:

• Tuition and fees at colleges, universities, and registered apprenticeships.
• Books, supplies, required equipment including computers (when used primarily for school).
• Room and board — capped at the school’s published cost-of-attendance figure for that category.
• K–12 tuition at public, private, or religious schools — up to $20,000 per beneficiary per year starting in 2026 (raised from $10,000 by the One Big Beautiful Bill Act).
• Student loan repayment — up to $10,000 lifetime per beneficiary, plus another $10,000 per sibling.

Not qualified: transportation, health insurance, application fees, extracurricular activities. Use 529 dollars for those and you’ll owe income tax + a 10% penalty on the earnings portion of the withdrawal.

The SECURE 2.0 Roth IRA rollover (the big one)

Starting in 2024, leftover 529 funds can be rolled into the beneficiary’s Roth IRA under specific conditions. This is the rule that quietly transformed the 529 from “use it or pay penalties” into “education savings with a retirement-account exit ramp.”

The rules:

1. The 529 account must have been open at least 15 years.
2. Rollovers can only come from contributions (and their earnings) that have been in the account at least 5 years.
3. The Roth IRA must belong to the same person who is the 529 beneficiary.
4. Annual rollover amounts count against that year’s regular IRA contribution limit ($7,500 in 2026 for under-50s) — and can’t exceed it.
5. Lifetime cap of $35,000 in total rollovers per beneficiary.

So a 529 with $40,000 left after college can move $7,500/yr into the beneficiary’s Roth IRA — emptying $35,000 of it over roughly five years (assuming the beneficiary doesn’t otherwise contribute to a Roth that year).

What to do if you’re the leftover-529 beneficiary

You graduated. You used some of the 529. There’s a balance left. Now what?

1. Confirm the 15-year rule. When was the 529 opened? If it’s been open ≥15 years and the contributions you’d be rolling are ≥5 years old, you can use the Roth rollover.
2. Coordinate with the owner. Your parents (usually) are the account owner. They have to initiate the rollover.
3. Check your earned income. You can only roll over up to the lower of (a) your earned income for the year and (b) the regular IRA limit ($7,500 in 2026). No earned income, no rollover that year.
4. Plan the runway. $35,000 lifetime max means roughly five years at full IRA limits. Start early — the rollover years coincide with when you’re in your lowest tax brackets and can’t usually afford to max a Roth on your own.
5. What’s left after the lifetime cap? The owner can change the beneficiary to a sibling, future child, niece/nephew, or even themselves. 529 funds can sit indefinitely waiting for the next person in the family to use them.

Other ways to use leftover 529 money

If a Roth rollover isn’t an option (or there’s still a balance after the $35K cap), other paths:

• Change the beneficiary to a sibling, cousin, or child. The IRS allows beneficiary changes within the family tree without tax consequence.
• Fund graduate school — same plan, same tax treatment.
• Pay off student loans — up to $10,000 lifetime per beneficiary, plus $10,000 per sibling.
• Hold for a future grandchild. A 529 can sit and compound for decades. It outlives the original beneficiary.
• Last resort: take a non-qualified withdrawal. You’d owe income tax + a 10% penalty on the earnings portion (not contributions). Often still better than letting it sit forever, depending on the math.

What to do if you’re starting one

For new parents (or anyone funding one for a kid):

1. Pick a low-cost plan. Utah, New York, California, and Nevada plans are commonly recommended for low expense ratios and broad fund choice. Use your own state’s plan if it offers a meaningful state income tax deduction.
2. Use age-based portfolios. Most plans offer one — they automatically shift from stocks to bonds as the beneficiary approaches college age. Set it and forget it.
3. Don’t over-fund. Aim for somewhere around the cost of in-state public tuition. The Roth rollover gives you a $35,000 safety valve for over-funding, but $200K leftover isn’t recoverable through that mechanism.
4. Encourage relatives to contribute. Most plans have a gifting portal that family can use directly — birthdays, holidays, milestones. It compounds for decades.

Where this fits in the order of operations

In our Money Order of Operations, saving for kids’ college is Step 7 — after your own retirement is on a 15% track. The order matters: you can borrow for college; you cannot borrow for retirement.

If you’re the young-adult beneficiary of an existing 529, this guide is mostly about the SECURE 2.0 Roth rollover — see Step 5 (max your Roth IRA) for where that fits.

Common mistakes

• Funding kids’ 529s before your own retirement is on track. Scholarships, grants, in-state schools, and loans all exist for college. None of them exist for retirement.
• Using your own state’s plan when it doesn’t offer a tax deduction. No deduction = no reason to favor in-state. Pick the lowest-cost plan available.
• Over-funding without a plan B. Aim near in-state public tuition; use the Roth rollover as the safety valve for over-shooting.
• Forgetting the K-12 expansion. If private K-12 is in your family’s plan, the 529 now covers up to $20,000 per child per year of those costs.
• Missing the 15-year clock. If a 529 was opened recently and you might want the Roth rollover, every year matters. Don’t churn the account between providers — that may restart the clock.

Key takeaways

• 529 plans are state-sponsored, tax-advantaged accounts for education expenses.
• Anyone can contribute. Most states offer a state income tax deduction for in-state plan contributions.
• Qualified expenses cover tuition, fees, books, room and board, K–12 (up to $20,000/yr in 2026), apprenticeships, and student loan repayment.
• The SECURE 2.0 Roth rollover turns leftover 529 money into the beneficiary’s Roth IRA — up to $35,000 lifetime, with 15- and 5-year rules.
• Save for your own retirement before funding a 529 for someone else.