529 Plans Explained: Contribution Limits, Tax Breaks, and Qualified Expenses

A 529 plan is a tax-advantaged savings account, sponsored by a state or state agency, designed to help families pay for education. The name comes from Section 529 of the Internal Revenue Code. Contributions are made with after-tax dollars, but investment growth inside the account is not taxed federally, and withdrawals are tax-free at the federal level when used for qualified education expenses, according to the IRS and the SEC's Office of Investor Education and Advocacy.

Two Main Types of 529 Plans

Most families use education savings plans, which work like a brokerage or retirement account: you contribute money, choose from a menu of investment portfolios (often age-based funds that shift toward conservative holdings as college approaches), and the account value fluctuates with the market. A smaller number of states offer prepaid tuition plans, which let you lock in future tuition at current rates at participating in-state public colleges. Prepaid plans are less common and typically have residency requirements or enrollment windows.

Contribution Limits and Gift-Tax Rules

There is no federal dollar limit on annual 529 contributions, but each state sets an aggregate account maximum, often ranging from roughly $235,000 to more than $550,000 depending on the state, intended to cover the cost of an expensive education. The more important limit for most contributors is the federal gift-tax annual exclusion. For 2025, an individual can give up to $19,000 per beneficiary ($38,000 for a married couple splitting gifts) without using any of their lifetime gift and estate tax exemption or filing a gift tax return, per IRS guidance.

529 plans also offer a unique break: the five-year election, sometimes called superfunding. A contributor can make a lump-sum contribution of up to five times the annual exclusion amount and elect to treat it as if it were spread evenly over five years for gift-tax purposes. That means a single donor could contribute $95,000 in one year (five times $19,000) to one beneficiary's account without triggering gift tax, as long as no further gifts are made to that beneficiary during the five-year period. This requires filing IRS Form 709.

Tax Benefits at the State Level

Beyond the federal tax-free growth, more than 30 states offer a state income tax deduction or credit for contributions to that state's own 529 plan. Rules vary widely: some states cap the deduction per year, some allow it only for in-state plans, and a handful of states offer tax parity, meaning residents get a deduction regardless of which state's plan they use. A few states have no personal income tax and therefore offer no such deduction. Because state tax treatment differs so much, it is worth checking your own state's 529 plan page or department of revenue before assuming a deduction applies.

What Counts as a Qualified Expense

• Tuition and mandatory fees at eligible colleges, universities, and vocational schools
• Books, supplies, and equipment required for enrollment
• Room and board, up to limits tied to the school's cost of attendance, for students enrolled at least half-time
• Computers, software, and internet access used primarily by the student
• Up to $10,000 per year, per student, in tuition for K-12 public, private, or religious schools
• Certain registered apprenticeship program expenses
• Up to $10,000 (lifetime, per borrower) toward qualified student loan repayment, including loans for siblings of the beneficiary

What Happens If You Don't Use the Money

If a withdrawal is used for something other than a qualified expense, the earnings portion of that withdrawal is subject to ordinary federal income tax plus a 10% penalty. The contribution portion is not taxed again, since it was made with after-tax dollars. There are some exceptions to the penalty, such as when the beneficiary receives a tax-free scholarship, attends a U.S. military academy, dies, or becomes disabled, in which case the earnings may still be taxed but the 10% penalty is typically waived, per IRS Publication 970.

Account owners also have flexibility to change the beneficiary to another qualifying family member without tax consequences, which is useful if, for example, one child does not attend a traditional four-year program but a sibling will.

The 529-to-Roth IRA Rollover Option

The SECURE 2.0 Act created a narrow option, effective for 2024 and beyond, allowing unused 529 funds to be rolled into a Roth IRA for the same beneficiary. Key restrictions include a $35,000 lifetime cap per beneficiary, a requirement that the 529 account must have been open for at least 15 years, and annual rollover amounts that are subject to the normal annual Roth IRA contribution limit. Contributions and earnings from the preceding five years are generally not eligible to be rolled over. This provision addresses a long-standing worry among parents that overfunding a 529 could become a tax trap.

Financial Aid Considerations

On the Free Application for Federal Student Aid (FAFSA), a 529 account owned by a parent is generally treated as a parental asset, which has a relatively small impact on aid eligibility compared with assets held in the student's own name. Distributions from a grandparent-owned 529 plan were historically treated differently, but recent changes to the FAFSA formula have reduced that concern; families should confirm current treatment directly with the Department of Education's studentaid.gov resources, since federal aid rules are periodically updated.