529 Plans: The Rules, and What Changed

A 529 plan is a tax-advantaged account, sponsored by a state, built specifically to save for education. The pitch is simple: money contributed grows without federal tax, and withdrawals are also free of federal tax as long as they pay for qualified education expenses. What trips people up is not the pitch, it is the mechanics underneath it: what counts as qualified, how much you can put in, what happens to money you do not use, and a genuinely new option that did not exist a few years ago.

This guide covers those mechanics. It does not restate the specific dollar contribution limits or gift-tax exclusion amounts, because those are set annually and vary by state plan rather than being a single national figure. Check the current numbers at Saving for College or the IRS gift tax FAQ before you plan a specific contribution around them.

How does the tax benefit actually work?

There are three separate tax events with a 529 account, and it helps to treat them separately rather than as one benefit.

Contributions are made with after-tax money at the federal level. There is no federal deduction for putting money in, unlike a traditional 401(k) or IRA. Many states, however, offer their own state income tax deduction or credit for contributions to that state's plan, and some allow it even if you contribute to a different state's plan. This state-level variation is large enough that it changes which plan is worth using, independent of investment performance.

Growth inside the account is not taxed as it happens. Dividends, interest and capital gains inside a 529 do not generate a tax bill each year the way they would in an ordinary brokerage account, which is the same shelter mechanism behind a 401(k) or IRA, just for a different purpose.

Withdrawals used for qualified education expenses are free of federal tax on the earnings portion, and free of state tax in the state that sponsors the plan in most cases. Withdrawals used for anything else are taxed on the earnings portion as ordinary income, plus a 10% penalty on that portion, which is the mechanism that gives the account its discipline.

What actually counts as a qualified expense?

This is the detail that generates the most support calls, because the definition is broader than "college tuition" but narrower than "anything school-related."

Qualified higher education expenses generally include:

• Tuition and mandatory fees at an eligible institution
• Books, supplies and equipment required for enrollment
• Room and board, but only up to the institution's published cost of attendance, and only if the student is enrolled at least half time
• Computers and related technology, if used primarily by the student while enrolled

Since 2018 the definition has also included up to a set amount per year of tuition at a K-through-12 public, private or religious school, a meaningful expansion beyond the original college-only design, and more recent legislation has expanded what counts further, including some apprenticeship program expenses and student loan repayment up to a lifetime cap. The specifics of these expanded categories, including the dollar caps, are worth checking directly at IRS guidance on qualified tuition programs rather than assumed, because this is one of the areas of 529 rules that has moved the most in recent years.

Room and board is the expense most often overclaimed. The cap is the institution's own published cost of attendance figure for a student living off campus, not whatever the family actually spends. A student sharing an apartment well under that published figure can spend up to the cap; a student in an expensive off-campus arrangement above the published figure cannot claim the excess.

What happens to money in the account if my child gets a scholarship?

This is one of the more reader-friendly rules in the whole system. If a beneficiary receives a tax-free scholarship, you can withdraw up to the scholarship amount from the 529 without the usual 10% penalty. The earnings portion of that withdrawal is still taxed as ordinary income, but the penalty is waived specifically for this situation, so a scholarship does not trap the family into either an unnecessary penalty or an unused account.

A similar penalty waiver applies to attendance at a US military academy, and to the death or permanent disability of the beneficiary.

What if my child does not go to college at all?

Three options exist, and none of them force you into the taxed-and-penalized outcome by default.

Change the beneficiary. A 529 account can be reassigned to another family member, defined broadly to include siblings, first cousins, and even the account owner, without any tax consequence. A family with one child who does not use the funds and a younger child who does can simply redirect the account.

Use it for a different qualifying purpose, including the K-12 tuition, apprenticeship, and student loan repayment categories described above, which broadens what "used for education" means well beyond a four-year degree.

Roll a portion into a Roth IRA for the beneficiary, under a provision added by federal legislation in recent years. This is genuinely new relative to how 529 plans worked for most of their history, and it is worth understanding on its own.

The Roth IRA rollover option, explained

Under a change enacted through the SECURE 2.0 Act, unused 529 funds can be rolled into a Roth IRA owned by the account's beneficiary, subject to several conditions:

• The 529 account must have been open for at least 15 years.
• Contributions made within the preceding five years, and their earnings, are not eligible to be rolled over.
• The rollover counts against the beneficiary's normal annual IRA contribution limit for the year, it is not an amount on top of it.
• There is a lifetime cap on how much can be rolled over this way, separate from the annual limit.

This option matters most for families who overfunded an account, either because a child received significant scholarships or chose a lower-cost path than the family planned for. Before this provision existed, that money had only the taxed-and-penalized route or the change-beneficiary route. Now a portion of it can become retirement savings for the same person instead, without the account ever having been "wasted." The 15-year holding requirement and the five-year lookback on recent contributions mean this is not a fast maneuver: a family cannot open an account today and roll it into a Roth next year.

How much can I contribute, and does the gift-tax rule matter?

Contribution limits are set by each state's plan, generally expressed as a lifetime maximum account balance across all 529 accounts for one beneficiary in that state, rather than an annual dollar cap. These lifetime limits vary meaningfully by state, so the ceiling in one plan is not the ceiling in another. Check the specific plan's current limit at Saving for College before assuming a figure from a different state's plan applies to yours.

Separate from the plan's own lifetime cap is the federal gift-tax treatment of a contribution. A 529 contribution is treated as a gift to the beneficiary for federal gift-tax purposes, which normally means large contributions could eat into your lifetime gift and estate tax exemption. 529 plans get a specific accommodation: a contributor can elect to treat a single large contribution as if it were spread evenly over five years for gift-tax purposes, allowing a much larger lump sum to be contributed at once while still fitting within the annual exclusion, averaged across those five years.

This is genuinely useful for grandparents or other relatives who want to front-load an account, for example right after a child is born, rather than contributing smaller amounts every year. The election is made on a gift tax return even if no gift tax is ultimately owed, which is a step people skip and then have to correct later. See the IRS gift tax FAQ for the mechanics of the five-year election and the current annual exclusion amount it is built from.

Does a 529 account hurt financial aid eligibility?

It has an effect, but a smaller one than most families assume, and the effect depends heavily on who owns the account.

Under current federal financial aid methodology, a 529 account owned by a parent, with the student as beneficiary, is treated as a parental asset, which is assessed at a much lower rate than a student's own asset when calculating expected family contribution. A 529 owned by a grandparent, historically the more punitive case because distributions counted as student income, is treated more favorably under recent changes to the federal aid formula, which no longer count grandparent-owned distributions as student income the way older rules did.

This is an area where the rules have changed materially in recent years, and a family relying on advice from even five years ago about which relative should own the account may be working from an outdated picture. It is worth confirming the current treatment against the institution's own financial aid office or current federal guidance before deciding who should be the account owner, particularly for a family expecting to qualify for need-based aid.

Putting it together

A 529 plan's value comes from three separate mechanisms working together: no annual tax on growth, no tax on qualified withdrawals, and enough flexibility, through beneficiary changes, expanded qualified expenses, and now the Roth IRA rollover, that money contributed early rarely ends up trapped. The dollar limits that bound all of this, contribution ceilings, the gift-tax exclusion, the Roth rollover cap, move on their own schedules and differ by state. Confirm the current figures at Saving for College or directly with your state's plan before you commit to a specific contribution size, and revisit the Child Tax Credit rules alongside this if you are planning a family's finances as a whole rather than one account at a time.