Can You Contribute to a 529 While in College? Limits and Tax Tips

Yes, you can keep contributing to a 529 plan while the beneficiary is in college. Federal law sets no age limit and no enrollment restriction on who can receive contributions, so parents, grandparents, and students themselves can fund an account through every semester of an undergraduate or graduate program.¹ The real work is timing your deposits, withdrawals, and education tax credits so nothing gets wasted.

No Age or Enrollment Limit

The Internal Revenue Code defines a qualified tuition program without ever mentioning an age cutoff for the beneficiary. A five-year-old and a thirty-five-year-old are treated identically. As long as a plan is open and the account balance sits below the state’s aggregate cap, anyone can deposit money on behalf of the beneficiary at any point, whether that person is a freshman, a doctoral candidate, or someone returning to school after years in the workforce.¹

The beneficiary can also be the account owner and contributor at the same time. A working graduate student, for instance, can deposit part of each paycheck into a 529 and withdraw from the same account to cover tuition and fees that semester. The tax benefit still applies to the earnings portion of those withdrawals, provided the money goes toward qualified expenses.²

How Much You Can Contribute in a Year

Every dollar deposited into a 529 counts as a completed gift from the contributor to the beneficiary. For 2026, the federal annual gift tax exclusion is $19,000 per donor per recipient. A married couple can each give $19,000 to the same student, for $38,000 in a single year, with no gift tax return required.³

A separate provision lets a donor “superfund” a 529 by contributing up to five years of the annual exclusion at once. For 2026, that is up to $95,000 from a single donor or $190,000 from a married couple electing gift-splitting. The donor files IRS Form 709 and elects to spread the gift ratably over five calendar years. Any additional gifts to the same beneficiary from the same donor during that window eat into the annual exclusion for each remaining year.¹

Superfunding is especially practical when a student is already enrolled. A grandparent who wants to cover the last two or three years of tuition can make a single lump-sum deposit and start taking qualified withdrawals right away. The catch: if the donor dies before the five-year period ends, the portion of the gift allocated to years after the date of death gets pulled back into the donor’s taxable estate.¹

Using the 529 to Capture a State Tax Deduction

Many states offer a deduction or credit on the contributor’s state income tax return for 529 deposits. Families already paying tuition can use what’s sometimes called a pass-through contribution: deposit money into the 529, claim the state deduction, then withdraw the same funds shortly afterward to pay a university bill.

The mechanics are simple. Say your state offers a deduction of up to $5,000 for 529 contributions. You deposit $5,000, take the deduction on your state return, then withdraw the funds to cover that semester’s tuition. The withdrawal is tax-free because it goes toward qualified expenses, and you pocket the state tax savings. Depending on state tax rates, this can shave a few hundred dollars off your bill each year for a few minutes of paperwork.

Before trying this, check whether your state imposes a minimum holding period. Some states require contributions to stay in the account for a set number of days before a withdrawal qualifies, specifically to prevent same-day cycling. Pulling the money too soon can let the state recapture the deduction. The safest approach is to make your contribution at least a month before you need to withdraw and to keep account statements and bank transfer confirmations documenting the deposit and withdrawal dates. Also confirm that the deduction applies to your home state’s plan, since most states limit the benefit that way.

Don’t Waste the American Opportunity Tax Credit

The IRS does not let you use the same tuition dollar for both a tax-free 529 withdrawal and an education tax credit like the American Opportunity Tax Credit (AOTC) or the Lifetime Learning Credit. If you claim the AOTC on $4,000 of tuition, that $4,000 cannot also be the basis for a tax-free 529 distribution. You must subtract any tax-free educational assistance, including 529 withdrawals, from qualified expenses before calculating the credit.⁴

For many families, the AOTC is worth more than the 529 tax break on the same dollars. The AOTC provides up to $2,500 per student per year, and 40% of it is refundable. A common approach is to pay the first $4,000 of tuition out of pocket or from non-529 savings to maximize the AOTC, then use 529 funds for remaining qualified expenses such as room and board, books, and equipment. Getting this split wrong is one of the most expensive mistakes families make with 529 withdrawals, and the IRS will catch it because the numbers on Form 1098-T and Form 1099-Q won’t reconcile.

Match Every Withdrawal to a Same-Year Expense

The IRS looks at the calendar year when deciding whether a 529 distribution is qualified. The expense and the withdrawal that pays for it should fall within the same tax year. This sounds obvious until you’re dealing with a spring semester that starts in January. If you withdraw money in December to pre-pay a January tuition bill, the withdrawal lands in one tax year while the school may record the expense in the next.

When those years don’t match, the 1099-Q from the plan and the 1098-T from the school will tell different stories to the IRS. That mismatch can cause the earnings portion of your withdrawal to be treated as taxable income, plus a 10% additional tax on those earnings.² The fix is straightforward: wait until you’re in the same calendar year as the expense before requesting the distribution. If tuition is due January 15, take the withdrawal in January, not December. Keep confirmation emails and bank records showing the date of both the withdrawal and the payment.

Families making ongoing contributions while the student is enrolled should build a rhythm around this. Contribute early in the year to capture any state tax deduction, withdraw later in the same year to pay fall or spring bills, and make sure every dollar out ties to a documented qualified expense in that same calendar year.

What Counts as a Qualified Expense

A withdrawal from a 529 is only tax-free if it pays for expenses the IRS recognizes as qualified. The list is broader than many families realize, but it has firm edges, and crossing them triggers income tax plus a 10% penalty on the earnings portion of the distribution.⁵

Tuition and fees billed by an eligible postsecondary institution for enrollment or attendance, covering both undergraduate and graduate programs at schools eligible for federal student aid.
Books, supplies, and equipment required for coursework. A textbook on the syllabus qualifies; a novel for leisure reading does not.
Room and board, but only if the student is enrolled at least half-time. On-campus housing uses the amount invoiced by the school. Off-campus living is capped at the school’s published cost-of-attendance allowance for room and board; rent and groceries above that figure are not qualified.¹
Computers, peripheral equipment, software, and internet service, if used primarily by the beneficiary during enrollment years. Software for games, sports, or hobbies does not count unless it is predominantly educational.⁵
Special needs services connected to enrollment.
Student loan repayment, up to $10,000 over the beneficiary’s lifetime, toward principal or interest on qualified education loans. The same $10,000 cap applies separately to each sibling of the beneficiary.⁵

Application fees for graduate or professional school are notably absent. The IRS defines qualified expenses in terms of enrollment or attendance at an eligible institution, and an application fee is paid before enrollment begins. Paying that fee from a 529 would likely trigger a non-qualified distribution.

Grandparent Contributions and the FAFSA

Starting with the 2024-2025 FAFSA cycle, the rules for how 529 plans affect need-based aid changed significantly. If the student is a dependent and required to report parent information, all 529 accounts for that student are reported as a parent asset regardless of who owns the account. Parent assets receive more favorable treatment in the Student Aid Index calculation than student assets.⁶

The biggest change affects grandparent-owned 529 plans. Under the old FAFSA, distributions from a grandparent’s 529 counted as untaxed student income, which could reduce aid eligibility by roughly half the distribution amount. That penalty is gone. Under the current FAFSA, distributions from non-parent-owned 529 plans are no longer reported as student income. Grandparent contributions during college are far more attractive than they used to be.

One caveat: private universities that use the CSS Profile may still ask about 529 distributions from all sources, including grandparent-owned accounts. The FAFSA improvement does not extend to the CSS Profile.

What to Do with Leftover Funds

The SECURE 2.0 Act allows beneficiaries to roll unused 529 funds directly into a Roth IRA in their own name for distributions after December 31, 2023. This is a useful escape valve if the student graduates with money still in the account, but the rules are tight.⁷

The 529 must have been open for the beneficiary for at least 15 years before any rollover.
Contributions made within the last five years, along with their earnings, are not eligible to be rolled over.
The amount rolled over in any year counts toward the beneficiary’s IRA contribution limit for that year. For 2026, that limit is $7,500 for individuals under 50.⁸
The lifetime maximum that can ever be rolled from a 529 into a Roth IRA for a single beneficiary is $35,000.

For families contributing while the student is in college, the 15-year rule is the one that usually bites. If the account was opened when the child was a toddler, you’ll clear that threshold easily. If it was opened during high school, the clock won’t run out until the beneficiary is well into their thirties. Planning around this means keeping the account open even after graduation rather than closing it out, and being cautious about how much you contribute in the final years, since fresh contributions and their earnings sit outside the rollover window for five years.

1
Office of the Law Revision Counsel. 26 USC 529 – Qualified Tuition Programs
2
Internal Revenue Service. 529 Plans: Questions and Answers
3
Internal Revenue Service. What’s New – Estate and Gift Tax
4
Internal Revenue Service. No Double Education Benefits Allowed
5
Internal Revenue Service. Publication 970 – Tax Benefits for Education
6
Federal Student Aid. 2026-27 FAFSA Form
7
Internal Revenue Service. Publication 590-A – Contributions to Individual Retirement Arrangements
8
Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026; IRA Limit Increases to $7,500