529 Plans for Grandchildren: How They Work, Tax Benefits, and When They're Worth It
One of the greatest gifts you can leave a grandchild isn't always an inheritance. Sometimes it's the opportunity to begin adulthood with fewer financial hurdles than the generations before them.
For many grandparents, that starts with education. And when it comes to setting money aside for that goal, a 529 plan is one of the most common vehicles grandparents, parents, and even other family members use to save for a child's future education.
This guide explains how it works, the tax benefits it offers, the potential drawbacks to keep in mind, and when it may (or may not) deserve a place in your retirement and legacy plan.
What Is a 529 Plan?
A 529 plan is a tax-advantaged investment account designed to help fund your grandchild's future education.
Investment earnings accrue on a tax-deferred basis, meaning you don't owe federal income tax on dividends, interest, or capital gains as they accumulate within the account.
When the money is eventually withdrawn for qualified education expenses, both your contributions and the accumulated earnings can be distributed free from federal income tax. In other words, more of your investment returns stay in the account and ultimately go toward your grandchild's education instead of taxes.
Better yet, depending on where you live, your state may also offer an income tax deduction or credit for contributions to a 529 plan. In some states, however, you'll need to contribute to that state's plan to qualify for the tax benefit.
Under Section 529 of the Internal Revenue Code, a 529 plan is formally referred to as a Qualified Tuition Program (QTP).
How a 529 Plan Works
Traditionally, if you wanted to help pay for your grandchild's education, you might simply set money aside in a savings account and hand it over when tuition comes due.
A 529 follows much the same basic idea, except your contributions are invested within a tax-advantaged account and earmarked for your grandchild's education.
Account Setup
The process starts when you open a 529 account and name your grandchild as the designated beneficiary. Even though the account is established for your grandchild's benefit, you remain the account owner, so you retain control over the assets and how they're eventually distributed.
Contributions and Investment Allocation
Next, you contribute money, either by making regular contributions over time or larger lump-sum contributions, subject to your state's 529 plan contribution limits and applicable federal gift tax rules.
You then choose how those contributions are invested from the options offered by the plan, which may include mutual funds, exchange-traded funds (ETFs), static portfolios, and age-based portfolios.
Once invested, any dividends, interest, and capital gains generated within the account accumulate on a tax-deferred basis. In other words, you don't have to pay federal income tax on those earnings each year while they remain inside the 529.
Withdrawals and Qualified Education Expenses
When the time comes, you can take distributions from the account to pay for your grandchild's qualified education expenses, which include:
Tuition and mandatory fees
Books, supplies, and required equipment
Computers, software, and internet access used primarily for education
Room and board (if the student is enrolled at least half-time)
Registered apprenticeship program expenses
Certain K-12 tuition expenses, subject to the applicable annual limit
Certain expenses for recognized postsecondary credential programs
Provided the withdrawals are used for these eligible expenses, both your original contributions and the investment earnings can be withdrawn free from federal income tax.
When Should Grandparents Open a 529 Plan?
Ideally, as early as possible, even as soon as your grandchild is born. The earlier you open a 529 plan and begin contributing, the more time your investments have to compound on a tax-deferred basis before those funds are needed for college.
Consider two grandparents who each make a one-time $10,000 contribution and earn a hypothetical average annual return of 6%.
If you invest when your grandchild is born, the account could grow to approximately $28,500 by the time they begin college at age 18. Make the same contribution when your grandchild turns 10, however, and it would have only eight years to compound, growing to roughly $15,900 by age 18.
That's a difference of about $12,600, even though both grandparents contributed exactly the same amount.
Starting early doesn't mean keeping the same investment strategy all the way through college. Many 529 plans offer age-based portfolios, which automatically become more conservative as your grandchild gets closer to college.
That gives your investments a longer runway for potential growth while gradually reducing market risk as the first tuition bill draws closer.
What If Your Grandchild Doesn't Go to College?
Plans change. Your grandchild may decide that a four-year college isn't for them, or they may receive a scholarship that covers much of the cost and, as such, need less money than originally set aside.
So, does that mean years of contributions and investment growth go to waste? No. An unused 529 balance doesn't automatically have to be forfeited or withdrawn.
Depending on your grandchild's circumstances, you may be able to:
Keep the money invested for graduate school or another eligible education program
Change the beneficiary to another qualifying family member
Roll eligible funds into a Roth IRA for your grandchild
You can also take a non-qualified withdrawal if you ultimately want to use the money for something else, although taxes and a possible penalty can apply to the earnings portion.
Benefits of 529 Plans for Grandparents
Investment Earnings Can Grow and Be Withdrawn Tax-Free
As your contributions generate dividends, interest, or capital gains within the account, you don't owe federal income tax on those earnings each year. That allows your returns to remain invested and continue compounding on a tax-deferred basis.
The second tax advantage arrives when your grandchild needs the money. Withdrawals used for qualified education expenses aren't subject to federal income tax, including the earnings attributable to those withdrawals.
Suppose, for example, that your total contributions eventually amount to $60,000 and investment growth brings the account balance to $90,000. If the entire balance is properly used for qualified education expenses, the $30,000 of accumulated earnings can come out without federal income tax.
Possible State Tax Deductions or Tax Credits
Beyond the federal tax benefits, many states also reward residents who contribute to a 529 plan. More than 30 states currently offer either a state income tax deduction or a state income tax credit, although the value of that benefit depends entirely on where you live.
The rules vary considerably from state to state. For example, Indiana offers eligible taxpayers a 20% state income tax credit on contributions to an Indiana529 account, up to the annual maximum allowed by state law.
Another case in point is Minnesota. The state allows qualifying taxpayers to claim either a state income tax credit or a subtraction from income, depending on their circumstances.
Estate Planning and Gifting Benefits
One of the biggest estate planning advantages of a 529 plan is that contributions are generally treated as completed gifts for federal gift tax purposes.
That means the money is removed from your taxable estate while you continue to retain control of the account as its owner, including how it's invested, when distributions are made, and, in many cases, even who ultimately benefits from it.
In 2026, the federal annual gift tax exclusion is $19,000 per recipient, per donor. That means you can contribute up to $19,000 to a grandchild's 529 plan during the year without using any of your lifetime federal gift and estate tax exemption (assuming you haven't made other gifts to that grandchild that use the same annual exclusion).
What if you've already decided you want to contribute much more than the annual exclusion allows? Maybe you've set aside enough savings to fund several years' worth of contributions at once rather than spreading them out over time.
This is where 529 plans receive special treatment through what's called five-year gift tax averaging, or "529 superfunding." Instead of making one annual exclusion gift each year, you can elect to treat a larger contribution as though it were made evenly over five years for federal gift tax purposes.
That creates a double benefit. Not only can you transfer a larger amount out of your taxable estate sooner, but the entire contribution also has the opportunity to begin compounding immediately rather than waiting years for later contributions to be invested.
Flexibility If Education Plans Change
"Education" funded through a 529 doesn't have to mean a traditional four-year undergraduate degree. Qualified 529 funds can cover eligible expenses at colleges, universities, vocational schools, and other qualifying postsecondary institutions.
Federal rules also permit certain K-12 tuition expenses, registered apprenticeship expenses, and other specified education costs.
If your grandchild later pursues graduate school, the account can remain available for eligible expenses there.
If another family member needs the money instead, you can generally change the designated beneficiary to an eligible family member without federal income tax consequences.
And since 2024, another exit route has been available: qualifying unused 529 funds can be transferred to a Roth IRA owned by your grandchild, allowing those education savings to continue growing for retirement on a tax-advantaged basis rather than being withdrawn and taxed.
This can effectively extend the long-term value of the account beyond education and into your grandchild’s future financial security.
Of course, this is subject to requirements that include a 15-year account-age rule, annual Roth IRA contribution limits, restrictions on recent 529 contributions, and a $35,000 lifetime rollover ceiling.
As for using the money outside of educational expenses (i.e. non-qualified withdrawals), you may do so, although the earnings portion can become taxable and may be subject to an additional federal tax penalty.
Better Treatment Under the New FAFSA Rules
For many years, grandparents had to think carefully about when to use a 529 plan.
Under the old FAFSA rules, a 529 plan owned by a grandparent wasn't counted as a parent asset. However, when later used to pay for the student's education, those distributions were treated as financial support to the student, reducing the student's eligibility for need-based federal financial aid in a future academic year.
That changed with the FAFSA Simplification Act, which took effect for the 2024-25 academic year. Under the current FAFSA rules, distributions from a grandparent-owned 529 plan are no longer reported in the same way. As a result, grandparents can help pay for a grandchild's education without those distributions reducing the student's eligibility for federal financial aid.
There is one important caveat, however. Not every college relies solely on the FAFSA.
Some schools also require the CSS Profile when awarding their own institutional financial aid. Since the CSS Profile asks for additional financial information, a grandparent-owned 529 plan may still be considered depending on the school's policies.
Potential Drawbacks of a 529 Plan
Your Money Is Primarily Earmarked for Education
A 529 gives you favorable tax treatment as the account is intended primarily for qualified education expenses. If you later decide to use the money for an unrelated purpose, you can withdraw it, but you may give up part of that tax advantage.
With a non-qualified distribution, the portion representing your original contributions comes back to you without being taxed again because you funded the account with after-tax dollars.
The earnings portion, however, is generally subject to federal income tax and an additional 10% federal tax penalty. State taxes or the recapture of previously claimed state tax benefits may also apply.
You Have Less Investment Choice Than With a Brokerage Account
A 529 doesn't give you access to the full investment universe you would have through a taxable brokerage account.
Instead, you select from the investment menus offered by the particular 529 plan. These may include age-based portfolios, target-enrollment portfolios, static portfolios, or portfolios composed of mutual funds and ETFs. The exact selection depends on the plan.
As such, you generally can't open your 529 and purchase whichever individual stock, bond, ETF, or other security catches your eye. If you prefer to construct and manage a highly customized portfolio, a taxable brokerage account gives you considerably more freedom.
Your State Tax Benefit May Be Limited or Nonexistent
As discussed earlier, many states offer an income tax deduction or credit for eligible 529 plan contributions. However, that benefit isn't universal.
For example, California and Hawaii impose a state income tax but don't offer a state tax deduction or credit for 529 contributions. Meanwhile, states such as Florida and Texas don't provide a state tax incentive because they don't levy a state income tax in the first place.
Your choice of 529 plan can also affect whether you qualify for a state tax benefit. Some states require you to contribute to their own state-sponsored 529 plan before you can claim a deduction or credit. Others offer tax parity, allowing eligible residents to claim the same benefit even when contributing to another state's plan.
Investment Values Can Fluctuate
A 529 isn't a federally guaranteed savings account, and its tax advantages don't protect you against investment losses.
Your account value rises and falls according to the investments you select. If your portfolio holds stocks or other market-sensitive assets, a downturn can reduce the balance, including at an inconvenient time when your grandchild is approaching college.
That's why your time horizon, or the number of years before your grandchild is expected to need the money, deserves attention when you select an investment allocation. If college is 15 years away, you have far more time to weather market swings than you would if the first tuition payment is due next fall.
Should You Consider a 529 Plan for Your Grandchild?
A 529 plan may be worth considering when you have money you can comfortably set aside to help save for your grandchild's college and enough time before they'll need it to benefit from tax-advantaged investment growth.
It's an attractive option if education is already part of your legacy plans and you want to retain control over the assets rather than gifting the money directly.
That being said, as meaningful a gift as paying for a grandchild's education can be, those contributions still come from assets that might otherwise support your own retirement.
Before committing a large lump sum or years of contributions, consider how that decision fits alongside your retirement income needs, Social Security benefits, healthcare costs, Roth conversion strategy, other lifetime gifts, and the estate you ultimately hope to leave behind.
At Smart Financial Lifestyle, we help you look at decisions like these as part of the bigger financial picture, from retirement income and tax planning to estate and legacy strategies.
If you're considering a 529 plan or another way to help your grandchildren financially, book a call with Smart Financial Lifestyle to discuss how that goal can fit within the retirement and legacy plan you've spent years building.
