If you have a child, you’ve probably heard you should open a 529. But here’s what Vanguard really wants parents to understand: just having an account isn’t enough.

How you fund it, when you start, what you invest in, and how you handle the tax strategy is the difference between covering tuition and scrambling for loans years from now. 

According to the College Board, the average sticker price for a private nonprofit four-year college now runs $45,000 a year in tuition and fees alone for the 2025 to 2026 school year. 

Public schools aren’t cheap either; in-state tuition averages $11,950 annually, with total costs including room and board often reaching $30,000 or more per year. A four-year degree at a private school can easily top $260,000 before financial aid.

Those prices aren’t coming down: College tuition has historically risen at roughly 3% to 4% per year, outpacing general inflation.

A child born today faces a college price tag that could be dramatically higher by the time they enroll in 2043 or 2044. So, to secure your child’s future, here are Vanguard’s best strategies when leveraging 529s.

1. Start as early as possible and let compounding do the work

The single biggest lever Vanguard emphasizes is time. A 529 plan opened when a child is born has 18 years of potential growth. The power of compounding, where investment returns generate their own returns over time, means even small regular contributions can build into significant funds when given years to grow.

A family that contributes $200 per month from birth into an account earning an average of 6% annually would accumulate roughly $78,000 by the time a child turns 18. Start at age 10, and that same $200 per month yields roughly half that amount. Every year of delay narrows the window.

The practical move is to open the account now, even with a small amount, and set up automatic monthly contributions. You do not need to contribute $200 a month to benefit. Even $50 per month from birth at 6% grows to roughly $19,500 by age 18. The key is consistency: treat the 529 like a recurring bill, not a discretionary deposit.

2. Maximize your state tax benefits before choosing a plan

Many states offer tax deductions or credits for 529 contributions, and Vanguard lists this as the first factor families should evaluate when choosing a plan. Some states give those benefits regardless of which state’s 529 you invest in, while others require you to use the in-state plan.

The math can be meaningful. Vanguard illustrates the effect plainly: a family contributing $25 per week with a 5% state tax rate could save $65 per year on taxes. If that $65 gets reinvested into the 529, it could compound into an additional $3,500 for education over 18 years.

When I dug into Vanguard’s guidance on this point, what stood out was how many families skip this step entirely. Before you open any 529, check your state’s plan first. Look up whether your state offers a deduction, whether it requires you to use the in-state plan to claim it, and how your state’s fees compare to Vanguard’s. 

If your state’s deduction is generous and its plan fees are reasonable, the in-state plan may be the better deal. If your state offers no deduction or has high fees, Vanguard’s 0.14% expense ratio likely wins.

State tax treatment also varies for K-12 withdrawals, apprenticeship expenses, student loan repayments, and Roth IRA rollovers, all of which are determined by the state where you file income tax. Vanguard recommends consulting with a tax advisor for further guidance.

3. Keep fees low so more of your money stays invested

Fees are easy to ignore until you see what they cost over time. Vanguard’s average 529 expense ratio is 0.14%, compared to an industry average of 0.46%, according to ISS Market Intelligence data as of December 2025. That’s a difference that compounds year after year.

Here is what that looks like in practice. A family investing $3,000 per year for 18 years at a 6% return would accumulate roughly $103,000 in a plan charging 0.14%. The same family in a plan charging 0.46% would end up with roughly $98,000. That is a $5,000 gap created entirely by fees, not by market performance. The more you contribute and the longer your time horizon, the wider that gap grows.

Morningstar has consistently ranked low-cost 529 plans, including Vanguard’s, among the top options. The Vanguard 529 College Savings Plan is technically a Nevada trust, meaning it’s administered by the Nevada State Treasurer, but it’s open to residents of any state.

It’s important to compare the expense ratios of your state’s plan and Vanguard’s plan side by side. If your state’s plan charges 0.30% or more and offers no state tax deduction, the fee savings from switching to Vanguard could be worth thousands over the life of the account.

4. Choose the right investment approach for your timeline

Vanguard’s recommended starting point for most families is their Target Enrollment Portfolios. These are age-based portfolios that automatically shift from aggressive, growth-oriented investments to more conservative holdings as the child approaches college age.

You pick a portfolio based on the year closest to when you expect your student to start school, and the portfolio does the rest, including automatically shifting your savings to become more conservative as the target date draws near.

For families who prefer more control, Vanguard also offers more than 20 individual portfolios, including stock and bond index funds, blended options, and a money market option. You can select up to 5 portfolios at a time and manage that mix based on your time horizon and risk tolerance.

Saving for college should be a mandatory, not discretionary, budget item.

Photo by Ippei Naoi on Getty Images

In addition, many 529 plans offer static portfolios, which maintain a fixed asset allocation, such as 60% stocks and 40% bonds, and don’t change over time. These are ideal if you have a strong opinion about asset allocation and a track record of following through on rebalancing.

When I consider which approach fits most families, the target enrollment portfolios win for the same reason index funds win: they remove the temptation to tinker.

If your child is under 5, pick the target enrollment portfolio closest to their expected college year and move on. If your child is 13 or older, check that the portfolio’s risk level still matches your remaining timeline. The IRS limits you to two investment changes per calendar year within the plan, so choose carefully and avoid reactive moves during market dips.

5. Know the difference between a savings plan and a prepaid tuition plan

When exploring how to save for education, it’s helpful to understand the difference between the two types of 529 plans. While both offer valuable tax benefits and have a similar impact on financial aid, they serve different needs and come with distinct advantages and limitations.

A 529 savings plan offers greater flexibility. Qualified expenses include tuition, fees, books, supplies, room and board, K-12 expenses up to $20,000 per year, apprenticeship costs, postsecondary credentialing program expenses, and up to $10,000 in lifetime student loan repayments per beneficiary. The funds can be used at nearly any accredited institution in the U.S. and some abroad. The trade-off is market risk: your account grows or declines based on investment performance.

A 529 prepaid tuition plan lets you pay in advance at today’s tuition rates, eliminating market risk, but coverage is typically limited to tuition and mandatory fees at in-state public institutions. If the beneficiary attends a different school, reimbursement may be limited and based on the plan’s predetermined value, potentially resulting in little or no growth.

The decision rule is straightforward. If you are confident your child will attend a specific in-state public university, a prepaid plan locks in today’s tuition rates and removes market risk. For everyone else, a savings plan offers broader flexibility, more qualified expense coverage, and long-term growth potential that a prepaid plan cannot match.

6. Use the Roth IRA rollover as your safety net for unused funds

For years, the biggest objection to 529 plans was the “what if” problem. What if my child doesn’t go to college? What if they get a full scholarship? What if there’s money left over?

Vanguard addresses this directly. Thanks to the SECURE 2.0 Act, unused 529 funds can now be rolled over penalty-free into the beneficiary’s Roth IRA, up to $35,000 lifetime.

The 529 must have been open for at least 15 years, contributions from the last 5 years are ineligible, and transfers are subject to annual Roth IRA contribution limits. Not all states recognize this as a qualified expense, so it’s important to verify with a tax advisor.

Related: Fidelity’s 4 Roth strategies could save your family a fortune in taxes

This is the detail that changes the calculus for cautious parents. If you open a 529 the year your child is born, the account qualifies for Roth rollovers by the time they turn 15, well before college decisions are final.

A full $35,000 rollover at age 22, growing at 7% in a Roth IRA, could be worth roughly $525,000 by age 65, completely tax-free. That transforms leftover college savings into a retirement head start.

For families with significant assets, “superfunding” lets you front-load up to 5 years of annual gift tax exclusions into a single contribution.

In 2026, the exclusion is $19,000 per donor per beneficiary, so a married couple can contribute up to $190,000 ($95,000 each) in a single year without gift tax reporting, as long as no additional gifts are made to that child for 5 years.

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You can also change the beneficiary of your account at any time, as long as the new beneficiary is a qualified family member, including siblings, step-siblings, children, grandchildren, or even yourself. This means money in a 529 is never truly stranded.

Common mistakes that undermine your 529 strategy

A 529 is a powerful tool, but it is not foolproof. These are the mistakes that often cost families money:

  • Waiting for the right time. There is no perfect market entry point for a 529. Contribute what you can, when you can, and let time handle the rest.
  • Ignoring your state’s tax deduction. Some states require you to use their own plan to get the deduction. Check before defaulting to any out-of-state option, even Vanguard’s.
  • Using a high-fee plan. With Vanguard’s 0.14% expense ratio compared to the 0.46% industry average, compounding fees are a real drag over 18 years. Shop for low-cost options.
  • Overfunding without a plan. Thanks to the SECURE 2.0 Roth rollover, excess funds aren’t stranded, but the 15-year account seasoning requirement means you need to plan ahead.
  • Treating a 529 as guaranteed. Investment returns are not guaranteed. A 529 is an investment account, not a savings account; it can lose value. Vanguard and other providers make this clear in their disclosures.
  • Misunderstanding financial aid impact. A parent-owned 529 is counted at a maximum rate of 5.64% in FAFSA aid calculations, far more favourable than the 20% rate for student-owned assets. Under updated FAFSA rules effective with the 2024 to 2025 cycle, distributions from grandparent-owned 529s no longer count as student income, removing a major disincentive to grandparent-funded accounts.
  • Using funds for non-qualified expenses. If you withdraw 529 money for expenses that don’t qualify, you owe federal income tax on the earnings plus a 10% penalty. Before making any withdrawal, verify that the expense qualifies under the latest IRS rules.

The right 529 strategy gives your child options, not obligations

What Vanguard is ultimately pointing to is a set of principles that most families underestimate: start early, keep fees low, choose the right investment approach for your timeline, take full advantage of your state’s tax benefits, and understand the difference between a savings plan and a prepaid plan.

A 529 may not be ideal if your child is likely to receive a full scholarship, if you expect to need the money for other purposes, or if your state offers no tax deduction for out-of-state contributions and you prefer a plan from another state. In those cases, speak with a financial advisor to weigh alternatives.

The strategy is less about chasing returns and more about giving growth the time it needs to work. Starting early doesn’t just build an account balance; it builds flexibility, reduces pressure, and increases the likelihood that college costs can be met with confidence.