The hosts of the How to Money podcast, on Friday Flight episode #1131, drew a line most parents funding a 529 have never thought about. “If you have $35,000 in there, great. If you are looking at investing and socking away even more than $35,000 into a 529, I think you need to start being careful and start really weighing the options because you’re going to have a whole lot less flexibility.”
That number traces to the SECURE 2.0 Act, which lets leftover 529 funds be rolled into the beneficiary’s Roth IRA up to a $35,000 lifetime cap. Pile in more than that, and any excess is locked to qualified education spending or subject to a 10% penalty plus income tax on the growth at withdrawal.
The Hosts Are Right, and the Math Backs Them Up
This advice is sound, and the break-even is easy to show. Picture two parents, each saving for a newborn with an 18-year horizon at an assumed 7% annual return.
Parent A contributes $150 a month. By age 18, the account is worth roughly $65,000. If the child wins a scholarship or skips college, the family can roll the $35,000 cap into a Roth (spread across years, subject to the annual Roth contribution limit), leaving about $30,000 stranded. Pulling that stranded balance means income tax plus a 10% penalty on the earnings portion.
Parent B contributes roughly $85 a month. The account reaches about $35,000 at age 18. If the kid doesn’t need it, the entire balance can migrate to a Roth over several years with zero penalty exposure.
That second saver is the model. You capture tax-free growth on education dollars and keep a clean exit if plans change. Beyond $35,000, each additional dollar is a bet that your specific kid will attend a specific kind of school at a specific cost. That is a lot of specificity for an 18-year forecast.
Who Benefits From Bigger 529 Balances, and Who Doesn’t
Overfunding can still work in a narrow profile: high-income households in states with generous 529 tax deductions (New York, Illinois, and a handful of others), parents certain about private K-12 use now allowed under SECURE 2.0, or grandparents doing legacy planning where the beneficiary can be reassigned across children and grandchildren.
It hurts families whose savings capacity is already stretched. The personal savings rate fell from 6% in the first quarter of 2024 to 4% in the fourth quarter of 2025, even as per capita disposable income rose to $67,648. Households with less slack cannot afford dollars trapped in an account that punishes a change of plans.
What to Do Before Your Next Contribution
- Check the current balance against the $35,000 Roth rollover cap. If you’re under, keep going. If you’re over, pause and reassess whether the state tax break justifies the locked-in flexibility loss.
- Quantify your state tax deduction in dollars. A 5% deduction on $10,000 of contributions is $500 a year. Weigh that benefit against the cost of potentially stranding funds later.
- Redirect surplus savings to a taxable brokerage or a custodial Roth once the child has earned income. Both preserve flexibility a 529 surrenders, and a taxable account still enjoys long-term capital gains treatment.
Suze Orman, in a separate episode this week, reminded a listener that “Money that you need in nine months, that’s money that’s in a money market account within the 529 plan. You need five years or longer for money that’s in the stock market.” The mirror-image lesson applies on the way in: match the vehicle to the goal, and don’t trap money you may not need. Treat $35,000 as the ceiling, not the floor.
Top Gaining Stocks
Top Losing Stocks