Am I putting too much into my 529?
Saving past what college costs is a real risk, not a nice problem to have — money in a 529 is committed to education before it is anything else. This checks whether your current path overshoots.
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Fill in your situation above, then press Run the numbers to see your four paths.
Why overfunding is a real risk, not a nice problem
A 529 is a committed account. Money inside it is earmarked for education before it is available for anything else, and taking it out for a non-qualified purpose means income tax on the earnings plus an additional federal tax of 10% on those earnings, per IRS Publication 970.
That is the cost of overshooting. It is not catastrophic, and it applies only to the growth rather than to what you put in — but it is real, and it is why saving past the bill is a genuine trade-off rather than simply being ahead.
Overshooting is easier than it sounds
Two things cause it. The first is a long horizon: a balance with fifteen years of compounding ahead of it can pass its target without the contributions ever feeling large. The second is a change of plan — a scholarship, a less expensive school, a student who does not attend at all. The projection was right; the bill simply arrived smaller.
This is worth knowing early rather than late, because the responses available to you are much better while there is still time. Reducing contributions costs nothing. Withdrawing the excess afterwards does.
Money left over is not money wasted
If a surplus does appear, most of the routes out of it cost nothing in federal tax: changing the beneficiary to another family member, holding the account for a future student, using it for graduate school or qualifying apprenticeships, or — within limits — rolling some of it into the beneficiary’s Roth IRA. The leftover-money tool works through those in detail.
Common questions
- What happens if I put too much in a 529?
Nothing happens while the money stays invested. The consequence only arrives if you eventually withdraw it for something other than qualified education expenses, at which point the earnings portion is subject to income tax plus the 10% additional federal tax described in Publication 970. Your contributions come back untaxed.
- Is there a limit on how much I can contribute?
Plans set their own aggregate balance caps, and contributions interact with federal gift tax rules. Both are plan- and circumstance-specific, so this tool does not assert a figure — check your plan’s disclosure and a tax professional rather than a calculator.
- If my child gets a scholarship, is the extra money stuck?
No. A scholarship creates a specific exception: a withdrawal up to the amount of the scholarship escapes the 10% additional tax, though the earnings are still subject to income tax. Publication 970 states the exception applies only to the extent the distribution is not more than the scholarship.
Same numbers, different question
- Should I stop contributing to my 529?Compare all four contribution paths at once
- Am I on track?See your funding ratio and what would close the gap
- How much should I contribute each month?Work backwards from the bill to a monthly number
- How should I split savings between my children?Work out the split that levels your children up
- I have leftover 529 money. Now what?Rank the reuse, rollover and withdrawal pathways
- 529 or a brokerage account?Weigh the 529 tax advantage against keeping your options open
Your numbers carry across. They stay in this browser tab and are never sent anywhere.