What a reasonable 529 balance looks like at each stage
There is no single "correct" amount to have saved in a 529 plan at any given age. The right balance depends on how much you earn, how many children you're saving for, which state's plan you use, and when you started. What matters more than hitting a specific number is whether you're saving something consistently and whether your current pace gets you close to covering the costs you actually face.
That said, financial advisors often use benchmarks as a sanity check. If your child is 10 years old and you have nothing saved, you're in a different position than if you have $20,000 saved—and the math changes again if college costs $30,000 a year or $60,000 a year at your target school. These benchmarks help you see whether you're on track or whether you need to adjust your monthly contributions.
Key Takeaways
- A common benchmark is to have saved one year's worth of college costs by age 10, two years' worth by age 14, and three years' worth by age 17.
- These benchmarks assume you started saving at birth; if you started later, the monthly contribution needed to catch up is higher, but the target amount stays the same.
- The actual dollar amount depends entirely on the school type and cost level you're targeting—in-state public, out-of-state public, or private.
- If you're behind the benchmark, increasing your monthly contribution is usually more realistic than trying to catch up with a lump sum.
- 529 plans grow tax-free, so money saved earlier has more time to compound and reduces the total out-of-pocket amount you need to contribute.
How the age-based benchmarks work
The most widely used benchmark comes from financial planning research and assumes you're saving for a child born today. The target is to have saved enough by age 17 to cover four years of college costs in full. Working backward, the milestones are roughly:
- By age 10: one year of college costs
- By age 14: two years of college costs
- By age 17: three years of college costs
The fourth year is covered by a combination of the remaining balance and the investment growth that happens during the college years themselves. This assumes you started saving at birth and contributed consistently each month.
These benchmarks are useful because they tell you whether you're saving at a pace that will get you to a meaningful goal. If your child is 12 and you have less than one year's worth saved, you're behind the pace—but you can still adjust by increasing your monthly contribution or extending your timeline to include some parent loans or student contributions.
What one year of college costs actually means
The dollar amount behind "one year of college costs" varies widely. For the 2024–2025 academic year, published costs (tuition, fees, room, and board) are roughly:
| School Type | Approximate Annual Cost |
|---|---|
| In-state public university | $28,000–$32,000 |
| Out-of-state public university | $45,000–$55,000 |
| Private university | $60,000–$85,000 |
These are published prices, not what families actually pay after financial aid. But for 529 planning purposes, use the published price of the schools your child is likely to attend. If you're targeting an in-state public school at $30,000 per year, then "one year of college costs" means $30,000. By age 10, you'd aim to have $30,000 saved; by age 14, $60,000; by age 17, $90,000.
If you're targeting a private school at $75,000 per year, those same benchmarks mean $75,000 by age 10, $150,000 by age 14, and $225,000 by age 17. The benchmarks are the same; the dollar amounts are different.
What to do if you're behind the benchmark
Most families are behind the benchmark at some point—either because they started saving late, had a lower income in earlier years, or didn't prioritize 529 contributions. Being behind is not a failure; it just means you need to make a choice about how to close the gap.
The most practical option is to increase your monthly contribution. If your child is 12 and you have $15,000 saved but need $60,000 by age 17, you're short by $45,000. Over five years, that's $750 per month. If that's not realistic, you can reduce the target (perhaps aiming for two years of costs instead of four) or plan to cover the gap with parent loans, student loans, scholarships, or the student working during college.
Another option is to extend the timeline. Some families continue funding the 529 into the college years themselves, making contributions while the student is enrolled. This reduces the pressure to save everything before age 18 and lets you spread the contributions across a longer period.
Avoid the temptation to make a large lump-sum contribution to "catch up" unless you genuinely have the cash available. The tax benefits of a 529 are real, but they're not worth going into debt or draining your emergency fund.
How investment growth affects your target amount
The benchmarks assume your 529 balance grows through a combination of your contributions and investment returns. The longer money sits in the account, the more it grows. This is why starting early matters so much: $100 per month from birth to age 18 grows to roughly $28,000–$35,000 depending on your investment mix, whereas $100 per month from age 10 to 18 grows to roughly $10,000–$12,000.
The exact growth depends on how you invest the 529 balance. Age-based portfolios (which automatically shift from stocks to bonds as college approaches) typically assume a 5–7% average annual return in the early years and lower returns as the student gets closer to college. Conservative portfolios assume 3–4% returns. Aggressive portfolios assume 7–8% returns.
When you're calculating whether you're on track, use a realistic return assumption for your actual investment choice, not an optimistic one. If you're unsure, 5% is a reasonable middle-ground assumption for planning purposes.
Adjusting benchmarks for your specific situation
The standard benchmarks assume you're saving for one child starting at birth. Your situation may be different, and that's fine—adjust the benchmarks to match your reality.
If you have multiple children, you don't need to hit the full benchmark for each child. Many families save what they can and plan to cover the gap with a mix of scholarships, student work, and loans. If you're saving for a child who is already a teenager, you can't go back in time, so focus on what you can contribute between now and college rather than comparing yourself to the birth-to-age-10 benchmark.
If you're targeting a community college for the first two years and then transferring to a four-year school, your total cost is lower, so your benchmark is lower. If you're targeting a school with strong merit aid, you might reasonably plan to cover less out of pocket. The benchmarks are a starting point, not a rule.
When to revisit and adjust your 529 plan
Check your 529 balance and your progress toward your target once a year, ideally around the same time each year (such as when you file taxes or on your child's birthday). At that point, ask yourself three questions: Am I still on track to hit my target? Have my circumstances changed (income, number of children, target school)? Do I need to adjust my monthly contribution?
As your child gets closer to college, your investment strategy should shift too. Most 529 plans offer age-based portfolios that automatically become more conservative as college approaches, reducing the risk that a market downturn in your child's senior year of high school will wipe out years of savings. If you're using a self-directed portfolio, you should manually shift toward bonds and cash in the two to three years before college.
If your child receives a large scholarship or decides not to attend a four-year college, you can change the beneficiary to a younger sibling or cousin, or you can withdraw the earnings (though you'll owe taxes and a 10% penalty on the earnings portion). Plan for this possibility, but don't let it stop you from saving.
Frequently Asked Questions
What if I started saving late and my child is already in high school?
Focus on saving what you realistically can between now and college rather than trying to hit the full benchmark. Even $200–$300 per month for two years is better than nothing, and it reduces the amount your child needs to borrow. You can also plan to cover part of the cost with parent loans, student work, or scholarships.
Do I need to save the full four years of college costs in a 529?
No. Many families save two to three years' worth and plan to cover the rest with scholarships, student loans, or parent contributions during the college years. The benchmark is a target, not a requirement. Save what you can and adjust your expectations accordingly.
How much should I contribute each month to stay on track?
It depends on your child's age, your target cost, and how much you've already saved. If your child is 5 and you're targeting $120,000 by age 17, you'd need roughly $400–$500 per month (assuming 5% investment growth). Use a 529 calculator from your state plan or a financial website to get a number tailored to your situation.
What happens to my 529 if my child gets a full scholarship?
You can withdraw the contributions without penalty or tax. The earnings portion is subject to income tax and a 10% penalty if withdrawn. Alternatively, you can change the beneficiary to a sibling or younger relative and keep the money in the plan.
Should I prioritize 529 savings over my retirement savings?
No. Retirement savings should come first because you can't borrow for retirement the way you can for college. Save for retirement first, then contribute to a 529 with whatever is left over. Your child has more options for paying for college than you do for paying for retirement.