College Savings Plan Growth
Last reviewed: May 2026
A 529 plan is a tax-advantaged savings account designed for education expenses. Contributions grow tax-free, and withdrawals for qualified education costs — tuition, room and board, books, computers, and up to $10,000/year for K-12 — are also tax-free. Over 30 states offer additional income tax deductions or credits for contributions. With college costs rising 3–5% annually and the average 4-year public university now costing over $110,000 total, a 529 plan is the most powerful tool available for building an education fund. The SECURE 2.0 Act added a new benefit: unused 529 funds can now be rolled into a Roth IRA (up to $35,000 lifetime, subject to conditions).1
| Institution Type | 2025 Annual Cost | 4-Year Total (2025) | 4-Year Total (Start 2040) |
|---|---|---|---|
| Public in-state | $28,840 | $115,360 | $196,000 |
| Public out-of-state | $46,730 | $186,920 | $318,000 |
| Private nonprofit | $60,420 | $241,680 | $411,000 |
*2040 projections assume 3.5% annual education inflation. Includes tuition, fees, room and board.
| Child's Age Now | Years Until College | Monthly for $100K (6% return) | Monthly for $200K (6% return) |
|---|---|---|---|
| Newborn | 18 | $258 | $516 |
| 5 | 13 | $395 | $790 |
| 10 | 8 | $791 | $1,582 |
| 13 | 5 | $1,433 | $2,866 |
Over 30 states offer income tax deductions or credits for 529 contributions. The value ranges from modest (Arizona: $2,000 deduction per beneficiary) to substantial (Pennsylvania: $17,000 per beneficiary, per contributor). Some states like Arizona and Kansas allow deductions for contributions to any state's plan, giving you flexibility to choose the best-performing plan regardless of your state. Nine states have no income tax at all, making the state deduction irrelevant. Even without a state deduction, the federal tax-free growth makes 529 plans the best education savings option available.2
A 529 plan is a tax-advantaged savings account designed for education expenses. Contributions grow tax-free, and withdrawals are also tax-free when used for qualified education costs including tuition, fees, room and board, books, supplies, and up to $10,000 per year for K–12 tuition. There are two types: savings plans (which invest contributions in mutual funds or ETFs) and prepaid plans (which lock in current tuition rates at participating institutions). The savings plan type is far more popular and flexible, with no restrictions on which schools the funds can be used at — any accredited institution in the U.S. and many abroad.
| Monthly Contribution | 10 Years (7%) | 15 Years (7%) | 18 Years (7%) |
|---|---|---|---|
| $100/month | $17,308 | $31,696 | $42,872 |
| $250/month | $43,271 | $79,241 | $107,181 |
| $500/month | $86,541 | $158,481 | $214,362 |
| $750/month | $129,812 | $237,722 | $321,543 |
| $1,000/month | $173,083 | $316,963 | $428,724 |
*Assumes 7% annual return, compounded monthly. Does not account for fees or taxes on non-qualified withdrawals.
Over 30 states offer income tax deductions or credits for 529 contributions. The value varies dramatically — from full deduction of any contribution amount (in states like Colorado and South Carolina) to modest caps of $2,000–$4,000 per beneficiary. Some states require you to invest in the home state plan to claim the deduction, while others allow deductions for contributions to any state's plan. A family in a state with a 5% income tax rate and a $10,000 deduction limit saves $500 per year in state taxes from 529 contributions alone. Over 18 years, that is $9,000 in tax savings on top of the tax-free growth.
Qualified expenses for 529 withdrawals include tuition at any accredited post-secondary institution (and up to $10,000/year for K–12), mandatory fees, room and board (up to the school's cost-of-attendance allowance for off-campus students), books, supplies, equipment including computers and software required for coursework, and special needs services. Starting in 2024, 529 funds can also be used for student loan repayment up to a $10,000 lifetime limit per beneficiary. Non-qualified withdrawals face income tax plus a 10% penalty on the earnings portion — the contribution portion is always returned penalty-free since it was made with after-tax dollars.
The SECURE 2.0 Act created a powerful new feature: starting in 2024, unused 529 funds can be rolled over to a Roth IRA for the beneficiary, subject to several conditions. The 529 account must have been open for at least 15 years, rollovers are limited to $35,000 lifetime per beneficiary, annual rollovers cannot exceed the Roth IRA annual contribution limit ($7,000 in 2025), and contributions made within the last five years are ineligible. This provision eliminates the biggest hesitation parents had about 529 plans — the risk of overfunding. Any excess funds can now transition into retirement savings for the child rather than being withdrawn with penalties.
529 plans are operated by individual states, and plan quality varies significantly. The key differentiators are expense ratios (the annual fee charged on invested assets), investment options, and state tax benefits. Low-cost plans from states like Utah, Nevada, and New York offer index fund options with total expense ratios of 0.12–0.20%, while higher-cost plans can charge 0.50–1.00% or more. Over 18 years on a $200,000 balance, the difference between a 0.15% and 0.75% expense ratio is approximately $18,000 in fees — money that would otherwise compound toward tuition.
Age-based portfolios are the most popular option, automatically shifting from aggressive (80–90% stocks) for young beneficiaries to conservative (70–80% bonds) as college approaches. This glide path protects against a market downturn in the years just before tuition bills arrive. Static portfolios that maintain a fixed allocation are available for investors who prefer to manage their own asset allocation or who have a different risk tolerance than the default age-based path.
A unique 529 provision allows a lump-sum contribution of up to five years of gift tax exclusions in a single year without triggering gift tax. For 2025, this means an individual can contribute up to $95,000 ($19,000 × 5) or a married couple can contribute $190,000 in one year per beneficiary. This "superfunding" strategy maximizes the time invested, taking advantage of compound growth from day one. A $95,000 lump sum invested at birth earns approximately $340,000 by age 18 at a 7% return — compared to $214,000 from monthly contributions that total $108,000 over the same period. Grandparents often use this strategy to make a meaningful education gift while also reducing their taxable estate.
Parent-owned 529 plans are treated as parental assets on the FAFSA, assessed at a maximum rate of 5.64% of the account value (compared to 20% for student-owned assets). A $100,000 parent-owned 529 reduces financial aid eligibility by approximately $5,640 per year. Grandparent-owned 529 plans received favorable treatment starting with the 2024–2025 FAFSA: distributions from grandparent 529s are no longer counted as student income, removing the previous penalty that could reduce aid by up to 50% of the distribution amount. This change makes grandparent-owned 529 plans a significantly more attractive option for families expecting to qualify for need-based financial aid.
A 529 beneficiary can be changed to any member of the original beneficiary's family — including siblings, parents, first cousins, nieces, nephews, and their spouses — without tax consequences. This flexibility means a 529 plan never needs to be wasted. If the original beneficiary earns a full scholarship, the funds can be redirected to a sibling's education, rolled to a Roth IRA under the new rules, or withdrawn penalty-free up to the scholarship amount (income tax applies on earnings, but the 10% penalty is waived). This makes 529 plans one of the most flexible education savings vehicles available.
→ Start at birth. $300/month from birth at 6% = ~$116K at 18. The same amount starting at age 10 yields only ~$39K. Time is your biggest asset.
→ Don't over-save. Target 33–50% of projected cost. The SECURE 2.0 Roth rollover ($35K) reduces risk, but it's still better to balance 529 contributions with retirement savings.
→ Use age-based portfolios. These automatically shift from stocks to bonds as college approaches — aggressive early, conservative near enrollment. Set and forget.
→ Ask family for contributions. Grandparents can contribute to a 529 without gift tax implications (up to $18K/year per beneficiary, or $90K as a 5-year superfunding gift).
See also: Compound Interest · Savings Goal · Tax Calculator · Inflation