What Is a 529 Plan?
A 529 plan is a tax-advantaged savings account designed specifically for education expenses. Named after Section 529 of the Internal Revenue Code, these plans are sponsored by states and offer two primary benefits: investment earnings grow federal tax-free, and withdrawals used for qualified education expenses are also tax-free. This double tax advantage makes 529 plans the most efficient vehicle for college savings — and recent rule changes have made them even more flexible.
The Two Types of 529 Plans
529 Savings Plans
The most common type. You contribute money, choose from a menu of investment options (typically mutual funds or age-based portfolios), and the account grows based on market performance. Withdrawals for qualified expenses are tax-free. These function similarly to a Roth IRA but for education. You can use funds at any accredited institution nationally — not just in your state.
529 Prepaid Tuition Plans
Less common and offered by fewer states. You purchase future tuition at today's prices, essentially locking in the current rate. These are lower-risk but less flexible — they typically only cover tuition (not room and board) and are often limited to in-state public universities. If your child attends a different school, the payout may not cover the full cost.
Tax Advantages in Detail
- Federal tax-free growth: All investment gains grow without federal income tax. On a $50,000 portfolio growing at 7% over 18 years, this saves approximately $25,000–$40,000 in taxes compared to a taxable brokerage account.
- Federal tax-free withdrawals: Withdrawals for qualified expenses (tuition, fees, room, board, books, computers, and up to $10,000/year for K-12 tuition) owe zero federal tax.
- State tax deductions: Over 30 states offer state income tax deductions or credits for 529 contributions. This can save $200–$1,000+ per year depending on your state and contribution amount. Check your state's specific rules.
- Gift tax benefits: You can contribute up to $18,000/year per beneficiary (2024 limit) without triggering gift tax. A special provision allows "superfunding" — contributing up to $90,000 in a single year (5 years of gifts) without gift tax consequences.
The New 529-to-Roth IRA Rollover
Starting in 2024, unused 529 funds can be rolled over into a Roth IRA for the beneficiary, subject to these rules:
- The 529 account must have been open for at least 15 years
- Annual rollover is limited to the annual Roth IRA contribution limit ($7,000 in 2024)
- Lifetime rollover cap: $35,000 per beneficiary
- Contributions made within the last 5 years and their earnings cannot be rolled over
This change eliminates the biggest objection to 529 plans: the risk of overfunding. If your child receives a scholarship, chooses not to attend college, or the account grows beyond what is needed, excess funds now have a productive tax-free destination in a Roth IRA.
Investment Strategy by Age
| Child's Age | Years Until College | Recommended Allocation |
|---|---|---|
| 0–5 | 13–18 years | 80–100% equities (stock index funds). Maximum growth period — volatility is acceptable with this time horizon. |
| 6–10 | 8–12 years | 60–80% equities, 20–40% bonds. Begin gradually reducing risk. |
| 11–14 | 4–7 years | 40–60% equities, 40–60% bonds. Capital preservation becomes increasingly important. |
| 15–17 | 1–3 years | 20–40% equities, 60–80% bonds/stable value. Protect accumulated savings from market downturns. |
| 18+ | In college | 0–20% equities, 80–100% stable value/money market. Funds needed within 1–4 years should not be subject to market risk. |
Most 529 plans offer age-based portfolios that automatically adjust this allocation. If your plan offers a low-cost age-based option (expense ratio under 0.30%), this is often the simplest and most appropriate choice.
Common 529 Mistakes
- Not starting early enough: A $200/month contribution starting at birth grows to approximately $86,000 by age 18 (7% return). Starting at age 10 with the same contribution reaches only $29,000. Time is the most powerful factor.
- Using your home state's plan blindly: While the state tax deduction matters, a plan with high fees can erase that benefit. Compare your state's plan fees against top-rated plans from states like Utah, Nevada, and New York. Some states allow deductions for contributions to any state's plan.
- Being too conservative too early: A newborn's 529 in a money market fund will barely keep pace with tuition inflation. Use aggressive equity allocations for accounts with 10+ year horizons.
- Forgetting the FAFSA impact: 529 plans owned by the student or parent are assessed at a maximum 5.64% in the FAFSA formula. Grandparent-owned 529s are no longer counted as student income under the simplified FAFSA — making them an excellent planning tool.
Use our college cost data to estimate how much you need to save for your target schools, and work backward to determine the monthly 529 contribution required.