Compare a 529 plan against a Roth IRA for college funding — with state-tax-deduction value, flexibility trade-off, and projected ending balance for any starting age and contribution level.
529 wins on pure college math — tax-free growth plus tax-free qualified withdrawals plus a state-tax deduction (in most states). Roth IRA wins on flexibility — if your child doesn't go, the money is still yours for retirement. Since 2024, the SECURE 2.0 Act allows rolling $35,000 of unused 529 funds to the beneficiary's Roth IRA, closing most of the historical flexibility gap.
| Account | Total Contributed | Ending Balance | Tax Treatment at Withdrawal | Flexibility |
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Takes about 1 minute.
529 plans. State-sponsored education-savings accounts. Contributions are after-tax federally, but most states offer an income-tax deduction for contributions to the in-state plan. Growth is tax-deferred; qualified withdrawals (tuition, room and board, books, K-12 tuition up to $10k/year) are tax-free. Non-qualified withdrawals: earnings taxed as income plus 10% federal penalty.
Roth IRA. Personal retirement account. Contributions are post-tax; growth is tax-free; qualified withdrawals (after age 59½ and 5-year rule) are tax-free. Contributions can be withdrawn anytime tax-free. Earnings withdrawn for education before 59½ avoid the 10% early-withdrawal penalty but are still taxed as ordinary income.
The 2024 SECURE 2.0 game-changer. Starting in 2024, you can roll unused 529 funds (up to $35,000 lifetime per beneficiary) into the beneficiary's Roth IRA. Conditions: 529 must be open 15+ years; rollover counts against annual Roth contribution limit; rollover must be of earned-income amount the beneficiary already has. This dramatically reduces "wasted 529 contribution" risk.
Financial-aid impact. Parent-owned 529 counts as parent asset (5.6% added to EFC on FAFSA). Roth IRA does NOT count as asset on FAFSA. But Roth IRA withdrawals count as student income on the next year's FAFSA — 50% of withdrawal hits EFC. The 2024-25 FAFSA simplification removed the worst grandparent-529 penalty. Net: parent-owned 529 is the cleanest aid-impact option.
College cost inflation. US college costs have risen 4-6%/year for two decades — well above general inflation. A $35,000/year in-state university today projects to ~$75,000/year for an 18-year horizon. The calculator's expected return needs to outpace this — 6% nominal is the typical default for an age-based 529 portfolio that gets more conservative as college approaches.
A 5-year-old has 13 years until college. The family contributes $5,000/year to either option. Expected return: 6% (typical age-based 529 portfolio). Illinois offers a $20,000 MFJ deduction at a 4.95% state tax rate; assume the family captures $5,000 of the deduction each year.
529 ending balance. $5,000/year × annuity factor at 6% over 13 years = $5,000 × 18.882 = $94,410. All available tax-free for qualified college expenses.
Roth IRA ending balance. Same $5,000/year, same 6% return = $94,410. Available tax-free at 59½ for retirement. Contributions ($5,000 × 13 = $65,000) available anytime for college; earnings ($29,410) taxable if withdrawn for college before 59½ (no 10% penalty due to education exception).
State tax savings. $5,000 × 4.95% = $247.50/year saved on Illinois income tax. Invested at 6% over 13 years = $247.50 × 18.882 = $4,673. Tilt to 529 of about $4,700.
Net comparison. 529 produces $94,410 fully usable for college plus $4,673 of compounded state-tax savings = $99,083 of college-funding power. Roth produces $94,410 of which $65,000 (the contributions) is tax-free for college and $29,410 earnings would be taxed as ordinary income — net effective Roth college-funding power is roughly $87,500. 529 wins by ~$11,500 (13% more). The state deduction adds 50% to this advantage.
What if state has no income tax (TX/FL/NV/etc.)? Drop the deduction and the 529 still wins on the tax-free-earnings advantage — but only by ~$7,000 instead of $11,500. The flexibility argument for Roth becomes correspondingly stronger.
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