The Moment
You have a child (or are expecting one) and you want to start saving for college. A 529 plan is the best vehicle — tax-free growth and tax-free withdrawals for education expenses. But how much should you contribute?
The instinct is to save as much as possible. The reality is more nuanced: overfunding a 529 creates a tax problem, and retirement savings should come first.
The Target Range
The math: - Average 4-year public university cost (2026): ~$25,000/year = $100,000 total - Average 4-year private university cost (2026): ~$55,000/year = $220,000 total - College costs have historically grown at ~5% annually
The contribution targets:
Conservative ($200/month from birth): At 6% annual returns over 18 years, $200/month grows to roughly $77,000. This covers about 75% of public university costs. The remaining 25% can come from financial aid, scholarships, work-study, or cash flow at the time.
Moderate ($350/month from birth): Grows to roughly $135,000. Covers most of public university or about 60% of private university.
Aggressive ($500/month from birth): Grows to roughly $193,000. Covers public university fully or about 85% of private.
The key insight: You do not need to fund 100% of college costs through the 529. Scholarships, financial aid, part-time work, and your income at the time of enrollment all contribute. Overfunding means excess funds face a 10% penalty on earnings if withdrawn for non-education purposes (though the SECURE 2.0 Act now allows rolling excess 529 funds into a Roth IRA, up to $35,000 lifetime).
Run Your Numbers
Enter your monthly contribution to see projected college savings.
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The Priority Order
Fund retirement before college. Your children can borrow for college. You cannot borrow for retirement. This is not selfish — it is structural. A parent with a funded retirement does not become a financial burden on their children later.
The right order: 1. Capture your 401(k) match 2. Fund your Roth IRA ($7,000/year) 3. Then contribute to the 529 4. If you have more, increase 401(k) contributions
State tax deduction: Many states offer a tax deduction or credit for 529 contributions. Check your state — the deduction can range from $2,000 to unlimited, and it effectively reduces the cost of contributing.
What to explore next
- →Which state's 529 plan should I use?
- →What investments should I choose in my 529?
- →Should I prioritize 529 or paying down my mortgage?
Frequently Asked Questions
What if my child does not go to college?
529 funds can be used for trade schools, apprenticeships, K-12 tuition (up to $10,000/year), and student loan repayment ($10,000 lifetime). You can also change the beneficiary to another family member (sibling, cousin, yourself). As of 2024, excess funds can be rolled into a Roth IRA (up to $35,000 lifetime, subject to annual Roth contribution limits).
Should grandparents contribute to the 529?
Yes — and there is a powerful estate planning benefit. Contributions to a 529 qualify for the annual gift tax exclusion ($18,000/person/year). Grandparents can also superfund a 529 with up to 5 years of gifts at once ($90,000) without triggering gift tax. This is a legitimate estate planning tool.