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 Overfunding means excess funds face a 10% penalty on earnings if withdrawn for non-education purposes (though the SECURE 2.0 Act now allows rolling excess 529 funds into a Roth IRA, up to $35,000 lifetime).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.
College Savings Projector (529)
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.