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529 Calculator 2025

Project how much your 529 college savings plan will grow by the time your child starts school — then compare it to the inflated cost of college and see your savings gap or surplus.

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How the 529 Calculator Works

This calculator answers the two questions every parent has: how much will my 529 be worth when my child starts college, and will it be enough? It takes your child's current age, the age you expect college to begin, your existing 529 balance, and your monthly contribution, then grows that money at your expected investment return — with monthly compounding — all the way to your child's first year of college.

On the other side of the ledger, it takes today's annual cost of college and inflates it forward at your chosen college-cost inflation rate to each year your child will be enrolled, summing across all years in school. Comparing the two gives you a clear coverage percentage and a dollar gap or surplus, so you can adjust your contribution before it's too late. Defaults reflect typical 2025 figures — a young child, a public-school cost around $28,000, a 6% return, and 5% tuition inflation — so the page is useful the moment it loads.

Who Benefits Most From a 529 Plan

  • Parents of young children who have the most years for tax-free compounding to work.
  • Families in states with a 529 deduction or credit who get an immediate state-tax benefit on contributions.
  • Grandparents wanting to help with college while reducing their taxable estate and keeping control of the funds.
  • Higher earners who have maxed other tax-advantaged accounts and want more tax-free growth.
  • Disciplined savers who will keep contributing monthly and want to track progress against a clear goal.

Who Should Look Elsewhere

A 529 is not the right first move for everyone. If you're carrying high-interest debt or lack an emergency fund, pay those down and build a cash cushion before locking money into an education-only account. If your own retirement is underfunded, prioritize your 401(k) and IRA first — your child can borrow for college, but you can't borrow for retirement, and a well-funded retirement is itself a gift to your children. Families who are genuinely unsure their child will pursue college or training may prefer the flexibility of a Roth IRA or taxable account, though the new $35,000 Roth rollover and beneficiary-change rules have softened this concern. And if you want a broader range of investments than your plan offers, a Coverdell ESA or brokerage account gives more control. Use this calculator to size the goal, but fit the 529 into a complete financial plan.

Tax Implications of a 529 Plan

The 529's power comes from its tax treatment. Money inside the account grows tax-free — no annual tax on dividends or capital gains — and withdrawals are entirely tax-free when spent on qualified education expenses such as tuition, fees, books, required equipment, and room and board for at-least-half-time students. There is no federal deduction for contributions, but more than 30 states offer a state income-tax deduction or credit, usually only for contributions to that state's own plan, so check your state's limits.

The flip side: non-qualified withdrawals are taxed as ordinary income on the earnings portion plus a 10% federal penalty on those earnings (your contributions always come out tax- and penalty-free). The penalty is waived for amounts matching a scholarship, the beneficiary's death or disability, or attendance at a U.S. military academy. Under SECURE 2.0, you can also roll up to a $35,000 lifetime amount of unused 529 funds into the beneficiary's Roth IRA, provided the account has been open at least 15 years and you stay within annual Roth limits. Consult a tax professional for your state's specific rules and any recapture provisions.

Tips, Tricks & Things to Watch

  • Start as early as possible — even small monthly amounts from birth beat larger amounts started in high school, because compounding needs time.
  • Claim your state tax benefit — if your state offers a deduction or credit, contribute at least up to the annual limit to your home-state plan before considering others.
  • Consider superfunding — use the five-year gift-tax election to front-load up to $95,000 (single) or $190,000 (couple) per child, giving the money maximum time to grow.
  • Mind financial aid — keep the 529 parent-owned (assessed at most 5.64% on the FAFSA) or use a grandparent-owned plan, whose withdrawals no longer count as student income.
  • Don't fear overfunding — change the beneficiary to another family member, or roll up to $35,000 into the beneficiary's Roth IRA under SECURE 2.0.
  • Watch fees — choose low-cost index or age-based portfolios; high expense ratios quietly erode tax-free growth over 18 years.

529 College Savings Formula (2025)

How projected savings growth is compared against the inflated future cost of college.

FV = PV(1+r)^n + PMT × [ ((1+r)^n − 1) / r ]

Example:

$5,000 now + $300/mo at 6% over 13 years

5000(1.005)^156 + 300 × [((1.005)^156 − 1) / 0.005]
= ≈ $10,670 + $69,800 = $80,500

Variables:

PV - Current 529 savings
PMT - Monthly contribution
r - Monthly return (annual return ÷ 12)
n - Months until college (years to college × 12)

Cost = Σ C × (1 + g)^(t + i) for i = 0 … (years − 1)

Example:

$28,000/yr, 5% inflation, 4 years starting in year 13

28000 × (1.05^13 + 1.05^14 + 1.05^15 + 1.05^16)
= ≈ $227,000 over 4 years

Variables:

C - Current annual college cost
g - College cost inflation rate
t - Years until college starts
i - Each year of attendance (0-indexed)

Gap = Projected Cost − Projected Savings

Example:

$227,000 cost − $80,500 savings

227000 − 80500
= $146,500 shortfall (covers ~35%)

Variables:

Coverage % - Projected Savings ÷ Projected Cost × 100

These formulas provide the mathematical foundation for the calculations. Actual results may vary based on rounding, compounding frequency, and specific lender policies.

How We Calculate & Keep This Accurate

Projected 529 savings are computed by growing your current balance and monthly contributions at your expected annual return with monthly compounding, using standard future-value formulas, until your child reaches the college start age. Projected college cost takes today's annual cost and inflates it to each year of attendance at your chosen cost-inflation rate, then sums across all college years.

Returns and tuition inflation are assumptions you control, not guarantees — actual investment returns vary and college costs differ widely by school. We do not model taxes on non-qualified withdrawals, state-specific deduction limits, or financial-aid outcomes. Results are estimates for planning, not financial advice.

Data & Freshness

Figures reflect 2025 tax-year data.

Last updated June 9, 2026 · Maintained by the Financial Calculator editorial team.

529 Calculator — Frequently Asked Questions

Answers to the most common questions about saving for college with a 529 plan, including tax benefits, qualified expenses, financial aid, and the Roth rollover.

How much should I save in a 529?

A reasonable target is to cover one-third to one-half of your child's projected college cost from savings, with the rest coming from current income, scholarships, financial aid, and possibly modest student loans — the popular '1/3 rule.' To work out a monthly number, start with today's annual cost of the schools you have in mind (a public in-state university runs roughly $28,000–$30,000 all-in, while private colleges can exceed $60,000), inflate it by 4–6% per year to your child's first college year, then back into a monthly contribution using an assumed investment return of 5–7%. This calculator does that math for you: enter your child's age, the current cost, and your contribution, and it shows whether you're on track or facing a gap. The earlier you start, the smaller the monthly amount needs to be, because compounding does more of the work. A common rule of thumb for a newborn aiming at an in-state public school is roughly $250–$400 per month. Revisit the number every couple of years and adjust as tuition, your income, and your child's plans become clearer. Saving something consistently beats waiting for the 'perfect' amount.

What are the tax benefits of a 529?

A 529 plan's headline benefit is tax-free growth: your investments compound without annual federal taxes on dividends or capital gains, and withdrawals are completely tax-free at the federal level when used for qualified education expenses. That tax-free compounding can add up to tens of thousands of extra dollars over 18 years compared with a taxable brokerage account. On top of the federal treatment, more than 30 states offer a state income-tax deduction or credit for 529 contributions — for example, some states let you deduct several thousand dollars per beneficiary each year, and a handful (like Indiana) offer a flat credit. The catch is that most states only give the break for contributions to their own plan, so check your state's rules before choosing an out-of-state plan. 529s also offer estate-planning advantages: contributions are completed gifts that leave your taxable estate, yet you retain control as the account owner. There is no federal income-tax deduction for contributions, and non-qualified withdrawals are taxed on earnings plus a 10% penalty. Consult a tax advisor to confirm your state's specific deduction limits and recapture rules.

What are qualified 529 expenses?

Qualified expenses are the costs you can pay tax-free from a 529. For college and graduate school these include tuition and mandatory fees, books, supplies, and required equipment (including a computer, software, and internet access used by the student), and room and board for students enrolled at least half-time — capped at the school's published cost-of-attendance allowance for on-campus living, or the actual amount charged for campus housing. Beyond college, federal law has broadened 529s significantly: you can use up to $10,000 per year per beneficiary for K-12 tuition, pay for registered apprenticeship program costs, and repay up to $10,000 of student loans over the beneficiary's lifetime (plus another $10,000 for each of their siblings). What does not qualify: transportation, travel, health insurance, college application or testing fees, and general living expenses beyond the room-and-board allowance. Extracurricular costs and a car are also out. Spending 529 money on non-qualified items triggers income tax plus a 10% penalty on the earnings portion. Keep receipts and match withdrawals to expenses within the same calendar year to stay compliant and avoid an unexpected tax bill.

529 vs other college savings options?

A 529 is usually the most tax-efficient dedicated college vehicle, but it's worth comparing. A Coverdell ESA also grows tax-free for education and allows broader investment choices, but contributions are capped at $2,000 per year and phase out at higher incomes — too small for most college goals. A custodial UGMA/UTMA account is flexible (the money isn't restricted to education) but offers no tax-free growth, is taxed at the child's rate, and becomes the child's property at adulthood, which hurts financial aid more than a 529. A Roth IRA can double as college savings because contributions can be withdrawn penalty-free and earnings used for education avoid the 10% penalty (though earnings are still taxed) — useful if you're unsure your child will attend college, but it competes with your retirement. Plain taxable brokerage accounts offer total flexibility but no tax advantages. For most families saving specifically for college, the 529 wins on tax-free growth, high contribution limits, state deductions, and the new Roth rollover safety valve. Many parents use a 529 as the core and a Roth IRA or brokerage account as a flexible supplement.

What if my child doesn't go to college (Roth rollover)?

Unused 529 money is no longer a trap. You have several options if your child skips college, wins scholarships, or doesn't use all the funds. First, you can change the beneficiary at any time to another qualifying family member — a sibling, yourself, a future grandchild, or even a cousin — with no tax consequences, so the account can wait for the next student. Second, if your child receives a scholarship, you can withdraw up to the scholarship amount and the usual 10% penalty is waived (you still owe income tax on the earnings). Third, and new under SECURE 2.0, you can roll over unused 529 funds into the beneficiary's Roth IRA — up to a $35,000 lifetime limit, subject to annual Roth contribution limits and a requirement that the 529 has been open for at least 15 years. This gives leftover college savings a tax-advantaged retirement home. Finally, you can simply take a non-qualified withdrawal and pay income tax plus the 10% penalty on earnings only — your original contributions always come back tax- and penalty-free. Because of these escape hatches, the old fear of 'over-saving' in a 529 is largely outdated.

How does a 529 affect financial aid?

A 529 has a relatively gentle effect on need-based financial aid, which is one of its underrated advantages. When the account is owned by a parent (the usual case), it counts as a parental asset on the FAFSA, and parental assets are assessed at a maximum of 5.64% in the Student Aid Index calculation. So a $50,000 parent-owned 529 reduces aid eligibility by at most about $2,820 — far less than if the same money were a student asset, which is assessed at 20%. Distributions from a parent-owned 529 are no longer counted as student income on the FAFSA, removing a past penalty. Grandparent-owned 529s used to hurt aid because withdrawals counted as student income, but under the simplified FAFSA those distributions are no longer reported at all — making grandparent 529s especially attractive now. Note that some private colleges use the CSS Profile, which can treat 529s differently and may still consider grandparent accounts. The bottom line: a parent-owned 529 is one of the most aid-friendly ways to save, and you should not avoid saving out of fear it will eliminate aid — the trade-off strongly favors saving.

Prepaid vs savings 529 plans?

There are two kinds of 529 plans. A 529 savings plan — the common type this calculator models — is an investment account where you choose portfolios (often age-based options that automatically grow more conservative as college nears), and your balance rises or falls with the markets. You bear the investment risk, but you keep the upside, can use the money at virtually any accredited school nationwide and many abroad, and benefit from the full range of qualified expenses. A 529 prepaid tuition plan instead lets you lock in future tuition at today's prices, typically at in-state public colleges, hedging directly against tuition inflation. Prepaid plans remove market risk but are far more restrictive: most are limited to specific state schools, many are closed to new enrollees, they usually cover tuition and fees only (not room and board), and refunds or out-of-state transfers can yield less than you'd hoped. Some prepaid plans also depend on the state's financial backing. For most families, the flexibility, broad school eligibility, and growth potential of a savings plan outweigh the certainty of a prepaid plan — but a prepaid plan can suit risk-averse families confident their child will attend an in-state public university.

Can I superfund a 529?

Yes. 'Superfunding' uses a special 529 rule called five-year gift-tax averaging, which lets you front-load up to five years' worth of the annual gift-tax exclusion into a single year without triggering gift tax or using your lifetime exemption. With the annual exclusion at $19,000 per person in 2025, one parent can contribute up to $95,000 at once, and a married couple can jointly contribute up to $190,000 per child in a single year, electing on a gift-tax return to spread it over five years. The advantage is powerful: getting a large sum invested early gives compounding many more years to work, potentially adding substantial growth versus contributing gradually. Grandparents often use superfunding for estate planning, because the lump sum immediately leaves their taxable estate while they retain control of the account. The trade-offs: you can't make additional gift-tax-free contributions to that beneficiary during the five-year period, and if you die within those years a prorated portion may be pulled back into your estate. Superfunding suits families with the cash on hand who want to maximize tax-free growth and reduce their estate — confirm the current exclusion amount and file the gift-tax election correctly.
US 529 Calculator User Reviews

Disclaimer: Results are estimates for planning only and do not constitute tax, legal, lending, or investment advice. Actual paycheck and tax outcomes can vary based on employer settings, local rules, and personal elections. Consult a qualified US tax professional, CFP, or attorney before making financial decisions.