Formulas and 2026 figures checked & updated: July 2026
Varies by state — enter 0 if your state has no deduction.
How to Use the 529 College Savings Calculator
- Enter your current 529 plan balance — the amount already saved, or $0 if you're starting fresh.
- Enter your planned monthly contribution — how much you and any other contributors will add each month.
- Enter your child's current age and the age they'll start college, typically 18.
- Set your expected annual investment return based on your plan's asset allocation — age-based portfolios often average 5%–7% over a full investment horizon.
- Enter your state's 529 tax deduction rate, if your state offers one, to see estimated annual and total tax savings.
- Review your projected balance at college age, along with how much comes from contributions versus investment growth. Example: starting with $5,000, contributing $250/month, and earning 6.5% annually from age 2 to 18 (16 years) grows to a projected balance well over $80,000 — more than half of which comes from investment growth, not contributions alone.
What This Calculator Does
The 529 College Savings Calculator projects how a college savings plan balance grows from today until the year your child starts school, combining your current 529 balance, ongoing monthly contributions, and your expected investment return into a single future-value estimate. Because 529 plans are the most widely used education savings vehicle in the US — offered in some form by every state, with hundreds of billions of dollars held in accounts nationwide — this calculator is built to answer the two questions every saving parent or grandparent asks: how much will I have by the time tuition bills start, and how much should I be contributing each month to hit my target?
Four inputs drive the projection: your current balance, your monthly contribution, the number of years until your child starts college, and your expected annual return. As a rule of thumb, families using age-based 529 portfolios typically see average annual returns in the 5%–7% range over a full 18-year horizon, since these portfolios gradually shift from stock-heavy allocations to more conservative bonds and cash as the child nears college age. The calculator also factors in your state's income tax deduction rate — many states offer a deduction or credit for contributions to their own plan, with rates commonly ranging from about 2% to 10% of the contribution, which meaningfully lowers the effective cost of saving.
Use this calculator when you're deciding how much to contribute each month toward a child's or grandchild's education, comparing the payoff of starting a 529 plan early versus later, or checking whether your current savings pace is on track to cover a meaningful share of projected tuition costs — with public four-year in-state tuition and fees running well into five figures per year and private four-year tuition often exceeding $40,000 per year. Because compounding needs time to work, a modest projected shortfall today is usually best solved by increasing monthly contributions now rather than waiting.
Formula
FV = PV(1+r)ⁿ + PMT × [(1+r)ⁿ − 1] / rStandard future value of a lump sum plus a monthly annuity, compounded monthly over the years until your child starts college.
- PVCurrent 529 balance
- PMTMonthly contribution
- rMonthly investment return (annual rate ÷ 12)
Examples
Example: Starting at age 2, contributing until 18
$5,000 initial balance, $250/month, 6.5% average return, 16 years to grow.
Projected balance is well over $80,000 by college age — more than half of that from investment growth, not just contributions.
Example: Starting later with a higher monthly contribution
$0 starting balance, $500/month, 7% average return, starting when your child is 10 years old (8 years to grow).
Projected balance is approximately $64,000 by age 18 — about $48,000 from contributions and $16,000 from investment growth, showing that starting later means a much larger share of the final balance has to come from your own contributions rather than compounding.
Key Terms Explained
- Compound Interest
- Interest earned on both your original balance and previously earned interest, so growth accelerates the longer money stays invested.
- Principal
- The original amount borrowed or invested, before interest. Each loan payment is split between paying down principal and paying interest.
- Roth IRA
- A retirement account funded with after-tax dollars. Contributions and earnings grow tax-free, and qualified withdrawals in retirement owe no tax.
Continue Your Financial Planning
Methodology
The current balance and monthly contributions are compounded using the standard future-value-of-annuity formula over the years until your child reaches college age. State tax savings are estimated as your monthly contribution × 12 × your state's deduction rate, each year the plan is funded.
Frequently Asked Questions
What is a 529 plan?+
A 529 plan is a tax-advantaged investment account for education expenses. Contributions grow tax-free, and withdrawals for qualified education costs — tuition, room and board, books — are also tax-free at the federal level.
Do 529 contributions reduce my federal taxes?+
No federal deduction, but many states offer a state income tax deduction or credit for contributions to their own 529 plan. Check your state's specific rules — this varies widely.
What if my child doesn't go to college?+
You can change the beneficiary to another family member, use funds for K-12 tuition or apprenticeship programs (up to certain limits), or roll a portion into a Roth IRA for the beneficiary under recent rule changes. Non-qualified withdrawals owe tax plus a 10% penalty on earnings.
How much should I contribute to a 529 plan each month?+
There's no single right amount — it depends on your target school cost, years until enrollment, and expected investment return. A common approach is to estimate the future cost of the type of school you're planning for (in-state public, private, etc.), then use a calculator like this one to solve for the monthly contribution that reaches that target by your child's college start age. Many planners suggest aiming to cover roughly a third to half of projected costs through savings, with the remainder covered by income, financial aid, or loans.
What is the 529 plan contribution limit in 2026?+
There's no federal annual contribution limit for 529 plans, but contributions count as gifts for tax purposes. In 2026 you can generally contribute up to the annual gift tax exclusion per contributor, per beneficiary, without filing a gift tax return, or elect to front-load five years of contributions at once under special 529 averaging rules. Total account balances are capped by each state, typically ranging from roughly $235,000 to over $550,000 depending on the state.
Is a 529 plan better than a regular brokerage account for college savings?+
For education-specific savings, 529 plans generally win on taxes: earnings grow tax-free and qualified withdrawals owe no federal tax, plus many states add a deduction or credit. A regular taxable brokerage account offers more flexibility since there are no restrictions on how the money is spent, but investment growth is subject to capital gains tax when sold. Many families use a 529 plan as the primary vehicle for expected education costs and a brokerage account for extra flexibility beyond that.
Can I save my results?+
Yes. Use “Save results” to store a snapshot. Without an account it remains in this browser. If you log in, saved scenarios sync securely to your SmartRates account so they are available on your other devices.
How do I share my calculation?+
Click “Share” in the toolbar to copy a link (or open your device’s share sheet). The link encodes your exact inputs, so whoever opens it sees the calculator pre-filled with the same numbers and the same result.
Can I email my calculator results?+
Yes. Click “Email results” to open your default email application with the current inputs, results, and calculator link already included. Review the message and choose the recipient before sending.
Can I export or print my results as a PDF?+
Yes. Click “Export PDF” to open a clean, printable summary of your inputs and results that you can save as a PDF or print. It includes a timestamp and a link back to the calculator.
How accurate are the calculator results?+
The arithmetic follows the formula and assumptions documented on this page. The result is still an estimate because actual rates, fees, taxes, timing conventions, eligibility rules, and provider calculations can differ. Use figures from your official quote, statement, contract, or tax form before making a financial decision.
Which inputs have the biggest effect on the result?+
Rate, time, starting balance, recurring payments or contributions, and fees usually have the largest effects. Change one input at a time to create a conservative, expected, and optimistic scenario instead of relying on a single forecast.
Are taxes, fees, and inflation included?+
Only when they appear as an input or are explicitly described in the methodology. Do not assume an omitted cost is zero. Review the formula and methodology sections to see exactly what is included before comparing the result with an outside quote.
Can this calculator predict future rates or returns?+
No. A calculator projects the assumptions entered; it cannot predict market returns, inflation, variable interest rates, tax-law changes, or provider decisions. Rerun the calculation with several assumptions to understand the range of possible outcomes.
Why might my lender, bank, broker, or tax software show a different result?+
Professional systems may use daily timing, transaction dates, compounding conventions, rounding rules, account-specific fees, credits, eligibility details, or regulations that a general-purpose calculator cannot know. A small difference can be rounding; a large difference usually means an assumption or included cost is different.
Disclaimer: Calculations are for informational purposes only and do not constitute professional financial advice. Please consult with a certified professional before making financial decisions.