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The cost of higher education rises every year. Use our precise 529 forecasting tool to see if your current savings and monthly contributions are on track to fully fund your child's degree.
Last updated: March 2, 2026
Because 529 plans shield all earnings from capital gains taxes, starting early and allowing compound interest to work over 18 years is heavily incentivized by the math.
If you are highly confident you or your children will incur college expenses, the 529 plan is arguably the most powerful wealth-building tool in the U.S. tax code specifically for that purpose.
If you put $50,000 in a normal brokerage account and it grows to $150,000, you owe the IRS massive taxes on the $100,000 profit when you sell. In a 529 plan, that $100,000 profit is completely tax-free if used for education.
Over 30 states will essentially pay you to save for college. For example, if you are a New York couple, you can deduct up to $10,000 of 529 contributions from your state taxable income every single year, yielding an immediate tax refund simply for saving money.
The biggest historically cited fear of 529s was "what if my kid doesn't go to college?" The SECURE 2.0 Act fixed this. Assuming the account has been open for 15 years, up to $35,000 of unused funds can be seamlessly rolled over into a Roth IRA for the beneficiary to kickstart their retirement.
A 529 plan is a tax-advantaged college savings investment account designed to grow and be withdrawn tax-free for qualified education expenses. The reason the 529 plan calculator is so valuable is simple: compounding works best when you start early, contribute consistently, and hold your investment horizon steady.
This calculator uses the standard future value approach: it projects the growth of your current balance plus the compounded value of monthly contributions. Contributions are treated as an annuity due (added at the beginning of each month), and the return is compounded monthly.
Inputs used by the calculator
Months
months = (collegeAge - childAge) × 12
Monthly rate
r = (annualReturn / 100) / 12
Targets
future funding gap vs costTarget
Important: this math assumes a constant rate of return compounded monthly and contributions at the beginning of each month. Real markets fluctuate, and your actual result may differ.
These examples use the same future value math as your calculator. Values are rounded for readability.
Age 5 → 18, balance $10,000
$300/month, 7.5% return, target $150,000
Birth moment: balance $5,000
$500/month, 6.0% return, target $200,000
Age 8 → 18, balance $20,000
$200/month, 8.0% return, target $180,000
Use this table as a practical “sanity check” for how changing monthly contributions affects your projected outcome (based on a single scenario).
| Scenario | Monthly Contribution | Projected 529 Balance | Funding Gap | % Funded |
|---|---|---|---|---|
| Conservative | $150 / mo | $66,113.06 | $83,886.94 | 44.08% |
| Balanced | $250 / mo | $92,567.54 | $57,432.46 | 61.71% |
| On Track-ish | $300 / mo | $105,794.78 | $44,205.22 | 70.53% |
| Strong | $400 / mo | $132,249.25 | $17,750.75 | 88.17% |
| Overfunded | $500 / mo | $158,703.73 | $0 | 105.80% |
Scenario used: childAge=5, collegeAge=18, starting balance=$10,000, annualReturn=7.5%, costTarget=$150,000.
Projected 529 Balance
Total you expect to have when your child enrolls, assuming constant return and your contribution schedule.
Tax-Free Earnings
The growth portion (projected future value minus principal contributed). This is the “power” part of 529 planning.
Funding Gap
How much short of your college cost target you are expected to be. If non-zero, the calculator recommends increasing monthly contributions.
Help your friends and family benchmark their college savings goals before tuition prices climb higher.
Suggested hashtags: #CollegeSavings #529Plan #PersonalFinance #InvestingForKids