529 College Savings Calculator United States

A 529 college savings plan is a tax-advantaged way to save for a child's education in the United States. You invest after-tax dollars, the balance grows without being taxed year to year, and the growth comes out tax-free when it pays for qualified education expenses. This 529 college savings calculator projects what your plan could be worth when college starts, using your current balance, your monthly contribution, an expected rate of return, and the number of years left to save.

How the 529 projection works

The calculator compounds monthly. It grows your starting balance at your expected annual return, adds each monthly contribution, and lets every deposit compound for the months remaining until college. A 529 shelters earnings from tax, so the projected balance is the amount you can spend on qualified costs, with no tax to subtract at the end. The result is split into the money you contributed and the tax-free growth earned on it.

Why time in the market matters

A contribution made when a child is born has around eighteen years to grow, while the same contribution made in high school has almost none. The earliest deposits grow the most because their growth also earns growth, so a modest monthly amount started early can end up ahead of a larger amount started late. Shorten the years-until-college input by a few years and the tax-free growth portion of the balance drops noticeably.

Choosing a realistic return

The return you enter should match how the plan is invested. Most 529 plans offer age-based or enrollment-date portfolios that hold more stocks when college is far away and shift into bonds and cash as it approaches. A long horizon can support a higher assumption, but a plan only a few years from its first tuition bill should be modeled conservatively, because there is little time to recover from a downturn. Run the calculator with a cautious figure and an optimistic one to see the range of outcomes.

A worked example

Suppose you already have $5,000 in a 529, you contribute $300 a month, you assume a 6 percent annual return, and college is 15 years away. Compounding the balance and deposits monthly, the calculator projects roughly $99,500 when college begins. About $59,000 of that is money you contributed and the remaining $40,500 is tax-free growth. In a taxable account, part of that growth would have gone to taxes on dividends and gains along the way.

Making the most of a 529

Steady contributions matter most, but the account has other advantages. Many states offer an income-tax deduction or credit for contributions to their own plan, which lowers your cost of saving. If a child does not use all the funds, you can change the beneficiary to another family member or, under current rules, roll a limited amount into a Roth IRA. Because the tax benefit is on growth, a 529 helps most when it is funded early and left to compound.

Assumptions and limitations

This is a planning estimate. It assumes a constant rate of return and a level monthly contribution, while real markets fluctuate and most families raise contributions over time. It does not model state tax deductions or credits, plan fees, contribution limits, financial-aid effects, or the tax and penalty on non-qualified withdrawals. It also assumes every dollar is spent on qualified education expenses, so the growth stays tax-free. Treat the projected value as a target, not a guarantee, and revisit it as your returns and timeline change.

About This 529 Calculator

Use this 529 calculator to get an instant estimate based on the figures you enter. Adjust the inputs above to match your situation, or browse all our calculators to plan your next step.