529 Plan Calculator

Project how your college savings grow with monthly contributions and compound returns. Enter your numbers and press Calculate to see the future balance.

Written by TopicDrill Editorial Team·Updated June 2026

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Balance over time

Balance Contributed

How a 529 plan grows

A 529 plan turns steady contributions into a college fund through compounding. Your starting balance and every monthly deposit are invested, and the returns are reinvested so they earn returns of their own. The earlier you start, the more time the account has to compound before tuition bills arrive.

The chart above separates the money you put in from the growth on top of it. Early on the two lines stay close together, since most of the balance is your own contributions. Over the years the gap widens as investment earnings take on a larger share of the total.

A quick example

Start with $5,000, add $250 a month, and assume a 6% annual return over 18 years. By the time college begins you would have contributed $59,000 of your own money, yet the account could be worth noticeably more once compound growth is added on top.

Things to keep in mind

Returns are estimates, not guarantees, and investment values rise and fall. Withdrawals stay tax-free only when used for qualified education expenses, so plan around that. For official details on 529 plans, see the U.S. Securities and Exchange Commission. To compare with general investing, try our compound interest calculator.

Frequently asked questions

What is a 529 plan?

A 529 plan is a tax-advantaged investment account designed to help families save for education. Earnings grow free of federal tax, and withdrawals are tax-free when used for qualified education expenses such as tuition, fees, books and certain room and board costs.

How is 529 plan growth calculated?

Growth comes from compounding. Your starting balance and each monthly contribution earn an expected annual return, reinvested over time. This calculator compounds monthly, so contributions added earlier have more time to grow than those added near the end.

What return should I assume for a 529 plan?

It depends on your investment mix. Age-based portfolios often start more aggressive and shift toward conservative holdings as college nears. A long-term assumption of 5% to 7% is common, but returns are not guaranteed and vary year to year. Use a figure you are comfortable with.

Are 529 contributions tax deductible?

There is no federal deduction for contributions, but many states offer a state income tax deduction or credit for residents who use their own state plan. Rules vary widely, so check your state program and consult the official guidance before assuming a tax benefit.

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