Monthly College Savings Needed Calculator
Example: College savings target: 150000 $ · Current college savings: 20000 $ · Years until needed: 12 years · Expected annual return: 6 %
| Monthly savings needed | $519 |
| Remaining funding gap | $108,985 |
| Your balance will grow to | $41,015 |
Worked example
Suppose your target is $150,000 in 12 years and you already have $20,000 saved. At a 6% return, that $20,000 grows to about $40,900 on its own. The remaining gap is roughly $109,100. Funding that gap over 144 months at 6% requires about $525 a month. Notice how the existing balance does heavy lifting through compounding, which is the mathematical reason an early start shrinks the monthly burden so dramatically.
Frequently asked questions
How is this different from a full college projection?
A full projection estimates the future cost of college for you from today's tuition and inflation. This tool assumes you already have a target dollar amount and simply solves for the monthly deposit. Use this when you know your number and want the payment.
What return rate should I assume?
For a 529 invested in an age-based or diversified portfolio, a long-run assumption of 5 to 7% is common, trending more conservative as college nears. Lower the rate for a shorter horizon or a more cautious allocation, which raises the required monthly amount.
What if the monthly number is unaffordable?
You have three levers: save for more years by starting now, lower the target by planning for a less expensive school or partial funding, or accept a higher expected return through a growth-tilted allocation earlier on. Even partial funding cuts future borrowing.
Should I automate the contribution?
Yes. Setting up an automatic monthly transfer into a 529 removes the temptation to skip, smooths market timing through dollar-cost averaging, and turns the number this tool produces into steady, hands-off progress toward the goal.