How it works
This calculator projects what college will cost when your child enrolls, then calculates the monthly savings you need to reach that goal. It accounts for two key forces: education cost inflation (which erodes the value of your savings) and investment returns (which grow your contributions).
You provide five inputs: today's annual cost, the yearly inflation rate for education, how many years until college starts, how many years of college you're funding, and the annual return rate on your savings. The calculator compounds the cost forward, determines the total you'll need, then works backward to find your required monthly payment.
The formula
Total Cost = Annual Cost × (1 + Inflation Rate)^(Years Until College) × Years of College
Monthly Savings = Total Cost ÷ [((1 + Monthly Return Rate)^(Months of Saving) − 1) ÷ Monthly Return Rate]
The first line inflates today's cost to the year college begins. The second line uses the future value of an annuity formula to find the monthly deposit needed, given your expected investment returns.
Worked example
Let's say your child is 8 years old, college costs $30,000 per year today, education inflation runs 5% annually, and you expect your investments to return 6% per year. You want to fund all four years.
Step 1: Project the cost when college starts (10 years from now)
- Year 1 of college (10 years away): $30,000 × (1.05)^10 = $48,866
- Year 2: $30,000 × (1.05)^11 = $51,309
- Year 3: $30,000 × (1.05)^12 = $53,874
- Year 4: $30,000 × (1.05)^13 = $56,568
- Total needed in 10 years: $210,617
Step 2: Calculate monthly savings With a 6% annual return (0.5% monthly), saving for 120 months:
- Monthly savings = $210,617 ÷ 158.77 ≈ $1,326/month
If you save $1,326 every month and earn 6% annually, you'll have roughly $210,617 when your child enters college—enough to cover all four years at current costs plus inflation.
Common mistakes
Forgetting inflation. Many people calculate college cost as today's price × 4 years, then wonder why they're short. Inflation compounds; a 5% annual increase over 12 years nearly doubles the cost.
Overestimating returns. Tempting to assume 10% returns, but that's risky if college is near. Use a return rate that matches your actual investment strategy—conservative if you're 3 years out, moderate if you're 15 years out.
Assuming fixed annual costs. In reality, some years cost more (engineering programs, room & board increases). This calculator uses an average; if you know one year will be significantly higher, adjust your total cost input upward.
Not accounting for scholarships. If your child is likely to earn merit aid or you expect grants, reduce the total cost before calculating. This tool shows the full sticker price; reality may be lower.
This is an estimate for planning purposes, not professional financial or educational advice. Consult a financial advisor for a personalized strategy.