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College Series

Part 3: How do we solve?

Using time and compound growth to reach your inflation-adjusted college savings goal

November 1, 2024
4 min read
Part 3: How do we solve?

Part 3: How Much to Save Each Month

You know your inflation-adjusted target from Part 2. Now let's calculate your monthly savings needed to reach that goal.

Note: We are going to first calculate how to save for college the 'classical' way to get a feel for the maths. Then we will look at how there is the potential to front-load this within financial independence.

Four Numbers That Determine Your Monthly Savings

1. Your Target Amount

The inflation-adjusted future cost you calculated in Part 2.

2. Current Savings

Any money you've already saved for college.

3. Time Until College

Years remaining until your child starts freshman year.

4. Expected Growth Rate

Annual investment returns based on your timeline.

Calculate Your Monthly Savings

Use the calculator below to see exactly how much you need to save each month:

College Monthly Savings Calculator

$80k$165k$250k
1yr10yr18yr
$0$40k$80k
3%7%10%

Your College Savings Plan

Target Needed
$150,000
Your Plan
$150,000
Current Savings: $49,179
Monthly Savings: $100,821

Monthly Savings Required

$582

Save this amount monthly for 10 years

Total Contributions

$69,899

Over 10 years

Note: This calculator assumes steady returns and does not account for taxes or fees. Adjust your plan as needed.

What Investment Growth Rate to Use

Your expected returns depend on how long you have until college. The closer to college, the less risk you want to take.

1-3 Years

4-5%

Savings accounts, CDs

4-8 Years

6-7%

Conservative investing

9+ Years

7-8%

Stock market investing

Note:Use 7% for most calculations. It's conservative but realistic.

Why Starting Early Makes All the Difference

Let's look at the dramatically different monthly savings required depending on when you start. In this example, our target is $150,000, starting with $0 saved and assuming 7% returns.

Start at Birth

(18 years to save)

$350

per month

Start at Age 8

(10 years to save)

$730

per month

Start at Age 13

(5 years to save)

$2,180

per month

Key insight: Starting when your child is born requires 6x less monthly savings than waiting until they're 13.

Ready to Optimize Your Path to Financial Independence?

Use MoneyOnFIRE's calculator to see exactly how different strategies affect your timeline to FI.