Kids Investing Calculator

College, university, trade school, a first car, a deposit on a home. Whatever you're building toward, enter your child's age today and the age they'll need the money, and see what steady saving turns into by then.

$0
Saved by age 18
Age 4 Age 18
Projected balance Contributions
Total Put In
$0
Total Growth
$0

For illustrative purposes only. Not financial, tax, or investment advice.

4 years old
Age 18
$
$
10.0%
2.5%

Real return after inflation: 4.4%. Results are shown in today's money. Set inflation to 0% for future dollars.

0.0%

How much you raise your monthly amount each year above baseline inflation.

Track it alongside everything else. WealthTrunk handles common accounts like 529s, UTMA/UGMA, custodial brokerage accounts, and custom account types, so you can organize you kid's accounts with the rest of your money. Custom account types can be created for your specific needs.

Try the app

Why starting age matters so much

Drag the "child's age" slider and watch the growth figure move. The contributions barely change, but the growth changes dramatically. Time is the most important factor in investing.

  • Starting at birth gives an 18-year runway, long enough that growth often rivals contributions.
  • Starting at 10 roughly halves the runway, and growth becomes a much smaller share of the total.
  • A short horizon shifts the question from "how do I grow this?" to "how do I not lose it?"

Keep going

Become A Financial Maximizer

Start tracking your net worth today. See where you stand and where you're headed.

Downloadon the App Store

Free to download. No account required.