Investing term

What is Compounding?

When your returns earn returns of their own, so money grows faster the longer it's invested.

Compounding is what happens when your investment returns start earning returns of their own. The first year your money grows on your original amount; after that it grows on the original plus all the gains already added — so the growth itself keeps growing. It's the quiet engine behind almost every long-term fortune, and it rewards patience above everything else.

The striking part is how back-loaded it is: most of the money appears late, after decades of build-up. That's why starting early matters far more than starting big — years in the market are the one ingredient you can never add back later.

For example

$1,000 left to compound at 8% becomes about $2,159 after 10 years — but $10,063 after 30. Most of that growth lands in the final decade.

Compounding is taught hands-on in Stage 1 — Money, Goals & Your Financial Foundation.

See the lesson →

Related terms

APRAnnual Percentage Rate. The yearly interest cost of a loan, including most fees.Emergency fundCash reserved for unexpected expenses, usually 3–6 months of your usual spending.Employer matchFree money from an employer that matches part of what you contribute to a workplace retirement plan.High-yield savings accountA bank account that pays meaningfully more interest than a standard checking account.
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