Compound Interest FAQ

Frequently asked questions about compound interest calculations, assumptions, and how to use the calculator.

What is compound interest?

It’s interest on your principal plus accumulated interest — so growth can accelerate over time.

Why does time matter so much?

Because compounding is exponential. Longer horizons allow the “interest on interest” effect to build.

Does compounding frequency matter?

Yes, but it’s often smaller than people expect. Time, contributions, and the rate usually matter more.

Can I add contributions?

Yes — the calculator supports optional monthly contributions to model realistic saving/investing.

Is this financial advice?

No. It’s educational. Use results as estimates and consider your personal circumstances.