Compound Interest Calculator
See how your savings or investments grow over time with compound interest and regular contributions.
How compound interest works
Compound interest is interest earned on both your original balance and on interest you've already earned. The more often it compounds — daily, monthly, or annually — the faster your balance grows, especially over long time horizons.
Why regular contributions matter
Adding a fixed amount on a regular schedule (like a monthly deposit) compounds alongside your starting balance. Over 20–30 years, consistent contributions are often the biggest driver of the final total — more than the starting amount itself.