About Compound

Compound is a free, ad-supported compound interest calculator that shows exactly how deposits, rates and time combine, with a year-by-year breakdown.

How we research

• Every rule, rate and figure is checked against primary sources: standard financial mathematics and Government of Canada consumer guidance.
• Guides list their sources so you can verify them yourself.
• We review pages whenever the underlying rules change, and at least once a year. The "Updated" date on each page shows the last review.

Corrections

If you spot an error, tell us. We fix mistakes promptly and update the page date when we do.

How we're funded

Compound is supported by advertising served by Google AdSense. Advertisers have no say in what we publish, and we don't accept payment to recommend any company or product.

What we're not

We're not financial advisors, and calculations are illustrations, not predictions. Read our full disclaimer.