Project how a starting balance and regular contributions could grow over time, and see how much of the result is compounding rather than your own money.
What this calculator estimates
Compound interest is what happens when the interest you earn starts earning interest of its own. This tool projects a balance forward from a starting amount, adds your regular contributions, and compounds the lot at the rate and frequency you choose. The result separates the three things that matter: what you put in, what compounding added on top, and the total at the end. Enter your opening balance, how much you contribute each period, the rate you expect, and the time frame to see an indicative projection.
What actually drives the number
Three levers do most of the work, and time is the strongest. A modest rate over twenty years will usually beat a higher rate over five, because compounding needs room to run. Contribution frequency matters too — money added fortnightly starts earning sooner than the same amount added once a year. The rate is the lever people fixate on, but it is also the one nobody controls: real returns move around, and a flat assumed rate is a planning convenience, not a promise. This projection deliberately ignores tax, fees and inflation so you can see the mechanism clearly.
Use it as a starting point
Treat the figure as a way to pressure-test a plan, not a forecast. The useful question is rarely "what will I have" — it is whether the structure around the money, the time frame, and the contribution pattern actually serve where you want to end up. Book a strategy session and we will work through your real numbers properly.
General information only — not personal financial product or credit advice. Investment returns are not guaranteed and this estimate is indicative, ignoring tax, fees and inflation. Your actual position depends on your full circumstances. AeFin is an Australian Credit Representative (CR 464548) of Finsure (ACL 384704).