Use our calculator to discover the power of compound interest and how it could help your savings and investments grow over time.
Are you planning for retirement, saving for a big purchase or building a rainy day fund? Whatever your savings goals, this tool helps you project your future balance based on your initial deposit, interest rate and optional monthly contributions.
What is Compound Interest?
Compound interest is when you earn interest on both your original money (called the principal) and on the interest that money has already earned.
Think of it like a snowball rolling downhill — it gets bigger and bigger as it picks up more snow. In the same way, your money grows faster over time because the interest keeps building on itself.
R
Enter your starting balance in ZAR.
5.0%
Use presets or the slider. 0–20% range, 0.1% step.
years
Future value after 10 years
R 16 470,09
Initial amount
R 10 000,00
Total interest earned
R 6 470,09
Effective annual yield (approx)
5.00% @ monthly
Growth by year
Estimates only. Doesn’t include taxes, fees or inflation. Not financial advice.
Important Information
This calculator is for illustrative purposes only and does not constitute financial advice.
It makes certain assumptions, including a fixed interest rate and regular compounding, which may not reflect real-world conditions. Actual investment and savings returns may vary depending on market conditions and inflation.
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